* Update to jpeg-6b (only a decade old)

git-svn-id: svn://svn.icculus.org/quake3/trunk@1452 edf5b092-35ff-0310-97b2-ce42778d08ea

66 files changed, 3406 insertions, 1446 deletions

diff --git a/Makefile b/Makefile
index cec340c..2082085 100644
--- a/Makefile
+++ b/Makefile
@@ -158,7 +158,7 @@ BLIBDIR=$(MOUNT_DIR)/botlib
 NDIR=$(MOUNT_DIR)/null
 UIDIR=$(MOUNT_DIR)/ui
 Q3UIDIR=$(MOUNT_DIR)/q3_ui
-JPDIR=$(MOUNT_DIR)/jpeg-6
+JPDIR=$(MOUNT_DIR)/jpeg-6b
 SPEEXDIR=$(MOUNT_DIR)/libspeex
 Q3ASMDIR=$(MOUNT_DIR)/tools/asm
 LBURGDIR=$(MOUNT_DIR)/tools/lcc/lburg
diff --git a/code/jpeg-6/README b/code/jpeg-6b/README
index 86cc206..86cc206 100644
--- a/code/jpeg-6/README
+++ b/code/jpeg-6b/README
diff --git a/code/jpeg-6b/ioq3-changes.diff b/code/jpeg-6b/ioq3-changes.diff
new file mode 100644
index 0000000..1ce424b
--- /dev/null
+++ b/code/jpeg-6b/ioq3-changes.diff
@@ -0,0 +1,916 @@
+diff -u -w /home/tma/sources/jpeg-6b/jcdctmgr.c ./jcdctmgr.c
+--- /home/tma/sources/jpeg-6b/jcdctmgr.c	1996-01-13 19:15:12.000000000 +0000
++++ ./jcdctmgr.c	2008-08-22 00:07:09.000000000 +0100
+@@ -57,7 +57,6 @@
+   int ci, qtblno, i;
+   jpeg_component_info *compptr;
+   JQUANT_TBL * qtbl;
+-  DCTELEM * dtbl;
+ 
+   for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+        ci++, compptr++) {
+@@ -168,6 +167,8 @@
+ }
+ 
+ 
++/* code/jpeg-6b/jcdctmgr.c:184: warning: ‘forward_DCT’ defined but not used */
++#if 0
+ /*
+  * Perform forward DCT on one or more blocks of a component.
+  *
+@@ -262,6 +263,7 @@
+     }
+   }
+ }
++#endif
+ 
+ 
+ #ifdef DCT_FLOAT_SUPPORTED
+diff -u -w /home/tma/sources/jpeg-6b/jcmainct.c ./jcmainct.c
+--- /home/tma/sources/jpeg-6b/jcmainct.c	1996-01-06 23:24:59.000000000 +0000
++++ ./jcmainct.c	2008-08-22 00:10:21.000000000 +0100
+@@ -68,32 +68,32 @@
+ METHODDEF(void)
+ start_pass_main (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
+ {
+-  my_main_ptr main = (my_main_ptr) cinfo->main;
++  my_main_ptr jmain = (my_main_ptr) cinfo->main;
+ 
+   /* Do nothing in raw-data mode. */
+   if (cinfo->raw_data_in)
+     return;
+ 
+-  main->cur_iMCU_row = 0;	/* initialize counters */
+-  main->rowgroup_ctr = 0;
+-  main->suspended = FALSE;
+-  main->pass_mode = pass_mode;	/* save mode for use by process_data */
++  jmain->cur_iMCU_row = 0;	/* initialize counters */
++  jmain->rowgroup_ctr = 0;
++  jmain->suspended = FALSE;
++  jmain->pass_mode = pass_mode;	/* save mode for use by process_data */
+ 
+   switch (pass_mode) {
+   case JBUF_PASS_THRU:
+ #ifdef FULL_MAIN_BUFFER_SUPPORTED
+-    if (main->whole_image[0] != NULL)
++    if (jmain->whole_image[0] != NULL)
+       ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+ #endif
+-    main->pub.process_data = process_data_simple_main;
++    jmain->pub.process_data = process_data_simple_main;
+     break;
+ #ifdef FULL_MAIN_BUFFER_SUPPORTED
+   case JBUF_SAVE_SOURCE:
+   case JBUF_CRANK_DEST:
+   case JBUF_SAVE_AND_PASS:
+-    if (main->whole_image[0] == NULL)
++    if (jmain->whole_image[0] == NULL)
+       ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+-    main->pub.process_data = process_data_buffer_main;
++    jmain->pub.process_data = process_data_buffer_main;
+     break;
+ #endif
+   default:
+@@ -114,46 +114,46 @@
+ 			  JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
+ 			  JDIMENSION in_rows_avail)
+ {
+-  my_main_ptr main = (my_main_ptr) cinfo->main;
++  my_main_ptr jmain = (my_main_ptr) cinfo->main;
+ 
+-  while (main->cur_iMCU_row < cinfo->total_iMCU_rows) {
+-    /* Read input data if we haven't filled the main buffer yet */
+-    if (main->rowgroup_ctr < DCTSIZE)
++  while (jmain->cur_iMCU_row < cinfo->total_iMCU_rows) {
++    /* Read input data if we haven't filled the jmain buffer yet */
++    if (jmain->rowgroup_ctr < DCTSIZE)
+       (*cinfo->prep->pre_process_data) (cinfo,
+ 					input_buf, in_row_ctr, in_rows_avail,
+-					main->buffer, &main->rowgroup_ctr,
++					jmain->buffer, &jmain->rowgroup_ctr,
+ 					(JDIMENSION) DCTSIZE);
+ 
+     /* If we don't have a full iMCU row buffered, return to application for
+      * more data.  Note that preprocessor will always pad to fill the iMCU row
+      * at the bottom of the image.
+      */
+-    if (main->rowgroup_ctr != DCTSIZE)
++    if (jmain->rowgroup_ctr != DCTSIZE)
+       return;
+ 
+     /* Send the completed row to the compressor */
+-    if (! (*cinfo->coef->compress_data) (cinfo, main->buffer)) {
++    if (! (*cinfo->coef->compress_data) (cinfo, jmain->buffer)) {
+       /* If compressor did not consume the whole row, then we must need to
+        * suspend processing and return to the application.  In this situation
+        * we pretend we didn't yet consume the last input row; otherwise, if
+        * it happened to be the last row of the image, the application would
+        * think we were done.
+        */
+-      if (! main->suspended) {
++      if (! jmain->suspended) {
+ 	(*in_row_ctr)--;
+-	main->suspended = TRUE;
++	jmain->suspended = TRUE;
+       }
+       return;
+     }
+     /* We did finish the row.  Undo our little suspension hack if a previous
+-     * call suspended; then mark the main buffer empty.
++     * call suspended; then mark the jmain buffer empty.
+      */
+-    if (main->suspended) {
++    if (jmain->suspended) {
+       (*in_row_ctr)++;
+-      main->suspended = FALSE;
++      jmain->suspended = FALSE;
+     }
+-    main->rowgroup_ctr = 0;
+-    main->cur_iMCU_row++;
++    jmain->rowgroup_ctr = 0;
++    jmain->cur_iMCU_row++;
+   }
+ }
+ 
+@@ -170,25 +170,25 @@
+ 			  JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
+ 			  JDIMENSION in_rows_avail)
+ {
+-  my_main_ptr main = (my_main_ptr) cinfo->main;
++  my_main_ptr jmain = (my_main_ptr) cinfo->main;
+   int ci;
+   jpeg_component_info *compptr;
+-  boolean writing = (main->pass_mode != JBUF_CRANK_DEST);
++  boolean writing = (jmain->pass_mode != JBUF_CRANK_DEST);
+ 
+-  while (main->cur_iMCU_row < cinfo->total_iMCU_rows) {
++  while (jmain->cur_iMCU_row < cinfo->total_iMCU_rows) {
+     /* Realign the virtual buffers if at the start of an iMCU row. */
+-    if (main->rowgroup_ctr == 0) {
++    if (jmain->rowgroup_ctr == 0) {
+       for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+ 	   ci++, compptr++) {
+-	main->buffer[ci] = (*cinfo->mem->access_virt_sarray)
+-	  ((j_common_ptr) cinfo, main->whole_image[ci],
+-	   main->cur_iMCU_row * (compptr->v_samp_factor * DCTSIZE),
++	jmain->buffer[ci] = (*cinfo->mem->access_virt_sarray)
++	  ((j_common_ptr) cinfo, jmain->whole_image[ci],
++	   jmain->cur_iMCU_row * (compptr->v_samp_factor * DCTSIZE),
+ 	   (JDIMENSION) (compptr->v_samp_factor * DCTSIZE), writing);
+       }
+       /* In a read pass, pretend we just read some source data. */
+       if (! writing) {
+ 	*in_row_ctr += cinfo->max_v_samp_factor * DCTSIZE;
+-	main->rowgroup_ctr = DCTSIZE;
++	jmain->rowgroup_ctr = DCTSIZE;
+       }
+     }
+ 
+@@ -197,40 +197,40 @@
+     if (writing) {
+       (*cinfo->prep->pre_process_data) (cinfo,
+ 					input_buf, in_row_ctr, in_rows_avail,
+-					main->buffer, &main->rowgroup_ctr,
++					jmain->buffer, &jmain->rowgroup_ctr,
+ 					(JDIMENSION) DCTSIZE);
+       /* Return to application if we need more data to fill the iMCU row. */
+-      if (main->rowgroup_ctr < DCTSIZE)
++      if (jmain->rowgroup_ctr < DCTSIZE)
+ 	return;
+     }
+ 
+     /* Emit data, unless this is a sink-only pass. */
+-    if (main->pass_mode != JBUF_SAVE_SOURCE) {
+-      if (! (*cinfo->coef->compress_data) (cinfo, main->buffer)) {
++    if (jmain->pass_mode != JBUF_SAVE_SOURCE) {
++      if (! (*cinfo->coef->compress_data) (cinfo, jmain->buffer)) {
+ 	/* If compressor did not consume the whole row, then we must need to
+ 	 * suspend processing and return to the application.  In this situation
+ 	 * we pretend we didn't yet consume the last input row; otherwise, if
+ 	 * it happened to be the last row of the image, the application would
+ 	 * think we were done.
+ 	 */
+-	if (! main->suspended) {
++	if (! jmain->suspended) {
+ 	  (*in_row_ctr)--;
+-	  main->suspended = TRUE;
++	  jmain->suspended = TRUE;
+ 	}
+ 	return;
+       }
+       /* We did finish the row.  Undo our little suspension hack if a previous
+-       * call suspended; then mark the main buffer empty.
++       * call suspended; then mark the jmain buffer empty.
+        */
+-      if (main->suspended) {
++      if (jmain->suspended) {
+ 	(*in_row_ctr)++;
+-	main->suspended = FALSE;
++	jmain->suspended = FALSE;
+       }
+     }
+ 
+     /* If get here, we are done with this iMCU row.  Mark buffer empty. */
+-    main->rowgroup_ctr = 0;
+-    main->cur_iMCU_row++;
++    jmain->rowgroup_ctr = 0;
++    jmain->cur_iMCU_row++;
+   }
+ }
+ 
+@@ -238,21 +238,21 @@
+ 
+ 
+ /*
+- * Initialize main buffer controller.
++ * Initialize jmain buffer controller.
+  */
+ 
+ GLOBAL(void)
+ jinit_c_main_controller (j_compress_ptr cinfo, boolean need_full_buffer)
+ {
+-  my_main_ptr main;
++  my_main_ptr jmain;
+   int ci;
+   jpeg_component_info *compptr;
+ 
+-  main = (my_main_ptr)
++  jmain = (my_main_ptr)
+     (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+ 				SIZEOF(my_main_controller));
+-  cinfo->main = (struct jpeg_c_main_controller *) main;
+-  main->pub.start_pass = start_pass_main;
++  cinfo->main = (struct jpeg_c_main_controller *) jmain;
++  jmain->pub.start_pass = start_pass_main;
+ 
+   /* We don't need to create a buffer in raw-data mode. */
+   if (cinfo->raw_data_in)
+@@ -267,7 +267,7 @@
+     /* Note we pad the bottom to a multiple of the iMCU height */
+     for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+ 	 ci++, compptr++) {
+-      main->whole_image[ci] = (*cinfo->mem->request_virt_sarray)
++      jmain->whole_image[ci] = (*cinfo->mem->request_virt_sarray)
+ 	((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
+ 	 compptr->width_in_blocks * DCTSIZE,
+ 	 (JDIMENSION) jround_up((long) compptr->height_in_blocks,
+@@ -279,12 +279,12 @@
+ #endif
+   } else {
+ #ifdef FULL_MAIN_BUFFER_SUPPORTED
+-    main->whole_image[0] = NULL; /* flag for no virtual arrays */
++    jmain->whole_image[0] = NULL; /* flag for no virtual arrays */
+ #endif
+     /* Allocate a strip buffer for each component */
+     for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+ 	 ci++, compptr++) {
+-      main->buffer[ci] = (*cinfo->mem->alloc_sarray)
++      jmain->buffer[ci] = (*cinfo->mem->alloc_sarray)
+ 	((j_common_ptr) cinfo, JPOOL_IMAGE,
+ 	 compptr->width_in_blocks * DCTSIZE,
+ 	 (JDIMENSION) (compptr->v_samp_factor * DCTSIZE));
+diff -u -w /home/tma/sources/jpeg-6b/jdatasrc.c ./jdatasrc.c
+--- /home/tma/sources/jpeg-6b/jdatasrc.c	1996-01-06 23:26:42.000000000 +0000
++++ ./jdatasrc.c	2008-08-22 00:00:59.000000000 +0100
+@@ -19,13 +19,17 @@
+ #include "jpeglib.h"
+ #include "jerror.h"
+ 
++#ifndef MIN
++#define MIN(a, b) ((a)<(b)?(a):(b))
++#endif
+ 
+ /* Expanded data source object for stdio input */
+ 
+ typedef struct {
+   struct jpeg_source_mgr pub;	/* public fields */
+ 
+-  FILE * infile;		/* source stream */
++  unsigned char *inbuf;		/* source stream */
++  size_t inbufbytes;
+   JOCTET * buffer;		/* start of buffer */
+   boolean start_of_file;	/* have we gotten any data yet? */
+ } my_source_mgr;
+@@ -90,18 +94,19 @@
+ fill_input_buffer (j_decompress_ptr cinfo)
+ {
+   my_src_ptr src = (my_src_ptr) cinfo->src;
+-  size_t nbytes;
+-
+-  nbytes = JFREAD(src->infile, src->buffer, INPUT_BUF_SIZE);
++  size_t nbytes = MIN(src->inbufbytes, INPUT_BUF_SIZE);
+ 
+   if (nbytes <= 0) {
+-    if (src->start_of_file)	/* Treat empty input file as fatal error */
+-      ERREXIT(cinfo, JERR_INPUT_EMPTY);
+     WARNMS(cinfo, JWRN_JPEG_EOF);
+     /* Insert a fake EOI marker */
+     src->buffer[0] = (JOCTET) 0xFF;
+     src->buffer[1] = (JOCTET) JPEG_EOI;
+     nbytes = 2;
++  } else {
++    memcpy( src->buffer, src->inbuf, nbytes);
++
++    src->inbuf += nbytes;
++    src->inbufbytes -= nbytes;
+   }
+ 
+   src->pub.next_input_byte = src->buffer;
+@@ -179,7 +184,7 @@
+  */
+ 
+ GLOBAL(void)
+-jpeg_stdio_src (j_decompress_ptr cinfo, FILE * infile)
++jpeg_mem_src (j_decompress_ptr cinfo, unsigned char *inbuf, size_t size)
+ {
+   my_src_ptr src;
+ 
+@@ -206,7 +211,8 @@
+   src->pub.skip_input_data = skip_input_data;
+   src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */
+   src->pub.term_source = term_source;
+-  src->infile = infile;
++  src->inbuf = inbuf;
++  src->inbufbytes = size;
+   src->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */
+   src->pub.next_input_byte = NULL; /* until buffer loaded */
+ }
+diff -u -w /home/tma/sources/jpeg-6b/jdmainct.c ./jdmainct.c
+--- /home/tma/sources/jpeg-6b/jdmainct.c	1996-01-06 23:27:17.000000000 +0000
++++ ./jdmainct.c	2008-08-22 00:13:48.000000000 +0100
+@@ -159,7 +159,7 @@
+  * This is done only once, not once per pass.
+  */
+ {
+-  my_main_ptr main = (my_main_ptr) cinfo->main;
++  my_main_ptr jmain = (my_main_ptr) cinfo->main;
+   int ci, rgroup;
+   int M = cinfo->min_DCT_scaled_size;
+   jpeg_component_info *compptr;
+@@ -168,10 +168,10 @@
+   /* Get top-level space for component array pointers.
+    * We alloc both arrays with one call to save a few cycles.
+    */
+-  main->xbuffer[0] = (JSAMPIMAGE)
++  jmain->xbuffer[0] = (JSAMPIMAGE)
+     (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+ 				cinfo->num_components * 2 * SIZEOF(JSAMPARRAY));
+-  main->xbuffer[1] = main->xbuffer[0] + cinfo->num_components;
++  jmain->xbuffer[1] = jmain->xbuffer[0] + cinfo->num_components;
+ 
+   for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+        ci++, compptr++) {
+@@ -184,9 +184,9 @@
+       (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+ 				  2 * (rgroup * (M + 4)) * SIZEOF(JSAMPROW));
+     xbuf += rgroup;		/* want one row group at negative offsets */
+-    main->xbuffer[0][ci] = xbuf;
++    jmain->xbuffer[0][ci] = xbuf;
+     xbuf += rgroup * (M + 4);
+-    main->xbuffer[1][ci] = xbuf;
++    jmain->xbuffer[1][ci] = xbuf;
+   }
+ }
+ 
+@@ -194,13 +194,13 @@
+ LOCAL(void)
+ make_funny_pointers (j_decompress_ptr cinfo)
+ /* Create the funny pointer lists discussed in the comments above.
+- * The actual workspace is already allocated (in main->buffer),
++ * The actual workspace is already allocated (in jmain->buffer),
+  * and the space for the pointer lists is allocated too.
+  * This routine just fills in the curiously ordered lists.
+  * This will be repeated at the beginning of each pass.
+  */
+ {
+-  my_main_ptr main = (my_main_ptr) cinfo->main;
++  my_main_ptr jmain = (my_main_ptr) cinfo->main;
+   int ci, i, rgroup;
+   int M = cinfo->min_DCT_scaled_size;
+   jpeg_component_info *compptr;
+@@ -210,10 +210,10 @@
+        ci++, compptr++) {
+     rgroup = (compptr->v_samp_factor * compptr->DCT_scaled_size) /
+       cinfo->min_DCT_scaled_size; /* height of a row group of component */
+-    xbuf0 = main->xbuffer[0][ci];
+-    xbuf1 = main->xbuffer[1][ci];
++    xbuf0 = jmain->xbuffer[0][ci];
++    xbuf1 = jmain->xbuffer[1][ci];
+     /* First copy the workspace pointers as-is */
+-    buf = main->buffer[ci];
++    buf = jmain->buffer[ci];
+     for (i = 0; i < rgroup * (M + 2); i++) {
+       xbuf0[i] = xbuf1[i] = buf[i];
+     }
+@@ -240,7 +240,7 @@
+  * This changes the pointer list state from top-of-image to the normal state.
+  */
+ {
+-  my_main_ptr main = (my_main_ptr) cinfo->main;
++  my_main_ptr jmain = (my_main_ptr) cinfo->main;
+   int ci, i, rgroup;
+   int M = cinfo->min_DCT_scaled_size;
+   jpeg_component_info *compptr;
+@@ -250,8 +250,8 @@
+        ci++, compptr++) {
+     rgroup = (compptr->v_samp_factor * compptr->DCT_scaled_size) /
+       cinfo->min_DCT_scaled_size; /* height of a row group of component */
+-    xbuf0 = main->xbuffer[0][ci];
+-    xbuf1 = main->xbuffer[1][ci];
++    xbuf0 = jmain->xbuffer[0][ci];
++    xbuf1 = jmain->xbuffer[1][ci];
+     for (i = 0; i < rgroup; i++) {
+       xbuf0[i - rgroup] = xbuf0[rgroup*(M+1) + i];
+       xbuf1[i - rgroup] = xbuf1[rgroup*(M+1) + i];
+@@ -269,7 +269,7 @@
+  * Also sets rowgroups_avail to indicate number of nondummy row groups in row.
+  */
+ {
+-  my_main_ptr main = (my_main_ptr) cinfo->main;
++  my_main_ptr jmain = (my_main_ptr) cinfo->main;
+   int ci, i, rgroup, iMCUheight, rows_left;
+   jpeg_component_info *compptr;
+   JSAMPARRAY xbuf;
+@@ -286,12 +286,12 @@
+      * so we need only do it once.
+      */
+     if (ci == 0) {
+-      main->rowgroups_avail = (JDIMENSION) ((rows_left-1) / rgroup + 1);
++      jmain->rowgroups_avail = (JDIMENSION) ((rows_left-1) / rgroup + 1);
+     }
+     /* Duplicate the last real sample row rgroup*2 times; this pads out the
+      * last partial rowgroup and ensures at least one full rowgroup of context.
+      */
+-    xbuf = main->xbuffer[main->whichptr][ci];
++    xbuf = jmain->xbuffer[jmain->whichptr][ci];
+     for (i = 0; i < rgroup * 2; i++) {
+       xbuf[rows_left + i] = xbuf[rows_left-1];
+     }
+@@ -306,27 +306,27 @@
+ METHODDEF(void)
+ start_pass_main (j_decompress_ptr cinfo, J_BUF_MODE pass_mode)
+ {
+-  my_main_ptr main = (my_main_ptr) cinfo->main;
++  my_main_ptr jmain = (my_main_ptr) cinfo->main;
+ 
+   switch (pass_mode) {
+   case JBUF_PASS_THRU:
+     if (cinfo->upsample->need_context_rows) {
+-      main->pub.process_data = process_data_context_main;
++      jmain->pub.process_data = process_data_context_main;
+       make_funny_pointers(cinfo); /* Create the xbuffer[] lists */
+-      main->whichptr = 0;	/* Read first iMCU row into xbuffer[0] */
+-      main->context_state = CTX_PREPARE_FOR_IMCU;
+-      main->iMCU_row_ctr = 0;
++      jmain->whichptr = 0;	/* Read first iMCU row into xbuffer[0] */
++      jmain->context_state = CTX_PREPARE_FOR_IMCU;
++      jmain->iMCU_row_ctr = 0;
+     } else {
+       /* Simple case with no context needed */
+-      main->pub.process_data = process_data_simple_main;
++      jmain->pub.process_data = process_data_simple_main;
+     }
+-    main->buffer_full = FALSE;	/* Mark buffer empty */
+-    main->rowgroup_ctr = 0;
++    jmain->buffer_full = FALSE;	/* Mark buffer empty */
++    jmain->rowgroup_ctr = 0;
+     break;
+ #ifdef QUANT_2PASS_SUPPORTED
+   case JBUF_CRANK_DEST:
+     /* For last pass of 2-pass quantization, just crank the postprocessor */
+-    main->pub.process_data = process_data_crank_post;
++    jmain->pub.process_data = process_data_crank_post;
+     break;
+ #endif
+   default:
+@@ -346,14 +346,14 @@
+ 			  JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+ 			  JDIMENSION out_rows_avail)
+ {
+-  my_main_ptr main = (my_main_ptr) cinfo->main;
++  my_main_ptr jmain = (my_main_ptr) cinfo->main;
+   JDIMENSION rowgroups_avail;
+ 
+-  /* Read input data if we haven't filled the main buffer yet */
+-  if (! main->buffer_full) {
+-    if (! (*cinfo->coef->decompress_data) (cinfo, main->buffer))
++  /* Read input data if we haven't filled the jmain buffer yet */
++  if (! jmain->buffer_full) {
++    if (! (*cinfo->coef->decompress_data) (cinfo, jmain->buffer))
+       return;			/* suspension forced, can do nothing more */
+-    main->buffer_full = TRUE;	/* OK, we have an iMCU row to work with */
++    jmain->buffer_full = TRUE;	/* OK, we have an iMCU row to work with */
+   }
+ 
+   /* There are always min_DCT_scaled_size row groups in an iMCU row. */
+@@ -364,14 +364,14 @@
+    */
+ 
+   /* Feed the postprocessor */
+-  (*cinfo->post->post_process_data) (cinfo, main->buffer,
+-				     &main->rowgroup_ctr, rowgroups_avail,
++  (*cinfo->post->post_process_data) (cinfo, jmain->buffer,
++				     &jmain->rowgroup_ctr, rowgroups_avail,
+ 				     output_buf, out_row_ctr, out_rows_avail);
+ 
+   /* Has postprocessor consumed all the data yet? If so, mark buffer empty */
+-  if (main->rowgroup_ctr >= rowgroups_avail) {
+-    main->buffer_full = FALSE;
+-    main->rowgroup_ctr = 0;
++  if (jmain->rowgroup_ctr >= rowgroups_avail) {
++    jmain->buffer_full = FALSE;
++    jmain->rowgroup_ctr = 0;
+   }
+ }
+ 
+@@ -386,15 +386,15 @@
+ 			   JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+ 			   JDIMENSION out_rows_avail)
+ {
+-  my_main_ptr main = (my_main_ptr) cinfo->main;
++  my_main_ptr jmain = (my_main_ptr) cinfo->main;
+ 
+-  /* Read input data if we haven't filled the main buffer yet */
+-  if (! main->buffer_full) {
++  /* Read input data if we haven't filled the jmain buffer yet */
++  if (! jmain->buffer_full) {
+     if (! (*cinfo->coef->decompress_data) (cinfo,
+-					   main->xbuffer[main->whichptr]))
++					   jmain->xbuffer[jmain->whichptr]))
+       return;			/* suspension forced, can do nothing more */
+-    main->buffer_full = TRUE;	/* OK, we have an iMCU row to work with */
+-    main->iMCU_row_ctr++;	/* count rows received */
++    jmain->buffer_full = TRUE;	/* OK, we have an iMCU row to work with */
++    jmain->iMCU_row_ctr++;	/* count rows received */
+   }
+ 
+   /* Postprocessor typically will not swallow all the input data it is handed
+@@ -402,47 +402,47 @@
+    * to exit and restart.  This switch lets us keep track of how far we got.
+    * Note that each case falls through to the next on successful completion.
+    */
+-  switch (main->context_state) {
++  switch (jmain->context_state) {
+   case CTX_POSTPONED_ROW:
+     /* Call postprocessor using previously set pointers for postponed row */
+-    (*cinfo->post->post_process_data) (cinfo, main->xbuffer[main->whichptr],
+-			&main->rowgroup_ctr, main->rowgroups_avail,
++    (*cinfo->post->post_process_data) (cinfo, jmain->xbuffer[jmain->whichptr],
++			&jmain->rowgroup_ctr, jmain->rowgroups_avail,
+ 			output_buf, out_row_ctr, out_rows_avail);
+-    if (main->rowgroup_ctr < main->rowgroups_avail)
++    if (jmain->rowgroup_ctr < jmain->rowgroups_avail)
+       return;			/* Need to suspend */
+-    main->context_state = CTX_PREPARE_FOR_IMCU;
++    jmain->context_state = CTX_PREPARE_FOR_IMCU;
+     if (*out_row_ctr >= out_rows_avail)
+       return;			/* Postprocessor exactly filled output buf */
+     /*FALLTHROUGH*/
+   case CTX_PREPARE_FOR_IMCU:
+     /* Prepare to process first M-1 row groups of this iMCU row */
+-    main->rowgroup_ctr = 0;
+-    main->rowgroups_avail = (JDIMENSION) (cinfo->min_DCT_scaled_size - 1);
++    jmain->rowgroup_ctr = 0;
++    jmain->rowgroups_avail = (JDIMENSION) (cinfo->min_DCT_scaled_size - 1);
+     /* Check for bottom of image: if so, tweak pointers to "duplicate"
+      * the last sample row, and adjust rowgroups_avail to ignore padding rows.
+      */
+-    if (main->iMCU_row_ctr == cinfo->total_iMCU_rows)
++    if (jmain->iMCU_row_ctr == cinfo->total_iMCU_rows)
+       set_bottom_pointers(cinfo);
+-    main->context_state = CTX_PROCESS_IMCU;
++    jmain->context_state = CTX_PROCESS_IMCU;
+     /*FALLTHROUGH*/
+   case CTX_PROCESS_IMCU:
+     /* Call postprocessor using previously set pointers */
+-    (*cinfo->post->post_process_data) (cinfo, main->xbuffer[main->whichptr],
+-			&main->rowgroup_ctr, main->rowgroups_avail,
++    (*cinfo->post->post_process_data) (cinfo, jmain->xbuffer[jmain->whichptr],
++			&jmain->rowgroup_ctr, jmain->rowgroups_avail,
+ 			output_buf, out_row_ctr, out_rows_avail);
+-    if (main->rowgroup_ctr < main->rowgroups_avail)
++    if (jmain->rowgroup_ctr < jmain->rowgroups_avail)
+       return;			/* Need to suspend */
+     /* After the first iMCU, change wraparound pointers to normal state */
+-    if (main->iMCU_row_ctr == 1)
++    if (jmain->iMCU_row_ctr == 1)
+       set_wraparound_pointers(cinfo);
+     /* Prepare to load new iMCU row using other xbuffer list */
+-    main->whichptr ^= 1;	/* 0=>1 or 1=>0 */
+-    main->buffer_full = FALSE;
++    jmain->whichptr ^= 1;	/* 0=>1 or 1=>0 */
++    jmain->buffer_full = FALSE;
+     /* Still need to process last row group of this iMCU row, */
+     /* which is saved at index M+1 of the other xbuffer */
+-    main->rowgroup_ctr = (JDIMENSION) (cinfo->min_DCT_scaled_size + 1);
+-    main->rowgroups_avail = (JDIMENSION) (cinfo->min_DCT_scaled_size + 2);
+-    main->context_state = CTX_POSTPONED_ROW;
++    jmain->rowgroup_ctr = (JDIMENSION) (cinfo->min_DCT_scaled_size + 1);
++    jmain->rowgroups_avail = (JDIMENSION) (cinfo->min_DCT_scaled_size + 2);
++    jmain->context_state = CTX_POSTPONED_ROW;
+   }
+ }
+ 
+@@ -469,21 +469,21 @@
+ 
+ 
+ /*
+- * Initialize main buffer controller.
++ * Initialize jmain buffer controller.
+  */
+ 
+ GLOBAL(void)
+ jinit_d_main_controller (j_decompress_ptr cinfo, boolean need_full_buffer)
+ {
+-  my_main_ptr main;
++  my_main_ptr jmain;
+   int ci, rgroup, ngroups;
+   jpeg_component_info *compptr;
+ 
+-  main = (my_main_ptr)
++  jmain = (my_main_ptr)
+     (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+ 				SIZEOF(my_main_controller));
+-  cinfo->main = (struct jpeg_d_main_controller *) main;
+-  main->pub.start_pass = start_pass_main;
++  cinfo->main = (struct jpeg_d_main_controller *) jmain;
++  jmain->pub.start_pass = start_pass_main;
+ 
+   if (need_full_buffer)		/* shouldn't happen */
+     ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+@@ -504,7 +504,7 @@
+        ci++, compptr++) {
+     rgroup = (compptr->v_samp_factor * compptr->DCT_scaled_size) /
+       cinfo->min_DCT_scaled_size; /* height of a row group of component */
+-    main->buffer[ci] = (*cinfo->mem->alloc_sarray)
++    jmain->buffer[ci] = (*cinfo->mem->alloc_sarray)
+ 			((j_common_ptr) cinfo, JPOOL_IMAGE,
+ 			 compptr->width_in_blocks * compptr->DCT_scaled_size,
+ 			 (JDIMENSION) (rgroup * ngroups));
+diff -u -w /home/tma/sources/jpeg-6b/jerror.c ./jerror.c
+--- /home/tma/sources/jpeg-6b/jerror.c	1998-02-22 01:03:15.000000000 +0000
++++ ./jerror.c	2008-08-21 23:58:36.000000000 +0100
+@@ -18,6 +18,8 @@
+  * These routines are used by both the compression and decompression code.
+  */
+ 
++#include "../renderer/tr_local.h"
++
+ /* this is not a core library module, so it doesn't define JPEG_INTERNALS */
+ #include "jinclude.h"
+ #include "jpeglib.h"
+@@ -69,13 +71,15 @@
+ METHODDEF(void)
+ error_exit (j_common_ptr cinfo)
+ {
+-  /* Always display the message */
+-  (*cinfo->err->output_message) (cinfo);
++  char buffer[JMSG_LENGTH_MAX];
++
++  /* Create the message */
++  (*cinfo->err->format_message) (cinfo, buffer);
+ 
+   /* Let the memory manager delete any temp files before we die */
+   jpeg_destroy(cinfo);
+ 
+-  exit(EXIT_FAILURE);
++  ri.Error( ERR_FATAL, "%s\n", buffer );
+ }
+ 
+ 
+@@ -108,7 +112,7 @@
+ 	     MB_OK | MB_ICONERROR);
+ #else
+   /* Send it to stderr, adding a newline */
+-  fprintf(stderr, "%s\n", buffer);
++  ri.Printf(PRINT_ALL, "%s\n", buffer);
+ #endif
+ }
+ 
+diff -u -w /home/tma/sources/jpeg-6b/jinclude.h ./jinclude.h
+--- /home/tma/sources/jpeg-6b/jinclude.h	1994-04-01 21:29:31.000000000 +0100
++++ ./jinclude.h	2008-08-21 23:58:36.000000000 +0100
+@@ -15,9 +15,34 @@
+  */
+ 
+ 
++#ifdef _MSC_VER
++
++#pragma warning(disable : 4018)     // signed/unsigned mismatch
++#pragma warning(disable : 4032)
++#pragma warning(disable : 4051)
++#pragma warning(disable : 4057)		// slightly different base types
++#pragma warning(disable : 4100)		// unreferenced formal parameter
++#pragma warning(disable : 4115)
++#pragma warning(disable : 4125)		// decimal digit terminates octal escape sequence
++#pragma warning(disable : 4127)		// conditional expression is constant
++#pragma warning(disable : 4136)
++#pragma warning(disable : 4152)		// nonstandard extension, function/data pointer conversion in expression
++#pragma warning(disable : 4201)
++#pragma warning(disable : 4214)
++#pragma warning(disable : 4244)
++#pragma warning(disable : 4305)		// truncation from const double to float
++#pragma warning(disable : 4310)		// cast truncates constant value
++#pragma warning(disable:  4505) 	// unreferenced local function has been removed
++#pragma warning(disable : 4514)
++#pragma warning(disable : 4702)		// unreachable code
++#pragma warning(disable : 4711)		// selected for automatic inline expansion
++#pragma warning(disable : 4220)		// varargs matches remaining parameters
++#pragma warning(disable : 4761)		// integral size mismatch 
++#endif
++
+ /* Include auto-config file to find out which system include files we need. */
+ 
+-#include "jconfig.h"		/* auto configuration options */
++#include "../jpeg-6b/jconfig.h"		/* auto configuration options */
+ #define JCONFIG_INCLUDED	/* so that jpeglib.h doesn't do it again */
+ 
+ /*
+diff -u -w /home/tma/sources/jpeg-6b/jmemnobs.c ./jmemnobs.c
+--- /home/tma/sources/jpeg-6b/jmemnobs.c	1996-01-06 23:31:18.000000000 +0000
++++ ./jmemnobs.c	2008-08-21 23:58:36.000000000 +0100
+@@ -8,39 +8,35 @@
+  * This file provides a really simple implementation of the system-
+  * dependent portion of the JPEG memory manager.  This implementation
+  * assumes that no backing-store files are needed: all required space
+- * can be obtained from malloc().
++ * can be obtained from ri.Malloc().
+  * This is very portable in the sense that it'll compile on almost anything,
+  * but you'd better have lots of main memory (or virtual memory) if you want
+  * to process big images.
+  * Note that the max_memory_to_use option is ignored by this implementation.
+  */
+ 
++#include "../renderer/tr_local.h"
++
+ #define JPEG_INTERNALS
+ #include "jinclude.h"
+ #include "jpeglib.h"
+ #include "jmemsys.h"		/* import the system-dependent declarations */
+ 
+-#ifndef HAVE_STDLIB_H		/* <stdlib.h> should declare malloc(),free() */
+-extern void * malloc JPP((size_t size));
+-extern void free JPP((void *ptr));
+-#endif
+-
+-
+ /*
+  * Memory allocation and freeing are controlled by the regular library
+- * routines malloc() and free().
++ * routines ri.Malloc() and ri.Free().
+  */
+ 
+ GLOBAL(void *)
+ jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
+ {
+-  return (void *) malloc(sizeofobject);
++  return (void *) ri.Malloc(sizeofobject);
+ }
+ 
+ GLOBAL(void)
+ jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
+ {
+-  free(object);
++  ri.Free(object);
+ }
+ 
+ 
+@@ -54,13 +50,13 @@
+ GLOBAL(void FAR *)
+ jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
+ {
+-  return (void FAR *) malloc(sizeofobject);
++  return (void FAR *) ri.Malloc(sizeofobject);
+ }
+ 
+ GLOBAL(void)
+ jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
+ {
+-  free(object);
++  ri.Free(object);
+ }
+ 
+ 
+diff -u -w /home/tma/sources/jpeg-6b/jmorecfg.h ./jmorecfg.h
+--- /home/tma/sources/jpeg-6b/jmorecfg.h	1997-08-10 00:58:56.000000000 +0100
++++ ./jmorecfg.h	2008-08-21 23:58:36.000000000 +0100
+@@ -157,7 +157,8 @@
+ 
+ /* INT32 must hold at least signed 32-bit values. */
+ 
+-#ifndef XMD_H			/* X11/xmd.h correctly defines INT32 */
++/* MinGW basetsd.h defines INT32 - don't redefine it */
++#if !(defined __MINGW32__ && defined _BASETSD_H)
+ typedef long INT32;
+ #endif
+ 
+@@ -210,8 +211,10 @@
+  */
+ 
+ #ifdef NEED_FAR_POINTERS
++#undef FAR
+ #define FAR  far
+ #else
++#undef FAR
+ #define FAR
+ #endif
+ 
+@@ -223,9 +226,7 @@
+  * Defining HAVE_BOOLEAN before including jpeglib.h should make it work.
+  */
+ 
+-#ifndef HAVE_BOOLEAN
+-typedef int boolean;
+-#endif
++typedef unsigned char boolean;
+ #ifndef FALSE			/* in case these macros already exist */
+ #define FALSE	0		/* values of boolean */
+ #endif
+@@ -260,8 +261,8 @@
+ 
+ /* Capability options common to encoder and decoder: */
+ 
+-#define DCT_ISLOW_SUPPORTED	/* slow but accurate integer algorithm */
+-#define DCT_IFAST_SUPPORTED	/* faster, less accurate integer method */
++#undef DCT_ISLOW_SUPPORTED	/* slow but accurate integer algorithm */
++#undef DCT_IFAST_SUPPORTED	/* faster, less accurate integer method */
+ #define DCT_FLOAT_SUPPORTED	/* floating-point: accurate, fast on fast HW */
+ 
+ /* Encoder capability options: */
+@@ -283,15 +284,15 @@
+ /* Decoder capability options: */
+ 
+ #undef  D_ARITH_CODING_SUPPORTED    /* Arithmetic coding back end? */
+-#define D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
+-#define D_PROGRESSIVE_SUPPORTED	    /* Progressive JPEG? (Requires MULTISCAN)*/
+-#define SAVE_MARKERS_SUPPORTED	    /* jpeg_save_markers() needed? */
+-#define BLOCK_SMOOTHING_SUPPORTED   /* Block smoothing? (Progressive only) */
+-#define IDCT_SCALING_SUPPORTED	    /* Output rescaling via IDCT? */
++#undef D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
++#undef D_PROGRESSIVE_SUPPORTED	    /* Progressive JPEG? (Requires MULTISCAN)*/
++#undef SAVE_MARKERS_SUPPORTED	    /* jpeg_save_markers() needed? */
++#undef BLOCK_SMOOTHING_SUPPORTED   /* Block smoothing? (Progressive only) */
++#undef IDCT_SCALING_SUPPORTED	    /* Output rescaling via IDCT? */
+ #undef  UPSAMPLE_SCALING_SUPPORTED  /* Output rescaling at upsample stage? */
+-#define UPSAMPLE_MERGING_SUPPORTED  /* Fast path for sloppy upsampling? */
+-#define QUANT_1PASS_SUPPORTED	    /* 1-pass color quantization? */
+-#define QUANT_2PASS_SUPPORTED	    /* 2-pass color quantization? */
++#undef UPSAMPLE_MERGING_SUPPORTED  /* Fast path for sloppy upsampling? */
++#undef QUANT_1PASS_SUPPORTED	    /* 1-pass color quantization? */
++#undef QUANT_2PASS_SUPPORTED	    /* 2-pass color quantization? */
+ 
+ /* more capability options later, no doubt */
+ 
+@@ -314,7 +315,7 @@
+ #define RGB_RED		0	/* Offset of Red in an RGB scanline element */
+ #define RGB_GREEN	1	/* Offset of Green */
+ #define RGB_BLUE	2	/* Offset of Blue */
+-#define RGB_PIXELSIZE	3	/* JSAMPLEs per RGB scanline element */
++#define RGB_PIXELSIZE	4	/* JSAMPLEs per RGB scanline element */
+ 
+ 
+ /* Definitions for speed-related optimizations. */
+diff -u -w /home/tma/sources/jpeg-6b/jpeglib.h ./jpeglib.h
+--- /home/tma/sources/jpeg-6b/jpeglib.h	1998-02-21 19:48:14.000000000 +0000
++++ ./jpeglib.h	2008-08-22 00:01:58.000000000 +0100
+@@ -21,9 +21,9 @@
+  */
+ 
+ #ifndef JCONFIG_INCLUDED	/* in case jinclude.h already did */
+-#include "jconfig.h"		/* widely used configuration options */
++#include "../jpeg-6b/jconfig.h"		/* widely used configuration options */
+ #endif
+-#include "jmorecfg.h"		/* seldom changed options */
++#include "../jpeg-6b/jmorecfg.h"		/* seldom changed options */
+ 
+ 
+ /* Version ID for the JPEG library.
+@@ -835,7 +835,7 @@
+ #define jpeg_destroy_compress	jDestCompress
+ #define jpeg_destroy_decompress	jDestDecompress
+ #define jpeg_stdio_dest		jStdDest
+-#define jpeg_stdio_src		jStdSrc
++#define jpeg_mem_src		jMemSrc
+ #define jpeg_set_defaults	jSetDefaults
+ #define jpeg_set_colorspace	jSetColorspace
+ #define jpeg_default_colorspace	jDefColorspace
+@@ -908,7 +908,7 @@
+ /* Standard data source and destination managers: stdio streams. */
+ /* Caller is responsible for opening the file before and closing after. */
+ EXTERN(void) jpeg_stdio_dest JPP((j_compress_ptr cinfo, FILE * outfile));
+-EXTERN(void) jpeg_stdio_src JPP((j_decompress_ptr cinfo, FILE * infile));
++EXTERN(void) jpeg_mem_src JPP((j_decompress_ptr cinfo, unsigned char *inbuf, size_t size));
+ 
+ /* Default parameter setup for compression */
+ EXTERN(void) jpeg_set_defaults JPP((j_compress_ptr cinfo));
+@@ -1089,8 +1089,8 @@
+  */
+ 
+ #ifdef JPEG_INTERNALS
+-#include "jpegint.h"		/* fetch private declarations */
+-#include "jerror.h"		/* fetch error codes too */
++#include "../jpeg-6b/jpegint.h"		/* fetch private declarations */
++#include "../jpeg-6b/jerror.h"		/* fetch error codes too */
+ #endif
+ 
+ #endif /* JPEGLIB_H */
diff --git a/code/jpeg-6/jcapimin.c b/code/jpeg-6b/jcapimin.c
index 1cd9736..54fb8c5 100644
--- a/code/jpeg-6/jcapimin.c
+++ b/code/jpeg-6b/jcapimin.c
@@ -1,7 +1,7 @@
 /*
  * jcapimin.c
  *
- * Copyright (C) 1994-1995, Thomas G. Lane.
+ * Copyright (C) 1994-1998, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -26,18 +26,31 @@
  * The error manager must already be set up (in case memory manager fails).
  */
 
-GLOBAL void
-jpeg_create_compress (j_compress_ptr cinfo)
+GLOBAL(void)
+jpeg_CreateCompress (j_compress_ptr cinfo, int version, size_t structsize)
 {
   int i;
 
-  /* For debugging purposes, zero the whole master structure.
-   * But error manager pointer is already there, so save and restore it.
+  /* Guard against version mismatches between library and caller. */
+  cinfo->mem = NULL;		/* so jpeg_destroy knows mem mgr not called */
+  if (version != JPEG_LIB_VERSION)
+    ERREXIT2(cinfo, JERR_BAD_LIB_VERSION, JPEG_LIB_VERSION, version);
+  if (structsize != SIZEOF(struct jpeg_compress_struct))
+    ERREXIT2(cinfo, JERR_BAD_STRUCT_SIZE, 
+	     (int) SIZEOF(struct jpeg_compress_struct), (int) structsize);
+
+  /* For debugging purposes, we zero the whole master structure.
+   * But the application has already set the err pointer, and may have set
+   * client_data, so we have to save and restore those fields.
+   * Note: if application hasn't set client_data, tools like Purify may
+   * complain here.
    */
   {
     struct jpeg_error_mgr * err = cinfo->err;
+    void * client_data = cinfo->client_data; /* ignore Purify complaint here */
     MEMZERO(cinfo, SIZEOF(struct jpeg_compress_struct));
     cinfo->err = err;
+    cinfo->client_data = client_data;
   }
   cinfo->is_decompressor = FALSE;
 
@@ -58,6 +71,8 @@ jpeg_create_compress (j_compress_ptr cinfo)
     cinfo->ac_huff_tbl_ptrs[i] = NULL;
   }
 
+  cinfo->script_space = NULL;
+
   cinfo->input_gamma = 1.0;	/* in case application forgets */
 
   /* OK, I'm ready */
@@ -69,7 +84,7 @@ jpeg_create_compress (j_compress_ptr cinfo)
  * Destruction of a JPEG compression object
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_destroy_compress (j_compress_ptr cinfo)
 {
   jpeg_destroy((j_common_ptr) cinfo); /* use common routine */
@@ -81,7 +96,7 @@ jpeg_destroy_compress (j_compress_ptr cinfo)
  * but don't destroy the object itself.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_abort_compress (j_compress_ptr cinfo)
 {
   jpeg_abort((j_common_ptr) cinfo); /* use common routine */
@@ -100,7 +115,7 @@ jpeg_abort_compress (j_compress_ptr cinfo)
  * jcparam.o would be linked whether the application used it or not.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_suppress_tables (j_compress_ptr cinfo, boolean suppress)
 {
   int i;
@@ -128,7 +143,7 @@ jpeg_suppress_tables (j_compress_ptr cinfo, boolean suppress)
  * work including most of the actual output.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_finish_compress (j_compress_ptr cinfo)
 {
   JDIMENSION iMCU_row;
@@ -173,17 +188,44 @@ jpeg_finish_compress (j_compress_ptr cinfo)
  * first call to jpeg_write_scanlines() or jpeg_write_raw_data().
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_write_marker (j_compress_ptr cinfo, int marker,
 		   const JOCTET *dataptr, unsigned int datalen)
 {
+  JMETHOD(void, write_marker_byte, (j_compress_ptr info, int val));
+
+  if (cinfo->next_scanline != 0 ||
+      (cinfo->global_state != CSTATE_SCANNING &&
+       cinfo->global_state != CSTATE_RAW_OK &&
+       cinfo->global_state != CSTATE_WRCOEFS))
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+
+  (*cinfo->marker->write_marker_header) (cinfo, marker, datalen);
+  write_marker_byte = cinfo->marker->write_marker_byte;	/* copy for speed */
+  while (datalen--) {
+    (*write_marker_byte) (cinfo, *dataptr);
+    dataptr++;
+  }
+}
+
+/* Same, but piecemeal. */
+
+GLOBAL(void)
+jpeg_write_m_header (j_compress_ptr cinfo, int marker, unsigned int datalen)
+{
   if (cinfo->next_scanline != 0 ||
       (cinfo->global_state != CSTATE_SCANNING &&
        cinfo->global_state != CSTATE_RAW_OK &&
        cinfo->global_state != CSTATE_WRCOEFS))
     ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
 
-  (*cinfo->marker->write_any_marker) (cinfo, marker, dataptr, datalen);
+  (*cinfo->marker->write_marker_header) (cinfo, marker, datalen);
+}
+
+GLOBAL(void)
+jpeg_write_m_byte (j_compress_ptr cinfo, int val)
+{
+  (*cinfo->marker->write_marker_byte) (cinfo, val);
 }
 
 
@@ -208,7 +250,7 @@ jpeg_write_marker (j_compress_ptr cinfo, int marker,
  * will not re-emit the tables unless it is passed write_all_tables=TRUE.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_write_tables (j_compress_ptr cinfo)
 {
   if (cinfo->global_state != CSTATE_START)
@@ -223,6 +265,16 @@ jpeg_write_tables (j_compress_ptr cinfo)
   (*cinfo->marker->write_tables_only) (cinfo);
   /* And clean up. */
   (*cinfo->dest->term_destination) (cinfo);
-  /* We can use jpeg_abort to release memory. */
-  jpeg_abort((j_common_ptr) cinfo);
+  /*
+   * In library releases up through v6a, we called jpeg_abort() here to free
+   * any working memory allocated by the destination manager and marker
+   * writer.  Some applications had a problem with that: they allocated space
+   * of their own from the library memory manager, and didn't want it to go
+   * away during write_tables.  So now we do nothing.  This will cause a
+   * memory leak if an app calls write_tables repeatedly without doing a full
+   * compression cycle or otherwise resetting the JPEG object.  However, that
+   * seems less bad than unexpectedly freeing memory in the normal case.
+   * An app that prefers the old behavior can call jpeg_abort for itself after
+   * each call to jpeg_write_tables().
+   */
 }
diff --git a/code/jpeg-6/jcapistd.c b/code/jpeg-6b/jcapistd.c
index b99e560..c0320b1 100644
--- a/code/jpeg-6/jcapistd.c
+++ b/code/jpeg-6b/jcapistd.c
@@ -1,7 +1,7 @@
 /*
  * jcapistd.c
  *
- * Copyright (C) 1994-1995, Thomas G. Lane.
+ * Copyright (C) 1994-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -34,7 +34,7 @@
  * wrong thing.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_start_compress (j_compress_ptr cinfo, boolean write_all_tables)
 {
   if (cinfo->global_state != CSTATE_START)
@@ -73,7 +73,7 @@ jpeg_start_compress (j_compress_ptr cinfo, boolean write_all_tables)
  * when using a multiple-scanline buffer.
  */
 
-GLOBAL JDIMENSION
+GLOBAL(JDIMENSION)
 jpeg_write_scanlines (j_compress_ptr cinfo, JSAMPARRAY scanlines,
 		      JDIMENSION num_lines)
 {
@@ -116,7 +116,7 @@ jpeg_write_scanlines (j_compress_ptr cinfo, JSAMPARRAY scanlines,
  * Processes exactly one iMCU row per call, unless suspended.
  */
 
-GLOBAL JDIMENSION
+GLOBAL(JDIMENSION)
 jpeg_write_raw_data (j_compress_ptr cinfo, JSAMPIMAGE data,
 		     JDIMENSION num_lines)
 {
diff --git a/code/jpeg-6/jccoefct.c b/code/jpeg-6b/jccoefct.c
index ea3169b..1963ddb 100644
--- a/code/jpeg-6/jccoefct.c
+++ b/code/jpeg-6b/jccoefct.c
@@ -1,7 +1,7 @@
 /*
  * jccoefct.c
  *
- * Copyright (C) 1994-1995, Thomas G. Lane.
+ * Copyright (C) 1994-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -58,17 +58,17 @@ typedef my_coef_controller * my_coef_ptr;
 
 
 /* Forward declarations */
-METHODDEF boolean compress_data
+METHODDEF(boolean) compress_data
     JPP((j_compress_ptr cinfo, JSAMPIMAGE input_buf));
 #ifdef FULL_COEF_BUFFER_SUPPORTED
-METHODDEF boolean compress_first_pass
+METHODDEF(boolean) compress_first_pass
     JPP((j_compress_ptr cinfo, JSAMPIMAGE input_buf));
-METHODDEF boolean compress_output
+METHODDEF(boolean) compress_output
     JPP((j_compress_ptr cinfo, JSAMPIMAGE input_buf));
 #endif
 
 
-LOCAL void
+LOCAL(void)
 start_iMCU_row (j_compress_ptr cinfo)
 /* Reset within-iMCU-row counters for a new row */
 {
@@ -96,7 +96,7 @@ start_iMCU_row (j_compress_ptr cinfo)
  * Initialize for a processing pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_coef (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
 {
   my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
@@ -135,11 +135,11 @@ start_pass_coef (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
  * per call, ie, v_samp_factor block rows for each component in the image.
  * Returns TRUE if the iMCU row is completed, FALSE if suspended.
  *
- * NB: input_buf contains a plane for each component in image.
- * For single pass, this is the same as the components in the scan.
+ * NB: input_buf contains a plane for each component in image,
+ * which we index according to the component's SOF position.
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 compress_data (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
 {
   my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
@@ -175,7 +175,8 @@ compress_data (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
 	  if (coef->iMCU_row_num < last_iMCU_row ||
 	      yoffset+yindex < compptr->last_row_height) {
 	    (*cinfo->fdct->forward_DCT) (cinfo, compptr,
-					 input_buf[ci], coef->MCU_buffer[blkn],
+					 input_buf[compptr->component_index],
+					 coef->MCU_buffer[blkn],
 					 ypos, xpos, (JDIMENSION) blockcnt);
 	    if (blockcnt < compptr->MCU_width) {
 	      /* Create some dummy blocks at the right edge of the image. */
@@ -240,7 +241,7 @@ compress_data (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
  * at the scan-dependent variables (MCU dimensions, etc).
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 compress_first_pass (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
 {
   my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
@@ -336,7 +337,7 @@ compress_first_pass (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
  * NB: input_buf is ignored; it is likely to be a NULL pointer.
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 compress_output (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
 {
   my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
@@ -400,7 +401,7 @@ compress_output (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
  * Initialize coefficient buffer controller.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_c_coef_controller (j_compress_ptr cinfo, boolean need_full_buffer)
 {
   my_coef_ptr coef;
diff --git a/code/jpeg-6/jccolor.c b/code/jpeg-6b/jccolor.c
index 6707911..0a8a4b5 100644
--- a/code/jpeg-6/jccolor.c
+++ b/code/jpeg-6b/jccolor.c
@@ -1,7 +1,7 @@
 /*
  * jccolor.c
  *
- * Copyright (C) 1991-1994, Thomas G. Lane.
+ * Copyright (C) 1991-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -82,7 +82,7 @@ typedef my_color_converter * my_cconvert_ptr;
  * Initialize for RGB->YCC colorspace conversion.
  */
 
-METHODDEF void
+METHODDEF(void)
 rgb_ycc_start (j_compress_ptr cinfo)
 {
   my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
@@ -126,7 +126,7 @@ rgb_ycc_start (j_compress_ptr cinfo)
  * offset required on that side.
  */
 
-METHODDEF void
+METHODDEF(void)
 rgb_ycc_convert (j_compress_ptr cinfo,
 		 JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
 		 JDIMENSION output_row, int num_rows)
@@ -182,7 +182,7 @@ rgb_ycc_convert (j_compress_ptr cinfo,
  * We assume rgb_ycc_start has been called (we only use the Y tables).
  */
 
-METHODDEF void
+METHODDEF(void)
 rgb_gray_convert (j_compress_ptr cinfo,
 		  JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
 		  JDIMENSION output_row, int num_rows)
@@ -221,7 +221,7 @@ rgb_gray_convert (j_compress_ptr cinfo,
  * We assume rgb_ycc_start has been called.
  */
 
-METHODDEF void
+METHODDEF(void)
 cmyk_ycck_convert (j_compress_ptr cinfo,
 		   JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
 		   JDIMENSION output_row, int num_rows)
@@ -276,7 +276,7 @@ cmyk_ycck_convert (j_compress_ptr cinfo,
  * The source can be either plain grayscale or YCbCr (since Y == gray).
  */
 
-METHODDEF void
+METHODDEF(void)
 grayscale_convert (j_compress_ptr cinfo,
 		   JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
 		   JDIMENSION output_row, int num_rows)
@@ -305,7 +305,7 @@ grayscale_convert (j_compress_ptr cinfo,
  * We assume input_components == num_components.
  */
 
-METHODDEF void
+METHODDEF(void)
 null_convert (j_compress_ptr cinfo,
 	      JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
 	      JDIMENSION output_row, int num_rows)
@@ -337,7 +337,7 @@ null_convert (j_compress_ptr cinfo,
  * Empty method for start_pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 null_method (j_compress_ptr cinfo)
 {
   /* no work needed */
@@ -348,7 +348,7 @@ null_method (j_compress_ptr cinfo)
  * Module initialization routine for input colorspace conversion.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_color_converter (j_compress_ptr cinfo)
 {
   my_cconvert_ptr cconvert;
diff --git a/code/jpeg-6/jcdctmgr.c b/code/jpeg-6b/jcdctmgr.c
index debba72..94d5cda 100644
--- a/code/jpeg-6/jcdctmgr.c
+++ b/code/jpeg-6b/jcdctmgr.c
@@ -1,7 +1,7 @@
 /*
  * jcdctmgr.c
  *
- * Copyright (C) 1994-1995, Thomas G. Lane.
+ * Copyright (C) 1994-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -27,8 +27,7 @@ typedef struct {
 
   /* The actual post-DCT divisors --- not identical to the quant table
    * entries, because of scaling (especially for an unnormalized DCT).
-   * Each table is given in normal array order; note that this must
-   * be converted from the zigzag order of the quantization tables.
+   * Each table is given in normal array order.
    */
   DCTELEM * divisors[NUM_QUANT_TBLS];
 
@@ -51,16 +50,13 @@ typedef my_fdct_controller * my_fdct_ptr;
  * first scan.  Hence all components should be examined here.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_fdctmgr (j_compress_ptr cinfo)
 {
   my_fdct_ptr fdct = (my_fdct_ptr) cinfo->fdct;
   int ci, qtblno, i;
   jpeg_component_info *compptr;
   JQUANT_TBL * qtbl;
-#ifdef DCT_ISLOW_SUPPORTED
-  DCTELEM * dtbl;
-#endif
 
   for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
        ci++, compptr++) {
@@ -85,7 +81,7 @@ start_pass_fdctmgr (j_compress_ptr cinfo)
       }
       dtbl = fdct->divisors[qtblno];
       for (i = 0; i < DCTSIZE2; i++) {
-	dtbl[i] = ((DCTELEM) qtbl->quantval[jpeg_zigzag_order[i]]) << 3;
+	dtbl[i] = ((DCTELEM) qtbl->quantval[i]) << 3;
       }
       break;
 #endif
@@ -100,7 +96,7 @@ start_pass_fdctmgr (j_compress_ptr cinfo)
 	 */
 #define CONST_BITS 14
 	static const INT16 aanscales[DCTSIZE2] = {
-	  /* precomputed values scaled up by 14 bits: in natural order */
+	  /* precomputed values scaled up by 14 bits */
 	  16384, 22725, 21407, 19266, 16384, 12873,  8867,  4520,
 	  22725, 31521, 29692, 26722, 22725, 17855, 12299,  6270,
 	  21407, 29692, 27969, 25172, 21407, 16819, 11585,  5906,
@@ -120,7 +116,7 @@ start_pass_fdctmgr (j_compress_ptr cinfo)
 	dtbl = fdct->divisors[qtblno];
 	for (i = 0; i < DCTSIZE2; i++) {
 	  dtbl[i] = (DCTELEM)
-	    DESCALE(MULTIPLY16V16((INT32) qtbl->quantval[jpeg_zigzag_order[i]],
+	    DESCALE(MULTIPLY16V16((INT32) qtbl->quantval[i],
 				  (INT32) aanscales[i]),
 		    CONST_BITS-3);
 	}
@@ -155,7 +151,7 @@ start_pass_fdctmgr (j_compress_ptr cinfo)
 	for (row = 0; row < DCTSIZE; row++) {
 	  for (col = 0; col < DCTSIZE; col++) {
 	    fdtbl[i] = (FAST_FLOAT)
-	      (1.0 / (((double) qtbl->quantval[jpeg_zigzag_order[i]] *
+	      (1.0 / (((double) qtbl->quantval[i] *
 		       aanscalefactor[row] * aanscalefactor[col] * 8.0)));
 	    i++;
 	  }
@@ -171,6 +167,8 @@ start_pass_fdctmgr (j_compress_ptr cinfo)
 }
 
 
+/* code/jpeg-6b/jcdctmgr.c:184: warning: ‘forward_DCT’ defined but not used */
+#if 0
 /*
  * Perform forward DCT on one or more blocks of a component.
  *
@@ -179,9 +177,98 @@ start_pass_fdctmgr (j_compress_ptr cinfo)
  * blocks. The quantized coefficients are returned in coef_blocks[].
  */
 
+METHODDEF(void)
+forward_DCT (j_compress_ptr cinfo, jpeg_component_info * compptr,
+	     JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
+	     JDIMENSION start_row, JDIMENSION start_col,
+	     JDIMENSION num_blocks)
+/* This version is used for integer DCT implementations. */
+{
+  /* This routine is heavily used, so it's worth coding it tightly. */
+  my_fdct_ptr fdct = (my_fdct_ptr) cinfo->fdct;
+  forward_DCT_method_ptr do_dct = fdct->do_dct;
+  DCTELEM * divisors = fdct->divisors[compptr->quant_tbl_no];
+  DCTELEM workspace[DCTSIZE2];	/* work area for FDCT subroutine */
+  JDIMENSION bi;
+
+  sample_data += start_row;	/* fold in the vertical offset once */
+
+  for (bi = 0; bi < num_blocks; bi++, start_col += DCTSIZE) {
+    /* Load data into workspace, applying unsigned->signed conversion */
+    { register DCTELEM *workspaceptr;
+      register JSAMPROW elemptr;
+      register int elemr;
+
+      workspaceptr = workspace;
+      for (elemr = 0; elemr < DCTSIZE; elemr++) {
+	elemptr = sample_data[elemr] + start_col;
+#if DCTSIZE == 8		/* unroll the inner loop */
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+#else
+	{ register int elemc;
+	  for (elemc = DCTSIZE; elemc > 0; elemc--) {
+	    *workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	  }
+	}
+#endif
+      }
+    }
+
+    /* Perform the DCT */
+    (*do_dct) (workspace);
+
+    /* Quantize/descale the coefficients, and store into coef_blocks[] */
+    { register DCTELEM temp, qval;
+      register int i;
+      register JCOEFPTR output_ptr = coef_blocks[bi];
+
+      for (i = 0; i < DCTSIZE2; i++) {
+	qval = divisors[i];
+	temp = workspace[i];
+	/* Divide the coefficient value by qval, ensuring proper rounding.
+	 * Since C does not specify the direction of rounding for negative
+	 * quotients, we have to force the dividend positive for portability.
+	 *
+	 * In most files, at least half of the output values will be zero
+	 * (at default quantization settings, more like three-quarters...)
+	 * so we should ensure that this case is fast.  On many machines,
+	 * a comparison is enough cheaper than a divide to make a special test
+	 * a win.  Since both inputs will be nonnegative, we need only test
+	 * for a < b to discover whether a/b is 0.
+	 * If your machine's division is fast enough, define FAST_DIVIDE.
+	 */
+#ifdef FAST_DIVIDE
+#define DIVIDE_BY(a,b)	a /= b
+#else
+#define DIVIDE_BY(a,b)	if (a >= b) a /= b; else a = 0
+#endif
+	if (temp < 0) {
+	  temp = -temp;
+	  temp += qval>>1;	/* for rounding */
+	  DIVIDE_BY(temp, qval);
+	  temp = -temp;
+	} else {
+	  temp += qval>>1;	/* for rounding */
+	  DIVIDE_BY(temp, qval);
+	}
+	output_ptr[i] = (JCOEF) temp;
+      }
+    }
+  }
+}
+#endif
+
+
 #ifdef DCT_FLOAT_SUPPORTED
 
-METHODDEF void
+METHODDEF(void)
 forward_DCT_float (j_compress_ptr cinfo, jpeg_component_info * compptr,
 		   JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
 		   JDIMENSION start_row, JDIMENSION start_col,
@@ -256,7 +343,7 @@ forward_DCT_float (j_compress_ptr cinfo, jpeg_component_info * compptr,
  * Initialize FDCT manager.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_forward_dct (j_compress_ptr cinfo)
 {
   my_fdct_ptr fdct;
diff --git a/code/jpeg-6/jchuff.c b/code/jpeg-6b/jchuff.c
index 59f7865..f235250 100644
--- a/code/jpeg-6/jchuff.c
+++ b/code/jpeg-6b/jchuff.c
@@ -1,7 +1,7 @@
 /*
  * jchuff.c
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -86,13 +86,13 @@ typedef struct {
 
 
 /* Forward declarations */
-METHODDEF boolean encode_mcu_huff JPP((j_compress_ptr cinfo,
-				       JBLOCKROW *MCU_data));
-METHODDEF void finish_pass_huff JPP((j_compress_ptr cinfo));
+METHODDEF(boolean) encode_mcu_huff JPP((j_compress_ptr cinfo,
+					JBLOCKROW *MCU_data));
+METHODDEF(void) finish_pass_huff JPP((j_compress_ptr cinfo));
 #ifdef ENTROPY_OPT_SUPPORTED
-METHODDEF boolean encode_mcu_gather JPP((j_compress_ptr cinfo,
-					 JBLOCKROW *MCU_data));
-METHODDEF void finish_pass_gather JPP((j_compress_ptr cinfo));
+METHODDEF(boolean) encode_mcu_gather JPP((j_compress_ptr cinfo,
+					  JBLOCKROW *MCU_data));
+METHODDEF(void) finish_pass_gather JPP((j_compress_ptr cinfo));
 #endif
 
 
@@ -102,7 +102,7 @@ METHODDEF void finish_pass_gather JPP((j_compress_ptr cinfo));
  * just count the Huffman symbols used and generate Huffman code tables.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_huff (j_compress_ptr cinfo, boolean gather_statistics)
 {
   huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
@@ -125,16 +125,14 @@ start_pass_huff (j_compress_ptr cinfo, boolean gather_statistics)
     compptr = cinfo->cur_comp_info[ci];
     dctbl = compptr->dc_tbl_no;
     actbl = compptr->ac_tbl_no;
-    /* Make sure requested tables are present */
-    /* (In gather mode, tables need not be allocated yet) */
-    if (dctbl < 0 || dctbl >= NUM_HUFF_TBLS ||
-	(cinfo->dc_huff_tbl_ptrs[dctbl] == NULL && !gather_statistics))
-      ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, dctbl);
-    if (actbl < 0 || actbl >= NUM_HUFF_TBLS ||
-	(cinfo->ac_huff_tbl_ptrs[actbl] == NULL && !gather_statistics))
-      ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, actbl);
     if (gather_statistics) {
 #ifdef ENTROPY_OPT_SUPPORTED
+      /* Check for invalid table indexes */
+      /* (make_c_derived_tbl does this in the other path) */
+      if (dctbl < 0 || dctbl >= NUM_HUFF_TBLS)
+	ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, dctbl);
+      if (actbl < 0 || actbl >= NUM_HUFF_TBLS)
+	ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, actbl);
       /* Allocate and zero the statistics tables */
       /* Note that jpeg_gen_optimal_table expects 257 entries in each table! */
       if (entropy->dc_count_ptrs[dctbl] == NULL)
@@ -151,9 +149,9 @@ start_pass_huff (j_compress_ptr cinfo, boolean gather_statistics)
     } else {
       /* Compute derived values for Huffman tables */
       /* We may do this more than once for a table, but it's not expensive */
-      jpeg_make_c_derived_tbl(cinfo, cinfo->dc_huff_tbl_ptrs[dctbl],
+      jpeg_make_c_derived_tbl(cinfo, TRUE, dctbl,
 			      & entropy->dc_derived_tbls[dctbl]);
-      jpeg_make_c_derived_tbl(cinfo, cinfo->ac_huff_tbl_ptrs[actbl],
+      jpeg_make_c_derived_tbl(cinfo, FALSE, actbl,
 			      & entropy->ac_derived_tbls[actbl]);
     }
     /* Initialize DC predictions to 0 */
@@ -172,19 +170,34 @@ start_pass_huff (j_compress_ptr cinfo, boolean gather_statistics)
 
 /*
  * Compute the derived values for a Huffman table.
+ * This routine also performs some validation checks on the table.
+ *
  * Note this is also used by jcphuff.c.
  */
 
-GLOBAL void
-jpeg_make_c_derived_tbl (j_compress_ptr cinfo, JHUFF_TBL * htbl,
+GLOBAL(void)
+jpeg_make_c_derived_tbl (j_compress_ptr cinfo, boolean isDC, int tblno,
 			 c_derived_tbl ** pdtbl)
 {
+  JHUFF_TBL *htbl;
   c_derived_tbl *dtbl;
-  int p, i, l, lastp, si;
+  int p, i, l, lastp, si, maxsymbol;
   char huffsize[257];
   unsigned int huffcode[257];
   unsigned int code;
 
+  /* Note that huffsize[] and huffcode[] are filled in code-length order,
+   * paralleling the order of the symbols themselves in htbl->huffval[].
+   */
+
+  /* Find the input Huffman table */
+  if (tblno < 0 || tblno >= NUM_HUFF_TBLS)
+    ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tblno);
+  htbl =
+    isDC ? cinfo->dc_huff_tbl_ptrs[tblno] : cinfo->ac_huff_tbl_ptrs[tblno];
+  if (htbl == NULL)
+    ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tblno);
+
   /* Allocate a workspace if we haven't already done so. */
   if (*pdtbl == NULL)
     *pdtbl = (c_derived_tbl *)
@@ -193,19 +206,21 @@ jpeg_make_c_derived_tbl (j_compress_ptr cinfo, JHUFF_TBL * htbl,
   dtbl = *pdtbl;
   
   /* Figure C.1: make table of Huffman code length for each symbol */
-  /* Note that this is in code-length order. */
 
   p = 0;
   for (l = 1; l <= 16; l++) {
-    for (i = 1; i <= (int) htbl->bits[l]; i++)
+    i = (int) htbl->bits[l];
+    if (i < 0 || p + i > 256)	/* protect against table overrun */
+      ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
+    while (i--)
       huffsize[p++] = (char) l;
   }
   huffsize[p] = 0;
   lastp = p;
   
   /* Figure C.2: generate the codes themselves */
-  /* Note that this is in code-length order. */
-  
+  /* We also validate that the counts represent a legal Huffman code tree. */
+
   code = 0;
   si = huffsize[0];
   p = 0;
@@ -214,6 +229,11 @@ jpeg_make_c_derived_tbl (j_compress_ptr cinfo, JHUFF_TBL * htbl,
       huffcode[p++] = code;
       code++;
     }
+    /* code is now 1 more than the last code used for codelength si; but
+     * it must still fit in si bits, since no code is allowed to be all ones.
+     */
+    if (((INT32) code) >= (((INT32) 1) << si))
+      ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
     code <<= 1;
     si++;
   }
@@ -221,14 +241,25 @@ jpeg_make_c_derived_tbl (j_compress_ptr cinfo, JHUFF_TBL * htbl,
   /* Figure C.3: generate encoding tables */
   /* These are code and size indexed by symbol value */
 
-  /* Set any codeless symbols to have code length 0;
-   * this allows emit_bits to detect any attempt to emit such symbols.
+  /* Set all codeless symbols to have code length 0;
+   * this lets us detect duplicate VAL entries here, and later
+   * allows emit_bits to detect any attempt to emit such symbols.
    */
   MEMZERO(dtbl->ehufsi, SIZEOF(dtbl->ehufsi));
 
+  /* This is also a convenient place to check for out-of-range
+   * and duplicated VAL entries.  We allow 0..255 for AC symbols
+   * but only 0..15 for DC.  (We could constrain them further
+   * based on data depth and mode, but this seems enough.)
+   */
+  maxsymbol = isDC ? 15 : 255;
+
   for (p = 0; p < lastp; p++) {
-    dtbl->ehufco[htbl->huffval[p]] = huffcode[p];
-    dtbl->ehufsi[htbl->huffval[p]] = huffsize[p];
+    i = htbl->huffval[p];
+    if (i < 0 || i > maxsymbol || dtbl->ehufsi[i])
+      ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
+    dtbl->ehufco[i] = huffcode[p];
+    dtbl->ehufsi[i] = huffsize[p];
   }
 }
 
@@ -243,7 +274,7 @@ jpeg_make_c_derived_tbl (j_compress_ptr cinfo, JHUFF_TBL * htbl,
 	      { action; } }
 
 
-LOCAL boolean
+LOCAL(boolean)
 dump_buffer (working_state * state)
 /* Empty the output buffer; return TRUE if successful, FALSE if must suspend */
 {
@@ -267,7 +298,7 @@ dump_buffer (working_state * state)
  */
 
 INLINE
-LOCAL boolean
+LOCAL(boolean)
 emit_bits (working_state * state, unsigned int code, int size)
 /* Emit some bits; return TRUE if successful, FALSE if must suspend */
 {
@@ -305,7 +336,7 @@ emit_bits (working_state * state, unsigned int code, int size)
 }
 
 
-LOCAL boolean
+LOCAL(boolean)
 flush_bits (working_state * state)
 {
   if (! emit_bits(state, 0x7F, 7)) /* fill any partial byte with ones */
@@ -318,7 +349,7 @@ flush_bits (working_state * state)
 
 /* Encode a single block's worth of coefficients */
 
-LOCAL boolean
+LOCAL(boolean)
 encode_one_block (working_state * state, JCOEFPTR block, int last_dc_val,
 		  c_derived_tbl *dctbl, c_derived_tbl *actbl)
 {
@@ -343,6 +374,11 @@ encode_one_block (working_state * state, JCOEFPTR block, int last_dc_val,
     nbits++;
     temp >>= 1;
   }
+  /* Check for out-of-range coefficient values.
+   * Since we're encoding a difference, the range limit is twice as much.
+   */
+  if (nbits > MAX_COEF_BITS+1)
+    ERREXIT(state->cinfo, JERR_BAD_DCT_COEF);
   
   /* Emit the Huffman-coded symbol for the number of bits */
   if (! emit_bits(state, dctbl->ehufco[nbits], dctbl->ehufsi[nbits]))
@@ -380,6 +416,9 @@ encode_one_block (working_state * state, JCOEFPTR block, int last_dc_val,
       nbits = 1;		/* there must be at least one 1 bit */
       while ((temp >>= 1))
 	nbits++;
+      /* Check for out-of-range coefficient values */
+      if (nbits > MAX_COEF_BITS)
+	ERREXIT(state->cinfo, JERR_BAD_DCT_COEF);
       
       /* Emit Huffman symbol for run length / number of bits */
       i = (r << 4) + nbits;
@@ -408,7 +447,7 @@ encode_one_block (working_state * state, JCOEFPTR block, int last_dc_val,
  * Emit a restart marker & resynchronize predictions.
  */
 
-LOCAL boolean
+LOCAL(boolean)
 emit_restart (working_state * state, int restart_num)
 {
   int ci;
@@ -433,7 +472,7 @@ emit_restart (working_state * state, int restart_num)
  * Encode and output one MCU's worth of Huffman-compressed coefficients.
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 encode_mcu_huff (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
 {
   huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
@@ -490,7 +529,7 @@ encode_mcu_huff (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
  * Finish up at the end of a Huffman-compressed scan.
  */
 
-METHODDEF void
+METHODDEF(void)
 finish_pass_huff (j_compress_ptr cinfo)
 {
   huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
@@ -516,19 +555,12 @@ finish_pass_huff (j_compress_ptr cinfo)
 /*
  * Huffman coding optimization.
  *
- * This actually is optimization, in the sense that we find the best possible
- * Huffman table(s) for the given data.  We first scan the supplied data and
- * count the number of uses of each symbol that is to be Huffman-coded.
- * (This process must agree with the code above.)  Then we build an
- * optimal Huffman coding tree for the observed counts.
- *
- * The JPEG standard requires Huffman codes to be no more than 16 bits long.
- * If some symbols have a very small but nonzero probability, the Huffman tree
- * must be adjusted to meet the code length restriction.  We currently use
- * the adjustment method suggested in the JPEG spec.  This method is *not*
- * optimal; it may not choose the best possible limited-length code.  But
- * since the symbols involved are infrequently used, it's not clear that
- * going to extra trouble is worthwhile.
+ * We first scan the supplied data and count the number of uses of each symbol
+ * that is to be Huffman-coded. (This process MUST agree with the code above.)
+ * Then we build a Huffman coding tree for the observed counts.
+ * Symbols which are not needed at all for the particular image are not
+ * assigned any code, which saves space in the DHT marker as well as in
+ * the compressed data.
  */
 
 #ifdef ENTROPY_OPT_SUPPORTED
@@ -536,8 +568,8 @@ finish_pass_huff (j_compress_ptr cinfo)
 
 /* Process a single block's worth of coefficients */
 
-LOCAL void
-htest_one_block (JCOEFPTR block, int last_dc_val,
+LOCAL(void)
+htest_one_block (j_compress_ptr cinfo, JCOEFPTR block, int last_dc_val,
 		 long dc_counts[], long ac_counts[])
 {
   register int temp;
@@ -556,6 +588,11 @@ htest_one_block (JCOEFPTR block, int last_dc_val,
     nbits++;
     temp >>= 1;
   }
+  /* Check for out-of-range coefficient values.
+   * Since we're encoding a difference, the range limit is twice as much.
+   */
+  if (nbits > MAX_COEF_BITS+1)
+    ERREXIT(cinfo, JERR_BAD_DCT_COEF);
 
   /* Count the Huffman symbol for the number of bits */
   dc_counts[nbits]++;
@@ -582,6 +619,9 @@ htest_one_block (JCOEFPTR block, int last_dc_val,
       nbits = 1;		/* there must be at least one 1 bit */
       while ((temp >>= 1))
 	nbits++;
+      /* Check for out-of-range coefficient values */
+      if (nbits > MAX_COEF_BITS)
+	ERREXIT(cinfo, JERR_BAD_DCT_COEF);
       
       /* Count Huffman symbol for run length / number of bits */
       ac_counts[(r << 4) + nbits]++;
@@ -601,7 +641,7 @@ htest_one_block (JCOEFPTR block, int last_dc_val,
  * No data is actually output, so no suspension return is possible.
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 encode_mcu_gather (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
 {
   huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
@@ -623,7 +663,7 @@ encode_mcu_gather (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
   for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
     ci = cinfo->MCU_membership[blkn];
     compptr = cinfo->cur_comp_info[ci];
-    htest_one_block(MCU_data[blkn][0], entropy->saved.last_dc_val[ci],
+    htest_one_block(cinfo, MCU_data[blkn][0], entropy->saved.last_dc_val[ci],
 		    entropy->dc_count_ptrs[compptr->dc_tbl_no],
 		    entropy->ac_count_ptrs[compptr->ac_tbl_no]);
     entropy->saved.last_dc_val[ci] = MCU_data[blkn][0][0];
@@ -634,11 +674,34 @@ encode_mcu_gather (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
 
 
 /*
- * Generate the optimal coding for the given counts, fill htbl.
+ * Generate the best Huffman code table for the given counts, fill htbl.
  * Note this is also used by jcphuff.c.
+ *
+ * The JPEG standard requires that no symbol be assigned a codeword of all
+ * one bits (so that padding bits added at the end of a compressed segment
+ * can't look like a valid code).  Because of the canonical ordering of
+ * codewords, this just means that there must be an unused slot in the
+ * longest codeword length category.  Section K.2 of the JPEG spec suggests
+ * reserving such a slot by pretending that symbol 256 is a valid symbol
+ * with count 1.  In theory that's not optimal; giving it count zero but
+ * including it in the symbol set anyway should give a better Huffman code.
+ * But the theoretically better code actually seems to come out worse in
+ * practice, because it produces more all-ones bytes (which incur stuffed
+ * zero bytes in the final file).  In any case the difference is tiny.
+ *
+ * The JPEG standard requires Huffman codes to be no more than 16 bits long.
+ * If some symbols have a very small but nonzero probability, the Huffman tree
+ * must be adjusted to meet the code length restriction.  We currently use
+ * the adjustment method suggested in JPEG section K.2.  This method is *not*
+ * optimal; it may not choose the best possible limited-length code.  But
+ * typically only very-low-frequency symbols will be given less-than-optimal
+ * lengths, so the code is almost optimal.  Experimental comparisons against
+ * an optimal limited-length-code algorithm indicate that the difference is
+ * microscopic --- usually less than a hundredth of a percent of total size.
+ * So the extra complexity of an optimal algorithm doesn't seem worthwhile.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_gen_optimal_table (j_compress_ptr cinfo, JHUFF_TBL * htbl, long freq[])
 {
 #define MAX_CLEN 32		/* assumed maximum initial code length */
@@ -656,10 +719,10 @@ jpeg_gen_optimal_table (j_compress_ptr cinfo, JHUFF_TBL * htbl, long freq[])
   for (i = 0; i < 257; i++)
     others[i] = -1;		/* init links to empty */
   
-  freq[256] = 1;		/* make sure there is a nonzero count */
+  freq[256] = 1;		/* make sure 256 has a nonzero count */
   /* Including the pseudo-symbol 256 in the Huffman procedure guarantees
    * that no real symbol is given code-value of all ones, because 256
-   * will be placed in the largest codeword category.
+   * will be placed last in the largest codeword category.
    */
 
   /* Huffman's basic algorithm to assign optimal code lengths to symbols */
@@ -779,7 +842,7 @@ jpeg_gen_optimal_table (j_compress_ptr cinfo, JHUFF_TBL * htbl, long freq[])
  * Finish up a statistics-gathering pass and create the new Huffman tables.
  */
 
-METHODDEF void
+METHODDEF(void)
 finish_pass_gather (j_compress_ptr cinfo)
 {
   huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
@@ -824,7 +887,7 @@ finish_pass_gather (j_compress_ptr cinfo)
  * Module initialization routine for Huffman entropy encoding.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_huff_encoder (j_compress_ptr cinfo)
 {
   huff_entropy_ptr entropy;
diff --git a/code/jpeg-6/jchuff.h b/code/jpeg-6b/jchuff.h
index f43d571..a9599fc 100644
--- a/code/jpeg-6/jchuff.h
+++ b/code/jpeg-6b/jchuff.h
@@ -1,7 +1,7 @@
 /*
  * jchuff.h
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -10,6 +10,18 @@
  * progressive encoder (jcphuff.c).  No other modules need to see these.
  */
 
+/* The legal range of a DCT coefficient is
+ *  -1024 .. +1023  for 8-bit data;
+ * -16384 .. +16383 for 12-bit data.
+ * Hence the magnitude should always fit in 10 or 14 bits respectively.
+ */
+
+#if BITS_IN_JSAMPLE == 8
+#define MAX_COEF_BITS 10
+#else
+#define MAX_COEF_BITS 14
+#endif
+
 /* Derived data constructed for each Huffman table */
 
 typedef struct {
@@ -26,9 +38,10 @@ typedef struct {
 #endif /* NEED_SHORT_EXTERNAL_NAMES */
 
 /* Expand a Huffman table definition into the derived format */
-EXTERN void jpeg_make_c_derived_tbl JPP((j_compress_ptr cinfo,
-				JHUFF_TBL * htbl, c_derived_tbl ** pdtbl));
+EXTERN(void) jpeg_make_c_derived_tbl
+	JPP((j_compress_ptr cinfo, boolean isDC, int tblno,
+	     c_derived_tbl ** pdtbl));
 
 /* Generate an optimal table definition given the specified counts */
-EXTERN void jpeg_gen_optimal_table JPP((j_compress_ptr cinfo,
-					JHUFF_TBL * htbl, long freq[]));
+EXTERN(void) jpeg_gen_optimal_table
+	JPP((j_compress_ptr cinfo, JHUFF_TBL * htbl, long freq[]));
diff --git a/code/jpeg-6/jcinit.c b/code/jpeg-6b/jcinit.c
index 2cc82b2..5efffe3 100644
--- a/code/jpeg-6/jcinit.c
+++ b/code/jpeg-6b/jcinit.c
@@ -1,7 +1,7 @@
 /*
  * jcinit.c
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -26,7 +26,7 @@
  * which modules will be used and give them appropriate initialization calls.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_compress_master (j_compress_ptr cinfo)
 {
   /* Initialize master control (includes parameter checking/processing) */
@@ -56,7 +56,7 @@ jinit_compress_master (j_compress_ptr cinfo)
 
   /* Need a full-image coefficient buffer in any multi-pass mode. */
   jinit_c_coef_controller(cinfo,
-			  (cinfo->num_scans > 1 || cinfo->optimize_coding));
+		(boolean) (cinfo->num_scans > 1 || cinfo->optimize_coding));
   jinit_c_main_controller(cinfo, FALSE /* never need full buffer here */);
 
   jinit_marker_writer(cinfo);
diff --git a/code/jpeg-6/jcmainct.c b/code/jpeg-6b/jcmainct.c
index aa8ba9b..03a61a7 100644
--- a/code/jpeg-6/jcmainct.c
+++ b/code/jpeg-6b/jcmainct.c
@@ -1,7 +1,7 @@
 /*
  * jcmainct.c
  *
- * Copyright (C) 1994-1995, Thomas G. Lane.
+ * Copyright (C) 1994-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -51,11 +51,11 @@ typedef my_main_controller * my_main_ptr;
 
 
 /* Forward declarations */
-METHODDEF void process_data_simple_main
+METHODDEF(void) process_data_simple_main
 	JPP((j_compress_ptr cinfo, JSAMPARRAY input_buf,
 	     JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail));
 #ifdef FULL_MAIN_BUFFER_SUPPORTED
-METHODDEF void process_data_buffer_main
+METHODDEF(void) process_data_buffer_main
 	JPP((j_compress_ptr cinfo, JSAMPARRAY input_buf,
 	     JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail));
 #endif
@@ -65,7 +65,7 @@ METHODDEF void process_data_buffer_main
  * Initialize for a processing pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_main (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
 {
   my_main_ptr jmain = (my_main_ptr) cinfo->main;
@@ -109,7 +109,7 @@ start_pass_main (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
  * where we have only a strip buffer.
  */
 
-METHODDEF void
+METHODDEF(void)
 process_data_simple_main (j_compress_ptr cinfo,
 			  JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
 			  JDIMENSION in_rows_avail)
@@ -117,7 +117,7 @@ process_data_simple_main (j_compress_ptr cinfo,
   my_main_ptr jmain = (my_main_ptr) cinfo->main;
 
   while (jmain->cur_iMCU_row < cinfo->total_iMCU_rows) {
-    /* Read input data if we haven't filled the main buffer yet */
+    /* Read input data if we haven't filled the jmain buffer yet */
     if (jmain->rowgroup_ctr < DCTSIZE)
       (*cinfo->prep->pre_process_data) (cinfo,
 					input_buf, in_row_ctr, in_rows_avail,
@@ -146,7 +146,7 @@ process_data_simple_main (j_compress_ptr cinfo,
       return;
     }
     /* We did finish the row.  Undo our little suspension hack if a previous
-     * call suspended; then mark the main buffer empty.
+     * call suspended; then mark the jmain buffer empty.
      */
     if (jmain->suspended) {
       (*in_row_ctr)++;
@@ -165,30 +165,30 @@ process_data_simple_main (j_compress_ptr cinfo,
  * This routine handles all of the modes that use a full-size buffer.
  */
 
-METHODDEF void
+METHODDEF(void)
 process_data_buffer_main (j_compress_ptr cinfo,
 			  JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
 			  JDIMENSION in_rows_avail)
 {
-  my_main_ptr main = (my_main_ptr) cinfo->main;
+  my_main_ptr jmain = (my_main_ptr) cinfo->main;
   int ci;
   jpeg_component_info *compptr;
-  boolean writing = (main->pass_mode != JBUF_CRANK_DEST);
+  boolean writing = (jmain->pass_mode != JBUF_CRANK_DEST);
 
-  while (main->cur_iMCU_row < cinfo->total_iMCU_rows) {
+  while (jmain->cur_iMCU_row < cinfo->total_iMCU_rows) {
     /* Realign the virtual buffers if at the start of an iMCU row. */
-    if (main->rowgroup_ctr == 0) {
+    if (jmain->rowgroup_ctr == 0) {
       for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
 	   ci++, compptr++) {
-	main->buffer[ci] = (*cinfo->mem->access_virt_sarray)
-	  ((j_common_ptr) cinfo, main->whole_image[ci],
-	   main->cur_iMCU_row * (compptr->v_samp_factor * DCTSIZE),
+	jmain->buffer[ci] = (*cinfo->mem->access_virt_sarray)
+	  ((j_common_ptr) cinfo, jmain->whole_image[ci],
+	   jmain->cur_iMCU_row * (compptr->v_samp_factor * DCTSIZE),
 	   (JDIMENSION) (compptr->v_samp_factor * DCTSIZE), writing);
       }
       /* In a read pass, pretend we just read some source data. */
       if (! writing) {
 	*in_row_ctr += cinfo->max_v_samp_factor * DCTSIZE;
-	main->rowgroup_ctr = DCTSIZE;
+	jmain->rowgroup_ctr = DCTSIZE;
       }
     }
 
@@ -197,40 +197,40 @@ process_data_buffer_main (j_compress_ptr cinfo,
     if (writing) {
       (*cinfo->prep->pre_process_data) (cinfo,
 					input_buf, in_row_ctr, in_rows_avail,
-					main->buffer, &main->rowgroup_ctr,
+					jmain->buffer, &jmain->rowgroup_ctr,
 					(JDIMENSION) DCTSIZE);
       /* Return to application if we need more data to fill the iMCU row. */
-      if (main->rowgroup_ctr < DCTSIZE)
+      if (jmain->rowgroup_ctr < DCTSIZE)
 	return;
     }
 
     /* Emit data, unless this is a sink-only pass. */
-    if (main->pass_mode != JBUF_SAVE_SOURCE) {
-      if (! (*cinfo->coef->compress_data) (cinfo, main->buffer)) {
+    if (jmain->pass_mode != JBUF_SAVE_SOURCE) {
+      if (! (*cinfo->coef->compress_data) (cinfo, jmain->buffer)) {
 	/* If compressor did not consume the whole row, then we must need to
 	 * suspend processing and return to the application.  In this situation
 	 * we pretend we didn't yet consume the last input row; otherwise, if
 	 * it happened to be the last row of the image, the application would
 	 * think we were done.
 	 */
-	if (! main->suspended) {
+	if (! jmain->suspended) {
 	  (*in_row_ctr)--;
-	  main->suspended = TRUE;
+	  jmain->suspended = TRUE;
 	}
 	return;
       }
       /* We did finish the row.  Undo our little suspension hack if a previous
-       * call suspended; then mark the main buffer empty.
+       * call suspended; then mark the jmain buffer empty.
        */
-      if (main->suspended) {
+      if (jmain->suspended) {
 	(*in_row_ctr)++;
-	main->suspended = FALSE;
+	jmain->suspended = FALSE;
       }
     }
 
     /* If get here, we are done with this iMCU row.  Mark buffer empty. */
-    main->rowgroup_ctr = 0;
-    main->cur_iMCU_row++;
+    jmain->rowgroup_ctr = 0;
+    jmain->cur_iMCU_row++;
   }
 }
 
@@ -238,10 +238,10 @@ process_data_buffer_main (j_compress_ptr cinfo,
 
 
 /*
- * Initialize main buffer controller.
+ * Initialize jmain buffer controller.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_c_main_controller (j_compress_ptr cinfo, boolean need_full_buffer)
 {
   my_main_ptr jmain;
diff --git a/code/jpeg-6/jcmarker.c b/code/jpeg-6b/jcmarker.c
index f4d290b..3d1e6c6 100644
--- a/code/jpeg-6/jcmarker.c
+++ b/code/jpeg-6b/jcmarker.c
@@ -1,7 +1,7 @@
 /*
  * jcmarker.c
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1998, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -81,6 +81,17 @@ typedef enum {			/* JPEG marker codes */
 } JPEG_MARKER;
 
 
+/* Private state */
+
+typedef struct {
+  struct jpeg_marker_writer pub; /* public fields */
+
+  unsigned int last_restart_interval; /* last DRI value emitted; 0 after SOI */
+} my_marker_writer;
+
+typedef my_marker_writer * my_marker_ptr;
+
+
 /*
  * Basic output routines.
  *
@@ -93,7 +104,7 @@ typedef enum {			/* JPEG marker codes */
  * points where markers will be written.
  */
 
-LOCAL void
+LOCAL(void)
 emit_byte (j_compress_ptr cinfo, int val)
 /* Emit a byte */
 {
@@ -107,7 +118,7 @@ emit_byte (j_compress_ptr cinfo, int val)
 }
 
 
-LOCAL void
+LOCAL(void)
 emit_marker (j_compress_ptr cinfo, JPEG_MARKER mark)
 /* Emit a marker code */
 {
@@ -116,7 +127,7 @@ emit_marker (j_compress_ptr cinfo, JPEG_MARKER mark)
 }
 
 
-LOCAL void
+LOCAL(void)
 emit_2bytes (j_compress_ptr cinfo, int value)
 /* Emit a 2-byte integer; these are always MSB first in JPEG files */
 {
@@ -129,7 +140,7 @@ emit_2bytes (j_compress_ptr cinfo, int value)
  * Routines to write specific marker types.
  */
 
-LOCAL int
+LOCAL(int)
 emit_dqt (j_compress_ptr cinfo, int index)
 /* Emit a DQT marker */
 /* Returns the precision used (0 = 8bits, 1 = 16bits) for baseline checking */
@@ -155,9 +166,11 @@ emit_dqt (j_compress_ptr cinfo, int index)
     emit_byte(cinfo, index + (prec<<4));
 
     for (i = 0; i < DCTSIZE2; i++) {
+      /* The table entries must be emitted in zigzag order. */
+      unsigned int qval = qtbl->quantval[jpeg_natural_order[i]];
       if (prec)
-	emit_byte(cinfo, qtbl->quantval[i] >> 8);
-      emit_byte(cinfo, qtbl->quantval[i] & 0xFF);
+	emit_byte(cinfo, (int) (qval >> 8));
+      emit_byte(cinfo, (int) (qval & 0xFF));
     }
 
     qtbl->sent_table = TRUE;
@@ -167,7 +180,7 @@ emit_dqt (j_compress_ptr cinfo, int index)
 }
 
 
-LOCAL void
+LOCAL(void)
 emit_dht (j_compress_ptr cinfo, int index, boolean is_ac)
 /* Emit a DHT marker */
 {
@@ -205,7 +218,7 @@ emit_dht (j_compress_ptr cinfo, int index, boolean is_ac)
 }
 
 
-LOCAL void
+LOCAL(void)
 emit_dac (j_compress_ptr cinfo)
 /* Emit a DAC marker */
 /* Since the useful info is so small, we want to emit all the tables in */
@@ -248,7 +261,7 @@ emit_dac (j_compress_ptr cinfo)
 }
 
 
-LOCAL void
+LOCAL(void)
 emit_dri (j_compress_ptr cinfo)
 /* Emit a DRI marker */
 {
@@ -260,7 +273,7 @@ emit_dri (j_compress_ptr cinfo)
 }
 
 
-LOCAL void
+LOCAL(void)
 emit_sof (j_compress_ptr cinfo, JPEG_MARKER code)
 /* Emit a SOF marker */
 {
@@ -291,7 +304,7 @@ emit_sof (j_compress_ptr cinfo, JPEG_MARKER code)
 }
 
 
-LOCAL void
+LOCAL(void)
 emit_sos (j_compress_ptr cinfo)
 /* Emit a SOS marker */
 {
@@ -332,7 +345,7 @@ emit_sos (j_compress_ptr cinfo)
 }
 
 
-LOCAL void
+LOCAL(void)
 emit_jfif_app0 (j_compress_ptr cinfo)
 /* Emit a JFIF-compliant APP0 marker */
 {
@@ -340,7 +353,7 @@ emit_jfif_app0 (j_compress_ptr cinfo)
    * Length of APP0 block	(2 bytes)
    * Block ID			(4 bytes - ASCII "JFIF")
    * Zero byte			(1 byte to terminate the ID string)
-   * Version Major, Minor	(2 bytes - 0x01, 0x01)
+   * Version Major, Minor	(2 bytes - major first)
    * Units			(1 byte - 0x00 = none, 0x01 = inch, 0x02 = cm)
    * Xdpu			(2 bytes - dots per unit horizontal)
    * Ydpu			(2 bytes - dots per unit vertical)
@@ -357,11 +370,8 @@ emit_jfif_app0 (j_compress_ptr cinfo)
   emit_byte(cinfo, 0x49);
   emit_byte(cinfo, 0x46);
   emit_byte(cinfo, 0);
-  /* We currently emit version code 1.01 since we use no 1.02 features.
-   * This may avoid complaints from some older decoders.
-   */
-  emit_byte(cinfo, 1);		/* Major version */
-  emit_byte(cinfo, 1);		/* Minor version */
+  emit_byte(cinfo, cinfo->JFIF_major_version); /* Version fields */
+  emit_byte(cinfo, cinfo->JFIF_minor_version);
   emit_byte(cinfo, cinfo->density_unit); /* Pixel size information */
   emit_2bytes(cinfo, (int) cinfo->X_density);
   emit_2bytes(cinfo, (int) cinfo->Y_density);
@@ -370,7 +380,7 @@ emit_jfif_app0 (j_compress_ptr cinfo)
 }
 
 
-LOCAL void
+LOCAL(void)
 emit_adobe_app14 (j_compress_ptr cinfo)
 /* Emit an Adobe APP14 marker */
 {
@@ -417,28 +427,30 @@ emit_adobe_app14 (j_compress_ptr cinfo)
 
 
 /*
- * This routine is exported for possible use by applications.
- * The intended use is to emit COM or APPn markers after calling
- * jpeg_start_compress() and before the first jpeg_write_scanlines() call
- * (hence, after write_file_header but before write_frame_header).
+ * These routines allow writing an arbitrary marker with parameters.
+ * The only intended use is to emit COM or APPn markers after calling
+ * write_file_header and before calling write_frame_header.
  * Other uses are not guaranteed to produce desirable results.
+ * Counting the parameter bytes properly is the caller's responsibility.
  */
 
-METHODDEF void
-write_any_marker (j_compress_ptr cinfo, int marker,
-		  const JOCTET *dataptr, unsigned int datalen)
-/* Emit an arbitrary marker with parameters */
+METHODDEF(void)
+write_marker_header (j_compress_ptr cinfo, int marker, unsigned int datalen)
+/* Emit an arbitrary marker header */
 {
-  if (datalen <= (unsigned int) 65533) { /* safety check */
-    emit_marker(cinfo, (JPEG_MARKER) marker);
-  
-    emit_2bytes(cinfo, (int) (datalen + 2)); /* total length */
+  if (datalen > (unsigned int) 65533)		/* safety check */
+    ERREXIT(cinfo, JERR_BAD_LENGTH);
 
-    while (datalen--) {
-      emit_byte(cinfo, *dataptr);
-      dataptr++;
-    }
-  }
+  emit_marker(cinfo, (JPEG_MARKER) marker);
+
+  emit_2bytes(cinfo, (int) (datalen + 2));	/* total length */
+}
+
+METHODDEF(void)
+write_marker_byte (j_compress_ptr cinfo, int val)
+/* Emit one byte of marker parameters following write_marker_header */
+{
+  emit_byte(cinfo, val);
 }
 
 
@@ -453,11 +465,16 @@ write_any_marker (j_compress_ptr cinfo, int marker,
  * jpeg_start_compress returns.
  */
 
-METHODDEF void
+METHODDEF(void)
 write_file_header (j_compress_ptr cinfo)
 {
+  my_marker_ptr marker = (my_marker_ptr) cinfo->marker;
+
   emit_marker(cinfo, M_SOI);	/* first the SOI */
 
+  /* SOI is defined to reset restart interval to 0 */
+  marker->last_restart_interval = 0;
+
   if (cinfo->write_JFIF_header)	/* next an optional JFIF APP0 */
     emit_jfif_app0(cinfo);
   if (cinfo->write_Adobe_marker) /* next an optional Adobe APP14 */
@@ -473,7 +490,7 @@ write_file_header (j_compress_ptr cinfo)
  * try to error-check the quant table numbers as soon as they see the SOF.
  */
 
-METHODDEF void
+METHODDEF(void)
 write_frame_header (j_compress_ptr cinfo)
 {
   int ci, prec;
@@ -530,9 +547,10 @@ write_frame_header (j_compress_ptr cinfo)
  * Compressed data will be written following the SOS.
  */
 
-METHODDEF void
+METHODDEF(void)
 write_scan_header (j_compress_ptr cinfo)
 {
+  my_marker_ptr marker = (my_marker_ptr) cinfo->marker;
   int i;
   jpeg_component_info *compptr;
 
@@ -565,11 +583,12 @@ write_scan_header (j_compress_ptr cinfo)
   }
 
   /* Emit DRI if required --- note that DRI value could change for each scan.
-   * If it doesn't, a tiny amount of space is wasted in multiple-scan files.
-   * We assume DRI will never be nonzero for one scan and zero for a later one.
+   * We avoid wasting space with unnecessary DRIs, however.
    */
-  if (cinfo->restart_interval)
+  if (cinfo->restart_interval != marker->last_restart_interval) {
     emit_dri(cinfo);
+    marker->last_restart_interval = cinfo->restart_interval;
+  }
 
   emit_sos(cinfo);
 }
@@ -579,7 +598,7 @@ write_scan_header (j_compress_ptr cinfo)
  * Write datastream trailer.
  */
 
-METHODDEF void
+METHODDEF(void)
 write_file_trailer (j_compress_ptr cinfo)
 {
   emit_marker(cinfo, M_EOI);
@@ -593,7 +612,7 @@ write_file_trailer (j_compress_ptr cinfo)
  * emitted.  Note that all tables will be marked sent_table = TRUE at exit.
  */
 
-METHODDEF void
+METHODDEF(void)
 write_tables_only (j_compress_ptr cinfo)
 {
   int i;
@@ -622,18 +641,24 @@ write_tables_only (j_compress_ptr cinfo)
  * Initialize the marker writer module.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_marker_writer (j_compress_ptr cinfo)
 {
+  my_marker_ptr marker;
+
   /* Create the subobject */
-  cinfo->marker = (struct jpeg_marker_writer *)
+  marker = (my_marker_ptr)
     (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				SIZEOF(struct jpeg_marker_writer));
+				SIZEOF(my_marker_writer));
+  cinfo->marker = (struct jpeg_marker_writer *) marker;
   /* Initialize method pointers */
-  cinfo->marker->write_any_marker = write_any_marker;
-  cinfo->marker->write_file_header = write_file_header;
-  cinfo->marker->write_frame_header = write_frame_header;
-  cinfo->marker->write_scan_header = write_scan_header;
-  cinfo->marker->write_file_trailer = write_file_trailer;
-  cinfo->marker->write_tables_only = write_tables_only;
+  marker->pub.write_file_header = write_file_header;
+  marker->pub.write_frame_header = write_frame_header;
+  marker->pub.write_scan_header = write_scan_header;
+  marker->pub.write_file_trailer = write_file_trailer;
+  marker->pub.write_tables_only = write_tables_only;
+  marker->pub.write_marker_header = write_marker_header;
+  marker->pub.write_marker_byte = write_marker_byte;
+  /* Initialize private state */
+  marker->last_restart_interval = 0;
 }
diff --git a/code/jpeg-6/jcmaster.c b/code/jpeg-6b/jcmaster.c
index 84494e6..aab4020 100644
--- a/code/jpeg-6/jcmaster.c
+++ b/code/jpeg-6b/jcmaster.c
@@ -1,7 +1,7 @@
 /*
  * jcmaster.c
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -42,7 +42,7 @@ typedef my_comp_master * my_master_ptr;
  * Support routines that do various essential calculations.
  */
 
-LOCAL void
+LOCAL(void)
 initial_setup (j_compress_ptr cinfo)
 /* Do computations that are needed before master selection phase */
 {
@@ -126,7 +126,7 @@ initial_setup (j_compress_ptr cinfo)
 
 #ifdef C_MULTISCAN_FILES_SUPPORTED
 
-LOCAL void
+LOCAL(void)
 validate_script (j_compress_ptr cinfo)
 /* Verify that the scan script in cinfo->scan_info[] is valid; also
  * determine whether it uses progressive JPEG, and set cinfo->progressive_mode.
@@ -185,8 +185,20 @@ validate_script (j_compress_ptr cinfo)
     Al = scanptr->Al;
     if (cinfo->progressive_mode) {
 #ifdef C_PROGRESSIVE_SUPPORTED
+      /* The JPEG spec simply gives the ranges 0..13 for Ah and Al, but that
+       * seems wrong: the upper bound ought to depend on data precision.
+       * Perhaps they really meant 0..N+1 for N-bit precision.
+       * Here we allow 0..10 for 8-bit data; Al larger than 10 results in
+       * out-of-range reconstructed DC values during the first DC scan,
+       * which might cause problems for some decoders.
+       */
+#if BITS_IN_JSAMPLE == 8
+#define MAX_AH_AL 10
+#else
+#define MAX_AH_AL 13
+#endif
       if (Ss < 0 || Ss >= DCTSIZE2 || Se < Ss || Se >= DCTSIZE2 ||
-	  Ah < 0 || Ah > 13 || Al < 0 || Al > 13)
+	  Ah < 0 || Ah > MAX_AH_AL || Al < 0 || Al > MAX_AH_AL)
 	ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
       if (Ss == 0) {
 	if (Se != 0)		/* DC and AC together not OK */
@@ -251,7 +263,7 @@ validate_script (j_compress_ptr cinfo)
 #endif /* C_MULTISCAN_FILES_SUPPORTED */
 
 
-LOCAL void
+LOCAL(void)
 select_scan_parameters (j_compress_ptr cinfo)
 /* Set up the scan parameters for the current scan */
 {
@@ -292,7 +304,7 @@ select_scan_parameters (j_compress_ptr cinfo)
 }
 
 
-LOCAL void
+LOCAL(void)
 per_scan_setup (j_compress_ptr cinfo)
 /* Do computations that are needed before processing a JPEG scan */
 /* cinfo->comps_in_scan and cinfo->cur_comp_info[] are already set */
@@ -385,7 +397,7 @@ per_scan_setup (j_compress_ptr cinfo)
  * required.
  */
 
-METHODDEF void
+METHODDEF(void)
 prepare_for_pass (j_compress_ptr cinfo)
 {
   my_master_ptr master = (my_master_ptr) cinfo->master;
@@ -473,7 +485,7 @@ prepare_for_pass (j_compress_ptr cinfo)
  * In multi-pass processing, this routine is not used.
  */
 
-METHODDEF void
+METHODDEF(void)
 pass_startup (j_compress_ptr cinfo)
 {
   cinfo->master->call_pass_startup = FALSE; /* reset flag so call only once */
@@ -487,7 +499,7 @@ pass_startup (j_compress_ptr cinfo)
  * Finish up at end of pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 finish_pass_master (j_compress_ptr cinfo)
 {
   my_master_ptr master = (my_master_ptr) cinfo->master;
@@ -527,7 +539,7 @@ finish_pass_master (j_compress_ptr cinfo)
  * Initialize master compression control.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_c_master_control (j_compress_ptr cinfo, boolean transcode_only)
 {
   my_master_ptr master;
diff --git a/code/jpeg-6/jcomapi.c b/code/jpeg-6b/jcomapi.c
index c10903f..9b1fa75 100644
--- a/code/jpeg-6/jcomapi.c
+++ b/code/jpeg-6b/jcomapi.c
@@ -1,7 +1,7 @@
 /*
  * jcomapi.c
  *
- * Copyright (C) 1994, Thomas G. Lane.
+ * Copyright (C) 1994-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -25,11 +25,15 @@
  * responsibility.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_abort (j_common_ptr cinfo)
 {
   int pool;
 
+  /* Do nothing if called on a not-initialized or destroyed JPEG object. */
+  if (cinfo->mem == NULL)
+    return;
+
   /* Releasing pools in reverse order might help avoid fragmentation
    * with some (brain-damaged) malloc libraries.
    */
@@ -38,7 +42,15 @@ jpeg_abort (j_common_ptr cinfo)
   }
 
   /* Reset overall state for possible reuse of object */
-  cinfo->global_state = (cinfo->is_decompressor ? DSTATE_START : CSTATE_START);
+  if (cinfo->is_decompressor) {
+    cinfo->global_state = DSTATE_START;
+    /* Try to keep application from accessing now-deleted marker list.
+     * A bit kludgy to do it here, but this is the most central place.
+     */
+    ((j_decompress_ptr) cinfo)->marker_list = NULL;
+  } else {
+    cinfo->global_state = CSTATE_START;
+  }
 }
 
 
@@ -53,7 +65,7 @@ jpeg_abort (j_common_ptr cinfo)
  * responsibility.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_destroy (j_common_ptr cinfo)
 {
   /* We need only tell the memory manager to release everything. */
@@ -70,7 +82,7 @@ jpeg_destroy (j_common_ptr cinfo)
  * (Would jutils.c be a more reasonable place to put these?)
  */
 
-GLOBAL JQUANT_TBL *
+GLOBAL(JQUANT_TBL *)
 jpeg_alloc_quant_table (j_common_ptr cinfo)
 {
   JQUANT_TBL *tbl;
@@ -82,7 +94,7 @@ jpeg_alloc_quant_table (j_common_ptr cinfo)
 }
 
 
-GLOBAL JHUFF_TBL *
+GLOBAL(JHUFF_TBL *)
 jpeg_alloc_huff_table (j_common_ptr cinfo)
 {
   JHUFF_TBL *tbl;
diff --git a/code/jpeg-6/jconfig.h b/code/jpeg-6b/jconfig.h
index 361586e..361586e 100644
--- a/code/jpeg-6/jconfig.h
+++ b/code/jpeg-6b/jconfig.h
diff --git a/code/jpeg-6/jcparam.c b/code/jpeg-6b/jcparam.c
index 29862d3..6fc48f5 100644
--- a/code/jpeg-6/jcparam.c
+++ b/code/jpeg-6b/jcparam.c
@@ -1,7 +1,7 @@
 /*
  * jcparam.c
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1998, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -19,7 +19,7 @@
  * Quantization table setup routines
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_add_quant_table (j_compress_ptr cinfo, int which_tbl,
 		      const unsigned int *basic_table,
 		      int scale_factor, boolean force_baseline)
@@ -29,7 +29,7 @@ jpeg_add_quant_table (j_compress_ptr cinfo, int which_tbl,
  * are limited to 1..255 for JPEG baseline compatibility.
  */
 {
-  JQUANT_TBL ** qtblptr = & cinfo->quant_tbl_ptrs[which_tbl];
+  JQUANT_TBL ** qtblptr;
   int i;
   long temp;
 
@@ -37,6 +37,11 @@ jpeg_add_quant_table (j_compress_ptr cinfo, int which_tbl,
   if (cinfo->global_state != CSTATE_START)
     ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
 
+  if (which_tbl < 0 || which_tbl >= NUM_QUANT_TBLS)
+    ERREXIT1(cinfo, JERR_DQT_INDEX, which_tbl);
+
+  qtblptr = & cinfo->quant_tbl_ptrs[which_tbl];
+
   if (*qtblptr == NULL)
     *qtblptr = jpeg_alloc_quant_table((j_common_ptr) cinfo);
 
@@ -55,7 +60,7 @@ jpeg_add_quant_table (j_compress_ptr cinfo, int which_tbl,
 }
 
 
-GLOBAL void
+GLOBAL(void)
 jpeg_set_linear_quality (j_compress_ptr cinfo, int scale_factor,
 			 boolean force_baseline)
 /* Set or change the 'quality' (quantization) setting, using default tables
@@ -64,31 +69,30 @@ jpeg_set_linear_quality (j_compress_ptr cinfo, int scale_factor,
  * applications that insist on a linear percentage scaling.
  */
 {
-  /* This is the sample quantization table given in the JPEG spec section K.1,
-   * but expressed in zigzag order (as are all of our quant. tables).
+  /* These are the sample quantization tables given in JPEG spec section K.1.
    * The spec says that the values given produce "good" quality, and
    * when divided by 2, "very good" quality.
    */
   static const unsigned int std_luminance_quant_tbl[DCTSIZE2] = {
-    16,  11,  12,  14,  12,  10,  16,  14,
-    13,  14,  18,  17,  16,  19,  24,  40,
-    26,  24,  22,  22,  24,  49,  35,  37,
-    29,  40,  58,  51,  61,  60,  57,  51,
-    56,  55,  64,  72,  92,  78,  64,  68,
-    87,  69,  55,  56,  80, 109,  81,  87,
-    95,  98, 103, 104, 103,  62,  77, 113,
-    121, 112, 100, 120,  92, 101, 103,  99
-    };
+    16,  11,  10,  16,  24,  40,  51,  61,
+    12,  12,  14,  19,  26,  58,  60,  55,
+    14,  13,  16,  24,  40,  57,  69,  56,
+    14,  17,  22,  29,  51,  87,  80,  62,
+    18,  22,  37,  56,  68, 109, 103,  77,
+    24,  35,  55,  64,  81, 104, 113,  92,
+    49,  64,  78,  87, 103, 121, 120, 101,
+    72,  92,  95,  98, 112, 100, 103,  99
+  };
   static const unsigned int std_chrominance_quant_tbl[DCTSIZE2] = {
-    17,  18,  18,  24,  21,  24,  47,  26,
-    26,  47,  99,  66,  56,  66,  99,  99,
-    99,  99,  99,  99,  99,  99,  99,  99,
-    99,  99,  99,  99,  99,  99,  99,  99,
+    17,  18,  24,  47,  99,  99,  99,  99,
+    18,  21,  26,  66,  99,  99,  99,  99,
+    24,  26,  56,  99,  99,  99,  99,  99,
+    47,  66,  99,  99,  99,  99,  99,  99,
     99,  99,  99,  99,  99,  99,  99,  99,
     99,  99,  99,  99,  99,  99,  99,  99,
     99,  99,  99,  99,  99,  99,  99,  99,
     99,  99,  99,  99,  99,  99,  99,  99
-    };
+  };
 
   /* Set up two quantization tables using the specified scaling */
   jpeg_add_quant_table(cinfo, 0, std_luminance_quant_tbl,
@@ -98,7 +102,7 @@ jpeg_set_linear_quality (j_compress_ptr cinfo, int scale_factor,
 }
 
 
-GLOBAL int
+GLOBAL(int)
 jpeg_quality_scaling (int quality)
 /* Convert a user-specified quality rating to a percentage scaling factor
  * for an underlying quantization table, using our recommended scaling curve.
@@ -111,8 +115,8 @@ jpeg_quality_scaling (int quality)
 
   /* The basic table is used as-is (scaling 100) for a quality of 50.
    * Qualities 50..100 are converted to scaling percentage 200 - 2*Q;
-   * note that at Q=100 the scaling is 0, which will cause j_add_quant_table
-   * to make all the table entries 1 (hence, no quantization loss).
+   * note that at Q=100 the scaling is 0, which will cause jpeg_add_quant_table
+   * to make all the table entries 1 (hence, minimum quantization loss).
    * Qualities 1..50 are converted to scaling percentage 5000/Q.
    */
   if (quality < 50)
@@ -124,7 +128,7 @@ jpeg_quality_scaling (int quality)
 }
 
 
-GLOBAL void
+GLOBAL(void)
 jpeg_set_quality (j_compress_ptr cinfo, int quality, boolean force_baseline)
 /* Set or change the 'quality' (quantization) setting, using default tables.
  * This is the standard quality-adjusting entry point for typical user
@@ -144,23 +148,37 @@ jpeg_set_quality (j_compress_ptr cinfo, int quality, boolean force_baseline)
  * Huffman table setup routines
  */
 
-LOCAL void
+LOCAL(void)
 add_huff_table (j_compress_ptr cinfo,
 		JHUFF_TBL **htblptr, const UINT8 *bits, const UINT8 *val)
 /* Define a Huffman table */
 {
+  int nsymbols, len;
+
   if (*htblptr == NULL)
     *htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo);
-  
+
+  /* Copy the number-of-symbols-of-each-code-length counts */
   MEMCOPY((*htblptr)->bits, bits, SIZEOF((*htblptr)->bits));
-  MEMCOPY((*htblptr)->huffval, val, SIZEOF((*htblptr)->huffval));
+
+  /* Validate the counts.  We do this here mainly so we can copy the right
+   * number of symbols from the val[] array, without risking marching off
+   * the end of memory.  jchuff.c will do a more thorough test later.
+   */
+  nsymbols = 0;
+  for (len = 1; len <= 16; len++)
+    nsymbols += bits[len];
+  if (nsymbols < 1 || nsymbols > 256)
+    ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
+
+  MEMCOPY((*htblptr)->huffval, val, nsymbols * SIZEOF(UINT8));
 
   /* Initialize sent_table FALSE so table will be written to JPEG file. */
   (*htblptr)->sent_table = FALSE;
 }
 
 
-LOCAL void
+LOCAL(void)
 std_huff_tables (j_compress_ptr cinfo)
 /* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
 /* IMPORTANT: these are only valid for 8-bit data precision! */
@@ -246,7 +264,7 @@ std_huff_tables (j_compress_ptr cinfo)
  * your code will still work (they'll be set to reasonable defaults).
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_set_defaults (j_compress_ptr cinfo)
 {
   int i;
@@ -314,7 +332,15 @@ jpeg_set_defaults (j_compress_ptr cinfo)
 
   /* Fill in default JFIF marker parameters.  Note that whether the marker
    * will actually be written is determined by jpeg_set_colorspace.
+   *
+   * By default, the library emits JFIF version code 1.01.
+   * An application that wants to emit JFIF 1.02 extension markers should set
+   * JFIF_minor_version to 2.  We could probably get away with just defaulting
+   * to 1.02, but there may still be some decoders in use that will complain
+   * about that; saying 1.01 should minimize compatibility problems.
    */
+  cinfo->JFIF_major_version = 1; /* Default JFIF version = 1.01 */
+  cinfo->JFIF_minor_version = 1;
   cinfo->density_unit = 0;	/* Pixel size is unknown by default */
   cinfo->X_density = 1;		/* Pixel aspect ratio is square by default */
   cinfo->Y_density = 1;
@@ -329,7 +355,7 @@ jpeg_set_defaults (j_compress_ptr cinfo)
  * Select an appropriate JPEG colorspace for in_color_space.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_default_colorspace (j_compress_ptr cinfo)
 {
   switch (cinfo->in_color_space) {
@@ -361,7 +387,7 @@ jpeg_default_colorspace (j_compress_ptr cinfo)
  * Set the JPEG colorspace, and choose colorspace-dependent default values.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_set_colorspace (j_compress_ptr cinfo, J_COLOR_SPACE colorspace)
 {
   jpeg_component_info * compptr;
@@ -445,7 +471,7 @@ jpeg_set_colorspace (j_compress_ptr cinfo, J_COLOR_SPACE colorspace)
 
 #ifdef C_PROGRESSIVE_SUPPORTED
 
-LOCAL jpeg_scan_info *
+LOCAL(jpeg_scan_info *)
 fill_a_scan (jpeg_scan_info * scanptr, int ci,
 	     int Ss, int Se, int Ah, int Al)
 /* Support routine: generate one scan for specified component */
@@ -460,7 +486,7 @@ fill_a_scan (jpeg_scan_info * scanptr, int ci,
   return scanptr;
 }
 
-LOCAL jpeg_scan_info *
+LOCAL(jpeg_scan_info *)
 fill_scans (jpeg_scan_info * scanptr, int ncomps,
 	    int Ss, int Se, int Ah, int Al)
 /* Support routine: generate one scan for each component */
@@ -479,7 +505,7 @@ fill_scans (jpeg_scan_info * scanptr, int ncomps,
   return scanptr;
 }
 
-LOCAL jpeg_scan_info *
+LOCAL(jpeg_scan_info *)
 fill_dc_scans (jpeg_scan_info * scanptr, int ncomps, int Ah, int Al)
 /* Support routine: generate interleaved DC scan if possible, else N scans */
 {
@@ -507,7 +533,7 @@ fill_dc_scans (jpeg_scan_info * scanptr, int ncomps, int Ah, int Al)
  * cinfo->num_components and cinfo->jpeg_color_space must be correct.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_simple_progression (j_compress_ptr cinfo)
 {
   int ncomps = cinfo->num_components;
@@ -530,11 +556,20 @@ jpeg_simple_progression (j_compress_ptr cinfo)
       nscans = 2 + 4 * ncomps;	/* 2 DC scans; 4 AC scans per component */
   }
 
-  /* Allocate space for script. */
-  /* We use permanent pool just in case application re-uses script. */
-  scanptr = (jpeg_scan_info *)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
-				nscans * SIZEOF(jpeg_scan_info));
+  /* Allocate space for script.
+   * We need to put it in the permanent pool in case the application performs
+   * multiple compressions without changing the settings.  To avoid a memory
+   * leak if jpeg_simple_progression is called repeatedly for the same JPEG
+   * object, we try to re-use previously allocated space, and we allocate
+   * enough space to handle YCbCr even if initially asked for grayscale.
+   */
+  if (cinfo->script_space == NULL || cinfo->script_space_size < nscans) {
+    cinfo->script_space_size = MAX(nscans, 10);
+    cinfo->script_space = (jpeg_scan_info *)
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
+			cinfo->script_space_size * SIZEOF(jpeg_scan_info));
+  }
+  scanptr = cinfo->script_space;
   cinfo->scan_info = scanptr;
   cinfo->num_scans = nscans;
 
diff --git a/code/jpeg-6/jcphuff.c b/code/jpeg-6b/jcphuff.c
index 922c17c..07f9178 100644
--- a/code/jpeg-6/jcphuff.c
+++ b/code/jpeg-6b/jcphuff.c
@@ -1,7 +1,7 @@
 /*
  * jcphuff.c
  *
- * Copyright (C) 1995, Thomas G. Lane.
+ * Copyright (C) 1995-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -86,23 +86,23 @@ typedef phuff_entropy_encoder * phuff_entropy_ptr;
 #endif
 
 /* Forward declarations */
-METHODDEF boolean encode_mcu_DC_first JPP((j_compress_ptr cinfo,
-					   JBLOCKROW *MCU_data));
-METHODDEF boolean encode_mcu_AC_first JPP((j_compress_ptr cinfo,
-					   JBLOCKROW *MCU_data));
-METHODDEF boolean encode_mcu_DC_refine JPP((j_compress_ptr cinfo,
+METHODDEF(boolean) encode_mcu_DC_first JPP((j_compress_ptr cinfo,
 					    JBLOCKROW *MCU_data));
-METHODDEF boolean encode_mcu_AC_refine JPP((j_compress_ptr cinfo,
+METHODDEF(boolean) encode_mcu_AC_first JPP((j_compress_ptr cinfo,
 					    JBLOCKROW *MCU_data));
-METHODDEF void finish_pass_phuff JPP((j_compress_ptr cinfo));
-METHODDEF void finish_pass_gather_phuff JPP((j_compress_ptr cinfo));
+METHODDEF(boolean) encode_mcu_DC_refine JPP((j_compress_ptr cinfo,
+					     JBLOCKROW *MCU_data));
+METHODDEF(boolean) encode_mcu_AC_refine JPP((j_compress_ptr cinfo,
+					     JBLOCKROW *MCU_data));
+METHODDEF(void) finish_pass_phuff JPP((j_compress_ptr cinfo));
+METHODDEF(void) finish_pass_gather_phuff JPP((j_compress_ptr cinfo));
 
 
 /*
  * Initialize for a Huffman-compressed scan using progressive JPEG.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_phuff (j_compress_ptr cinfo, boolean gather_statistics)
 {  
   phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
@@ -147,22 +147,19 @@ start_pass_phuff (j_compress_ptr cinfo, boolean gather_statistics)
     compptr = cinfo->cur_comp_info[ci];
     /* Initialize DC predictions to 0 */
     entropy->last_dc_val[ci] = 0;
-    /* Make sure requested tables are present */
-    /* (In gather mode, tables need not be allocated yet) */
+    /* Get table index */
     if (is_DC_band) {
       if (cinfo->Ah != 0)	/* DC refinement needs no table */
 	continue;
       tbl = compptr->dc_tbl_no;
-      if (tbl < 0 || tbl >= NUM_HUFF_TBLS ||
-	  (cinfo->dc_huff_tbl_ptrs[tbl] == NULL && !gather_statistics))
-	ERREXIT1(cinfo,JERR_NO_HUFF_TABLE, tbl);
     } else {
       entropy->ac_tbl_no = tbl = compptr->ac_tbl_no;
-      if (tbl < 0 || tbl >= NUM_HUFF_TBLS ||
-          (cinfo->ac_huff_tbl_ptrs[tbl] == NULL && !gather_statistics))
-        ERREXIT1(cinfo,JERR_NO_HUFF_TABLE, tbl);
     }
     if (gather_statistics) {
+      /* Check for invalid table index */
+      /* (make_c_derived_tbl does this in the other path) */
+      if (tbl < 0 || tbl >= NUM_HUFF_TBLS)
+        ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tbl);
       /* Allocate and zero the statistics tables */
       /* Note that jpeg_gen_optimal_table expects 257 entries in each table! */
       if (entropy->count_ptrs[tbl] == NULL)
@@ -171,14 +168,10 @@ start_pass_phuff (j_compress_ptr cinfo, boolean gather_statistics)
 				      257 * SIZEOF(long));
       MEMZERO(entropy->count_ptrs[tbl], 257 * SIZEOF(long));
     } else {
-      /* Compute derived values for Huffman tables */
+      /* Compute derived values for Huffman table */
       /* We may do this more than once for a table, but it's not expensive */
-      if (is_DC_band)
-        jpeg_make_c_derived_tbl(cinfo, cinfo->dc_huff_tbl_ptrs[tbl],
-				& entropy->derived_tbls[tbl]);
-      else
-        jpeg_make_c_derived_tbl(cinfo, cinfo->ac_huff_tbl_ptrs[tbl],
-				& entropy->derived_tbls[tbl]);
+      jpeg_make_c_derived_tbl(cinfo, is_DC_band, tbl,
+			      & entropy->derived_tbls[tbl]);
     }
   }
 
@@ -208,7 +201,7 @@ start_pass_phuff (j_compress_ptr cinfo, boolean gather_statistics)
 	    dump_buffer(entropy); }
 
 
-LOCAL void
+LOCAL(void)
 dump_buffer (phuff_entropy_ptr entropy)
 /* Empty the output buffer; we do not support suspension in this module. */
 {
@@ -231,7 +224,7 @@ dump_buffer (phuff_entropy_ptr entropy)
  */
 
 INLINE
-LOCAL void
+LOCAL(void)
 emit_bits (phuff_entropy_ptr entropy, unsigned int code, int size)
 /* Emit some bits, unless we are in gather mode */
 {
@@ -270,7 +263,7 @@ emit_bits (phuff_entropy_ptr entropy, unsigned int code, int size)
 }
 
 
-LOCAL void
+LOCAL(void)
 flush_bits (phuff_entropy_ptr entropy)
 {
   emit_bits(entropy, 0x7F, 7); /* fill any partial byte with ones */
@@ -284,7 +277,7 @@ flush_bits (phuff_entropy_ptr entropy)
  */
 
 INLINE
-LOCAL void
+LOCAL(void)
 emit_symbol (phuff_entropy_ptr entropy, int tbl_no, int symbol)
 {
   if (entropy->gather_statistics)
@@ -300,7 +293,7 @@ emit_symbol (phuff_entropy_ptr entropy, int tbl_no, int symbol)
  * Emit bits from a correction bit buffer.
  */
 
-LOCAL void
+LOCAL(void)
 emit_buffered_bits (phuff_entropy_ptr entropy, char * bufstart,
 		    unsigned int nbits)
 {
@@ -319,7 +312,7 @@ emit_buffered_bits (phuff_entropy_ptr entropy, char * bufstart,
  * Emit any pending EOBRUN symbol.
  */
 
-LOCAL void
+LOCAL(void)
 emit_eobrun (phuff_entropy_ptr entropy)
 {
   register int temp, nbits;
@@ -329,6 +322,9 @@ emit_eobrun (phuff_entropy_ptr entropy)
     nbits = 0;
     while ((temp >>= 1))
       nbits++;
+    /* safety check: shouldn't happen given limited correction-bit buffer */
+    if (nbits > 14)
+      ERREXIT(entropy->cinfo, JERR_HUFF_MISSING_CODE);
 
     emit_symbol(entropy, entropy->ac_tbl_no, nbits << 4);
     if (nbits)
@@ -347,7 +343,7 @@ emit_eobrun (phuff_entropy_ptr entropy)
  * Emit a restart marker & resynchronize predictions.
  */
 
-LOCAL void
+LOCAL(void)
 emit_restart (phuff_entropy_ptr entropy, int restart_num)
 {
   int ci;
@@ -377,7 +373,7 @@ emit_restart (phuff_entropy_ptr entropy, int restart_num)
  * or first pass of successive approximation).
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 encode_mcu_DC_first (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
 {
   phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
@@ -427,6 +423,11 @@ encode_mcu_DC_first (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
       nbits++;
       temp >>= 1;
     }
+    /* Check for out-of-range coefficient values.
+     * Since we're encoding a difference, the range limit is twice as much.
+     */
+    if (nbits > MAX_COEF_BITS+1)
+      ERREXIT(cinfo, JERR_BAD_DCT_COEF);
     
     /* Count/emit the Huffman-coded symbol for the number of bits */
     emit_symbol(entropy, compptr->dc_tbl_no, nbits);
@@ -459,7 +460,7 @@ encode_mcu_DC_first (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
  * or first pass of successive approximation).
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 encode_mcu_AC_first (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
 {
   phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
@@ -523,6 +524,9 @@ encode_mcu_AC_first (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
     nbits = 1;			/* there must be at least one 1 bit */
     while ((temp >>= 1))
       nbits++;
+    /* Check for out-of-range coefficient values */
+    if (nbits > MAX_COEF_BITS)
+      ERREXIT(cinfo, JERR_BAD_DCT_COEF);
 
     /* Count/emit Huffman symbol for run length / number of bits */
     emit_symbol(entropy, entropy->ac_tbl_no, (r << 4) + nbits);
@@ -563,7 +567,7 @@ encode_mcu_AC_first (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
  * is not very clear on the point.
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 encode_mcu_DC_refine (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
 {
   phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
@@ -610,7 +614,7 @@ encode_mcu_DC_refine (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
  * MCU encoding for AC successive approximation refinement scan.
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 encode_mcu_AC_refine (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
 {
   phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
@@ -738,7 +742,7 @@ encode_mcu_AC_refine (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
  * Finish up at the end of a Huffman-compressed progressive scan.
  */
 
-METHODDEF void
+METHODDEF(void)
 finish_pass_phuff (j_compress_ptr cinfo)
 {   
   phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
@@ -759,7 +763,7 @@ finish_pass_phuff (j_compress_ptr cinfo)
  * Finish up a statistics-gathering pass and create the new Huffman tables.
  */
 
-METHODDEF void
+METHODDEF(void)
 finish_pass_gather_phuff (j_compress_ptr cinfo)
 {
   phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
@@ -806,7 +810,7 @@ finish_pass_gather_phuff (j_compress_ptr cinfo)
  * Module initialization routine for progressive Huffman entropy encoding.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_phuff_encoder (j_compress_ptr cinfo)
 {
   phuff_entropy_ptr entropy;
diff --git a/code/jpeg-6/jcprepct.c b/code/jpeg-6b/jcprepct.c
index 7e60946..fa93333 100644
--- a/code/jpeg-6/jcprepct.c
+++ b/code/jpeg-6b/jcprepct.c
@@ -1,7 +1,7 @@
 /*
  * jcprepct.c
  *
- * Copyright (C) 1994, Thomas G. Lane.
+ * Copyright (C) 1994-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -74,7 +74,7 @@ typedef my_prep_controller * my_prep_ptr;
  * Initialize for a processing pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_prep (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
 {
   my_prep_ptr prep = (my_prep_ptr) cinfo->prep;
@@ -102,7 +102,7 @@ start_pass_prep (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
  * by duplicating the bottom row.
  */
 
-LOCAL void
+LOCAL(void)
 expand_bottom_edge (JSAMPARRAY image_data, JDIMENSION num_cols,
 		    int input_rows, int output_rows)
 {
@@ -124,7 +124,7 @@ expand_bottom_edge (JSAMPARRAY image_data, JDIMENSION num_cols,
  * input rows.
  */
 
-METHODDEF void
+METHODDEF(void)
 pre_process_data (j_compress_ptr cinfo,
 		  JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
 		  JDIMENSION in_rows_avail,
@@ -191,7 +191,7 @@ pre_process_data (j_compress_ptr cinfo,
  * Process some data in the context case.
  */
 
-METHODDEF void
+METHODDEF(void)
 pre_process_context (j_compress_ptr cinfo,
 		     JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
 		     JDIMENSION in_rows_avail,
@@ -202,7 +202,6 @@ pre_process_context (j_compress_ptr cinfo,
   int numrows, ci;
   int buf_height = cinfo->max_v_samp_factor * 3;
   JDIMENSION inrows;
-  jpeg_component_info * compptr;
 
   while (*out_row_group_ctr < out_row_groups_avail) {
     if (*in_row_ctr < in_rows_avail) {
@@ -232,15 +231,14 @@ pre_process_context (j_compress_ptr cinfo,
       /* Return for more data, unless we are at the bottom of the image. */
       if (prep->rows_to_go != 0)
 	break;
-    }
-    /* If at bottom of image, pad to fill the conversion buffer. */
-    if (prep->rows_to_go == 0 &&
-	prep->next_buf_row < prep->next_buf_stop) {
-      for (ci = 0; ci < cinfo->num_components; ci++) {
-	expand_bottom_edge(prep->color_buf[ci], cinfo->image_width,
-			   prep->next_buf_row, prep->next_buf_stop);
+      /* When at bottom of image, pad to fill the conversion buffer. */
+      if (prep->next_buf_row < prep->next_buf_stop) {
+	for (ci = 0; ci < cinfo->num_components; ci++) {
+	  expand_bottom_edge(prep->color_buf[ci], cinfo->image_width,
+			     prep->next_buf_row, prep->next_buf_stop);
+	}
+	prep->next_buf_row = prep->next_buf_stop;
       }
-      prep->next_buf_row = prep->next_buf_stop;
     }
     /* If we've gotten enough data, downsample a row group. */
     if (prep->next_buf_row == prep->next_buf_stop) {
@@ -257,21 +255,6 @@ pre_process_context (j_compress_ptr cinfo,
 	prep->next_buf_row = 0;
       prep->next_buf_stop = prep->next_buf_row + cinfo->max_v_samp_factor;
     }
-    /* If at bottom of image, pad the output to a full iMCU height.
-     * Note we assume the caller is providing a one-iMCU-height output buffer!
-     */
-    if (prep->rows_to_go == 0 &&
-	*out_row_group_ctr < out_row_groups_avail) {
-      for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-	   ci++, compptr++) {
-	expand_bottom_edge(output_buf[ci],
-			   compptr->width_in_blocks * DCTSIZE,
-			   (int) (*out_row_group_ctr * compptr->v_samp_factor),
-			   (int) (out_row_groups_avail * compptr->v_samp_factor));
-      }
-      *out_row_group_ctr = out_row_groups_avail;
-      break;			/* can exit outer loop without test */
-    }
   }
 }
 
@@ -280,7 +263,7 @@ pre_process_context (j_compress_ptr cinfo,
  * Create the wrapped-around downsampling input buffer needed for context mode.
  */
 
-LOCAL void
+LOCAL(void)
 create_context_buffer (j_compress_ptr cinfo)
 {
   my_prep_ptr prep = (my_prep_ptr) cinfo->prep;
@@ -328,7 +311,7 @@ create_context_buffer (j_compress_ptr cinfo)
  * Initialize preprocessing controller.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_c_prep_controller (j_compress_ptr cinfo, boolean need_full_buffer)
 {
   my_prep_ptr prep;
diff --git a/code/jpeg-6/jcsample.c b/code/jpeg-6b/jcsample.c
index bf0fb46..212ec87 100644
--- a/code/jpeg-6/jcsample.c
+++ b/code/jpeg-6b/jcsample.c
@@ -1,7 +1,7 @@
 /*
  * jcsample.c
  *
- * Copyright (C) 1991-1994, Thomas G. Lane.
+ * Copyright (C) 1991-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -71,7 +71,7 @@ typedef my_downsampler * my_downsample_ptr;
  * Initialize for a downsampling pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_downsample (j_compress_ptr cinfo)
 {
   /* no work for now */
@@ -83,7 +83,7 @@ start_pass_downsample (j_compress_ptr cinfo)
  * by duplicating the rightmost samples.
  */
 
-LOCAL void
+LOCAL(void)
 expand_right_edge (JSAMPARRAY image_data, int num_rows,
 		   JDIMENSION input_cols, JDIMENSION output_cols)
 {
@@ -110,7 +110,7 @@ expand_right_edge (JSAMPARRAY image_data, int num_rows,
  * In this version we simply downsample each component independently.
  */
 
-METHODDEF void
+METHODDEF(void)
 sep_downsample (j_compress_ptr cinfo,
 		JSAMPIMAGE input_buf, JDIMENSION in_row_index,
 		JSAMPIMAGE output_buf, JDIMENSION out_row_group_index)
@@ -136,7 +136,7 @@ sep_downsample (j_compress_ptr cinfo,
  * Note that this version is not actually used for customary sampling ratios.
  */
 
-METHODDEF void
+METHODDEF(void)
 int_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
 		JSAMPARRAY input_data, JSAMPARRAY output_data)
 {
@@ -183,7 +183,7 @@ int_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
  * without smoothing.
  */
 
-METHODDEF void
+METHODDEF(void)
 fullsize_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
 		     JSAMPARRAY input_data, JSAMPARRAY output_data)
 {
@@ -208,7 +208,7 @@ fullsize_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
  * alternate pixel locations (a simple ordered dither pattern).
  */
 
-METHODDEF void
+METHODDEF(void)
 h2v1_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
 		 JSAMPARRAY input_data, JSAMPARRAY output_data)
 {
@@ -245,7 +245,7 @@ h2v1_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
  * without smoothing.
  */
 
-METHODDEF void
+METHODDEF(void)
 h2v2_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
 		 JSAMPARRAY input_data, JSAMPARRAY output_data)
 {
@@ -288,7 +288,7 @@ h2v2_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
  * with smoothing.  One row of context is required.
  */
 
-METHODDEF void
+METHODDEF(void)
 h2v2_smooth_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
 			JSAMPARRAY input_data, JSAMPARRAY output_data)
 {
@@ -388,7 +388,7 @@ h2v2_smooth_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
  * with smoothing.  One row of context is required.
  */
 
-METHODDEF void
+METHODDEF(void)
 fullsize_smooth_downsample (j_compress_ptr cinfo, jpeg_component_info *compptr,
 			    JSAMPARRAY input_data, JSAMPARRAY output_data)
 {
@@ -460,7 +460,7 @@ fullsize_smooth_downsample (j_compress_ptr cinfo, jpeg_component_info *compptr,
  * Note that we must select a routine for each component.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_downsampler (j_compress_ptr cinfo)
 {
   my_downsample_ptr downsample;
diff --git a/code/jpeg-6/jctrans.c b/code/jpeg-6b/jctrans.c
index 8fc53b1..0e6d707 100644
--- a/code/jpeg-6/jctrans.c
+++ b/code/jpeg-6b/jctrans.c
@@ -1,7 +1,7 @@
 /*
  * jctrans.c
  *
- * Copyright (C) 1995, Thomas G. Lane.
+ * Copyright (C) 1995-1998, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -16,9 +16,9 @@
 
 
 /* Forward declarations */
-LOCAL void transencode_master_selection
+LOCAL(void) transencode_master_selection
 	JPP((j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays));
-LOCAL void transencode_coef_controller
+LOCAL(void) transencode_coef_controller
 	JPP((j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays));
 
 
@@ -34,7 +34,7 @@ LOCAL void transencode_coef_controller
  * typically will be realized during this routine and filled afterwards.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_write_coefficients (j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays)
 {
   if (cinfo->global_state != CSTATE_START)
@@ -59,7 +59,7 @@ jpeg_write_coefficients (j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays)
  * scan script and Huffman optimization) are left in their default states.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_copy_critical_parameters (j_decompress_ptr srcinfo,
 			       j_compress_ptr dstinfo)
 {
@@ -129,6 +129,23 @@ jpeg_copy_critical_parameters (j_decompress_ptr srcinfo,
      * instead we rely on jpeg_set_colorspace to have made a suitable choice.
      */
   }
+  /* Also copy JFIF version and resolution information, if available.
+   * Strictly speaking this isn't "critical" info, but it's nearly
+   * always appropriate to copy it if available.  In particular,
+   * if the application chooses to copy JFIF 1.02 extension markers from
+   * the source file, we need to copy the version to make sure we don't
+   * emit a file that has 1.02 extensions but a claimed version of 1.01.
+   * We will *not*, however, copy version info from mislabeled "2.01" files.
+   */
+  if (srcinfo->saw_JFIF_marker) {
+    if (srcinfo->JFIF_major_version == 1) {
+      dstinfo->JFIF_major_version = srcinfo->JFIF_major_version;
+      dstinfo->JFIF_minor_version = srcinfo->JFIF_minor_version;
+    }
+    dstinfo->density_unit = srcinfo->density_unit;
+    dstinfo->X_density = srcinfo->X_density;
+    dstinfo->Y_density = srcinfo->Y_density;
+  }
 }
 
 
@@ -137,7 +154,7 @@ jpeg_copy_critical_parameters (j_decompress_ptr srcinfo,
  * This substitutes for jcinit.c's initialization of the full compressor.
  */
 
-LOCAL void
+LOCAL(void)
 transencode_master_selection (j_compress_ptr cinfo,
 			      jvirt_barray_ptr * coef_arrays)
 {
@@ -170,7 +187,7 @@ transencode_master_selection (j_compress_ptr cinfo,
   /* We can now tell the memory manager to allocate virtual arrays. */
   (*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
 
-  /* Write the datastream header (SOI) immediately.
+  /* Write the datastream header (SOI, JFIF) immediately.
    * Frame and scan headers are postponed till later.
    * This lets application insert special markers after the SOI.
    */
@@ -206,7 +223,7 @@ typedef struct {
 typedef my_coef_controller * my_coef_ptr;
 
 
-LOCAL void
+LOCAL(void)
 start_iMCU_row (j_compress_ptr cinfo)
 /* Reset within-iMCU-row counters for a new row */
 {
@@ -234,7 +251,7 @@ start_iMCU_row (j_compress_ptr cinfo)
  * Initialize for a processing pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_coef (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
 {
   my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
@@ -257,7 +274,7 @@ start_pass_coef (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
  * NB: input_buf is ignored; it is likely to be a NULL pointer.
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 compress_output (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
 {
   my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
@@ -342,7 +359,7 @@ compress_output (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
  * with unitheight at least v_samp_factor.
  */
 
-LOCAL void
+LOCAL(void)
 transencode_coef_controller (j_compress_ptr cinfo,
 			     jvirt_barray_ptr * coef_arrays)
 {
diff --git a/code/jpeg-6/jdapimin.c b/code/jpeg-6b/jdapimin.c
index d568187..cadb59f 100644
--- a/code/jpeg-6/jdapimin.c
+++ b/code/jpeg-6b/jdapimin.c
@@ -1,7 +1,7 @@
 /*
  * jdapimin.c
  *
- * Copyright (C) 1994-1995, Thomas G. Lane.
+ * Copyright (C) 1994-1998, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -26,18 +26,31 @@
  * The error manager must already be set up (in case memory manager fails).
  */
 
-GLOBAL void
-jpeg_create_decompress (j_decompress_ptr cinfo)
+GLOBAL(void)
+jpeg_CreateDecompress (j_decompress_ptr cinfo, int version, size_t structsize)
 {
   int i;
 
-  /* For debugging purposes, zero the whole master structure.
-   * But error manager pointer is already there, so save and restore it.
+  /* Guard against version mismatches between library and caller. */
+  cinfo->mem = NULL;		/* so jpeg_destroy knows mem mgr not called */
+  if (version != JPEG_LIB_VERSION)
+    ERREXIT2(cinfo, JERR_BAD_LIB_VERSION, JPEG_LIB_VERSION, version);
+  if (structsize != SIZEOF(struct jpeg_decompress_struct))
+    ERREXIT2(cinfo, JERR_BAD_STRUCT_SIZE, 
+	     (int) SIZEOF(struct jpeg_decompress_struct), (int) structsize);
+
+  /* For debugging purposes, we zero the whole master structure.
+   * But the application has already set the err pointer, and may have set
+   * client_data, so we have to save and restore those fields.
+   * Note: if application hasn't set client_data, tools like Purify may
+   * complain here.
    */
   {
     struct jpeg_error_mgr * err = cinfo->err;
+    void * client_data = cinfo->client_data; /* ignore Purify complaint here */
     MEMZERO(cinfo, SIZEOF(struct jpeg_decompress_struct));
     cinfo->err = err;
+    cinfo->client_data = client_data;
   }
   cinfo->is_decompressor = TRUE;
 
@@ -59,6 +72,7 @@ jpeg_create_decompress (j_decompress_ptr cinfo)
   /* Initialize marker processor so application can override methods
    * for COM, APPn markers before calling jpeg_read_header.
    */
+  cinfo->marker_list = NULL;
   jinit_marker_reader(cinfo);
 
   /* And initialize the overall input controller. */
@@ -73,7 +87,7 @@ jpeg_create_decompress (j_decompress_ptr cinfo)
  * Destruction of a JPEG decompression object
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_destroy_decompress (j_decompress_ptr cinfo)
 {
   jpeg_destroy((j_common_ptr) cinfo); /* use common routine */
@@ -85,7 +99,7 @@ jpeg_destroy_decompress (j_decompress_ptr cinfo)
  * but don't destroy the object itself.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_abort_decompress (j_decompress_ptr cinfo)
 {
   jpeg_abort((j_common_ptr) cinfo); /* use common routine */
@@ -93,27 +107,10 @@ jpeg_abort_decompress (j_decompress_ptr cinfo)
 
 
 /*
- * Install a special processing method for COM or APPn markers.
- */
-
-GLOBAL void
-jpeg_set_marker_processor (j_decompress_ptr cinfo, int marker_code,
-			   jpeg_marker_parser_method routine)
-{
-  if (marker_code == JPEG_COM)
-    cinfo->marker->process_COM = routine;
-  else if (marker_code >= JPEG_APP0 && marker_code <= JPEG_APP0+15)
-    cinfo->marker->process_APPn[marker_code-JPEG_APP0] = routine;
-  else
-    ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, marker_code);
-}
-
-
-/*
  * Set default decompression parameters.
  */
 
-LOCAL void
+LOCAL(void)
 default_decompress_parms (j_decompress_ptr cinfo)
 {
   /* Guess the input colorspace, and set output colorspace accordingly. */
@@ -240,7 +237,7 @@ default_decompress_parms (j_decompress_ptr cinfo)
  * extra error checking.
  */
 
-GLOBAL int
+GLOBAL(int)
 jpeg_read_header (j_decompress_ptr cinfo, boolean require_image)
 {
   int retcode;
@@ -286,7 +283,7 @@ jpeg_read_header (j_decompress_ptr cinfo, boolean require_image)
  * method.
  */
 
-GLOBAL int
+GLOBAL(int)
 jpeg_consume_input (j_decompress_ptr cinfo)
 {
   int retcode = JPEG_SUSPENDED;
@@ -333,7 +330,7 @@ jpeg_consume_input (j_decompress_ptr cinfo)
  * Have we finished reading the input file?
  */
 
-GLOBAL boolean
+GLOBAL(boolean)
 jpeg_input_complete (j_decompress_ptr cinfo)
 {
   /* Check for valid jpeg object */
@@ -348,7 +345,7 @@ jpeg_input_complete (j_decompress_ptr cinfo)
  * Is there more than one scan?
  */
 
-GLOBAL boolean
+GLOBAL(boolean)
 jpeg_has_multiple_scans (j_decompress_ptr cinfo)
 {
   /* Only valid after jpeg_read_header completes */
@@ -368,7 +365,7 @@ jpeg_has_multiple_scans (j_decompress_ptr cinfo)
  * a suspending data source is used.
  */
 
-GLOBAL boolean
+GLOBAL(boolean)
 jpeg_finish_decompress (j_decompress_ptr cinfo)
 {
   if ((cinfo->global_state == DSTATE_SCANNING ||
diff --git a/code/jpeg-6/jdapistd.c b/code/jpeg-6b/jdapistd.c
index e36f25c..c8e3fa0 100644
--- a/code/jpeg-6/jdapistd.c
+++ b/code/jpeg-6b/jdapistd.c
@@ -1,7 +1,7 @@
 /*
  * jdapistd.c
  *
- * Copyright (C) 1994-1995, Thomas G. Lane.
+ * Copyright (C) 1994-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -20,7 +20,7 @@
 
 
 /* Forward declarations */
-LOCAL boolean output_pass_setup JPP((j_decompress_ptr cinfo));
+LOCAL(boolean) output_pass_setup JPP((j_decompress_ptr cinfo));
 
 
 /*
@@ -34,7 +34,7 @@ LOCAL boolean output_pass_setup JPP((j_decompress_ptr cinfo));
  * a suspending data source is used.
  */
 
-GLOBAL boolean
+GLOBAL(boolean)
 jpeg_start_decompress (j_decompress_ptr cinfo)
 {
   if (cinfo->global_state == DSTATE_READY) {
@@ -91,7 +91,7 @@ jpeg_start_decompress (j_decompress_ptr cinfo)
  *       If suspended, returns FALSE and sets global_state = DSTATE_PRESCAN.
  */
 
-LOCAL boolean
+LOCAL(boolean)
 output_pass_setup (j_decompress_ptr cinfo)
 {
   if (cinfo->global_state != DSTATE_PRESCAN) {
@@ -148,7 +148,7 @@ output_pass_setup (j_decompress_ptr cinfo)
  * an oversize buffer (max_lines > scanlines remaining) is not an error.
  */
 
-GLOBAL JDIMENSION
+GLOBAL(JDIMENSION)
 jpeg_read_scanlines (j_decompress_ptr cinfo, JSAMPARRAY scanlines,
 		     JDIMENSION max_lines)
 {
@@ -181,7 +181,7 @@ jpeg_read_scanlines (j_decompress_ptr cinfo, JSAMPARRAY scanlines,
  * Processes exactly one iMCU row per call, unless suspended.
  */
 
-GLOBAL JDIMENSION
+GLOBAL(JDIMENSION)
 jpeg_read_raw_data (j_decompress_ptr cinfo, JSAMPIMAGE data,
 		    JDIMENSION max_lines)
 {
@@ -224,7 +224,7 @@ jpeg_read_raw_data (j_decompress_ptr cinfo, JSAMPIMAGE data,
  * Initialize for an output pass in buffered-image mode.
  */
 
-GLOBAL boolean
+GLOBAL(boolean)
 jpeg_start_output (j_decompress_ptr cinfo, int scan_number)
 {
   if (cinfo->global_state != DSTATE_BUFIMAGE &&
@@ -249,7 +249,7 @@ jpeg_start_output (j_decompress_ptr cinfo, int scan_number)
  * a suspending data source is used.
  */
 
-GLOBAL boolean
+GLOBAL(boolean)
 jpeg_finish_output (j_decompress_ptr cinfo)
 {
   if ((cinfo->global_state == DSTATE_SCANNING ||
diff --git a/code/jpeg-6/jdatadst.c b/code/jpeg-6b/jdatadst.c
index 08c4daf..a8f6fb0 100644
--- a/code/jpeg-6/jdatadst.c
+++ b/code/jpeg-6b/jdatadst.c
@@ -1,7 +1,7 @@
 /*
  * jdatadst.c
  *
- * Copyright (C) 1994, Thomas G. Lane.
+ * Copyright (C) 1994-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -39,7 +39,7 @@ typedef my_destination_mgr * my_dest_ptr;
  * before any data is actually written.
  */
 
-METHODDEF void
+METHODDEF(void)
 init_destination (j_compress_ptr cinfo)
 {
   my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
@@ -77,7 +77,7 @@ init_destination (j_compress_ptr cinfo)
  * write it out when emptying the buffer externally.
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 empty_output_buffer (j_compress_ptr cinfo)
 {
   my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
@@ -102,7 +102,7 @@ empty_output_buffer (j_compress_ptr cinfo)
  * for error exit.
  */
 
-METHODDEF void
+METHODDEF(void)
 term_destination (j_compress_ptr cinfo)
 {
   my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
@@ -126,7 +126,7 @@ term_destination (j_compress_ptr cinfo)
  * for closing it after finishing compression.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_stdio_dest (j_compress_ptr cinfo, FILE * outfile)
 {
   my_dest_ptr dest;
diff --git a/code/jpeg-6/jdatasrc.c b/code/jpeg-6b/jdatasrc.c
index b19d885..795f65e 100644
--- a/code/jpeg-6/jdatasrc.c
+++ b/code/jpeg-6b/jdatasrc.c
@@ -1,7 +1,7 @@
 /*
  * jdatasrc.c
  *
- * Copyright (C) 1994, Thomas G. Lane.
+ * Copyright (C) 1994-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -14,7 +14,6 @@
  * than 8 bits on your machine, you may need to do some tweaking.
  */
 
-
 /* this is not a core library module, so it doesn't define JPEG_INTERNALS */
 #include "jinclude.h"
 #include "jpeglib.h"
@@ -24,7 +23,6 @@
 #define MIN(a, b) ((a)<(b)?(a):(b))
 #endif
 
-
 /* Expanded data source object for stdio input */
 
 typedef struct {
@@ -46,7 +44,7 @@ typedef my_source_mgr * my_src_ptr;
  * before any data is actually read.
  */
 
-METHODDEF void
+METHODDEF(void)
 init_source (j_decompress_ptr cinfo)
 {
   my_src_ptr src = (my_src_ptr) cinfo->src;
@@ -92,22 +90,19 @@ init_source (j_decompress_ptr cinfo)
  * the front of the buffer rather than discarding it.
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 fill_input_buffer (j_decompress_ptr cinfo)
 {
   my_src_ptr src = (my_src_ptr) cinfo->src;
   size_t nbytes = MIN(src->inbufbytes, INPUT_BUF_SIZE);
 
-  if(!nbytes)
-  {
+  if (nbytes <= 0) {
     WARNMS(cinfo, JWRN_JPEG_EOF);
     /* Insert a fake EOI marker */
     src->buffer[0] = (JOCTET) 0xFF;
     src->buffer[1] = (JOCTET) JPEG_EOI;
     nbytes = 2;
-  }
-  else
-  {
+  } else {
     memcpy( src->buffer, src->inbuf, nbytes);
 
     src->inbuf += nbytes;
@@ -134,7 +129,7 @@ fill_input_buffer (j_decompress_ptr cinfo)
  * buffer is the application writer's problem.
  */
 
-METHODDEF void
+METHODDEF(void)
 skip_input_data (j_decompress_ptr cinfo, long num_bytes)
 {
   my_src_ptr src = (my_src_ptr) cinfo->src;
@@ -175,7 +170,7 @@ skip_input_data (j_decompress_ptr cinfo, long num_bytes)
  * for error exit.
  */
 
-METHODDEF void
+METHODDEF(void)
 term_source (j_decompress_ptr cinfo)
 {
   /* no work necessary here */
@@ -188,7 +183,7 @@ term_source (j_decompress_ptr cinfo)
  * for closing it after finishing decompression.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_mem_src (j_decompress_ptr cinfo, unsigned char *inbuf, size_t size)
 {
   my_src_ptr src;
diff --git a/code/jpeg-6/jdcoefct.c b/code/jpeg-6b/jdcoefct.c
index ba153f5..4938d20 100644
--- a/code/jpeg-6/jdcoefct.c
+++ b/code/jpeg-6b/jdcoefct.c
@@ -1,7 +1,7 @@
 /*
  * jdcoefct.c
  *
- * Copyright (C) 1994-1995, Thomas G. Lane.
+ * Copyright (C) 1994-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -62,20 +62,20 @@ typedef struct {
 typedef my_coef_controller * my_coef_ptr;
 
 /* Forward declarations */
-METHODDEF int decompress_onepass
+METHODDEF(int) decompress_onepass
 	JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf));
 #ifdef D_MULTISCAN_FILES_SUPPORTED
-METHODDEF int decompress_data
+METHODDEF(int) decompress_data
 	JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf));
 #endif
 #ifdef BLOCK_SMOOTHING_SUPPORTED
-LOCAL boolean smoothing_ok JPP((j_decompress_ptr cinfo));
-METHODDEF int decompress_smooth_data
+LOCAL(boolean) smoothing_ok JPP((j_decompress_ptr cinfo));
+METHODDEF(int) decompress_smooth_data
 	JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf));
 #endif
 
 
-LOCAL void
+LOCAL(void)
 start_iMCU_row (j_decompress_ptr cinfo)
 /* Reset within-iMCU-row counters for a new row (input side) */
 {
@@ -103,7 +103,7 @@ start_iMCU_row (j_decompress_ptr cinfo)
  * Initialize for an input processing pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_input_pass (j_decompress_ptr cinfo)
 {
   cinfo->input_iMCU_row = 0;
@@ -115,7 +115,7 @@ start_input_pass (j_decompress_ptr cinfo)
  * Initialize for an output processing pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_output_pass (j_decompress_ptr cinfo)
 {
 #ifdef BLOCK_SMOOTHING_SUPPORTED
@@ -139,11 +139,11 @@ start_output_pass (j_decompress_ptr cinfo)
  * Input and output must run in lockstep since we have only a one-MCU buffer.
  * Return value is JPEG_ROW_COMPLETED, JPEG_SCAN_COMPLETED, or JPEG_SUSPENDED.
  *
- * NB: output_buf contains a plane for each component in image.
- * For single pass, this is the same as the components in the scan.
+ * NB: output_buf contains a plane for each component in image,
+ * which we index according to the component's SOF position.
  */
 
-METHODDEF int
+METHODDEF(int)
 decompress_onepass (j_decompress_ptr cinfo, JSAMPIMAGE output_buf)
 {
   my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
@@ -186,7 +186,8 @@ decompress_onepass (j_decompress_ptr cinfo, JSAMPIMAGE output_buf)
 	inverse_DCT = cinfo->idct->inverse_DCT[compptr->component_index];
 	useful_width = (MCU_col_num < last_MCU_col) ? compptr->MCU_width
 						    : compptr->last_col_width;
-	output_ptr = output_buf[ci] + yoffset * compptr->DCT_scaled_size;
+	output_ptr = output_buf[compptr->component_index] +
+	  yoffset * compptr->DCT_scaled_size;
 	start_col = MCU_col_num * compptr->MCU_sample_width;
 	for (yindex = 0; yindex < compptr->MCU_height; yindex++) {
 	  if (cinfo->input_iMCU_row < last_iMCU_row ||
@@ -223,7 +224,7 @@ decompress_onepass (j_decompress_ptr cinfo, JSAMPIMAGE output_buf)
  * Dummy consume-input routine for single-pass operation.
  */
 
-METHODDEF int
+METHODDEF(int)
 dummy_consume_data (j_decompress_ptr cinfo)
 {
   return JPEG_SUSPENDED;	/* Always indicate nothing was done */
@@ -239,7 +240,7 @@ dummy_consume_data (j_decompress_ptr cinfo)
  * Return value is JPEG_ROW_COMPLETED, JPEG_SCAN_COMPLETED, or JPEG_SUSPENDED.
  */
 
-METHODDEF int
+METHODDEF(int)
 consume_data (j_decompress_ptr cinfo)
 {
   my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
@@ -310,7 +311,7 @@ consume_data (j_decompress_ptr cinfo)
  * NB: output_buf contains a plane for each component in image.
  */
 
-METHODDEF int
+METHODDEF(int)
 decompress_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf)
 {
   my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
@@ -385,6 +386,13 @@ decompress_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf)
  * the coefficients it can estimate are not yet known to full precision.
  */
 
+/* Natural-order array positions of the first 5 zigzag-order coefficients */
+#define Q01_POS  1
+#define Q10_POS  8
+#define Q20_POS  16
+#define Q11_POS  9
+#define Q02_POS  2
+
 /*
  * Determine whether block smoothing is applicable and safe.
  * We also latch the current states of the coef_bits[] entries for the
@@ -393,7 +401,7 @@ decompress_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf)
  * more accurately than they really are.
  */
 
-LOCAL boolean
+LOCAL(boolean)
 smoothing_ok (j_decompress_ptr cinfo)
 {
   my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
@@ -421,10 +429,13 @@ smoothing_ok (j_decompress_ptr cinfo)
     if ((qtable = compptr->quant_table) == NULL)
       return FALSE;
     /* Verify DC & first 5 AC quantizers are nonzero to avoid zero-divide. */
-    for (coefi = 0; coefi <= 5; coefi++) {
-      if (qtable->quantval[coefi] == 0)
-	return FALSE;
-    }
+    if (qtable->quantval[0] == 0 ||
+	qtable->quantval[Q01_POS] == 0 ||
+	qtable->quantval[Q10_POS] == 0 ||
+	qtable->quantval[Q20_POS] == 0 ||
+	qtable->quantval[Q11_POS] == 0 ||
+	qtable->quantval[Q02_POS] == 0)
+      return FALSE;
     /* DC values must be at least partly known for all components. */
     coef_bits = cinfo->coef_bits[ci];
     if (coef_bits[0] < 0)
@@ -446,7 +457,7 @@ smoothing_ok (j_decompress_ptr cinfo)
  * Variant of decompress_data for use when doing block smoothing.
  */
 
-METHODDEF int
+METHODDEF(int)
 decompress_smooth_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf)
 {
   my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
@@ -521,11 +532,11 @@ decompress_smooth_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf)
     coef_bits = coef->coef_bits_latch + (ci * SAVED_COEFS);
     quanttbl = compptr->quant_table;
     Q00 = quanttbl->quantval[0];
-    Q01 = quanttbl->quantval[1];
-    Q10 = quanttbl->quantval[2];
-    Q20 = quanttbl->quantval[3];
-    Q11 = quanttbl->quantval[4];
-    Q02 = quanttbl->quantval[5];
+    Q01 = quanttbl->quantval[Q01_POS];
+    Q10 = quanttbl->quantval[Q10_POS];
+    Q20 = quanttbl->quantval[Q20_POS];
+    Q11 = quanttbl->quantval[Q11_POS];
+    Q02 = quanttbl->quantval[Q02_POS];
     inverse_DCT = cinfo->idct->inverse_DCT[ci];
     output_ptr = output_buf[ci];
     /* Loop over all DCT blocks to be processed. */
@@ -661,7 +672,7 @@ decompress_smooth_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf)
  * Initialize coefficient buffer controller.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_d_coef_controller (j_decompress_ptr cinfo, boolean need_full_buffer)
 {
   my_coef_ptr coef;
diff --git a/code/jpeg-6/jdcolor.c b/code/jpeg-6b/jdcolor.c
index b2bdf6e..6c04dfe 100644
--- a/code/jpeg-6/jdcolor.c
+++ b/code/jpeg-6b/jdcolor.c
@@ -1,7 +1,7 @@
 /*
  * jdcolor.c
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -66,7 +66,7 @@ typedef my_color_deconverter * my_cconvert_ptr;
  * Initialize tables for YCC->RGB colorspace conversion.
  */
 
-LOCAL void
+LOCAL(void)
 build_ycc_rgb_table (j_decompress_ptr cinfo)
 {
   my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
@@ -116,7 +116,7 @@ build_ycc_rgb_table (j_decompress_ptr cinfo)
  * offset required on that side.
  */
 
-METHODDEF void
+METHODDEF(void)
 ycc_rgb_convert (j_decompress_ptr cinfo,
 		 JSAMPIMAGE input_buf, JDIMENSION input_row,
 		 JSAMPARRAY output_buf, int num_rows)
@@ -165,7 +165,7 @@ ycc_rgb_convert (j_decompress_ptr cinfo,
  * converting from separate-planes to interleaved representation.
  */
 
-METHODDEF void
+METHODDEF(void)
 null_convert (j_decompress_ptr cinfo,
 	      JSAMPIMAGE input_buf, JDIMENSION input_row,
 	      JSAMPARRAY output_buf, int num_rows)
@@ -197,7 +197,7 @@ null_convert (j_decompress_ptr cinfo,
  * we just copy the Y (luminance) component and ignore chrominance.
  */
 
-METHODDEF void
+METHODDEF(void)
 grayscale_convert (j_decompress_ptr cinfo,
 		   JSAMPIMAGE input_buf, JDIMENSION input_row,
 		   JSAMPARRAY output_buf, int num_rows)
@@ -208,13 +208,40 @@ grayscale_convert (j_decompress_ptr cinfo,
 
 
 /*
+ * Convert grayscale to RGB: just duplicate the graylevel three times.
+ * This is provided to support applications that don't want to cope
+ * with grayscale as a separate case.
+ */
+
+METHODDEF(void)
+gray_rgb_convert (j_decompress_ptr cinfo,
+		  JSAMPIMAGE input_buf, JDIMENSION input_row,
+		  JSAMPARRAY output_buf, int num_rows)
+{
+  register JSAMPROW inptr, outptr;
+  register JDIMENSION col;
+  JDIMENSION num_cols = cinfo->output_width;
+
+  while (--num_rows >= 0) {
+    inptr = input_buf[0][input_row++];
+    outptr = *output_buf++;
+    for (col = 0; col < num_cols; col++) {
+      /* We can dispense with GETJSAMPLE() here */
+      outptr[RGB_RED] = outptr[RGB_GREEN] = outptr[RGB_BLUE] = inptr[col];
+      outptr += RGB_PIXELSIZE;
+    }
+  }
+}
+
+
+/*
  * Adobe-style YCCK->CMYK conversion.
  * We convert YCbCr to R=1-C, G=1-M, and B=1-Y using the same
  * conversion as above, while passing K (black) unchanged.
  * We assume build_ycc_rgb_table has been called.
  */
 
-METHODDEF void
+METHODDEF(void)
 ycck_cmyk_convert (j_decompress_ptr cinfo,
 		   JSAMPIMAGE input_buf, JDIMENSION input_row,
 		   JSAMPARRAY output_buf, int num_rows)
@@ -262,7 +289,7 @@ ycck_cmyk_convert (j_decompress_ptr cinfo,
  * Empty method for start_pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_dcolor (j_decompress_ptr cinfo)
 {
   /* no work needed */
@@ -273,7 +300,7 @@ start_pass_dcolor (j_decompress_ptr cinfo)
  * Module initialization routine for output colorspace conversion.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_color_deconverter (j_decompress_ptr cinfo)
 {
   my_cconvert_ptr cconvert;
@@ -333,6 +360,8 @@ jinit_color_deconverter (j_decompress_ptr cinfo)
     if (cinfo->jpeg_color_space == JCS_YCbCr) {
       cconvert->pub.color_convert = ycc_rgb_convert;
       build_ycc_rgb_table(cinfo);
+    } else if (cinfo->jpeg_color_space == JCS_GRAYSCALE) {
+      cconvert->pub.color_convert = gray_rgb_convert;
     } else if (cinfo->jpeg_color_space == JCS_RGB && RGB_PIXELSIZE == 3) {
       cconvert->pub.color_convert = null_convert;
     } else
diff --git a/code/jpeg-6/jdct.h b/code/jpeg-6b/jdct.h
index 3ce790b..04192a2 100644
--- a/code/jpeg-6/jdct.h
+++ b/code/jpeg-6b/jdct.h
@@ -1,7 +1,7 @@
 /*
  * jdct.h
  *
- * Copyright (C) 1994, Thomas G. Lane.
+ * Copyright (C) 1994-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -94,26 +94,26 @@ typedef FAST_FLOAT FLOAT_MULT_TYPE; /* preferred floating type */
 
 /* Extern declarations for the forward and inverse DCT routines. */
 
-EXTERN void jpeg_fdct_islow JPP((DCTELEM * data));
-EXTERN void jpeg_fdct_ifast JPP((DCTELEM * data));
-EXTERN void jpeg_fdct_float JPP((FAST_FLOAT * data));
+EXTERN(void) jpeg_fdct_islow JPP((DCTELEM * data));
+EXTERN(void) jpeg_fdct_ifast JPP((DCTELEM * data));
+EXTERN(void) jpeg_fdct_float JPP((FAST_FLOAT * data));
 
-EXTERN void jpeg_idct_islow
+EXTERN(void) jpeg_idct_islow
     JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
 	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
-EXTERN void jpeg_idct_ifast
+EXTERN(void) jpeg_idct_ifast
     JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
 	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
-EXTERN void jpeg_idct_float
+EXTERN(void) jpeg_idct_float
     JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
 	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
-EXTERN void jpeg_idct_4x4
+EXTERN(void) jpeg_idct_4x4
     JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
 	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
-EXTERN void jpeg_idct_2x2
+EXTERN(void) jpeg_idct_2x2
     JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
 	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
-EXTERN void jpeg_idct_1x1
+EXTERN(void) jpeg_idct_1x1
     JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
 	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
 
diff --git a/code/jpeg-6/jddctmgr.c b/code/jpeg-6b/jddctmgr.c
index 71215f1..bbf8d0e 100644
--- a/code/jpeg-6/jddctmgr.c
+++ b/code/jpeg-6b/jddctmgr.c
@@ -1,7 +1,7 @@
 /*
  * jddctmgr.c
  *
- * Copyright (C) 1994-1995, Thomas G. Lane.
+ * Copyright (C) 1994-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -85,7 +85,7 @@ typedef union {
  * a matching multiplier table.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass (j_decompress_ptr cinfo)
 {
   my_idct_ptr idct = (my_idct_ptr) cinfo->idct;
@@ -161,11 +161,11 @@ start_pass (j_decompress_ptr cinfo)
     case JDCT_ISLOW:
       {
 	/* For LL&M IDCT method, multipliers are equal to raw quantization
-	 * coefficients, but are stored in natural order as ints.
+	 * coefficients, but are stored as ints to ensure access efficiency.
 	 */
 	ISLOW_MULT_TYPE * ismtbl = (ISLOW_MULT_TYPE *) compptr->dct_table;
 	for (i = 0; i < DCTSIZE2; i++) {
-	  ismtbl[i] = (ISLOW_MULT_TYPE) qtbl->quantval[jpeg_zigzag_order[i]];
+	  ismtbl[i] = (ISLOW_MULT_TYPE) qtbl->quantval[i];
 	}
       }
       break;
@@ -178,7 +178,7 @@ start_pass (j_decompress_ptr cinfo)
 	 *   scalefactor[0] = 1
 	 *   scalefactor[k] = cos(k*PI/16) * sqrt(2)    for k=1..7
 	 * For integer operation, the multiplier table is to be scaled by
-	 * IFAST_SCALE_BITS.  The multipliers are stored in natural order.
+	 * IFAST_SCALE_BITS.
 	 */
 	IFAST_MULT_TYPE * ifmtbl = (IFAST_MULT_TYPE *) compptr->dct_table;
 #define CONST_BITS 14
@@ -197,7 +197,7 @@ start_pass (j_decompress_ptr cinfo)
 
 	for (i = 0; i < DCTSIZE2; i++) {
 	  ifmtbl[i] = (IFAST_MULT_TYPE)
-	    DESCALE(MULTIPLY16V16((INT32) qtbl->quantval[jpeg_zigzag_order[i]],
+	    DESCALE(MULTIPLY16V16((INT32) qtbl->quantval[i],
 				  (INT32) aanscales[i]),
 		    CONST_BITS-IFAST_SCALE_BITS);
 	}
@@ -211,7 +211,6 @@ start_pass (j_decompress_ptr cinfo)
 	 * coefficients scaled by scalefactor[row]*scalefactor[col], where
 	 *   scalefactor[0] = 1
 	 *   scalefactor[k] = cos(k*PI/16) * sqrt(2)    for k=1..7
-	 * The multipliers are stored in natural order.
 	 */
 	FLOAT_MULT_TYPE * fmtbl = (FLOAT_MULT_TYPE *) compptr->dct_table;
 	int row, col;
@@ -224,7 +223,7 @@ start_pass (j_decompress_ptr cinfo)
 	for (row = 0; row < DCTSIZE; row++) {
 	  for (col = 0; col < DCTSIZE; col++) {
 	    fmtbl[i] = (FLOAT_MULT_TYPE)
-	      ((double) qtbl->quantval[jpeg_zigzag_order[i]] *
+	      ((double) qtbl->quantval[i] *
 	       aanscalefactor[row] * aanscalefactor[col]);
 	    i++;
 	  }
@@ -244,7 +243,7 @@ start_pass (j_decompress_ptr cinfo)
  * Initialize IDCT manager.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_inverse_dct (j_decompress_ptr cinfo)
 {
   my_idct_ptr idct;
diff --git a/code/jpeg-6/jdhuff.c b/code/jpeg-6b/jdhuff.c
index 95174b1..b5ba39f 100644
--- a/code/jpeg-6/jdhuff.c
+++ b/code/jpeg-6b/jdhuff.c
@@ -1,7 +1,7 @@
 /*
  * jdhuff.c
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -64,6 +64,15 @@ typedef struct {
   /* Pointers to derived tables (these workspaces have image lifespan) */
   d_derived_tbl * dc_derived_tbls[NUM_HUFF_TBLS];
   d_derived_tbl * ac_derived_tbls[NUM_HUFF_TBLS];
+
+  /* Precalculated info set up by start_pass for use in decode_mcu: */
+
+  /* Pointers to derived tables to be used for each block within an MCU */
+  d_derived_tbl * dc_cur_tbls[D_MAX_BLOCKS_IN_MCU];
+  d_derived_tbl * ac_cur_tbls[D_MAX_BLOCKS_IN_MCU];
+  /* Whether we care about the DC and AC coefficient values for each block */
+  boolean dc_needed[D_MAX_BLOCKS_IN_MCU];
+  boolean ac_needed[D_MAX_BLOCKS_IN_MCU];
 } huff_entropy_decoder;
 
 typedef huff_entropy_decoder * huff_entropy_ptr;
@@ -73,11 +82,11 @@ typedef huff_entropy_decoder * huff_entropy_ptr;
  * Initialize for a Huffman-compressed scan.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_huff_decoder (j_decompress_ptr cinfo)
 {
   huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
-  int ci, dctbl, actbl;
+  int ci, blkn, dctbl, actbl;
   jpeg_component_info * compptr;
 
   /* Check that the scan parameters Ss, Se, Ah/Al are OK for sequential JPEG.
@@ -92,27 +101,37 @@ start_pass_huff_decoder (j_decompress_ptr cinfo)
     compptr = cinfo->cur_comp_info[ci];
     dctbl = compptr->dc_tbl_no;
     actbl = compptr->ac_tbl_no;
-    /* Make sure requested tables are present */
-    if (dctbl < 0 || dctbl >= NUM_HUFF_TBLS ||
-	cinfo->dc_huff_tbl_ptrs[dctbl] == NULL)
-      ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, dctbl);
-    if (actbl < 0 || actbl >= NUM_HUFF_TBLS ||
-	cinfo->ac_huff_tbl_ptrs[actbl] == NULL)
-      ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, actbl);
     /* Compute derived values for Huffman tables */
     /* We may do this more than once for a table, but it's not expensive */
-    jpeg_make_d_derived_tbl(cinfo, cinfo->dc_huff_tbl_ptrs[dctbl],
+    jpeg_make_d_derived_tbl(cinfo, TRUE, dctbl,
 			    & entropy->dc_derived_tbls[dctbl]);
-    jpeg_make_d_derived_tbl(cinfo, cinfo->ac_huff_tbl_ptrs[actbl],
+    jpeg_make_d_derived_tbl(cinfo, FALSE, actbl,
 			    & entropy->ac_derived_tbls[actbl]);
     /* Initialize DC predictions to 0 */
     entropy->saved.last_dc_val[ci] = 0;
   }
 
+  /* Precalculate decoding info for each block in an MCU of this scan */
+  for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
+    ci = cinfo->MCU_membership[blkn];
+    compptr = cinfo->cur_comp_info[ci];
+    /* Precalculate which table to use for each block */
+    entropy->dc_cur_tbls[blkn] = entropy->dc_derived_tbls[compptr->dc_tbl_no];
+    entropy->ac_cur_tbls[blkn] = entropy->ac_derived_tbls[compptr->ac_tbl_no];
+    /* Decide whether we really care about the coefficient values */
+    if (compptr->component_needed) {
+      entropy->dc_needed[blkn] = TRUE;
+      /* we don't need the ACs if producing a 1/8th-size image */
+      entropy->ac_needed[blkn] = (compptr->DCT_scaled_size > 1);
+    } else {
+      entropy->dc_needed[blkn] = entropy->ac_needed[blkn] = FALSE;
+    }
+  }
+
   /* Initialize bitread state variables */
   entropy->bitstate.bits_left = 0;
   entropy->bitstate.get_buffer = 0; /* unnecessary, but keeps Purify quiet */
-  entropy->bitstate.printed_eod = FALSE;
+  entropy->pub.insufficient_data = FALSE;
 
   /* Initialize restart counter */
   entropy->restarts_to_go = cinfo->restart_interval;
@@ -121,20 +140,35 @@ start_pass_huff_decoder (j_decompress_ptr cinfo)
 
 /*
  * Compute the derived values for a Huffman table.
+ * This routine also performs some validation checks on the table.
+ *
  * Note this is also used by jdphuff.c.
  */
 
-GLOBAL void
-jpeg_make_d_derived_tbl (j_decompress_ptr cinfo, JHUFF_TBL * htbl,
+GLOBAL(void)
+jpeg_make_d_derived_tbl (j_decompress_ptr cinfo, boolean isDC, int tblno,
 			 d_derived_tbl ** pdtbl)
 {
+  JHUFF_TBL *htbl;
   d_derived_tbl *dtbl;
-  int p, i, l, si;
+  int p, i, l, si, numsymbols;
   int lookbits, ctr;
   char huffsize[257];
   unsigned int huffcode[257];
   unsigned int code;
 
+  /* Note that huffsize[] and huffcode[] are filled in code-length order,
+   * paralleling the order of the symbols themselves in htbl->huffval[].
+   */
+
+  /* Find the input Huffman table */
+  if (tblno < 0 || tblno >= NUM_HUFF_TBLS)
+    ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tblno);
+  htbl =
+    isDC ? cinfo->dc_huff_tbl_ptrs[tblno] : cinfo->ac_huff_tbl_ptrs[tblno];
+  if (htbl == NULL)
+    ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tblno);
+
   /* Allocate a workspace if we haven't already done so. */
   if (*pdtbl == NULL)
     *pdtbl = (d_derived_tbl *)
@@ -144,17 +178,20 @@ jpeg_make_d_derived_tbl (j_decompress_ptr cinfo, JHUFF_TBL * htbl,
   dtbl->pub = htbl;		/* fill in back link */
   
   /* Figure C.1: make table of Huffman code length for each symbol */
-  /* Note that this is in code-length order. */
 
   p = 0;
   for (l = 1; l <= 16; l++) {
-    for (i = 1; i <= (int) htbl->bits[l]; i++)
+    i = (int) htbl->bits[l];
+    if (i < 0 || p + i > 256)	/* protect against table overrun */
+      ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
+    while (i--)
       huffsize[p++] = (char) l;
   }
   huffsize[p] = 0;
+  numsymbols = p;
   
   /* Figure C.2: generate the codes themselves */
-  /* Note that this is in code-length order. */
+  /* We also validate that the counts represent a legal Huffman code tree. */
   
   code = 0;
   si = huffsize[0];
@@ -164,6 +201,11 @@ jpeg_make_d_derived_tbl (j_decompress_ptr cinfo, JHUFF_TBL * htbl,
       huffcode[p++] = code;
       code++;
     }
+    /* code is now 1 more than the last code used for codelength si; but
+     * it must still fit in si bits, since no code is allowed to be all ones.
+     */
+    if (((INT32) code) >= (((INT32) 1) << si))
+      ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
     code <<= 1;
     si++;
   }
@@ -173,8 +215,10 @@ jpeg_make_d_derived_tbl (j_decompress_ptr cinfo, JHUFF_TBL * htbl,
   p = 0;
   for (l = 1; l <= 16; l++) {
     if (htbl->bits[l]) {
-      dtbl->valptr[l] = p; /* huffval[] index of 1st symbol of code length l */
-      dtbl->mincode[l] = huffcode[p]; /* minimum code of length l */
+      /* valoffset[l] = huffval[] index of 1st symbol of code length l,
+       * minus the minimum code of length l
+       */
+      dtbl->valoffset[l] = (INT32) p - (INT32) huffcode[p];
       p += htbl->bits[l];
       dtbl->maxcode[l] = huffcode[p-1]; /* maximum code of length l */
     } else {
@@ -205,6 +249,20 @@ jpeg_make_d_derived_tbl (j_decompress_ptr cinfo, JHUFF_TBL * htbl,
       }
     }
   }
+
+  /* Validate symbols as being reasonable.
+   * For AC tables, we make no check, but accept all byte values 0..255.
+   * For DC tables, we require the symbols to be in range 0..15.
+   * (Tighter bounds could be applied depending on the data depth and mode,
+   * but this is sufficient to ensure safe decoding.)
+   */
+  if (isDC) {
+    for (i = 0; i < numsymbols; i++) {
+      int sym = htbl->huffval[i];
+      if (sym < 0 || sym > 15)
+	ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
+    }
+  }
 }
 
 
@@ -230,7 +288,7 @@ jpeg_make_d_derived_tbl (j_decompress_ptr cinfo, JHUFF_TBL * htbl,
 #endif
 
 
-GLOBAL boolean
+GLOBAL(boolean)
 jpeg_fill_bit_buffer (bitread_working_state * state,
 		      register bit_buf_type get_buffer, register int bits_left,
 		      int nbits)
@@ -239,68 +297,86 @@ jpeg_fill_bit_buffer (bitread_working_state * state,
   /* Copy heavily used state fields into locals (hopefully registers) */
   register const JOCTET * next_input_byte = state->next_input_byte;
   register size_t bytes_in_buffer = state->bytes_in_buffer;
-  register int c;
+  j_decompress_ptr cinfo = state->cinfo;
 
   /* Attempt to load at least MIN_GET_BITS bits into get_buffer. */
   /* (It is assumed that no request will be for more than that many bits.) */
-
-  while (bits_left < MIN_GET_BITS) {
-    /* Attempt to read a byte */
-    if (state->unread_marker != 0)
-      goto no_more_data;	/* can't advance past a marker */
-
-    if (bytes_in_buffer == 0) {
-      if (! (*state->cinfo->src->fill_input_buffer) (state->cinfo))
-	return FALSE;
-      next_input_byte = state->cinfo->src->next_input_byte;
-      bytes_in_buffer = state->cinfo->src->bytes_in_buffer;
-    }
-    bytes_in_buffer--;
-    c = GETJOCTET(*next_input_byte++);
-
-    /* If it's 0xFF, check and discard stuffed zero byte */
-    if (c == 0xFF) {
-      do {
-	if (bytes_in_buffer == 0) {
-	  if (! (*state->cinfo->src->fill_input_buffer) (state->cinfo))
-	    return FALSE;
-	  next_input_byte = state->cinfo->src->next_input_byte;
-	  bytes_in_buffer = state->cinfo->src->bytes_in_buffer;
-	}
-	bytes_in_buffer--;
-	c = GETJOCTET(*next_input_byte++);
-      } while (c == 0xFF);
-
-      if (c == 0) {
-	/* Found FF/00, which represents an FF data byte */
-	c = 0xFF;
-      } else {
-	/* Oops, it's actually a marker indicating end of compressed data. */
-	/* Better put it back for use later */
-	state->unread_marker = c;
-
-      no_more_data:
-	/* There should be enough bits still left in the data segment; */
-	/* if so, just break out of the outer while loop. */
-	if (bits_left >= nbits)
-	  break;
-	/* Uh-oh.  Report corrupted data to user and stuff zeroes into
-	 * the data stream, so that we can produce some kind of image.
-	 * Note that this code will be repeated for each byte demanded
-	 * for the rest of the segment.  We use a nonvolatile flag to ensure
-	 * that only one warning message appears.
+  /* We fail to do so only if we hit a marker or are forced to suspend. */
+
+  if (cinfo->unread_marker == 0) {	/* cannot advance past a marker */
+    while (bits_left < MIN_GET_BITS) {
+      register int c;
+
+      /* Attempt to read a byte */
+      if (bytes_in_buffer == 0) {
+	if (! (*cinfo->src->fill_input_buffer) (cinfo))
+	  return FALSE;
+	next_input_byte = cinfo->src->next_input_byte;
+	bytes_in_buffer = cinfo->src->bytes_in_buffer;
+      }
+      bytes_in_buffer--;
+      c = GETJOCTET(*next_input_byte++);
+
+      /* If it's 0xFF, check and discard stuffed zero byte */
+      if (c == 0xFF) {
+	/* Loop here to discard any padding FF's on terminating marker,
+	 * so that we can save a valid unread_marker value.  NOTE: we will
+	 * accept multiple FF's followed by a 0 as meaning a single FF data
+	 * byte.  This data pattern is not valid according to the standard.
 	 */
-	if (! *(state->printed_eod_ptr)) {
-	  WARNMS(state->cinfo, JWRN_HIT_MARKER);
-	  *(state->printed_eod_ptr) = TRUE;
+	do {
+	  if (bytes_in_buffer == 0) {
+	    if (! (*cinfo->src->fill_input_buffer) (cinfo))
+	      return FALSE;
+	    next_input_byte = cinfo->src->next_input_byte;
+	    bytes_in_buffer = cinfo->src->bytes_in_buffer;
+	  }
+	  bytes_in_buffer--;
+	  c = GETJOCTET(*next_input_byte++);
+	} while (c == 0xFF);
+
+	if (c == 0) {
+	  /* Found FF/00, which represents an FF data byte */
+	  c = 0xFF;
+	} else {
+	  /* Oops, it's actually a marker indicating end of compressed data.
+	   * Save the marker code for later use.
+	   * Fine point: it might appear that we should save the marker into
+	   * bitread working state, not straight into permanent state.  But
+	   * once we have hit a marker, we cannot need to suspend within the
+	   * current MCU, because we will read no more bytes from the data
+	   * source.  So it is OK to update permanent state right away.
+	   */
+	  cinfo->unread_marker = c;
+	  /* See if we need to insert some fake zero bits. */
+	  goto no_more_bytes;
 	}
-	c = 0;			/* insert a zero byte into bit buffer */
       }
-    }
 
-    /* OK, load c into get_buffer */
-    get_buffer = (get_buffer << 8) | c;
-    bits_left += 8;
+      /* OK, load c into get_buffer */
+      get_buffer = (get_buffer << 8) | c;
+      bits_left += 8;
+    } /* end while */
+  } else {
+  no_more_bytes:
+    /* We get here if we've read the marker that terminates the compressed
+     * data segment.  There should be enough bits in the buffer register
+     * to satisfy the request; if so, no problem.
+     */
+    if (nbits > bits_left) {
+      /* Uh-oh.  Report corrupted data to user and stuff zeroes into
+       * the data stream, so that we can produce some kind of image.
+       * We use a nonvolatile flag to ensure that only one warning message
+       * appears per data segment.
+       */
+      if (! cinfo->entropy->insufficient_data) {
+	WARNMS(cinfo, JWRN_HIT_MARKER);
+	cinfo->entropy->insufficient_data = TRUE;
+      }
+      /* Fill the buffer with zero bits */
+      get_buffer <<= MIN_GET_BITS - bits_left;
+      bits_left = MIN_GET_BITS;
+    }
   }
 
   /* Unload the local registers */
@@ -318,7 +394,7 @@ jpeg_fill_bit_buffer (bitread_working_state * state,
  * See jdhuff.h for info about usage.
  */
 
-GLOBAL int
+GLOBAL(int)
 jpeg_huff_decode (bitread_working_state * state,
 		  register bit_buf_type get_buffer, register int bits_left,
 		  d_derived_tbl * htbl, int min_bits)
@@ -353,8 +429,7 @@ jpeg_huff_decode (bitread_working_state * state,
     return 0;			/* fake a zero as the safest result */
   }
 
-  return htbl->pub->huffval[ htbl->valptr[l] +
-			    ((int) (code - htbl->mincode[l])) ];
+  return htbl->pub->huffval[ (int) (code + htbl->valoffset[l]) ];
 }
 
 
@@ -389,7 +464,7 @@ static const int extend_offset[16] = /* entry n is (-1 << n) + 1 */
  * Returns FALSE if must suspend.
  */
 
-LOCAL boolean
+LOCAL(boolean)
 process_restart (j_decompress_ptr cinfo)
 {
   huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
@@ -411,8 +486,13 @@ process_restart (j_decompress_ptr cinfo)
   /* Reset restart counter */
   entropy->restarts_to_go = cinfo->restart_interval;
 
-  /* Next segment can get another out-of-data warning */
-  entropy->bitstate.printed_eod = FALSE;
+  /* Reset out-of-data flag, unless read_restart_marker left us smack up
+   * against a marker.  In that case we will end up treating the next data
+   * segment as empty, and we can avoid producing bogus output pixels by
+   * leaving the flag set.
+   */
+  if (cinfo->unread_marker == 0)
+    entropy->pub.insufficient_data = FALSE;
 
   return TRUE;
 }
@@ -433,18 +513,13 @@ process_restart (j_decompress_ptr cinfo)
  * this module, since we'll just re-assign them on the next call.)
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
 {
   huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
-  register int s, k, r;
-  int blkn, ci;
-  JBLOCKROW block;
+  int blkn;
   BITREAD_STATE_VARS;
   savable_state state;
-  d_derived_tbl * dctbl;
-  d_derived_tbl * actbl;
-  jpeg_component_info * compptr;
 
   /* Process restart marker if needed; may have to suspend */
   if (cinfo->restart_interval) {
@@ -453,95 +528,97 @@ decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
 	return FALSE;
   }
 
-  /* Load up working state */
-  BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
-  ASSIGN_STATE(state, entropy->saved);
+  /* If we've run out of data, just leave the MCU set to zeroes.
+   * This way, we return uniform gray for the remainder of the segment.
+   */
+  if (! entropy->pub.insufficient_data) {
 
-  /* Outer loop handles each block in the MCU */
+    /* Load up working state */
+    BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
+    ASSIGN_STATE(state, entropy->saved);
 
-  for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
-    block = MCU_data[blkn];
-    ci = cinfo->MCU_membership[blkn];
-    compptr = cinfo->cur_comp_info[ci];
-    dctbl = entropy->dc_derived_tbls[compptr->dc_tbl_no];
-    actbl = entropy->ac_derived_tbls[compptr->ac_tbl_no];
+    /* Outer loop handles each block in the MCU */
 
-    /* Decode a single block's worth of coefficients */
+    for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
+      JBLOCKROW block = MCU_data[blkn];
+      d_derived_tbl * dctbl = entropy->dc_cur_tbls[blkn];
+      d_derived_tbl * actbl = entropy->ac_cur_tbls[blkn];
+      register int s, k, r;
 
-    /* Section F.2.2.1: decode the DC coefficient difference */
-    HUFF_DECODE(s, br_state, dctbl, return FALSE, label1);
-    if (s) {
-      CHECK_BIT_BUFFER(br_state, s, return FALSE);
-      r = GET_BITS(s);
-      s = HUFF_EXTEND(r, s);
-    }
+      /* Decode a single block's worth of coefficients */
 
-    /* Shortcut if component's values are not interesting */
-    if (! compptr->component_needed)
-      goto skip_ACs;
+      /* Section F.2.2.1: decode the DC coefficient difference */
+      HUFF_DECODE(s, br_state, dctbl, return FALSE, label1);
+      if (s) {
+	CHECK_BIT_BUFFER(br_state, s, return FALSE);
+	r = GET_BITS(s);
+	s = HUFF_EXTEND(r, s);
+      }
 
-    /* Convert DC difference to actual value, update last_dc_val */
-    s += state.last_dc_val[ci];
-    state.last_dc_val[ci] = s;
-    /* Output the DC coefficient (assumes jpeg_natural_order[0] = 0) */
-    (*block)[0] = (JCOEF) s;
+      if (entropy->dc_needed[blkn]) {
+	/* Convert DC difference to actual value, update last_dc_val */
+	int ci = cinfo->MCU_membership[blkn];
+	s += state.last_dc_val[ci];
+	state.last_dc_val[ci] = s;
+	/* Output the DC coefficient (assumes jpeg_natural_order[0] = 0) */
+	(*block)[0] = (JCOEF) s;
+      }
 
-    /* Do we need to decode the AC coefficients for this component? */
-    if (compptr->DCT_scaled_size > 1) {
+      if (entropy->ac_needed[blkn]) {
 
-      /* Section F.2.2.2: decode the AC coefficients */
-      /* Since zeroes are skipped, output area must be cleared beforehand */
-      for (k = 1; k < DCTSIZE2; k++) {
-	HUFF_DECODE(s, br_state, actbl, return FALSE, label2);
+	/* Section F.2.2.2: decode the AC coefficients */
+	/* Since zeroes are skipped, output area must be cleared beforehand */
+	for (k = 1; k < DCTSIZE2; k++) {
+	  HUFF_DECODE(s, br_state, actbl, return FALSE, label2);
       
-	r = s >> 4;
-	s &= 15;
+	  r = s >> 4;
+	  s &= 15;
       
-	if (s) {
-	  k += r;
-	  CHECK_BIT_BUFFER(br_state, s, return FALSE);
-	  r = GET_BITS(s);
-	  s = HUFF_EXTEND(r, s);
-	  /* Output coefficient in natural (dezigzagged) order.
-	   * Note: the extra entries in jpeg_natural_order[] will save us
-	   * if k >= DCTSIZE2, which could happen if the data is corrupted.
-	   */
-	  (*block)[jpeg_natural_order[k]] = (JCOEF) s;
-	} else {
-	  if (r != 15)
-	    break;
-	  k += 15;
+	  if (s) {
+	    k += r;
+	    CHECK_BIT_BUFFER(br_state, s, return FALSE);
+	    r = GET_BITS(s);
+	    s = HUFF_EXTEND(r, s);
+	    /* Output coefficient in natural (dezigzagged) order.
+	     * Note: the extra entries in jpeg_natural_order[] will save us
+	     * if k >= DCTSIZE2, which could happen if the data is corrupted.
+	     */
+	    (*block)[jpeg_natural_order[k]] = (JCOEF) s;
+	  } else {
+	    if (r != 15)
+	      break;
+	    k += 15;
+	  }
 	}
-      }
 
-    } else {
-skip_ACs:
+      } else {
 
-      /* Section F.2.2.2: decode the AC coefficients */
-      /* In this path we just discard the values */
-      for (k = 1; k < DCTSIZE2; k++) {
-	HUFF_DECODE(s, br_state, actbl, return FALSE, label3);
+	/* Section F.2.2.2: decode the AC coefficients */
+	/* In this path we just discard the values */
+	for (k = 1; k < DCTSIZE2; k++) {
+	  HUFF_DECODE(s, br_state, actbl, return FALSE, label3);
       
-	r = s >> 4;
-	s &= 15;
+	  r = s >> 4;
+	  s &= 15;
       
-	if (s) {
-	  k += r;
-	  CHECK_BIT_BUFFER(br_state, s, return FALSE);
-	  DROP_BITS(s);
-	} else {
-	  if (r != 15)
-	    break;
-	  k += 15;
+	  if (s) {
+	    k += r;
+	    CHECK_BIT_BUFFER(br_state, s, return FALSE);
+	    DROP_BITS(s);
+	  } else {
+	    if (r != 15)
+	      break;
+	    k += 15;
+	  }
 	}
-      }
 
+      }
     }
-  }
 
-  /* Completed MCU, so update state */
-  BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
-  ASSIGN_STATE(entropy->saved, state);
+    /* Completed MCU, so update state */
+    BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
+    ASSIGN_STATE(entropy->saved, state);
+  }
 
   /* Account for restart interval (no-op if not using restarts) */
   entropy->restarts_to_go--;
@@ -554,7 +631,7 @@ skip_ACs:
  * Module initialization routine for Huffman entropy decoding.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_huff_decoder (j_decompress_ptr cinfo)
 {
   huff_entropy_ptr entropy;
diff --git a/code/jpeg-6/jdhuff.h b/code/jpeg-6b/jdhuff.h
index d67fc3b..ae19b6c 100644
--- a/code/jpeg-6/jdhuff.h
+++ b/code/jpeg-6b/jdhuff.h
@@ -1,7 +1,7 @@
 /*
  * jdhuff.h
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -25,10 +25,13 @@
 
 typedef struct {
   /* Basic tables: (element [0] of each array is unused) */
-  INT32 mincode[17];		/* smallest code of length k */
   INT32 maxcode[18];		/* largest code of length k (-1 if none) */
   /* (maxcode[17] is a sentinel to ensure jpeg_huff_decode terminates) */
-  int valptr[17];		/* huffval[] index of 1st symbol of length k */
+  INT32 valoffset[17];		/* huffval[] offset for codes of length k */
+  /* valoffset[k] = huffval[] index of 1st symbol of code length k, less
+   * the smallest code of length k; so given a code of length k, the
+   * corresponding symbol is huffval[code + valoffset[k]]
+   */
 
   /* Link to public Huffman table (needed only in jpeg_huff_decode) */
   JHUFF_TBL *pub;
@@ -43,8 +46,9 @@ typedef struct {
 } d_derived_tbl;
 
 /* Expand a Huffman table definition into the derived format */
-EXTERN void jpeg_make_d_derived_tbl JPP((j_decompress_ptr cinfo,
-				JHUFF_TBL * htbl, d_derived_tbl ** pdtbl));
+EXTERN(void) jpeg_make_d_derived_tbl
+	JPP((j_decompress_ptr cinfo, boolean isDC, int tblno,
+	     d_derived_tbl ** pdtbl));
 
 
 /*
@@ -70,51 +74,46 @@ typedef INT32 bit_buf_type;	/* type of bit-extraction buffer */
 
 /* If long is > 32 bits on your machine, and shifting/masking longs is
  * reasonably fast, making bit_buf_type be long and setting BIT_BUF_SIZE
- * appropriately should be a win.  Unfortunately we can't do this with
- * something like  #define BIT_BUF_SIZE (sizeof(bit_buf_type)*8)
+ * appropriately should be a win.  Unfortunately we can't define the size
+ * with something like  #define BIT_BUF_SIZE (sizeof(bit_buf_type)*8)
  * because not all machines measure sizeof in 8-bit bytes.
  */
 
 typedef struct {		/* Bitreading state saved across MCUs */
   bit_buf_type get_buffer;	/* current bit-extraction buffer */
   int bits_left;		/* # of unused bits in it */
-  boolean printed_eod;		/* flag to suppress multiple warning msgs */
 } bitread_perm_state;
 
 typedef struct {		/* Bitreading working state within an MCU */
-  /* current data source state */
+  /* Current data source location */
+  /* We need a copy, rather than munging the original, in case of suspension */
   const JOCTET * next_input_byte; /* => next byte to read from source */
   size_t bytes_in_buffer;	/* # of bytes remaining in source buffer */
-  int unread_marker;		/* nonzero if we have hit a marker */
-  /* bit input buffer --- note these values are kept in register variables,
+  /* Bit input buffer --- note these values are kept in register variables,
    * not in this struct, inside the inner loops.
    */
   bit_buf_type get_buffer;	/* current bit-extraction buffer */
   int bits_left;		/* # of unused bits in it */
-  /* pointers needed by jpeg_fill_bit_buffer */
+  /* Pointer needed by jpeg_fill_bit_buffer. */
   j_decompress_ptr cinfo;	/* back link to decompress master record */
-  boolean * printed_eod_ptr;	/* => flag in permanent state */
 } bitread_working_state;
 
 /* Macros to declare and load/save bitread local variables. */
 #define BITREAD_STATE_VARS  \
 	register bit_buf_type get_buffer;  \
 	register int bits_left;  \
-	bitread_working_state br_state = {0}
+	bitread_working_state br_state
 
 #define BITREAD_LOAD_STATE(cinfop,permstate)  \
 	br_state.cinfo = cinfop; \
 	br_state.next_input_byte = cinfop->src->next_input_byte; \
 	br_state.bytes_in_buffer = cinfop->src->bytes_in_buffer; \
-	br_state.unread_marker = cinfop->unread_marker; \
 	get_buffer = permstate.get_buffer; \
-	bits_left = permstate.bits_left; \
-	br_state.printed_eod_ptr = & permstate.printed_eod
+	bits_left = permstate.bits_left;
 
 #define BITREAD_SAVE_STATE(cinfop,permstate)  \
 	cinfop->src->next_input_byte = br_state.next_input_byte; \
 	cinfop->src->bytes_in_buffer = br_state.bytes_in_buffer; \
-	cinfop->unread_marker = br_state.unread_marker; \
 	permstate.get_buffer = get_buffer; \
 	permstate.bits_left = bits_left
 
@@ -152,9 +151,9 @@ typedef struct {		/* Bitreading working state within an MCU */
 	(bits_left -= (nbits))
 
 /* Load up the bit buffer to a depth of at least nbits */
-EXTERN boolean jpeg_fill_bit_buffer JPP((bitread_working_state * state,
-		register bit_buf_type get_buffer, register int bits_left,
-		int nbits));
+EXTERN(boolean) jpeg_fill_bit_buffer
+	JPP((bitread_working_state * state, register bit_buf_type get_buffer,
+	     register int bits_left, int nbits));
 
 
 /*
@@ -197,6 +196,6 @@ slowlabel: \
 }
 
 /* Out-of-line case for Huffman code fetching */
-EXTERN int jpeg_huff_decode JPP((bitread_working_state * state,
-		register bit_buf_type get_buffer, register int bits_left,
-		d_derived_tbl * htbl, int min_bits));
+EXTERN(int) jpeg_huff_decode
+	JPP((bitread_working_state * state, register bit_buf_type get_buffer,
+	     register int bits_left, d_derived_tbl * htbl, int min_bits));
diff --git a/code/jpeg-6/jdinput.c b/code/jpeg-6b/jdinput.c
index 3061a17..0c2ac8f 100644
--- a/code/jpeg-6/jdinput.c
+++ b/code/jpeg-6b/jdinput.c
@@ -1,7 +1,7 @@
 /*
  * jdinput.c
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -28,14 +28,14 @@ typedef my_input_controller * my_inputctl_ptr;
 
 
 /* Forward declarations */
-METHODDEF int consume_markers JPP((j_decompress_ptr cinfo));
+METHODDEF(int) consume_markers JPP((j_decompress_ptr cinfo));
 
 
 /*
  * Routines to calculate various quantities related to the size of the image.
  */
 
-LOCAL void
+LOCAL(void)
 initial_setup (j_decompress_ptr cinfo)
 /* Called once, when first SOS marker is reached */
 {
@@ -117,7 +117,7 @@ initial_setup (j_decompress_ptr cinfo)
 }
 
 
-LOCAL void
+LOCAL(void)
 per_scan_setup (j_decompress_ptr cinfo)
 /* Do computations that are needed before processing a JPEG scan */
 /* cinfo->comps_in_scan and cinfo->cur_comp_info[] were set from SOS marker */
@@ -216,7 +216,7 @@ per_scan_setup (j_decompress_ptr cinfo)
  * not at the current Q-table slots.
  */
 
-LOCAL void
+LOCAL(void)
 latch_quant_tables (j_decompress_ptr cinfo)
 {
   int ci, qtblno;
@@ -250,7 +250,7 @@ latch_quant_tables (j_decompress_ptr cinfo)
  * Subsequent calls come from consume_markers, below.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_input_pass (j_decompress_ptr cinfo)
 {
   per_scan_setup(cinfo);
@@ -267,7 +267,7 @@ start_input_pass (j_decompress_ptr cinfo)
  * the expected data of the scan.
  */
 
-METHODDEF void
+METHODDEF(void)
 finish_input_pass (j_decompress_ptr cinfo)
 {
   cinfo->inputctl->consume_input = consume_markers;
@@ -284,7 +284,7 @@ finish_input_pass (j_decompress_ptr cinfo)
  * we are reading a compressed data segment or inter-segment markers.
  */
 
-METHODDEF int
+METHODDEF(int)
 consume_markers (j_decompress_ptr cinfo)
 {
   my_inputctl_ptr inputctl = (my_inputctl_ptr) cinfo->inputctl;
@@ -301,7 +301,7 @@ consume_markers (j_decompress_ptr cinfo)
       initial_setup(cinfo);
       inputctl->inheaders = FALSE;
       /* Note: start_input_pass must be called by jdmaster.c
-       * before any more input can be consumed.  jdapi.c is
+       * before any more input can be consumed.  jdapimin.c is
        * responsible for enforcing this sequencing.
        */
     } else {			/* 2nd or later SOS marker */
@@ -335,7 +335,7 @@ consume_markers (j_decompress_ptr cinfo)
  * Reset state to begin a fresh datastream.
  */
 
-METHODDEF void
+METHODDEF(void)
 reset_input_controller (j_decompress_ptr cinfo)
 {
   my_inputctl_ptr inputctl = (my_inputctl_ptr) cinfo->inputctl;
@@ -357,7 +357,7 @@ reset_input_controller (j_decompress_ptr cinfo)
  * This is called only once, when the decompression object is created.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_input_controller (j_decompress_ptr cinfo)
 {
   my_inputctl_ptr inputctl;
diff --git a/code/jpeg-6/jdmainct.c b/code/jpeg-6b/jdmainct.c
index e50a471..2f26533 100644
--- a/code/jpeg-6/jdmainct.c
+++ b/code/jpeg-6b/jdmainct.c
@@ -1,7 +1,7 @@
 /*
  * jdmainct.c
  *
- * Copyright (C) 1994-1995, Thomas G. Lane.
+ * Copyright (C) 1994-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -140,20 +140,20 @@ typedef my_main_controller * my_main_ptr;
 
 
 /* Forward declarations */
-METHODDEF void process_data_simple_main
+METHODDEF(void) process_data_simple_main
 	JPP((j_decompress_ptr cinfo, JSAMPARRAY output_buf,
 	     JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail));
-METHODDEF void process_data_context_main
+METHODDEF(void) process_data_context_main
 	JPP((j_decompress_ptr cinfo, JSAMPARRAY output_buf,
 	     JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail));
 #ifdef QUANT_2PASS_SUPPORTED
-METHODDEF void process_data_crank_post
+METHODDEF(void) process_data_crank_post
 	JPP((j_decompress_ptr cinfo, JSAMPARRAY output_buf,
 	     JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail));
 #endif
 
 
-LOCAL void
+LOCAL(void)
 alloc_funny_pointers (j_decompress_ptr cinfo)
 /* Allocate space for the funny pointer lists.
  * This is done only once, not once per pass.
@@ -191,10 +191,10 @@ alloc_funny_pointers (j_decompress_ptr cinfo)
 }
 
 
-LOCAL void
+LOCAL(void)
 make_funny_pointers (j_decompress_ptr cinfo)
 /* Create the funny pointer lists discussed in the comments above.
- * The actual workspace is already allocated (in main->buffer),
+ * The actual workspace is already allocated (in jmain->buffer),
  * and the space for the pointer lists is allocated too.
  * This routine just fills in the curiously ordered lists.
  * This will be repeated at the beginning of each pass.
@@ -234,7 +234,7 @@ make_funny_pointers (j_decompress_ptr cinfo)
 }
 
 
-LOCAL void
+LOCAL(void)
 set_wraparound_pointers (j_decompress_ptr cinfo)
 /* Set up the "wraparound" pointers at top and bottom of the pointer lists.
  * This changes the pointer list state from top-of-image to the normal state.
@@ -262,7 +262,7 @@ set_wraparound_pointers (j_decompress_ptr cinfo)
 }
 
 
-LOCAL void
+LOCAL(void)
 set_bottom_pointers (j_decompress_ptr cinfo)
 /* Change the pointer lists to duplicate the last sample row at the bottom
  * of the image.  whichptr indicates which xbuffer holds the final iMCU row.
@@ -303,7 +303,7 @@ set_bottom_pointers (j_decompress_ptr cinfo)
  * Initialize for a processing pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_main (j_decompress_ptr cinfo, J_BUF_MODE pass_mode)
 {
   my_main_ptr jmain = (my_main_ptr) cinfo->main;
@@ -341,7 +341,7 @@ start_pass_main (j_decompress_ptr cinfo, J_BUF_MODE pass_mode)
  * This handles the simple case where no context is required.
  */
 
-METHODDEF void
+METHODDEF(void)
 process_data_simple_main (j_decompress_ptr cinfo,
 			  JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
 			  JDIMENSION out_rows_avail)
@@ -349,7 +349,7 @@ process_data_simple_main (j_decompress_ptr cinfo,
   my_main_ptr jmain = (my_main_ptr) cinfo->main;
   JDIMENSION rowgroups_avail;
 
-  /* Read input data if we haven't filled the main buffer yet */
+  /* Read input data if we haven't filled the jmain buffer yet */
   if (! jmain->buffer_full) {
     if (! (*cinfo->coef->decompress_data) (cinfo, jmain->buffer))
       return;			/* suspension forced, can do nothing more */
@@ -381,14 +381,14 @@ process_data_simple_main (j_decompress_ptr cinfo,
  * This handles the case where context rows must be provided.
  */
 
-METHODDEF void
+METHODDEF(void)
 process_data_context_main (j_decompress_ptr cinfo,
 			   JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
 			   JDIMENSION out_rows_avail)
 {
   my_main_ptr jmain = (my_main_ptr) cinfo->main;
 
-  /* Read input data if we haven't filled the main buffer yet */
+  /* Read input data if we haven't filled the jmain buffer yet */
   if (! jmain->buffer_full) {
     if (! (*cinfo->coef->decompress_data) (cinfo,
 					   jmain->xbuffer[jmain->whichptr]))
@@ -455,7 +455,7 @@ process_data_context_main (j_decompress_ptr cinfo,
 
 #ifdef QUANT_2PASS_SUPPORTED
 
-METHODDEF void
+METHODDEF(void)
 process_data_crank_post (j_decompress_ptr cinfo,
 			 JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
 			 JDIMENSION out_rows_avail)
@@ -469,10 +469,10 @@ process_data_crank_post (j_decompress_ptr cinfo,
 
 
 /*
- * Initialize main buffer controller.
+ * Initialize jmain buffer controller.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_d_main_controller (j_decompress_ptr cinfo, boolean need_full_buffer)
 {
   my_main_ptr jmain;
diff --git a/code/jpeg-6/jdmarker.c b/code/jpeg-6b/jdmarker.c
index 80e5f78..f4cca8c 100644
--- a/code/jpeg-6/jdmarker.c
+++ b/code/jpeg-6b/jdmarker.c
@@ -1,7 +1,7 @@
 /*
  * jdmarker.c
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1998, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -85,6 +85,28 @@ typedef enum {			/* JPEG marker codes */
 } JPEG_MARKER;
 
 
+/* Private state */
+
+typedef struct {
+  struct jpeg_marker_reader pub; /* public fields */
+
+  /* Application-overridable marker processing methods */
+  jpeg_marker_parser_method process_COM;
+  jpeg_marker_parser_method process_APPn[16];
+
+  /* Limit on marker data length to save for each marker type */
+  unsigned int length_limit_COM;
+  unsigned int length_limit_APPn[16];
+
+  /* Status of COM/APPn marker saving */
+  jpeg_saved_marker_ptr cur_marker;	/* NULL if not processing a marker */
+  unsigned int bytes_read;		/* data bytes read so far in marker */
+  /* Note: cur_marker is not linked into marker_list until it's all read. */
+} my_marker_reader;
+
+typedef my_marker_reader * my_marker_ptr;
+
+
 /*
  * Macros for fetching data from the data source module.
  *
@@ -104,7 +126,7 @@ typedef enum {			/* JPEG marker codes */
 	( datasrc->next_input_byte = next_input_byte,  \
 	  datasrc->bytes_in_buffer = bytes_in_buffer )
 
-/* Reload the local copies --- seldom used except in MAKE_BYTE_AVAIL */
+/* Reload the local copies --- used only in MAKE_BYTE_AVAIL */
 #define INPUT_RELOAD(cinfo)  \
 	( next_input_byte = datasrc->next_input_byte,  \
 	  bytes_in_buffer = datasrc->bytes_in_buffer )
@@ -118,14 +140,14 @@ typedef enum {			/* JPEG marker codes */
 	  if (! (*datasrc->fill_input_buffer) (cinfo))  \
 	    { action; }  \
 	  INPUT_RELOAD(cinfo);  \
-	}  \
-	bytes_in_buffer--
+	}
 
 /* Read a byte into variable V.
  * If must suspend, take the specified action (typically "return FALSE").
  */
 #define INPUT_BYTE(cinfo,V,action)  \
 	MAKESTMT( MAKE_BYTE_AVAIL(cinfo,action); \
+		  bytes_in_buffer--; \
 		  V = GETJOCTET(*next_input_byte++); )
 
 /* As above, but read two bytes interpreted as an unsigned 16-bit integer.
@@ -133,8 +155,10 @@ typedef enum {			/* JPEG marker codes */
  */
 #define INPUT_2BYTES(cinfo,V,action)  \
 	MAKESTMT( MAKE_BYTE_AVAIL(cinfo,action); \
+		  bytes_in_buffer--; \
 		  V = ((unsigned int) GETJOCTET(*next_input_byte++)) << 8; \
 		  MAKE_BYTE_AVAIL(cinfo,action); \
+		  bytes_in_buffer--; \
 		  V += GETJOCTET(*next_input_byte++); )
 
 
@@ -150,11 +174,18 @@ typedef enum {			/* JPEG marker codes */
  *   marker parameters; restart point has not been moved.  Same routine
  *   will be called again after application supplies more input data.
  *
- * This approach to suspension assumes that all of a marker's parameters can
- * fit into a single input bufferload.  This should hold for "normal"
- * markers.  Some COM/APPn markers might have large parameter segments,
- * but we use skip_input_data to get past those, and thereby put the problem
- * on the source manager's shoulders.
+ * This approach to suspension assumes that all of a marker's parameters
+ * can fit into a single input bufferload.  This should hold for "normal"
+ * markers.  Some COM/APPn markers might have large parameter segments
+ * that might not fit.  If we are simply dropping such a marker, we use
+ * skip_input_data to get past it, and thereby put the problem on the
+ * source manager's shoulders.  If we are saving the marker's contents
+ * into memory, we use a slightly different convention: when forced to
+ * suspend, the marker processor updates the restart point to the end of
+ * what it's consumed (ie, the end of the buffer) before returning FALSE.
+ * On resumption, cinfo->unread_marker still contains the marker code,
+ * but the data source will point to the next chunk of marker data.
+ * The marker processor must retain internal state to deal with this.
  *
  * Note that we don't bother to avoid duplicate trace messages if a
  * suspension occurs within marker parameters.  Other side effects
@@ -162,7 +193,7 @@ typedef enum {			/* JPEG marker codes */
  */
 
 
-LOCAL boolean
+LOCAL(boolean)
 get_soi (j_decompress_ptr cinfo)
 /* Process an SOI marker */
 {
@@ -188,7 +219,9 @@ get_soi (j_decompress_ptr cinfo)
   cinfo->CCIR601_sampling = FALSE; /* Assume non-CCIR sampling??? */
 
   cinfo->saw_JFIF_marker = FALSE;
-  cinfo->density_unit = 0;	/* set default JFIF APP0 values */
+  cinfo->JFIF_major_version = 1; /* set default JFIF APP0 values */
+  cinfo->JFIF_minor_version = 1;
+  cinfo->density_unit = 0;
   cinfo->X_density = 1;
   cinfo->Y_density = 1;
   cinfo->saw_Adobe_marker = FALSE;
@@ -200,7 +233,7 @@ get_soi (j_decompress_ptr cinfo)
 }
 
 
-LOCAL boolean
+LOCAL(boolean)
 get_sof (j_decompress_ptr cinfo, boolean is_prog, boolean is_arith)
 /* Process a SOFn marker */
 {
@@ -264,7 +297,7 @@ get_sof (j_decompress_ptr cinfo, boolean is_prog, boolean is_arith)
 }
 
 
-LOCAL boolean
+LOCAL(boolean)
 get_sos (j_decompress_ptr cinfo)
 /* Process a SOS marker */
 {
@@ -280,11 +313,11 @@ get_sos (j_decompress_ptr cinfo)
 
   INPUT_BYTE(cinfo, n, return FALSE); /* Number of components */
 
+  TRACEMS1(cinfo, 1, JTRC_SOS, n);
+
   if (length != (n * 2 + 6) || n < 1 || n > MAX_COMPS_IN_SCAN)
     ERREXIT(cinfo, JERR_BAD_LENGTH);
 
-  TRACEMS1(cinfo, 1, JTRC_SOS, n);
-
   cinfo->comps_in_scan = n;
 
   /* Collect the component-spec parameters */
@@ -334,113 +367,9 @@ get_sos (j_decompress_ptr cinfo)
 }
 
 
-METHODDEF boolean
-get_app0 (j_decompress_ptr cinfo)
-/* Process an APP0 marker */
-{
-#define JFIF_LEN 14
-  INT32 length;
-  UINT8 b[JFIF_LEN];
-  int buffp;
-  INPUT_VARS(cinfo);
-
-  INPUT_2BYTES(cinfo, length, return FALSE);
-  length -= 2;
-
-  /* See if a JFIF APP0 marker is present */
-
-  if (length >= JFIF_LEN) {
-    for (buffp = 0; buffp < JFIF_LEN; buffp++)
-      INPUT_BYTE(cinfo, b[buffp], return FALSE);
-    length -= JFIF_LEN;
-
-    if (b[0]==0x4A && b[1]==0x46 && b[2]==0x49 && b[3]==0x46 && b[4]==0) {
-      /* Found JFIF APP0 marker: check version */
-      /* Major version must be 1, anything else signals an incompatible change.
-       * We used to treat this as an error, but now it's a nonfatal warning,
-       * because some bozo at Hijaak couldn't read the spec.
-       * Minor version should be 0..2, but process anyway if newer.
-       */
-      if (b[5] != 1)
-	WARNMS2(cinfo, JWRN_JFIF_MAJOR, b[5], b[6]);
-      else if (b[6] > 2)
-	TRACEMS2(cinfo, 1, JTRC_JFIF_MINOR, b[5], b[6]);
-      /* Save info */
-      cinfo->saw_JFIF_marker = TRUE;
-      cinfo->density_unit = b[7];
-      cinfo->X_density = (b[8] << 8) + b[9];
-      cinfo->Y_density = (b[10] << 8) + b[11];
-      TRACEMS3(cinfo, 1, JTRC_JFIF,
-	       cinfo->X_density, cinfo->Y_density, cinfo->density_unit);
-      if (b[12] | b[13])
-	TRACEMS2(cinfo, 1, JTRC_JFIF_THUMBNAIL, b[12], b[13]);
-      if (length != ((INT32) b[12] * (INT32) b[13] * (INT32) 3))
-	TRACEMS1(cinfo, 1, JTRC_JFIF_BADTHUMBNAILSIZE, (int) length);
-    } else {
-      /* Start of APP0 does not match "JFIF" */
-      TRACEMS1(cinfo, 1, JTRC_APP0, (int) length + JFIF_LEN);
-    }
-  } else {
-    /* Too short to be JFIF marker */
-    TRACEMS1(cinfo, 1, JTRC_APP0, (int) length);
-  }
-
-  INPUT_SYNC(cinfo);
-  if (length > 0)		/* skip any remaining data -- could be lots */
-    (*cinfo->src->skip_input_data) (cinfo, (long) length);
-
-  return TRUE;
-}
-
-
-METHODDEF boolean
-get_app14 (j_decompress_ptr cinfo)
-/* Process an APP14 marker */
-{
-#define ADOBE_LEN 12
-  INT32 length;
-  UINT8 b[ADOBE_LEN];
-  int buffp;
-  unsigned int version, flags0, flags1, transform;
-  INPUT_VARS(cinfo);
-
-  INPUT_2BYTES(cinfo, length, return FALSE);
-  length -= 2;
+#ifdef D_ARITH_CODING_SUPPORTED
 
-  /* See if an Adobe APP14 marker is present */
-
-  if (length >= ADOBE_LEN) {
-    for (buffp = 0; buffp < ADOBE_LEN; buffp++)
-      INPUT_BYTE(cinfo, b[buffp], return FALSE);
-    length -= ADOBE_LEN;
-
-    if (b[0]==0x41 && b[1]==0x64 && b[2]==0x6F && b[3]==0x62 && b[4]==0x65) {
-      /* Found Adobe APP14 marker */
-      version = (b[5] << 8) + b[6];
-      flags0 = (b[7] << 8) + b[8];
-      flags1 = (b[9] << 8) + b[10];
-      transform = b[11];
-      TRACEMS4(cinfo, 1, JTRC_ADOBE, version, flags0, flags1, transform);
-      cinfo->saw_Adobe_marker = TRUE;
-      cinfo->Adobe_transform = (UINT8) transform;
-    } else {
-      /* Start of APP14 does not match "Adobe" */
-      TRACEMS1(cinfo, 1, JTRC_APP14, (int) length + ADOBE_LEN);
-    }
-  } else {
-    /* Too short to be Adobe marker */
-    TRACEMS1(cinfo, 1, JTRC_APP14, (int) length);
-  }
-
-  INPUT_SYNC(cinfo);
-  if (length > 0)		/* skip any remaining data -- could be lots */
-    (*cinfo->src->skip_input_data) (cinfo, (long) length);
-
-  return TRUE;
-}
-
-
-LOCAL boolean
+LOCAL(boolean)
 get_dac (j_decompress_ptr cinfo)
 /* Process a DAC marker */
 {
@@ -472,12 +401,21 @@ get_dac (j_decompress_ptr cinfo)
     }
   }
 
+  if (length != 0)
+    ERREXIT(cinfo, JERR_BAD_LENGTH);
+
   INPUT_SYNC(cinfo);
   return TRUE;
 }
 
+#else /* ! D_ARITH_CODING_SUPPORTED */
+
+#define get_dac(cinfo)  skip_variable(cinfo)
 
-LOCAL boolean
+#endif /* D_ARITH_CODING_SUPPORTED */
+
+
+LOCAL(boolean)
 get_dht (j_decompress_ptr cinfo)
 /* Process a DHT marker */
 {
@@ -491,7 +429,7 @@ get_dht (j_decompress_ptr cinfo)
   INPUT_2BYTES(cinfo, length, return FALSE);
   length -= 2;
   
-  while (length > 0) {
+  while (length > 16) {
     INPUT_BYTE(cinfo, index, return FALSE);
 
     TRACEMS1(cinfo, 1, JTRC_DHT, index);
@@ -512,8 +450,11 @@ get_dht (j_decompress_ptr cinfo)
 	     bits[9], bits[10], bits[11], bits[12],
 	     bits[13], bits[14], bits[15], bits[16]);
 
+    /* Here we just do minimal validation of the counts to avoid walking
+     * off the end of our table space.  jdhuff.c will check more carefully.
+     */
     if (count > 256 || ((INT32) count) > length)
-      ERREXIT(cinfo, JERR_DHT_COUNTS);
+      ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
 
     for (i = 0; i < count; i++)
       INPUT_BYTE(cinfo, huffval[i], return FALSE);
@@ -537,12 +478,15 @@ get_dht (j_decompress_ptr cinfo)
     MEMCOPY((*htblptr)->huffval, huffval, SIZEOF((*htblptr)->huffval));
   }
 
+  if (length != 0)
+    ERREXIT(cinfo, JERR_BAD_LENGTH);
+
   INPUT_SYNC(cinfo);
   return TRUE;
 }
 
 
-LOCAL boolean
+LOCAL(boolean)
 get_dqt (j_decompress_ptr cinfo)
 /* Process a DQT marker */
 {
@@ -574,27 +518,33 @@ get_dqt (j_decompress_ptr cinfo)
 	INPUT_2BYTES(cinfo, tmp, return FALSE);
       else
 	INPUT_BYTE(cinfo, tmp, return FALSE);
-      quant_ptr->quantval[i] = (UINT16) tmp;
+      /* We convert the zigzag-order table to natural array order. */
+      quant_ptr->quantval[jpeg_natural_order[i]] = (UINT16) tmp;
     }
 
-    for (i = 0; i < DCTSIZE2; i += 8) {
-      TRACEMS8(cinfo, 2, JTRC_QUANTVALS,
-	       quant_ptr->quantval[i  ], quant_ptr->quantval[i+1],
-	       quant_ptr->quantval[i+2], quant_ptr->quantval[i+3],
-	       quant_ptr->quantval[i+4], quant_ptr->quantval[i+5],
-	       quant_ptr->quantval[i+6], quant_ptr->quantval[i+7]);
+    if (cinfo->err->trace_level >= 2) {
+      for (i = 0; i < DCTSIZE2; i += 8) {
+	TRACEMS8(cinfo, 2, JTRC_QUANTVALS,
+		 quant_ptr->quantval[i],   quant_ptr->quantval[i+1],
+		 quant_ptr->quantval[i+2], quant_ptr->quantval[i+3],
+		 quant_ptr->quantval[i+4], quant_ptr->quantval[i+5],
+		 quant_ptr->quantval[i+6], quant_ptr->quantval[i+7]);
+      }
     }
 
     length -= DCTSIZE2+1;
     if (prec) length -= DCTSIZE2;
   }
 
+  if (length != 0)
+    ERREXIT(cinfo, JERR_BAD_LENGTH);
+
   INPUT_SYNC(cinfo);
   return TRUE;
 }
 
 
-LOCAL boolean
+LOCAL(boolean)
 get_dri (j_decompress_ptr cinfo)
 /* Process a DRI marker */
 {
@@ -618,7 +568,280 @@ get_dri (j_decompress_ptr cinfo)
 }
 
 
-METHODDEF boolean
+/*
+ * Routines for processing APPn and COM markers.
+ * These are either saved in memory or discarded, per application request.
+ * APP0 and APP14 are specially checked to see if they are
+ * JFIF and Adobe markers, respectively.
+ */
+
+#define APP0_DATA_LEN	14	/* Length of interesting data in APP0 */
+#define APP14_DATA_LEN	12	/* Length of interesting data in APP14 */
+#define APPN_DATA_LEN	14	/* Must be the largest of the above!! */
+
+
+LOCAL(void)
+examine_app0 (j_decompress_ptr cinfo, JOCTET FAR * data,
+	      unsigned int datalen, INT32 remaining)
+/* Examine first few bytes from an APP0.
+ * Take appropriate action if it is a JFIF marker.
+ * datalen is # of bytes at data[], remaining is length of rest of marker data.
+ */
+{
+  INT32 totallen = (INT32) datalen + remaining;
+
+  if (datalen >= APP0_DATA_LEN &&
+      GETJOCTET(data[0]) == 0x4A &&
+      GETJOCTET(data[1]) == 0x46 &&
+      GETJOCTET(data[2]) == 0x49 &&
+      GETJOCTET(data[3]) == 0x46 &&
+      GETJOCTET(data[4]) == 0) {
+    /* Found JFIF APP0 marker: save info */
+    cinfo->saw_JFIF_marker = TRUE;
+    cinfo->JFIF_major_version = GETJOCTET(data[5]);
+    cinfo->JFIF_minor_version = GETJOCTET(data[6]);
+    cinfo->density_unit = GETJOCTET(data[7]);
+    cinfo->X_density = (GETJOCTET(data[8]) << 8) + GETJOCTET(data[9]);
+    cinfo->Y_density = (GETJOCTET(data[10]) << 8) + GETJOCTET(data[11]);
+    /* Check version.
+     * Major version must be 1, anything else signals an incompatible change.
+     * (We used to treat this as an error, but now it's a nonfatal warning,
+     * because some bozo at Hijaak couldn't read the spec.)
+     * Minor version should be 0..2, but process anyway if newer.
+     */
+    if (cinfo->JFIF_major_version != 1)
+      WARNMS2(cinfo, JWRN_JFIF_MAJOR,
+	      cinfo->JFIF_major_version, cinfo->JFIF_minor_version);
+    /* Generate trace messages */
+    TRACEMS5(cinfo, 1, JTRC_JFIF,
+	     cinfo->JFIF_major_version, cinfo->JFIF_minor_version,
+	     cinfo->X_density, cinfo->Y_density, cinfo->density_unit);
+    /* Validate thumbnail dimensions and issue appropriate messages */
+    if (GETJOCTET(data[12]) | GETJOCTET(data[13]))
+      TRACEMS2(cinfo, 1, JTRC_JFIF_THUMBNAIL,
+	       GETJOCTET(data[12]), GETJOCTET(data[13]));
+    totallen -= APP0_DATA_LEN;
+    if (totallen !=
+	((INT32)GETJOCTET(data[12]) * (INT32)GETJOCTET(data[13]) * (INT32) 3))
+      TRACEMS1(cinfo, 1, JTRC_JFIF_BADTHUMBNAILSIZE, (int) totallen);
+  } else if (datalen >= 6 &&
+      GETJOCTET(data[0]) == 0x4A &&
+      GETJOCTET(data[1]) == 0x46 &&
+      GETJOCTET(data[2]) == 0x58 &&
+      GETJOCTET(data[3]) == 0x58 &&
+      GETJOCTET(data[4]) == 0) {
+    /* Found JFIF "JFXX" extension APP0 marker */
+    /* The library doesn't actually do anything with these,
+     * but we try to produce a helpful trace message.
+     */
+    switch (GETJOCTET(data[5])) {
+    case 0x10:
+      TRACEMS1(cinfo, 1, JTRC_THUMB_JPEG, (int) totallen);
+      break;
+    case 0x11:
+      TRACEMS1(cinfo, 1, JTRC_THUMB_PALETTE, (int) totallen);
+      break;
+    case 0x13:
+      TRACEMS1(cinfo, 1, JTRC_THUMB_RGB, (int) totallen);
+      break;
+    default:
+      TRACEMS2(cinfo, 1, JTRC_JFIF_EXTENSION,
+	       GETJOCTET(data[5]), (int) totallen);
+      break;
+    }
+  } else {
+    /* Start of APP0 does not match "JFIF" or "JFXX", or too short */
+    TRACEMS1(cinfo, 1, JTRC_APP0, (int) totallen);
+  }
+}
+
+
+LOCAL(void)
+examine_app14 (j_decompress_ptr cinfo, JOCTET FAR * data,
+	       unsigned int datalen, INT32 remaining)
+/* Examine first few bytes from an APP14.
+ * Take appropriate action if it is an Adobe marker.
+ * datalen is # of bytes at data[], remaining is length of rest of marker data.
+ */
+{
+  unsigned int version, flags0, flags1, transform;
+
+  if (datalen >= APP14_DATA_LEN &&
+      GETJOCTET(data[0]) == 0x41 &&
+      GETJOCTET(data[1]) == 0x64 &&
+      GETJOCTET(data[2]) == 0x6F &&
+      GETJOCTET(data[3]) == 0x62 &&
+      GETJOCTET(data[4]) == 0x65) {
+    /* Found Adobe APP14 marker */
+    version = (GETJOCTET(data[5]) << 8) + GETJOCTET(data[6]);
+    flags0 = (GETJOCTET(data[7]) << 8) + GETJOCTET(data[8]);
+    flags1 = (GETJOCTET(data[9]) << 8) + GETJOCTET(data[10]);
+    transform = GETJOCTET(data[11]);
+    TRACEMS4(cinfo, 1, JTRC_ADOBE, version, flags0, flags1, transform);
+    cinfo->saw_Adobe_marker = TRUE;
+    cinfo->Adobe_transform = (UINT8) transform;
+  } else {
+    /* Start of APP14 does not match "Adobe", or too short */
+    TRACEMS1(cinfo, 1, JTRC_APP14, (int) (datalen + remaining));
+  }
+}
+
+
+METHODDEF(boolean)
+get_interesting_appn (j_decompress_ptr cinfo)
+/* Process an APP0 or APP14 marker without saving it */
+{
+  INT32 length;
+  JOCTET b[APPN_DATA_LEN];
+  unsigned int i, numtoread;
+  INPUT_VARS(cinfo);
+
+  INPUT_2BYTES(cinfo, length, return FALSE);
+  length -= 2;
+
+  /* get the interesting part of the marker data */
+  if (length >= APPN_DATA_LEN)
+    numtoread = APPN_DATA_LEN;
+  else if (length > 0)
+    numtoread = (unsigned int) length;
+  else
+    numtoread = 0;
+  for (i = 0; i < numtoread; i++)
+    INPUT_BYTE(cinfo, b[i], return FALSE);
+  length -= numtoread;
+
+  /* process it */
+  switch (cinfo->unread_marker) {
+  case M_APP0:
+    examine_app0(cinfo, (JOCTET FAR *) b, numtoread, length);
+    break;
+  case M_APP14:
+    examine_app14(cinfo, (JOCTET FAR *) b, numtoread, length);
+    break;
+  default:
+    /* can't get here unless jpeg_save_markers chooses wrong processor */
+    ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, cinfo->unread_marker);
+    break;
+  }
+
+  /* skip any remaining data -- could be lots */
+  INPUT_SYNC(cinfo);
+  if (length > 0)
+    (*cinfo->src->skip_input_data) (cinfo, (long) length);
+
+  return TRUE;
+}
+
+
+#ifdef SAVE_MARKERS_SUPPORTED
+
+METHODDEF(boolean)
+save_marker (j_decompress_ptr cinfo)
+/* Save an APPn or COM marker into the marker list */
+{
+  my_marker_ptr marker = (my_marker_ptr) cinfo->marker;
+  jpeg_saved_marker_ptr cur_marker = marker->cur_marker;
+  unsigned int bytes_read, data_length;
+  JOCTET FAR * data;
+  INT32 length = 0;
+  INPUT_VARS(cinfo);
+
+  if (cur_marker == NULL) {
+    /* begin reading a marker */
+    INPUT_2BYTES(cinfo, length, return FALSE);
+    length -= 2;
+    if (length >= 0) {		/* watch out for bogus length word */
+      /* figure out how much we want to save */
+      unsigned int limit;
+      if (cinfo->unread_marker == (int) M_COM)
+	limit = marker->length_limit_COM;
+      else
+	limit = marker->length_limit_APPn[cinfo->unread_marker - (int) M_APP0];
+      if ((unsigned int) length < limit)
+	limit = (unsigned int) length;
+      /* allocate and initialize the marker item */
+      cur_marker = (jpeg_saved_marker_ptr)
+	(*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				    SIZEOF(struct jpeg_marker_struct) + limit);
+      cur_marker->next = NULL;
+      cur_marker->marker = (UINT8) cinfo->unread_marker;
+      cur_marker->original_length = (unsigned int) length;
+      cur_marker->data_length = limit;
+      /* data area is just beyond the jpeg_marker_struct */
+      data = cur_marker->data = (JOCTET FAR *) (cur_marker + 1);
+      marker->cur_marker = cur_marker;
+      marker->bytes_read = 0;
+      bytes_read = 0;
+      data_length = limit;
+    } else {
+      /* deal with bogus length word */
+      bytes_read = data_length = 0;
+      data = NULL;
+    }
+  } else {
+    /* resume reading a marker */
+    bytes_read = marker->bytes_read;
+    data_length = cur_marker->data_length;
+    data = cur_marker->data + bytes_read;
+  }
+
+  while (bytes_read < data_length) {
+    INPUT_SYNC(cinfo);		/* move the restart point to here */
+    marker->bytes_read = bytes_read;
+    /* If there's not at least one byte in buffer, suspend */
+    MAKE_BYTE_AVAIL(cinfo, return FALSE);
+    /* Copy bytes with reasonable rapidity */
+    while (bytes_read < data_length && bytes_in_buffer > 0) {
+      *data++ = *next_input_byte++;
+      bytes_in_buffer--;
+      bytes_read++;
+    }
+  }
+
+  /* Done reading what we want to read */
+  if (cur_marker != NULL) {	/* will be NULL if bogus length word */
+    /* Add new marker to end of list */
+    if (cinfo->marker_list == NULL) {
+      cinfo->marker_list = cur_marker;
+    } else {
+      jpeg_saved_marker_ptr prev = cinfo->marker_list;
+      while (prev->next != NULL)
+	prev = prev->next;
+      prev->next = cur_marker;
+    }
+    /* Reset pointer & calc remaining data length */
+    data = cur_marker->data;
+    length = cur_marker->original_length - data_length;
+  }
+  /* Reset to initial state for next marker */
+  marker->cur_marker = NULL;
+
+  /* Process the marker if interesting; else just make a generic trace msg */
+  switch (cinfo->unread_marker) {
+  case M_APP0:
+    examine_app0(cinfo, data, data_length, length);
+    break;
+  case M_APP14:
+    examine_app14(cinfo, data, data_length, length);
+    break;
+  default:
+    TRACEMS2(cinfo, 1, JTRC_MISC_MARKER, cinfo->unread_marker,
+	     (int) (data_length + length));
+    break;
+  }
+
+  /* skip any remaining data -- could be lots */
+  INPUT_SYNC(cinfo);		/* do before skip_input_data */
+  if (length > 0)
+    (*cinfo->src->skip_input_data) (cinfo, (long) length);
+
+  return TRUE;
+}
+
+#endif /* SAVE_MARKERS_SUPPORTED */
+
+
+METHODDEF(boolean)
 skip_variable (j_decompress_ptr cinfo)
 /* Skip over an unknown or uninteresting variable-length marker */
 {
@@ -626,11 +849,13 @@ skip_variable (j_decompress_ptr cinfo)
   INPUT_VARS(cinfo);
 
   INPUT_2BYTES(cinfo, length, return FALSE);
+  length -= 2;
   
   TRACEMS2(cinfo, 1, JTRC_MISC_MARKER, cinfo->unread_marker, (int) length);
 
   INPUT_SYNC(cinfo);		/* do before skip_input_data */
-  (*cinfo->src->skip_input_data) (cinfo, (long) length - 2L);
+  if (length > 0)
+    (*cinfo->src->skip_input_data) (cinfo, (long) length);
 
   return TRUE;
 }
@@ -645,7 +870,7 @@ skip_variable (j_decompress_ptr cinfo)
  * but it will never be 0 or FF.
  */
 
-LOCAL boolean
+LOCAL(boolean)
 next_marker (j_decompress_ptr cinfo)
 {
   int c;
@@ -692,7 +917,7 @@ next_marker (j_decompress_ptr cinfo)
 }
 
 
-LOCAL boolean
+LOCAL(boolean)
 first_marker (j_decompress_ptr cinfo)
 /* Like next_marker, but used to obtain the initial SOI marker. */
 /* For this marker, we do not allow preceding garbage or fill; otherwise,
@@ -723,7 +948,7 @@ first_marker (j_decompress_ptr cinfo)
  * JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.
  */
 
-METHODDEF int
+METHODDEF(int)
 read_markers (j_decompress_ptr cinfo)
 {
   /* Outer loop repeats once for each marker. */
@@ -830,12 +1055,13 @@ read_markers (j_decompress_ptr cinfo)
     case M_APP13:
     case M_APP14:
     case M_APP15:
-      if (! (*cinfo->marker->process_APPn[cinfo->unread_marker - (int) M_APP0]) (cinfo))
+      if (! (*((my_marker_ptr) cinfo->marker)->process_APPn[
+		cinfo->unread_marker - (int) M_APP0]) (cinfo))
 	return JPEG_SUSPENDED;
       break;
       
     case M_COM:
-      if (! (*cinfo->marker->process_COM) (cinfo))
+      if (! (*((my_marker_ptr) cinfo->marker)->process_COM) (cinfo))
 	return JPEG_SUSPENDED;
       break;
 
@@ -883,7 +1109,7 @@ read_markers (j_decompress_ptr cinfo)
  * it holds a marker which the decoder will be unable to read past.
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 read_restart_marker (j_decompress_ptr cinfo)
 {
   /* Obtain a marker unless we already did. */
@@ -896,7 +1122,7 @@ read_restart_marker (j_decompress_ptr cinfo)
   if (cinfo->unread_marker ==
       ((int) M_RST0 + cinfo->marker->next_restart_num)) {
     /* Normal case --- swallow the marker and let entropy decoder continue */
-    TRACEMS1(cinfo, 2, JTRC_RST, cinfo->marker->next_restart_num);
+    TRACEMS1(cinfo, 3, JTRC_RST, cinfo->marker->next_restart_num);
     cinfo->unread_marker = 0;
   } else {
     /* Uh-oh, the restart markers have been messed up. */
@@ -962,7 +1188,7 @@ read_restart_marker (j_decompress_ptr cinfo)
  * any other marker would have to be bogus data in that case.
  */
 
-GLOBAL boolean
+GLOBAL(boolean)
 jpeg_resync_to_restart (j_decompress_ptr cinfo, int desired)
 {
   int marker = cinfo->unread_marker;
@@ -1012,15 +1238,18 @@ jpeg_resync_to_restart (j_decompress_ptr cinfo, int desired)
  * Reset marker processing state to begin a fresh datastream.
  */
 
-METHODDEF void
+METHODDEF(void)
 reset_marker_reader (j_decompress_ptr cinfo)
 {
+  my_marker_ptr marker = (my_marker_ptr) cinfo->marker;
+
   cinfo->comp_info = NULL;		/* until allocated by get_sof */
   cinfo->input_scan_number = 0;		/* no SOS seen yet */
   cinfo->unread_marker = 0;		/* no pending marker */
-  cinfo->marker->saw_SOI = FALSE;	/* set internal state too */
-  cinfo->marker->saw_SOF = FALSE;
-  cinfo->marker->discarded_bytes = 0;
+  marker->pub.saw_SOI = FALSE;		/* set internal state too */
+  marker->pub.saw_SOF = FALSE;
+  marker->pub.discarded_bytes = 0;
+  marker->cur_marker = NULL;
 }
 
 
@@ -1029,24 +1258,103 @@ reset_marker_reader (j_decompress_ptr cinfo)
  * This is called only once, when the decompression object is created.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_marker_reader (j_decompress_ptr cinfo)
 {
+  my_marker_ptr marker;
   int i;
 
   /* Create subobject in permanent pool */
-  cinfo->marker = (struct jpeg_marker_reader *)
+  marker = (my_marker_ptr)
     (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
-				SIZEOF(struct jpeg_marker_reader));
-  /* Initialize method pointers */
-  cinfo->marker->reset_marker_reader = reset_marker_reader;
-  cinfo->marker->read_markers = read_markers;
-  cinfo->marker->read_restart_marker = read_restart_marker;
-  cinfo->marker->process_COM = skip_variable;
-  for (i = 0; i < 16; i++)
-    cinfo->marker->process_APPn[i] = skip_variable;
-  cinfo->marker->process_APPn[0] = get_app0;
-  cinfo->marker->process_APPn[14] = get_app14;
+				SIZEOF(my_marker_reader));
+  cinfo->marker = (struct jpeg_marker_reader *) marker;
+  /* Initialize public method pointers */
+  marker->pub.reset_marker_reader = reset_marker_reader;
+  marker->pub.read_markers = read_markers;
+  marker->pub.read_restart_marker = read_restart_marker;
+  /* Initialize COM/APPn processing.
+   * By default, we examine and then discard APP0 and APP14,
+   * but simply discard COM and all other APPn.
+   */
+  marker->process_COM = skip_variable;
+  marker->length_limit_COM = 0;
+  for (i = 0; i < 16; i++) {
+    marker->process_APPn[i] = skip_variable;
+    marker->length_limit_APPn[i] = 0;
+  }
+  marker->process_APPn[0] = get_interesting_appn;
+  marker->process_APPn[14] = get_interesting_appn;
   /* Reset marker processing state */
   reset_marker_reader(cinfo);
 }
+
+
+/*
+ * Control saving of COM and APPn markers into marker_list.
+ */
+
+#ifdef SAVE_MARKERS_SUPPORTED
+
+GLOBAL(void)
+jpeg_save_markers (j_decompress_ptr cinfo, int marker_code,
+		   unsigned int length_limit)
+{
+  my_marker_ptr marker = (my_marker_ptr) cinfo->marker;
+  long maxlength;
+  jpeg_marker_parser_method processor;
+
+  /* Length limit mustn't be larger than what we can allocate
+   * (should only be a concern in a 16-bit environment).
+   */
+  maxlength = cinfo->mem->max_alloc_chunk - SIZEOF(struct jpeg_marker_struct);
+  if (((long) length_limit) > maxlength)
+    length_limit = (unsigned int) maxlength;
+
+  /* Choose processor routine to use.
+   * APP0/APP14 have special requirements.
+   */
+  if (length_limit) {
+    processor = save_marker;
+    /* If saving APP0/APP14, save at least enough for our internal use. */
+    if (marker_code == (int) M_APP0 && length_limit < APP0_DATA_LEN)
+      length_limit = APP0_DATA_LEN;
+    else if (marker_code == (int) M_APP14 && length_limit < APP14_DATA_LEN)
+      length_limit = APP14_DATA_LEN;
+  } else {
+    processor = skip_variable;
+    /* If discarding APP0/APP14, use our regular on-the-fly processor. */
+    if (marker_code == (int) M_APP0 || marker_code == (int) M_APP14)
+      processor = get_interesting_appn;
+  }
+
+  if (marker_code == (int) M_COM) {
+    marker->process_COM = processor;
+    marker->length_limit_COM = length_limit;
+  } else if (marker_code >= (int) M_APP0 && marker_code <= (int) M_APP15) {
+    marker->process_APPn[marker_code - (int) M_APP0] = processor;
+    marker->length_limit_APPn[marker_code - (int) M_APP0] = length_limit;
+  } else
+    ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, marker_code);
+}
+
+#endif /* SAVE_MARKERS_SUPPORTED */
+
+
+/*
+ * Install a special processing method for COM or APPn markers.
+ */
+
+GLOBAL(void)
+jpeg_set_marker_processor (j_decompress_ptr cinfo, int marker_code,
+			   jpeg_marker_parser_method routine)
+{
+  my_marker_ptr marker = (my_marker_ptr) cinfo->marker;
+
+  if (marker_code == (int) M_COM)
+    marker->process_COM = routine;
+  else if (marker_code >= (int) M_APP0 && marker_code <= (int) M_APP15)
+    marker->process_APPn[marker_code - (int) M_APP0] = routine;
+  else
+    ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, marker_code);
+}
diff --git a/code/jpeg-6/jdmaster.c b/code/jpeg-6b/jdmaster.c
index 18e0880..2802c5b 100644
--- a/code/jpeg-6/jdmaster.c
+++ b/code/jpeg-6b/jdmaster.c
@@ -1,7 +1,7 @@
 /*
  * jdmaster.c
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -40,7 +40,7 @@ typedef my_decomp_master * my_master_ptr;
  * CRUCIAL: this must match the actual capabilities of jdmerge.c!
  */
 
-LOCAL boolean
+LOCAL(boolean)
 use_merged_upsample (j_decompress_ptr cinfo)
 {
 #ifdef UPSAMPLE_MERGING_SUPPORTED
@@ -80,11 +80,11 @@ use_merged_upsample (j_decompress_ptr cinfo)
  * Also note that it may be called before the master module is initialized!
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_calc_output_dimensions (j_decompress_ptr cinfo)
 /* Do computations that are needed before master selection phase */
 {
-#if 0	// JDC: commented out to remove warning
+#ifdef IDCT_SCALING_SUPPORTED
   int ci;
   jpeg_component_info *compptr;
 #endif
@@ -244,7 +244,7 @@ jpeg_calc_output_dimensions (j_decompress_ptr cinfo)
  * enough and used often enough to justify this.
  */
 
-LOCAL void
+LOCAL(void)
 prepare_range_limit_table (j_decompress_ptr cinfo)
 /* Allocate and fill in the sample_range_limit table */
 {
@@ -284,7 +284,7 @@ prepare_range_limit_table (j_decompress_ptr cinfo)
  * settings.
  */
 
-LOCAL void
+LOCAL(void)
 master_selection (j_decompress_ptr cinfo)
 {
   my_master_ptr master = (my_master_ptr) cinfo->master;
@@ -431,10 +431,10 @@ master_selection (j_decompress_ptr cinfo)
  * modules will be active during this pass and give them appropriate
  * start_pass calls.  We also set is_dummy_pass to indicate whether this
  * is a "real" output pass or a dummy pass for color quantization.
- * (In the latter case, jdapi.c will crank the pass to completion.)
+ * (In the latter case, jdapistd.c will crank the pass to completion.)
  */
 
-METHODDEF void
+METHODDEF(void)
 prepare_for_output_pass (j_decompress_ptr cinfo)
 {
   my_master_ptr master = (my_master_ptr) cinfo->master;
@@ -494,7 +494,7 @@ prepare_for_output_pass (j_decompress_ptr cinfo)
  * Finish up at end of an output pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 finish_output_pass (j_decompress_ptr cinfo)
 {
   my_master_ptr master = (my_master_ptr) cinfo->master;
@@ -511,7 +511,7 @@ finish_output_pass (j_decompress_ptr cinfo)
  * Switch to a new external colormap between output passes.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_new_colormap (j_decompress_ptr cinfo)
 {
   my_master_ptr master = (my_master_ptr) cinfo->master;
@@ -539,7 +539,7 @@ jpeg_new_colormap (j_decompress_ptr cinfo)
  * This is performed at the start of jpeg_start_decompress.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_master_decompress (j_decompress_ptr cinfo)
 {
   my_master_ptr master;
diff --git a/code/jpeg-6/jdmerge.c b/code/jpeg-6b/jdmerge.c
index 95585fb..3744446 100644
--- a/code/jpeg-6/jdmerge.c
+++ b/code/jpeg-6b/jdmerge.c
@@ -1,7 +1,7 @@
 /*
  * jdmerge.c
  *
- * Copyright (C) 1994-1995, Thomas G. Lane.
+ * Copyright (C) 1994-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -79,7 +79,7 @@ typedef my_upsampler * my_upsample_ptr;
  * This is taken directly from jdcolor.c; see that file for more info.
  */
 
-LOCAL void
+LOCAL(void)
 build_ycc_rgb_table (j_decompress_ptr cinfo)
 {
   my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
@@ -122,7 +122,7 @@ build_ycc_rgb_table (j_decompress_ptr cinfo)
  * Initialize for an upsampling pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_merged_upsample (j_decompress_ptr cinfo)
 {
   my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
@@ -140,7 +140,7 @@ start_pass_merged_upsample (j_decompress_ptr cinfo)
  * The control routine just handles the row buffering considerations.
  */
 
-METHODDEF void
+METHODDEF(void)
 merged_2v_upsample (j_decompress_ptr cinfo,
 		    JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
 		    JDIMENSION in_row_groups_avail,
@@ -189,7 +189,7 @@ merged_2v_upsample (j_decompress_ptr cinfo,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 merged_1v_upsample (j_decompress_ptr cinfo,
 		    JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
 		    JDIMENSION in_row_groups_avail,
@@ -222,7 +222,7 @@ merged_1v_upsample (j_decompress_ptr cinfo,
  * Upsample and color convert for the case of 2:1 horizontal and 1:1 vertical.
  */
 
-METHODDEF void
+METHODDEF(void)
 h2v1_merged_upsample (j_decompress_ptr cinfo,
 		      JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
 		      JSAMPARRAY output_buf)
@@ -284,7 +284,7 @@ h2v1_merged_upsample (j_decompress_ptr cinfo,
  * Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical.
  */
 
-METHODDEF void
+METHODDEF(void)
 h2v2_merged_upsample (j_decompress_ptr cinfo,
 		      JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
 		      JSAMPARRAY output_buf)
@@ -366,7 +366,7 @@ h2v2_merged_upsample (j_decompress_ptr cinfo,
  * of this module; no safety checks are made here.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_merged_upsampler (j_decompress_ptr cinfo)
 {
   my_upsample_ptr upsample;
diff --git a/code/jpeg-6/jdphuff.c b/code/jpeg-6b/jdphuff.c
index 025bfd8..2267809 100644
--- a/code/jpeg-6/jdphuff.c
+++ b/code/jpeg-6b/jdphuff.c
@@ -1,7 +1,7 @@
 /*
  * jdphuff.c
  *
- * Copyright (C) 1995, Thomas G. Lane.
+ * Copyright (C) 1995-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -74,21 +74,21 @@ typedef struct {
 typedef phuff_entropy_decoder * phuff_entropy_ptr;
 
 /* Forward declarations */
-METHODDEF boolean decode_mcu_DC_first JPP((j_decompress_ptr cinfo,
-					   JBLOCKROW *MCU_data));
-METHODDEF boolean decode_mcu_AC_first JPP((j_decompress_ptr cinfo,
-					   JBLOCKROW *MCU_data));
-METHODDEF boolean decode_mcu_DC_refine JPP((j_decompress_ptr cinfo,
+METHODDEF(boolean) decode_mcu_DC_first JPP((j_decompress_ptr cinfo,
 					    JBLOCKROW *MCU_data));
-METHODDEF boolean decode_mcu_AC_refine JPP((j_decompress_ptr cinfo,
+METHODDEF(boolean) decode_mcu_AC_first JPP((j_decompress_ptr cinfo,
 					    JBLOCKROW *MCU_data));
+METHODDEF(boolean) decode_mcu_DC_refine JPP((j_decompress_ptr cinfo,
+					     JBLOCKROW *MCU_data));
+METHODDEF(boolean) decode_mcu_AC_refine JPP((j_decompress_ptr cinfo,
+					     JBLOCKROW *MCU_data));
 
 
 /*
  * Initialize for a Huffman-compressed scan.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_phuff_decoder (j_decompress_ptr cinfo)
 {
   phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
@@ -119,6 +119,12 @@ start_pass_phuff_decoder (j_decompress_ptr cinfo)
   }
   if (cinfo->Al > 13)		/* need not check for < 0 */
     bad = TRUE;
+  /* Arguably the maximum Al value should be less than 13 for 8-bit precision,
+   * but the spec doesn't say so, and we try to be liberal about what we
+   * accept.  Note: large Al values could result in out-of-range DC
+   * coefficients during early scans, leading to bizarre displays due to
+   * overflows in the IDCT math.  But we won't crash.
+   */
   if (bad)
     ERREXIT4(cinfo, JERR_BAD_PROGRESSION,
 	     cinfo->Ss, cinfo->Se, cinfo->Ah, cinfo->Al);
@@ -160,18 +166,12 @@ start_pass_phuff_decoder (j_decompress_ptr cinfo)
     if (is_DC_band) {
       if (cinfo->Ah == 0) {	/* DC refinement needs no table */
 	tbl = compptr->dc_tbl_no;
-	if (tbl < 0 || tbl >= NUM_HUFF_TBLS ||
-	    cinfo->dc_huff_tbl_ptrs[tbl] == NULL)
-	  ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tbl);
-	jpeg_make_d_derived_tbl(cinfo, cinfo->dc_huff_tbl_ptrs[tbl],
+	jpeg_make_d_derived_tbl(cinfo, TRUE, tbl,
 				& entropy->derived_tbls[tbl]);
       }
     } else {
       tbl = compptr->ac_tbl_no;
-      if (tbl < 0 || tbl >= NUM_HUFF_TBLS ||
-          cinfo->ac_huff_tbl_ptrs[tbl] == NULL)
-        ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tbl);
-      jpeg_make_d_derived_tbl(cinfo, cinfo->ac_huff_tbl_ptrs[tbl],
+      jpeg_make_d_derived_tbl(cinfo, FALSE, tbl,
 			      & entropy->derived_tbls[tbl]);
       /* remember the single active table */
       entropy->ac_derived_tbl = entropy->derived_tbls[tbl];
@@ -183,7 +183,7 @@ start_pass_phuff_decoder (j_decompress_ptr cinfo)
   /* Initialize bitread state variables */
   entropy->bitstate.bits_left = 0;
   entropy->bitstate.get_buffer = 0; /* unnecessary, but keeps Purify quiet */
-  entropy->bitstate.printed_eod = FALSE;
+  entropy->pub.insufficient_data = FALSE;
 
   /* Initialize private state variables */
   entropy->saved.EOBRUN = 0;
@@ -224,7 +224,7 @@ static const int extend_offset[16] = /* entry n is (-1 << n) + 1 */
  * Returns FALSE if must suspend.
  */
 
-LOCAL boolean
+LOCAL(boolean)
 process_restart (j_decompress_ptr cinfo)
 {
   phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
@@ -248,8 +248,13 @@ process_restart (j_decompress_ptr cinfo)
   /* Reset restart counter */
   entropy->restarts_to_go = cinfo->restart_interval;
 
-  /* Next segment can get another out-of-data warning */
-  entropy->bitstate.printed_eod = FALSE;
+  /* Reset out-of-data flag, unless read_restart_marker left us smack up
+   * against a marker.  In that case we will end up treating the next data
+   * segment as empty, and we can avoid producing bogus output pixels by
+   * leaving the flag set.
+   */
+  if (cinfo->unread_marker == 0)
+    entropy->pub.insufficient_data = FALSE;
 
   return TRUE;
 }
@@ -277,7 +282,7 @@ process_restart (j_decompress_ptr cinfo)
  * or first pass of successive approximation).
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
 {   
   phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
@@ -297,39 +302,45 @@ decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
 	return FALSE;
   }
 
-  /* Load up working state */
-  BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
-  ASSIGN_STATE(state, entropy->saved);
+  /* If we've run out of data, just leave the MCU set to zeroes.
+   * This way, we return uniform gray for the remainder of the segment.
+   */
+  if (! entropy->pub.insufficient_data) {
 
-  /* Outer loop handles each block in the MCU */
+    /* Load up working state */
+    BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
+    ASSIGN_STATE(state, entropy->saved);
 
-  for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
-    block = MCU_data[blkn];
-    ci = cinfo->MCU_membership[blkn];
-    compptr = cinfo->cur_comp_info[ci];
-    tbl = entropy->derived_tbls[compptr->dc_tbl_no];
+    /* Outer loop handles each block in the MCU */
+
+    for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
+      block = MCU_data[blkn];
+      ci = cinfo->MCU_membership[blkn];
+      compptr = cinfo->cur_comp_info[ci];
+      tbl = entropy->derived_tbls[compptr->dc_tbl_no];
+
+      /* Decode a single block's worth of coefficients */
 
-    /* Decode a single block's worth of coefficients */
+      /* Section F.2.2.1: decode the DC coefficient difference */
+      HUFF_DECODE(s, br_state, tbl, return FALSE, label1);
+      if (s) {
+	CHECK_BIT_BUFFER(br_state, s, return FALSE);
+	r = GET_BITS(s);
+	s = HUFF_EXTEND(r, s);
+      }
 
-    /* Section F.2.2.1: decode the DC coefficient difference */
-    HUFF_DECODE(s, br_state, tbl, return FALSE, label1);
-    if (s) {
-      CHECK_BIT_BUFFER(br_state, s, return FALSE);
-      r = GET_BITS(s);
-      s = HUFF_EXTEND(r, s);
+      /* Convert DC difference to actual value, update last_dc_val */
+      s += state.last_dc_val[ci];
+      state.last_dc_val[ci] = s;
+      /* Scale and output the coefficient (assumes jpeg_natural_order[0]=0) */
+      (*block)[0] = (JCOEF) (s << Al);
     }
 
-    /* Convert DC difference to actual value, update last_dc_val */
-    s += state.last_dc_val[ci];
-    state.last_dc_val[ci] = s;
-    /* Scale and output the DC coefficient (assumes jpeg_natural_order[0]=0) */
-    (*block)[0] = (JCOEF) (s << Al);
+    /* Completed MCU, so update state */
+    BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
+    ASSIGN_STATE(entropy->saved, state);
   }
 
-  /* Completed MCU, so update state */
-  BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
-  ASSIGN_STATE(entropy->saved, state);
-
   /* Account for restart interval (no-op if not using restarts) */
   entropy->restarts_to_go--;
 
@@ -342,7 +353,7 @@ decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
  * or first pass of successive approximation).
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
 {   
   phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
@@ -361,53 +372,59 @@ decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
 	return FALSE;
   }
 
-  /* Load up working state.
-   * We can avoid loading/saving bitread state if in an EOB run.
+  /* If we've run out of data, just leave the MCU set to zeroes.
+   * This way, we return uniform gray for the remainder of the segment.
    */
-  EOBRUN = entropy->saved.EOBRUN; /* only part of saved state we care about */
-
-  /* There is always only one block per MCU */
-
-  if (EOBRUN > 0)		/* if it's a band of zeroes... */
-    EOBRUN--;			/* ...process it now (we do nothing) */
-  else {
-    BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
-    block = MCU_data[0];
-    tbl = entropy->ac_derived_tbl;
+  if (! entropy->pub.insufficient_data) {
 
-    for (k = cinfo->Ss; k <= Se; k++) {
-      HUFF_DECODE(s, br_state, tbl, return FALSE, label2);
-      r = s >> 4;
-      s &= 15;
-      if (s) {
-        k += r;
-        CHECK_BIT_BUFFER(br_state, s, return FALSE);
-        r = GET_BITS(s);
-        s = HUFF_EXTEND(r, s);
-	/* Scale and output coefficient in natural (dezigzagged) order */
-        (*block)[jpeg_natural_order[k]] = (JCOEF) (s << Al);
-      } else {
-        if (r == 15) {		/* ZRL */
-          k += 15;		/* skip 15 zeroes in band */
-        } else {		/* EOBr, run length is 2^r + appended bits */
-          EOBRUN = 1 << r;
-          if (r) {		/* EOBr, r > 0 */
-	    CHECK_BIT_BUFFER(br_state, r, return FALSE);
-            r = GET_BITS(r);
-            EOBRUN += r;
-          }
-	  EOBRUN--;		/* this band is processed at this moment */
-	  break;		/* force end-of-band */
+    /* Load up working state.
+     * We can avoid loading/saving bitread state if in an EOB run.
+     */
+    EOBRUN = entropy->saved.EOBRUN;	/* only part of saved state we need */
+
+    /* There is always only one block per MCU */
+
+    if (EOBRUN > 0)		/* if it's a band of zeroes... */
+      EOBRUN--;			/* ...process it now (we do nothing) */
+    else {
+      BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
+      block = MCU_data[0];
+      tbl = entropy->ac_derived_tbl;
+
+      for (k = cinfo->Ss; k <= Se; k++) {
+	HUFF_DECODE(s, br_state, tbl, return FALSE, label2);
+	r = s >> 4;
+	s &= 15;
+	if (s) {
+	  k += r;
+	  CHECK_BIT_BUFFER(br_state, s, return FALSE);
+	  r = GET_BITS(s);
+	  s = HUFF_EXTEND(r, s);
+	  /* Scale and output coefficient in natural (dezigzagged) order */
+	  (*block)[jpeg_natural_order[k]] = (JCOEF) (s << Al);
+	} else {
+	  if (r == 15) {	/* ZRL */
+	    k += 15;		/* skip 15 zeroes in band */
+	  } else {		/* EOBr, run length is 2^r + appended bits */
+	    EOBRUN = 1 << r;
+	    if (r) {		/* EOBr, r > 0 */
+	      CHECK_BIT_BUFFER(br_state, r, return FALSE);
+	      r = GET_BITS(r);
+	      EOBRUN += r;
+	    }
+	    EOBRUN--;		/* this band is processed at this moment */
+	    break;		/* force end-of-band */
+	  }
 	}
       }
+
+      BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
     }
 
-    BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
+    /* Completed MCU, so update state */
+    entropy->saved.EOBRUN = EOBRUN;	/* only part of saved state we need */
   }
 
-  /* Completed MCU, so update state */
-  entropy->saved.EOBRUN = EOBRUN; /* only part of saved state we care about */
-
   /* Account for restart interval (no-op if not using restarts) */
   entropy->restarts_to_go--;
 
@@ -421,7 +438,7 @@ decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
  * is not very clear on the point.
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
 {   
   phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
@@ -437,6 +454,10 @@ decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
 	return FALSE;
   }
 
+  /* Not worth the cycles to check insufficient_data here,
+   * since we will not change the data anyway if we read zeroes.
+   */
+
   /* Load up working state */
   BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
 
@@ -466,7 +487,7 @@ decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
  * MCU decoding for AC successive approximation refinement scan.
  */
 
-METHODDEF boolean
+METHODDEF(boolean)
 decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
 {   
   phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
@@ -489,55 +510,93 @@ decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
 	return FALSE;
   }
 
-  /* Load up working state */
-  BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
-  EOBRUN = entropy->saved.EOBRUN; /* only part of saved state we care about */
-
-  /* There is always only one block per MCU */
-  block = MCU_data[0];
-  tbl = entropy->ac_derived_tbl;
-
-  /* If we are forced to suspend, we must undo the assignments to any newly
-   * nonzero coefficients in the block, because otherwise we'd get confused
-   * next time about which coefficients were already nonzero.
-   * But we need not undo addition of bits to already-nonzero coefficients;
-   * instead, we can test the current bit position to see if we already did it.
+  /* If we've run out of data, don't modify the MCU.
    */
-  num_newnz = 0;
+  if (! entropy->pub.insufficient_data) {
 
-  /* initialize coefficient loop counter to start of band */
-  k = cinfo->Ss;
+    /* Load up working state */
+    BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
+    EOBRUN = entropy->saved.EOBRUN; /* only part of saved state we need */
 
-  if (EOBRUN == 0) {
-    for (; k <= Se; k++) {
-      HUFF_DECODE(s, br_state, tbl, goto undoit, label3);
-      r = s >> 4;
-      s &= 15;
-      if (s) {
-	if (s != 1)		/* size of new coef should always be 1 */
-	  WARNMS(cinfo, JWRN_HUFF_BAD_CODE);
-        CHECK_BIT_BUFFER(br_state, 1, goto undoit);
-        if (GET_BITS(1))
-	  s = p1;		/* newly nonzero coef is positive */
-	else
-	  s = m1;		/* newly nonzero coef is negative */
-      } else {
-	if (r != 15) {
-	  EOBRUN = 1 << r;	/* EOBr, run length is 2^r + appended bits */
-	  if (r) {
-	    CHECK_BIT_BUFFER(br_state, r, goto undoit);
-	    r = GET_BITS(r);
-	    EOBRUN += r;
+    /* There is always only one block per MCU */
+    block = MCU_data[0];
+    tbl = entropy->ac_derived_tbl;
+
+    /* If we are forced to suspend, we must undo the assignments to any newly
+     * nonzero coefficients in the block, because otherwise we'd get confused
+     * next time about which coefficients were already nonzero.
+     * But we need not undo addition of bits to already-nonzero coefficients;
+     * instead, we can test the current bit to see if we already did it.
+     */
+    num_newnz = 0;
+
+    /* initialize coefficient loop counter to start of band */
+    k = cinfo->Ss;
+
+    if (EOBRUN == 0) {
+      for (; k <= Se; k++) {
+	HUFF_DECODE(s, br_state, tbl, goto undoit, label3);
+	r = s >> 4;
+	s &= 15;
+	if (s) {
+	  if (s != 1)		/* size of new coef should always be 1 */
+	    WARNMS(cinfo, JWRN_HUFF_BAD_CODE);
+	  CHECK_BIT_BUFFER(br_state, 1, goto undoit);
+	  if (GET_BITS(1))
+	    s = p1;		/* newly nonzero coef is positive */
+	  else
+	    s = m1;		/* newly nonzero coef is negative */
+	} else {
+	  if (r != 15) {
+	    EOBRUN = 1 << r;	/* EOBr, run length is 2^r + appended bits */
+	    if (r) {
+	      CHECK_BIT_BUFFER(br_state, r, goto undoit);
+	      r = GET_BITS(r);
+	      EOBRUN += r;
+	    }
+	    break;		/* rest of block is handled by EOB logic */
+	  }
+	  /* note s = 0 for processing ZRL */
+	}
+	/* Advance over already-nonzero coefs and r still-zero coefs,
+	 * appending correction bits to the nonzeroes.  A correction bit is 1
+	 * if the absolute value of the coefficient must be increased.
+	 */
+	do {
+	  thiscoef = *block + jpeg_natural_order[k];
+	  if (*thiscoef != 0) {
+	    CHECK_BIT_BUFFER(br_state, 1, goto undoit);
+	    if (GET_BITS(1)) {
+	      if ((*thiscoef & p1) == 0) { /* do nothing if already set it */
+		if (*thiscoef >= 0)
+		  *thiscoef += p1;
+		else
+		  *thiscoef += m1;
+	      }
+	    }
+	  } else {
+	    if (--r < 0)
+	      break;		/* reached target zero coefficient */
 	  }
-	  break;		/* rest of block is handled by EOB logic */
+	  k++;
+	} while (k <= Se);
+	if (s) {
+	  int pos = jpeg_natural_order[k];
+	  /* Output newly nonzero coefficient */
+	  (*block)[pos] = (JCOEF) s;
+	  /* Remember its position in case we have to suspend */
+	  newnz_pos[num_newnz++] = pos;
 	}
-	/* note s = 0 for processing ZRL */
       }
-      /* Advance over already-nonzero coefs and r still-zero coefs,
-       * appending correction bits to the nonzeroes.  A correction bit is 1
+    }
+
+    if (EOBRUN > 0) {
+      /* Scan any remaining coefficient positions after the end-of-band
+       * (the last newly nonzero coefficient, if any).  Append a correction
+       * bit to each already-nonzero coefficient.  A correction bit is 1
        * if the absolute value of the coefficient must be increased.
        */
-      do {
+      for (; k <= Se; k++) {
 	thiscoef = *block + jpeg_natural_order[k];
 	if (*thiscoef != 0) {
 	  CHECK_BIT_BUFFER(br_state, 1, goto undoit);
@@ -549,50 +608,17 @@ decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
 		*thiscoef += m1;
 	    }
 	  }
-	} else {
-	  if (--r < 0)
-	    break;		/* reached target zero coefficient */
 	}
-	k++;
-      } while (k <= Se);
-      if (s) {
-	int pos = jpeg_natural_order[k];
-	/* Output newly nonzero coefficient */
-	(*block)[pos] = (JCOEF) s;
-	/* Remember its position in case we have to suspend */
-	newnz_pos[num_newnz++] = pos;
       }
+      /* Count one block completed in EOB run */
+      EOBRUN--;
     }
-  }
 
-  if (EOBRUN > 0) {
-    /* Scan any remaining coefficient positions after the end-of-band
-     * (the last newly nonzero coefficient, if any).  Append a correction
-     * bit to each already-nonzero coefficient.  A correction bit is 1
-     * if the absolute value of the coefficient must be increased.
-     */
-    for (; k <= Se; k++) {
-      thiscoef = *block + jpeg_natural_order[k];
-      if (*thiscoef != 0) {
-	CHECK_BIT_BUFFER(br_state, 1, goto undoit);
-	if (GET_BITS(1)) {
-	  if ((*thiscoef & p1) == 0) { /* do nothing if already changed it */
-	    if (*thiscoef >= 0)
-	      *thiscoef += p1;
-	    else
-	      *thiscoef += m1;
-	  }
-	}
-      }
-    }
-    /* Count one block completed in EOB run */
-    EOBRUN--;
+    /* Completed MCU, so update state */
+    BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
+    entropy->saved.EOBRUN = EOBRUN; /* only part of saved state we need */
   }
 
-  /* Completed MCU, so update state */
-  BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
-  entropy->saved.EOBRUN = EOBRUN; /* only part of saved state we care about */
-
   /* Account for restart interval (no-op if not using restarts) */
   entropy->restarts_to_go--;
 
@@ -611,7 +637,7 @@ undoit:
  * Module initialization routine for progressive Huffman entropy decoding.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_phuff_decoder (j_decompress_ptr cinfo)
 {
   phuff_entropy_ptr entropy;
diff --git a/code/jpeg-6/jdpostct.c b/code/jpeg-6b/jdpostct.c
index f612002..571563d 100644
--- a/code/jpeg-6/jdpostct.c
+++ b/code/jpeg-6b/jdpostct.c
@@ -1,7 +1,7 @@
 /*
  * jdpostct.c
  *
- * Copyright (C) 1994-1995, Thomas G. Lane.
+ * Copyright (C) 1994-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -43,20 +43,20 @@ typedef my_post_controller * my_post_ptr;
 
 
 /* Forward declarations */
-METHODDEF void post_process_1pass
+METHODDEF(void) post_process_1pass
 	JPP((j_decompress_ptr cinfo,
 	     JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
 	     JDIMENSION in_row_groups_avail,
 	     JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
 	     JDIMENSION out_rows_avail));
 #ifdef QUANT_2PASS_SUPPORTED
-METHODDEF void post_process_prepass
+METHODDEF(void) post_process_prepass
 	JPP((j_decompress_ptr cinfo,
 	     JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
 	     JDIMENSION in_row_groups_avail,
 	     JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
 	     JDIMENSION out_rows_avail));
-METHODDEF void post_process_2pass
+METHODDEF(void) post_process_2pass
 	JPP((j_decompress_ptr cinfo,
 	     JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
 	     JDIMENSION in_row_groups_avail,
@@ -69,7 +69,7 @@ METHODDEF void post_process_2pass
  * Initialize for a processing pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_dpost (j_decompress_ptr cinfo, J_BUF_MODE pass_mode)
 {
   my_post_ptr post = (my_post_ptr) cinfo->post;
@@ -122,7 +122,7 @@ start_pass_dpost (j_decompress_ptr cinfo, J_BUF_MODE pass_mode)
  * This is used for color precision reduction as well as one-pass quantization.
  */
 
-METHODDEF void
+METHODDEF(void)
 post_process_1pass (j_decompress_ptr cinfo,
 		    JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
 		    JDIMENSION in_row_groups_avail,
@@ -154,7 +154,7 @@ post_process_1pass (j_decompress_ptr cinfo,
  * Process some data in the first pass of 2-pass quantization.
  */
 
-METHODDEF void
+METHODDEF(void)
 post_process_prepass (j_decompress_ptr cinfo,
 		      JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
 		      JDIMENSION in_row_groups_avail,
@@ -198,7 +198,7 @@ post_process_prepass (j_decompress_ptr cinfo,
  * Process some data in the second pass of 2-pass quantization.
  */
 
-METHODDEF void
+METHODDEF(void)
 post_process_2pass (j_decompress_ptr cinfo,
 		    JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
 		    JDIMENSION in_row_groups_avail,
@@ -246,7 +246,7 @@ post_process_2pass (j_decompress_ptr cinfo,
  * Initialize postprocessing controller.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_d_post_controller (j_decompress_ptr cinfo, boolean need_full_buffer)
 {
   my_post_ptr post;
diff --git a/code/jpeg-6/jdsample.c b/code/jpeg-6b/jdsample.c
index 661e198..80ffefb 100644
--- a/code/jpeg-6/jdsample.c
+++ b/code/jpeg-6b/jdsample.c
@@ -1,7 +1,7 @@
 /*
  * jdsample.c
  *
- * Copyright (C) 1991-1994, Thomas G. Lane.
+ * Copyright (C) 1991-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -65,7 +65,7 @@ typedef my_upsampler * my_upsample_ptr;
  * Initialize for an upsampling pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_upsample (j_decompress_ptr cinfo)
 {
   my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
@@ -85,7 +85,7 @@ start_pass_upsample (j_decompress_ptr cinfo)
  * color conversion a row at a time.
  */
 
-METHODDEF void
+METHODDEF(void)
 sep_upsample (j_decompress_ptr cinfo,
 	      JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
 	      JDIMENSION in_row_groups_avail,
@@ -153,7 +153,7 @@ sep_upsample (j_decompress_ptr cinfo,
  * "consumed" until we are done color converting and emitting it.
  */
 
-METHODDEF void
+METHODDEF(void)
 fullsize_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
 		   JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
 {
@@ -166,7 +166,7 @@ fullsize_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
  * These components will not be referenced by color conversion.
  */
 
-METHODDEF void
+METHODDEF(void)
 noop_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
 	       JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
 {
@@ -185,7 +185,7 @@ noop_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
  * you would be well advised to improve this code.
  */
 
-METHODDEF void
+METHODDEF(void)
 int_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
 	      JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
 {
@@ -229,7 +229,7 @@ int_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
  * It's still a box filter.
  */
 
-METHODDEF void
+METHODDEF(void)
 h2v1_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
 	       JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
 {
@@ -257,7 +257,7 @@ h2v1_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
  * It's still a box filter.
  */
 
-METHODDEF void
+METHODDEF(void)
 h2v2_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
 	       JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
 {
@@ -300,7 +300,7 @@ h2v2_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
  * alternate pixel locations (a simple ordered dither pattern).
  */
 
-METHODDEF void
+METHODDEF(void)
 h2v1_fancy_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
 		     JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
 {
@@ -341,7 +341,7 @@ h2v1_fancy_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
  * context from the main buffer controller (see initialization code).
  */
 
-METHODDEF void
+METHODDEF(void)
 h2v2_fancy_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
 		     JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
 {
@@ -395,7 +395,7 @@ h2v2_fancy_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
  * Module initialization routine for upsampling.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_upsampler (j_decompress_ptr cinfo)
 {
   my_upsample_ptr upsample;
diff --git a/code/jpeg-6/jdtrans.c b/code/jpeg-6b/jdtrans.c
index 5c14adc..6c0ab71 100644
--- a/code/jpeg-6/jdtrans.c
+++ b/code/jpeg-6b/jdtrans.c
@@ -1,7 +1,7 @@
 /*
  * jdtrans.c
  *
- * Copyright (C) 1995, Thomas G. Lane.
+ * Copyright (C) 1995-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -16,7 +16,7 @@
 
 
 /* Forward declarations */
-LOCAL void transdecode_master_selection JPP((j_decompress_ptr cinfo));
+LOCAL(void) transdecode_master_selection JPP((j_decompress_ptr cinfo));
 
 
 /*
@@ -30,43 +30,61 @@ LOCAL void transdecode_master_selection JPP((j_decompress_ptr cinfo));
  * To release the memory occupied by the virtual arrays, call
  * jpeg_finish_decompress() when done with the data.
  *
+ * An alternative usage is to simply obtain access to the coefficient arrays
+ * during a buffered-image-mode decompression operation.  This is allowed
+ * after any jpeg_finish_output() call.  The arrays can be accessed until
+ * jpeg_finish_decompress() is called.  (Note that any call to the library
+ * may reposition the arrays, so don't rely on access_virt_barray() results
+ * to stay valid across library calls.)
+ *
  * Returns NULL if suspended.  This case need be checked only if
  * a suspending data source is used.
  */
 
-GLOBAL jvirt_barray_ptr *
+GLOBAL(jvirt_barray_ptr *)
 jpeg_read_coefficients (j_decompress_ptr cinfo)
 {
   if (cinfo->global_state == DSTATE_READY) {
     /* First call: initialize active modules */
     transdecode_master_selection(cinfo);
     cinfo->global_state = DSTATE_RDCOEFS;
-  } else if (cinfo->global_state != DSTATE_RDCOEFS)
-    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
-  /* Absorb whole file into the coef buffer */
-  for (;;) {
-    int retcode;
-    /* Call progress monitor hook if present */
-    if (cinfo->progress != NULL)
-      (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
-    /* Absorb some more input */
-    retcode = (*cinfo->inputctl->consume_input) (cinfo);
-    if (retcode == JPEG_SUSPENDED)
-      return NULL;
-    if (retcode == JPEG_REACHED_EOI)
-      break;
-    /* Advance progress counter if appropriate */
-    if (cinfo->progress != NULL &&
-	(retcode == JPEG_ROW_COMPLETED || retcode == JPEG_REACHED_SOS)) {
-      if (++cinfo->progress->pass_counter >= cinfo->progress->pass_limit) {
-	/* startup underestimated number of scans; ratchet up one scan */
-	cinfo->progress->pass_limit += (long) cinfo->total_iMCU_rows;
+  }
+  if (cinfo->global_state == DSTATE_RDCOEFS) {
+    /* Absorb whole file into the coef buffer */
+    for (;;) {
+      int retcode;
+      /* Call progress monitor hook if present */
+      if (cinfo->progress != NULL)
+	(*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
+      /* Absorb some more input */
+      retcode = (*cinfo->inputctl->consume_input) (cinfo);
+      if (retcode == JPEG_SUSPENDED)
+	return NULL;
+      if (retcode == JPEG_REACHED_EOI)
+	break;
+      /* Advance progress counter if appropriate */
+      if (cinfo->progress != NULL &&
+	  (retcode == JPEG_ROW_COMPLETED || retcode == JPEG_REACHED_SOS)) {
+	if (++cinfo->progress->pass_counter >= cinfo->progress->pass_limit) {
+	  /* startup underestimated number of scans; ratchet up one scan */
+	  cinfo->progress->pass_limit += (long) cinfo->total_iMCU_rows;
+	}
       }
     }
+    /* Set state so that jpeg_finish_decompress does the right thing */
+    cinfo->global_state = DSTATE_STOPPING;
   }
-  /* Set state so that jpeg_finish_decompress does the right thing */
-  cinfo->global_state = DSTATE_STOPPING;
-  return cinfo->coef->coef_arrays;
+  /* At this point we should be in state DSTATE_STOPPING if being used
+   * standalone, or in state DSTATE_BUFIMAGE if being invoked to get access
+   * to the coefficients during a full buffered-image-mode decompression.
+   */
+  if ((cinfo->global_state == DSTATE_STOPPING ||
+       cinfo->global_state == DSTATE_BUFIMAGE) && cinfo->buffered_image) {
+    return cinfo->coef->coef_arrays;
+  }
+  /* Oops, improper usage */
+  ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  return NULL;			/* keep compiler happy */
 }
 
 
@@ -75,9 +93,12 @@ jpeg_read_coefficients (j_decompress_ptr cinfo)
  * This substitutes for jdmaster.c's initialization of the full decompressor.
  */
 
-LOCAL void
+LOCAL(void)
 transdecode_master_selection (j_decompress_ptr cinfo)
 {
+  /* This is effectively a buffered-image operation. */
+  cinfo->buffered_image = TRUE;
+
   /* Entropy decoding: either Huffman or arithmetic coding. */
   if (cinfo->arith_code) {
     ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
diff --git a/code/jpeg-6/jerror.c b/code/jpeg-6b/jerror.c
index 026e2d1..9df35d6 100644
--- a/code/jpeg-6/jerror.c
+++ b/code/jpeg-6b/jerror.c
@@ -1,7 +1,7 @@
 /*
  * jerror.c
  *
- * Copyright (C) 1991-1994, Thomas G. Lane.
+ * Copyright (C) 1991-1998, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -10,6 +10,11 @@
  * stderr is the right thing to do.  Many applications will want to replace
  * some or all of these routines.
  *
+ * If you define USE_WINDOWS_MESSAGEBOX in jconfig.h or in the makefile,
+ * you get a Windows-specific hack to display error messages in a dialog box.
+ * It ain't much, but it beats dropping error messages into the bit bucket,
+ * which is what happens to output to stderr under most Windows C compilers.
+ *
  * These routines are used by both the compression and decompression code.
  */
 
@@ -21,6 +26,10 @@
 #include "jversion.h"
 #include "jerror.h"
 
+#ifdef USE_WINDOWS_MESSAGEBOX
+#include <windows.h>
+#endif
+
 #ifndef EXIT_FAILURE		/* define exit() codes if not provided */
 #define EXIT_FAILURE  1
 #endif
@@ -59,7 +68,7 @@ const char * const jpeg_std_message_table[] = {
  * or jpeg_destroy) at some point.
  */
 
-METHODDEF void
+METHODDEF(void)
 error_exit (j_common_ptr cinfo)
 {
   char buffer[JMSG_LENGTH_MAX];
@@ -78,9 +87,18 @@ error_exit (j_common_ptr cinfo)
  * Actual output of an error or trace message.
  * Applications may override this method to send JPEG messages somewhere
  * other than stderr.
+ *
+ * On Windows, printing to stderr is generally completely useless,
+ * so we provide optional code to produce an error-dialog popup.
+ * Most Windows applications will still prefer to override this routine,
+ * but if they don't, it'll do something at least marginally useful.
+ *
+ * NOTE: to use the library in an environment that doesn't support the
+ * C stdio library, you may have to delete the call to fprintf() entirely,
+ * not just not use this routine.
  */
 
-METHODDEF void
+METHODDEF(void)
 output_message (j_common_ptr cinfo)
 {
   char buffer[JMSG_LENGTH_MAX];
@@ -88,8 +106,14 @@ output_message (j_common_ptr cinfo)
   /* Create the message */
   (*cinfo->err->format_message) (cinfo, buffer);
 
+#ifdef USE_WINDOWS_MESSAGEBOX
+  /* Display it in a message dialog box */
+  MessageBox(GetActiveWindow(), buffer, "JPEG Library Error",
+	     MB_OK | MB_ICONERROR);
+#else
   /* Send it to stderr, adding a newline */
   ri.Printf(PRINT_ALL, "%s\n", buffer);
+#endif
 }
 
 
@@ -104,7 +128,7 @@ output_message (j_common_ptr cinfo)
  * or change the policy about which messages to display.
  */
 
-METHODDEF void
+METHODDEF(void)
 emit_message (j_common_ptr cinfo, int msg_level)
 {
   struct jpeg_error_mgr * err = cinfo->err;
@@ -133,7 +157,7 @@ emit_message (j_common_ptr cinfo, int msg_level)
  * Few applications should need to override this method.
  */
 
-METHODDEF void
+METHODDEF(void)
 format_message (j_common_ptr cinfo, char * buffer)
 {
   struct jpeg_error_mgr * err = cinfo->err;
@@ -188,7 +212,7 @@ format_message (j_common_ptr cinfo, char * buffer)
  * this method if it has additional error processing state.
  */
 
-METHODDEF void
+METHODDEF(void)
 reset_error_mgr (j_common_ptr cinfo)
 {
   cinfo->err->num_warnings = 0;
@@ -207,7 +231,7 @@ reset_error_mgr (j_common_ptr cinfo)
  * after which the application may override some of the methods.
  */
 
-GLOBAL struct jpeg_error_mgr *
+GLOBAL(struct jpeg_error_mgr *)
 jpeg_std_error (struct jpeg_error_mgr * err)
 {
   err->error_exit = error_exit;
diff --git a/code/jpeg-6/jerror.h b/code/jpeg-6b/jerror.h
index bf60e7e..fc2fffe 100644
--- a/code/jpeg-6/jerror.h
+++ b/code/jpeg-6b/jerror.h
@@ -1,7 +1,7 @@
 /*
  * jerror.h
  *
- * Copyright (C) 1994-1995, Thomas G. Lane.
+ * Copyright (C) 1994-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -45,10 +45,14 @@ JMESSAGE(JERR_BAD_ALIGN_TYPE, "ALIGN_TYPE is wrong, please fix")
 JMESSAGE(JERR_BAD_ALLOC_CHUNK, "MAX_ALLOC_CHUNK is wrong, please fix")
 JMESSAGE(JERR_BAD_BUFFER_MODE, "Bogus buffer control mode")
 JMESSAGE(JERR_BAD_COMPONENT_ID, "Invalid component ID %d in SOS")
+JMESSAGE(JERR_BAD_DCT_COEF, "DCT coefficient out of range")
 JMESSAGE(JERR_BAD_DCTSIZE, "IDCT output block size %d not supported")
+JMESSAGE(JERR_BAD_HUFF_TABLE, "Bogus Huffman table definition")
 JMESSAGE(JERR_BAD_IN_COLORSPACE, "Bogus input colorspace")
 JMESSAGE(JERR_BAD_J_COLORSPACE, "Bogus JPEG colorspace")
 JMESSAGE(JERR_BAD_LENGTH, "Bogus marker length")
+JMESSAGE(JERR_BAD_LIB_VERSION,
+	 "Wrong JPEG library version: library is %d, caller expects %d")
 JMESSAGE(JERR_BAD_MCU_SIZE, "Sampling factors too large for interleaved scan")
 JMESSAGE(JERR_BAD_POOL_ID, "Invalid memory pool code %d")
 JMESSAGE(JERR_BAD_PRECISION, "Unsupported JPEG data precision %d")
@@ -59,6 +63,8 @@ JMESSAGE(JERR_BAD_PROG_SCRIPT,
 JMESSAGE(JERR_BAD_SAMPLING, "Bogus sampling factors")
 JMESSAGE(JERR_BAD_SCAN_SCRIPT, "Invalid scan script at entry %d")
 JMESSAGE(JERR_BAD_STATE, "Improper call to JPEG library in state %d")
+JMESSAGE(JERR_BAD_STRUCT_SIZE,
+	 "JPEG parameter struct mismatch: library thinks size is %u, caller expects %u")
 JMESSAGE(JERR_BAD_VIRTUAL_ACCESS, "Bogus virtual array access")
 JMESSAGE(JERR_BUFFER_SIZE, "Buffer passed to JPEG library is too small")
 JMESSAGE(JERR_CANT_SUSPEND, "Suspension not allowed here")
@@ -67,7 +73,6 @@ JMESSAGE(JERR_COMPONENT_COUNT, "Too many color components: %d, max %d")
 JMESSAGE(JERR_CONVERSION_NOTIMPL, "Unsupported color conversion request")
 JMESSAGE(JERR_DAC_INDEX, "Bogus DAC index %d")
 JMESSAGE(JERR_DAC_VALUE, "Bogus DAC value 0x%x")
-JMESSAGE(JERR_DHT_COUNTS, "Bogus DHT counts")
 JMESSAGE(JERR_DHT_INDEX, "Bogus DHT index %d")
 JMESSAGE(JERR_DQT_INDEX, "Bogus DQT index %d")
 JMESSAGE(JERR_EMPTY_IMAGE, "Empty JPEG image (DNL not supported)")
@@ -130,12 +135,13 @@ JMESSAGE(JTRC_EMS_CLOSE, "Freed EMS handle %u")
 JMESSAGE(JTRC_EMS_OPEN, "Obtained EMS handle %u")
 JMESSAGE(JTRC_EOI, "End Of Image")
 JMESSAGE(JTRC_HUFFBITS, "        %3d %3d %3d %3d %3d %3d %3d %3d")
-JMESSAGE(JTRC_JFIF, "JFIF APP0 marker, density %dx%d  %d")
+JMESSAGE(JTRC_JFIF, "JFIF APP0 marker: version %d.%02d, density %dx%d  %d")
 JMESSAGE(JTRC_JFIF_BADTHUMBNAILSIZE,
 	 "Warning: thumbnail image size does not match data length %u")
-JMESSAGE(JTRC_JFIF_MINOR, "Unknown JFIF minor revision number %d.%02d")
+JMESSAGE(JTRC_JFIF_EXTENSION,
+	 "JFIF extension marker: type 0x%02x, length %u")
 JMESSAGE(JTRC_JFIF_THUMBNAIL, "    with %d x %d thumbnail image")
-JMESSAGE(JTRC_MISC_MARKER, "Skipping marker 0x%02x, length %u")
+JMESSAGE(JTRC_MISC_MARKER, "Miscellaneous marker 0x%02x, length %u")
 JMESSAGE(JTRC_PARMLESS_MARKER, "Unexpected marker 0x%02x")
 JMESSAGE(JTRC_QUANTVALS, "        %4u %4u %4u %4u %4u %4u %4u %4u")
 JMESSAGE(JTRC_QUANT_3_NCOLORS, "Quantizing to %d = %d*%d*%d colors")
@@ -153,6 +159,12 @@ JMESSAGE(JTRC_SOS_COMPONENT, "    Component %d: dc=%d ac=%d")
 JMESSAGE(JTRC_SOS_PARAMS, "  Ss=%d, Se=%d, Ah=%d, Al=%d")
 JMESSAGE(JTRC_TFILE_CLOSE, "Closed temporary file %s")
 JMESSAGE(JTRC_TFILE_OPEN, "Opened temporary file %s")
+JMESSAGE(JTRC_THUMB_JPEG,
+	 "JFIF extension marker: JPEG-compressed thumbnail image, length %u")
+JMESSAGE(JTRC_THUMB_PALETTE,
+	 "JFIF extension marker: palette thumbnail image, length %u")
+JMESSAGE(JTRC_THUMB_RGB,
+	 "JFIF extension marker: RGB thumbnail image, length %u")
 JMESSAGE(JTRC_UNKNOWN_IDS,
 	 "Unrecognized component IDs %d %d %d, assuming YCbCr")
 JMESSAGE(JTRC_XMS_CLOSE, "Freed XMS handle %u")
@@ -259,6 +271,12 @@ JMESSAGE(JWRN_TOO_MUCH_DATA, "Application transferred too many scanlines")
 	   _mp[0] = (p1); _mp[1] = (p2); _mp[2] = (p3); _mp[3] = (p4); \
 	   (cinfo)->err->msg_code = (code); \
 	   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)); )
+#define TRACEMS5(cinfo,lvl,code,p1,p2,p3,p4,p5)  \
+  MAKESTMT(int * _mp = (cinfo)->err->msg_parm.i; \
+	   _mp[0] = (p1); _mp[1] = (p2); _mp[2] = (p3); _mp[3] = (p4); \
+	   _mp[4] = (p5); \
+	   (cinfo)->err->msg_code = (code); \
+	   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)); )
 #define TRACEMS8(cinfo,lvl,code,p1,p2,p3,p4,p5,p6,p7,p8)  \
   MAKESTMT(int * _mp = (cinfo)->err->msg_parm.i; \
 	   _mp[0] = (p1); _mp[1] = (p2); _mp[2] = (p3); _mp[3] = (p4); \
diff --git a/code/jpeg-6/jfdctflt.c b/code/jpeg-6b/jfdctflt.c
index 21371eb..79d7a00 100644
--- a/code/jpeg-6/jfdctflt.c
+++ b/code/jpeg-6b/jfdctflt.c
@@ -1,7 +1,7 @@
 /*
  * jfdctflt.c
  *
- * Copyright (C) 1994, Thomas G. Lane.
+ * Copyright (C) 1994-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -55,7 +55,7 @@
  * Perform the forward DCT on one block of samples.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_fdct_float (FAST_FLOAT * data)
 {
   FAST_FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
diff --git a/code/jpeg-6/jfdctfst.c b/code/jpeg-6b/jfdctfst.c
index a52d7b7..ccb378a 100644
--- a/code/jpeg-6/jfdctfst.c
+++ b/code/jpeg-6b/jfdctfst.c
@@ -1,7 +1,7 @@
 /*
  * jfdctfst.c
  *
- * Copyright (C) 1994, Thomas G. Lane.
+ * Copyright (C) 1994-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -110,7 +110,7 @@
  * Perform the forward DCT on one block of samples.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_fdct_ifast (DCTELEM * data)
 {
   DCTELEM tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
diff --git a/code/jpeg-6/jfdctint.c b/code/jpeg-6b/jfdctint.c
index 7df0433..0a78b64 100644
--- a/code/jpeg-6/jfdctint.c
+++ b/code/jpeg-6b/jfdctint.c
@@ -1,7 +1,7 @@
 /*
  * jfdctint.c
  *
- * Copyright (C) 1991-1994, Thomas G. Lane.
+ * Copyright (C) 1991-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -136,7 +136,7 @@
  * Perform the forward DCT on one block of samples.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_fdct_islow (DCTELEM * data)
 {
   INT32 tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
diff --git a/code/jpeg-6/jidctflt.c b/code/jpeg-6b/jidctflt.c
index 847919e..0188ce3 100644
--- a/code/jpeg-6/jidctflt.c
+++ b/code/jpeg-6b/jidctflt.c
@@ -1,7 +1,7 @@
 /*
  * jidctflt.c
  *
- * Copyright (C) 1994, Thomas G. Lane.
+ * Copyright (C) 1994-1998, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -64,7 +64,7 @@
  * Perform dequantization and inverse DCT on one block of coefficients.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_idct_float (j_decompress_ptr cinfo, jpeg_component_info * compptr,
 		 JCOEFPTR coef_block,
 		 JSAMPARRAY output_buf, JDIMENSION output_col)
@@ -96,9 +96,10 @@ jpeg_idct_float (j_decompress_ptr cinfo, jpeg_component_info * compptr,
      * column DCT calculations can be simplified this way.
      */
     
-    if ((inptr[DCTSIZE*1] | inptr[DCTSIZE*2] | inptr[DCTSIZE*3] |
-	 inptr[DCTSIZE*4] | inptr[DCTSIZE*5] | inptr[DCTSIZE*6] |
-	 inptr[DCTSIZE*7]) == 0) {
+    if (inptr[DCTSIZE*1] == 0 && inptr[DCTSIZE*2] == 0 &&
+	inptr[DCTSIZE*3] == 0 && inptr[DCTSIZE*4] == 0 &&
+	inptr[DCTSIZE*5] == 0 && inptr[DCTSIZE*6] == 0 &&
+	inptr[DCTSIZE*7] == 0) {
       /* AC terms all zero */
       FAST_FLOAT dcval = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
       
diff --git a/code/jpeg-6/jidctfst.c b/code/jpeg-6b/jidctfst.c
index 5736817..dba4216 100644
--- a/code/jpeg-6/jidctfst.c
+++ b/code/jpeg-6b/jidctfst.c
@@ -1,7 +1,7 @@
 /*
  * jidctfst.c
  *
- * Copyright (C) 1994-1995, Thomas G. Lane.
+ * Copyright (C) 1994-1998, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -164,7 +164,7 @@
  * Perform dequantization and inverse DCT on one block of coefficients.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_idct_ifast (j_decompress_ptr cinfo, jpeg_component_info * compptr,
 		 JCOEFPTR coef_block,
 		 JSAMPARRAY output_buf, JDIMENSION output_col)
@@ -197,9 +197,10 @@ jpeg_idct_ifast (j_decompress_ptr cinfo, jpeg_component_info * compptr,
      * column DCT calculations can be simplified this way.
      */
     
-    if ((inptr[DCTSIZE*1] | inptr[DCTSIZE*2] | inptr[DCTSIZE*3] |
-	 inptr[DCTSIZE*4] | inptr[DCTSIZE*5] | inptr[DCTSIZE*6] |
-	 inptr[DCTSIZE*7]) == 0) {
+    if (inptr[DCTSIZE*1] == 0 && inptr[DCTSIZE*2] == 0 &&
+	inptr[DCTSIZE*3] == 0 && inptr[DCTSIZE*4] == 0 &&
+	inptr[DCTSIZE*5] == 0 && inptr[DCTSIZE*6] == 0 &&
+	inptr[DCTSIZE*7] == 0) {
       /* AC terms all zero */
       int dcval = (int) DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
 
@@ -289,8 +290,8 @@ jpeg_idct_ifast (j_decompress_ptr cinfo, jpeg_component_info * compptr,
      */
     
 #ifndef NO_ZERO_ROW_TEST
-    if ((wsptr[1] | wsptr[2] | wsptr[3] | wsptr[4] | wsptr[5] | wsptr[6] |
-	 wsptr[7]) == 0) {
+    if (wsptr[1] == 0 && wsptr[2] == 0 && wsptr[3] == 0 && wsptr[4] == 0 &&
+	wsptr[5] == 0 && wsptr[6] == 0 && wsptr[7] == 0) {
       /* AC terms all zero */
       JSAMPLE dcval = range_limit[IDESCALE(wsptr[0], PASS1_BITS+3)
 				  & RANGE_MASK];
diff --git a/code/jpeg-6/jidctint.c b/code/jpeg-6b/jidctint.c
index f25b08d..a72b320 100644
--- a/code/jpeg-6/jidctint.c
+++ b/code/jpeg-6b/jidctint.c
@@ -1,7 +1,7 @@
 /*
  * jidctint.c
  *
- * Copyright (C) 1991-1994, Thomas G. Lane.
+ * Copyright (C) 1991-1998, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -144,7 +144,7 @@
  * Perform dequantization and inverse DCT on one block of coefficients.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_idct_islow (j_decompress_ptr cinfo, jpeg_component_info * compptr,
 		 JCOEFPTR coef_block,
 		 JSAMPARRAY output_buf, JDIMENSION output_col)
@@ -178,9 +178,10 @@ jpeg_idct_islow (j_decompress_ptr cinfo, jpeg_component_info * compptr,
      * column DCT calculations can be simplified this way.
      */
     
-    if ((inptr[DCTSIZE*1] | inptr[DCTSIZE*2] | inptr[DCTSIZE*3] |
-	 inptr[DCTSIZE*4] | inptr[DCTSIZE*5] | inptr[DCTSIZE*6] |
-	 inptr[DCTSIZE*7]) == 0) {
+    if (inptr[DCTSIZE*1] == 0 && inptr[DCTSIZE*2] == 0 &&
+	inptr[DCTSIZE*3] == 0 && inptr[DCTSIZE*4] == 0 &&
+	inptr[DCTSIZE*5] == 0 && inptr[DCTSIZE*6] == 0 &&
+	inptr[DCTSIZE*7] == 0) {
       /* AC terms all zero */
       int dcval = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]) << PASS1_BITS;
       
@@ -284,8 +285,8 @@ jpeg_idct_islow (j_decompress_ptr cinfo, jpeg_component_info * compptr,
      */
     
 #ifndef NO_ZERO_ROW_TEST
-    if ((wsptr[1] | wsptr[2] | wsptr[3] | wsptr[4] | wsptr[5] | wsptr[6] |
-	 wsptr[7]) == 0) {
+    if (wsptr[1] == 0 && wsptr[2] == 0 && wsptr[3] == 0 && wsptr[4] == 0 &&
+	wsptr[5] == 0 && wsptr[6] == 0 && wsptr[7] == 0) {
       /* AC terms all zero */
       JSAMPLE dcval = range_limit[(int) DESCALE((INT32) wsptr[0], PASS1_BITS+3)
 				  & RANGE_MASK];
diff --git a/code/jpeg-6/jidctred.c b/code/jpeg-6b/jidctred.c
index 019c339..421f3c7 100644
--- a/code/jpeg-6/jidctred.c
+++ b/code/jpeg-6b/jidctred.c
@@ -1,7 +1,7 @@
 /*
  * jidctred.c
  *
- * Copyright (C) 1994, Thomas G. Lane.
+ * Copyright (C) 1994-1998, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -114,7 +114,7 @@
  * producing a reduced-size 4x4 output block.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_idct_4x4 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
 	       JCOEFPTR coef_block,
 	       JSAMPARRAY output_buf, JDIMENSION output_col)
@@ -139,8 +139,9 @@ jpeg_idct_4x4 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
     /* Don't bother to process column 4, because second pass won't use it */
     if (ctr == DCTSIZE-4)
       continue;
-    if ((inptr[DCTSIZE*1] | inptr[DCTSIZE*2] | inptr[DCTSIZE*3] |
-	 inptr[DCTSIZE*5] | inptr[DCTSIZE*6] | inptr[DCTSIZE*7]) == 0) {
+    if (inptr[DCTSIZE*1] == 0 && inptr[DCTSIZE*2] == 0 &&
+	inptr[DCTSIZE*3] == 0 && inptr[DCTSIZE*5] == 0 &&
+	inptr[DCTSIZE*6] == 0 && inptr[DCTSIZE*7] == 0) {
       /* AC terms all zero; we need not examine term 4 for 4x4 output */
       int dcval = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]) << PASS1_BITS;
       
@@ -198,8 +199,8 @@ jpeg_idct_4x4 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
     /* It's not clear whether a zero row test is worthwhile here ... */
 
 #ifndef NO_ZERO_ROW_TEST
-    if ((wsptr[1] | wsptr[2] | wsptr[3] | wsptr[5] | wsptr[6] |
-	 wsptr[7]) == 0) {
+    if (wsptr[1] == 0 && wsptr[2] == 0 && wsptr[3] == 0 &&
+	wsptr[5] == 0 && wsptr[6] == 0 && wsptr[7] == 0) {
       /* AC terms all zero */
       JSAMPLE dcval = range_limit[(int) DESCALE((INT32) wsptr[0], PASS1_BITS+3)
 				  & RANGE_MASK];
@@ -266,7 +267,7 @@ jpeg_idct_4x4 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
  * producing a reduced-size 2x2 output block.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_idct_2x2 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
 	       JCOEFPTR coef_block,
 	       JSAMPARRAY output_buf, JDIMENSION output_col)
@@ -290,8 +291,8 @@ jpeg_idct_2x2 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
     /* Don't bother to process columns 2,4,6 */
     if (ctr == DCTSIZE-2 || ctr == DCTSIZE-4 || ctr == DCTSIZE-6)
       continue;
-    if ((inptr[DCTSIZE*1] | inptr[DCTSIZE*3] |
-	 inptr[DCTSIZE*5] | inptr[DCTSIZE*7]) == 0) {
+    if (inptr[DCTSIZE*1] == 0 && inptr[DCTSIZE*3] == 0 &&
+	inptr[DCTSIZE*5] == 0 && inptr[DCTSIZE*7] == 0) {
       /* AC terms all zero; we need not examine terms 2,4,6 for 2x2 output */
       int dcval = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]) << PASS1_BITS;
       
@@ -331,7 +332,7 @@ jpeg_idct_2x2 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
     /* It's not clear whether a zero row test is worthwhile here ... */
 
 #ifndef NO_ZERO_ROW_TEST
-    if ((wsptr[1] | wsptr[3] | wsptr[5] | wsptr[7]) == 0) {
+    if (wsptr[1] == 0 && wsptr[3] == 0 && wsptr[5] == 0 && wsptr[7] == 0) {
       /* AC terms all zero */
       JSAMPLE dcval = range_limit[(int) DESCALE((INT32) wsptr[0], PASS1_BITS+3)
 				  & RANGE_MASK];
@@ -374,7 +375,7 @@ jpeg_idct_2x2 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
  * producing a reduced-size 1x1 output block.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_idct_1x1 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
 	       JCOEFPTR coef_block,
 	       JSAMPARRAY output_buf, JDIMENSION output_col)
diff --git a/code/jpeg-6/jinclude.h b/code/jpeg-6b/jinclude.h
index aede8ec..1c5515c 100644
--- a/code/jpeg-6/jinclude.h
+++ b/code/jpeg-6b/jinclude.h
@@ -42,7 +42,7 @@
 
 /* Include auto-config file to find out which system include files we need. */
 
-#include "../jpeg-6/jconfig.h"		/* auto configuration options */
+#include "../jpeg-6b/jconfig.h"		/* auto configuration options */
 #define JCONFIG_INCLUDED	/* so that jpeglib.h doesn't do it again */
 
 /*
diff --git a/code/jpeg-6/jload.c b/code/jpeg-6b/jload.c
index 29e750b..29e750b 100644
--- a/code/jpeg-6/jload.c
+++ b/code/jpeg-6b/jload.c
diff --git a/code/jpeg-6/jmemansi.c b/code/jpeg-6b/jmemansi.c
index 70010f9..2d93e49 100644
--- a/code/jpeg-6/jmemansi.c
+++ b/code/jpeg-6b/jmemansi.c
@@ -1,7 +1,7 @@
 /*
  * jmemansi.c
  *
- * Copyright (C) 1992-1994, Thomas G. Lane.
+ * Copyright (C) 1992-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -32,13 +32,13 @@ extern void free JPP((void *ptr));
  * routines malloc() and free().
  */
 
-GLOBAL void *
+GLOBAL(void *)
 jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
 {
   return (void *) malloc(sizeofobject);
 }
 
-GLOBAL void
+GLOBAL(void)
 jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
 {
   free(object);
@@ -52,13 +52,13 @@ jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
  * you probably won't be able to process useful-size images in only 64KB.
  */
 
-GLOBAL void FAR *
+GLOBAL(void FAR *)
 jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
 {
   return (void FAR *) malloc(sizeofobject);
 }
 
-GLOBAL void
+GLOBAL(void)
 jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
 {
   free(object);
@@ -77,7 +77,7 @@ jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
 #define DEFAULT_MAX_MEM		1000000L /* default: one megabyte */
 #endif
 
-GLOBAL long
+GLOBAL(long)
 jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
 		    long max_bytes_needed, long already_allocated)
 {
@@ -93,7 +93,7 @@ jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
  */
 
 
-METHODDEF void
+METHODDEF(void)
 read_backing_store (j_common_ptr cinfo, backing_store_ptr info,
 		    void FAR * buffer_address,
 		    long file_offset, long byte_count)
@@ -106,7 +106,7 @@ read_backing_store (j_common_ptr cinfo, backing_store_ptr info,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 write_backing_store (j_common_ptr cinfo, backing_store_ptr info,
 		     void FAR * buffer_address,
 		     long file_offset, long byte_count)
@@ -119,7 +119,7 @@ write_backing_store (j_common_ptr cinfo, backing_store_ptr info,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 close_backing_store (j_common_ptr cinfo, backing_store_ptr info)
 {
   fclose(info->temp_file);
@@ -137,7 +137,7 @@ close_backing_store (j_common_ptr cinfo, backing_store_ptr info)
  * indeed, we can't even find out the actual name of the temp file.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
 			 long total_bytes_needed)
 {
@@ -154,13 +154,13 @@ jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
  * cleanup required.
  */
 
-GLOBAL long
+GLOBAL(long)
 jpeg_mem_init (j_common_ptr cinfo)
 {
   return DEFAULT_MAX_MEM;	/* default for max_memory_to_use */
 }
 
-GLOBAL void
+GLOBAL(void)
 jpeg_mem_term (j_common_ptr cinfo)
 {
   /* no work */
diff --git a/code/jpeg-6/jmemdos.c b/code/jpeg-6b/jmemdos.c
index 4db8ec5..60b45c6 100644
--- a/code/jpeg-6/jmemdos.c
+++ b/code/jpeg-6b/jmemdos.c
@@ -1,7 +1,7 @@
 /*
  * jmemdos.c
  *
- * Copyright (C) 1992-1994, Thomas G. Lane.
+ * Copyright (C) 1992-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -77,6 +77,10 @@ extern char * getenv JPP((const char * name));
 #define READ_BINARY	"rb"
 #endif
 
+#ifndef USE_MSDOS_MEMMGR	/* make sure user got configuration right */
+  You forgot to define USE_MSDOS_MEMMGR in jconfig.h. /* deliberate syntax error */
+#endif
+
 #if MAX_ALLOC_CHUNK >= 65535L	/* make sure jconfig.h got this right */
   MAX_ALLOC_CHUNK should be less than 64K. /* deliberate syntax error */
 #endif
@@ -85,7 +89,7 @@ extern char * getenv JPP((const char * name));
 /*
  * Declarations for assembly-language support routines (see jmemdosa.asm).
  *
- * The functions are declared "far" as are all pointer arguments;
+ * The functions are declared "far" as are all their pointer arguments;
  * this ensures the assembly source code will work regardless of the
  * compiler memory model.  We assume "short" is 16 bits, "long" is 32.
  */
@@ -100,17 +104,17 @@ typedef struct {		/* registers for calling EMS driver */
 	void far * ds_si;
       } EMScontext;
 
-EXTERN short far jdos_open JPP((short far * handle, char far * filename));
-EXTERN short far jdos_close JPP((short handle));
-EXTERN short far jdos_seek JPP((short handle, long offset));
-EXTERN short far jdos_read JPP((short handle, void far * buffer,
+extern short far jdos_open JPP((short far * handle, char far * filename));
+extern short far jdos_close JPP((short handle));
+extern short far jdos_seek JPP((short handle, long offset));
+extern short far jdos_read JPP((short handle, void far * buffer,
 				unsigned short count));
-EXTERN short far jdos_write JPP((short handle, void far * buffer,
+extern short far jdos_write JPP((short handle, void far * buffer,
 				 unsigned short count));
-EXTERN void far jxms_getdriver JPP((XMSDRIVER far *));
-EXTERN void far jxms_calldriver JPP((XMSDRIVER, XMScontext far *));
-EXTERN short far jems_available JPP((void));
-EXTERN void far jems_calldriver JPP((EMScontext far *));
+extern void far jxms_getdriver JPP((XMSDRIVER far *));
+extern void far jxms_calldriver JPP((XMSDRIVER, XMScontext far *));
+extern short far jems_available JPP((void));
+extern void far jems_calldriver JPP((EMScontext far *));
 
 
 /*
@@ -120,7 +124,7 @@ EXTERN void far jems_calldriver JPP((EMScontext far *));
 
 static int next_file_num;	/* to distinguish among several temp files */
 
-LOCAL void
+LOCAL(void)
 select_file_name (char * fname)
 {
   const char * env;
@@ -158,13 +162,13 @@ select_file_name (char * fname)
  * routines malloc() and free().
  */
 
-GLOBAL void *
+GLOBAL(void *)
 jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
 {
   return (void *) malloc(sizeofobject);
 }
 
-GLOBAL void
+GLOBAL(void)
 jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
 {
   free(object);
@@ -175,13 +179,13 @@ jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
  * "Large" objects are allocated in far memory, if possible
  */
 
-GLOBAL void FAR *
+GLOBAL(void FAR *)
 jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
 {
   return (void FAR *) far_malloc(sizeofobject);
 }
 
-GLOBAL void
+GLOBAL(void)
 jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
 {
   far_free(object);
@@ -200,7 +204,7 @@ jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
 #define DEFAULT_MAX_MEM		300000L /* for total usage about 450K */
 #endif
 
-GLOBAL long
+GLOBAL(long)
 jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
 		    long max_bytes_needed, long already_allocated)
 {
@@ -235,7 +239,7 @@ jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
  */
 
 
-METHODDEF void
+METHODDEF(void)
 read_file_store (j_common_ptr cinfo, backing_store_ptr info,
 		 void FAR * buffer_address,
 		 long file_offset, long byte_count)
@@ -251,7 +255,7 @@ read_file_store (j_common_ptr cinfo, backing_store_ptr info,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 write_file_store (j_common_ptr cinfo, backing_store_ptr info,
 		  void FAR * buffer_address,
 		  long file_offset, long byte_count)
@@ -267,7 +271,7 @@ write_file_store (j_common_ptr cinfo, backing_store_ptr info,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 close_file_store (j_common_ptr cinfo, backing_store_ptr info)
 {
   jdos_close(info->handle.file_handle);	/* close the file */
@@ -280,7 +284,7 @@ close_file_store (j_common_ptr cinfo, backing_store_ptr info)
 }
 
 
-LOCAL boolean
+LOCAL(boolean)
 open_file_store (j_common_ptr cinfo, backing_store_ptr info,
 		 long total_bytes_needed)
 {
@@ -325,7 +329,7 @@ typedef struct {		/* XMS move specification structure */
 #define ODD(X)	(((X) & 1L) != 0)
 
 
-METHODDEF void
+METHODDEF(void)
 read_xms_store (j_common_ptr cinfo, backing_store_ptr info,
 		void FAR * buffer_address,
 		long file_offset, long byte_count)
@@ -358,7 +362,7 @@ read_xms_store (j_common_ptr cinfo, backing_store_ptr info,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 write_xms_store (j_common_ptr cinfo, backing_store_ptr info,
 		 void FAR * buffer_address,
 		 long file_offset, long byte_count)
@@ -393,7 +397,7 @@ write_xms_store (j_common_ptr cinfo, backing_store_ptr info,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 close_xms_store (j_common_ptr cinfo, backing_store_ptr info)
 {
   XMScontext ctx;
@@ -406,7 +410,7 @@ close_xms_store (j_common_ptr cinfo, backing_store_ptr info)
 }
 
 
-LOCAL boolean
+LOCAL(boolean)
 open_xms_store (j_common_ptr cinfo, backing_store_ptr info,
 		long total_bytes_needed)
 {
@@ -483,7 +487,7 @@ typedef union {			/* EMS move specification structure */
 #define LOBYTE(W)  ((W) & 0xFF)
 
 
-METHODDEF void
+METHODDEF(void)
 read_ems_store (j_common_ptr cinfo, backing_store_ptr info,
 		void FAR * buffer_address,
 		long file_offset, long byte_count)
@@ -508,7 +512,7 @@ read_ems_store (j_common_ptr cinfo, backing_store_ptr info,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 write_ems_store (j_common_ptr cinfo, backing_store_ptr info,
 		 void FAR * buffer_address,
 		 long file_offset, long byte_count)
@@ -533,7 +537,7 @@ write_ems_store (j_common_ptr cinfo, backing_store_ptr info,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 close_ems_store (j_common_ptr cinfo, backing_store_ptr info)
 {
   EMScontext ctx;
@@ -546,7 +550,7 @@ close_ems_store (j_common_ptr cinfo, backing_store_ptr info)
 }
 
 
-LOCAL boolean
+LOCAL(boolean)
 open_ems_store (j_common_ptr cinfo, backing_store_ptr info,
 		long total_bytes_needed)
 {
@@ -591,7 +595,7 @@ open_ems_store (j_common_ptr cinfo, backing_store_ptr info,
  * Initial opening of a backing-store object.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
 			 long total_bytes_needed)
 {
@@ -615,14 +619,14 @@ jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
  * cleanup required.
  */
 
-GLOBAL long
+GLOBAL(long)
 jpeg_mem_init (j_common_ptr cinfo)
 {
   next_file_num = 0;		/* initialize temp file name generator */
   return DEFAULT_MAX_MEM;	/* default for max_memory_to_use */
 }
 
-GLOBAL void
+GLOBAL(void)
 jpeg_mem_term (j_common_ptr cinfo)
 {
   /* Microsoft C, at least in v6.00A, will not successfully reclaim freed
diff --git a/code/jpeg-6/jmemmgr.c b/code/jpeg-6b/jmemmgr.c
index dc3e1c7..d801b32 100644
--- a/code/jpeg-6/jmemmgr.c
+++ b/code/jpeg-6b/jmemmgr.c
@@ -1,7 +1,7 @@
 /*
  * jmemmgr.c
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -182,7 +182,7 @@ struct jvirt_barray_control {
 
 #ifdef MEM_STATS		/* optional extra stuff for statistics */
 
-LOCAL void
+LOCAL(void)
 print_mem_stats (j_common_ptr cinfo, int pool_id)
 {
   my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
@@ -213,7 +213,7 @@ print_mem_stats (j_common_ptr cinfo, int pool_id)
 #endif /* MEM_STATS */
 
 
-LOCAL void
+LOCAL(void)
 out_of_memory (j_common_ptr cinfo, int which)
 /* Report an out-of-memory error and stop execution */
 /* If we compiled MEM_STATS support, report alloc requests before dying */
@@ -253,7 +253,7 @@ static const size_t extra_pool_slop[JPOOL_NUMPOOLS] =
 #define MIN_SLOP  50		/* greater than 0 to avoid futile looping */
 
 
-METHODDEF void *
+METHODDEF(void *)
 alloc_small (j_common_ptr cinfo, int pool_id, size_t sizeofobject)
 /* Allocate a "small" object */
 {
@@ -338,7 +338,7 @@ alloc_small (j_common_ptr cinfo, int pool_id, size_t sizeofobject)
  * deliberately bunch rows together to ensure a large request size.
  */
 
-METHODDEF void FAR *
+METHODDEF(void FAR *)
 alloc_large (j_common_ptr cinfo, int pool_id, size_t sizeofobject)
 /* Allocate a "large" object */
 {
@@ -391,7 +391,7 @@ alloc_large (j_common_ptr cinfo, int pool_id, size_t sizeofobject)
  * a virtual array.
  */
 
-METHODDEF JSAMPARRAY
+METHODDEF(JSAMPARRAY)
 alloc_sarray (j_common_ptr cinfo, int pool_id,
 	      JDIMENSION samplesperrow, JDIMENSION numrows)
 /* Allocate a 2-D sample array */
@@ -439,7 +439,7 @@ alloc_sarray (j_common_ptr cinfo, int pool_id,
  * This is essentially the same as the code for sample arrays, above.
  */
 
-METHODDEF JBLOCKARRAY
+METHODDEF(JBLOCKARRAY)
 alloc_barray (j_common_ptr cinfo, int pool_id,
 	      JDIMENSION blocksperrow, JDIMENSION numrows)
 /* Allocate a 2-D coefficient-block array */
@@ -519,7 +519,7 @@ alloc_barray (j_common_ptr cinfo, int pool_id,
  */
 
 
-METHODDEF jvirt_sarray_ptr
+METHODDEF(jvirt_sarray_ptr)
 request_virt_sarray (j_common_ptr cinfo, int pool_id, boolean pre_zero,
 		     JDIMENSION samplesperrow, JDIMENSION numrows,
 		     JDIMENSION maxaccess)
@@ -549,7 +549,7 @@ request_virt_sarray (j_common_ptr cinfo, int pool_id, boolean pre_zero,
 }
 
 
-METHODDEF jvirt_barray_ptr
+METHODDEF(jvirt_barray_ptr)
 request_virt_barray (j_common_ptr cinfo, int pool_id, boolean pre_zero,
 		     JDIMENSION blocksperrow, JDIMENSION numrows,
 		     JDIMENSION maxaccess)
@@ -579,7 +579,7 @@ request_virt_barray (j_common_ptr cinfo, int pool_id, boolean pre_zero,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 realize_virt_arrays (j_common_ptr cinfo)
 /* Allocate the in-memory buffers for any unrealized virtual arrays */
 {
@@ -686,7 +686,7 @@ realize_virt_arrays (j_common_ptr cinfo)
 }
 
 
-LOCAL void
+LOCAL(void)
 do_sarray_io (j_common_ptr cinfo, jvirt_sarray_ptr ptr, boolean writing)
 /* Do backing store read or write of a virtual sample array */
 {
@@ -719,7 +719,7 @@ do_sarray_io (j_common_ptr cinfo, jvirt_sarray_ptr ptr, boolean writing)
 }
 
 
-LOCAL void
+LOCAL(void)
 do_barray_io (j_common_ptr cinfo, jvirt_barray_ptr ptr, boolean writing)
 /* Do backing store read or write of a virtual coefficient-block array */
 {
@@ -752,7 +752,7 @@ do_barray_io (j_common_ptr cinfo, jvirt_barray_ptr ptr, boolean writing)
 }
 
 
-METHODDEF JSAMPARRAY
+METHODDEF(JSAMPARRAY)
 access_virt_sarray (j_common_ptr cinfo, jvirt_sarray_ptr ptr,
 		    JDIMENSION start_row, JDIMENSION num_rows,
 		    boolean writable)
@@ -837,7 +837,7 @@ access_virt_sarray (j_common_ptr cinfo, jvirt_sarray_ptr ptr,
 }
 
 
-METHODDEF JBLOCKARRAY
+METHODDEF(JBLOCKARRAY)
 access_virt_barray (j_common_ptr cinfo, jvirt_barray_ptr ptr,
 		    JDIMENSION start_row, JDIMENSION num_rows,
 		    boolean writable)
@@ -926,7 +926,7 @@ access_virt_barray (j_common_ptr cinfo, jvirt_barray_ptr ptr,
  * Release all objects belonging to a specified pool.
  */
 
-METHODDEF void
+METHODDEF(void)
 free_pool (j_common_ptr cinfo, int pool_id)
 {
   my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
@@ -998,7 +998,7 @@ free_pool (j_common_ptr cinfo, int pool_id)
  * Note that this cannot be called unless cinfo->mem is non-NULL.
  */
 
-METHODDEF void
+METHODDEF(void)
 self_destruct (j_common_ptr cinfo)
 {
   int pool;
@@ -1024,7 +1024,7 @@ self_destruct (j_common_ptr cinfo)
  * When this is called, only the error manager pointer is valid in cinfo!
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_memory_mgr (j_common_ptr cinfo)
 {
   my_mem_ptr mem;
@@ -1076,6 +1076,9 @@ jinit_memory_mgr (j_common_ptr cinfo)
   mem->pub.free_pool = free_pool;
   mem->pub.self_destruct = self_destruct;
 
+  /* Make MAX_ALLOC_CHUNK accessible to other modules */
+  mem->pub.max_alloc_chunk = MAX_ALLOC_CHUNK;
+
   /* Initialize working state */
   mem->pub.max_memory_to_use = max_to_use;
 
diff --git a/code/jpeg-6/jmemname.c b/code/jpeg-6b/jmemname.c
index ba826fb..ed96dee 100644
--- a/code/jpeg-6/jmemname.c
+++ b/code/jpeg-6b/jmemname.c
@@ -1,7 +1,7 @@
 /*
  * jmemname.c
  *
- * Copyright (C) 1992-1994, Thomas G. Lane.
+ * Copyright (C) 1992-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -30,9 +30,14 @@ extern void free JPP((void *ptr));
 #define READ_BINARY	"r"
 #define RW_BINARY	"w+"
 #else
+#ifdef VMS			/* VMS is very nonstandard */
+#define READ_BINARY	"rb", "ctx=stm"
+#define RW_BINARY	"w+b", "ctx=stm"
+#else				/* standard ANSI-compliant case */
 #define READ_BINARY	"rb"
 #define RW_BINARY	"w+b"
 #endif
+#endif
 
 
 /*
@@ -86,7 +91,7 @@ extern int errno;
 #endif
 
 
-LOCAL void
+LOCAL(void)
 select_file_name (char * fname)
 {
   FILE * tfile;
@@ -117,7 +122,7 @@ select_file_name (char * fname)
 #define TEMP_FILE_NAME  "%sJPG%dXXXXXX"
 #endif
 
-LOCAL void
+LOCAL(void)
 select_file_name (char * fname)
 {
   next_file_num++;		/* advance counter */
@@ -134,13 +139,13 @@ select_file_name (char * fname)
  * routines malloc() and free().
  */
 
-GLOBAL void *
+GLOBAL(void *)
 jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
 {
   return (void *) malloc(sizeofobject);
 }
 
-GLOBAL void
+GLOBAL(void)
 jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
 {
   free(object);
@@ -154,13 +159,13 @@ jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
  * you probably won't be able to process useful-size images in only 64KB.
  */
 
-GLOBAL void FAR *
+GLOBAL(void FAR *)
 jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
 {
   return (void FAR *) malloc(sizeofobject);
 }
 
-GLOBAL void
+GLOBAL(void)
 jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
 {
   free(object);
@@ -179,7 +184,7 @@ jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
 #define DEFAULT_MAX_MEM		1000000L /* default: one megabyte */
 #endif
 
-GLOBAL long
+GLOBAL(long)
 jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
 		    long max_bytes_needed, long already_allocated)
 {
@@ -195,7 +200,7 @@ jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
  */
 
 
-METHODDEF void
+METHODDEF(void)
 read_backing_store (j_common_ptr cinfo, backing_store_ptr info,
 		    void FAR * buffer_address,
 		    long file_offset, long byte_count)
@@ -208,7 +213,7 @@ read_backing_store (j_common_ptr cinfo, backing_store_ptr info,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 write_backing_store (j_common_ptr cinfo, backing_store_ptr info,
 		     void FAR * buffer_address,
 		     long file_offset, long byte_count)
@@ -221,7 +226,7 @@ write_backing_store (j_common_ptr cinfo, backing_store_ptr info,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 close_backing_store (j_common_ptr cinfo, backing_store_ptr info)
 {
   fclose(info->temp_file);	/* close the file */
@@ -238,7 +243,7 @@ close_backing_store (j_common_ptr cinfo, backing_store_ptr info)
  * Initial opening of a backing-store object.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
 			 long total_bytes_needed)
 {
@@ -257,14 +262,14 @@ jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
  * cleanup required.
  */
 
-GLOBAL long
+GLOBAL(long)
 jpeg_mem_init (j_common_ptr cinfo)
 {
   next_file_num = 0;		/* initialize temp file name generator */
   return DEFAULT_MAX_MEM;	/* default for max_memory_to_use */
 }
 
-GLOBAL void
+GLOBAL(void)
 jpeg_mem_term (j_common_ptr cinfo)
 {
   /* no work */
diff --git a/code/jpeg-6/jmemnobs.c b/code/jpeg-6b/jmemnobs.c
index 87533a1..cbd6081 100644
--- a/code/jpeg-6/jmemnobs.c
+++ b/code/jpeg-6b/jmemnobs.c
@@ -1,7 +1,7 @@
 /*
  * jmemnobs.c
  *
- * Copyright (C) 1992-1994, Thomas G. Lane.
+ * Copyright (C) 1992-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -23,17 +23,17 @@
 #include "jmemsys.h"		/* import the system-dependent declarations */
 
 /*
- * Memory allocation and ri.Freeing are controlled by the regular library
+ * Memory allocation and freeing are controlled by the regular library
  * routines ri.Malloc() and ri.Free().
  */
 
-GLOBAL void *
+GLOBAL(void *)
 jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
 {
   return (void *) ri.Malloc(sizeofobject);
 }
 
-GLOBAL void
+GLOBAL(void)
 jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
 {
   ri.Free(object);
@@ -47,13 +47,13 @@ jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
  * you probably won't be able to process useful-size images in only 64KB.
  */
 
-GLOBAL void FAR *
+GLOBAL(void FAR *)
 jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
 {
   return (void FAR *) ri.Malloc(sizeofobject);
 }
 
-GLOBAL void
+GLOBAL(void)
 jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
 {
   ri.Free(object);
@@ -65,7 +65,7 @@ jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
  * Here we always say, "we got all you want bud!"
  */
 
-GLOBAL long
+GLOBAL(long)
 jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
 		    long max_bytes_needed, long already_allocated)
 {
@@ -79,7 +79,7 @@ jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
  * this should never be called and we can just error out.
  */
 
-GLOBAL void
+GLOBAL(void)
 jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
 			 long total_bytes_needed)
 {
@@ -92,13 +92,13 @@ jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
  * cleanup required.  Here, there isn't any.
  */
 
-GLOBAL long
+GLOBAL(long)
 jpeg_mem_init (j_common_ptr cinfo)
 {
   return 0;			/* just set max_memory_to_use to 0 */
 }
 
-GLOBAL void
+GLOBAL(void)
 jpeg_mem_term (j_common_ptr cinfo)
 {
   /* no work */
diff --git a/code/jpeg-6/jmemsys.h b/code/jpeg-6b/jmemsys.h
index 033d29a..6c3c6d3 100644
--- a/code/jpeg-6/jmemsys.h
+++ b/code/jpeg-6b/jmemsys.h
@@ -1,7 +1,7 @@
 /*
  * jmemsys.h
  *
- * Copyright (C) 1992-1994, Thomas G. Lane.
+ * Copyright (C) 1992-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -14,7 +14,8 @@
  * in the IJG distribution.  You may need to modify it if you write a
  * custom memory manager.  If system-dependent changes are needed in
  * this file, the best method is to #ifdef them based on a configuration
- * symbol supplied in jconfig.h, as we have done with USE_MSDOS_MEMMGR.
+ * symbol supplied in jconfig.h, as we have done with USE_MSDOS_MEMMGR
+ * and USE_MAC_MEMMGR.
  */
 
 
@@ -43,9 +44,9 @@
  * On an 80x86 machine using small-data memory model, these manage near heap.
  */
 
-EXTERN void * jpeg_get_small JPP((j_common_ptr cinfo, size_t sizeofobject));
-EXTERN void jpeg_free_small JPP((j_common_ptr cinfo, void * object,
-				 size_t sizeofobject));
+EXTERN(void *) jpeg_get_small JPP((j_common_ptr cinfo, size_t sizeofobject));
+EXTERN(void) jpeg_free_small JPP((j_common_ptr cinfo, void * object,
+				  size_t sizeofobject));
 
 /*
  * These two functions are used to allocate and release large chunks of
@@ -56,9 +57,10 @@ EXTERN void jpeg_free_small JPP((j_common_ptr cinfo, void * object,
  * in case a different allocation strategy is desirable for large chunks.
  */
 
-EXTERN void FAR * jpeg_get_large JPP((j_common_ptr cinfo,size_t sizeofobject));
-EXTERN void jpeg_free_large JPP((j_common_ptr cinfo, void FAR * object,
-				 size_t sizeofobject));
+EXTERN(void FAR *) jpeg_get_large JPP((j_common_ptr cinfo,
+				       size_t sizeofobject));
+EXTERN(void) jpeg_free_large JPP((j_common_ptr cinfo, void FAR * object,
+				  size_t sizeofobject));
 
 /*
  * The macro MAX_ALLOC_CHUNK designates the maximum number of bytes that may
@@ -98,10 +100,10 @@ EXTERN void jpeg_free_large JPP((j_common_ptr cinfo, void FAR * object,
  * Conversely, zero may be returned to always use the minimum amount of memory.
  */
 
-EXTERN long jpeg_mem_available JPP((j_common_ptr cinfo,
-				    long min_bytes_needed,
-				    long max_bytes_needed,
-				    long already_allocated));
+EXTERN(long) jpeg_mem_available JPP((j_common_ptr cinfo,
+				     long min_bytes_needed,
+				     long max_bytes_needed,
+				     long already_allocated));
 
 
 /*
@@ -113,6 +115,7 @@ EXTERN long jpeg_mem_available JPP((j_common_ptr cinfo,
 
 #define TEMP_NAME_LENGTH   64	/* max length of a temporary file's name */
 
+
 #ifdef USE_MSDOS_MEMMGR		/* DOS-specific junk */
 
 typedef unsigned short XMSH;	/* type of extended-memory handles */
@@ -126,6 +129,11 @@ typedef union {
 
 #endif /* USE_MSDOS_MEMMGR */
 
+#ifdef USE_MAC_MEMMGR		/* Mac-specific junk */
+#include <Files.h>
+#endif /* USE_MAC_MEMMGR */
+
+
 typedef struct backing_store_struct * backing_store_ptr;
 
 typedef struct backing_store_struct {
@@ -147,12 +155,20 @@ typedef struct backing_store_struct {
   handle_union handle;		/* reference to backing-store storage object */
   char temp_name[TEMP_NAME_LENGTH]; /* name if it's a file */
 #else
+#ifdef USE_MAC_MEMMGR
+  /* For the Mac manager (jmemmac.c), we need: */
+  short temp_file;		/* file reference number to temp file */
+  FSSpec tempSpec;		/* the FSSpec for the temp file */
+  char temp_name[TEMP_NAME_LENGTH]; /* name if it's a file */
+#else
   /* For a typical implementation with temp files, we need: */
   FILE * temp_file;		/* stdio reference to temp file */
   char temp_name[TEMP_NAME_LENGTH]; /* name of temp file */
 #endif
+#endif
 } backing_store_info;
 
+
 /*
  * Initial opening of a backing-store object.  This must fill in the
  * read/write/close pointers in the object.  The read/write routines
@@ -161,9 +177,9 @@ typedef struct backing_store_struct {
  * just take an error exit.)
  */
 
-EXTERN void jpeg_open_backing_store JPP((j_common_ptr cinfo,
-					 backing_store_ptr info,
-					 long total_bytes_needed));
+EXTERN(void) jpeg_open_backing_store JPP((j_common_ptr cinfo,
+					  backing_store_ptr info,
+					  long total_bytes_needed));
 
 
 /*
@@ -178,5 +194,5 @@ EXTERN void jpeg_open_backing_store JPP((j_common_ptr cinfo,
  * all opened backing-store objects have been closed.
  */
 
-EXTERN long jpeg_mem_init JPP((j_common_ptr cinfo));
-EXTERN void jpeg_mem_term JPP((j_common_ptr cinfo));
+EXTERN(long) jpeg_mem_init JPP((j_common_ptr cinfo));
+EXTERN(void) jpeg_mem_term JPP((j_common_ptr cinfo));
diff --git a/code/jpeg-6/jmorecfg.h b/code/jpeg-6b/jmorecfg.h
index 4cae5a4..f802007 100644
--- a/code/jpeg-6/jmorecfg.h
+++ b/code/jpeg-6b/jmorecfg.h
@@ -1,7 +1,7 @@
 /*
  * jmorecfg.h
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -149,6 +149,12 @@ typedef unsigned short UINT16;
 typedef unsigned int UINT16;
 #endif /* HAVE_UNSIGNED_SHORT */
 
+/* INT16 must hold at least the values -32768..32767. */
+
+#ifndef XMD_H			/* X11/xmd.h correctly defines INT16 */
+typedef short INT16;
+#endif
+
 /* INT32 must hold at least signed 32-bit values. */
 
 /* MinGW basetsd.h defines INT32 - don't redefine it */
@@ -156,12 +162,6 @@ typedef unsigned int UINT16;
 typedef long INT32;
 #endif
 
-/* INT16 must hold at least the values -32768..32767. */
-
-#ifndef XMD_H			/* X11/xmd.h correctly defines INT16 */
-typedef short INT16;
-#endif
-
 /* Datatype used for image dimensions.  The JPEG standard only supports
  * images up to 64K*64K due to 16-bit fields in SOF markers.  Therefore
  * "unsigned int" is sufficient on all machines.  However, if you need to
@@ -174,16 +174,34 @@ typedef unsigned int JDIMENSION;
 #define JPEG_MAX_DIMENSION  65500L  /* a tad under 64K to prevent overflows */
 
 
-/* These defines are used in all function definitions and extern declarations.
- * You could modify them if you need to change function linkage conventions.
+/* These macros are used in all function definitions and extern declarations.
+ * You could modify them if you need to change function linkage conventions;
+ * in particular, you'll need to do that to make the library a Windows DLL.
  * Another application is to make all functions global for use with debuggers
  * or code profilers that require it.
  */
 
-#define METHODDEF static	/* a function called through method pointers */
-#define LOCAL	  static	/* a function used only in its module */
-#define GLOBAL			/* a function referenced thru EXTERNs */
-#define EXTERN	  extern	/* a reference to a GLOBAL function */
+/* a function called through method pointers: */
+#define METHODDEF(type)		static type
+/* a function used only in its module: */
+#define LOCAL(type)		static type
+/* a function referenced thru EXTERNs: */
+#define GLOBAL(type)		type
+/* a reference to a GLOBAL function: */
+#define EXTERN(type)		extern type
+
+
+/* This macro is used to declare a "method", that is, a function pointer.
+ * We want to supply prototype parameters if the compiler can cope.
+ * Note that the arglist parameter must be parenthesized!
+ * Again, you can customize this if you need special linkage keywords.
+ */
+
+#ifdef HAVE_PROTOTYPES
+#define JMETHOD(type,methodname,arglist)  type (*methodname) arglist
+#else
+#define JMETHOD(type,methodname,arglist)  type (*methodname) ()
+#endif
 
 
 /* Here is the pseudo-keyword for declaring pointers that must be "far"
@@ -208,9 +226,7 @@ typedef unsigned int JDIMENSION;
  * Defining HAVE_BOOLEAN before including jpeglib.h should make it work.
  */
 
-//#ifndef HAVE_BOOLEAN
-//typedef int boolean;
-//#endif
+typedef unsigned char boolean;
 #ifndef FALSE			/* in case these macros already exist */
 #define FALSE	0		/* values of boolean */
 #endif
@@ -270,6 +286,7 @@ typedef unsigned int JDIMENSION;
 #undef  D_ARITH_CODING_SUPPORTED    /* Arithmetic coding back end? */
 #undef D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
 #undef D_PROGRESSIVE_SUPPORTED	    /* Progressive JPEG? (Requires MULTISCAN)*/
+#undef SAVE_MARKERS_SUPPORTED	    /* jpeg_save_markers() needed? */
 #undef BLOCK_SMOOTHING_SUPPORTED   /* Block smoothing? (Progressive only) */
 #undef IDCT_SCALING_SUPPORTED	    /* Output rescaling via IDCT? */
 #undef  UPSAMPLE_SCALING_SUPPORTED  /* Output rescaling at upsample stage? */
diff --git a/code/jpeg-6/jpegint.h b/code/jpeg-6b/jpegint.h
index ab5bee2..95b00d4 100644
--- a/code/jpeg-6/jpegint.h
+++ b/code/jpeg-6b/jpegint.h
@@ -1,7 +1,7 @@
 /*
  * jpegint.h
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -118,15 +118,16 @@ struct jpeg_entropy_encoder {
 
 /* Marker writing */
 struct jpeg_marker_writer {
-  /* write_any_marker is exported for use by applications */
-  /* Probably only COM and APPn markers should be written */
-  JMETHOD(void, write_any_marker, (j_compress_ptr cinfo, int marker,
-				   const JOCTET *dataptr, unsigned int datalen));
   JMETHOD(void, write_file_header, (j_compress_ptr cinfo));
   JMETHOD(void, write_frame_header, (j_compress_ptr cinfo));
   JMETHOD(void, write_scan_header, (j_compress_ptr cinfo));
   JMETHOD(void, write_file_trailer, (j_compress_ptr cinfo));
   JMETHOD(void, write_tables_only, (j_compress_ptr cinfo));
+  /* These routines are exported to allow insertion of extra markers */
+  /* Probably only COM and APPn markers should be written this way */
+  JMETHOD(void, write_marker_header, (j_compress_ptr cinfo, int marker,
+				      unsigned int datalen));
+  JMETHOD(void, write_marker_byte, (j_compress_ptr cinfo, int val));
 };
 
 
@@ -194,9 +195,6 @@ struct jpeg_marker_reader {
   JMETHOD(int, read_markers, (j_decompress_ptr cinfo));
   /* Read a restart marker --- exported for use by entropy decoder only */
   jpeg_marker_parser_method read_restart_marker;
-  /* Application-overridable marker processing methods */
-  jpeg_marker_parser_method process_COM;
-  jpeg_marker_parser_method process_APPn[16];
 
   /* State of marker reader --- nominally internal, but applications
    * supplying COM or APPn handlers might like to know the state.
@@ -212,6 +210,10 @@ struct jpeg_entropy_decoder {
   JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
   JMETHOD(boolean, decode_mcu, (j_decompress_ptr cinfo,
 				JBLOCKROW *MCU_data));
+
+  /* This is here to share code between baseline and progressive decoders; */
+  /* other modules probably should not use it */
+  boolean insufficient_data;	/* set TRUE after emitting warning */
 };
 
 /* Inverse DCT (also performs dequantization) */
@@ -329,53 +331,55 @@ struct jpeg_color_quantizer {
 
 
 /* Compression module initialization routines */
-EXTERN void jinit_compress_master JPP((j_compress_ptr cinfo));
-EXTERN void jinit_c_master_control JPP((j_compress_ptr cinfo,
-					boolean transcode_only));
-EXTERN void jinit_c_main_controller JPP((j_compress_ptr cinfo,
-					 boolean need_full_buffer));
-EXTERN void jinit_c_prep_controller JPP((j_compress_ptr cinfo,
-					 boolean need_full_buffer));
-EXTERN void jinit_c_coef_controller JPP((j_compress_ptr cinfo,
-					 boolean need_full_buffer));
-EXTERN void jinit_color_converter JPP((j_compress_ptr cinfo));
-EXTERN void jinit_downsampler JPP((j_compress_ptr cinfo));
-EXTERN void jinit_forward_dct JPP((j_compress_ptr cinfo));
-EXTERN void jinit_huff_encoder JPP((j_compress_ptr cinfo));
-EXTERN void jinit_phuff_encoder JPP((j_compress_ptr cinfo));
-EXTERN void jinit_marker_writer JPP((j_compress_ptr cinfo));
+EXTERN(void) jinit_compress_master JPP((j_compress_ptr cinfo));
+EXTERN(void) jinit_c_master_control JPP((j_compress_ptr cinfo,
+					 boolean transcode_only));
+EXTERN(void) jinit_c_main_controller JPP((j_compress_ptr cinfo,
+					  boolean need_full_buffer));
+EXTERN(void) jinit_c_prep_controller JPP((j_compress_ptr cinfo,
+					  boolean need_full_buffer));
+EXTERN(void) jinit_c_coef_controller JPP((j_compress_ptr cinfo,
+					  boolean need_full_buffer));
+EXTERN(void) jinit_color_converter JPP((j_compress_ptr cinfo));
+EXTERN(void) jinit_downsampler JPP((j_compress_ptr cinfo));
+EXTERN(void) jinit_forward_dct JPP((j_compress_ptr cinfo));
+EXTERN(void) jinit_huff_encoder JPP((j_compress_ptr cinfo));
+EXTERN(void) jinit_phuff_encoder JPP((j_compress_ptr cinfo));
+EXTERN(void) jinit_marker_writer JPP((j_compress_ptr cinfo));
 /* Decompression module initialization routines */
-EXTERN void jinit_master_decompress JPP((j_decompress_ptr cinfo));
-EXTERN void jinit_d_main_controller JPP((j_decompress_ptr cinfo,
-					 boolean need_full_buffer));
-EXTERN void jinit_d_coef_controller JPP((j_decompress_ptr cinfo,
-					 boolean need_full_buffer));
-EXTERN void jinit_d_post_controller JPP((j_decompress_ptr cinfo,
-					 boolean need_full_buffer));
-EXTERN void jinit_input_controller JPP((j_decompress_ptr cinfo));
-EXTERN void jinit_marker_reader JPP((j_decompress_ptr cinfo));
-EXTERN void jinit_huff_decoder JPP((j_decompress_ptr cinfo));
-EXTERN void jinit_phuff_decoder JPP((j_decompress_ptr cinfo));
-EXTERN void jinit_inverse_dct JPP((j_decompress_ptr cinfo));
-EXTERN void jinit_upsampler JPP((j_decompress_ptr cinfo));
-EXTERN void jinit_color_deconverter JPP((j_decompress_ptr cinfo));
-EXTERN void jinit_1pass_quantizer JPP((j_decompress_ptr cinfo));
-EXTERN void jinit_2pass_quantizer JPP((j_decompress_ptr cinfo));
-EXTERN void jinit_merged_upsampler JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_master_decompress JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_d_main_controller JPP((j_decompress_ptr cinfo,
+					  boolean need_full_buffer));
+EXTERN(void) jinit_d_coef_controller JPP((j_decompress_ptr cinfo,
+					  boolean need_full_buffer));
+EXTERN(void) jinit_d_post_controller JPP((j_decompress_ptr cinfo,
+					  boolean need_full_buffer));
+EXTERN(void) jinit_input_controller JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_marker_reader JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_huff_decoder JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_phuff_decoder JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_inverse_dct JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_upsampler JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_color_deconverter JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_1pass_quantizer JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_2pass_quantizer JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_merged_upsampler JPP((j_decompress_ptr cinfo));
 /* Memory manager initialization */
-EXTERN void jinit_memory_mgr JPP((j_common_ptr cinfo));
+EXTERN(void) jinit_memory_mgr JPP((j_common_ptr cinfo));
 
 /* Utility routines in jutils.c */
-EXTERN long jdiv_round_up JPP((long a, long b));
-EXTERN long jround_up JPP((long a, long b));
-EXTERN void jcopy_sample_rows JPP((JSAMPARRAY input_array, int source_row,
-				   JSAMPARRAY output_array, int dest_row,
-				   int num_rows, JDIMENSION num_cols));
-EXTERN void jcopy_block_row JPP((JBLOCKROW input_row, JBLOCKROW output_row,
-				 JDIMENSION num_blocks));
-EXTERN void jzero_far JPP((void FAR * target, size_t bytestozero));
+EXTERN(long) jdiv_round_up JPP((long a, long b));
+EXTERN(long) jround_up JPP((long a, long b));
+EXTERN(void) jcopy_sample_rows JPP((JSAMPARRAY input_array, int source_row,
+				    JSAMPARRAY output_array, int dest_row,
+				    int num_rows, JDIMENSION num_cols));
+EXTERN(void) jcopy_block_row JPP((JBLOCKROW input_row, JBLOCKROW output_row,
+				  JDIMENSION num_blocks));
+EXTERN(void) jzero_far JPP((void FAR * target, size_t bytestozero));
 /* Constant tables in jutils.c */
+#if 0				/* This table is not actually needed in v6a */
 extern const int jpeg_zigzag_order[]; /* natural coef order to zigzag order */
+#endif
 extern const int jpeg_natural_order[]; /* zigzag coef order to natural order */
 
 /* Suppress undefined-structure complaints if necessary. */
diff --git a/code/jpeg-6/jpeglib.h b/code/jpeg-6b/jpeglib.h
index a0e9e27..8ff305d 100644
--- a/code/jpeg-6/jpeglib.h
+++ b/code/jpeg-6b/jpeglib.h
@@ -1,7 +1,7 @@
 /*
  * jpeglib.h
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1998, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -13,7 +13,6 @@
 #ifndef JPEGLIB_H
 #define JPEGLIB_H
 
-typedef unsigned char boolean;
 /*
  * First we include the configuration files that record how this
  * installation of the JPEG library is set up.  jconfig.h can be
@@ -22,16 +21,16 @@ typedef unsigned char boolean;
  */
 
 #ifndef JCONFIG_INCLUDED	/* in case jinclude.h already did */
-#include "../jpeg-6/jconfig.h"		/* widely used configuration options */
+#include "../jpeg-6b/jconfig.h"		/* widely used configuration options */
 #endif
-#include "../jpeg-6/jmorecfg.h"		/* seldom changed options */
+#include "../jpeg-6b/jmorecfg.h"		/* seldom changed options */
 
 
 /* Version ID for the JPEG library.
  * Might be useful for tests like "#if JPEG_LIB_VERSION >= 60".
  */
 
-#define JPEG_LIB_VERSION  60	/* Version 6 */
+#define JPEG_LIB_VERSION  62	/* Version 6b */
 
 
 /* Various constants determining the sizes of things.
@@ -59,18 +58,6 @@ typedef unsigned char boolean;
 #endif
 
 
-/* This macro is used to declare a "method", that is, a function pointer.
- * We want to supply prototype parameters if the compiler can cope.
- * Note that the arglist parameter must be parenthesized!
- */
-
-#ifdef HAVE_PROTOTYPES
-#define JMETHOD(type,methodname,arglist)  type (*methodname) arglist
-#else
-#define JMETHOD(type,methodname,arglist)  type (*methodname) ()
-#endif
-
-
 /* Data structures for images (arrays of samples and of DCT coefficients).
  * On 80x86 machines, the image arrays are too big for near pointers,
  * but the pointer arrays can fit in near memory.
@@ -94,8 +81,9 @@ typedef JCOEF FAR *JCOEFPTR;	/* useful in a couple of places */
 /* DCT coefficient quantization tables. */
 
 typedef struct {
-  /* This field directly represents the contents of a JPEG DQT marker.
-   * Note: the values are always given in zigzag order.
+  /* This array gives the coefficient quantizers in natural array order
+   * (not the zigzag order in which they are stored in a JPEG DQT marker).
+   * CAUTION: IJG versions prior to v6a kept this array in zigzag order.
    */
   UINT16 quantval[DCTSIZE2];	/* quantization step for each coefficient */
   /* This field is used only during compression.  It's initialized FALSE when
@@ -182,7 +170,7 @@ typedef struct {
 
   /* Saved quantization table for component; NULL if none yet saved.
    * See jdinput.c comments about the need for this information.
-   * This field is not currently used by the compressor.
+   * This field is currently used only for decompression.
    */
   JQUANT_TBL * quant_table;
 
@@ -200,6 +188,18 @@ typedef struct {
   int Ah, Al;			/* progressive JPEG successive approx. parms */
 } jpeg_scan_info;
 
+/* The decompressor can save APPn and COM markers in a list of these: */
+
+typedef struct jpeg_marker_struct FAR * jpeg_saved_marker_ptr;
+
+struct jpeg_marker_struct {
+  jpeg_saved_marker_ptr next;	/* next in list, or NULL */
+  UINT8 marker;			/* marker code: JPEG_COM, or JPEG_APP0+n */
+  unsigned int original_length;	/* # bytes of data in the file */
+  unsigned int data_length;	/* # bytes of data saved at data[] */
+  JOCTET FAR * data;		/* the data contained in the marker */
+  /* the marker length word is not counted in data_length or original_length */
+};
 
 /* Known color spaces. */
 
@@ -242,8 +242,9 @@ typedef enum {
   struct jpeg_error_mgr * err;	/* Error handler module */\
   struct jpeg_memory_mgr * mem;	/* Memory manager module */\
   struct jpeg_progress_mgr * progress; /* Progress monitor, or NULL if none */\
-  boolean is_decompressor;	/* so common code can tell which is which */\
-  int global_state		/* for checking call sequence validity */
+  void * client_data;		/* Available for use by application */\
+  boolean is_decompressor;	/* So common code can tell which is which */\
+  int global_state		/* For checking call sequence validity */
 
 /* Routines that are to be used by both halves of the library are declared
  * to receive a pointer to this structure.  There are no actual instances of
@@ -334,6 +335,8 @@ struct jpeg_compress_struct {
   /* Parameters controlling emission of special markers. */
 
   boolean write_JFIF_header;	/* should a JFIF marker be written? */
+  UINT8 JFIF_major_version;	/* What to write for the JFIF version number */
+  UINT8 JFIF_minor_version;
   /* These three values are not used by the JPEG code, merely copied */
   /* into the JFIF APP0 marker.  density_unit can be 0 for unknown, */
   /* 1 for dots/inch, or 2 for dots/cm.  Note that the pixel aspect */
@@ -398,6 +401,8 @@ struct jpeg_compress_struct {
   struct jpeg_downsampler * downsample;
   struct jpeg_forward_dct * fdct;
   struct jpeg_entropy_encoder * entropy;
+  jpeg_scan_info * script_space; /* workspace for jpeg_simple_progression */
+  int script_space_size;
 };
 
 
@@ -543,7 +548,9 @@ struct jpeg_decompress_struct {
    * the JPEG library.
    */
   boolean saw_JFIF_marker;	/* TRUE iff a JFIF APP0 marker was found */
-  /* Data copied from JFIF marker: */
+  /* Data copied from JFIF marker; only valid if saw_JFIF_marker is TRUE: */
+  UINT8 JFIF_major_version;	/* JFIF version number */
+  UINT8 JFIF_minor_version;
   UINT8 density_unit;		/* JFIF code for pixel size units */
   UINT16 X_density;		/* Horizontal pixel density */
   UINT16 Y_density;		/* Vertical pixel density */
@@ -552,6 +559,12 @@ struct jpeg_decompress_struct {
 
   boolean CCIR601_sampling;	/* TRUE=first samples are cosited */
 
+  /* Aside from the specific data retained from APPn markers known to the
+   * library, the uninterpreted contents of any or all APPn and COM markers
+   * can be saved in a list for examination by the application.
+   */
+  jpeg_saved_marker_ptr marker_list; /* Head of list of saved markers */
+
   /* Remaining fields are known throughout decompressor, but generally
    * should not be touched by a surrounding application.
    */
@@ -784,6 +797,9 @@ struct jpeg_memory_mgr {
    * after creating the JPEG object.
    */
   long max_memory_to_use;
+
+  /* Maximum allocation request accepted by alloc_large. */
+  long max_alloc_chunk;
 };
 
 
@@ -814,12 +830,12 @@ typedef JMETHOD(boolean, jpeg_marker_parser_method, (j_decompress_ptr cinfo));
 
 #ifdef NEED_SHORT_EXTERNAL_NAMES
 #define jpeg_std_error		jStdError
-#define jpeg_create_compress	jCreaCompress
-#define jpeg_create_decompress	jCreaDecompress
+#define jpeg_CreateCompress	jCreaCompress
+#define jpeg_CreateDecompress	jCreaDecompress
 #define jpeg_destroy_compress	jDestCompress
 #define jpeg_destroy_decompress	jDestDecompress
 #define jpeg_stdio_dest		jStdDest
-#define jpeg_stdio_src		jStdSrc
+#define jpeg_mem_src		jMemSrc
 #define jpeg_set_defaults	jSetDefaults
 #define jpeg_set_colorspace	jSetColorspace
 #define jpeg_default_colorspace	jDefColorspace
@@ -836,6 +852,8 @@ typedef JMETHOD(boolean, jpeg_marker_parser_method, (j_decompress_ptr cinfo));
 #define jpeg_finish_compress	jFinCompress
 #define jpeg_write_raw_data	jWrtRawData
 #define jpeg_write_marker	jWrtMarker
+#define jpeg_write_m_header	jWrtMHeader
+#define jpeg_write_m_byte	jWrtMByte
 #define jpeg_write_tables	jWrtTables
 #define jpeg_read_header	jReadHeader
 #define jpeg_start_decompress	jStrtDecompress
@@ -849,6 +867,7 @@ typedef JMETHOD(boolean, jpeg_marker_parser_method, (j_decompress_ptr cinfo));
 #define jpeg_new_colormap	jNewCMap
 #define jpeg_consume_input	jConsumeInput
 #define jpeg_calc_output_dimensions	jCalcDimensions
+#define jpeg_save_markers	jSaveMarkers
 #define jpeg_set_marker_processor	jSetMarker
 #define jpeg_read_coefficients	jReadCoefs
 #define jpeg_write_coefficients	jWrtCoefs
@@ -862,65 +881,86 @@ typedef JMETHOD(boolean, jpeg_marker_parser_method, (j_decompress_ptr cinfo));
 
 
 /* Default error-management setup */
-EXTERN struct jpeg_error_mgr *jpeg_std_error JPP((struct jpeg_error_mgr *err));
-
-/* Initialization and destruction of JPEG compression objects */
-/* NB: you must set up the error-manager BEFORE calling jpeg_create_xxx */
-EXTERN void jpeg_create_compress JPP((j_compress_ptr cinfo));
-EXTERN void jpeg_create_decompress JPP((j_decompress_ptr cinfo));
-EXTERN void jpeg_destroy_compress JPP((j_compress_ptr cinfo));
-EXTERN void jpeg_destroy_decompress JPP((j_decompress_ptr cinfo));
+EXTERN(struct jpeg_error_mgr *) jpeg_std_error
+	JPP((struct jpeg_error_mgr * err));
+
+/* Initialization of JPEG compression objects.
+ * jpeg_create_compress() and jpeg_create_decompress() are the exported
+ * names that applications should call.  These expand to calls on
+ * jpeg_CreateCompress and jpeg_CreateDecompress with additional information
+ * passed for version mismatch checking.
+ * NB: you must set up the error-manager BEFORE calling jpeg_create_xxx.
+ */
+#define jpeg_create_compress(cinfo) \
+    jpeg_CreateCompress((cinfo), JPEG_LIB_VERSION, \
+			(size_t) sizeof(struct jpeg_compress_struct))
+#define jpeg_create_decompress(cinfo) \
+    jpeg_CreateDecompress((cinfo), JPEG_LIB_VERSION, \
+			  (size_t) sizeof(struct jpeg_decompress_struct))
+EXTERN(void) jpeg_CreateCompress JPP((j_compress_ptr cinfo,
+				      int version, size_t structsize));
+EXTERN(void) jpeg_CreateDecompress JPP((j_decompress_ptr cinfo,
+					int version, size_t structsize));
+/* Destruction of JPEG compression objects */
+EXTERN(void) jpeg_destroy_compress JPP((j_compress_ptr cinfo));
+EXTERN(void) jpeg_destroy_decompress JPP((j_decompress_ptr cinfo));
 
 /* Standard data source and destination managers: stdio streams. */
 /* Caller is responsible for opening the file before and closing after. */
-EXTERN void jpeg_stdio_dest JPP((j_compress_ptr cinfo, FILE * outfile));
-EXTERN void jpeg_mem_src JPP((j_decompress_ptr cinfo, unsigned char *buffer, size_t size));
+EXTERN(void) jpeg_stdio_dest JPP((j_compress_ptr cinfo, FILE * outfile));
+EXTERN(void) jpeg_mem_src JPP((j_decompress_ptr cinfo, unsigned char *inbuf, size_t size));
 
 /* Default parameter setup for compression */
-EXTERN void jpeg_set_defaults JPP((j_compress_ptr cinfo));
+EXTERN(void) jpeg_set_defaults JPP((j_compress_ptr cinfo));
 /* Compression parameter setup aids */
-EXTERN void jpeg_set_colorspace JPP((j_compress_ptr cinfo,
-				     J_COLOR_SPACE colorspace));
-EXTERN void jpeg_default_colorspace JPP((j_compress_ptr cinfo));
-EXTERN void jpeg_set_quality JPP((j_compress_ptr cinfo, int quality,
-				  boolean force_baseline));
-EXTERN void jpeg_set_linear_quality JPP((j_compress_ptr cinfo,
-					 int scale_factor,
-					 boolean force_baseline));
-EXTERN void jpeg_add_quant_table JPP((j_compress_ptr cinfo, int which_tbl,
-				      const unsigned int *basic_table,
-				      int scale_factor,
-				      boolean force_baseline));
-EXTERN int jpeg_quality_scaling JPP((int quality));
-EXTERN void jpeg_simple_progression JPP((j_compress_ptr cinfo));
-EXTERN void jpeg_suppress_tables JPP((j_compress_ptr cinfo,
-				      boolean suppress));
-EXTERN JQUANT_TBL * jpeg_alloc_quant_table JPP((j_common_ptr cinfo));
-EXTERN JHUFF_TBL * jpeg_alloc_huff_table JPP((j_common_ptr cinfo));
+EXTERN(void) jpeg_set_colorspace JPP((j_compress_ptr cinfo,
+				      J_COLOR_SPACE colorspace));
+EXTERN(void) jpeg_default_colorspace JPP((j_compress_ptr cinfo));
+EXTERN(void) jpeg_set_quality JPP((j_compress_ptr cinfo, int quality,
+				   boolean force_baseline));
+EXTERN(void) jpeg_set_linear_quality JPP((j_compress_ptr cinfo,
+					  int scale_factor,
+					  boolean force_baseline));
+EXTERN(void) jpeg_add_quant_table JPP((j_compress_ptr cinfo, int which_tbl,
+				       const unsigned int *basic_table,
+				       int scale_factor,
+				       boolean force_baseline));
+EXTERN(int) jpeg_quality_scaling JPP((int quality));
+EXTERN(void) jpeg_simple_progression JPP((j_compress_ptr cinfo));
+EXTERN(void) jpeg_suppress_tables JPP((j_compress_ptr cinfo,
+				       boolean suppress));
+EXTERN(JQUANT_TBL *) jpeg_alloc_quant_table JPP((j_common_ptr cinfo));
+EXTERN(JHUFF_TBL *) jpeg_alloc_huff_table JPP((j_common_ptr cinfo));
 
 /* Main entry points for compression */
-EXTERN void jpeg_start_compress JPP((j_compress_ptr cinfo,
-				     boolean write_all_tables));
-EXTERN JDIMENSION jpeg_write_scanlines JPP((j_compress_ptr cinfo,
-					    JSAMPARRAY scanlines,
-					    JDIMENSION num_lines));
-EXTERN void jpeg_finish_compress JPP((j_compress_ptr cinfo));
+EXTERN(void) jpeg_start_compress JPP((j_compress_ptr cinfo,
+				      boolean write_all_tables));
+EXTERN(JDIMENSION) jpeg_write_scanlines JPP((j_compress_ptr cinfo,
+					     JSAMPARRAY scanlines,
+					     JDIMENSION num_lines));
+EXTERN(void) jpeg_finish_compress JPP((j_compress_ptr cinfo));
 
 /* Replaces jpeg_write_scanlines when writing raw downsampled data. */
-EXTERN JDIMENSION jpeg_write_raw_data JPP((j_compress_ptr cinfo,
-					   JSAMPIMAGE data,
-					   JDIMENSION num_lines));
+EXTERN(JDIMENSION) jpeg_write_raw_data JPP((j_compress_ptr cinfo,
+					    JSAMPIMAGE data,
+					    JDIMENSION num_lines));
 
 /* Write a special marker.  See libjpeg.doc concerning safe usage. */
-EXTERN void jpeg_write_marker JPP((j_compress_ptr cinfo, int marker,
-				   const JOCTET *dataptr, unsigned int datalen));
+EXTERN(void) jpeg_write_marker
+	JPP((j_compress_ptr cinfo, int marker,
+	     const JOCTET * dataptr, unsigned int datalen));
+/* Same, but piecemeal. */
+EXTERN(void) jpeg_write_m_header
+	JPP((j_compress_ptr cinfo, int marker, unsigned int datalen));
+EXTERN(void) jpeg_write_m_byte
+	JPP((j_compress_ptr cinfo, int val));
 
 /* Alternate compression function: just write an abbreviated table file */
-EXTERN void jpeg_write_tables JPP((j_compress_ptr cinfo));
+EXTERN(void) jpeg_write_tables JPP((j_compress_ptr cinfo));
 
 /* Decompression startup: read start of JPEG datastream to see what's there */
-EXTERN int jpeg_read_header JPP((j_decompress_ptr cinfo,
-				 boolean require_image));
+EXTERN(int) jpeg_read_header JPP((j_decompress_ptr cinfo,
+				  boolean require_image));
 /* Return value is one of: */
 #define JPEG_SUSPENDED		0 /* Suspended due to lack of input data */
 #define JPEG_HEADER_OK		1 /* Found valid image datastream */
@@ -932,25 +972,25 @@ EXTERN int jpeg_read_header JPP((j_decompress_ptr cinfo,
  */
 
 /* Main entry points for decompression */
-EXTERN boolean jpeg_start_decompress JPP((j_decompress_ptr cinfo));
-EXTERN JDIMENSION jpeg_read_scanlines JPP((j_decompress_ptr cinfo,
-					   JSAMPARRAY scanlines,
-					   JDIMENSION max_lines));
-EXTERN boolean jpeg_finish_decompress JPP((j_decompress_ptr cinfo));
+EXTERN(boolean) jpeg_start_decompress JPP((j_decompress_ptr cinfo));
+EXTERN(JDIMENSION) jpeg_read_scanlines JPP((j_decompress_ptr cinfo,
+					    JSAMPARRAY scanlines,
+					    JDIMENSION max_lines));
+EXTERN(boolean) jpeg_finish_decompress JPP((j_decompress_ptr cinfo));
 
 /* Replaces jpeg_read_scanlines when reading raw downsampled data. */
-EXTERN JDIMENSION jpeg_read_raw_data JPP((j_decompress_ptr cinfo,
-					  JSAMPIMAGE data,
-					  JDIMENSION max_lines));
+EXTERN(JDIMENSION) jpeg_read_raw_data JPP((j_decompress_ptr cinfo,
+					   JSAMPIMAGE data,
+					   JDIMENSION max_lines));
 
 /* Additional entry points for buffered-image mode. */
-EXTERN boolean jpeg_has_multiple_scans JPP((j_decompress_ptr cinfo));
-EXTERN boolean jpeg_start_output JPP((j_decompress_ptr cinfo,
-				      int scan_number));
-EXTERN boolean jpeg_finish_output JPP((j_decompress_ptr cinfo));
-EXTERN boolean jpeg_input_complete JPP((j_decompress_ptr cinfo));
-EXTERN void jpeg_new_colormap JPP((j_decompress_ptr cinfo));
-EXTERN int jpeg_consume_input JPP((j_decompress_ptr cinfo));
+EXTERN(boolean) jpeg_has_multiple_scans JPP((j_decompress_ptr cinfo));
+EXTERN(boolean) jpeg_start_output JPP((j_decompress_ptr cinfo,
+				       int scan_number));
+EXTERN(boolean) jpeg_finish_output JPP((j_decompress_ptr cinfo));
+EXTERN(boolean) jpeg_input_complete JPP((j_decompress_ptr cinfo));
+EXTERN(void) jpeg_new_colormap JPP((j_decompress_ptr cinfo));
+EXTERN(int) jpeg_consume_input JPP((j_decompress_ptr cinfo));
 /* Return value is one of: */
 /* #define JPEG_SUSPENDED	0    Suspended due to lack of input data */
 #define JPEG_REACHED_SOS	1 /* Reached start of new scan */
@@ -959,19 +999,24 @@ EXTERN int jpeg_consume_input JPP((j_decompress_ptr cinfo));
 #define JPEG_SCAN_COMPLETED	4 /* Completed last iMCU row of a scan */
 
 /* Precalculate output dimensions for current decompression parameters. */
-EXTERN void jpeg_calc_output_dimensions JPP((j_decompress_ptr cinfo));
+EXTERN(void) jpeg_calc_output_dimensions JPP((j_decompress_ptr cinfo));
+
+/* Control saving of COM and APPn markers into marker_list. */
+EXTERN(void) jpeg_save_markers
+	JPP((j_decompress_ptr cinfo, int marker_code,
+	     unsigned int length_limit));
 
 /* Install a special processing method for COM or APPn markers. */
-EXTERN void jpeg_set_marker_processor JPP((j_decompress_ptr cinfo,
-					   int marker_code,
-					   jpeg_marker_parser_method routine));
+EXTERN(void) jpeg_set_marker_processor
+	JPP((j_decompress_ptr cinfo, int marker_code,
+	     jpeg_marker_parser_method routine));
 
 /* Read or write raw DCT coefficients --- useful for lossless transcoding. */
-EXTERN jvirt_barray_ptr * jpeg_read_coefficients JPP((j_decompress_ptr cinfo));
-EXTERN void jpeg_write_coefficients JPP((j_compress_ptr cinfo,
-					 jvirt_barray_ptr * coef_arrays));
-EXTERN void jpeg_copy_critical_parameters JPP((j_decompress_ptr srcinfo,
-					       j_compress_ptr dstinfo));
+EXTERN(jvirt_barray_ptr *) jpeg_read_coefficients JPP((j_decompress_ptr cinfo));
+EXTERN(void) jpeg_write_coefficients JPP((j_compress_ptr cinfo,
+					  jvirt_barray_ptr * coef_arrays));
+EXTERN(void) jpeg_copy_critical_parameters JPP((j_decompress_ptr srcinfo,
+						j_compress_ptr dstinfo));
 
 /* If you choose to abort compression or decompression before completing
  * jpeg_finish_(de)compress, then you need to clean up to release memory,
@@ -979,18 +1024,18 @@ EXTERN void jpeg_copy_critical_parameters JPP((j_decompress_ptr srcinfo,
  * if you're done with the JPEG object, but if you want to clean it up and
  * reuse it, call this:
  */
-EXTERN void jpeg_abort_compress JPP((j_compress_ptr cinfo));
-EXTERN void jpeg_abort_decompress JPP((j_decompress_ptr cinfo));
+EXTERN(void) jpeg_abort_compress JPP((j_compress_ptr cinfo));
+EXTERN(void) jpeg_abort_decompress JPP((j_decompress_ptr cinfo));
 
 /* Generic versions of jpeg_abort and jpeg_destroy that work on either
  * flavor of JPEG object.  These may be more convenient in some places.
  */
-EXTERN void jpeg_abort JPP((j_common_ptr cinfo));
-EXTERN void jpeg_destroy JPP((j_common_ptr cinfo));
+EXTERN(void) jpeg_abort JPP((j_common_ptr cinfo));
+EXTERN(void) jpeg_destroy JPP((j_common_ptr cinfo));
 
 /* Default restart-marker-resync procedure for use by data source modules */
-EXTERN boolean jpeg_resync_to_restart JPP((j_decompress_ptr cinfo,
-					   int desired));
+EXTERN(boolean) jpeg_resync_to_restart JPP((j_decompress_ptr cinfo,
+					    int desired));
 
 
 /* These marker codes are exported since applications and data source modules
@@ -1044,8 +1089,8 @@ struct jpeg_color_quantizer { long dummy; };
  */
 
 #ifdef JPEG_INTERNALS
-#include "../jpeg-6/jpegint.h"		/* fetch private declarations */
-#include "../jpeg-6/jerror.h"		/* fetch error codes too */
+#include "../jpeg-6b/jpegint.h"		/* fetch private declarations */
+#include "../jpeg-6b/jerror.h"		/* fetch error codes too */
 #endif
 
 #endif /* JPEGLIB_H */
diff --git a/code/jpeg-6/jpegtran.c b/code/jpeg-6b/jpegtran.c
index f602c6b..20ef111 100644
--- a/code/jpeg-6/jpegtran.c
+++ b/code/jpeg-6b/jpegtran.c
@@ -1,21 +1,24 @@
 /*
  * jpegtran.c
  *
- * Copyright (C) 1995, Thomas G. Lane.
+ * Copyright (C) 1995-1997, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
  * This file contains a command-line user interface for JPEG transcoding.
  * It is very similar to cjpeg.c, but provides lossless transcoding between
- * different JPEG file formats.
+ * different JPEG file formats.  It also provides some lossless and sort-of-
+ * lossless transformations of JPEG data.
  */
 
 #include "cdjpeg.h"		/* Common decls for cjpeg/djpeg applications */
+#include "transupp.h"		/* Support routines for jpegtran */
 #include "jversion.h"		/* for version message */
 
 #ifdef USE_CCOMMAND		/* command-line reader for Macintosh */
 #ifdef __MWERKS__
-#include <SIOUX.h>              /* Metrowerks declares it here */
+#include <SIOUX.h>              /* Metrowerks needs this */
+#include <console.h>		/* ... and this */
 #endif
 #ifdef THINK_C
 #include <console.h>		/* Think declares it here */
@@ -34,9 +37,11 @@
 
 static const char * progname;	/* program name for error messages */
 static char * outfilename;	/* for -outfile switch */
+static JCOPY_OPTION copyoption;	/* -copy switch */
+static jpeg_transform_info transformoption; /* image transformation options */
 
 
-LOCAL void
+LOCAL(void)
 usage (void)
 /* complain about bad command line */
 {
@@ -48,12 +53,24 @@ usage (void)
 #endif
 
   fprintf(stderr, "Switches (names may be abbreviated):\n");
+  fprintf(stderr, "  -copy none     Copy no extra markers from source file\n");
+  fprintf(stderr, "  -copy comments Copy only comment markers (default)\n");
+  fprintf(stderr, "  -copy all      Copy all extra markers\n");
 #ifdef ENTROPY_OPT_SUPPORTED
   fprintf(stderr, "  -optimize      Optimize Huffman table (smaller file, but slow compression)\n");
 #endif
 #ifdef C_PROGRESSIVE_SUPPORTED
   fprintf(stderr, "  -progressive   Create progressive JPEG file\n");
 #endif
+#if TRANSFORMS_SUPPORTED
+  fprintf(stderr, "Switches for modifying the image:\n");
+  fprintf(stderr, "  -grayscale     Reduce to grayscale (omit color data)\n");
+  fprintf(stderr, "  -flip [horizontal|vertical]  Mirror image (left-right or top-bottom)\n");
+  fprintf(stderr, "  -rotate [90|180|270]         Rotate image (degrees clockwise)\n");
+  fprintf(stderr, "  -transpose     Transpose image\n");
+  fprintf(stderr, "  -transverse    Transverse transpose image\n");
+  fprintf(stderr, "  -trim          Drop non-transformable edge blocks\n");
+#endif /* TRANSFORMS_SUPPORTED */
   fprintf(stderr, "Switches for advanced users:\n");
   fprintf(stderr, "  -restart N     Set restart interval in rows, or in blocks with B\n");
   fprintf(stderr, "  -maxmemory N   Maximum memory to use (in kbytes)\n");
@@ -70,7 +87,30 @@ usage (void)
 }
 
 
-LOCAL int
+LOCAL(void)
+select_transform (JXFORM_CODE transform)
+/* Silly little routine to detect multiple transform options,
+ * which we can't handle.
+ */
+{
+#if TRANSFORMS_SUPPORTED
+  if (transformoption.transform == JXFORM_NONE ||
+      transformoption.transform == transform) {
+    transformoption.transform = transform;
+  } else {
+    fprintf(stderr, "%s: can only do one image transformation at a time\n",
+	    progname);
+    usage();
+  }
+#else
+  fprintf(stderr, "%s: sorry, image transformation was not compiled\n",
+	  progname);
+  exit(EXIT_FAILURE);
+#endif
+}
+
+
+LOCAL(int)
 parse_switches (j_compress_ptr cinfo, int argc, char **argv,
 		int last_file_arg_seen, boolean for_real)
 /* Parse optional switches.
@@ -90,6 +130,10 @@ parse_switches (j_compress_ptr cinfo, int argc, char **argv,
   /* Set up default JPEG parameters. */
   simple_progressive = FALSE;
   outfilename = NULL;
+  copyoption = JCOPYOPT_DEFAULT;
+  transformoption.transform = JXFORM_NONE;
+  transformoption.trim = FALSE;
+  transformoption.force_grayscale = FALSE;
   cinfo->err->trace_level = 0;
 
   /* Scan command line options, adjust parameters */
@@ -116,6 +160,19 @@ parse_switches (j_compress_ptr cinfo, int argc, char **argv,
       exit(EXIT_FAILURE);
 #endif
 
+    } else if (keymatch(arg, "copy", 1)) {
+      /* Select which extra markers to copy. */
+      if (++argn >= argc)	/* advance to next argument */
+	usage();
+      if (keymatch(argv[argn], "none", 1)) {
+	copyoption = JCOPYOPT_NONE;
+      } else if (keymatch(argv[argn], "comments", 1)) {
+	copyoption = JCOPYOPT_COMMENTS;
+      } else if (keymatch(argv[argn], "all", 1)) {
+	copyoption = JCOPYOPT_ALL;
+      } else
+	usage();
+
     } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
       /* Enable debug printouts. */
       /* On first -d, print version identification */
@@ -128,6 +185,25 @@ parse_switches (j_compress_ptr cinfo, int argc, char **argv,
       }
       cinfo->err->trace_level++;
 
+    } else if (keymatch(arg, "flip", 1)) {
+      /* Mirror left-right or top-bottom. */
+      if (++argn >= argc)	/* advance to next argument */
+	usage();
+      if (keymatch(argv[argn], "horizontal", 1))
+	select_transform(JXFORM_FLIP_H);
+      else if (keymatch(argv[argn], "vertical", 1))
+	select_transform(JXFORM_FLIP_V);
+      else
+	usage();
+
+    } else if (keymatch(arg, "grayscale", 1) || keymatch(arg, "greyscale",1)) {
+      /* Force to grayscale. */
+#if TRANSFORMS_SUPPORTED
+      transformoption.force_grayscale = TRUE;
+#else
+      select_transform(JXFORM_NONE);	/* force an error */
+#endif
+
     } else if (keymatch(arg, "maxmemory", 3)) {
       /* Maximum memory in Kb (or Mb with 'm'). */
       long lval;
@@ -187,7 +263,20 @@ parse_switches (j_compress_ptr cinfo, int argc, char **argv,
 	/* restart_interval will be computed during startup */
       }
 
-    } else if (keymatch(arg, "scans", 2)) {
+    } else if (keymatch(arg, "rotate", 2)) {
+      /* Rotate 90, 180, or 270 degrees (measured clockwise). */
+      if (++argn >= argc)	/* advance to next argument */
+	usage();
+      if (keymatch(argv[argn], "90", 2))
+	select_transform(JXFORM_ROT_90);
+      else if (keymatch(argv[argn], "180", 3))
+	select_transform(JXFORM_ROT_180);
+      else if (keymatch(argv[argn], "270", 3))
+	select_transform(JXFORM_ROT_270);
+      else
+	usage();
+
+    } else if (keymatch(arg, "scans", 1)) {
       /* Set scan script. */
 #ifdef C_MULTISCAN_FILES_SUPPORTED
       if (++argn >= argc)	/* advance to next argument */
@@ -200,6 +289,18 @@ parse_switches (j_compress_ptr cinfo, int argc, char **argv,
       exit(EXIT_FAILURE);
 #endif
 
+    } else if (keymatch(arg, "transpose", 1)) {
+      /* Transpose (across UL-to-LR axis). */
+      select_transform(JXFORM_TRANSPOSE);
+
+    } else if (keymatch(arg, "transverse", 6)) {
+      /* Transverse transpose (across UR-to-LL axis). */
+      select_transform(JXFORM_TRANSVERSE);
+
+    } else if (keymatch(arg, "trim", 3)) {
+      /* Trim off any partial edge MCUs that the transform can't handle. */
+      transformoption.trim = TRUE;
+
     } else {
       usage();			/* bogus switch */
     }
@@ -229,7 +330,7 @@ parse_switches (j_compress_ptr cinfo, int argc, char **argv,
  * The main program.
  */
 
-GLOBAL int
+int
 main (int argc, char **argv)
 {
   struct jpeg_decompress_struct srcinfo;
@@ -238,7 +339,8 @@ main (int argc, char **argv)
 #ifdef PROGRESS_REPORT
   struct cdjpeg_progress_mgr progress;
 #endif
-  jvirt_barray_ptr * coef_arrays;
+  jvirt_barray_ptr * src_coef_arrays;
+  jvirt_barray_ptr * dst_coef_arrays;
   int file_index;
   FILE * input_file;
   FILE * output_file;
@@ -268,12 +370,15 @@ main (int argc, char **argv)
 
   /* Scan command line to find file names.
    * It is convenient to use just one switch-parsing routine, but the switch
-   * values read here are ignored; we will rescan the switches after opening
-   * the input file.
+   * values read here are mostly ignored; we will rescan the switches after
+   * opening the input file.  Also note that most of the switches affect the
+   * destination JPEG object, so we parse into that and then copy over what
+   * needs to affects the source too.
    */
 
   file_index = parse_switches(&dstinfo, argc, argv, 0, FALSE);
   jsrcerr.trace_level = jdsterr.trace_level;
+  srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use;
 
 #ifdef TWO_FILE_COMMANDLINE
   /* Must have either -outfile switch or explicit output file name */
@@ -328,25 +433,54 @@ main (int argc, char **argv)
   /* Specify data source for decompression */
   jpeg_stdio_src(&srcinfo, input_file);
 
+  /* Enable saving of extra markers that we want to copy */
+  jcopy_markers_setup(&srcinfo, copyoption);
+
   /* Read file header */
   (void) jpeg_read_header(&srcinfo, TRUE);
 
+  /* Any space needed by a transform option must be requested before
+   * jpeg_read_coefficients so that memory allocation will be done right.
+   */
+#if TRANSFORMS_SUPPORTED
+  jtransform_request_workspace(&srcinfo, &transformoption);
+#endif
+
   /* Read source file as DCT coefficients */
-  coef_arrays = jpeg_read_coefficients(&srcinfo);
+  src_coef_arrays = jpeg_read_coefficients(&srcinfo);
 
   /* Initialize destination compression parameters from source values */
   jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
 
+  /* Adjust destination parameters if required by transform options;
+   * also find out which set of coefficient arrays will hold the output.
+   */
+#if TRANSFORMS_SUPPORTED
+  dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
+						 src_coef_arrays,
+						 &transformoption);
+#else
+  dst_coef_arrays = src_coef_arrays;
+#endif
+
   /* Adjust default compression parameters by re-parsing the options */
   file_index = parse_switches(&dstinfo, argc, argv, 0, TRUE);
 
   /* Specify data destination for compression */
   jpeg_stdio_dest(&dstinfo, output_file);
 
-  /* Start compressor */
-  jpeg_write_coefficients(&dstinfo, coef_arrays);
+  /* Start compressor (note no image data is actually written here) */
+  jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
 
-  /* ought to copy source comments here... */
+  /* Copy to the output file any extra markers that we want to preserve */
+  jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
+
+  /* Execute image transformation, if any */
+#if TRANSFORMS_SUPPORTED
+  jtransform_execute_transformation(&srcinfo, &dstinfo,
+				    src_coef_arrays,
+				    &transformoption);
+#endif
 
   /* Finish compression and release memory */
   jpeg_finish_compress(&dstinfo);
diff --git a/code/jpeg-6/jquant1.c b/code/jpeg-6b/jquant1.c
index 035e79a..b2f96aa 100644
--- a/code/jpeg-6/jquant1.c
+++ b/code/jpeg-6b/jquant1.c
@@ -1,7 +1,7 @@
 /*
  * jquant1.c
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -182,7 +182,7 @@ typedef my_cquantizer * my_cquantize_ptr;
  */
 
 
-LOCAL int
+LOCAL(int)
 select_ncolors (j_decompress_ptr cinfo, int Ncolors[])
 /* Determine allocation of desired colors to components, */
 /* and fill in Ncolors[] array to indicate choice. */
@@ -241,7 +241,7 @@ select_ncolors (j_decompress_ptr cinfo, int Ncolors[])
 }
 
 
-LOCAL int
+LOCAL(int)
 output_value (j_decompress_ptr cinfo, int ci, int j, int maxj)
 /* Return j'th output value, where j will range from 0 to maxj */
 /* The output values must fall in 0..MAXJSAMPLE in increasing order */
@@ -255,7 +255,7 @@ output_value (j_decompress_ptr cinfo, int ci, int j, int maxj)
 }
 
 
-LOCAL int
+LOCAL(int)
 largest_input_value (j_decompress_ptr cinfo, int ci, int j, int maxj)
 /* Return largest input value that should map to j'th output value */
 /* Must have largest(j=0) >= 0, and largest(j=maxj) >= MAXJSAMPLE */
@@ -269,7 +269,7 @@ largest_input_value (j_decompress_ptr cinfo, int ci, int j, int maxj)
  * Create the colormap.
  */
 
-LOCAL void
+LOCAL(void)
 create_colormap (j_decompress_ptr cinfo)
 {
   my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
@@ -329,7 +329,7 @@ create_colormap (j_decompress_ptr cinfo)
  * Create the color index table.
  */
 
-LOCAL void
+LOCAL(void)
 create_colorindex (j_decompress_ptr cinfo)
 {
   my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
@@ -392,7 +392,7 @@ create_colorindex (j_decompress_ptr cinfo)
  * distinct output values.
  */
 
-LOCAL ODITHER_MATRIX_PTR
+LOCAL(ODITHER_MATRIX_PTR)
 make_odither_array (j_decompress_ptr cinfo, int ncolors)
 {
   ODITHER_MATRIX_PTR odither;
@@ -428,7 +428,7 @@ make_odither_array (j_decompress_ptr cinfo, int ncolors)
  * share a dither table.
  */
 
-LOCAL void
+LOCAL(void)
 create_odither_tables (j_decompress_ptr cinfo)
 {
   my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
@@ -455,7 +455,7 @@ create_odither_tables (j_decompress_ptr cinfo)
  * Map some rows of pixels to the output colormapped representation.
  */
 
-METHODDEF void
+METHODDEF(void)
 color_quantize (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
 		JSAMPARRAY output_buf, int num_rows)
 /* General case, no dithering */
@@ -483,7 +483,7 @@ color_quantize (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 color_quantize3 (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
 		 JSAMPARRAY output_buf, int num_rows)
 /* Fast path for out_color_components==3, no dithering */
@@ -511,7 +511,7 @@ color_quantize3 (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 quantize_ord_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
 		     JSAMPARRAY output_buf, int num_rows)
 /* General case, with ordered dithering */
@@ -561,7 +561,7 @@ quantize_ord_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 quantize3_ord_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
 		      JSAMPARRAY output_buf, int num_rows)
 /* Fast path for out_color_components==3, with ordered dithering */
@@ -606,7 +606,7 @@ quantize3_ord_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 quantize_fs_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
 		    JSAMPARRAY output_buf, int num_rows)
 /* General case, with Floyd-Steinberg dithering */
@@ -718,7 +718,7 @@ quantize_fs_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
  * Allocate workspace for Floyd-Steinberg errors.
  */
 
-LOCAL void
+LOCAL(void)
 alloc_fs_workspace (j_decompress_ptr cinfo)
 {
   my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
@@ -737,7 +737,7 @@ alloc_fs_workspace (j_decompress_ptr cinfo)
  * Initialize for one-pass color quantization.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_1_quant (j_decompress_ptr cinfo, boolean is_pre_scan)
 {
   my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
@@ -794,7 +794,7 @@ start_pass_1_quant (j_decompress_ptr cinfo, boolean is_pre_scan)
  * Finish up at the end of the pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 finish_pass_1_quant (j_decompress_ptr cinfo)
 {
   /* no work in 1-pass case */
@@ -806,7 +806,7 @@ finish_pass_1_quant (j_decompress_ptr cinfo)
  * Shouldn't get to this module!
  */
 
-METHODDEF void
+METHODDEF(void)
 new_color_map_1_quant (j_decompress_ptr cinfo)
 {
   ERREXIT(cinfo, JERR_MODE_CHANGE);
@@ -817,7 +817,7 @@ new_color_map_1_quant (j_decompress_ptr cinfo)
  * Module initialization routine for 1-pass color quantization.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_1pass_quantizer (j_decompress_ptr cinfo)
 {
   my_cquantize_ptr cquantize;
diff --git a/code/jpeg-6/jquant2.c b/code/jpeg-6b/jquant2.c
index 2504398..af601e3 100644
--- a/code/jpeg-6/jquant2.c
+++ b/code/jpeg-6b/jquant2.c
@@ -1,7 +1,7 @@
 /*
  * jquant2.c
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -220,7 +220,7 @@ typedef my_cquantizer * my_cquantize_ptr;
  * NULL pointer).
  */
 
-METHODDEF void
+METHODDEF(void)
 prescan_quantize (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
 		  JSAMPARRAY output_buf, int num_rows)
 {
@@ -269,7 +269,7 @@ typedef struct {
 typedef box * boxptr;
 
 
-LOCAL boxptr
+LOCAL(boxptr)
 find_biggest_color_pop (boxptr boxlist, int numboxes)
 /* Find the splittable box with the largest color population */
 /* Returns NULL if no splittable boxes remain */
@@ -289,7 +289,7 @@ find_biggest_color_pop (boxptr boxlist, int numboxes)
 }
 
 
-LOCAL boxptr
+LOCAL(boxptr)
 find_biggest_volume (boxptr boxlist, int numboxes)
 /* Find the splittable box with the largest (scaled) volume */
 /* Returns NULL if no splittable boxes remain */
@@ -309,7 +309,7 @@ find_biggest_volume (boxptr boxlist, int numboxes)
 }
 
 
-LOCAL void
+LOCAL(void)
 update_box (j_decompress_ptr cinfo, boxptr boxp)
 /* Shrink the min/max bounds of a box to enclose only nonzero elements, */
 /* and recompute its volume and population */
@@ -420,7 +420,7 @@ update_box (j_decompress_ptr cinfo, boxptr boxp)
 }
 
 
-LOCAL int
+LOCAL(int)
 median_cut (j_decompress_ptr cinfo, boxptr boxlist, int numboxes,
 	    int desired_colors)
 /* Repeatedly select and split the largest box until we have enough boxes */
@@ -495,7 +495,7 @@ median_cut (j_decompress_ptr cinfo, boxptr boxlist, int numboxes,
 }
 
 
-LOCAL void
+LOCAL(void)
 compute_color (j_decompress_ptr cinfo, boxptr boxp, int icolor)
 /* Compute representative color for a box, put it in colormap[icolor] */
 {
@@ -535,7 +535,7 @@ compute_color (j_decompress_ptr cinfo, boxptr boxp, int icolor)
 }
 
 
-LOCAL void
+LOCAL(void)
 select_colors (j_decompress_ptr cinfo, int desired_colors)
 /* Master routine for color selection */
 {
@@ -642,7 +642,7 @@ select_colors (j_decompress_ptr cinfo, int desired_colors)
  * inner-loop variables.
  */
 
-LOCAL int
+LOCAL(int)
 find_nearby_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
 		    JSAMPLE colorlist[])
 /* Locate the colormap entries close enough to an update box to be candidates
@@ -771,7 +771,7 @@ find_nearby_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
 }
 
 
-LOCAL void
+LOCAL(void)
 find_best_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
 		  int numcolors, JSAMPLE colorlist[], JSAMPLE bestcolor[])
 /* Find the closest colormap entry for each cell in the update box,
@@ -851,7 +851,7 @@ find_best_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
 }
 
 
-LOCAL void
+LOCAL(void)
 fill_inverse_cmap (j_decompress_ptr cinfo, int c0, int c1, int c2)
 /* Fill the inverse-colormap entries in the update box that contains */
 /* histogram cell c0/c1/c2.  (Only that one cell MUST be filled, but */
@@ -911,7 +911,7 @@ fill_inverse_cmap (j_decompress_ptr cinfo, int c0, int c1, int c2)
  * Map some rows of pixels to the output colormapped representation.
  */
 
-METHODDEF void
+METHODDEF(void)
 pass2_no_dither (j_decompress_ptr cinfo,
 		 JSAMPARRAY input_buf, JSAMPARRAY output_buf, int num_rows)
 /* This version performs no dithering */
@@ -945,7 +945,7 @@ pass2_no_dither (j_decompress_ptr cinfo,
 }
 
 
-METHODDEF void
+METHODDEF(void)
 pass2_fs_dither (j_decompress_ptr cinfo,
 		 JSAMPARRAY input_buf, JSAMPARRAY output_buf, int num_rows)
 /* This version performs Floyd-Steinberg dithering */
@@ -1104,7 +1104,7 @@ pass2_fs_dither (j_decompress_ptr cinfo,
  * to Aaron Giles for this idea.
  */
 
-LOCAL void
+LOCAL(void)
 init_error_limit (j_decompress_ptr cinfo)
 /* Allocate and fill in the error_limiter table */
 {
@@ -1139,7 +1139,7 @@ init_error_limit (j_decompress_ptr cinfo)
  * Finish up at the end of each pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 finish_pass1 (j_decompress_ptr cinfo)
 {
   my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
@@ -1152,7 +1152,7 @@ finish_pass1 (j_decompress_ptr cinfo)
 }
 
 
-METHODDEF void
+METHODDEF(void)
 finish_pass2 (j_decompress_ptr cinfo)
 {
   /* no work */
@@ -1163,7 +1163,7 @@ finish_pass2 (j_decompress_ptr cinfo)
  * Initialize for each processing pass.
  */
 
-METHODDEF void
+METHODDEF(void)
 start_pass_2_quant (j_decompress_ptr cinfo, boolean is_pre_scan)
 {
   my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
@@ -1226,7 +1226,7 @@ start_pass_2_quant (j_decompress_ptr cinfo, boolean is_pre_scan)
  * Switch to a new external colormap between output passes.
  */
 
-METHODDEF void
+METHODDEF(void)
 new_color_map_2_quant (j_decompress_ptr cinfo)
 {
   my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
@@ -1240,7 +1240,7 @@ new_color_map_2_quant (j_decompress_ptr cinfo)
  * Module initialization routine for 2-pass color quantization.
  */
 
-GLOBAL void
+GLOBAL(void)
 jinit_2pass_quantizer (j_decompress_ptr cinfo)
 {
   my_cquantize_ptr cquantize;
diff --git a/code/jpeg-6/jutils.c b/code/jpeg-6b/jutils.c
index 4ba2a54..d18a955 100644
--- a/code/jpeg-6/jutils.c
+++ b/code/jpeg-6b/jutils.c
@@ -1,7 +1,7 @@
 /*
  * jutils.c
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1996, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -21,6 +21,8 @@
  * of a DCT block read in natural order (left to right, top to bottom).
  */
 
+#if 0				/* This table is not actually needed in v6a */
+
 const int jpeg_zigzag_order[DCTSIZE2] = {
    0,  1,  5,  6, 14, 15, 27, 28,
    2,  4,  7, 13, 16, 26, 29, 42,
@@ -32,6 +34,8 @@ const int jpeg_zigzag_order[DCTSIZE2] = {
   35, 36, 48, 49, 57, 58, 62, 63
 };
 
+#endif
+
 /*
  * jpeg_natural_order[i] is the natural-order position of the i'th element
  * of zigzag order.
@@ -64,7 +68,7 @@ const int jpeg_natural_order[DCTSIZE2+16] = {
  * Arithmetic utilities
  */
 
-GLOBAL long
+GLOBAL(long)
 jdiv_round_up (long a, long b)
 /* Compute a/b rounded up to next integer, ie, ceil(a/b) */
 /* Assumes a >= 0, b > 0 */
@@ -73,7 +77,7 @@ jdiv_round_up (long a, long b)
 }
 
 
-GLOBAL long
+GLOBAL(long)
 jround_up (long a, long b)
 /* Compute a rounded up to next multiple of b, ie, ceil(a/b)*b */
 /* Assumes a >= 0, b > 0 */
@@ -103,7 +107,7 @@ jround_up (long a, long b)
 #endif
 
 
-GLOBAL void
+GLOBAL(void)
 jcopy_sample_rows (JSAMPARRAY input_array, int source_row,
 		   JSAMPARRAY output_array, int dest_row,
 		   int num_rows, JDIMENSION num_cols)
@@ -137,7 +141,7 @@ jcopy_sample_rows (JSAMPARRAY input_array, int source_row,
 }
 
 
-GLOBAL void
+GLOBAL(void)
 jcopy_block_row (JBLOCKROW input_row, JBLOCKROW output_row,
 		 JDIMENSION num_blocks)
 /* Copy a row of coefficient blocks from one place to another. */
@@ -157,7 +161,7 @@ jcopy_block_row (JBLOCKROW input_row, JBLOCKROW output_row,
 }
 
 
-GLOBAL void
+GLOBAL(void)
 jzero_far (void FAR * target, size_t bytestozero)
 /* Zero out a chunk of FAR memory. */
 /* This might be sample-array data, block-array data, or alloc_large data. */
diff --git a/code/jpeg-6/jversion.h b/code/jpeg-6b/jversion.h
index f2f1b8d..6472c58 100644
--- a/code/jpeg-6/jversion.h
+++ b/code/jpeg-6b/jversion.h
@@ -1,7 +1,7 @@
 /*
  * jversion.h
  *
- * Copyright (C) 1991-1995, Thomas G. Lane.
+ * Copyright (C) 1991-1998, Thomas G. Lane.
  * This file is part of the Independent JPEG Group's software.
  * For conditions of distribution and use, see the accompanying README file.
  *
@@ -9,6 +9,6 @@
  */
 
 
-#define JVERSION	"6  2-Aug-95"
+#define JVERSION	"6b  27-Mar-1998"
 
-#define JCOPYRIGHT	"Copyright (C) 1995, Thomas G. Lane"
+#define JCOPYRIGHT	"Copyright (C) 1998, Thomas G. Lane"
diff --git a/code/renderer/tr_image_jpg.c b/code/renderer/tr_image_jpg.c
index 8a9bbc4..fb4f212 100644
--- a/code/renderer/tr_image_jpg.c
+++ b/code/renderer/tr_image_jpg.c
@@ -31,7 +31,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
 #define JPEG_INTERNALS
-#include "../jpeg-6/jpeglib.h"
+#include "../jpeg-6b/jpeglib.h"
 
 void R_LoadJPG( const char *filename, unsigned char **pic, int *width, int *height ) {
   /* This struct contains the JPEG decompression parameters and pointers to