From e6d6a71599419908afd39c704ccda0cf5e475dea Mon Sep 17 00:00:00 2001
From: tma <tma@edf5b092-35ff-0310-97b2-ce42778d08ea>
Date: Wed, 16 Nov 2005 20:23:37 +0000
Subject: * Partial implementation of FS_Seek for files in pk3s * A couple of
 RIFF decoder tweaks/fixes

git-svn-id: svn://svn.icculus.org/quake3/trunk@363 edf5b092-35ff-0310-97b2-ce42778d08ea
---
 code/qcommon/files.c | 44 ++++++++++++++++++++++++++++++++------------
 1 file changed, 32 insertions(+), 12 deletions(-)

(limited to 'code/qcommon/files.c')

diff --git a/code/qcommon/files.c b/code/qcommon/files.c
index ecdc885..9baadb7 100644
--- a/code/qcommon/files.c
+++ b/code/qcommon/files.c
@@ -1361,6 +1361,8 @@ void QDECL FS_Printf( fileHandle_t h, const char *fmt, ... ) {
 	FS_Write(msg, strlen(msg), h);
 }
 
+#define PK3_SEEK_BUFFER_SIZE 65536
+
 /*
 =================
 FS_Seek
@@ -1369,7 +1371,6 @@ FS_Seek
 */
 int FS_Seek( fileHandle_t f, long offset, int origin ) {
 	int		_origin;
-	char	foo[65536];
 
 	if ( !fs_searchpaths ) {
 		Com_Error( ERR_FATAL, "Filesystem call made without initialization\n" );
@@ -1383,19 +1384,38 @@ int FS_Seek( fileHandle_t f, long offset, int origin ) {
 	}
 
 	if (fsh[f].zipFile == qtrue) {
-		if (offset == 0 && origin == FS_SEEK_SET) {
-			// set the file position in the zip file (also sets the current file info)
-			unzSetCurrentFileInfoPosition(fsh[f].handleFiles.file.z, fsh[f].zipFilePos);
-			return unzOpenCurrentFile(fsh[f].handleFiles.file.z);
-		} else if (offset<65536) {
-			// set the file position in the zip file (also sets the current file info)
-			unzSetCurrentFileInfoPosition(fsh[f].handleFiles.file.z, fsh[f].zipFilePos);
-			unzOpenCurrentFile(fsh[f].handleFiles.file.z);
-			return FS_Read(foo, offset, f);
-		} else {
-			Com_Error( ERR_FATAL, "ZIP FILE FSEEK NOT YET IMPLEMENTED\n" );
+    //FIXME: this is incomplete and really, really
+    //crappy (but better than what was here before)
+		byte	buffer[PK3_SEEK_BUFFER_SIZE];
+		int		remainder = offset;
+
+		Com_Printf( S_COLOR_YELLOW "%s %d %d\n", fsh[f].name, offset, origin );
+		if( offset < 0 || origin == FS_SEEK_END ) {
+			Com_Error( ERR_FATAL, "Negative offsets and FS_SEEK_END not implemented "
+					"for FS_Seek on pk3 file contents\n" );
 			return -1;
 		}
+
+		switch( origin ) {
+			case FS_SEEK_SET:
+				unzSetCurrentFileInfoPosition(fsh[f].handleFiles.file.z, fsh[f].zipFilePos);
+				unzOpenCurrentFile(fsh[f].handleFiles.file.z);
+				//fallthrough
+
+			case FS_SEEK_CUR:
+				while( remainder > PK3_SEEK_BUFFER_SIZE ) {
+					FS_Read( buffer, PK3_SEEK_BUFFER_SIZE, f );
+					remainder -= PK3_SEEK_BUFFER_SIZE;
+				}
+				FS_Read( buffer, remainder, f );
+				return offset;
+				break;
+
+			default:
+				Com_Error( ERR_FATAL, "Bad origin in FS_Seek\n" );
+				return -1;
+				break;
+		}
 	} else {
 		FILE *file;
 		file = FS_FileForHandle(f);
-- 
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