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Diffstat (limited to 'scmmain.c')
| -rw-r--r-- | scmmain.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/scmmain.c b/scmmain.c new file mode 100644 index 0000000..3f920dd --- /dev/null +++ b/scmmain.c @@ -0,0 +1,145 @@ +/* Copyright (C) 1990-1999 Free Software Foundation, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this software; see the file COPYING. If not, write to + * the Free Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111, USA. + * + * As a special exception, the Free Software Foundation gives permission + * for additional uses of the text contained in its release of GUILE. + * + * The exception is that, if you link the GUILE library with other files + * to produce an executable, this does not by itself cause the + * resulting executable to be covered by the GNU General Public License. + * Your use of that executable is in no way restricted on account of + * linking the GUILE library code into it. + * + * This exception does not however invalidate any other reasons why + * the executable file might be covered by the GNU General Public License. + * + * This exception applies only to the code released by the + * Free Software Foundation under the name GUILE. If you copy + * code from other Free Software Foundation releases into a copy of + * GUILE, as the General Public License permits, the exception does + * not apply to the code that you add in this way. To avoid misleading + * anyone as to the status of such modified files, you must delete + * this exception notice from them. + * + * If you write modifications of your own for GUILE, it is your choice + * whether to permit this exception to apply to your modifications. + * If you do not wish that, delete this exception notice. + */ + +/* "scmmain.c" main() for SCM. + Author: Aubrey Jaffer */ + +#include "scm.h" +#include "patchlvl.h" + +#ifndef GENERIC_NAME +# define GENERIC_NAME "scm" +#endif +#ifndef INIT_GETENV +# define INIT_GETENV "SCM_INIT_PATH" +#endif + +char *scm_find_implpath(execpath) + char *execpath; +{ + char *implpath = 0; +#ifndef nosve + char *getenvpath = getenv(INIT_GETENV); + /* fprintf(stderr, "%s=%s\n", INIT_GETENV, getenvpath); fflush(stderr); */ + if (getenvpath) implpath = scm_cat_path(0L, getenvpath, 0L); + if (implpath) {/* The value of the environment variable supersedes + other locations, only if the file exists. */ + implpath = scm_try_path(implpath); + if (!implpath) { + fputs("Value of "INIT_GETENV" (=\"", stderr); + fputs(getenvpath, stderr); + fputs("\") not found; Trying elsewhere\n", stderr); + } + } +#endif + if (!implpath && execpath) + implpath = find_impl_file(execpath, GENERIC_NAME, INIT_FILE_NAME, dirsep); +#ifdef IMPLINIT + if (!implpath) implpath = scm_cat_path(0L, IMPLINIT, 0L); +#endif + return implpath; +} +char *generic_name[] = { GENERIC_NAME }; + +int main(argc, argv) + int argc; + char **argv; +{ + char *script_arg = 0; /* location of SCSH style script file or 0. */ + char *implpath = 0, **nargv; + int nargc, iverbose = 0, buf0stdin; + int freeall = 1; /* Free storage when we're done. */ + SCM retval; + +/* {char ** argvv = argv; */ +/* for (;*argvv;argvv++) {fputs(*argvv,stderr); fputs(" ",stderr);} */ +/* fputs("\n",stderr);} */ + + if (0==argc) {argc = 1; argv = generic_name;} /* for macintosh */ +#ifndef LACK_SBRK + init_sbrk(); /* Do this before malloc()s. */ +#endif + execpath = 0; /* even when dumped */ + if ((nargv = script_process_argv(argc, argv))) { /* SCSH style scripts */ + script_arg = argv[2]; /* Save for scm_find_execpath() call */ + nargc = script_count_argv(nargv); + } + else {nargv = argv; nargc = argc;} + /* execpath must be set to executable's path in order to use DUMP or DLD. */ + execpath = scm_find_execpath(nargc, nargv, script_arg); + implpath = scm_find_implpath(execpath); + if (isatty(fileno(stdin)) && isatty(fileno(stdout))) + iverbose = (nargc <= 1) ? 2 : 1; + buf0stdin = init_buf0(stdin); + do { /* You must call scm_init_from_argv() + or init_scm() to initialize SCM */ + scm_init_from_argv(nargc, nargv, script_arg, iverbose, buf0stdin); + init_signals(); /* signals are optional */ + /* Now we are ready to run Scheme code! */ + retval = scm_top_level(implpath, 0L); + restore_signals(); /* signals are optional */ + /* final_scm() when you are done with SCM. */ + if (retval) break; + dumped = 0; + if (2 <= iverbose) fputs(";RESTART\n", stderr); + final_scm(!0); + } while (!0); + final_scm( +#ifdef CAREFUL_INTS + 1 +#else + freeall || (2 <= verbose) +#endif + ); + if (2 <= iverbose) fputs(";EXIT\n", stderr); + fflush(stderr); + if (implpath) free(implpath); + if (execpath) free(execpath); + execpath = 0; + return (int)INUM(retval); +} + +/* init_user_scm() is called by the scheme procedure + SCM_INIT_EXTENSIONS in "Init5xx.scm" */ +void init_user_scm() +{ + /* Put calls to your C initialization routines here. */ +} |