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148 lines
3.5 KiB
C
148 lines
3.5 KiB
C
/***********************************************************
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Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The
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Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Parser generator main program */
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/* This expects a filename containing the grammar as argv[1] (UNIX)
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or asks the console for such a file name (THINK C).
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It writes its output on two files in the current directory:
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- "graminit.c" gets the grammar as a bunch of initialized data
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- "graminit.h" gets the grammar's non-terminals as #defines.
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Error messages and status info during the generation process are
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written to stdout, or sometimes to stderr. */
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#include "pgenheaders.h"
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#include "grammar.h"
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#include "node.h"
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#include "parsetok.h"
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#include "pgen.h"
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int debugging;
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/* Forward */
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grammar *getgrammar PROTO((char *filename));
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#ifdef macintosh
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int main PROTO((int, char **));
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char *askfile PROTO((void));
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#endif
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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grammar *g;
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node *n;
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FILE *fp;
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char *filename;
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#ifdef macintosh
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filename = askfile();
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#else
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if (argc != 2) {
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fprintf(stderr, "usage: %s grammar\n", argv[0]);
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exit(2);
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}
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filename = argv[1];
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#endif
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g = getgrammar(filename);
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fp = fopen("graminit.c", "w");
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if (fp == NULL) {
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perror("graminit.c");
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exit(1);
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}
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printf("Writing graminit.c ...\n");
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printgrammar(g, fp);
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fclose(fp);
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fp = fopen("graminit.h", "w");
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if (fp == NULL) {
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perror("graminit.h");
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exit(1);
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}
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printf("Writing graminit.h ...\n");
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printnonterminals(g, fp);
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fclose(fp);
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exit(0);
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}
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grammar *
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getgrammar(filename)
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char *filename;
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{
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FILE *fp;
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node *n;
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grammar *g0, *g;
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fp = fopen(filename, "r");
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if (fp == NULL) {
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perror(filename);
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exit(1);
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}
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g0 = meta_grammar();
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n = NULL;
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parsefile(fp, filename, g0, g0->g_start, (char *)NULL, (char *)NULL, &n);
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fclose(fp);
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if (n == NULL) {
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fprintf(stderr, "Parsing error.\n");
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exit(1);
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}
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g = pgen(n);
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if (g == NULL) {
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printf("Bad grammar.\n");
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exit(1);
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}
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return g;
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}
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#ifdef macintosh
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char *
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askfile()
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{
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char buf[256];
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static char name[256];
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printf("Input file name: ");
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if (fgets(buf, sizeof buf, stdin) == NULL) {
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printf("EOF\n");
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exit(1);
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}
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/* XXX The (unsigned char *) case is needed by THINK C 3.0 */
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if (sscanf(/*(unsigned char *)*/buf, " %s ", name) != 1) {
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printf("No file\n");
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exit(1);
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}
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return name;
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}
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#endif
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void
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fatal(msg)
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char *msg;
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{
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fprintf(stderr, "pgen: FATAL ERROR: %s\n", msg);
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exit(1);
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}
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/* XXX TO DO:
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- check for duplicate definitions of names (instead of fatal err)
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*/
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