367 lines
6.3 KiB
C
367 lines
6.3 KiB
C
#include <signal.h>
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#include "defs.h"
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char dflag;
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char lflag;
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char rflag;
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char tflag;
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char vflag;
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char *file_prefix = "y";
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char *myname = "yacc";
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char *temp_form = "yacc.XXXXXXX";
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int lineno;
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int outline;
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char *action_file_name;
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char *code_file_name;
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char *defines_file_name;
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char *input_file_name = "";
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char *output_file_name;
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char *text_file_name;
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char *union_file_name;
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char *verbose_file_name;
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FILE *action_file; /* a temp file, used to save actions associated */
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/* with rules until the parser is written */
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FILE *code_file; /* y.code.c (used when the -r option is specified) */
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FILE *defines_file; /* y.tab.h */
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FILE *input_file; /* the input file */
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FILE *output_file; /* y.tab.c */
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FILE *text_file; /* a temp file, used to save text until all */
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/* symbols have been defined */
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FILE *union_file; /* a temp file, used to save the union */
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/* definition until all symbol have been */
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/* defined */
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FILE *verbose_file; /* y.output */
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int nitems;
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int nrules;
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int nsyms;
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int ntokens;
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int nvars;
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int start_symbol;
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char **symbol_name;
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short *symbol_value;
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short *symbol_prec;
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char *symbol_assoc;
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short *ritem;
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short *rlhs;
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short *rrhs;
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short *rprec;
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char *rassoc;
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short **derives;
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char *nullable;
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extern char *mktemp();
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extern char *getenv();
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done(k)
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int k;
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{
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if (action_file) { fclose(action_file); unlink(action_file_name); }
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if (text_file) { fclose(text_file); unlink(text_file_name); }
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if (union_file) { fclose(union_file); unlink(union_file_name); }
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exit(k);
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}
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void
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onintr()
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{
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done(1);
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}
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set_signals()
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{
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#ifdef SIGINT
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if (signal(SIGINT, SIG_IGN) != SIG_IGN)
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signal(SIGINT, onintr);
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#endif
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#ifdef SIGTERM
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if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
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signal(SIGTERM, onintr);
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#endif
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#ifdef SIGHUP
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if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
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signal(SIGHUP, onintr);
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#endif
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}
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usage()
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{
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fprintf(stderr, "usage: %s [-dlrtv] [-b file_prefix] filename\n", myname);
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exit(1);
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}
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getargs(argc, argv)
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int argc;
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char *argv[];
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{
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register int i;
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register char *s;
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if (argc > 0) myname = argv[0];
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for (i = 1; i < argc; ++i)
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{
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s = argv[i];
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if (*s != '-') break;
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switch (*++s)
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{
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case '\0':
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input_file = stdin;
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if (i + 1 < argc) usage();
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return;
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case '-':
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++i;
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goto no_more_options;
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case 'b':
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if (*++s)
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file_prefix = s;
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else if (++i < argc)
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file_prefix = argv[i];
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else
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usage();
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continue;
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case 'd':
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dflag = 1;
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break;
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case 'l':
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lflag = 1;
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break;
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case 'r':
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rflag = 1;
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break;
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case 't':
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tflag = 1;
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break;
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case 'v':
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vflag = 1;
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break;
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default:
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usage();
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}
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for (;;)
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{
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switch (*++s)
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{
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case '\0':
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goto end_of_option;
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case 'd':
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dflag = 1;
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break;
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case 'l':
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lflag = 1;
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break;
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case 'r':
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rflag = 1;
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break;
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case 't':
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tflag = 1;
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break;
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case 'v':
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vflag = 1;
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break;
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default:
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usage();
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}
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}
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end_of_option:;
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}
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no_more_options:;
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if (i + 1 != argc) usage();
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input_file_name = argv[i];
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}
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char *
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allocate(n)
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unsigned n;
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{
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register char *p;
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p = NULL;
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if (n)
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{
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p = CALLOC(1, n);
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if (!p) no_space();
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}
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return (p);
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}
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create_file_names()
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{
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int i, len;
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char *tmpdir;
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tmpdir = getenv("TMPDIR");
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if (tmpdir == 0) tmpdir = "/tmp";
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len = strlen(tmpdir);
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i = len + 13;
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if (len && tmpdir[len-1] != '/')
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++i;
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action_file_name = MALLOC(i);
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if (action_file_name == 0) no_space();
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text_file_name = MALLOC(i);
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if (text_file_name == 0) no_space();
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union_file_name = MALLOC(i);
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if (union_file_name == 0) no_space();
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strcpy(action_file_name, tmpdir);
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strcpy(text_file_name, tmpdir);
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strcpy(union_file_name, tmpdir);
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if (len && tmpdir[len - 1] != '/')
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{
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action_file_name[len] = '/';
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text_file_name[len] = '/';
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union_file_name[len] = '/';
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++len;
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}
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strcpy(action_file_name + len, temp_form);
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strcpy(text_file_name + len, temp_form);
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strcpy(union_file_name + len, temp_form);
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action_file_name[len + 5] = 'a';
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text_file_name[len + 5] = 't';
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union_file_name[len + 5] = 'u';
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mktemp(action_file_name);
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mktemp(text_file_name);
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mktemp(union_file_name);
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len = strlen(file_prefix);
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output_file_name = MALLOC(len + 7);
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if (output_file_name == 0)
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no_space();
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strcpy(output_file_name, file_prefix);
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strcpy(output_file_name + len, OUTPUT_SUFFIX);
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if (rflag)
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{
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code_file_name = MALLOC(len + 8);
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if (code_file_name == 0)
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no_space();
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strcpy(code_file_name, file_prefix);
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strcpy(code_file_name + len, CODE_SUFFIX);
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}
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else
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code_file_name = output_file_name;
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if (dflag)
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{
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defines_file_name = MALLOC(len + 7);
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if (defines_file_name == 0)
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no_space();
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strcpy(defines_file_name, file_prefix);
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strcpy(defines_file_name + len, DEFINES_SUFFIX);
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}
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if (vflag)
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{
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verbose_file_name = MALLOC(len + 8);
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if (verbose_file_name == 0)
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no_space();
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strcpy(verbose_file_name, file_prefix);
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strcpy(verbose_file_name + len, VERBOSE_SUFFIX);
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}
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}
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open_files()
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{
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create_file_names();
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if (input_file == 0)
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{
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input_file = fopen(input_file_name, "r");
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if (input_file == 0)
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open_error(input_file_name);
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}
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action_file = fopen(action_file_name, "w");
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if (action_file == 0)
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open_error(action_file_name);
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text_file = fopen(text_file_name, "w");
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if (text_file == 0)
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open_error(text_file_name);
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if (vflag)
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{
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verbose_file = fopen(verbose_file_name, "w");
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if (verbose_file == 0)
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open_error(verbose_file_name);
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}
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if (dflag)
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{
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defines_file = fopen(defines_file_name, "w");
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if (defines_file == 0)
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open_error(defines_file_name);
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union_file = fopen(union_file_name, "w");
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if (union_file == 0)
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open_error(union_file_name);
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}
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output_file = fopen(output_file_name, "w");
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if (output_file == 0)
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open_error(output_file_name);
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if (rflag)
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{
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code_file = fopen(code_file_name, "w");
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if (code_file == 0)
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open_error(code_file_name);
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}
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else
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code_file = output_file;
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}
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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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set_signals();
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getargs(argc, argv);
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open_files();
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reader();
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lr0();
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lalr();
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make_parser();
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verbose();
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output();
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done(0);
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/*NOTREACHED*/
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}
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