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- #include <signal.h>
- #include "defs.h"
-
- char dflag;
- char lflag;
- char rflag;
- char tflag;
- char vflag;
-
- char *file_prefix = "y";
- char *myname = "yacc";
- #ifdef MSDOS
- char *temp_form = "yaccXXXXXXX";
- #else
- char *temp_form = "yacc.XXXXXXX";
- #endif
-
-
- int lineno;
- int outline;
-
- char *action_file_name;
- char *defines_file_name;
- char *input_file_name = "";
- char *output_file_name;
- char *code_file_name;
- char *text_file_name;
- char *union_file_name;
- char *verbose_file_name;
-
- FILE *action_file; /* a temp file, used to save actions associated */
- /* with rules until the parser is written */
- FILE *defines_file; /* y.tab.h */
- FILE *input_file; /* the input file */
- FILE *output_file; /* y.tab.c */
- FILE *code_file; /* y.code.c (used when the -r option is specified) */
- FILE *text_file; /* a temp file, used to save text until all */
- /* symbols have been defined */
- FILE *union_file; /* a temp file, used to save the union */
- /* definition until all symbol have been */
- /* defined */
- FILE *verbose_file; /* y.output */
-
- int nitems;
- int nrules;
- int nsyms;
- int ntokens;
- int nvars;
-
- int start_symbol;
- char **symbol_name;
- short *symbol_value;
- short *symbol_prec;
- char *symbol_assoc;
-
- short *ritem;
- short *rlhs;
- short *rrhs;
- short *rprec;
- char *rassoc;
- short **derives;
- char *nullable;
-
- extern char *mktemp();
- extern char *getenv();
-
-
- done(k)
- int k;
- {
- if (action_file) { fclose(action_file); unlink(action_file_name); }
- if (text_file) { fclose(text_file); unlink(text_file_name); }
- if (union_file) { fclose(union_file); unlink(union_file_name); }
- exit(k);
- }
-
-
- void onintr() /* last revision deletes the "void" */
- {
- done(1);
- }
-
-
- set_signals()
- {
- #ifdef SIGINT
- if (signal(SIGINT, SIG_IGN) != SIG_IGN)
- signal(SIGINT, onintr);
- #endif
- #ifdef SIGTERM
- if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
- signal(SIGTERM, onintr);
- #endif
- #ifdef SIGHUP
- if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
- signal(SIGHUP, onintr);
- #endif
- }
-
-
- usage()
- {
- fprintf(stderr, "Yacc (Berkeley) 09/09/90\n");
- fprintf(stderr, "Usage: %s [-dlrtv] [-b file_prefix] filename\n\n", myname);
- fprintf(stderr, "\t-b file_prefix change the default file prefix \"y.\"\n");
- fprintf(stderr, "\t-d\t\twrite the header file \"y.tab.h\"\n");
- fprintf(stderr, "\t-l\t\texclude the #line directives in files\n");
- fprintf(stderr, "\t-r\t\tseperate code and tables into \"y.code.c\" and \"y.tab.c\"\n");
- fprintf(stderr, "\t-t\t\tinclude the debugging code in files\n");
- fprintf(stderr, "\t-v\t\twrite the parser description file \"y.output\"\n");
- exit(1);
- }
-
-
- getargs(argc, argv)
- int argc;
- char *argv[];
- {
- register int i;
- register char *s;
-
- if (argc > 0) myname = argv[0];
- for (i = 1; i < argc; ++i)
- {
- s = argv[i];
- if (*s != '-') break;
- switch (*++s)
- {
- case '\0':
- input_file = stdin;
- if (i + 1 < argc) usage();
- return;
-
- case '-':
- ++i;
- goto no_more_options;
-
- case 'b':
- if (*++s)
- file_prefix = s;
- else if (++i < argc)
- file_prefix = argv[i];
- else
- usage();
- continue;
-
- case 'd':
- dflag = 1;
- break;
-
- case 'l':
- lflag = 1;
- break;
-
- case 'r':
- rflag = 1;
- break;
-
- case 't':
- tflag = 1;
- break;
-
- case 'v':
- vflag = 1;
- break;
-
- default:
- usage();
- }
-
- for (;;)
- {
- switch (*++s)
- {
- case '\0':
- goto end_of_option;
-
- case 'd':
- dflag = 1;
- break;
-
- case 'l':
- lflag = 1;
- break;
-
- case 'r':
- rflag = 1;
- break;
-
- case 't':
- tflag = 1;
- break;
-
- case 'v':
- vflag = 1;
- break;
-
- default:
- usage();
- }
- }
- end_of_option:;
- }
-
- no_more_options:;
- if (i + 1 != argc) usage();
- input_file_name = argv[i];
- }
-
-
- char *
- allocate(n)
- unsigned n;
- {
- register char *p;
-
- p = NULL;
- if (n)
- {
- p = CALLOC(1, n);
- if (!p) no_space();
- }
- return (p);
- }
-
-
- create_file_names()
- {
- int i, len;
- char *tmpdir;
-
- #ifdef MSDOS
- (tmpdir = getenv("TMPDIR")) ||
- (tmpdir = getenv("TMP")) ||
- (tmpdir = ".");
- #else
- tmpdir = getenv("TMPDIR");
- if (tmpdir == 0) tmpdir = "/tmp";
- #endif
-
- len = strlen(tmpdir);
- i = len + 13;
- if (len && tmpdir[len-1] != '/')
- ++i;
-
- action_file_name = MALLOC(i);
- if (action_file_name == 0) no_space();
- text_file_name = MALLOC(i);
- if (text_file_name == 0) no_space();
- union_file_name = MALLOC(i);
- if (union_file_name == 0) no_space();
-
- strcpy(action_file_name, tmpdir);
- strcpy(text_file_name, tmpdir);
- strcpy(union_file_name, tmpdir);
-
- if (len && tmpdir[len - 1] != '/')
- {
- action_file_name[len] = '/';
- text_file_name[len] = '/';
- union_file_name[len] = '/';
- ++len;
- }
-
- strcpy(action_file_name + len, temp_form);
- strcpy(text_file_name + len, temp_form);
- strcpy(union_file_name + len, temp_form);
-
- action_file_name[len + 5] = 'a';
- text_file_name[len + 5] = 't';
- union_file_name[len + 5] = 'u';
-
- mktemp(action_file_name);
- mktemp(text_file_name);
- mktemp(union_file_name);
-
- len = strlen(file_prefix);
-
- output_file_name = MALLOC(len + 7);
- if (output_file_name == 0)
- no_space();
- strcpy(output_file_name, file_prefix);
- strcpy(output_file_name + len, OUTPUT_SUFFIX);
-
- if (rflag)
- {
- code_file_name = MALLOC(len + 8);
- if (code_file_name == 0)
- no_space();
- strcpy(code_file_name, file_prefix);
- strcpy(code_file_name + len, CODE_SUFFIX);
- }
- else
- code_file_name = output_file_name;
-
- if (dflag)
- {
- /* the number 7 below is the size of ".tab.h"; sizeof is not used */
- /* because of a C compiler that thinks sizeof(".tab.h") == 6 */
- defines_file_name = MALLOC(len + 7);
- if (defines_file_name == 0)
- no_space();
- strcpy(defines_file_name, file_prefix);
- strcpy(defines_file_name + len, DEFINES_SUFFIX);
- }
-
- if (vflag)
- {
- verbose_file_name = MALLOC(len + 8);
- if (verbose_file_name == 0)
- no_space();
- strcpy(verbose_file_name, file_prefix);
- strcpy(verbose_file_name + len, VERBOSE_SUFFIX);
- }
- }
-
-
- open_files()
- {
- create_file_names();
-
- if (input_file == 0)
- {
- input_file = fopen(input_file_name, "r");
- if (input_file == 0)
- open_error(input_file_name);
- }
-
- action_file = fopen(action_file_name, "w");
- if (action_file == 0) open_error(action_file_name);
-
- text_file = fopen(text_file_name, "w");
- if (text_file == 0) open_error(text_file_name);
-
- if (vflag)
- {
- verbose_file = fopen(verbose_file_name, "w");
- if (verbose_file == 0) open_error(verbose_file_name);
- }
-
- if (dflag)
- {
- defines_file = fopen(defines_file_name, "w");
- if (defines_file == 0) open_error(defines_file_name);
- union_file = fopen(union_file_name, "w");
- if (union_file == 0) open_error(union_file_name);
- }
-
- output_file = fopen(output_file_name, "w");
- if (output_file == 0) open_error(output_file_name);
-
- if (rflag)
- {
- code_file = fopen(code_file_name, "w");
- if (code_file == 0)
- open_error(code_file_name);
- }
- else
- code_file = output_file;
- }
-
-
- int
- main(argc, argv)
- int argc;
- char *argv[];
- {
- set_signals();
- getargs(argc, argv);
- open_files();
- reader();
- lr0();
- lalr();
- make_parser();
- verbose();
- output();
- done(0);
- /*NOTREACHED*/
- }
-