[9] | 1 | #include <sys/types.h>
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| 2 | #include <signal.h>
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| 3 | #include "defs.h"
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| 4 |
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| 5 | char dflag;
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| 6 | char lflag;
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| 7 | char rflag;
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| 8 | char tflag;
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| 9 | char vflag;
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| 10 |
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| 11 | char *symbol_prefix;
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| 12 | char *file_prefix = "y";
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| 13 | char *myname = "yacc";
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| 14 | char *temp_form = "yacc.XXXXXXX";
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| 15 |
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| 16 | int lineno;
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| 17 | int outline;
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| 18 |
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| 19 | char *action_file_name;
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| 20 | char *code_file_name;
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| 21 | char *defines_file_name;
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| 22 | char *input_file_name = "";
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| 23 | char *output_file_name;
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| 24 | char *text_file_name;
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| 25 | char *union_file_name;
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| 26 | char *verbose_file_name;
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| 27 |
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| 28 | FILE *action_file; /* a temp file, used to save actions associated */
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| 29 | /* with rules until the parser is written */
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| 30 | FILE *code_file; /* y.code.c (used when the -r option is specified) */
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| 31 | FILE *defines_file; /* y.tab.h */
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| 32 | FILE *input_file; /* the input file */
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| 33 | FILE *output_file; /* y.tab.c */
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| 34 | FILE *text_file; /* a temp file, used to save text until all */
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| 35 | /* symbols have been defined */
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| 36 | FILE *union_file; /* a temp file, used to save the union */
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| 37 | /* definition until all symbol have been */
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| 38 | /* defined */
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| 39 | FILE *verbose_file; /* y.output */
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| 40 |
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| 41 | int nitems;
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| 42 | int nrules;
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| 43 | int nsyms;
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| 44 | int ntokens;
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| 45 | int nvars;
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| 46 |
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| 47 | int start_symbol;
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| 48 | char **symbol_name;
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| 49 | short *symbol_value;
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| 50 | short *symbol_prec;
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| 51 | char *symbol_assoc;
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| 52 |
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| 53 | short *ritem;
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| 54 | short *rlhs;
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| 55 | short *rrhs;
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| 56 | short *rprec;
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| 57 | char *rassoc;
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| 58 | short **derives;
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| 59 | char *nullable;
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| 60 |
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| 61 | extern char *mktemp();
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| 62 | extern char *getenv();
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| 63 |
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| 64 |
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| 65 | done(k)
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| 66 | int k;
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| 67 | {
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| 68 | if (action_file) { fclose(action_file); unlink(action_file_name); }
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| 69 | if (text_file) { fclose(text_file); unlink(text_file_name); }
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| 70 | if (union_file) { fclose(union_file); unlink(union_file_name); }
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| 71 | exit(k);
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| 72 | }
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| 73 |
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| 74 |
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| 75 | void
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| 76 | onintr(signo)
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| 77 | int signo;
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| 78 | {
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| 79 | done(1);
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| 80 | }
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| 81 |
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| 82 |
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| 83 | set_signals()
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| 84 | {
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| 85 | #ifdef SIGINT
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| 86 | if (signal(SIGINT, SIG_IGN) != SIG_IGN)
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| 87 | signal(SIGINT, onintr);
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| 88 | #endif
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| 89 | #ifdef SIGTERM
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| 90 | if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
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| 91 | signal(SIGTERM, onintr);
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| 92 | #endif
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| 93 | #ifdef SIGHUP
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| 94 | if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
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| 95 | signal(SIGHUP, onintr);
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| 96 | #endif
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| 97 | }
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| 98 |
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| 99 |
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| 100 | usage()
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| 101 | {
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| 102 | fprintf(stderr, "usage: %s [-dlrtv] [-b file_prefix] [-p symbol_prefix] filename\n", myname);
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| 103 | exit(1);
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| 104 | }
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| 105 |
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| 106 |
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| 107 | getargs(argc, argv)
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| 108 | int argc;
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| 109 | char *argv[];
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| 110 | {
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| 111 | register int i;
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| 112 | register char *s;
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| 113 |
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| 114 | if (argc > 0) myname = argv[0];
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| 115 | for (i = 1; i < argc; ++i)
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| 116 | {
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| 117 | s = argv[i];
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| 118 | if (*s != '-') break;
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| 119 | switch (*++s)
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| 120 | {
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| 121 | case '\0':
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| 122 | input_file = stdin;
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| 123 | if (i + 1 < argc) usage();
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| 124 | return;
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| 125 |
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| 126 | case '-':
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| 127 | ++i;
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| 128 | goto no_more_options;
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| 129 |
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| 130 | case 'b':
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| 131 | if (*++s)
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| 132 | file_prefix = s;
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| 133 | else if (++i < argc)
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| 134 | file_prefix = argv[i];
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| 135 | else
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| 136 | usage();
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| 137 | continue;
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| 138 |
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| 139 | case 'd':
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| 140 | dflag = 1;
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| 141 | break;
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| 142 |
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| 143 | case 'l':
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| 144 | lflag = 1;
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| 145 | break;
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| 146 |
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| 147 | case 'p':
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| 148 | if (*++s)
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| 149 | symbol_prefix = s;
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| 150 | else if (++i < argc)
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| 151 | symbol_prefix = argv[i];
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| 152 | else
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| 153 | usage();
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| 154 | continue;
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| 155 |
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| 156 | case 'r':
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| 157 | rflag = 1;
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| 158 | break;
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| 159 |
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| 160 | case 't':
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| 161 | tflag = 1;
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| 162 | break;
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| 163 |
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| 164 | case 'v':
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| 165 | vflag = 1;
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| 166 | break;
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| 167 |
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| 168 | default:
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| 169 | usage();
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| 170 | }
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| 171 |
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| 172 | for (;;)
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| 173 | {
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| 174 | switch (*++s)
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| 175 | {
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| 176 | case '\0':
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| 177 | goto end_of_option;
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| 178 |
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| 179 | case 'd':
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| 180 | dflag = 1;
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| 181 | break;
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| 182 |
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| 183 | case 'l':
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| 184 | lflag = 1;
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| 185 | break;
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| 186 |
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| 187 | case 'r':
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| 188 | rflag = 1;
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| 189 | break;
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| 190 |
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| 191 | case 't':
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| 192 | tflag = 1;
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| 193 | break;
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| 194 |
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| 195 | case 'v':
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| 196 | vflag = 1;
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| 197 | break;
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| 198 |
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| 199 | default:
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| 200 | usage();
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| 201 | }
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| 202 | }
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| 203 | end_of_option:;
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| 204 | }
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| 205 |
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| 206 | no_more_options:;
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| 207 | if (i + 1 != argc) usage();
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| 208 | input_file_name = argv[i];
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| 209 | }
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| 210 |
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| 211 |
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| 212 | char *
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| 213 | allocate(n)
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| 214 | unsigned n;
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| 215 | {
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| 216 | register char *p;
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| 217 |
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| 218 | p = NULL;
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| 219 | if (n)
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| 220 | {
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| 221 | p = CALLOC(1, n);
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| 222 | if (!p) no_space();
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| 223 | }
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| 224 | return (p);
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| 225 | }
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| 226 |
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| 227 |
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| 228 | create_file_names()
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| 229 | {
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| 230 | int i, len;
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| 231 | char *tmpdir;
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| 232 |
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| 233 | tmpdir = getenv("TMPDIR");
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| 234 | if (tmpdir == 0) tmpdir = "/tmp";
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| 235 |
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| 236 | len = strlen(tmpdir);
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| 237 | i = len + 13;
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| 238 | if (len && tmpdir[len-1] != '/')
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| 239 | ++i;
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| 240 |
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| 241 | action_file_name = MALLOC(i);
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| 242 | if (action_file_name == 0) no_space();
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| 243 | text_file_name = MALLOC(i);
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| 244 | if (text_file_name == 0) no_space();
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| 245 | union_file_name = MALLOC(i);
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| 246 | if (union_file_name == 0) no_space();
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| 247 |
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| 248 | strcpy(action_file_name, tmpdir);
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| 249 | strcpy(text_file_name, tmpdir);
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| 250 | strcpy(union_file_name, tmpdir);
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| 251 |
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| 252 | if (len && tmpdir[len - 1] != '/')
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| 253 | {
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| 254 | action_file_name[len] = '/';
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| 255 | text_file_name[len] = '/';
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| 256 | union_file_name[len] = '/';
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| 257 | ++len;
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| 258 | }
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| 259 |
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| 260 | strcpy(action_file_name + len, temp_form);
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| 261 | strcpy(text_file_name + len, temp_form);
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| 262 | strcpy(union_file_name + len, temp_form);
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| 263 |
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| 264 | action_file_name[len + 5] = 'a';
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| 265 | text_file_name[len + 5] = 't';
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| 266 | union_file_name[len + 5] = 'u';
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| 267 |
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| 268 | mktemp(action_file_name);
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| 269 | mktemp(text_file_name);
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| 270 | mktemp(union_file_name);
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| 271 |
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| 272 | len = strlen(file_prefix);
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| 273 |
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| 274 | output_file_name = MALLOC(len + 7);
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| 275 | if (output_file_name == 0)
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| 276 | no_space();
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| 277 | strcpy(output_file_name, file_prefix);
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| 278 | strcpy(output_file_name + len, OUTPUT_SUFFIX);
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| 279 |
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| 280 | if (rflag)
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| 281 | {
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| 282 | code_file_name = MALLOC(len + 8);
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| 283 | if (code_file_name == 0)
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| 284 | no_space();
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| 285 | strcpy(code_file_name, file_prefix);
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| 286 | strcpy(code_file_name + len, CODE_SUFFIX);
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| 287 | }
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| 288 | else
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| 289 | code_file_name = output_file_name;
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| 290 |
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| 291 | if (dflag)
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| 292 | {
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| 293 | defines_file_name = MALLOC(len + 7);
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| 294 | if (defines_file_name == 0)
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| 295 | no_space();
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| 296 | strcpy(defines_file_name, file_prefix);
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| 297 | strcpy(defines_file_name + len, DEFINES_SUFFIX);
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| 298 | }
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| 299 |
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| 300 | if (vflag)
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| 301 | {
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| 302 | verbose_file_name = MALLOC(len + 8);
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| 303 | if (verbose_file_name == 0)
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| 304 | no_space();
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| 305 | strcpy(verbose_file_name, file_prefix);
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| 306 | strcpy(verbose_file_name + len, VERBOSE_SUFFIX);
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| 307 | }
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| 308 | }
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| 309 |
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| 310 |
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| 311 | open_files()
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| 312 | {
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| 313 | create_file_names();
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| 314 |
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| 315 | if (input_file == 0)
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| 316 | {
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| 317 | input_file = fopen(input_file_name, "r");
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| 318 | if (input_file == 0)
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| 319 | open_error(input_file_name);
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| 320 | }
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| 321 |
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| 322 | action_file = fopen(action_file_name, "w");
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| 323 | if (action_file == 0)
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| 324 | open_error(action_file_name);
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| 325 |
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| 326 | text_file = fopen(text_file_name, "w");
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| 327 | if (text_file == 0)
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| 328 | open_error(text_file_name);
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| 329 |
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| 330 | if (vflag)
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| 331 | {
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| 332 | verbose_file = fopen(verbose_file_name, "w");
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| 333 | if (verbose_file == 0)
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| 334 | open_error(verbose_file_name);
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| 335 | }
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| 336 |
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| 337 | if (dflag)
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| 338 | {
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| 339 | defines_file = fopen(defines_file_name, "w");
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| 340 | if (defines_file == 0)
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| 341 | open_error(defines_file_name);
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| 342 | union_file = fopen(union_file_name, "w");
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| 343 | if (union_file == 0)
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| 344 | open_error(union_file_name);
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| 345 | }
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| 346 |
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| 347 | output_file = fopen(output_file_name, "w");
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| 348 | if (output_file == 0)
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| 349 | open_error(output_file_name);
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| 350 |
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| 351 | if (rflag)
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| 352 | {
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| 353 | code_file = fopen(code_file_name, "w");
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| 354 | if (code_file == 0)
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| 355 | open_error(code_file_name);
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| 356 | }
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| 357 | else
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| 358 | code_file = output_file;
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| 359 | }
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| 360 |
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| 361 |
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| 362 | int
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| 363 | main(argc, argv)
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| 364 | int argc;
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| 365 | char *argv[];
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| 366 | {
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| 367 | set_signals();
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| 368 | getargs(argc, argv);
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| 369 | open_files();
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| 370 | reader();
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| 371 | lr0();
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| 372 | lalr();
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| 373 | make_parser();
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| 374 | verbose();
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| 375 | output();
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| 376 | done(0);
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| 377 | /*NOTREACHED*/
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| 378 | }
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