| 1 | /*
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| 2 | * Copyright (c) 1989 The Regents of the University of California.
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * This code is derived from software contributed to Berkeley by
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| 6 | * Robert Paul Corbett.
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| 7 | *
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| 8 | * Redistribution and use in source and binary forms, with or without
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| 9 | * modification, are permitted provided that the following conditions
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| 10 | * are met:
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| 11 | * 1. Redistributions of source code must retain the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer.
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer in the
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| 15 | * documentation and/or other materials provided with the distribution.
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| 16 | * 3. All advertising materials mentioning features or use of this software
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| 17 | * must display the following acknowledgement:
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| 18 | * This product includes software developed by the University of
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| 19 | * California, Berkeley and its contributors.
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| 20 | * 4. Neither the name of the University nor the names of its contributors
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| 21 | * may be used to endorse or promote products derived from this software
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| 22 | * without specific prior written permission.
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| 23 | *
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| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 34 | * SUCH DAMAGE.
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| 35 | */
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| 36 |
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| 37 | #if 0
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| 38 | #ifndef lint
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| 39 | static char sccsid[] = "@(#)main.c 5.5 (Berkeley) 5/24/93";
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| 40 | #endif
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| 41 | #endif
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| 42 |
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| 43 | #include <sys/cdefs.h>
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| 44 | __FBSDID("$FreeBSD: src/usr.bin/yacc/main.c,v 1.22 2004/03/05 02:05:56 wes Exp $");
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| 45 |
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| 46 | #include <paths.h>
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| 47 | #include <signal.h>
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| 48 | #include <stdlib.h>
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| 49 | #include <string.h>
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| 50 | #include <unistd.h>
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| 51 | #include "defs.h"
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| 52 |
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| 53 | char dflag;
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| 54 | char lflag;
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| 55 | char rflag;
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| 56 | char tflag;
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| 57 | char vflag;
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| 58 |
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| 59 | const char *symbol_prefix;
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| 60 | const char *file_prefix = "y";
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| 61 | char temp_form[] = "yacc.XXXXXXXXXXX";
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| 62 |
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| 63 | int lineno;
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| 64 | int outline;
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| 65 |
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| 66 | char *action_file_name;
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| 67 | char *code_file_name;
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| 68 | char *defines_file_name;
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| 69 | const char *input_file_name = "";
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| 70 | char *output_file_name;
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| 71 | char *text_file_name;
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| 72 | char *union_file_name;
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| 73 | char *verbose_file_name;
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| 74 |
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| 75 | FILE *action_file; /* a temp file, used to save actions associated */
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| 76 | /* with rules until the parser is written */
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| 77 | FILE *code_file; /* y.code.c (used when the -r option is specified) */
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| 78 | FILE *defines_file; /* y.tab.h */
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| 79 | FILE *input_file; /* the input file */
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| 80 | FILE *output_file; /* y.tab.c */
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| 81 | FILE *text_file; /* a temp file, used to save text until all */
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| 82 | /* symbols have been defined */
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| 83 | FILE *union_file; /* a temp file, used to save the union */
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| 84 | /* definition until all symbol have been */
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| 85 | /* defined */
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| 86 | FILE *verbose_file; /* y.output */
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| 87 |
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| 88 | int nitems;
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| 89 | int nrules;
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| 90 | int nsyms;
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| 91 | int ntokens;
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| 92 | int nvars;
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| 93 |
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| 94 | int start_symbol;
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| 95 | char **symbol_name;
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| 96 | short *symbol_value;
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| 97 | short *symbol_prec;
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| 98 | char *symbol_assoc;
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| 99 |
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| 100 | short *ritem;
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| 101 | short *rlhs;
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| 102 | short *rrhs;
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| 103 | short *rprec;
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| 104 | char *rassoc;
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| 105 | short **derives;
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| 106 | char *nullable;
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| 107 |
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| 108 | static void create_file_names(void);
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| 109 | static void getargs(int, char **);
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| 110 | static void onintr(int);
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| 111 | static void open_files(void);
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| 112 | static void set_signals(void);
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| 113 | static void usage(void);
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| 114 |
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| 115 | volatile sig_atomic_t sigdie;
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| 116 |
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| 117 | __dead2 void
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| 118 | done(k)
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| 119 | int k;
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| 120 | {
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| 121 | if (action_file) { fclose(action_file); unlink(action_file_name); }
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| 122 | if (text_file) { fclose(text_file); unlink(text_file_name); }
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| 123 | if (union_file) { fclose(union_file); unlink(union_file_name); }
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| 124 | if (sigdie) { _exit(k); }
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| 125 | exit(k);
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| 126 | }
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| 127 |
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| 128 |
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| 129 | static void
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| 130 | onintr(signo)
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| 131 | int signo __unused;
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| 132 | {
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| 133 | sigdie = 1;
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| 134 | done(1);
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| 135 | }
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| 136 |
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| 137 |
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| 138 | static void
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| 139 | set_signals()
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| 140 | {
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| 141 | #ifdef SIGINT
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| 142 | if (signal(SIGINT, SIG_IGN) != SIG_IGN)
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| 143 | signal(SIGINT, onintr);
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| 144 | #endif
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| 145 | #ifdef SIGTERM
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| 146 | if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
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| 147 | signal(SIGTERM, onintr);
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| 148 | #endif
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| 149 | #ifdef SIGHUP
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| 150 | if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
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| 151 | signal(SIGHUP, onintr);
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| 152 | #endif
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| 153 | }
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| 154 |
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| 155 |
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| 156 | static void
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| 157 | usage()
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| 158 | {
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| 159 | fprintf(stderr, "%s\n%s\n",
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| 160 | "usage: yacc [-dlrtv] [-b file_prefix] [-o output_filename]",
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| 161 | " [-p symbol_prefix] filename");
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| 162 | exit(1);
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| 163 | }
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| 164 |
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| 165 |
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| 166 | static void
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| 167 | getargs(argc, argv)
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| 168 | int argc;
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| 169 | char *argv[];
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| 170 | {
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| 171 | int ch;
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| 172 |
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| 173 | while ((ch = getopt(argc, argv, "b:dlo:p:rtv")) != -1)
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| 174 | {
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| 175 | switch (ch)
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| 176 | {
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| 177 | case 'b':
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| 178 | file_prefix = optarg;
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| 179 | break;
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| 180 |
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| 181 | case 'd':
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| 182 | dflag = 1;
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| 183 | break;
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| 184 |
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| 185 | case 'l':
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| 186 | lflag = 1;
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| 187 | break;
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| 188 |
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| 189 | case 'o':
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| 190 | output_file_name = optarg;
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| 191 | break;
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| 192 |
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| 193 | case 'p':
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| 194 | symbol_prefix = optarg;
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| 195 | break;
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| 196 |
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| 197 | case 'r':
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| 198 | rflag = 1;
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| 199 | break;
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| 200 |
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| 201 | case 't':
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| 202 | tflag = 1;
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| 203 | break;
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| 204 |
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| 205 | case 'v':
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| 206 | vflag = 1;
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| 207 | break;
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| 208 |
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| 209 | default:
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| 210 | usage();
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| 211 | }
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| 212 | }
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| 213 |
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| 214 | if (optind + 1 != argc)
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| 215 | usage();
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| 216 | if (strcmp(argv[optind], "-") == 0)
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| 217 | input_file = stdin;
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| 218 | else
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| 219 | input_file_name = argv[optind];
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| 220 | }
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| 221 |
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| 222 |
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| 223 | char *
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| 224 | allocate(n)
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| 225 | unsigned n;
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| 226 | {
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| 227 | char *p;
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| 228 |
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| 229 | p = NULL;
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| 230 | if (n)
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| 231 | {
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| 232 | p = CALLOC(1, n);
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| 233 | if (!p) no_space();
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| 234 | }
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| 235 | return (p);
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| 236 | }
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| 237 |
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| 238 |
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| 239 | static void
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| 240 | create_file_names()
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| 241 | {
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| 242 | int i, len;
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| 243 | const char *tmpdir;
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| 244 |
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| 245 | if (!(tmpdir = getenv("TMPDIR")))
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| 246 | tmpdir = _PATH_TMP;
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| 247 |
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| 248 | len = strlen(tmpdir);
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| 249 | i = len + strlen(temp_form) + 1;
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| 250 | if (len && tmpdir[len-1] != '/')
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| 251 | ++i;
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| 252 |
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| 253 | action_file_name = MALLOC(i);
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| 254 | if (action_file_name == 0) no_space();
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| 255 | text_file_name = MALLOC(i);
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| 256 | if (text_file_name == 0) no_space();
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| 257 | union_file_name = MALLOC(i);
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| 258 | if (union_file_name == 0) no_space();
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| 259 |
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| 260 | strcpy(action_file_name, tmpdir);
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| 261 | strcpy(text_file_name, tmpdir);
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| 262 | strcpy(union_file_name, tmpdir);
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| 263 |
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| 264 | if (len && tmpdir[len - 1] != '/')
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| 265 | {
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| 266 | action_file_name[len] = '/';
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| 267 | text_file_name[len] = '/';
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| 268 | union_file_name[len] = '/';
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| 269 | ++len;
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| 270 | }
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| 271 |
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| 272 | strcpy(action_file_name + len, temp_form);
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| 273 | strcpy(text_file_name + len, temp_form);
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| 274 | strcpy(union_file_name + len, temp_form);
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| 275 |
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| 276 | action_file_name[len + 5] = 'a';
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| 277 | text_file_name[len + 5] = 't';
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| 278 | union_file_name[len + 5] = 'u';
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| 279 |
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| 280 | if (output_file_name != 0)
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| 281 | {
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| 282 | file_prefix = output_file_name;
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| 283 | len = strlen(file_prefix);
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| 284 | }
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| 285 | else
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| 286 | {
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| 287 | len = strlen(file_prefix);
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| 288 | output_file_name = MALLOC(len + 7);
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| 289 | if (output_file_name == 0)
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| 290 | no_space();
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| 291 | strcpy(output_file_name, file_prefix);
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| 292 | strcpy(output_file_name + len, OUTPUT_SUFFIX);
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| 293 | }
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| 294 |
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| 295 | if (rflag)
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| 296 | {
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| 297 | code_file_name = MALLOC(len + 8);
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| 298 | if (code_file_name == 0)
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| 299 | no_space();
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| 300 | strcpy(code_file_name, file_prefix);
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| 301 | if (file_prefix == output_file_name)
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| 302 | {
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| 303 | /*
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| 304 | * XXX ".tab.c" here is OUTPUT_SUFFIX, but since its length is
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| 305 | * in various magic numbers, don't bother using the macro.
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| 306 | */
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| 307 | if (len >= 6 && strcmp(code_file_name + len - 6, ".tab.c") == 0)
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| 308 | strcpy(code_file_name + len - 6, CODE_SUFFIX);
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| 309 | else if (len >= 2 && strcmp(code_file_name + len - 2, ".c") == 0)
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| 310 | strcpy(code_file_name + len - 2, CODE_SUFFIX);
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| 311 | else
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| 312 | strcpy(code_file_name + len, CODE_SUFFIX);
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| 313 | }
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| 314 | else
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| 315 | strcpy(code_file_name + len, CODE_SUFFIX);
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| 316 | }
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| 317 | else
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| 318 | code_file_name = output_file_name;
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| 319 |
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| 320 | if (dflag)
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| 321 | {
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| 322 | defines_file_name = MALLOC(len + 7);
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| 323 | if (defines_file_name == 0)
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| 324 | no_space();
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| 325 | strcpy(defines_file_name, file_prefix);
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| 326 | if (file_prefix == output_file_name)
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| 327 | {
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| 328 | #define BISON_DEFINES_SUFFIX ".h"
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| 329 | if (len >= 2 && strcmp(defines_file_name + len - 2, ".c") == 0)
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| 330 | strcpy(defines_file_name + len - 2, BISON_DEFINES_SUFFIX);
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| 331 | else
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| 332 | strcpy(defines_file_name + len, BISON_DEFINES_SUFFIX);
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| 333 | }
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| 334 | else
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| 335 | strcpy(defines_file_name + len, DEFINES_SUFFIX);
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| 336 | }
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| 337 |
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| 338 | if (vflag)
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| 339 | {
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| 340 | verbose_file_name = MALLOC(len + 8);
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| 341 | if (verbose_file_name == 0)
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| 342 | no_space();
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| 343 | strcpy(verbose_file_name, file_prefix);
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| 344 | if (file_prefix == output_file_name)
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| 345 | {
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| 346 | if (len >= 6 && strcmp(verbose_file_name + len - 6, ".tab.c") == 0)
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| 347 | strcpy(verbose_file_name + len - 6, VERBOSE_SUFFIX);
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| 348 | else if (len >= 2 && strcmp(verbose_file_name + len - 2, ".c") == 0)
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| 349 | strcpy(verbose_file_name + len - 2, VERBOSE_SUFFIX);
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| 350 | else
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| 351 | strcpy(verbose_file_name + len, VERBOSE_SUFFIX);
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| 352 | }
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| 353 | else
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| 354 | strcpy(verbose_file_name + len, VERBOSE_SUFFIX);
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| 355 | }
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| 356 | }
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| 357 |
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| 358 |
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| 359 | static void
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| 360 | open_files()
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| 361 | {
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| 362 | int fd;
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| 363 |
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| 364 | create_file_names();
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| 365 |
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| 366 | if (input_file == 0)
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| 367 | {
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| 368 | input_file = fopen(input_file_name, "r");
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| 369 | if (input_file == 0)
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| 370 | open_error(input_file_name);
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| 371 | }
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| 372 |
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| 373 | fd = mkstemp(action_file_name);
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| 374 | if (fd < 0 || (action_file = fdopen(fd, "w")) == NULL) {
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| 375 | if (fd >= 0)
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| 376 | close(fd);
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| 377 | open_error(action_file_name);
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| 378 | }
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| 379 | fd = mkstemp(text_file_name);
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| 380 | if (fd < 0 || (text_file = fdopen(fd, "w")) == NULL) {
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| 381 | if (fd >= 0)
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| 382 | close(fd);
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| 383 | open_error(text_file_name);
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| 384 | }
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| 385 | fd = mkstemp(union_file_name);
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| 386 | if (fd < 0 || (union_file = fdopen(fd, "w")) == NULL) {
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| 387 | if (fd >= 0)
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| 388 | close(fd);
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| 389 | open_error(union_file_name);
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| 390 | }
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| 391 |
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| 392 | text_file = fopen(text_file_name, "w");
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| 393 | if (text_file == 0)
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| 394 | open_error(text_file_name);
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| 395 |
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| 396 | if (vflag)
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| 397 | {
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| 398 | verbose_file = fopen(verbose_file_name, "w");
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| 399 | if (verbose_file == 0)
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| 400 | open_error(verbose_file_name);
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| 401 | }
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| 402 |
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| 403 | if (dflag)
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| 404 | {
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| 405 | defines_file = fopen(defines_file_name, "w");
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| 406 | if (defines_file == 0)
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| 407 | open_error(defines_file_name);
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| 408 | union_file = fopen(union_file_name, "w");
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| 409 | if (union_file == 0)
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| 410 | open_error(union_file_name);
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| 411 | }
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| 412 |
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| 413 | output_file = fopen(output_file_name, "w");
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| 414 | if (output_file == 0)
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| 415 | open_error(output_file_name);
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| 416 |
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| 417 | if (rflag)
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| 418 | {
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| 419 | code_file = fopen(code_file_name, "w");
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| 420 | if (code_file == 0)
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| 421 | open_error(code_file_name);
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| 422 | }
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| 423 | else
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| 424 | code_file = output_file;
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| 425 | }
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| 426 |
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| 427 |
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| 428 | int
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| 429 | main(int argc, char *argv[])
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| 430 | {
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| 431 | set_signals();
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| 432 | getargs(argc, argv);
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| 433 | open_files();
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| 434 | reader();
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| 435 | lr0();
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| 436 | lalr();
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| 437 | make_parser();
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| 438 | verbose();
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| 439 | output();
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| 440 | done(0);
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| 441 | /*NOTREACHED*/
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| 442 | return (0);
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|---|
| 443 | }
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