src/getargs.c

   1 /* Parse command line arguments for bison.
   2    Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc.
   3
   4    This file is part of Bison, the GNU Compiler Compiler.
   5
   6    Bison is free software; you can redistribute it and/or modify it
   7    under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    Bison is distributed in the hope that it will be useful, but
  12    WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with Bison; see the file COPYING.  If not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19    02111-1307, USA.  */
  20
  21 #include <stdio.h>
  22 #include "getopt.h"
  23 #include "system.h"
  24 #include "files.h"
  25 #include "getargs.h"
  26
  27 int debug_flag = 0;
  28 int defines_flag = 0;
  29 int locations_flag = 0;
  30 int no_lines_flag = 0;
  31 int no_parser_flag = 0;
  32 int raw_flag = 0;
  33 char *skeleton = 0;
  34 int token_table_flag = 0;
  35 int verbose_flag = 0;
  36 int statistics_flag = 0;
  37 int yacc_flag = 0;      /* for -y */
  38
  39 extern char *program_name;
  40 const char *shortopts = "yvdhrltknVo:b:p:S:";
  41 static struct option longopts[] =
  42 {
  43   /* Operation modes. */
  44   {"help",              no_argument,    0, 'h'},
  45   {"version",           no_argument,    0, 'V'},
  46   {"yacc",              no_argument,    0, 'y'},
  47   {"fixed-output-files",no_argument,    0, 'y'},
  48
  49   /* Parser. */
  50   {"skeleton",          required_argument,      0, 'S'},
  51   {"debug",             no_argument,            0, 'd'},
  52   {"locations",         no_argument,    &locations_flag, 1},
  53   /* was 'a';  apparently unused -wjh */
  54   {"name-prefix",       required_argument,      0, 'p'},
  55   {"no-lines",          no_argument,            0, 'l'},
  56   {"no-parser",         no_argument,            0, 'n'},
  57   {"raw",               no_argument,            0, 'r'},
  58   {"token-table",       no_argument,            0, 'k'},
  59
  60   /* Output. */
  61   {"defines",           no_argument,            0, 'd'},
  62   {"verbose",           no_argument,            0, 'v'},
  63   {"file-prefix",       required_argument,      0, 'b'},
  64   {"output-file",       required_argument,      0, 'o'},
  65
  66   /* Hidden. */
  67   {"statistics",        no_argument,    &statistics_flag, 1},
  68   {0, 0, 0, 0}
  69 };
  70
  71 /*---------------------------.
  72 | Display the help message.  |
  73 `---------------------------*/
  74
  75 static void
  76 usage (FILE *stream)
  77 {
  78   /* Some efforts were made to ease the translators' task, please
  79      continue.  */
  80   fputs (_("\
  81 GNU bison generates parsers for LALR(1) grammars.\n"), stream);
  82   putc ('\n', stream);
  83
  84   fprintf (stream, _("\
  85 Usage: %s [OPTION]... FILE\n"), program_name);
  86   putc ('\n', stream);
  87
  88   fputs (_("\
  89 If a long option shows an argument as mandatory, then it is mandatory\n\
  90 for the equivalent short option also.  Similarly for optional arguments.\n"),
  91          stream);
  92   putc ('\n', stream);
  93
  94   fputs (_("\
  95 Operation modes:\n\
  96   -h, --help      display this help and exit\n\
  97   -V, --version   output version information and exit\n\
  98   -y, --yacc      emulate POSIX yacc\n"), stream);
  99   putc ('\n', stream);
 100
 101   fputs (_("\
 102 Parser:\n\
 103   -S, --skeleton=FILE        specify the skeleton to use\n\
 104   -t, --debug                instrument the parser for debugging\n\
 105       --locations            enable locations computation\n\
 106   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
 107   -l, --no-lines             don't generate `#line' directives\n\
 108   -n, --no-parser            generate the tables only\n\
 109   -r, --raw                  number the tokens from 3\n\
 110   -k, --token-table          include a table of token names\n\
 111 "), stream);
 112   putc ('\n', stream);
 113
 114   fputs (_("\
 115 Output:\n\
 116   -d, --defines              also produce a header file\n\
 117   -v, --verbose              also produce an explanation of the automaton\n\
 118   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 119   -o, --output-file=FILE     leave output to FILE\n"), stream);
 120   putc ('\n', stream);
 121
 122   fputs (_("\
 123 Report bugs to <bug-bison@gnu.org>.\n"), stream);
 124 }
 125
 126
 127 /*------------------------------.
 128 | Display the version message.  |
 129 `------------------------------*/
 130
 131 static void
 132 version (FILE *stream)
 133 {
 134   /* Some efforts were made to ease the translators' task, please
 135      continue.  */
 136   fprintf (stream, _("\
 137 bison (GNU Bison) %s"), VERSION);
 138   putc ('\n', stream);
 139   putc ('\n', stream);
 140
 141   fputs (_("\
 142 Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc.\n"),
 143          stream);
 144
 145   fputs (_("\
 146 This is free software; see the source for copying conditions.  There is NO\n\
 147 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 148 "),
 149          stream);
 150 }
 151
 152
 153 /*----------------------.
 154 | Process the options.  |
 155 `----------------------*/
 156
 157 void
 158 getargs (int argc, char *argv[])
 159 {
 160   int c;
 161
 162   while ((c = getopt_long (argc, argv, shortopts, longopts, NULL)) != EOF)
 163     switch (c)
 164       {
 165       case 0:
 166         /* Certain long options cause getopt_long to return 0.  */
 167         break;
 168
 169       case 'y':
 170         yacc_flag = 1;
 171         break;
 172
 173       case 'h':
 174         usage (stdout);
 175         exit (0);
 176
 177       case 'V':
 178         version (stdout);
 179         exit (0);
 180
 181       case 'v':
 182         verbose_flag = 1;
 183         break;
 184
 185       case 'S':
 186         skeleton = optarg;
 187         break;
 188
 189       case 'd':
 190         defines_flag = 1;
 191         break;
 192
 193       case 'l':
 194         no_lines_flag = 1;
 195         break;
 196
 197       case 'k':
 198         token_table_flag = 1;
 199         break;
 200
 201       case 'r':
 202         raw_flag = 1;
 203         break;
 204
 205       case 'n':
 206         no_parser_flag = 1;
 207         break;
 208
 209       case 't':
 210         debug_flag = 1;
 211         break;
 212
 213       case 'o':
 214         spec_outfile = optarg;
 215         break;
 216
 217       case 'b':
 218         spec_file_prefix = optarg;
 219         break;
 220
 221       case 'p':
 222         spec_name_prefix = optarg;
 223         break;
 224
 225       default:
 226         fprintf (stderr, _("Try `%s --help' for more information.\n"),
 227                  program_name);
 228         exit (1);
 229       }
 230
 231   if (optind == argc)
 232     {
 233       fprintf (stderr, _("%s: no grammar file given\n"), program_name);
 234       exit (1);
 235     }
 236   if (optind < argc - 1)
 237     fprintf (stderr, _("%s: extra arguments ignored after `%s'\n"),
 238              program_name, argv[optind]);
 239
 240   infile = argv[optind];
 241 }