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 char *skeleton = 0;
  33 int token_table_flag = 0;
  34 int verbose_flag = 0;
  35 int statistics_flag = 0;
  36 int yacc_flag = 0;      /* for -y */
  37
  38 extern char *program_name;
  39 const char *shortopts = "yvdhrltknVo:b:p:S:";
  40 static struct option longopts[] =
  41 {
  42   /* Operation modes. */
  43   {"help",              no_argument,    0, 'h'},
  44   {"version",           no_argument,    0, 'V'},
  45   {"yacc",              no_argument,    0, 'y'},
  46   {"fixed-output-files",no_argument,    0, 'y'},
  47
  48   /* Parser. */
  49   {"skeleton",          required_argument,      0, 'S'},
  50   {"debug",             no_argument,            0, 'd'},
  51   {"locations",         no_argument,    &locations_flag, 1},
  52   /* was 'a';  apparently unused -wjh */
  53   {"name-prefix",       required_argument,      0, 'p'},
  54   {"no-lines",          no_argument,            0, 'l'},
  55   {"no-parser",         no_argument,            0, 'n'},
  56   {"raw",               no_argument,            0, 'r'},
  57   {"token-table",       no_argument,            0, 'k'},
  58
  59   /* Output. */
  60   {"defines",           no_argument,            0, 'd'},
  61   {"verbose",           no_argument,            0, 'v'},
  62   {"file-prefix",       required_argument,      0, 'b'},
  63   {"output-file",       required_argument,      0, 'o'},
  64
  65   /* Hidden. */
  66   {"statistics",        no_argument,    &statistics_flag, 1},
  67   {0, 0, 0, 0}
  68 };
  69
  70 /*---------------------------.
  71 | Display the help message.  |
  72 `---------------------------*/
  73
  74 static void
  75 usage (FILE *stream)
  76 {
  77   /* Some efforts were made to ease the translators' task, please
  78      continue.  */
  79   fputs (_("\
  80 GNU bison generates parsers for LALR(1) grammars.\n"), stream);
  81   putc ('\n', stream);
  82
  83   fprintf (stream, _("\
  84 Usage: %s [OPTION]... FILE\n"), program_name);
  85   putc ('\n', stream);
  86
  87   fputs (_("\
  88 If a long option shows an argument as mandatory, then it is mandatory\n\
  89 for the equivalent short option also.  Similarly for optional arguments.\n"),
  90          stream);
  91   putc ('\n', stream);
  92
  93   fputs (_("\
  94 Operation modes:\n\
  95   -h, --help      display this help and exit\n\
  96   -V, --version   output version information and exit\n\
  97   -y, --yacc      emulate POSIX yacc\n"), stream);
  98   putc ('\n', stream);
  99
 100   fputs (_("\
 101 Parser:\n\
 102   -S, --skeleton=FILE        specify the skeleton to use\n\
 103   -t, --debug                instrument the parser for debugging\n\
 104       --locations            enable locations computation\n\
 105   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
 106   -l, --no-lines             don't generate `#line' directives\n\
 107   -n, --no-parser            generate the tables only\n\
 108   -k, --token-table          include a table of token names\n\
 109 "), stream);
 110   putc ('\n', stream);
 111
 112   fputs (_("\
 113 Output:\n\
 114   -d, --defines              also produce a header file\n\
 115   -v, --verbose              also produce an explanation of the automaton\n\
 116   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 117   -o, --output-file=FILE     leave output to FILE\n"), stream);
 118   putc ('\n', stream);
 119
 120   fputs (_("\
 121 Report bugs to <bug-bison@gnu.org>.\n"), stream);
 122 }
 123
 124
 125 /*------------------------------.
 126 | Display the version message.  |
 127 `------------------------------*/
 128
 129 static void
 130 version (FILE *stream)
 131 {
 132   /* Some efforts were made to ease the translators' task, please
 133      continue.  */
 134   fprintf (stream, _("\
 135 bison (GNU Bison) %s"), VERSION);
 136   putc ('\n', stream);
 137   putc ('\n', stream);
 138
 139   fputs (_("\
 140 Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc.\n"),
 141          stream);
 142
 143   fputs (_("\
 144 This is free software; see the source for copying conditions.  There is NO\n\
 145 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 146 "),
 147          stream);
 148 }
 149
 150
 151 /*----------------------.
 152 | Process the options.  |
 153 `----------------------*/
 154
 155 void
 156 getargs (int argc, char *argv[])
 157 {
 158   int c;
 159
 160   while ((c = getopt_long (argc, argv, shortopts, longopts, NULL)) != EOF)
 161     switch (c)
 162       {
 163       case 0:
 164         /* Certain long options cause getopt_long to return 0.  */
 165         break;
 166
 167       case 'y':
 168         yacc_flag = 1;
 169         break;
 170
 171       case 'h':
 172         usage (stdout);
 173         exit (0);
 174
 175       case 'V':
 176         version (stdout);
 177         exit (0);
 178
 179       case 'v':
 180         verbose_flag = 1;
 181         break;
 182
 183       case 'S':
 184         skeleton = optarg;
 185         break;
 186
 187       case 'd':
 188         defines_flag = 1;
 189         break;
 190
 191       case 'l':
 192         no_lines_flag = 1;
 193         break;
 194
 195       case 'k':
 196         token_table_flag = 1;
 197         break;
 198
 199       case 'r':
 200         fatal (_("`%s' is no longer supported"), "--raw");
 201         break;
 202
 203       case 'n':
 204         no_parser_flag = 1;
 205         break;
 206
 207       case 't':
 208         debug_flag = 1;
 209         break;
 210
 211       case 'o':
 212         spec_outfile = optarg;
 213         break;
 214
 215       case 'b':
 216         spec_file_prefix = optarg;
 217         break;
 218
 219       case 'p':
 220         spec_name_prefix = optarg;
 221         break;
 222
 223       default:
 224         fprintf (stderr, _("Try `%s --help' for more information.\n"),
 225                  program_name);
 226         exit (1);
 227       }
 228
 229   if (optind == argc)
 230     {
 231       fprintf (stderr, _("%s: no grammar file given\n"), program_name);
 232       exit (1);
 233     }
 234   if (optind < argc - 1)
 235     fprintf (stderr, _("%s: extra arguments ignored after `%s'\n"),
 236              program_name, argv[optind]);
 237
 238   infile = argv[optind];
 239 }