src/getargs.c

   1 /* Parse command line arguments for bison.
   2    Copyright 1984, 1986, 1989, 1992, 2000 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 char *spec_file_prefix; /* for -b. */
  28 char *spec_name_prefix; /* for -p.  */
  29
  30 int debug_flag = 0;
  31 int defines_flag = 0;
  32 int locations_flag = 0;
  33 int no_lines_flag = 0;
  34 int no_parser_flag = 0;
  35 int raw_flag = 0;
  36 int token_table_flag = 0;
  37 int verbose_flag = 0;
  38 int statistics_flag = 0;
  39 int yacc_flag = 0;      /* for -y */
  40
  41 extern char *program_name;
  42
  43 static struct option longopts[] =
  44 {
  45   {"debug", 0, &debug_flag, 1},
  46   {"defines", 0, &defines_flag, 1},
  47   {"file-prefix", 1, 0, 'b'},
  48   {"fixed-output-files", 0, &yacc_flag, 1},
  49   {"help", 0, 0, 'h'},
  50   {"name-prefix", 1, 0, 'p'}, /* was 'a';  apparently unused -wjh */
  51   {"locations", 0, &locations_flag, 1},
  52   {"no-lines", 0, &no_lines_flag, 1},
  53   {"no-parser", 0, &no_parser_flag, 1},
  54   {"output", 1, 0, 'o'},
  55   {"output-file", 1, 0, 'o'},
  56   {"raw", 0, &raw_flag, 1},
  57   {"statistics", 0, &statistics_flag, 1},
  58   {"token-table", 0, &token_table_flag, 1},
  59   {"verbose", 0, &verbose_flag, 1},
  60   {"version", 0, 0, 'V'},
  61   {"yacc", 0, &yacc_flag, 1},
  62   {0, 0, 0, 0}
  63 };
  64
  65 /*---------------------------.
  66 | Display the help message.  |
  67 `---------------------------*/
  68
  69 static void
  70 usage (FILE *stream)
  71 {
  72   /* Some efforts were made to ease the translators' task, please
  73      continue.  */
  74   fputs (_("\
  75 GNU bison generates parsers for LALR(1) grammars.\n"), stream);
  76   putc ('\n', stream);
  77
  78   fprintf (stream, _("\
  79 Usage: %s [OPTION]... FILE\n"), program_name);
  80   putc ('\n', stream);
  81
  82   fputs (_("\
  83 If a long option shows an argument as mandatory, then it is mandatory\n\
  84 for the equivalent short option also.  Similarly for optional arguments.\n"),
  85          stream);
  86   putc ('\n', stream);
  87
  88   fputs (_("\
  89 Operation modes:\n\
  90   -h, --help      display this help and exit\n\
  91   -V, --version   output version information and exit\n\
  92   -y, --yacc      emulate POSIX yacc\n"), stream);
  93   putc ('\n', stream);
  94
  95   fputs (_("\
  96 Parser:\n\
  97   -t, --debug                instrument the parser for debugging\n\
  98       --locations            enable locations computation\n\
  99   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
 100   -l, --no-lines             don't generate `#line' directives\n\
 101   -n, --no-parser            generate the tables only\n\
 102   -r, --raw                  number the tokens from 3\n\
 103   -k, --token-table          include a table of token names\n\
 104 "), stream);
 105   putc ('\n', stream);
 106
 107   fputs (_("\
 108 Output:\n\
 109   -d, --defines              also produce a header file\n\
 110   -v, --verbose              also produce an explanation of the automaton\n\
 111   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 112   -o, --output-file=FILE     leave output to FILE\n"), stream);
 113   putc ('\n', stream);
 114
 115   fputs (_("\
 116 Report bugs to <bug-bison@gnu.org>.\n"), stream);
 117 }
 118
 119
 120 /*------------------------------.
 121 | Display the version message.  |
 122 `------------------------------*/
 123
 124 static void
 125 version (FILE *stream)
 126 {
 127   /* Some efforts were made to ease the translators' task, please
 128      continue.  */
 129   fprintf (stream, _("\
 130 bison (GNU Bison) %s"), VERSION);
 131   putc ('\n', stream);
 132   putc ('\n', stream);
 133
 134   fputs (_("\
 135 Copyright 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc.\n"),
 136          stream);
 137
 138   fputs (_("\
 139 This is free software; see the source for copying conditions.  There is NO\n\
 140 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 141 "),
 142          stream);
 143 }
 144
 145
 146 /*----------------------.
 147 | Process the options.  |
 148 `----------------------*/
 149
 150 void
 151 getargs (int argc, char *argv[])
 152 {
 153   int c;
 154
 155   while ((c = getopt_long (argc, argv, "yvdhrltknVo:b:p:", longopts, (int *)0))
 156          != EOF)
 157     {
 158       switch (c)
 159         {
 160         case 0:
 161           /* Certain long options cause getopt_long to return 0.  */
 162           break;
 163
 164         case 'y':
 165           yacc_flag = 1;
 166           break;
 167
 168         case 'h':
 169           usage (stdout);
 170           exit (0);
 171
 172         case 'V':
 173           version (stdout);
 174           exit (0);
 175
 176         case 'v':
 177           verbose_flag = 1;
 178           break;
 179
 180         case 'd':
 181           defines_flag = 1;
 182           break;
 183
 184         case 'l':
 185           no_lines_flag = 1;
 186           break;
 187
 188         case 'k':
 189           token_table_flag = 1;
 190           break;
 191
 192         case 'r':
 193           raw_flag = 1;
 194           break;
 195
 196         case 'n':
 197           no_parser_flag = 1;
 198           break;
 199
 200         case 't':
 201           debug_flag = 1;
 202           break;
 203
 204         case 'o':
 205           spec_outfile = optarg;
 206           break;
 207
 208         case 'b':
 209           spec_file_prefix = optarg;
 210           break;
 211
 212         case 'p':
 213           spec_name_prefix = optarg;
 214           break;
 215
 216         default:
 217           fprintf (stderr, _("Try `%s --help' for more information.\n"),
 218                    program_name);
 219           exit (1);
 220         }
 221     }
 222
 223   if (optind == argc)
 224     {
 225       fprintf (stderr, _("%s: no grammar file given\n"), program_name);
 226       exit (1);
 227     }
 228   if (optind < argc - 1)
 229     fprintf (stderr, _("%s: extra arguments ignored after `%s'\n"),
 230              program_name, argv[optind]);
 231
 232   infile = argv[optind];
 233 }