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