src/getargs.c

   1 /* Parse command line arguments for bison.
   2    Copyright (C) 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 debugflag = 0;
  31 int definesflag = 0;
  32 int nolinesflag = 0;
  33 int noparserflag = 0;
  34 int rawtoknumflag = 0;
  35 int toknumflag = 0;
  36 int verboseflag = 0;
  37
  38 extern int fixed_outfiles;/* for -y */
  39
  40 extern char *program_name;
  41
  42 extern void warns PARAMS((char *, char *));     /* main.c */
  43 extern void getargs PARAMS((int argc, char *[]));
  44
  45 static struct option longopts[] =
  46 {
  47   {"debug", 0, &debugflag, 1},
  48   {"defines", 0, &definesflag, 1},
  49   {"file-prefix", 1, 0, 'b'},
  50   {"fixed-output-files", 0, &fixed_outfiles, 1},
  51   {"help", 0, 0, 'h'},
  52   {"name-prefix", 1, 0, 'p'}, /* was 'a';  apparently unused -wjh */
  53   {"no-lines", 0, &nolinesflag, 1},
  54   {"no-parser", 0, &noparserflag, 1},
  55   {"output", 1, 0, 'o'},
  56   {"output-file", 1, 0, 'o'},
  57   {"raw", 0, &rawtoknumflag, 1},
  58   {"token-table", 0, &toknumflag, 1},
  59   {"verbose", 0, &verboseflag, 1},
  60   {"version", 0, 0, 'V'},
  61   {"yacc", 0, &fixed_outfiles, 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   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
  99   -l, --no-lines             don't generate `#line' directives\n\
 100   -n, --no-parser            generate the tables only\n\
 101   -r, --raw                  number the tokens from 3\n\
 102   -k, --token-table          include a table of token names\n\
 103 "), stream);
 104   putc ('\n', stream);
 105
 106   fputs (_("\
 107 Output:\n\
 108   -d, --defines              also produce a header file\n\
 109   -v, --verbose              also produce an explanation of the automaton\n\
 110   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 111   -o, --output-file=FILE     leave output to FILE\n"), stream);
 112   putc ('\n', stream);
 113
 114   fputs (_("\
 115 Report bugs to <bug-bison@gnu.org>.\n"), stream);
 116 }
 117
 118
 119 /*------------------------------.
 120 | Display the version message.  |
 121 `------------------------------*/
 122
 123 static void
 124 version (FILE *stream)
 125 {
 126   /* Some efforts were made to ease the translators' task, please
 127      continue.  */
 128   fprintf (stream, _("\
 129 bison (GNU Bison) %s"), VERSION);
 130   putc ('\n', stream);
 131   putc ('\n', stream);
 132
 133   fputs (_("\
 134 Copyright (C) 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc.\n"),
 135          stream);
 136
 137   fputs (_("\
 138 This is free software; see the source for copying conditions.  There is NO\n\
 139 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 140 "),
 141          stream);
 142 }
 143
 144
 145 /*----------------------.
 146 | Process the options.  |
 147 `----------------------*/
 148
 149 void
 150 getargs (int argc, char *argv[])
 151 {
 152   register int c;
 153
 154   verboseflag = 0;
 155   definesflag = 0;
 156   debugflag = 0;
 157   noparserflag = 0;
 158   rawtoknumflag = 0;
 159   toknumflag = 0;
 160   fixed_outfiles = 0;
 161
 162   while ((c = getopt_long (argc, argv, "yvdhrltknVo:b:p:", longopts, (int *)0))
 163          != EOF)
 164     {
 165       switch (c)
 166         {
 167         case 0:
 168           /* Certain long options cause getopt_long to return 0.  */
 169           break;
 170
 171         case 'y':
 172           fixed_outfiles = 1;
 173           break;
 174
 175         case 'h':
 176           usage (stdout);
 177           exit (0);
 178
 179         case 'V':
 180           version (stdout);
 181           exit (0);
 182
 183         case 'v':
 184           verboseflag = 1;
 185           break;
 186
 187         case 'd':
 188           definesflag = 1;
 189           break;
 190
 191         case 'l':
 192           nolinesflag = 1;
 193           break;
 194
 195         case 'k':
 196           toknumflag = 1;
 197           break;
 198
 199         case 'r':
 200           rawtoknumflag = 1;
 201           break;
 202
 203         case 'n':
 204           noparserflag = 1;
 205           break;
 206
 207         case 't':
 208           debugflag = 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           usage (stderr);
 225           exit (1);
 226         }
 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 }