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
  26 int verboseflag;
  27 int definesflag;
  28 int debugflag;
  29 int nolinesflag;
  30 int noparserflag = 0;
  31 int toknumflag = 0;
  32 int rawtoknumflag = 0;
  33 char *spec_name_prefix; /* for -p.  */
  34 char *spec_file_prefix; /* for -b. */
  35 extern int fixed_outfiles;/* for -y */
  36
  37 extern char *program_name;
  38
  39 extern void warns PARAMS((char *, char *));     /* main.c */
  40 extern void getargs PARAMS((int argc, char *[]));
  41
  42 static struct option longopts[] =
  43 {
  44   {"debug", 0, &debugflag, 1},
  45   {"defines", 0, &definesflag, 1},
  46   {"file-prefix", 1, 0, 'b'},
  47   {"fixed-output-files", 0, &fixed_outfiles, 1},
  48   {"help", 0, 0, 'h'},
  49   {"name-prefix", 1, 0, 'p'}, /* was 'a';  apparently unused -wjh */
  50   {"no-lines", 0, &nolinesflag, 1},
  51   {"no-parser", 0, &noparserflag, 1},
  52   {"output", 1, 0, 'o'},
  53   {"output-file", 1, 0, 'o'},
  54   {"raw", 0, &rawtoknumflag, 1},
  55   {"token-table", 0, &toknumflag, 1},
  56   {"verbose", 0, &verboseflag, 1},
  57   {"version", 0, 0, 'V'},
  58   {"yacc", 0, &fixed_outfiles, 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   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
  96   -l, --no-lines             don't generate `#line' directives\n\
  97   -n, --no-parser            generate the tables only\n\
  98   -r, --raw                  number the tokens from 3\n\
  99   -k, --token-table          include a table of token names\n\
 100 "), stream);
 101   putc ('\n', stream);
 102
 103   fputs (_("\
 104 Output:\n\
 105   -d, --defines              also produce a header file\n\
 106   -v, --verbose              also produce an explanation of the automaton\n\
 107   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 108   -o, --output-file=FILE     leave output to FILE\n"), stream);
 109   putc ('\n', stream);
 110
 111   fputs (_("\
 112 Report bugs to <bug-bison@gnu.org>.\n"), stream);
 113 }
 114
 115
 116 /*------------------------------.
 117 | Display the version message.  |
 118 `------------------------------*/
 119
 120 static void
 121 version (FILE *stream)
 122 {
 123   /* Some efforts were made to ease the translators' task, please
 124      continue.  */
 125   fprintf (stream, _("\
 126 bison (GNU Bison) %s"), VERSION);
 127   putc ('\n', stream);
 128   putc ('\n', stream);
 129
 130   fputs (_("\
 131 Copyright (C) 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc.\n"),
 132          stream);
 133
 134   fputs (_("\
 135 This is free software; see the source for copying conditions.  There is NO\n\
 136 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 137 "),
 138          stream);
 139 }
 140
 141
 142 /*----------------------.
 143 | Process the options.  |
 144 `----------------------*/
 145
 146 void
 147 getargs (int argc, char *argv[])
 148 {
 149   register int c;
 150
 151   verboseflag = 0;
 152   definesflag = 0;
 153   debugflag = 0;
 154   noparserflag = 0;
 155   rawtoknumflag = 0;
 156   toknumflag = 0;
 157   fixed_outfiles = 0;
 158
 159   while ((c = getopt_long (argc, argv, "yvdhrltknVo:b:p:", longopts, (int *)0))
 160          != EOF)
 161     {
 162       switch (c)
 163         {
 164         case 0:
 165           /* Certain long options cause getopt_long to return 0.  */
 166           break;
 167
 168         case 'y':
 169           fixed_outfiles = 1;
 170           break;
 171
 172         case 'h':
 173           usage (stdout);
 174           exit (0);
 175
 176         case 'V':
 177           version (stdout);
 178           exit (0);
 179
 180         case 'v':
 181           verboseflag = 1;
 182           break;
 183
 184         case 'd':
 185           definesflag = 1;
 186           break;
 187
 188         case 'l':
 189           nolinesflag = 1;
 190           break;
 191
 192         case 'k':
 193           toknumflag = 1;
 194           break;
 195
 196         case 'r':
 197           rawtoknumflag = 1;
 198           break;
 199
 200         case 'n':
 201           noparserflag = 1;
 202           break;
 203
 204         case 't':
 205           debugflag = 1;
 206           break;
 207
 208         case 'o':
 209           spec_outfile = optarg;
 210           break;
 211
 212         case 'b':
 213           spec_file_prefix = optarg;
 214           break;
 215
 216         case 'p':
 217           spec_name_prefix = optarg;
 218           break;
 219
 220         default:
 221           usage (stderr);
 222           exit (1);
 223         }
 224     }
 225
 226   if (optind == argc)
 227     {
 228       fprintf (stderr, _("%s: no grammar file given\n"), program_name);
 229       exit (1);
 230     }
 231   if (optind < argc - 1)
 232     fprintf (stderr, _("%s: extra arguments ignored after `%s'\n"),
 233              program_name, argv[optind]);
 234
 235   infile = argv[optind];
 236 }