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
  41 struct option longopts[] =
  42 {
  43   {"debug", 0, &debugflag, 1},
  44   {"defines", 0, &definesflag, 1},
  45   {"file-prefix", 1, 0, 'b'},
  46   {"fixed-output-files", 0, &fixed_outfiles, 1},
  47   {"help", 0, 0, 'h'},
  48   {"name-prefix", 1, 0, 'p'}, /* was 'a';  apparently unused -wjh */
  49   {"no-lines", 0, &nolinesflag, 1},
  50   {"no-parser", 0, &noparserflag, 1},
  51   {"output", 1, 0, 'o'},
  52   {"output-file", 1, 0, 'o'},
  53   {"raw", 0, &rawtoknumflag, 1},
  54   {"token-table", 0, &toknumflag, 1},
  55   {"verbose", 0, &verboseflag, 1},
  56   {"version", 0, 0, 'V'},
  57   {"yacc", 0, &fixed_outfiles, 1},
  58   {0, 0, 0, 0}
  59 };
  60
  61 /*---------------------------.
  62 | Display the help message.  |
  63 `---------------------------*/
  64 void
  65 usage (FILE *stream)
  66 {
  67   /* Some efforts were made to ease the translators' task, please
  68      continue.  */
  69   fputs (_("\
  70 GNU bison generates parsers for LALR(1) grammars.\n"), stream);
  71   putc ('\n', stream);
  72
  73   fprintf (stream, _("\
  74 Usage: %s [OPTION]... FILE\n"), program_name);
  75   putc ('\n', stream);
  76
  77   fputs (_("\
  78 If a long option shows an argument as mandatory, then it is mandatory\n\
  79 for the equivalent short option also.  Similarly for optional arguments.\n"),
  80          stream);
  81   putc ('\n', stream);
  82
  83   fputs (_("\
  84 Operation modes:\n\
  85   -h, --help      display this help and exit\n\
  86   -V, --version   output version information and exit\n\
  87   -y, --yacc      emulate POSIX yacc\n"), stream);
  88   putc ('\n', stream);
  89
  90   fputs (_("\
  91 Parser:\n\
  92   -t, --debug                instrument the parser for debugging\n\
  93   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
  94   -l, --no-lines             don't generate `#line' directives\n\
  95   -n, --no-parser            generate the tables only\n\
  96   -r, --raw                  number the tokens from 3\n\
  97   -k, --token-table          include a table of token names\n\
  98 "), stream);
  99   putc ('\n', stream);
 100
 101   fputs (_("\
 102 Output:\n\
 103   -d, --defines              also produce a header file\n\
 104   -v, --verbose              also produce an explanation of the automaton\n\
 105   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 106   -o, --output-file=FILE     leave output to FILE\n"), stream);
 107   putc ('\n', stream);
 108
 109   fputs (_("\
 110 Report bugs to <bug-bison@gnu.org>.\n"), stream);
 111 }
 112
 113 void
 114 getargs (int argc, char *argv[])
 115 {
 116   register int c;
 117
 118   verboseflag = 0;
 119   definesflag = 0;
 120   debugflag = 0;
 121   noparserflag = 0;
 122   rawtoknumflag = 0;
 123   toknumflag = 0;
 124   fixed_outfiles = 0;
 125
 126   while ((c = getopt_long (argc, argv, "yvdhrltknVo:b:p:", longopts, (int *)0))
 127          != EOF)
 128     {
 129       switch (c)
 130         {
 131         case 0:
 132           /* Certain long options cause getopt_long to return 0.  */
 133           break;
 134
 135         case 'y':
 136           fixed_outfiles = 1;
 137           break;
 138
 139         case 'h':
 140           usage (stdout);
 141           exit (0);
 142
 143         case 'V':
 144           printf ("%s\n", VERSION_STRING);
 145           exit (0);
 146
 147         case 'v':
 148           verboseflag = 1;
 149           break;
 150
 151         case 'd':
 152           definesflag = 1;
 153           break;
 154
 155         case 'l':
 156           nolinesflag = 1;
 157           break;
 158
 159         case 'k':
 160           toknumflag = 1;
 161           break;
 162
 163         case 'r':
 164           rawtoknumflag = 1;
 165           break;
 166
 167         case 'n':
 168           noparserflag = 1;
 169           break;
 170
 171         case 't':
 172           debugflag = 1;
 173           break;
 174
 175         case 'o':
 176           spec_outfile = optarg;
 177           break;
 178
 179         case 'b':
 180           spec_file_prefix = optarg;
 181           break;
 182
 183         case 'p':
 184           spec_name_prefix = optarg;
 185           break;
 186
 187         default:
 188           usage (stderr);
 189           exit (1);
 190         }
 191     }
 192
 193   if (optind == argc)
 194     {
 195       fprintf(stderr, _("%s: no grammar file given\n"), program_name);
 196       exit(1);
 197     }
 198   if (optind < argc - 1)
 199     fprintf(stderr, _("%s: extra arguments ignored after `%s'\n"),
 200             program_name, argv[optind]);
 201
 202   infile = argv[optind];
 203 }