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   fprintf (stream, _("\
  70 GNU bison generates parsers for LALR(1) grammars.\n"));
  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   fprintf (stream, _("\
  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"));
  88   putc ('\n', stream);
  89
  90   fprintf (stream, _("\
  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 "));
  99   putc ('\n', stream);
 100
 101   fprintf (stream, _("\
 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"));
 107   putc ('\n', stream);
 108
 109   fprintf (stream, _("\
 110 Report bugs to <bug-bison@gnu.org>.\n"),
 111            program_name);
 112 }
 113
 114 void
 115 getargs (int argc, char *argv[])
 116 {
 117   register int c;
 118
 119   verboseflag = 0;
 120   definesflag = 0;
 121   debugflag = 0;
 122   noparserflag = 0;
 123   rawtoknumflag = 0;
 124   toknumflag = 0;
 125   fixed_outfiles = 0;
 126
 127   while ((c = getopt_long (argc, argv, "yvdhrltknVo:b:p:", longopts, (int *)0))
 128          != EOF)
 129     {
 130       switch (c)
 131         {
 132         case 0:
 133           /* Certain long options cause getopt_long to return 0.  */
 134           break;
 135
 136         case 'y':
 137           fixed_outfiles = 1;
 138           break;
 139
 140         case 'h':
 141           usage (stdout);
 142           exit (0);
 143
 144         case 'V':
 145           printf ("%s\n", VERSION_STRING);
 146           exit (0);
 147
 148         case 'v':
 149           verboseflag = 1;
 150           break;
 151
 152         case 'd':
 153           definesflag = 1;
 154           break;
 155
 156         case 'l':
 157           nolinesflag = 1;
 158           break;
 159
 160         case 'k':
 161           toknumflag = 1;
 162           break;
 163
 164         case 'r':
 165           rawtoknumflag = 1;
 166           break;
 167
 168         case 'n':
 169           noparserflag = 1;
 170           break;
 171
 172         case 't':
 173           debugflag = 1;
 174           break;
 175
 176         case 'o':
 177           spec_outfile = optarg;
 178           break;
 179
 180         case 'b':
 181           spec_file_prefix = optarg;
 182           break;
 183
 184         case 'p':
 185           spec_name_prefix = optarg;
 186           break;
 187
 188         default:
 189           usage (stderr);
 190           exit (1);
 191         }
 192     }
 193
 194   if (optind == argc)
 195     {
 196       fprintf(stderr, _("%s: no grammar file given\n"), program_name);
 197       exit(1);
 198     }
 199   if (optind < argc - 1)
 200     fprintf(stderr, _("%s: extra arguments ignored after `%s'\n"),
 201             program_name, argv[optind]);
 202
 203   infile = argv[optind];
 204 }