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 static void usage PARAMS((FILE *));
  41 extern void getargs PARAMS((int argc, char *[]));
  42
  43 static struct option longopts[] =
  44 {
  45   {"debug", 0, &debugflag, 1},
  46   {"defines", 0, &definesflag, 1},
  47   {"file-prefix", 1, 0, 'b'},
  48   {"fixed-output-files", 0, &fixed_outfiles, 1},
  49   {"help", 0, 0, 'h'},
  50   {"name-prefix", 1, 0, 'p'}, /* was 'a';  apparently unused -wjh */
  51   {"no-lines", 0, &nolinesflag, 1},
  52   {"no-parser", 0, &noparserflag, 1},
  53   {"output", 1, 0, 'o'},
  54   {"output-file", 1, 0, 'o'},
  55   {"raw", 0, &rawtoknumflag, 1},
  56   {"token-table", 0, &toknumflag, 1},
  57   {"verbose", 0, &verboseflag, 1},
  58   {"version", 0, 0, 'V'},
  59   {"yacc", 0, &fixed_outfiles, 1},
  60   {0, 0, 0, 0}
  61 };
  62
  63 /*---------------------------.
  64 | Display the help message.  |
  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 void
 116 getargs (int argc, char *argv[])
 117 {
 118   register int c;
 119
 120   verboseflag = 0;
 121   definesflag = 0;
 122   debugflag = 0;
 123   noparserflag = 0;
 124   rawtoknumflag = 0;
 125   toknumflag = 0;
 126   fixed_outfiles = 0;
 127
 128   while ((c = getopt_long (argc, argv, "yvdhrltknVo:b:p:", longopts, (int *)0))
 129          != EOF)
 130     {
 131       switch (c)
 132         {
 133         case 0:
 134           /* Certain long options cause getopt_long to return 0.  */
 135           break;
 136
 137         case 'y':
 138           fixed_outfiles = 1;
 139           break;
 140
 141         case 'h':
 142           usage (stdout);
 143           exit (0);
 144
 145         case 'V':
 146           printf ("%s\n", VERSION_STRING);
 147           exit (0);
 148
 149         case 'v':
 150           verboseflag = 1;
 151           break;
 152
 153         case 'd':
 154           definesflag = 1;
 155           break;
 156
 157         case 'l':
 158           nolinesflag = 1;
 159           break;
 160
 161         case 'k':
 162           toknumflag = 1;
 163           break;
 164
 165         case 'r':
 166           rawtoknumflag = 1;
 167           break;
 168
 169         case 'n':
 170           noparserflag = 1;
 171           break;
 172
 173         case 't':
 174           debugflag = 1;
 175           break;
 176
 177         case 'o':
 178           spec_outfile = optarg;
 179           break;
 180
 181         case 'b':
 182           spec_file_prefix = optarg;
 183           break;
 184
 185         case 'p':
 186           spec_name_prefix = optarg;
 187           break;
 188
 189         default:
 190           usage (stderr);
 191           exit (1);
 192         }
 193     }
 194
 195   if (optind == argc)
 196     {
 197       fprintf(stderr, _("%s: no grammar file given\n"), program_name);
 198       exit(1);
 199     }
 200   if (optind < argc - 1)
 201     fprintf(stderr, _("%s: extra arguments ignored after `%s'\n"),
 202             program_name, argv[optind]);
 203
 204   infile = argv[optind];
 205 }