src/getargs.c

   1 /* Parse command line arguments for bison.
   2    Copyright 1984, 1986, 1989, 1992, 2000, 2001 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 "complain.h"
  26 #include "getargs.h"
  27
  28 int debug_flag = 0;
  29 int defines_flag = 0;
  30 int locations_flag = 0;
  31 int no_lines_flag = 0;
  32 int no_parser_flag = 0;
  33 int token_table_flag = 0;
  34 int verbose_flag = 0;
  35 int statistics_flag = 0;
  36 int yacc_flag = 0;      /* for -y */
  37 int graph_flag = 0;
  38
  39 const char *skeleton = NULL;
  40
  41 extern char *program_name;
  42 const char *shortopts = "yvgdhrltknVo:b:p:S:";
  43 static struct option longopts[] =
  44 {
  45   /* Operation modes. */
  46   {"help",              no_argument,    0, 'h'},
  47   {"version",           no_argument,    0, 'V'},
  48   {"yacc",              no_argument,    0, 'y'},
  49   {"fixed-output-files",no_argument,    0, 'y'},
  50
  51   /* Parser. */
  52   {"skeleton",          required_argument,      0, 'S'},
  53   {"debug",             no_argument,            0, 'd'},
  54   {"locations",         no_argument,    &locations_flag, 1},
  55   /* was 'a';  apparently unused -wjh */
  56   {"name-prefix",       required_argument,      0, 'p'},
  57   {"no-lines",          no_argument,            0, 'l'},
  58   {"no-parser",         no_argument,            0, 'n'},
  59   {"raw",               no_argument,            0, 'r'},
  60   {"token-table",       no_argument,            0, 'k'},
  61
  62   /* Output. */
  63   {"defines",           no_argument,            0, 'd'},
  64   {"verbose",           no_argument,            0, 'v'},
  65   {"file-prefix",       required_argument,      0, 'b'},
  66   {"output-file",       required_argument,      0, 'o'},
  67   {"graph",             no_argument,            0, 'g'},
  68
  69   /* Hidden. */
  70   {"statistics",        no_argument,    &statistics_flag, 1},
  71   {0, 0, 0, 0}
  72 };
  73
  74 /*---------------------------.
  75 | Display the help message.  |
  76 `---------------------------*/
  77
  78 static void
  79 usage (FILE *stream)
  80 {
  81   /* Some efforts were made to ease the translators' task, please
  82      continue.  */
  83   fputs (_("\
  84 GNU bison generates parsers for LALR(1) grammars.\n"), stream);
  85   putc ('\n', stream);
  86
  87   fprintf (stream, _("\
  88 Usage: %s [OPTION]... FILE\n"), program_name);
  89   putc ('\n', stream);
  90
  91   fputs (_("\
  92 If a long option shows an argument as mandatory, then it is mandatory\n\
  93 for the equivalent short option also.  Similarly for optional arguments.\n"),
  94          stream);
  95   putc ('\n', stream);
  96
  97   fputs (_("\
  98 Operation modes:\n\
  99   -h, --help      display this help and exit\n\
 100   -V, --version   output version information and exit\n\
 101   -y, --yacc      emulate POSIX yacc\n"), stream);
 102   putc ('\n', stream);
 103
 104   fputs (_("\
 105 Parser:\n\
 106   -S, --skeleton=FILE        specify the skeleton to use\n\
 107   -t, --debug                instrument the parser for debugging\n\
 108       --locations            enable locations computation\n\
 109   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
 110   -l, --no-lines             don't generate `#line' directives\n\
 111   -n, --no-parser            generate the tables only\n\
 112   -k, --token-table          include a table of token names\n\
 113 "), stream);
 114   putc ('\n', stream);
 115
 116   fputs (_("\
 117 Output:\n\
 118   -d, --defines              also produce a header file\n\
 119   -v, --verbose              also produce an explanation of the automaton\n\
 120   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 121   -o, --output-file=FILE     leave output to FILE\n\
 122   -g, --graph                also produce a VCG graph description of the \
 123 automaton\n"), stream);
 124   putc ('\n', stream);
 125
 126   fputs (_("\
 127 Report bugs to <bug-bison@gnu.org>.\n"), stream);
 128 }
 129
 130
 131 /*------------------------------.
 132 | Display the version message.  |
 133 `------------------------------*/
 134
 135 static void
 136 version (FILE *stream)
 137 {
 138   /* Some efforts were made to ease the translators' task, please
 139      continue.  */
 140   fprintf (stream, _("\
 141 bison (GNU Bison) %s"), VERSION);
 142   putc ('\n', stream);
 143   putc ('\n', stream);
 144
 145   fputs (_("\
 146 Copyright 1984, 1986, 1989, 1992, 2000, 2001 Free Software Foundation, Inc.\n"),
 147          stream);
 148
 149   fputs (_("\
 150 This is free software; see the source for copying conditions.  There is NO\n\
 151 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 152 "),
 153          stream);
 154 }
 155
 156
 157 /*----------------------.
 158 | Process the options.  |
 159 `----------------------*/
 160
 161 void
 162 getargs (int argc, char *argv[])
 163 {
 164   int c;
 165
 166   while ((c = getopt_long (argc, argv, shortopts, longopts, NULL)) != EOF)
 167     switch (c)
 168       {
 169       case 0:
 170         /* Certain long options cause getopt_long to return 0.  */
 171         break;
 172
 173       case 'y':
 174         yacc_flag = 1;
 175         break;
 176
 177       case 'h':
 178         usage (stdout);
 179         exit (0);
 180
 181       case 'V':
 182         version (stdout);
 183         exit (0);
 184
 185       case 'g':
 186         graph_flag = 1;
 187         break;
 188
 189       case 'v':
 190         verbose_flag = 1;
 191         break;
 192
 193       case 'S':
 194         skeleton = optarg;
 195         break;
 196
 197       case 'd':
 198         defines_flag = 1;
 199         break;
 200
 201       case 'l':
 202         no_lines_flag = 1;
 203         break;
 204
 205       case 'k':
 206         token_table_flag = 1;
 207         break;
 208
 209       case 'r':
 210         fatal (_("`%s' is no longer supported"), "--raw");
 211         break;
 212
 213       case 'n':
 214         no_parser_flag = 1;
 215         break;
 216
 217       case 't':
 218         debug_flag = 1;
 219         break;
 220
 221       case 'o':
 222         spec_outfile = optarg;
 223         break;
 224
 225       case 'b':
 226         spec_file_prefix = optarg;
 227         break;
 228
 229       case 'p':
 230         spec_name_prefix = optarg;
 231         break;
 232
 233       default:
 234         fprintf (stderr, _("Try `%s --help' for more information.\n"),
 235                  program_name);
 236         exit (1);
 237       }
 238
 239   if (optind == argc)
 240     {
 241       fprintf (stderr, _("%s: no grammar file given\n"), program_name);
 242       exit (1);
 243     }
 244   if (optind < argc - 1)
 245     fprintf (stderr, _("%s: extra arguments ignored after `%s'\n"),
 246              program_name, argv[optind]);
 247
 248   infile = argv[optind];
 249 }