src/getargs.c

   1 /* Parse command line arguments for bison.
   2    Copyright 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 #include "getargs.h"
  26
  27 int debug_flag = 0;
  28 int defines_flag = 0;
  29 int locations_flag = 0;
  30 int no_lines_flag = 0;
  31 int no_parser_flag = 0;
  32 int raw_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
  38 extern char *program_name;
  39 const char *shortopts = "yvdhrltknVo:b:p:";
  40 static struct option longopts[] =
  41 {
  42   /* Operation modes. */
  43   {"help",              no_argument,    0, 'h'},
  44   {"version",           no_argument,    0, 'V'},
  45   {"yacc",              no_argument,    0, 'y'},
  46   {"fixed-output-files",no_argument,    0, 'y'},
  47
  48   /* Parser. */
  49   {"locations",         no_argument,    &locations_flag, 1},
  50   /* was 'a';  apparently unused -wjh */
  51   {"name-prefix",       required_argument,      0, 'p'},
  52   {"no-lines",          no_argument,            0, 'l'},
  53   {"no-parser",         no_argument,            0, 'n'},
  54   {"raw",               no_argument,            0, 'r'},
  55   {"token-table",       no_argument,            0, 'k'},
  56   {"debug",             no_argument,            0, 'd'},
  57
  58   /* Output. */
  59   {"defines",           no_argument,            0, 'd'},
  60   {"verbose",           no_argument,            0, 'v'},
  61   {"file-prefix",       required_argument,      0, 'b'},
  62   {"output-file",       required_argument,      0, 'o'},
  63
  64   /* Hidden. */
  65   {"statistics",        no_argument,    &statistics_flag, 1},
  66   {0, 0, 0, 0}
  67 };
  68
  69 /*---------------------------.
  70 | Display the help message.  |
  71 `---------------------------*/
  72
  73 static void
  74 usage (FILE *stream)
  75 {
  76   /* Some efforts were made to ease the translators' task, please
  77      continue.  */
  78   fputs (_("\
  79 GNU bison generates parsers for LALR(1) grammars.\n"), stream);
  80   putc ('\n', stream);
  81
  82   fprintf (stream, _("\
  83 Usage: %s [OPTION]... FILE\n"), program_name);
  84   putc ('\n', stream);
  85
  86   fputs (_("\
  87 If a long option shows an argument as mandatory, then it is mandatory\n\
  88 for the equivalent short option also.  Similarly for optional arguments.\n"),
  89          stream);
  90   putc ('\n', stream);
  91
  92   fputs (_("\
  93 Operation modes:\n\
  94   -h, --help      display this help and exit\n\
  95   -V, --version   output version information and exit\n\
  96   -y, --yacc      emulate POSIX yacc\n"), stream);
  97   putc ('\n', stream);
  98
  99   fputs (_("\
 100 Parser:\n\
 101   -t, --debug                instrument the parser for debugging\n\
 102       --locations            enable locations computation\n\
 103   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
 104   -l, --no-lines             don't generate `#line' directives\n\
 105   -n, --no-parser            generate the tables only\n\
 106   -r, --raw                  number the tokens from 3\n\
 107   -k, --token-table          include a table of token names\n\
 108 "), stream);
 109   putc ('\n', stream);
 110
 111   fputs (_("\
 112 Output:\n\
 113   -d, --defines              also produce a header file\n\
 114   -v, --verbose              also produce an explanation of the automaton\n\
 115   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 116   -o, --output-file=FILE     leave output to FILE\n"), stream);
 117   putc ('\n', stream);
 118
 119   fputs (_("\
 120 Report bugs to <bug-bison@gnu.org>.\n"), stream);
 121 }
 122
 123
 124 /*------------------------------.
 125 | Display the version message.  |
 126 `------------------------------*/
 127
 128 static void
 129 version (FILE *stream)
 130 {
 131   /* Some efforts were made to ease the translators' task, please
 132      continue.  */
 133   fprintf (stream, _("\
 134 bison (GNU Bison) %s"), VERSION);
 135   putc ('\n', stream);
 136   putc ('\n', stream);
 137
 138   fputs (_("\
 139 Copyright 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc.\n"),
 140          stream);
 141
 142   fputs (_("\
 143 This is free software; see the source for copying conditions.  There is NO\n\
 144 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 145 "),
 146          stream);
 147 }
 148
 149
 150 /*----------------------.
 151 | Process the options.  |
 152 `----------------------*/
 153
 154 void
 155 getargs (int argc, char *argv[])
 156 {
 157   int c;
 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           yacc_flag = 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           verbose_flag = 1;
 182           break;
 183
 184         case 'd':
 185           defines_flag = 1;
 186           break;
 187
 188         case 'l':
 189           no_lines_flag = 1;
 190           break;
 191
 192         case 'k':
 193           token_table_flag = 1;
 194           break;
 195
 196         case 'r':
 197           raw_flag = 1;
 198           break;
 199
 200         case 'n':
 201           no_parser_flag = 1;
 202           break;
 203
 204         case 't':
 205           debug_flag = 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           fprintf (stderr, _("Try `%s --help' for more information.\n"),
 222                    program_name);
 223           exit (1);
 224         }
 225     }
 226
 227   if (optind == argc)
 228     {
 229       fprintf (stderr, _("%s: no grammar file given\n"), program_name);
 230       exit (1);
 231     }
 232   if (optind < argc - 1)
 233     fprintf (stderr, _("%s: extra arguments ignored after `%s'\n"),
 234              program_name, argv[optind]);
 235
 236   infile = argv[optind];
 237 }