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 yacc_flag = 0;      /* for -y */
  36 int graph_flag = 0;
  37 int trace_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, 't'},
  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",           optional_argument,      0, 'd'},
  64   {"verbose",           no_argument,            0, 'v'},
  65   {"file-prefix",       required_argument,      0, 'b'},
  66   {"output",            required_argument,      0, 'o'},
  67   {"output-file",       required_argument,      0, 'o'},
  68   {"graph",             optional_argument,      0, 'g'},
  69
  70   /* Hidden. */
  71   {"trace",             no_argument,    &trace_flag, 1},
  72   {0, 0, 0, 0}
  73 };
  74
  75 /*---------------------------.
  76 | Display the help message.  |
  77 `---------------------------*/
  78
  79 static void
  80 usage (FILE *stream)
  81 {
  82   /* Some efforts were made to ease the translators' task, please
  83      continue.  */
  84   fputs (_("\
  85 GNU bison generates parsers for LALR(1) grammars.\n"), stream);
  86   putc ('\n', stream);
  87
  88   fprintf (stream, _("\
  89 Usage: %s [OPTION]... FILE\n"), program_name);
  90   putc ('\n', stream);
  91
  92   fputs (_("\
  93 If a long option shows an argument as mandatory, then it is mandatory\n\
  94 for the equivalent short option also.  Similarly for optional arguments.\n"),
  95          stream);
  96   putc ('\n', stream);
  97
  98   fputs (_("\
  99 Operation modes:\n\
 100   -h, --help      display this help and exit\n\
 101   -V, --version   output version information and exit\n\
 102   -y, --yacc      emulate POSIX yacc\n"), stream);
 103   putc ('\n', stream);
 104
 105   fputs (_("\
 106 Parser:\n\
 107   -S, --skeleton=FILE        specify the skeleton to use\n\
 108   -t, --debug                instrument the parser for debugging\n\
 109       --locations            enable locations computation\n\
 110   -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
 111   -l, --no-lines             don't generate `#line' directives\n\
 112   -n, --no-parser            generate the tables only\n\
 113   -k, --token-table          include a table of token names\n\
 114 "), stream);
 115   putc ('\n', stream);
 116
 117   fputs (_("\
 118 Output:\n\
 119   -d, --defines              also produce a header file\n\
 120   -v, --verbose              also produce an explanation of the automaton\n\
 121   -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
 122   -o, --output=FILE          leave output to FILE\n\
 123   -g, --graph                also produce a VCG description of the automaton\n\
 124 "), stream);
 125   putc ('\n', stream);
 126
 127   fputs (_("\
 128 Report bugs to <bug-bison@gnu.org>.\n"), stream);
 129 }
 130
 131
 132 /*------------------------------.
 133 | Display the version message.  |
 134 `------------------------------*/
 135
 136 static void
 137 version (FILE *stream)
 138 {
 139   /* Some efforts were made to ease the translators' task, please
 140      continue.  */
 141   fprintf (stream, _("\
 142 bison (GNU Bison) %s"), VERSION);
 143   putc ('\n', stream);
 144   putc ('\n', stream);
 145
 146   fputs (_("\
 147 Copyright 1984, 1986, 1989, 1992, 2000, 2001, 2002\n\
 148 Free Software Foundation, Inc.\n"),
 149          stream);
 150
 151   fputs (_("\
 152 This is free software; see the source for copying conditions.  There is NO\n\
 153 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
 154 "),
 155          stream);
 156 }
 157
 158
 159 /*----------------------.
 160 | Process the options.  |
 161 `----------------------*/
 162
 163 /* Under DOS, there is no difference on the case.  This can be
 164    troublesome when looking for `.tab' etc.  */
 165 #ifdef MSDOS
 166 # define AS_FILE_NAME(File) (strlwr (File), (File))
 167 #else
 168 # define AS_FILE_NAME(File) (File)
 169 #endif
 170
 171 void
 172 getargs (int argc, char *argv[])
 173 {
 174   int c;
 175
 176   while ((c = getopt_long (argc, argv, shortopts, longopts, NULL)) != EOF)
 177     switch (c)
 178       {
 179       case 0:
 180         /* Certain long options cause getopt_long to return 0.  */
 181         break;
 182
 183       case 'y':
 184         yacc_flag = 1;
 185         break;
 186
 187       case 'h':
 188         usage (stdout);
 189         exit (0);
 190
 191       case 'V':
 192         version (stdout);
 193         exit (0);
 194
 195       case 'g':
 196         /* Here, the -g and --graph=FILE options are differentiated.  */
 197         graph_flag = 1;
 198         spec_graph_file = AS_FILE_NAME (optarg);
 199         break;
 200
 201       case 'v':
 202         verbose_flag = 1;
 203         break;
 204
 205       case 'S':
 206         skeleton = AS_FILE_NAME (optarg);
 207         break;
 208
 209       case 'd':
 210         /* Here, the -d and --defines options are differentiated.  */
 211         defines_flag = 1;
 212         spec_defines_file = AS_FILE_NAME (optarg);
 213         break;
 214
 215       case 'l':
 216         no_lines_flag = 1;
 217         break;
 218
 219       case 'k':
 220         token_table_flag = 1;
 221         break;
 222
 223       case 'r':
 224         fatal (_("`%s' is no longer supported"), "--raw");
 225         break;
 226
 227       case 'n':
 228         no_parser_flag = 1;
 229         break;
 230
 231       case 't':
 232         debug_flag = 1;
 233         break;
 234
 235       case 'o':
 236         spec_outfile = AS_FILE_NAME (optarg);
 237         break;
 238
 239       case 'b':
 240         spec_file_prefix = AS_FILE_NAME (optarg);
 241         break;
 242
 243       case 'p':
 244         spec_name_prefix = optarg;
 245         break;
 246
 247       default:
 248         fprintf (stderr, _("Try `%s --help' for more information.\n"),
 249                  program_name);
 250         exit (1);
 251       }
 252
 253   if (optind == argc)
 254     {
 255       fprintf (stderr, _("%s: no grammar file given\n"), program_name);
 256       exit (1);
 257     }
 258   if (optind < argc - 1)
 259     fprintf (stderr, _("%s: extra arguments ignored after `%s'\n"),
 260              program_name, argv[optind]);
 261
 262   infile = argv[optind];
 263 }