src/getargs.c

   1 /* Parse command line arguments for bison,
   2    Copyright (C) 1984, 1986, 1989 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
   7 it 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,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU 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
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  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 char *spec_name_prefix; /* for -p.  */
  31 char *spec_file_prefix; /* for -b. */
  32 extern int fixed_outfiles;/* for -y */
  33
  34 extern char *program_name;
  35 extern char *version_string;
  36
  37 extern void fatal();
  38
  39 struct option longopts[] =
  40 {
  41   {"debug", 0, &debugflag, 1},
  42   {"defines", 0, &definesflag, 1},
  43   {"file-prefix", 1, 0, 'b'},
  44   {"fixed-output-files", 0, &fixed_outfiles, 1},
  45   {"help", 0, 0, 'h'},
  46   {"name-prefix", 1, 0, 'a'},
  47   {"no-lines", 0, &nolinesflag, 1},
  48   {"output", 1, 0, 'o'},
  49   {"output-file", 1, 0, 'o'},
  50   {"verbose", 0, &verboseflag, 1},
  51   {"version", 0, 0, 'V'},
  52   {"yacc", 0, &fixed_outfiles, 1},
  53   {0, 0, 0, 0}
  54 };
  55
  56 void
  57 usage (stream)
  58      FILE *stream;
  59 {
  60   fprintf (stream, "\
  61 Usage: %s [-dhltvyV] [-b file-prefix] [-o outfile] [-p name-prefix]\n\
  62        [--debug] [--defines] [--fixed-output-files] [--no-lines]\n\
  63        [--verbose] [--version] [--help] [--yacc]\n\
  64        [--file-prefix=prefix] [--name-prefix=prefix]\n\
  65        [--output=outfile] grammar-file\n",
  66            program_name);
  67 }
  68
  69 void
  70 getargs(argc, argv)
  71      int argc;
  72      char *argv[];
  73 {
  74   register int c;
  75
  76   verboseflag = 0;
  77   definesflag = 0;
  78   debugflag = 0;
  79   fixed_outfiles = 0;
  80
  81   while ((c = getopt_long (argc, argv, "yvdhltVo:b:p:", longopts, (int *)0))
  82          != EOF)
  83     {
  84       switch (c)
  85         {
  86         case 0:
  87           /* Certain long options cause getopt_long to return 0.  */
  88           break;
  89
  90         case 'y':
  91           fixed_outfiles = 1;
  92           break;
  93
  94         case 'h':
  95           usage (stdout);
  96           exit (0);
  97
  98         case 'V':
  99           printf ("%s", version_string);
 100           exit (0);
 101
 102         case 'v':
 103           verboseflag = 1;
 104           break;
 105
 106         case 'd':
 107           definesflag = 1;
 108           break;
 109
 110         case 'l':
 111           nolinesflag = 1;
 112           break;
 113
 114         case 't':
 115           debugflag = 1;
 116           break;
 117
 118         case 'o':
 119           spec_outfile = optarg;
 120           break;
 121
 122         case 'b':
 123           spec_file_prefix = optarg;
 124           break;
 125
 126         case 'p':
 127           spec_name_prefix = optarg;
 128           break;
 129
 130         default:
 131           usage (stderr);
 132           exit (1);
 133         }
 134     }
 135
 136   if (optind == argc)
 137     {
 138       fprintf(stderr, "%s: no grammar file given\n", program_name);
 139       exit(1);
 140     }
 141   if (optind < argc - 1)
 142     fprintf(stderr, "%s: warning: extra arguments ignored\n", program_name);
 143
 144   infile = argv[optind];
 145 }