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 void fatal();
  35
  36 struct option longopts[] =
  37 {
  38   {"debug", 0, &debugflag, 1},
  39   {"defines", 0, &definesflag, 1},
  40   {"file-prefix", 1, 0, 'b'},
  41   {"fixed-output-files", 0, &fixed_outfiles, 1},
  42   {"name-prefix", 1, 0, 'a'},
  43   {"no-lines", 0, &nolinesflag, 1},
  44   {"output", 1, 0, 'o'},
  45   {"output-file", 1, 0, 'o'},
  46   {"verbose", 0, &verboseflag, 1},
  47   {"version", 0, 0, 'V'},
  48   {"yacc", 0, &fixed_outfiles, 1},
  49   {0, 0, 0, 0}
  50 };
  51
  52 void
  53 getargs(argc, argv)
  54      int argc;
  55      char *argv[];
  56 {
  57   register int c;
  58   int longind;
  59   extern char *program_name;
  60   extern char *version_string;
  61
  62   verboseflag = 0;
  63   definesflag = 0;
  64   debugflag = 0;
  65   fixed_outfiles = 0;
  66
  67   while ((c = getopt_long (argc, argv, "yvdltVo:b:p:", longopts, &longind))
  68          != EOF)
  69     {
  70       if (c == 0 && longopts[longind].flag == 0)
  71         c = longopts[longind].val;
  72       switch (c)
  73         {
  74         case 0:
  75           /* Certain long options cause getopt_long to return 0.  */
  76           break;
  77
  78         case 'y':
  79           fixed_outfiles = 1;
  80           break;
  81
  82         case 'V':
  83           printf("%s", version_string);
  84           break;
  85
  86         case 'v':
  87           verboseflag = 1;
  88           break;
  89
  90         case 'd':
  91           definesflag = 1;
  92           break;
  93
  94         case 'l':
  95           nolinesflag = 1;
  96           break;
  97
  98         case 't':
  99           debugflag = 1;
 100           break;
 101
 102         case 'o':
 103           spec_outfile = optarg;
 104           break;
 105
 106         case 'b':
 107           spec_file_prefix = optarg;
 108           break;
 109
 110         case 'p':
 111           spec_name_prefix = optarg;
 112           break;
 113
 114         default:
 115           fprintf (stderr, "\
 116 Usage: %s [-dltvyV] [-b file-prefix] [-o outfile] [-p name-prefix]\n\
 117        [--debug] [--defines] [--fixed-output-files] [--no-lines]\n\
 118        [--verbose] [--version] [--yacc]\n\
 119        [--file-prefix=prefix] [--name-prefix=prefix]\n\
 120        [--output=outfile] grammar-file\n",
 121                    program_name);
 122           exit (1);
 123         }
 124     }
 125
 126   if (optind == argc)
 127     {
 128       fprintf(stderr, "%s: no grammar file given\n", program_name);
 129       exit(1);
 130     }
 131   if (optind < argc - 1)
 132     fprintf(stderr, "%s: warning: extra arguments ignored\n", program_name);
 133
 134   infile = argv[optind];
 135 }