www.pudn.com > bison.zip > getargs.c

/* Parse command line arguments for bison, 
   Copyright (C) 1984, 1986, 1989 Free Software Foundation, Inc. 
 
This file is part of Bison, the GNU Compiler Compiler. 
 
Bison is free software; you can redistribute it and/or modify 
it under the terms of the GNU General Public License as published by 
the Free Software Foundation; either version 2, or (at your option) 
any later version. 
 
Bison is distributed in the hope that it will be useful, 
but WITHOUT ANY WARRANTY; without even the implied warranty of 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
GNU General Public License for more details. 
 
You should have received a copy of the GNU General Public License 
along with Bison; see the file COPYING.  If not, write to 
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */ 
 
 
#include  
#include "getopt.h" 
#include "system.h" 
#include "files.h" 
 
int verboseflag; 
int definesflag; 
int debugflag; 
int nolinesflag; 
char *spec_name_prefix; /* for -p.  */ 
char *spec_file_prefix; /* for -b. */ 
extern int fixed_outfiles;/* for -y */ 
 
extern char *program_name; 
extern char *version_string; 
 
extern void fatal(); 
 
struct option longopts[] = 
{ 
  {"debug", 0, &debugflag, 1}, 
  {"defines", 0, &definesflag, 1}, 
  {"file-prefix", 1, 0, 'b'}, 
  {"fixed-output-files", 0, &fixed_outfiles, 1}, 
  {"help", 0, 0, 'h'}, 
  {"name-prefix", 1, 0, 'a'}, 
  {"no-lines", 0, &nolinesflag, 1}, 
  {"output", 1, 0, 'o'}, 
  {"output-file", 1, 0, 'o'}, 
  {"verbose", 0, &verboseflag, 1}, 
  {"version", 0, 0, 'V'}, 
  {"yacc", 0, &fixed_outfiles, 1}, 
  {0, 0, 0, 0} 
}; 
 
void 
usage (stream) 
     FILE *stream; 
{ 
  fprintf (stream, "\ 
Usage: %s [-dhltvyV] [-b file-prefix] [-o outfile] [-p name-prefix]\n\ 
       [--debug] [--defines] [--fixed-output-files] [--no-lines]\n\ 
       [--verbose] [--version] [--help] [--yacc]\n\ 
       [--file-prefix=prefix] [--name-prefix=prefix]\n\ 
       [--output=outfile] grammar-file\n", 
	   program_name); 
} 
 
void 
getargs(argc, argv) 
     int argc; 
     char *argv[]; 
{ 
  register int c; 
 
  verboseflag = 0; 
  definesflag = 0; 
  debugflag = 0; 
  fixed_outfiles = 0; 
 
  while ((c = getopt_long (argc, argv, "yvdhltVo:b:p:", longopts, (int *)0)) 
	 != EOF) 
    { 
      switch (c) 
	{ 
	case 0: 
	  /* Certain long options cause getopt_long to return 0.  */ 
	  break; 
 
	case 'y': 
	  fixed_outfiles = 1; 
	  break; 
	   
	case 'h': 
	  usage (stdout); 
	  exit (0); 
 
	case 'V': 
	  printf ("%s", version_string); 
	  exit (0); 
	   
	case 'v': 
	  verboseflag = 1; 
	  break; 
	   
	case 'd': 
	  definesflag = 1; 
	  break; 
	   
	case 'l': 
	  nolinesflag = 1; 
	  break; 
	   
	case 't': 
	  debugflag = 1; 
	  break; 
	   
	case 'o': 
	  spec_outfile = optarg; 
	  break; 
	   
	case 'b': 
	  spec_file_prefix = optarg; 
	  break; 
	   
	case 'p': 
	  spec_name_prefix = optarg; 
	  break; 
	   
	default: 
	  usage (stderr); 
	  exit (1); 
	} 
    } 
 
  if (optind == argc) 
    { 
      fprintf(stderr, "%s: no grammar file given\n", program_name); 
      exit(1); 
    } 
  if (optind < argc - 1) 
    fprintf(stderr, "%s: warning: extra arguments ignored\n", program_name); 
 
  infile = argv[optind]; 
}