Clean the error reporting functions.

[bison.git] / src / getargs.c

/* Parse command line arguments for bison.
   Copyright (C) 1984, 1986, 1989, 1992, 2000 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, Inc., 59 Temple Place - Suite 330, Boston, MA
   02111-1307, USA.  */

#include <stdio.h>
#include "getopt.h"
#include "system.h"
#include "files.h"

int verboseflag;
int definesflag;
int debugflag;
int nolinesflag;
int noparserflag = 0;
int toknumflag = 0;
int rawtoknumflag = 0;
char *spec_name_prefix; /* for -p.  */
char *spec_file_prefix; /* for -b. */
extern int fixed_outfiles;/* for -y */

extern char *program_name;

extern void warns PARAMS((char *, char *));	/* main.c */

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, 'p'}, /* was 'a';  apparently unused -wjh */
  {"no-lines", 0, &nolinesflag, 1},
  {"no-parser", 0, &noparserflag, 1},
  {"output", 1, 0, 'o'},
  {"output-file", 1, 0, 'o'},
  {"raw", 0, &rawtoknumflag, 1},
  {"token-table", 0, &toknumflag, 1},
  {"verbose", 0, &verboseflag, 1},
  {"version", 0, 0, 'V'},
  {"yacc", 0, &fixed_outfiles, 1},
  {0, 0, 0, 0}
};

/*---------------------------.
| Display the help message.  |
`---------------------------*/
void
usage (FILE *stream)
{
  /* Some efforts were made to ease the translators' task, please
     continue.  */
  fputs (_("\
GNU bison generates parsers for LALR(1) grammars.\n"), stream);
  putc ('\n', stream);

  fprintf (stream, _("\
Usage: %s [OPTION]... FILE\n"), program_name);
  putc ('\n', stream);

  fputs (_("\
If a long option shows an argument as mandatory, then it is mandatory\n\
for the equivalent short option also.  Similarly for optional arguments.\n"),
	 stream);
  putc ('\n', stream);

  fputs (_("\
Operation modes:\n\
  -h, --help      display this help and exit\n\
  -V, --version   output version information and exit\n\
  -y, --yacc      emulate POSIX yacc\n"), stream);
  putc ('\n', stream);

  fputs (_("\
Parser:\n\
  -t, --debug                instrument the parser for debugging\n\
  -p, --name-prefix=PREFIX   prepend PREFIX to the external symbols\n\
  -l, --no-lines             don't generate `#line' directives\n\
  -n, --no-parser            generate the tables only\n\
  -r, --raw                  number the tokens from 3\n\
  -k, --token-table          include a table of token names\n\
"), stream);
  putc ('\n', stream);

  fputs (_("\
Output:\n\
  -d, --defines              also produce a header file\n\
  -v, --verbose              also produce an explanation of the automaton\n\
  -b, --file-prefix=PREFIX   specify a PREFIX for output files\n\
  -o, --output-file=FILE     leave output to FILE\n"), stream);
  putc ('\n', stream);

  fputs (_("\
Report bugs to <bug-bison@gnu.org>.\n"), stream);
}

void
getargs (int argc, char *argv[])
{
  register int c;

  verboseflag = 0;
  definesflag = 0;
  debugflag = 0;
  noparserflag = 0;
  rawtoknumflag = 0;
  toknumflag = 0;
  fixed_outfiles = 0;

  while ((c = getopt_long (argc, argv, "yvdhrltknVo: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\n", VERSION_STRING);
	  exit (0);

	case 'v':
	  verboseflag = 1;
	  break;

	case 'd':
	  definesflag = 1;
	  break;

	case 'l':
	  nolinesflag = 1;
	  break;

	case 'k':
	  toknumflag = 1;
	  break;

	case 'r':
	  rawtoknumflag = 1;
	  break;

	case 'n':
	  noparserflag = 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: extra arguments ignored after `%s'\n"),
	    program_name, argv[optind]);

  infile = argv[optind];
}