/* Parse command line arguments for bison.
   Copyright 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"
#include "getargs.h"

int debug_flag = 0;
int defines_flag = 0;
int locations_flag = 0;
int no_lines_flag = 0;
int no_parser_flag = 0;
int raw_flag = 0;
int token_table_flag = 0;
int verbose_flag = 0;
int statistics_flag = 0;
int yacc_flag = 0;	/* for -y */

extern char *program_name;
const char *shortopts = "yvdhrltknVo:b:p:";
static struct option longopts[] =
{
  /* Operation modes. */
  {"help",		no_argument,	0, 'h'},
  {"version",		no_argument, 	0, 'V'},
  {"yacc",		no_argument,	0, 'y'},
  {"fixed-output-files",no_argument,	0, 'y'},

  /* Parser. */
  {"locations",		no_argument, 	&locations_flag, 1},
  /* was 'a';  apparently unused -wjh */
  {"name-prefix",	required_argument, 	0, 'p'},
  {"no-lines",		no_argument,		0, 'l'},
  {"no-parser",		no_argument,		0, 'n'},
  {"raw",		no_argument,		0, 'r'},
  {"token-table",	no_argument,		0, 'k'},
  {"debug",		no_argument,		0, 'd'},

  /* Output. */
  {"defines",		no_argument,		0, 'd'},
  {"verbose",		no_argument,		0, 'v'},
  {"file-prefix",	required_argument, 	0, 'b'},
  {"output-file",	required_argument, 	0, 'o'},

  /* Hidden. */
  {"statistics",	no_argument, 	&statistics_flag, 1},
  {0, 0, 0, 0}
};

/*---------------------------.
| Display the help message.  |
`---------------------------*/

static 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\
      --locations            enable locations computation\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);
}


/*------------------------------.
| Display the version message.  |
`------------------------------*/

static void
version (FILE *stream)
{
  /* Some efforts were made to ease the translators' task, please
     continue.  */
  fprintf (stream, _("\
bison (GNU Bison) %s"), VERSION);
  putc ('\n', stream);
  putc ('\n', stream);

  fputs (_("\
Copyright 1984, 1986, 1989, 1992, 2000 Free Software Foundation, Inc.\n"),
	 stream);

  fputs (_("\
This is free software; see the source for copying conditions.  There is NO\n\
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
"),
	 stream);
}


/*----------------------.
| Process the options.  |
`----------------------*/

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

  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':
	  yacc_flag = 1;
	  break;

	case 'h':
	  usage (stdout);
	  exit (0);

	case 'V':
	  version (stdout);
	  exit (0);

	case 'v':
	  verbose_flag = 1;
	  break;

	case 'd':
	  defines_flag = 1;
	  break;

	case 'l':
	  no_lines_flag = 1;
	  break;

	case 'k':
	  token_table_flag = 1;
	  break;

	case 'r':
	  raw_flag = 1;
	  break;

	case 'n':
	  no_parser_flag = 1;
	  break;

	case 't':
	  debug_flag = 1;
	  break;

	case 'o':
	  spec_outfile = optarg;
	  break;

	case 'b':
	  spec_file_prefix = optarg;
	  break;

	case 'p':
	  spec_name_prefix = optarg;
	  break;

	default:
	  fprintf (stderr, _("Try `%s --help' for more information.\n"),
		   program_name);
	  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];
}