/* clopts_common.c
 * Handle command-line arguments common to Ethereal and Tethereal
 *
 * $Id$
 *
 * Ethereal - Network traffic analyzer
 * By Gerald Combs <gerald@ethereal.com>
 * Copyright 1998 Gerald Combs
 *
 * This program 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
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <stdio.h>
#include <string.h>

#include <epan/proto.h>
#include <epan/packet.h>
#include <epan/prefs.h>

#include "clopts_common.h"

/*
 * Handle the "-G" option, to cause protocol field, etc. information
 * to be printed.
 */
void
handle_dashG_option(int argc, char **argv, const char *progname)
{
  char *gpf_path, *pf_path;
  int   gpf_open_errno, gpf_read_errno;
  int   pf_open_errno, pf_read_errno;

  if (argc >= 2 && strcmp(argv[1], "-G") == 0) {
    if (argc == 2)
      proto_registrar_dump_fields(1);
    else {
      if (strcmp(argv[2], "fields") == 0)
        proto_registrar_dump_fields(1);
      else if (strcmp(argv[2], "fields2") == 0)
        proto_registrar_dump_fields(2);
      else if (strcmp(argv[2], "fields3") == 0)
        proto_registrar_dump_fields(3);
      else if (strcmp(argv[2], "protocols") == 0)
        proto_registrar_dump_protocols();
      else if (strcmp(argv[2], "values") == 0)
        proto_registrar_dump_values();
      else if (strcmp(argv[2], "decodes") == 0)
        dissector_dump_decodes();
      else if (strcmp(argv[2], "defaultprefs") == 0)
        write_prefs(NULL);
      else if (strcmp(argv[2], "currentprefs") == 0) {
        read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path,
            &pf_open_errno, &pf_read_errno, &pf_path);
        write_prefs(NULL);
      } else {
        fprintf(stderr, "%s: Invalid \"%s\" option for -G flag\n", progname,
                argv[2]);
        exit(1);
      }
    }
    exit(0);
  }
}

int
get_natural_int(const char *appname, const char *string, const char *name)
{
  long number;
  char *p;

  number = strtol(string, &p, 10);
  if (p == string || *p != '\0') {
    fprintf(stderr, "%s: The specified %s \"%s\" isn't a decimal number\n",
	    appname, name, string);
    exit(1);
  }
  if (number < 0) {
    fprintf(stderr, "%s: The specified %s \"%s\" is a negative number\n",
	    appname, name, string);
    exit(1);
  }
  if (number > INT_MAX) {
    fprintf(stderr, "%s: The specified %s \"%s\" is too large (greater than %d)\n",
	    appname, name, string, INT_MAX);
    exit(1);
  }
  return number;
}


int
get_positive_int(const char *appname, const char *string, const char *name)
{
  long number;

  number = get_natural_int(appname, string, name);

  if (number == 0) {
    fprintf(stderr, "%s: The specified %s is zero\n",
	    appname, name);
    exit(1);
  }

  return number;
}