www.pudn.com > os_source.zip > CMDL_ARG.CPP

/* 
	FIPS - the First nondestructive Interactive Partition Splitting program 
 
	Module cmdl_arg.cpp 
 
	RCS - Header: 
	$Header: c:/daten/fips/source/main/RCS/cmdl_arg.cpp 1.4 1995/01/19 00:00:51 schaefer Exp schaefer $ 
 
	Copyright (C) 1993 Arno Schaefer 
 
	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., 675 Mass Ave, Cambridge, MA 02139, USA. 
 
 
	Report problems and direct all questions to: 
 
	schaefer@rbg.informatik.th-darmstadt.de 
*/ 
 
#include  
#include  
#include  
#include  
 
#include "global.h" 
#include "getopt.h" 
 
 
/* ----------------------------------------------------------------------- */ 
/* Replacement for atoi                                                    */ 
/* ----------------------------------------------------------------------- */ 
 
static int atoint (char *string) 
{ 
	long int value = 0; 
	while (isdigit (*string)) 
	{ 
		value = value * 10 + (*string - '0'); 
		if (value > 32767) return (-1); 
		string++; 
	} 
	if (*string != '\0') return (-1); 
	return (int) value; 
} 
 
 
/* ----------------------------------------------------------------------- */ 
/* Usage instructions                                                      */ 
/* ----------------------------------------------------------------------- */ 
 
static void usage (void) 
{ 
	printf ("\nFIPS [-t] [-d] [-h|-?] [-n]:\n\n"); 
	printf ("-t        : test mode (no writes to disk)\n"); 
	printf ("-d        : debug mode\n"); 
	printf ("-h/-?     : this help page\n"); 
	printf ("-n   : select drive  - valid values: 128 to 255\n"); 
} 
 
 
/* ----------------------------------------------------------------------- */ 
/* Process commandline parameters                                          */ 
/* ----------------------------------------------------------------------- */ 
 
void evaluate_argument_vector (int argc, char *argv[]) 
{ 
	int c; 
 
	opterr = 0; 
 
	while ((c = getopt (argc, argv, ":htdn:")) >= 0) 
	{ 
		switch (c) 
		{ 
			case 't': 
				global.test_mode = true; 
				break; 
			case 'd': 
				global.debug_mode = true; 
				break; 
			case 'h': 
				usage (); 
				exit (1); 
			case 'n': 
				global.drive_number_cmdline = atoint (optarg); 
 
				if 
				( 
					global.drive_number_cmdline < 0x80 
					|| global.drive_number_cmdline > 0xff 
				) 
				{ 
					fprintf 
					( 
						stderr, 
						"\nInvalid argument: %s\n", 
						optarg 
					); 
 
					usage (); 
					exit (-1); 
				} 
				break; 
			case ':': 
				fprintf 
				( 
					stderr, 
					"\nSwitch %c requires an argument\n", 
					optopt 
				); 
				usage (); 
				exit (-1); 
			case '?': 
				if (optopt != '?') 
					fprintf 
					( 
						stderr, 
						"\nInvalid Commandline Parameter: %s\n", 
						argv[optind - 1] 
					); 
 
				usage (); 
				exit (-1); 
		} /* switch */ 
 
	} /* while */ 
}