/*
 * Copyright (c) 2009 Lukas Mejdrech
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup net_app
 *  @{
 */

/** @file
 *  Generic application parsing functions implementation.
 */

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

#include "../err.h"

#include "parse.h"

int parse_parameter_int( int argc, char ** argv, int * index, int * value, const char * name, int offset ){
	char *	rest;

	if( offset ){
		* value = strtol( argv[ * index ] + offset, & rest, 10 );
	}else if(( * index ) + 1 < argc ){
		++ ( * index );
		* value = strtol( argv[ * index ], & rest, 10 );
	}else{
		fprintf( stderr, "Command line error: missing %s\n", name );
		return EINVAL;
	}
	if( rest && ( * rest )){
		fprintf( stderr, "Command line error: %s unrecognized (%d: %s)\n", name, * index, argv[ * index ] );
		return EINVAL;
	}
	return EOK;
}

int parse_parameter_string( int argc, char ** argv, int * index, char ** value, const char * name, int offset ){
	if( offset ){
		* value = argv[ * index ] + offset;
	}else if(( * index ) + 1 < argc ){
		++ ( * index );
		* value = argv[ * index ];
	}else{
		fprintf( stderr, "Command line error: missing %s\n", name );
		return EINVAL;
	}
	return EOK;
}

int parse_parameter_name_int( int argc, char ** argv, int * index, int * value, const char * name, int offset, int ( * parse_value )( const char * value )){
	ERROR_DECLARE;

	char *	parameter;

	ERROR_PROPAGATE( parse_parameter_string( argc, argv, index, & parameter, name, offset ));
	* value = ( * parse_value )( parameter );
	if(( * value ) == ENOENT ){
		fprintf( stderr, "Command line error: unrecognized %s value (%d: %s)\n", name, * index, parameter );
		return ENOENT;
	}
	return EOK;
}

void print_unrecognized( int index, const char * parameter ){
	fprintf( stderr, "Command line error - unrecognized parameter (%d: %s)\n", index, parameter );
}

/** @}
 */