root/Spiral/trunk/NSString-SPAdditions.m

/* $Id$ */

/*
 *  Copyright (c) 2007 Axel Andersson
 *  All rights reserved.
 * 
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *  1. Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *  2. 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.
 * 
 * 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.
 */

#import "NSString-SPAdditions.h"

@implementation NSMutableString(SPStringAdditions)

- (void)removeSubstringWithStartString:(NSString *)startString endString:(NSString *)endString {
        NSRange         searchRange, range, removeRange;
        NSUInteger      location;
        
        searchRange = NSMakeRange(0, [self length]);
        
        while((location = [self rangeOfString:startString options:0 range:searchRange].location) != NSNotFound &&
                  location != [self length] - [startString length]) {
                searchRange.location = location + [startString length];
                searchRange.length = [self length] - searchRange.location;
                
                range = [self rangeOfString:endString options:0 range:searchRange];
                
                if(range.location != NSNotFound) {
                        removeRange = NSMakeRange(location, range.location - location + [endString length]);
                        
                        [self deleteCharactersInRange:removeRange];
                        
                        searchRange.location = range.location - removeRange.length + 1;
                        searchRange.length = [self length] - searchRange.location;
                }
        }
}

@end