1  /*
 2   * Copyright (c) 2013-2014 Apple Inc. All Rights Reserved.
 3   *
 4   * @APPLE_LICENSE_HEADER_START@
 5   * 
 6   * This file contains Original Code and/or Modifications of Original Code
 7   * as defined in and that are subject to the Apple Public Source License
 8   * Version 2.0 (the 'License'). You may not use this file except in
 9   * compliance with the License. Please obtain a copy of the License at
10   * http://www.opensource.apple.com/apsl/ and read it before using this
11   * file.
12   * 
13   * The Original Code and all software distributed under the License are
14   * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
15   * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
16   * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
17   * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
18   * Please see the License for the specific language governing rights and
19   * limitations under the License.
20   * 
21   * @APPLE_LICENSE_HEADER_END@
22   */
23  
24  
25  #import "NSString+compactDescription.h"
26  
27  @implementation NSString (compactDescription)
28  
29  -(NSString*)compactDescription
30  {
31  	static NSCharacterSet *forceQuotes = nil;
32  	static dispatch_once_t setup;
33  	dispatch_once(&setup, ^{
34  		forceQuotes = [NSCharacterSet characterSetWithCharactersInString:@"\"' \t\n\r="];
35  	});
36  	
37  	if ([self rangeOfCharacterFromSet:forceQuotes].location != NSNotFound) {
38  		NSString *escaped = [self stringByReplacingOccurrencesOfString:@"\\" withString:@"\\\\"];
39  		escaped = [escaped stringByReplacingOccurrencesOfString:@"\"" withString:@"\\\""];
40  		return [NSString stringWithFormat:@"\"%@\"", escaped];
41  	} else {
42  		return self;
43  	}
44  }
45  
46  @end