/core/externals/google-toolbox-for-mac/Foundation/GTMNSString+Replace.m
http://macfuse.googlecode.com/ · Objective C · 53 lines · 18 code · 9 blank · 26 comment · 2 complexity · 559a1818976c6a63099fc17541d4b0ed MD5 · raw file
- //
- // GTMNSString+Replace.m
- //
- // Copyright 2006-2008 Google Inc.
- //
- // Licensed under the Apache License, Version 2.0 (the "License"); you may not
- // use this file except in compliance with the License. You may obtain a copy
- // of the License at
- //
- // http://www.apache.org/licenses/LICENSE-2.0
- //
- // Unless required by applicable law or agreed to in writing, software
- // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- // License for the specific language governing permissions and limitations under
- // the License.
- //
- #import "GTMNSString+Replace.h"
- @implementation NSString (GTMStringReplaceAdditions)
- #if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5
- // 10.5 has stringByReplacingOccurrencesOfString:withString:, use that directly.
- - (NSString *)gtm_stringByReplacingString:(NSString *)target
- withString:(NSString *)replacement {
- // If |target| was nil, then do nothing and return |self|
- //
- // We do the retain+autorelease dance here because of this use case:
- // NSString *s1 = [[NSString alloc] init...];
- // NSString *s2 = [s1 stringByReplacingString:@"foo" withString:@"bar"];
- // [s1 release]; // |s2| still needs to be valid after this line
- if (!target)
- return [[self retain] autorelease];
-
- // If |replacement| is nil we want it to be treated as if @"" was specified
- // ... effectively removing |target| from self
- if (!replacement)
- replacement = @"";
-
- NSMutableString *result = [[self mutableCopy] autorelease];
- [result replaceOccurrencesOfString:target
- withString:replacement
- options:0
- range:NSMakeRange(0, [result length])];
- return result;
- }
- #endif // MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5
- @end