1 files changed, 48 insertions, 0 deletions
diff --git a/Foundation/GTMNSString+Replace.m b/Foundation/GTMNSString+Replace.m
new file mode 100644
index 0000000..4e8195c
--- /dev/null
+++ b/Foundation/GTMNSString+Replace.m
@@ -0,0 +1,48 @@
+//
+//  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)
+
+- (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;
+}
+
+@end