Squashed 'third_party/protobuf/' content from commit e35e248
Change-Id: I6cbe123d09fe50fdcad0e51466665daeee7433c7
git-subtree-dir: third_party/protobuf
git-subtree-split: e35e24800fb8d694bdeea5fd63dc7d1b14d68723
diff --git a/objectivec/GPBExtensionRegistry.m b/objectivec/GPBExtensionRegistry.m
new file mode 100644
index 0000000..df61a17
--- /dev/null
+++ b/objectivec/GPBExtensionRegistry.m
@@ -0,0 +1,108 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc. All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// 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.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "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 COPYRIGHT
+// OWNER OR CONTRIBUTORS 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 "GPBExtensionRegistry.h"
+
+#import "GPBBootstrap.h"
+#import "GPBDescriptor.h"
+
+@implementation GPBExtensionRegistry {
+ // TODO(dmaclach): Reimplement with CFDictionaries that don't use
+ // objects as keys.
+ NSMutableDictionary *mutableClassMap_;
+}
+
+- (instancetype)init {
+ if ((self = [super init])) {
+ mutableClassMap_ = [[NSMutableDictionary alloc] init];
+ }
+ return self;
+}
+
+- (void)dealloc {
+ [mutableClassMap_ release];
+ [super dealloc];
+}
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+ GPBExtensionRegistry *result = [[[self class] allocWithZone:zone] init];
+ if (result && mutableClassMap_.count) {
+ [result->mutableClassMap_ addEntriesFromDictionary:mutableClassMap_];
+ }
+ return result;
+}
+
+- (NSMutableDictionary *)extensionMapForContainingMessageClass:
+ (Class)containingMessageClass {
+ NSMutableDictionary *extensionMap =
+ [mutableClassMap_ objectForKey:containingMessageClass];
+ if (extensionMap == nil) {
+ extensionMap = [NSMutableDictionary dictionary];
+ [mutableClassMap_ setObject:extensionMap
+ forKey:(id<NSCopying>)containingMessageClass];
+ }
+ return extensionMap;
+}
+
+- (void)addExtension:(GPBExtensionDescriptor *)extension {
+ if (extension == nil) {
+ return;
+ }
+
+ Class containingMessageClass = extension.containingMessageClass;
+ NSMutableDictionary *extensionMap =
+ [self extensionMapForContainingMessageClass:containingMessageClass];
+ [extensionMap setObject:extension forKey:@(extension.fieldNumber)];
+}
+
+- (GPBExtensionDescriptor *)extensionForDescriptor:(GPBDescriptor *)descriptor
+ fieldNumber:(NSInteger)fieldNumber {
+ Class messageClass = descriptor.messageClass;
+ NSDictionary *extensionMap =
+ [mutableClassMap_ objectForKey:messageClass];
+ return [extensionMap objectForKey:@(fieldNumber)];
+}
+
+- (void)addExtensions:(GPBExtensionRegistry *)registry {
+ if (registry == nil) {
+ // In the case where there are no extensions just ignore.
+ return;
+ }
+ NSMutableDictionary *otherClassMap = registry->mutableClassMap_;
+ for (Class containingMessageClass in otherClassMap) {
+ NSMutableDictionary *extensionMap =
+ [self extensionMapForContainingMessageClass:containingMessageClass];
+ NSMutableDictionary *otherExtensionMap =
+ [registry extensionMapForContainingMessageClass:containingMessageClass];
+ [extensionMap addEntriesFromDictionary:otherExtensionMap];
+ }
+}
+
+@end