132 lines
5.2 KiB
Objective-C
132 lines
5.2 KiB
Objective-C
// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#import "GPBExtensionRegistry.h"
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#import "GPBBootstrap.h"
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#import "GPBDescriptor.h"
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@implementation GPBExtensionRegistry {
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CFMutableDictionaryRef mutableClassMap_;
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}
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- (instancetype)init {
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if ((self = [super init])) {
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// The keys are ObjC classes, so straight up ptr comparisons are fine.
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mutableClassMap_ = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, NULL,
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&kCFTypeDictionaryValueCallBacks);
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}
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return self;
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}
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- (void)dealloc {
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CFRelease(mutableClassMap_);
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[super dealloc];
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}
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// Direct access is use for speed, to avoid even internally declaring things
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// read/write, etc. The warning is enabled in the project to ensure code calling
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// protos can turn on -Wdirect-ivar-access without issues.
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wdirect-ivar-access"
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- (instancetype)copyWithZone:(NSZone *)zone {
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GPBExtensionRegistry *result = [[[self class] allocWithZone:zone] init];
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[result addExtensions:self];
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return result;
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}
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- (void)addExtension:(GPBExtensionDescriptor *)extension {
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if (extension == nil) {
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return;
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}
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Class containingMessageClass = extension.containingMessageClass;
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CFMutableDictionaryRef extensionMap = (CFMutableDictionaryRef)
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CFDictionaryGetValue(mutableClassMap_, containingMessageClass);
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if (extensionMap == nil) {
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// Use a custom dictionary here because the keys are numbers and conversion
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// back and forth from NSNumber isn't worth the cost.
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extensionMap = CFDictionaryCreateMutable(kCFAllocatorDefault, 0, NULL,
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&kCFTypeDictionaryValueCallBacks);
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CFDictionarySetValue(mutableClassMap_, containingMessageClass, extensionMap);
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CFRelease(extensionMap);
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}
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ssize_t key = extension.fieldNumber;
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CFDictionarySetValue(extensionMap, (const void *)key, extension);
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}
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- (GPBExtensionDescriptor *)extensionForDescriptor:(GPBDescriptor *)descriptor
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fieldNumber:(NSInteger)fieldNumber {
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Class messageClass = descriptor.messageClass;
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CFMutableDictionaryRef extensionMap = (CFMutableDictionaryRef)
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CFDictionaryGetValue(mutableClassMap_, messageClass);
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ssize_t key = fieldNumber;
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GPBExtensionDescriptor *result =
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(extensionMap
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? CFDictionaryGetValue(extensionMap, (const void *)key)
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: nil);
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return result;
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}
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static void CopyKeyValue(const void *key, const void *value, void *context) {
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CFMutableDictionaryRef extensionMap = (CFMutableDictionaryRef)context;
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CFDictionarySetValue(extensionMap, key, value);
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}
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static void CopySubDictionary(const void *key, const void *value, void *context) {
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CFMutableDictionaryRef mutableClassMap = (CFMutableDictionaryRef)context;
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Class containingMessageClass = key;
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CFMutableDictionaryRef otherExtensionMap = (CFMutableDictionaryRef)value;
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CFMutableDictionaryRef extensionMap = (CFMutableDictionaryRef)
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CFDictionaryGetValue(mutableClassMap, containingMessageClass);
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if (extensionMap == nil) {
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extensionMap = CFDictionaryCreateMutableCopy(kCFAllocatorDefault, 0, otherExtensionMap);
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CFDictionarySetValue(mutableClassMap, containingMessageClass, extensionMap);
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CFRelease(extensionMap);
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} else {
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CFDictionaryApplyFunction(otherExtensionMap, CopyKeyValue, extensionMap);
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}
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}
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- (void)addExtensions:(GPBExtensionRegistry *)registry {
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if (registry == nil) {
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// In the case where there are no extensions just ignore.
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return;
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}
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CFDictionaryApplyFunction(registry->mutableClassMap_, CopySubDictionary, mutableClassMap_);
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}
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#pragma clang diagnostic pop
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@end
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