| // 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 <Foundation/Foundation.h> | 
 |  | 
 | #import "GPBDescriptor.h" | 
 |  | 
 | @class GPBCodedInputStream; | 
 | @class GPBCodedOutputStream; | 
 | @class GPBExtensionRegistry; | 
 |  | 
 | void GPBExtensionMergeFromInputStream(GPBExtensionDescriptor *extension, | 
 |                                       BOOL isPackedOnStream, | 
 |                                       GPBCodedInputStream *input, | 
 |                                       GPBExtensionRegistry *extensionRegistry, | 
 |                                       GPBMessage *message); | 
 |  | 
 | size_t GPBComputeExtensionSerializedSizeIncludingTag( | 
 |     GPBExtensionDescriptor *extension, id value); | 
 |  | 
 | void GPBWriteExtensionValueToOutputStream(GPBExtensionDescriptor *extension, | 
 |                                           id value, | 
 |                                           GPBCodedOutputStream *output); |