text: // Protocol Buffers for Objective C
  //
  // Copyright 2010 Booyah Inc.
  // Copyright 2008 Cyrus Najmabadi
  //
  // 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.
  
  typedef enum {
    PBWireFormatVarint = 0,
    PBWireFormatFixed64 = 1,
    PBWireFormatLengthDelimited = 2,
    PBWireFormatStartGroup = 3,
    PBWireFormatEndGroup = 4,
    PBWireFormatFixed32 = 5,
  
    PBWireFormatTagTypeBits = 3,
    PBWireFormatTagTypeMask = 7 /* = (1 << PBWireFormatTagTypeBits) - 1*/,
  
    PBWireFormatMessageSetItem = 1,
    PBWireFormatMessageSetTypeId = 2,
    PBWireFormatMessageSetMessage = 3
  } PBWireFormat;
  #ifdef __cplusplus
  extern "C"{
  #endif
  SInt32 PBWireFormatMakeTag(SInt32 fieldNumber, SInt32 wireType);
  SInt32 PBWireFormatGetTagWireType(SInt32 tag);
  SInt32 PBWireFormatGetTagFieldNumber(SInt32 tag);
  
  #define PBWireFormatMessageSetItemTag (PBWireFormatMakeTag(PBWireFormatMessageSetItem, PBWireFormatStartGroup))
  #define PBWireFormatMessageSetItemEndTag (PBWireFormatMakeTag(PBWireFormatMessageSetItem, PBWireFormatEndGroup))
  #define PBWireFormatMessageSetTypeIdTag (PBWireFormatMakeTag(PBWireFormatMessageSetTypeId, PBWireFormatVarint))
  #define PBWireFormatMessageSetMessageTag (PBWireFormatMakeTag(PBWireFormatMessageSetMessage, PBWireFormatLengthDelimited))
      
  #ifdef __cplusplus
  }
  #endif