1// Protocol Buffers - Google's data interchange format 2// Copyright 2008 Google Inc. All rights reserved. 3// https://developers.google.com/protocol-buffers/ 4// 5// Redistribution and use in source and binary forms, with or without 6// modification, are permitted provided that the following conditions are 7// met: 8// 9// * Redistributions of source code must retain the above copyright 10// notice, this list of conditions and the following disclaimer. 11// * Redistributions in binary form must reproduce the above 12// copyright notice, this list of conditions and the following disclaimer 13// in the documentation and/or other materials provided with the 14// distribution. 15// * Neither the name of Google Inc. nor the names of its 16// contributors may be used to endorse or promote products derived from 17// this software without specific prior written permission. 18// 19// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31#import "GPBWireFormat.h" 32 33#import "GPBUtilities_PackagePrivate.h" 34 35enum { 36 GPBWireFormatTagTypeBits = 3, 37 GPBWireFormatTagTypeMask = 7 /* = (1 << GPBWireFormatTagTypeBits) - 1 */, 38}; 39 40uint32_t GPBWireFormatMakeTag(uint32_t fieldNumber, GPBWireFormat wireType) { 41 return (fieldNumber << GPBWireFormatTagTypeBits) | wireType; 42} 43 44GPBWireFormat GPBWireFormatGetTagWireType(uint32_t tag) { 45 return (GPBWireFormat)(tag & GPBWireFormatTagTypeMask); 46} 47 48uint32_t GPBWireFormatGetTagFieldNumber(uint32_t tag) { 49 return GPBLogicalRightShift32(tag, GPBWireFormatTagTypeBits); 50} 51 52BOOL GPBWireFormatIsValidTag(uint32_t tag) { 53 uint32_t formatBits = (tag & GPBWireFormatTagTypeMask); 54 // The valid GPBWireFormat* values are 0-5, anything else is not a valid tag. 55 BOOL result = (formatBits <= 5); 56 return result; 57} 58 59GPBWireFormat GPBWireFormatForType(GPBDataType type, BOOL isPacked) { 60 if (isPacked) { 61 return GPBWireFormatLengthDelimited; 62 } 63 64 static const GPBWireFormat format[GPBDataType_Count] = { 65 GPBWireFormatVarint, // GPBDataTypeBool 66 GPBWireFormatFixed32, // GPBDataTypeFixed32 67 GPBWireFormatFixed32, // GPBDataTypeSFixed32 68 GPBWireFormatFixed32, // GPBDataTypeFloat 69 GPBWireFormatFixed64, // GPBDataTypeFixed64 70 GPBWireFormatFixed64, // GPBDataTypeSFixed64 71 GPBWireFormatFixed64, // GPBDataTypeDouble 72 GPBWireFormatVarint, // GPBDataTypeInt32 73 GPBWireFormatVarint, // GPBDataTypeInt64 74 GPBWireFormatVarint, // GPBDataTypeSInt32 75 GPBWireFormatVarint, // GPBDataTypeSInt64 76 GPBWireFormatVarint, // GPBDataTypeUInt32 77 GPBWireFormatVarint, // GPBDataTypeUInt64 78 GPBWireFormatLengthDelimited, // GPBDataTypeBytes 79 GPBWireFormatLengthDelimited, // GPBDataTypeString 80 GPBWireFormatLengthDelimited, // GPBDataTypeMessage 81 GPBWireFormatStartGroup, // GPBDataTypeGroup 82 GPBWireFormatVarint // GPBDataTypeEnum 83 }; 84 return format[type]; 85} 86