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Diffstat (limited to 'third_party/protobuf/src/google/protobuf/wire_format_lite.h')
| -rw-r--r-- | third_party/protobuf/src/google/protobuf/wire_format_lite.h | 696 |
1 files changed, 0 insertions, 696 deletions
diff --git a/third_party/protobuf/src/google/protobuf/wire_format_lite.h b/third_party/protobuf/src/google/protobuf/wire_format_lite.h deleted file mode 100644 index 55fc7ecdfc..0000000000 --- a/third_party/protobuf/src/google/protobuf/wire_format_lite.h +++ /dev/null @@ -1,696 +0,0 @@ -// 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. - -// Author: kenton@google.com (Kenton Varda) -// atenasio@google.com (Chris Atenasio) (ZigZag transform) -// wink@google.com (Wink Saville) (refactored from wire_format.h) -// Based on original Protocol Buffers design by -// Sanjay Ghemawat, Jeff Dean, and others. -// -// This header is logically internal, but is made public because it is used -// from protocol-compiler-generated code, which may reside in other components. - -#ifndef GOOGLE_PROTOBUF_WIRE_FORMAT_LITE_H__ -#define GOOGLE_PROTOBUF_WIRE_FORMAT_LITE_H__ - -#include <string> -#include <google/protobuf/stubs/common.h> -#include <google/protobuf/message_lite.h> -#include <google/protobuf/io/coded_stream.h> // for CodedOutputStream::Varint32Size - -namespace google { - -namespace protobuf { - template <typename T> class RepeatedField; // repeated_field.h -} - -namespace protobuf { -namespace internal { - -class StringPieceField; - -// This class is for internal use by the protocol buffer library and by -// protocol-complier-generated message classes. It must not be called -// directly by clients. -// -// This class contains helpers for implementing the binary protocol buffer -// wire format without the need for reflection. Use WireFormat when using -// reflection. -// -// This class is really a namespace that contains only static methods. -class LIBPROTOBUF_EXPORT WireFormatLite { - public: - - // ----------------------------------------------------------------- - // Helper constants and functions related to the format. These are - // mostly meant for internal and generated code to use. - - // The wire format is composed of a sequence of tag/value pairs, each - // of which contains the value of one field (or one element of a repeated - // field). Each tag is encoded as a varint. The lower bits of the tag - // identify its wire type, which specifies the format of the data to follow. - // The rest of the bits contain the field number. Each type of field (as - // declared by FieldDescriptor::Type, in descriptor.h) maps to one of - // these wire types. Immediately following each tag is the field's value, - // encoded in the format specified by the wire type. Because the tag - // identifies the encoding of this data, it is possible to skip - // unrecognized fields for forwards compatibility. - - enum WireType { - WIRETYPE_VARINT = 0, - WIRETYPE_FIXED64 = 1, - WIRETYPE_LENGTH_DELIMITED = 2, - WIRETYPE_START_GROUP = 3, - WIRETYPE_END_GROUP = 4, - WIRETYPE_FIXED32 = 5, - }; - - // Lite alternative to FieldDescriptor::Type. Must be kept in sync. - enum FieldType { - TYPE_DOUBLE = 1, - TYPE_FLOAT = 2, - TYPE_INT64 = 3, - TYPE_UINT64 = 4, - TYPE_INT32 = 5, - TYPE_FIXED64 = 6, - TYPE_FIXED32 = 7, - TYPE_BOOL = 8, - TYPE_STRING = 9, - TYPE_GROUP = 10, - TYPE_MESSAGE = 11, - TYPE_BYTES = 12, - TYPE_UINT32 = 13, - TYPE_ENUM = 14, - TYPE_SFIXED32 = 15, - TYPE_SFIXED64 = 16, - TYPE_SINT32 = 17, - TYPE_SINT64 = 18, - MAX_FIELD_TYPE = 18, - }; - - // Lite alternative to FieldDescriptor::CppType. Must be kept in sync. - enum CppType { - CPPTYPE_INT32 = 1, - CPPTYPE_INT64 = 2, - CPPTYPE_UINT32 = 3, - CPPTYPE_UINT64 = 4, - CPPTYPE_DOUBLE = 5, - CPPTYPE_FLOAT = 6, - CPPTYPE_BOOL = 7, - CPPTYPE_ENUM = 8, - CPPTYPE_STRING = 9, - CPPTYPE_MESSAGE = 10, - MAX_CPPTYPE = 10, - }; - - // Helper method to get the CppType for a particular Type. - static CppType FieldTypeToCppType(FieldType type); - - // Given a FieldSescriptor::Type return its WireType - static inline WireFormatLite::WireType WireTypeForFieldType( - WireFormatLite::FieldType type) { - return kWireTypeForFieldType[type]; - } - - // Number of bits in a tag which identify the wire type. - static const int kTagTypeBits = 3; - // Mask for those bits. - static const uint32 kTagTypeMask = (1 << kTagTypeBits) - 1; - - // Helper functions for encoding and decoding tags. (Inlined below and in - // _inl.h) - // - // This is different from MakeTag(field->number(), field->type()) in the case - // of packed repeated fields. - static uint32 MakeTag(int field_number, WireType type); - static WireType GetTagWireType(uint32 tag); - static int GetTagFieldNumber(uint32 tag); - - // Compute the byte size of a tag. For groups, this includes both the start - // and end tags. - static inline int TagSize(int field_number, WireFormatLite::FieldType type); - - // Skips a field value with the given tag. The input should start - // positioned immediately after the tag. Skipped values are simply discarded, - // not recorded anywhere. See WireFormat::SkipField() for a version that - // records to an UnknownFieldSet. - static bool SkipField(io::CodedInputStream* input, uint32 tag); - - // Skips a field value with the given tag. The input should start - // positioned immediately after the tag. Skipped values are recorded to a - // CodedOutputStream. - static bool SkipField(io::CodedInputStream* input, uint32 tag, - io::CodedOutputStream* output); - - // Reads and ignores a message from the input. Skipped values are simply - // discarded, not recorded anywhere. See WireFormat::SkipMessage() for a - // version that records to an UnknownFieldSet. - static bool SkipMessage(io::CodedInputStream* input); - - // Reads and ignores a message from the input. Skipped values are recorded - // to a CodedOutputStream. - static bool SkipMessage(io::CodedInputStream* input, - io::CodedOutputStream* output); - -// This macro does the same thing as WireFormatLite::MakeTag(), but the -// result is usable as a compile-time constant, which makes it usable -// as a switch case or a template input. WireFormatLite::MakeTag() is more -// type-safe, though, so prefer it if possible. -#define GOOGLE_PROTOBUF_WIRE_FORMAT_MAKE_TAG(FIELD_NUMBER, TYPE) \ - static_cast<uint32>( \ - ((FIELD_NUMBER) << ::google::protobuf::internal::WireFormatLite::kTagTypeBits) \ - | (TYPE)) - - // These are the tags for the old MessageSet format, which was defined as: - // message MessageSet { - // repeated group Item = 1 { - // required int32 type_id = 2; - // required string message = 3; - // } - // } - static const int kMessageSetItemNumber = 1; - static const int kMessageSetTypeIdNumber = 2; - static const int kMessageSetMessageNumber = 3; - static const int kMessageSetItemStartTag = - GOOGLE_PROTOBUF_WIRE_FORMAT_MAKE_TAG(kMessageSetItemNumber, - WireFormatLite::WIRETYPE_START_GROUP); - static const int kMessageSetItemEndTag = - GOOGLE_PROTOBUF_WIRE_FORMAT_MAKE_TAG(kMessageSetItemNumber, - WireFormatLite::WIRETYPE_END_GROUP); - static const int kMessageSetTypeIdTag = - GOOGLE_PROTOBUF_WIRE_FORMAT_MAKE_TAG(kMessageSetTypeIdNumber, - WireFormatLite::WIRETYPE_VARINT); - static const int kMessageSetMessageTag = - GOOGLE_PROTOBUF_WIRE_FORMAT_MAKE_TAG(kMessageSetMessageNumber, - WireFormatLite::WIRETYPE_LENGTH_DELIMITED); - - // Byte size of all tags of a MessageSet::Item combined. - static const int kMessageSetItemTagsSize; - - // Helper functions for converting between floats/doubles and IEEE-754 - // uint32s/uint64s so that they can be written. (Assumes your platform - // uses IEEE-754 floats.) - static uint32 EncodeFloat(float value); - static float DecodeFloat(uint32 value); - static uint64 EncodeDouble(double value); - static double DecodeDouble(uint64 value); - - // Helper functions for mapping signed integers to unsigned integers in - // such a way that numbers with small magnitudes will encode to smaller - // varints. If you simply static_cast a negative number to an unsigned - // number and varint-encode it, it will always take 10 bytes, defeating - // the purpose of varint. So, for the "sint32" and "sint64" field types, - // we ZigZag-encode the values. - static uint32 ZigZagEncode32(int32 n); - static int32 ZigZagDecode32(uint32 n); - static uint64 ZigZagEncode64(int64 n); - static int64 ZigZagDecode64(uint64 n); - - // ================================================================= - // Methods for reading/writing individual field. The implementations - // of these methods are defined in wire_format_lite_inl.h; you must #include - // that file to use these. - -// Avoid ugly line wrapping -#define input io::CodedInputStream* input_arg -#define output io::CodedOutputStream* output_arg -#define field_number int field_number_arg -#define INL GOOGLE_ATTRIBUTE_ALWAYS_INLINE - - // Read fields, not including tags. The assumption is that you already - // read the tag to determine what field to read. - - // For primitive fields, we just use a templatized routine parameterized by - // the represented type and the FieldType. These are specialized with the - // appropriate definition for each declared type. - template <typename CType, enum FieldType DeclaredType> INL - static bool ReadPrimitive(input, CType* value); - - // Reads repeated primitive values, with optimizations for repeats. - // tag_size and tag should both be compile-time constants provided by the - // protocol compiler. - template <typename CType, enum FieldType DeclaredType> INL - static bool ReadRepeatedPrimitive(int tag_size, - uint32 tag, - input, - RepeatedField<CType>* value); - - // Identical to ReadRepeatedPrimitive, except will not inline the - // implementation. - template <typename CType, enum FieldType DeclaredType> - static bool ReadRepeatedPrimitiveNoInline(int tag_size, - uint32 tag, - input, - RepeatedField<CType>* value); - - // Reads a primitive value directly from the provided buffer. It returns a - // pointer past the segment of data that was read. - // - // This is only implemented for the types with fixed wire size, e.g. - // float, double, and the (s)fixed* types. - template <typename CType, enum FieldType DeclaredType> INL - static const uint8* ReadPrimitiveFromArray(const uint8* buffer, CType* value); - - // Reads a primitive packed field. - // - // This is only implemented for packable types. - template <typename CType, enum FieldType DeclaredType> INL - static bool ReadPackedPrimitive(input, RepeatedField<CType>* value); - - // Identical to ReadPackedPrimitive, except will not inline the - // implementation. - template <typename CType, enum FieldType DeclaredType> - static bool ReadPackedPrimitiveNoInline(input, RepeatedField<CType>* value); - - // Read a packed enum field. If the is_valid function is not NULL, values for - // which is_valid(value) returns false are silently dropped. - static bool ReadPackedEnumNoInline(input, - bool (*is_valid)(int), - RepeatedField<int>* values); - - // Read a packed enum field. If the is_valid function is not NULL, values for - // which is_valid(value) returns false are appended to unknown_fields_stream. - static bool ReadPackedEnumPreserveUnknowns( - input, - field_number, - bool (*is_valid)(int), - io::CodedOutputStream* unknown_fields_stream, - RepeatedField<int>* values); - - // Read a string. ReadString(..., string* value) requires an existing string. - static inline bool ReadString(input, string* value); - // ReadString(..., string** p) is internal-only, and should only be called - // from generated code. It starts by setting *p to "new string" - // if *p == &GetEmptyStringAlreadyInited(). It then invokes - // ReadString(input, *p). This is useful for reducing code size. - static inline bool ReadString(input, string** p); - // Analogous to ReadString(). - static bool ReadBytes(input, string* value); - static bool ReadBytes(input, string** p); - - - enum Operation { - PARSE = 0, - SERIALIZE = 1, - }; - - // Returns true if the data is valid UTF-8. - static bool VerifyUtf8String(const char* data, int size, - Operation op, - const char* field_name); - - static inline bool ReadGroup (field_number, input, MessageLite* value); - static inline bool ReadMessage(input, MessageLite* value); - - // Like above, but de-virtualize the call to MergePartialFromCodedStream(). - // The pointer must point at an instance of MessageType, *not* a subclass (or - // the subclass must not override MergePartialFromCodedStream()). - template<typename MessageType> - static inline bool ReadGroupNoVirtual(field_number, input, - MessageType* value); - template<typename MessageType> - static inline bool ReadMessageNoVirtual(input, MessageType* value); - - // The same, but do not modify input's recursion depth. This is useful - // when reading a bunch of groups or messages in a loop, because then the - // recursion depth can be incremented before the loop and decremented after. - template<typename MessageType> - static inline bool ReadGroupNoVirtualNoRecursionDepth(field_number, input, - MessageType* value); - - template<typename MessageType> - static inline bool ReadMessageNoVirtualNoRecursionDepth(input, - MessageType* value); - - // Write a tag. The Write*() functions typically include the tag, so - // normally there's no need to call this unless using the Write*NoTag() - // variants. - INL static void WriteTag(field_number, WireType type, output); - - // Write fields, without tags. - INL static void WriteInt32NoTag (int32 value, output); - INL static void WriteInt64NoTag (int64 value, output); - INL static void WriteUInt32NoTag (uint32 value, output); - INL static void WriteUInt64NoTag (uint64 value, output); - INL static void WriteSInt32NoTag (int32 value, output); - INL static void WriteSInt64NoTag (int64 value, output); - INL static void WriteFixed32NoTag (uint32 value, output); - INL static void WriteFixed64NoTag (uint64 value, output); - INL static void WriteSFixed32NoTag(int32 value, output); - INL static void WriteSFixed64NoTag(int64 value, output); - INL static void WriteFloatNoTag (float value, output); - INL static void WriteDoubleNoTag (double value, output); - INL static void WriteBoolNoTag (bool value, output); - INL static void WriteEnumNoTag (int value, output); - - // Write fields, including tags. - static void WriteInt32 (field_number, int32 value, output); - static void WriteInt64 (field_number, int64 value, output); - static void WriteUInt32 (field_number, uint32 value, output); - static void WriteUInt64 (field_number, uint64 value, output); - static void WriteSInt32 (field_number, int32 value, output); - static void WriteSInt64 (field_number, int64 value, output); - static void WriteFixed32 (field_number, uint32 value, output); - static void WriteFixed64 (field_number, uint64 value, output); - static void WriteSFixed32(field_number, int32 value, output); - static void WriteSFixed64(field_number, int64 value, output); - static void WriteFloat (field_number, float value, output); - static void WriteDouble (field_number, double value, output); - static void WriteBool (field_number, bool value, output); - static void WriteEnum (field_number, int value, output); - - static void WriteString(field_number, const string& value, output); - static void WriteBytes (field_number, const string& value, output); - static void WriteStringMaybeAliased( - field_number, const string& value, output); - static void WriteBytesMaybeAliased( - field_number, const string& value, output); - - static void WriteGroup( - field_number, const MessageLite& value, output); - static void WriteMessage( - field_number, const MessageLite& value, output); - // Like above, but these will check if the output stream has enough - // space to write directly to a flat array. - static void WriteGroupMaybeToArray( - field_number, const MessageLite& value, output); - static void WriteMessageMaybeToArray( - field_number, const MessageLite& value, output); - - // Like above, but de-virtualize the call to SerializeWithCachedSizes(). The - // pointer must point at an instance of MessageType, *not* a subclass (or - // the subclass must not override SerializeWithCachedSizes()). - template<typename MessageType> - static inline void WriteGroupNoVirtual( - field_number, const MessageType& value, output); - template<typename MessageType> - static inline void WriteMessageNoVirtual( - field_number, const MessageType& value, output); - -#undef output -#define output uint8* target - - // Like above, but use only *ToArray methods of CodedOutputStream. - INL static uint8* WriteTagToArray(field_number, WireType type, output); - - // Write fields, without tags. - INL static uint8* WriteInt32NoTagToArray (int32 value, output); - INL static uint8* WriteInt64NoTagToArray (int64 value, output); - INL static uint8* WriteUInt32NoTagToArray (uint32 value, output); - INL static uint8* WriteUInt64NoTagToArray (uint64 value, output); - INL static uint8* WriteSInt32NoTagToArray (int32 value, output); - INL static uint8* WriteSInt64NoTagToArray (int64 value, output); - INL static uint8* WriteFixed32NoTagToArray (uint32 value, output); - INL static uint8* WriteFixed64NoTagToArray (uint64 value, output); - INL static uint8* WriteSFixed32NoTagToArray(int32 value, output); - INL static uint8* WriteSFixed64NoTagToArray(int64 value, output); - INL static uint8* WriteFloatNoTagToArray (float value, output); - INL static uint8* WriteDoubleNoTagToArray (double value, output); - INL static uint8* WriteBoolNoTagToArray (bool value, output); - INL static uint8* WriteEnumNoTagToArray (int value, output); - - // Write fields, including tags. - INL static uint8* WriteInt32ToArray(field_number, int32 value, output); - INL static uint8* WriteInt64ToArray(field_number, int64 value, output); - INL static uint8* WriteUInt32ToArray(field_number, uint32 value, output); - INL static uint8* WriteUInt64ToArray(field_number, uint64 value, output); - INL static uint8* WriteSInt32ToArray(field_number, int32 value, output); - INL static uint8* WriteSInt64ToArray(field_number, int64 value, output); - INL static uint8* WriteFixed32ToArray(field_number, uint32 value, output); - INL static uint8* WriteFixed64ToArray(field_number, uint64 value, output); - INL static uint8* WriteSFixed32ToArray(field_number, int32 value, output); - INL static uint8* WriteSFixed64ToArray(field_number, int64 value, output); - INL static uint8* WriteFloatToArray(field_number, float value, output); - INL static uint8* WriteDoubleToArray(field_number, double value, output); - INL static uint8* WriteBoolToArray(field_number, bool value, output); - INL static uint8* WriteEnumToArray(field_number, int value, output); - - INL static uint8* WriteStringToArray( - field_number, const string& value, output); - INL static uint8* WriteBytesToArray( - field_number, const string& value, output); - - INL static uint8* WriteGroupToArray( - field_number, const MessageLite& value, output); - INL static uint8* WriteMessageToArray( - field_number, const MessageLite& value, output); - - // Like above, but de-virtualize the call to SerializeWithCachedSizes(). The - // pointer must point at an instance of MessageType, *not* a subclass (or - // the subclass must not override SerializeWithCachedSizes()). - template<typename MessageType> - INL static uint8* WriteGroupNoVirtualToArray( - field_number, const MessageType& value, output); - template<typename MessageType> - INL static uint8* WriteMessageNoVirtualToArray( - field_number, const MessageType& value, output); - -#undef output -#undef input -#undef INL - -#undef field_number - - // Compute the byte size of a field. The XxSize() functions do NOT include - // the tag, so you must also call TagSize(). (This is because, for repeated - // fields, you should only call TagSize() once and multiply it by the element - // count, but you may have to call XxSize() for each individual element.) - static inline int Int32Size ( int32 value); - static inline int Int64Size ( int64 value); - static inline int UInt32Size (uint32 value); - static inline int UInt64Size (uint64 value); - static inline int SInt32Size ( int32 value); - static inline int SInt64Size ( int64 value); - static inline int EnumSize ( int value); - - // These types always have the same size. - static const int kFixed32Size = 4; - static const int kFixed64Size = 8; - static const int kSFixed32Size = 4; - static const int kSFixed64Size = 8; - static const int kFloatSize = 4; - static const int kDoubleSize = 8; - static const int kBoolSize = 1; - - static inline int StringSize(const string& value); - static inline int BytesSize (const string& value); - - static inline int GroupSize (const MessageLite& value); - static inline int MessageSize(const MessageLite& value); - - // Like above, but de-virtualize the call to ByteSize(). The - // pointer must point at an instance of MessageType, *not* a subclass (or - // the subclass must not override ByteSize()). - template<typename MessageType> - static inline int GroupSizeNoVirtual (const MessageType& value); - template<typename MessageType> - static inline int MessageSizeNoVirtual(const MessageType& value); - - // Given the length of data, calculate the byte size of the data on the - // wire if we encode the data as a length delimited field. - static inline int LengthDelimitedSize(int length); - - private: - // A helper method for the repeated primitive reader. This method has - // optimizations for primitive types that have fixed size on the wire, and - // can be read using potentially faster paths. - template <typename CType, enum FieldType DeclaredType> GOOGLE_ATTRIBUTE_ALWAYS_INLINE - static bool ReadRepeatedFixedSizePrimitive( - int tag_size, - uint32 tag, - google::protobuf::io::CodedInputStream* input, - RepeatedField<CType>* value); - - // Like ReadRepeatedFixedSizePrimitive but for packed primitive fields. - template <typename CType, enum FieldType DeclaredType> GOOGLE_ATTRIBUTE_ALWAYS_INLINE - static bool ReadPackedFixedSizePrimitive(google::protobuf::io::CodedInputStream* input, - RepeatedField<CType>* value); - - static const CppType kFieldTypeToCppTypeMap[]; - static const WireFormatLite::WireType kWireTypeForFieldType[]; - - GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(WireFormatLite); -}; - -// A class which deals with unknown values. The default implementation just -// discards them. WireFormat defines a subclass which writes to an -// UnknownFieldSet. This class is used by ExtensionSet::ParseField(), since -// ExtensionSet is part of the lite library but UnknownFieldSet is not. -class LIBPROTOBUF_EXPORT FieldSkipper { - public: - FieldSkipper() {} - virtual ~FieldSkipper() {} - - // Skip a field whose tag has already been consumed. - virtual bool SkipField(io::CodedInputStream* input, uint32 tag); - - // Skip an entire message or group, up to an end-group tag (which is consumed) - // or end-of-stream. - virtual bool SkipMessage(io::CodedInputStream* input); - - // Deal with an already-parsed unrecognized enum value. The default - // implementation does nothing, but the UnknownFieldSet-based implementation - // saves it as an unknown varint. - virtual void SkipUnknownEnum(int field_number, int value); -}; - -// Subclass of FieldSkipper which saves skipped fields to a CodedOutputStream. - -class LIBPROTOBUF_EXPORT CodedOutputStreamFieldSkipper : public FieldSkipper { - public: - explicit CodedOutputStreamFieldSkipper(io::CodedOutputStream* unknown_fields) - : unknown_fields_(unknown_fields) {} - virtual ~CodedOutputStreamFieldSkipper() {} - - // implements FieldSkipper ----------------------------------------- - virtual bool SkipField(io::CodedInputStream* input, uint32 tag); - virtual bool SkipMessage(io::CodedInputStream* input); - virtual void SkipUnknownEnum(int field_number, int value); - - protected: - io::CodedOutputStream* unknown_fields_; -}; - - -// inline methods ==================================================== - -inline WireFormatLite::CppType -WireFormatLite::FieldTypeToCppType(FieldType type) { - return kFieldTypeToCppTypeMap[type]; -} - -inline uint32 WireFormatLite::MakeTag(int field_number, WireType type) { - return GOOGLE_PROTOBUF_WIRE_FORMAT_MAKE_TAG(field_number, type); -} - -inline WireFormatLite::WireType WireFormatLite::GetTagWireType(uint32 tag) { - return static_cast<WireType>(tag & kTagTypeMask); -} - -inline int WireFormatLite::GetTagFieldNumber(uint32 tag) { - return static_cast<int>(tag >> kTagTypeBits); -} - -inline int WireFormatLite::TagSize(int field_number, - WireFormatLite::FieldType type) { - int result = io::CodedOutputStream::VarintSize32( - field_number << kTagTypeBits); - if (type == TYPE_GROUP) { - // Groups have both a start and an end tag. - return result * 2; - } else { - return result; - } -} - -inline uint32 WireFormatLite::EncodeFloat(float value) { - union {float f; uint32 i;}; - f = value; - return i; -} - -inline float WireFormatLite::DecodeFloat(uint32 value) { - union {float f; uint32 i;}; - i = value; - return f; -} - -inline uint64 WireFormatLite::EncodeDouble(double value) { - union {double f; uint64 i;}; - f = value; - return i; -} - -inline double WireFormatLite::DecodeDouble(uint64 value) { - union {double f; uint64 i;}; - i = value; - return f; -} - -// ZigZag Transform: Encodes signed integers so that they can be -// effectively used with varint encoding. -// -// varint operates on unsigned integers, encoding smaller numbers into -// fewer bytes. If you try to use it on a signed integer, it will treat -// this number as a very large unsigned integer, which means that even -// small signed numbers like -1 will take the maximum number of bytes -// (10) to encode. ZigZagEncode() maps signed integers to unsigned -// in such a way that those with a small absolute value will have smaller -// encoded values, making them appropriate for encoding using varint. -// -// int32 -> uint32 -// ------------------------- -// 0 -> 0 -// -1 -> 1 -// 1 -> 2 -// -2 -> 3 -// ... -> ... -// 2147483647 -> 4294967294 -// -2147483648 -> 4294967295 -// -// >> encode >> -// << decode << - -inline uint32 WireFormatLite::ZigZagEncode32(int32 n) { - // Note: the right-shift must be arithmetic - return (static_cast<uint32>(n) << 1) ^ (n >> 31); -} - -inline int32 WireFormatLite::ZigZagDecode32(uint32 n) { - return (n >> 1) ^ -static_cast<int32>(n & 1); -} - -inline uint64 WireFormatLite::ZigZagEncode64(int64 n) { - // Note: the right-shift must be arithmetic - return (static_cast<uint64>(n) << 1) ^ (n >> 63); -} - -inline int64 WireFormatLite::ZigZagDecode64(uint64 n) { - return (n >> 1) ^ -static_cast<int64>(n & 1); -} - -// String is for UTF-8 text only, but, even so, ReadString() can simply -// call ReadBytes(). - -inline bool WireFormatLite::ReadString(io::CodedInputStream* input, - string* value) { - return ReadBytes(input, value); -} - -inline bool WireFormatLite::ReadString(io::CodedInputStream* input, - string** p) { - return ReadBytes(input, p); -} - -} // namespace internal -} // namespace protobuf - -} // namespace google -#endif // GOOGLE_PROTOBUF_WIRE_FORMAT_LITE_H__ |