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Diffstat (limited to 'third_party/protobuf/3.4.0/src/google/protobuf/generated_message_util.h')
| -rw-r--r-- | third_party/protobuf/3.4.0/src/google/protobuf/generated_message_util.h | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/third_party/protobuf/3.4.0/src/google/protobuf/generated_message_util.h b/third_party/protobuf/3.4.0/src/google/protobuf/generated_message_util.h new file mode 100644 index 0000000000..096a84cd8c --- /dev/null +++ b/third_party/protobuf/3.4.0/src/google/protobuf/generated_message_util.h @@ -0,0 +1,281 @@ +// 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) +// Based on original Protocol Buffers design by +// Sanjay Ghemawat, Jeff Dean, and others. +// +// This file contains miscellaneous helper code used by generated code -- +// including lite types -- but which should not be used directly by users. + +#ifndef GOOGLE_PROTOBUF_GENERATED_MESSAGE_UTIL_H__ +#define GOOGLE_PROTOBUF_GENERATED_MESSAGE_UTIL_H__ + +#include <assert.h> +#include <climits> +#include <string> +#include <vector> + +#include <google/protobuf/stubs/logging.h> +#include <google/protobuf/stubs/common.h> +#include <google/protobuf/stubs/once.h> +#include <google/protobuf/has_bits.h> +#include <google/protobuf/map_entry_lite.h> +#include <google/protobuf/message_lite.h> +#include <google/protobuf/wire_format_lite.h> + +namespace google { + +namespace protobuf { + +class Arena; + +namespace io { class CodedInputStream; } + +namespace internal { + + +// Annotation for the compiler to emit a deprecation message if a field marked +// with option 'deprecated=true' is used in the code, or for other things in +// generated code which are deprecated. +// +// For internal use in the pb.cc files, deprecation warnings are suppressed +// there. +#undef DEPRECATED_PROTOBUF_FIELD +#define PROTOBUF_DEPRECATED + +#define GOOGLE_PROTOBUF_DEPRECATED_ATTR + + +// Returns the offset of the given field within the given aggregate type. +// This is equivalent to the ANSI C offsetof() macro. However, according +// to the C++ standard, offsetof() only works on POD types, and GCC +// enforces this requirement with a warning. In practice, this rule is +// unnecessarily strict; there is probably no compiler or platform on +// which the offsets of the direct fields of a class are non-constant. +// Fields inherited from superclasses *can* have non-constant offsets, +// but that's not what this macro will be used for. +#if defined(__clang__) +// For Clang we use __builtin_offsetof() and suppress the warning, +// to avoid Control Flow Integrity and UBSan vptr sanitizers from +// crashing while trying to validate the invalid reinterpet_casts. +#define GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(TYPE, FIELD) \ + _Pragma("clang diagnostic push") \ + _Pragma("clang diagnostic ignored \"-Winvalid-offsetof\"") \ + __builtin_offsetof(TYPE, FIELD) \ + _Pragma("clang diagnostic pop") +#else +// Note that we calculate relative to the pointer value 16 here since if we +// just use zero, GCC complains about dereferencing a NULL pointer. We +// choose 16 rather than some other number just in case the compiler would +// be confused by an unaligned pointer. +#define GOOGLE_PROTOBUF_GENERATED_MESSAGE_FIELD_OFFSET(TYPE, FIELD) \ + static_cast< ::google::protobuf::uint32>( \ + reinterpret_cast<const char*>( \ + &reinterpret_cast<const TYPE*>(16)->FIELD) - \ + reinterpret_cast<const char*>(16)) +#endif + +// Constants for special floating point values. +LIBPROTOBUF_EXPORT double Infinity(); +LIBPROTOBUF_EXPORT double NaN(); + + +// True if IsInitialized() is true for all elements of t. Type is expected +// to be a RepeatedPtrField<some message type>. It's useful to have this +// helper here to keep the protobuf compiler from ever having to emit loops in +// IsInitialized() methods. We want the C++ compiler to inline this or not +// as it sees fit. +template <class Type> bool AllAreInitialized(const Type& t) { + for (int i = t.size(); --i >= 0; ) { + if (!t.Get(i).IsInitialized()) return false; + } + return true; +} + +LIBPROTOBUF_EXPORT void InitProtobufDefaults(); + +struct LIBPROTOBUF_EXPORT FieldMetadata { + uint32 offset; // offset of this field in the struct + uint32 tag; // field * 8 + wire_type + // byte offset * 8 + bit_offset; + // if the high bit is set then this is the byte offset of the oneof_case + // for this field. + uint32 has_offset; + uint32 type; // the type of this field. + const void* ptr; // auxiliary data + + // From the serializer point of view each fundamental type can occur in + // 4 different ways. For simplicity we treat all combinations as a cartesion + // product although not all combinations are allowed. + enum FieldTypeClass { + kPresence, + kNoPresence, + kRepeated, + kPacked, + kOneOf, + kNumTypeClasses // must be last enum + }; + // C++ protobuf has 20 fundamental types, were we added Cord and StringPiece + // and also distinquish the same types if they have different wire format. + enum { + kCordType = 19, + kStringPieceType = 20, + kNumTypes = 20, + kSpecial = kNumTypes * kNumTypeClasses, + }; + + static int CalculateType(int fundamental_type, FieldTypeClass type_class); +}; + +inline bool IsPresent(const void* base, uint32 hasbit) { + const uint32* has_bits_array = static_cast<const uint32*>(base); + return has_bits_array[hasbit / 32] & (1u << (hasbit & 31)); +} + +inline bool IsOneofPresent(const void* base, uint32 offset, uint32 tag) { + const uint32* oneof = + reinterpret_cast<const uint32*>(static_cast<const uint8*>(base) + offset); + return *oneof == tag >> 3; +} + +typedef void (*SpecialSerializer)(const uint8* base, uint32 offset, uint32 tag, + uint32 has_offset, + ::google::protobuf::io::CodedOutputStream* output); + +LIBPROTOBUF_EXPORT void ExtensionSerializer(const uint8* base, uint32 offset, uint32 tag, + uint32 has_offset, + ::google::protobuf::io::CodedOutputStream* output); +LIBPROTOBUF_EXPORT void UnknownFieldSerializerLite(const uint8* base, uint32 offset, uint32 tag, + uint32 has_offset, + ::google::protobuf::io::CodedOutputStream* output); + +struct SerializationTable { + int num_fields; + const FieldMetadata* field_table; +}; + +LIBPROTOBUF_EXPORT void SerializeInternal(const uint8* base, const FieldMetadata* table, + int num_fields, ::google::protobuf::io::CodedOutputStream* output); + +inline void TableSerialize(const ::google::protobuf::MessageLite& msg, + const SerializationTable* table, + ::google::protobuf::io::CodedOutputStream* output) { + const FieldMetadata* field_table = table->field_table; + int num_fields = table->num_fields - 1; + const uint8* base = reinterpret_cast<const uint8*>(&msg); + // TODO(gerbens) This skips the first test if we could use the fast + // array serialization path, we should make this + // int cached_size = + // *reinterpret_cast<const int32*>(base + field_table->offset); + // SerializeWithCachedSize(msg, field_table + 1, num_fields, cached_size, ...) + // But we keep conformance with the old way for now. + SerializeInternal(base, field_table + 1, num_fields, output); +} + +uint8* SerializeInternalToArray(const uint8* base, const FieldMetadata* table, + int num_fields, bool is_deterministic, + uint8* buffer); + +inline uint8* TableSerializeToArray(const ::google::protobuf::MessageLite& msg, + const SerializationTable* table, + bool is_deterministic, uint8* buffer) { + const uint8* base = reinterpret_cast<const uint8*>(&msg); + const FieldMetadata* field_table = table->field_table + 1; + int num_fields = table->num_fields - 1; + return SerializeInternalToArray(base, field_table, num_fields, + is_deterministic, buffer); +} + +template <typename T> +struct CompareHelper { + bool operator()(const T& a, const T& b) { return a < b; } +}; + +template <> +struct CompareHelper<ArenaStringPtr> { + bool operator()(const ArenaStringPtr& a, const ArenaStringPtr& b) { + return a.Get() < b.Get(); + } +}; + +struct CompareMapKey { + template <typename T> + bool operator()(const MapEntryHelper<T>& a, const MapEntryHelper<T>& b) { + return Compare(a.key_, b.key_); + } + template <typename T> + bool Compare(const T& a, const T& b) { + return CompareHelper<T>()(a, b); + } +}; + +template <typename MapFieldType, const SerializationTable* table> +void MapFieldSerializer(const uint8* base, uint32 offset, uint32 tag, + uint32 has_offset, + ::google::protobuf::io::CodedOutputStream* output) { + typedef MapEntryHelper<typename MapFieldType::EntryTypeTrait> Entry; + typedef typename MapFieldType::MapType::const_iterator Iter; + + const MapFieldType& map_field = + *reinterpret_cast<const MapFieldType*>(base + offset); + const SerializationTable* t = + table + + has_offset; // has_offset is overloaded for maps to mean table offset + if (!output->IsSerializationDeterministic()) { + for (Iter it = map_field.GetMap().begin(); it != map_field.GetMap().end(); + ++it) { + Entry map_entry(*it); + output->WriteVarint32(tag); + output->WriteVarint32(map_entry._cached_size_); + SerializeInternal(reinterpret_cast<const uint8*>(&map_entry), + t->field_table, t->num_fields, output); + } + } else { + std::vector<Entry> v; + for (Iter it = map_field.GetMap().begin(); it != map_field.GetMap().end(); + ++it) { + v.push_back(Entry(*it)); + } + std::sort(v.begin(), v.end(), CompareMapKey()); + for (int i = 0; i < v.size(); i++) { + output->WriteVarint32(tag); + output->WriteVarint32(v[i]._cached_size_); + SerializeInternal(reinterpret_cast<const uint8*>(&v[i]), t->field_table, + t->num_fields, output); + } + } +} + +} // namespace internal +} // namespace protobuf + +} // namespace google +#endif // GOOGLE_PROTOBUF_GENERATED_MESSAGE_UTIL_H__ |