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Diffstat (limited to 'third_party/protobuf/3.4.0/src/google/protobuf/generated_message_table_driven.h')
| -rw-r--r-- | third_party/protobuf/3.4.0/src/google/protobuf/generated_message_table_driven.h | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/third_party/protobuf/3.4.0/src/google/protobuf/generated_message_table_driven.h b/third_party/protobuf/3.4.0/src/google/protobuf/generated_message_table_driven.h new file mode 100644 index 0000000000..5eb63dbd27 --- /dev/null +++ b/third_party/protobuf/3.4.0/src/google/protobuf/generated_message_table_driven.h @@ -0,0 +1,231 @@ +// 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. + +#ifndef GOOGLE_PROTOBUF_GENERATED_MESSAGE_TABLE_DRIVEN_H__ +#define GOOGLE_PROTOBUF_GENERATED_MESSAGE_TABLE_DRIVEN_H__ + +#include <google/protobuf/map.h> +#include <google/protobuf/map_entry_lite.h> +#include <google/protobuf/message_lite.h> +#include <google/protobuf/wire_format_lite.h> +#include <google/protobuf/wire_format_lite_inl.h> + +#if LANG_CXX11 +#define PROTOBUF_CONSTEXPR constexpr + +// We require C++11 and Clang to use constexpr for variables, as GCC 4.8 +// requires constexpr to be consistent between declarations of variables +// unnecessarily (see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58541). +#ifdef __clang__ +#define PROTOBUF_CONSTEXPR_VAR constexpr +#else // !__clang__ +#define PROTOBUF_CONSTEXPR_VAR +#endif // !_clang + +#else +#define PROTOBUF_CONSTEXPR +#define PROTOBUF_CONSTEXPR_VAR +#endif + +namespace google { +namespace protobuf { +namespace internal { + +// Processing-type masks. +static PROTOBUF_CONSTEXPR const unsigned char kOneofMask = 0x40; +static PROTOBUF_CONSTEXPR const unsigned char kRepeatedMask = 0x20; +// Mask for the raw type: either a WireFormatLite::FieldType or one of the +// ProcessingTypes below, without the oneof or repeated flag. +static PROTOBUF_CONSTEXPR const unsigned char kTypeMask = 0x1f; + +// Wire type masks. +static PROTOBUF_CONSTEXPR const unsigned char kNotPackedMask = 0x10; +static PROTOBUF_CONSTEXPR const unsigned char kInvalidMask = 0x20; + +enum ProcessingTypes { + TYPE_STRING_CORD = 19, + TYPE_STRING_STRING_PIECE = 20, + TYPE_BYTES_CORD = 21, + TYPE_BYTES_STRING_PIECE = 22, + TYPE_MAP = 23, +}; + +#if LANG_CXX11 +static_assert(TYPE_MAP < kRepeatedMask, "Invalid enum"); +#endif + +// TODO(ckennelly): Add a static assertion to ensure that these masks do not +// conflict with wiretypes. + +// ParseTableField is kept small to help simplify instructions for computing +// offsets, as we will always need this information to parse a field. +// Additional data, needed for some types, is stored in +// AuxillaryParseTableField. +struct ParseTableField { + uint32 offset; + // The presence_index ordinarily represents a has_bit index, but for fields + // inside a oneof it represents the index in _oneof_case_. + uint32 presence_index; + unsigned char normal_wiretype; + unsigned char packed_wiretype; + + // processing_type is given by: + // (FieldDescriptor->type() << 1) | FieldDescriptor->is_packed() + unsigned char processing_type; + + unsigned char tag_size; +}; + +struct ParseTable; + +union AuxillaryParseTableField { + typedef bool (*EnumValidator)(int); + + // Enums + struct enum_aux { + EnumValidator validator; + }; + enum_aux enums; + // Group, messages + struct message_aux { + // ExplicitlyInitialized<T> -> T requires a reinterpret_cast, which prevents + // the tables from being constructed as a constexpr. We use void to avoid + // the cast. + const void* default_message_void; + const MessageLite* default_message() const { + return static_cast<const MessageLite*>(default_message_void); + } + const ParseTable* parse_table; + }; + message_aux messages; + // Strings + struct string_aux { + const void* default_ptr; + const char* field_name; + }; + string_aux strings; + + struct map_aux { + bool (*parse_map)(io::CodedInputStream*, void*); + }; + map_aux maps; + +#if LANG_CXX11 + AuxillaryParseTableField() = default; +#else + AuxillaryParseTableField() { } +#endif + PROTOBUF_CONSTEXPR AuxillaryParseTableField( + AuxillaryParseTableField::enum_aux e) : enums(e) {} + PROTOBUF_CONSTEXPR AuxillaryParseTableField( + AuxillaryParseTableField::message_aux m) : messages(m) {} + PROTOBUF_CONSTEXPR AuxillaryParseTableField( + AuxillaryParseTableField::string_aux s) : strings(s) {} + PROTOBUF_CONSTEXPR AuxillaryParseTableField( + AuxillaryParseTableField::map_aux m) + : maps(m) {} +}; + +struct ParseTable { + const ParseTableField* fields; + const AuxillaryParseTableField* aux; + int max_field_number; + // TODO(ckennelly): Do something with this padding. + + // TODO(ckennelly): Vet these for sign extension. + int64 has_bits_offset; + int64 oneof_case_offset; + int64 extension_offset; + int64 arena_offset; + + // ExplicitlyInitialized<T> -> T requires a reinterpret_cast, which prevents + // the tables from being constructed as a constexpr. We use void to avoid + // the cast. + const void* default_instance_void; + const MessageLite* default_instance() const { + return static_cast<const MessageLite*>(default_instance_void); + } + + bool unknown_field_set; +}; + +// TODO(jhen): Remove the __NVCC__ check when we get a version of nvcc that +// supports these checks. +#if LANG_CXX11 && !defined(__NVCC__) +static_assert(sizeof(ParseTableField) <= 16, "ParseTableField is too large"); +// The tables must be composed of POD components to ensure link-time +// initialization. +static_assert(std::is_pod<ParseTableField>::value, ""); +static_assert(std::is_pod<AuxillaryParseTableField>::value, ""); +static_assert(std::is_pod<AuxillaryParseTableField::enum_aux>::value, ""); +static_assert(std::is_pod<AuxillaryParseTableField::message_aux>::value, ""); +static_assert(std::is_pod<AuxillaryParseTableField::string_aux>::value, ""); +static_assert(std::is_pod<ParseTable>::value, ""); +#endif + +// TODO(ckennelly): Consolidate these implementations into a single one, using +// dynamic dispatch to the appropriate unknown field handler. +bool MergePartialFromCodedStream(MessageLite* msg, const ParseTable& table, + io::CodedInputStream* input); +bool MergePartialFromCodedStreamLite(MessageLite* msg, const ParseTable& table, + io::CodedInputStream* input); + +template <typename MEntry> +struct MapEntryToMapField; + +template <typename Key, typename Value, WireFormatLite::FieldType kKeyFieldType, + WireFormatLite::FieldType kValueFieldType, int default_enum_value> +struct MapEntryToMapField<MapEntryLite<Key, Value, kKeyFieldType, + kValueFieldType, default_enum_value> > { + typedef MapFieldLite<MapEntryLite<Key, Value, kKeyFieldType, kValueFieldType, + default_enum_value>, + Key, Value, kKeyFieldType, kValueFieldType, + default_enum_value> + MapFieldType; +}; + +template <typename Entry> +bool ParseMap(io::CodedInputStream* input, void* map_field) { + typedef typename MapEntryToMapField<Entry>::MapFieldType MapFieldType; + typedef google::protobuf::Map<typename Entry::EntryKeyType, + typename Entry::EntryValueType> + MapType; + typedef typename Entry::template Parser<MapFieldType, MapType> ParserType; + + ParserType parser(static_cast<MapFieldType*>(map_field)); + return ::google::protobuf::internal::WireFormatLite::ReadMessageNoVirtual(input, + &parser); +} + +} // namespace internal +} // namespace protobuf + +} // namespace google +#endif // GOOGLE_PROTOBUF_GENERATED_MESSAGE_TABLE_DRIVEN_H__ |