third_party/protobuf/3.6.1/src/google/protobuf/generated_message_table_driven_lite.cc

// Protocol Buffers - Google's data interchange format
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// in the documentation and/or other materials provided with the
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#include <google/protobuf/generated_message_table_driven_lite.h>

#include <type_traits>

#include <google/protobuf/io/zero_copy_stream_impl_lite.h>
#include <google/protobuf/metadata_lite.h>
#include <google/protobuf/repeated_field.h>
#include <google/protobuf/wire_format_lite.h>
#include <google/protobuf/wire_format_lite_inl.h>

namespace google {
namespace protobuf {
namespace internal {

namespace {

string* MutableUnknownFields(MessageLite* msg, int64 arena_offset) {
  return Raw<InternalMetadataWithArenaLite>(msg, arena_offset)
      ->mutable_unknown_fields();
}

struct UnknownFieldHandlerLite {
  static bool Skip(MessageLite* msg, const ParseTable& table,
                   io::CodedInputStream* input,
                   int tag) {
    GOOGLE_DCHECK(!table.unknown_field_set);
    ::google::protobuf::io::StringOutputStream unknown_fields_string(
        MutableUnknownFields(msg, table.arena_offset));
    ::google::protobuf::io::CodedOutputStream unknown_fields_stream(
        &unknown_fields_string, false);

    return ::google::protobuf::internal::WireFormatLite::SkipField(
        input, tag, &unknown_fields_stream);
  }

  static void Varint(MessageLite* msg, const ParseTable& table,
                     int tag, int value) {
    GOOGLE_DCHECK(!table.unknown_field_set);

    ::google::protobuf::io::StringOutputStream unknown_fields_string(
        MutableUnknownFields(msg, table.arena_offset));
    ::google::protobuf::io::CodedOutputStream unknown_fields_stream(
        &unknown_fields_string, false);
    unknown_fields_stream.WriteVarint32(tag);
    unknown_fields_stream.WriteVarint32(value);
  }

  static bool ParseExtension(
      MessageLite* msg, const ParseTable& table,
      io::CodedInputStream* input, int tag) {
    ExtensionSet* extensions = GetExtensionSet(msg, table.extension_offset);
    if (extensions == NULL) {
      return false;
    }

    const MessageLite* prototype = table.default_instance();

    GOOGLE_DCHECK(!table.unknown_field_set);
    ::google::protobuf::io::StringOutputStream unknown_fields_string(
        MutableUnknownFields(msg, table.arena_offset));
    ::google::protobuf::io::CodedOutputStream unknown_fields_stream(
        &unknown_fields_string, false);
    return extensions->ParseField(
        tag, input, prototype, &unknown_fields_stream);
  }
};

}  // namespace

bool MergePartialFromCodedStreamLite(
    MessageLite* msg, const ParseTable& table, io::CodedInputStream* input) {
  return MergePartialFromCodedStreamImpl<UnknownFieldHandlerLite,
                                         InternalMetadataWithArenaLite>(
      msg, table, input);
}

}  // namespace internal
}  // namespace protobuf
}  // namespace google