forked from protocolbuffers/protobuf
/
generated_message_reflection.cc
2519 lines (2237 loc) · 94.4 KB
/
generated_message_reflection.cc
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// 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.
#include <google/protobuf/generated_message_reflection.h>
#include <algorithm>
#include <set>
#include <google/protobuf/stubs/logging.h>
#include <google/protobuf/stubs/common.h>
#include <google/protobuf/descriptor.pb.h>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/extension_set.h>
#include <google/protobuf/generated_message_util.h>
#include <google/protobuf/inlined_string_field.h>
#include <google/protobuf/map_field.h>
#include <google/protobuf/map_field_inl.h>
#include <google/protobuf/stubs/mutex.h>
#include <google/protobuf/repeated_field.h>
#include <google/protobuf/unknown_field_set.h>
#include <google/protobuf/wire_format.h>
#include <google/protobuf/stubs/strutil.h>
#include <google/protobuf/port_def.inc>
#define GOOGLE_PROTOBUF_HAS_ONEOF
using google::protobuf::internal::ArenaStringPtr;
using google::protobuf::internal::DescriptorTable;
using google::protobuf::internal::ExtensionSet;
using google::protobuf::internal::GenericTypeHandler;
using google::protobuf::internal::GetEmptyString;
using google::protobuf::internal::InlinedStringField;
using google::protobuf::internal::InternalMetadata;
using google::protobuf::internal::LazyField;
using google::protobuf::internal::MapFieldBase;
using google::protobuf::internal::MigrationSchema;
using google::protobuf::internal::OnShutdownDelete;
using google::protobuf::internal::ReflectionSchema;
using google::protobuf::internal::RepeatedPtrFieldBase;
using google::protobuf::internal::StringSpaceUsedExcludingSelfLong;
using google::protobuf::internal::WrappedMutex;
namespace google {
namespace protobuf {
namespace {
bool IsMapFieldInApi(const FieldDescriptor* field) { return field->is_map(); }
} // anonymous namespace
namespace internal {
bool ParseNamedEnum(const EnumDescriptor* descriptor, ConstStringParam name,
int* value) {
const EnumValueDescriptor* d = descriptor->FindValueByName(name);
if (d == nullptr) return false;
*value = d->number();
return true;
}
const std::string& NameOfEnum(const EnumDescriptor* descriptor, int value) {
const EnumValueDescriptor* d = descriptor->FindValueByNumber(value);
return (d == nullptr ? GetEmptyString() : d->name());
}
} // namespace internal
// ===================================================================
// Helpers for reporting usage errors (e.g. trying to use GetInt32() on
// a string field).
namespace {
using internal::GetConstPointerAtOffset;
using internal::GetConstRefAtOffset;
using internal::GetPointerAtOffset;
void ReportReflectionUsageError(const Descriptor* descriptor,
const FieldDescriptor* field,
const char* method, const char* description) {
GOOGLE_LOG(FATAL) << "Protocol Buffer reflection usage error:\n"
" Method : google::protobuf::Reflection::"
<< method
<< "\n"
" Message type: "
<< descriptor->full_name()
<< "\n"
" Field : "
<< field->full_name()
<< "\n"
" Problem : "
<< description;
}
const char* cpptype_names_[FieldDescriptor::MAX_CPPTYPE + 1] = {
"INVALID_CPPTYPE", "CPPTYPE_INT32", "CPPTYPE_INT64", "CPPTYPE_UINT32",
"CPPTYPE_UINT64", "CPPTYPE_DOUBLE", "CPPTYPE_FLOAT", "CPPTYPE_BOOL",
"CPPTYPE_ENUM", "CPPTYPE_STRING", "CPPTYPE_MESSAGE"};
static void ReportReflectionUsageTypeError(
const Descriptor* descriptor, const FieldDescriptor* field,
const char* method, FieldDescriptor::CppType expected_type) {
GOOGLE_LOG(FATAL)
<< "Protocol Buffer reflection usage error:\n"
" Method : google::protobuf::Reflection::"
<< method
<< "\n"
" Message type: "
<< descriptor->full_name()
<< "\n"
" Field : "
<< field->full_name()
<< "\n"
" Problem : Field is not the right type for this message:\n"
" Expected : "
<< cpptype_names_[expected_type]
<< "\n"
" Field type: "
<< cpptype_names_[field->cpp_type()];
}
static void ReportReflectionUsageEnumTypeError(
const Descriptor* descriptor, const FieldDescriptor* field,
const char* method, const EnumValueDescriptor* value) {
GOOGLE_LOG(FATAL) << "Protocol Buffer reflection usage error:\n"
" Method : google::protobuf::Reflection::"
<< method
<< "\n"
" Message type: "
<< descriptor->full_name()
<< "\n"
" Field : "
<< field->full_name()
<< "\n"
" Problem : Enum value did not match field type:\n"
" Expected : "
<< field->enum_type()->full_name()
<< "\n"
" Actual : "
<< value->full_name();
}
inline void CheckInvalidAccess(const internal::ReflectionSchema& schema,
const FieldDescriptor* field) {
GOOGLE_CHECK(!schema.IsFieldStripped(field))
<< "invalid access to a stripped field " << field->full_name();
}
#define USAGE_CHECK(CONDITION, METHOD, ERROR_DESCRIPTION) \
if (!(CONDITION)) \
ReportReflectionUsageError(descriptor_, field, #METHOD, ERROR_DESCRIPTION)
#define USAGE_CHECK_EQ(A, B, METHOD, ERROR_DESCRIPTION) \
USAGE_CHECK((A) == (B), METHOD, ERROR_DESCRIPTION)
#define USAGE_CHECK_NE(A, B, METHOD, ERROR_DESCRIPTION) \
USAGE_CHECK((A) != (B), METHOD, ERROR_DESCRIPTION)
#define USAGE_CHECK_TYPE(METHOD, CPPTYPE) \
if (field->cpp_type() != FieldDescriptor::CPPTYPE_##CPPTYPE) \
ReportReflectionUsageTypeError(descriptor_, field, #METHOD, \
FieldDescriptor::CPPTYPE_##CPPTYPE)
#define USAGE_CHECK_ENUM_VALUE(METHOD) \
if (value->type() != field->enum_type()) \
ReportReflectionUsageEnumTypeError(descriptor_, field, #METHOD, value)
#define USAGE_CHECK_MESSAGE_TYPE(METHOD) \
USAGE_CHECK_EQ(field->containing_type(), descriptor_, METHOD, \
"Field does not match message type.");
#define USAGE_CHECK_SINGULAR(METHOD) \
USAGE_CHECK_NE(field->label(), FieldDescriptor::LABEL_REPEATED, METHOD, \
"Field is repeated; the method requires a singular field.")
#define USAGE_CHECK_REPEATED(METHOD) \
USAGE_CHECK_EQ(field->label(), FieldDescriptor::LABEL_REPEATED, METHOD, \
"Field is singular; the method requires a repeated field.")
#define USAGE_CHECK_ALL(METHOD, LABEL, CPPTYPE) \
USAGE_CHECK_MESSAGE_TYPE(METHOD); \
USAGE_CHECK_##LABEL(METHOD); \
USAGE_CHECK_TYPE(METHOD, CPPTYPE)
} // namespace
// ===================================================================
Reflection::Reflection(const Descriptor* descriptor,
const internal::ReflectionSchema& schema,
const DescriptorPool* pool, MessageFactory* factory)
: descriptor_(descriptor),
schema_(schema),
descriptor_pool_(
(pool == nullptr) ? DescriptorPool::internal_generated_pool() : pool),
message_factory_(factory),
last_non_weak_field_index_(-1) {
last_non_weak_field_index_ = descriptor_->field_count() - 1;
}
const UnknownFieldSet& Reflection::GetUnknownFields(
const Message& message) const {
return GetInternalMetadata(message).unknown_fields<UnknownFieldSet>(
UnknownFieldSet::default_instance);
}
UnknownFieldSet* Reflection::MutableUnknownFields(Message* message) const {
return MutableInternalMetadata(message)
->mutable_unknown_fields<UnknownFieldSet>();
}
size_t Reflection::SpaceUsedLong(const Message& message) const {
// object_size_ already includes the in-memory representation of each field
// in the message, so we only need to account for additional memory used by
// the fields.
size_t total_size = schema_.GetObjectSize();
total_size += GetUnknownFields(message).SpaceUsedExcludingSelfLong();
if (schema_.HasExtensionSet()) {
total_size += GetExtensionSet(message).SpaceUsedExcludingSelfLong();
}
for (int i = 0; i <= last_non_weak_field_index_; i++) {
const FieldDescriptor* field = descriptor_->field(i);
if (field->is_repeated()) {
switch (field->cpp_type()) {
#define HANDLE_TYPE(UPPERCASE, LOWERCASE) \
case FieldDescriptor::CPPTYPE_##UPPERCASE: \
total_size += GetRaw<RepeatedField<LOWERCASE> >(message, field) \
.SpaceUsedExcludingSelfLong(); \
break
HANDLE_TYPE(INT32, int32);
HANDLE_TYPE(INT64, int64);
HANDLE_TYPE(UINT32, uint32);
HANDLE_TYPE(UINT64, uint64);
HANDLE_TYPE(DOUBLE, double);
HANDLE_TYPE(FLOAT, float);
HANDLE_TYPE(BOOL, bool);
HANDLE_TYPE(ENUM, int);
#undef HANDLE_TYPE
case FieldDescriptor::CPPTYPE_STRING:
switch (field->options().ctype()) {
default: // TODO(kenton): Support other string reps.
case FieldOptions::STRING:
total_size +=
GetRaw<RepeatedPtrField<std::string> >(message, field)
.SpaceUsedExcludingSelfLong();
break;
}
break;
case FieldDescriptor::CPPTYPE_MESSAGE:
if (IsMapFieldInApi(field)) {
total_size += GetRaw<internal::MapFieldBase>(message, field)
.SpaceUsedExcludingSelfLong();
} else {
// We don't know which subclass of RepeatedPtrFieldBase the type is,
// so we use RepeatedPtrFieldBase directly.
total_size +=
GetRaw<RepeatedPtrFieldBase>(message, field)
.SpaceUsedExcludingSelfLong<GenericTypeHandler<Message> >();
}
break;
}
} else {
if (schema_.InRealOneof(field) && !HasOneofField(message, field)) {
continue;
}
switch (field->cpp_type()) {
case FieldDescriptor::CPPTYPE_INT32:
case FieldDescriptor::CPPTYPE_INT64:
case FieldDescriptor::CPPTYPE_UINT32:
case FieldDescriptor::CPPTYPE_UINT64:
case FieldDescriptor::CPPTYPE_DOUBLE:
case FieldDescriptor::CPPTYPE_FLOAT:
case FieldDescriptor::CPPTYPE_BOOL:
case FieldDescriptor::CPPTYPE_ENUM:
// Field is inline, so we've already counted it.
break;
case FieldDescriptor::CPPTYPE_STRING: {
switch (field->options().ctype()) {
default: // TODO(kenton): Support other string reps.
case FieldOptions::STRING: {
if (IsInlined(field)) {
const std::string* ptr =
&GetField<InlinedStringField>(message, field).GetNoArena();
total_size += StringSpaceUsedExcludingSelfLong(*ptr);
break;
}
// Initially, the string points to the default value stored
// in the prototype. Only count the string if it has been
// changed from the default value.
const std::string* default_ptr =
&DefaultRaw<ArenaStringPtr>(field).Get();
const std::string* ptr =
&GetField<ArenaStringPtr>(message, field).Get();
if (ptr != default_ptr) {
// string fields are represented by just a pointer, so also
// include sizeof(string) as well.
total_size +=
sizeof(*ptr) + StringSpaceUsedExcludingSelfLong(*ptr);
}
break;
}
}
break;
}
case FieldDescriptor::CPPTYPE_MESSAGE:
if (schema_.IsDefaultInstance(message)) {
// For singular fields, the prototype just stores a pointer to the
// external type's prototype, so there is no extra memory usage.
} else {
const Message* sub_message = GetRaw<const Message*>(message, field);
if (sub_message != nullptr) {
total_size += sub_message->SpaceUsedLong();
}
}
break;
}
}
}
return total_size;
}
void Reflection::SwapField(Message* message1, Message* message2,
const FieldDescriptor* field) const {
CheckInvalidAccess(schema_, field);
if (field->is_repeated()) {
switch (field->cpp_type()) {
#define SWAP_ARRAYS(CPPTYPE, TYPE) \
case FieldDescriptor::CPPTYPE_##CPPTYPE: \
MutableRaw<RepeatedField<TYPE> >(message1, field) \
->Swap(MutableRaw<RepeatedField<TYPE> >(message2, field)); \
break;
SWAP_ARRAYS(INT32, int32);
SWAP_ARRAYS(INT64, int64);
SWAP_ARRAYS(UINT32, uint32);
SWAP_ARRAYS(UINT64, uint64);
SWAP_ARRAYS(FLOAT, float);
SWAP_ARRAYS(DOUBLE, double);
SWAP_ARRAYS(BOOL, bool);
SWAP_ARRAYS(ENUM, int);
#undef SWAP_ARRAYS
case FieldDescriptor::CPPTYPE_STRING:
switch (field->options().ctype()) {
default: // TODO(kenton): Support other string reps.
case FieldOptions::STRING:
MutableRaw<RepeatedPtrFieldBase>(message1, field)
->Swap<GenericTypeHandler<std::string> >(
MutableRaw<RepeatedPtrFieldBase>(message2, field));
break;
}
break;
case FieldDescriptor::CPPTYPE_MESSAGE:
if (IsMapFieldInApi(field)) {
MutableRaw<MapFieldBase>(message1, field)
->Swap(MutableRaw<MapFieldBase>(message2, field));
} else {
MutableRaw<RepeatedPtrFieldBase>(message1, field)
->Swap<GenericTypeHandler<Message> >(
MutableRaw<RepeatedPtrFieldBase>(message2, field));
}
break;
default:
GOOGLE_LOG(FATAL) << "Unimplemented type: " << field->cpp_type();
}
} else {
switch (field->cpp_type()) {
#define SWAP_VALUES(CPPTYPE, TYPE) \
case FieldDescriptor::CPPTYPE_##CPPTYPE: \
std::swap(*MutableRaw<TYPE>(message1, field), \
*MutableRaw<TYPE>(message2, field)); \
break;
SWAP_VALUES(INT32, int32);
SWAP_VALUES(INT64, int64);
SWAP_VALUES(UINT32, uint32);
SWAP_VALUES(UINT64, uint64);
SWAP_VALUES(FLOAT, float);
SWAP_VALUES(DOUBLE, double);
SWAP_VALUES(BOOL, bool);
SWAP_VALUES(ENUM, int);
#undef SWAP_VALUES
case FieldDescriptor::CPPTYPE_MESSAGE:
if (GetArena(message1) == GetArena(message2)) {
std::swap(*MutableRaw<Message*>(message1, field),
*MutableRaw<Message*>(message2, field));
} else {
Message** sub_msg1 = MutableRaw<Message*>(message1, field);
Message** sub_msg2 = MutableRaw<Message*>(message2, field);
if (*sub_msg1 == nullptr && *sub_msg2 == nullptr) break;
if (*sub_msg1 && *sub_msg2) {
(*sub_msg1)->GetReflection()->Swap(*sub_msg1, *sub_msg2);
break;
}
if (*sub_msg1 == nullptr) {
*sub_msg1 = (*sub_msg2)->New(message1->GetArena());
(*sub_msg1)->CopyFrom(**sub_msg2);
ClearField(message2, field);
} else {
*sub_msg2 = (*sub_msg1)->New(message2->GetArena());
(*sub_msg2)->CopyFrom(**sub_msg1);
ClearField(message1, field);
}
}
break;
case FieldDescriptor::CPPTYPE_STRING:
switch (field->options().ctype()) {
default: // TODO(kenton): Support other string reps.
case FieldOptions::STRING: {
Arena* arena1 = GetArena(message1);
Arena* arena2 = GetArena(message2);
if (IsInlined(field)) {
InlinedStringField* string1 =
MutableRaw<InlinedStringField>(message1, field);
InlinedStringField* string2 =
MutableRaw<InlinedStringField>(message2, field);
string1->Swap(string2);
break;
}
ArenaStringPtr* string1 =
MutableRaw<ArenaStringPtr>(message1, field);
ArenaStringPtr* string2 =
MutableRaw<ArenaStringPtr>(message2, field);
const std::string* default_ptr =
&DefaultRaw<ArenaStringPtr>(field).Get();
if (arena1 == arena2) {
string1->Swap(string2, default_ptr, arena1);
} else {
const std::string temp = string1->Get();
string1->Set(default_ptr, string2->Get(), arena1);
string2->Set(default_ptr, temp, arena2);
}
} break;
}
break;
default:
GOOGLE_LOG(FATAL) << "Unimplemented type: " << field->cpp_type();
}
}
}
void Reflection::SwapOneofField(Message* message1, Message* message2,
const OneofDescriptor* oneof_descriptor) const {
GOOGLE_DCHECK(!oneof_descriptor->is_synthetic());
uint32 oneof_case1 = GetOneofCase(*message1, oneof_descriptor);
uint32 oneof_case2 = GetOneofCase(*message2, oneof_descriptor);
int32 temp_int32;
int64 temp_int64;
uint32 temp_uint32;
uint64 temp_uint64;
float temp_float;
double temp_double;
bool temp_bool;
int temp_int;
Message* temp_message = nullptr;
std::string temp_string;
// Stores message1's oneof field to a temp variable.
const FieldDescriptor* field1 = nullptr;
if (oneof_case1 > 0) {
field1 = descriptor_->FindFieldByNumber(oneof_case1);
// oneof_descriptor->field(oneof_case1);
switch (field1->cpp_type()) {
#define GET_TEMP_VALUE(CPPTYPE, TYPE) \
case FieldDescriptor::CPPTYPE_##CPPTYPE: \
temp_##TYPE = GetField<TYPE>(*message1, field1); \
break;
GET_TEMP_VALUE(INT32, int32);
GET_TEMP_VALUE(INT64, int64);
GET_TEMP_VALUE(UINT32, uint32);
GET_TEMP_VALUE(UINT64, uint64);
GET_TEMP_VALUE(FLOAT, float);
GET_TEMP_VALUE(DOUBLE, double);
GET_TEMP_VALUE(BOOL, bool);
GET_TEMP_VALUE(ENUM, int);
#undef GET_TEMP_VALUE
case FieldDescriptor::CPPTYPE_MESSAGE:
temp_message = ReleaseMessage(message1, field1);
break;
case FieldDescriptor::CPPTYPE_STRING:
temp_string = GetString(*message1, field1);
break;
default:
GOOGLE_LOG(FATAL) << "Unimplemented type: " << field1->cpp_type();
}
}
// Sets message1's oneof field from the message2's oneof field.
if (oneof_case2 > 0) {
const FieldDescriptor* field2 = descriptor_->FindFieldByNumber(oneof_case2);
switch (field2->cpp_type()) {
#define SET_ONEOF_VALUE1(CPPTYPE, TYPE) \
case FieldDescriptor::CPPTYPE_##CPPTYPE: \
SetField<TYPE>(message1, field2, GetField<TYPE>(*message2, field2)); \
break;
SET_ONEOF_VALUE1(INT32, int32);
SET_ONEOF_VALUE1(INT64, int64);
SET_ONEOF_VALUE1(UINT32, uint32);
SET_ONEOF_VALUE1(UINT64, uint64);
SET_ONEOF_VALUE1(FLOAT, float);
SET_ONEOF_VALUE1(DOUBLE, double);
SET_ONEOF_VALUE1(BOOL, bool);
SET_ONEOF_VALUE1(ENUM, int);
#undef SET_ONEOF_VALUE1
case FieldDescriptor::CPPTYPE_MESSAGE:
SetAllocatedMessage(message1, ReleaseMessage(message2, field2), field2);
break;
case FieldDescriptor::CPPTYPE_STRING:
SetString(message1, field2, GetString(*message2, field2));
break;
default:
GOOGLE_LOG(FATAL) << "Unimplemented type: " << field2->cpp_type();
}
} else {
ClearOneof(message1, oneof_descriptor);
}
// Sets message2's oneof field from the temp variable.
if (oneof_case1 > 0) {
switch (field1->cpp_type()) {
#define SET_ONEOF_VALUE2(CPPTYPE, TYPE) \
case FieldDescriptor::CPPTYPE_##CPPTYPE: \
SetField<TYPE>(message2, field1, temp_##TYPE); \
break;
SET_ONEOF_VALUE2(INT32, int32);
SET_ONEOF_VALUE2(INT64, int64);
SET_ONEOF_VALUE2(UINT32, uint32);
SET_ONEOF_VALUE2(UINT64, uint64);
SET_ONEOF_VALUE2(FLOAT, float);
SET_ONEOF_VALUE2(DOUBLE, double);
SET_ONEOF_VALUE2(BOOL, bool);
SET_ONEOF_VALUE2(ENUM, int);
#undef SET_ONEOF_VALUE2
case FieldDescriptor::CPPTYPE_MESSAGE:
SetAllocatedMessage(message2, temp_message, field1);
break;
case FieldDescriptor::CPPTYPE_STRING:
SetString(message2, field1, temp_string);
break;
default:
GOOGLE_LOG(FATAL) << "Unimplemented type: " << field1->cpp_type();
}
} else {
ClearOneof(message2, oneof_descriptor);
}
}
void Reflection::Swap(Message* message1, Message* message2) const {
if (message1 == message2) return;
// TODO(kenton): Other Reflection methods should probably check this too.
GOOGLE_CHECK_EQ(message1->GetReflection(), this)
<< "First argument to Swap() (of type \""
<< message1->GetDescriptor()->full_name()
<< "\") is not compatible with this reflection object (which is for type "
"\""
<< descriptor_->full_name()
<< "\"). Note that the exact same class is required; not just the same "
"descriptor.";
GOOGLE_CHECK_EQ(message2->GetReflection(), this)
<< "Second argument to Swap() (of type \""
<< message2->GetDescriptor()->full_name()
<< "\") is not compatible with this reflection object (which is for type "
"\""
<< descriptor_->full_name()
<< "\"). Note that the exact same class is required; not just the same "
"descriptor.";
// Check that both messages are in the same arena (or both on the heap). We
// need to copy all data if not, due to ownership semantics.
if (GetArena(message1) != GetArena(message2)) {
// Slow copy path.
// Use our arena as temp space, if available.
Message* temp = message1->New(GetArena(message1));
temp->MergeFrom(*message2);
message2->CopyFrom(*message1);
Swap(message1, temp);
if (GetArena(message1) == nullptr) {
delete temp;
}
return;
}
if (schema_.HasHasbits()) {
uint32* has_bits1 = MutableHasBits(message1);
uint32* has_bits2 = MutableHasBits(message2);
int fields_with_has_bits = 0;
for (int i = 0; i < descriptor_->field_count(); i++) {
const FieldDescriptor* field = descriptor_->field(i);
if (field->is_repeated() || schema_.InRealOneof(field)) {
continue;
}
fields_with_has_bits++;
}
int has_bits_size = (fields_with_has_bits + 31) / 32;
for (int i = 0; i < has_bits_size; i++) {
std::swap(has_bits1[i], has_bits2[i]);
}
}
for (int i = 0; i <= last_non_weak_field_index_; i++) {
const FieldDescriptor* field = descriptor_->field(i);
if (schema_.InRealOneof(field)) continue;
if (schema_.IsFieldStripped(field)) continue;
SwapField(message1, message2, field);
}
const int oneof_decl_count = descriptor_->oneof_decl_count();
for (int i = 0; i < oneof_decl_count; i++) {
const OneofDescriptor* oneof = descriptor_->oneof_decl(i);
if (!oneof->is_synthetic()) {
SwapOneofField(message1, message2, oneof);
}
}
if (schema_.HasExtensionSet()) {
MutableExtensionSet(message1)->Swap(MutableExtensionSet(message2));
}
MutableUnknownFields(message1)->Swap(MutableUnknownFields(message2));
}
void Reflection::SwapFields(
Message* message1, Message* message2,
const std::vector<const FieldDescriptor*>& fields) const {
if (message1 == message2) return;
// TODO(kenton): Other Reflection methods should probably check this too.
GOOGLE_CHECK_EQ(message1->GetReflection(), this)
<< "First argument to SwapFields() (of type \""
<< message1->GetDescriptor()->full_name()
<< "\") is not compatible with this reflection object (which is for type "
"\""
<< descriptor_->full_name()
<< "\"). Note that the exact same class is required; not just the same "
"descriptor.";
GOOGLE_CHECK_EQ(message2->GetReflection(), this)
<< "Second argument to SwapFields() (of type \""
<< message2->GetDescriptor()->full_name()
<< "\") is not compatible with this reflection object (which is for type "
"\""
<< descriptor_->full_name()
<< "\"). Note that the exact same class is required; not just the same "
"descriptor.";
std::set<int> swapped_oneof;
const int fields_size = static_cast<int>(fields.size());
for (int i = 0; i < fields_size; i++) {
const FieldDescriptor* field = fields[i];
CheckInvalidAccess(schema_, field);
if (field->is_extension()) {
MutableExtensionSet(message1)->SwapExtension(
MutableExtensionSet(message2), field->number());
} else {
if (schema_.InRealOneof(field)) {
int oneof_index = field->containing_oneof()->index();
// Only swap the oneof field once.
if (swapped_oneof.find(oneof_index) != swapped_oneof.end()) {
continue;
}
swapped_oneof.insert(oneof_index);
SwapOneofField(message1, message2, field->containing_oneof());
} else {
// Swap has bit for non-repeated fields. We have already checked for
// oneof already.
if (!field->is_repeated()) {
SwapBit(message1, message2, field);
}
// Swap field.
SwapField(message1, message2, field);
}
}
}
}
// -------------------------------------------------------------------
bool Reflection::HasField(const Message& message,
const FieldDescriptor* field) const {
USAGE_CHECK_MESSAGE_TYPE(HasField);
USAGE_CHECK_SINGULAR(HasField);
CheckInvalidAccess(schema_, field);
if (field->is_extension()) {
return GetExtensionSet(message).Has(field->number());
} else {
if (schema_.InRealOneof(field)) {
return HasOneofField(message, field);
} else {
return HasBit(message, field);
}
}
}
int Reflection::FieldSize(const Message& message,
const FieldDescriptor* field) const {
USAGE_CHECK_MESSAGE_TYPE(FieldSize);
USAGE_CHECK_REPEATED(FieldSize);
CheckInvalidAccess(schema_, field);
if (field->is_extension()) {
return GetExtensionSet(message).ExtensionSize(field->number());
} else {
switch (field->cpp_type()) {
#define HANDLE_TYPE(UPPERCASE, LOWERCASE) \
case FieldDescriptor::CPPTYPE_##UPPERCASE: \
return GetRaw<RepeatedField<LOWERCASE> >(message, field).size()
HANDLE_TYPE(INT32, int32);
HANDLE_TYPE(INT64, int64);
HANDLE_TYPE(UINT32, uint32);
HANDLE_TYPE(UINT64, uint64);
HANDLE_TYPE(DOUBLE, double);
HANDLE_TYPE(FLOAT, float);
HANDLE_TYPE(BOOL, bool);
HANDLE_TYPE(ENUM, int);
#undef HANDLE_TYPE
case FieldDescriptor::CPPTYPE_STRING:
case FieldDescriptor::CPPTYPE_MESSAGE:
if (IsMapFieldInApi(field)) {
const internal::MapFieldBase& map =
GetRaw<MapFieldBase>(message, field);
if (map.IsRepeatedFieldValid()) {
return map.GetRepeatedField().size();
} else {
// No need to materialize the repeated field if it is out of sync:
// its size will be the same as the map's size.
return map.size();
}
} else {
return GetRaw<RepeatedPtrFieldBase>(message, field).size();
}
}
GOOGLE_LOG(FATAL) << "Can't get here.";
return 0;
}
}
void Reflection::ClearField(Message* message,
const FieldDescriptor* field) const {
USAGE_CHECK_MESSAGE_TYPE(ClearField);
CheckInvalidAccess(schema_, field);
if (field->is_extension()) {
MutableExtensionSet(message)->ClearExtension(field->number());
} else if (!field->is_repeated()) {
if (schema_.InRealOneof(field)) {
ClearOneofField(message, field);
return;
}
if (HasBit(*message, field)) {
ClearBit(message, field);
// We need to set the field back to its default value.
switch (field->cpp_type()) {
#define CLEAR_TYPE(CPPTYPE, TYPE) \
case FieldDescriptor::CPPTYPE_##CPPTYPE: \
*MutableRaw<TYPE>(message, field) = field->default_value_##TYPE(); \
break;
CLEAR_TYPE(INT32, int32);
CLEAR_TYPE(INT64, int64);
CLEAR_TYPE(UINT32, uint32);
CLEAR_TYPE(UINT64, uint64);
CLEAR_TYPE(FLOAT, float);
CLEAR_TYPE(DOUBLE, double);
CLEAR_TYPE(BOOL, bool);
#undef CLEAR_TYPE
case FieldDescriptor::CPPTYPE_ENUM:
*MutableRaw<int>(message, field) =
field->default_value_enum()->number();
break;
case FieldDescriptor::CPPTYPE_STRING: {
switch (field->options().ctype()) {
default: // TODO(kenton): Support other string reps.
case FieldOptions::STRING: {
if (IsInlined(field)) {
const std::string* default_ptr =
&DefaultRaw<InlinedStringField>(field).GetNoArena();
MutableRaw<InlinedStringField>(message, field)
->SetNoArena(default_ptr, *default_ptr);
break;
}
const std::string* default_ptr =
&DefaultRaw<ArenaStringPtr>(field).Get();
MutableRaw<ArenaStringPtr>(message, field)
->SetAllocated(default_ptr, nullptr, GetArena(message));
break;
}
}
break;
}
case FieldDescriptor::CPPTYPE_MESSAGE:
if (schema_.HasBitIndex(field) == -1) {
// Proto3 does not have has-bits and we need to set a message field
// to nullptr in order to indicate its un-presence.
if (GetArena(message) == nullptr) {
delete *MutableRaw<Message*>(message, field);
}
*MutableRaw<Message*>(message, field) = nullptr;
} else {
(*MutableRaw<Message*>(message, field))->Clear();
}
break;
}
}
} else {
switch (field->cpp_type()) {
#define HANDLE_TYPE(UPPERCASE, LOWERCASE) \
case FieldDescriptor::CPPTYPE_##UPPERCASE: \
MutableRaw<RepeatedField<LOWERCASE> >(message, field)->Clear(); \
break
HANDLE_TYPE(INT32, int32);
HANDLE_TYPE(INT64, int64);
HANDLE_TYPE(UINT32, uint32);
HANDLE_TYPE(UINT64, uint64);
HANDLE_TYPE(DOUBLE, double);
HANDLE_TYPE(FLOAT, float);
HANDLE_TYPE(BOOL, bool);
HANDLE_TYPE(ENUM, int);
#undef HANDLE_TYPE
case FieldDescriptor::CPPTYPE_STRING: {
switch (field->options().ctype()) {
default: // TODO(kenton): Support other string reps.
case FieldOptions::STRING:
MutableRaw<RepeatedPtrField<std::string> >(message, field)->Clear();
break;
}
break;
}
case FieldDescriptor::CPPTYPE_MESSAGE: {
if (IsMapFieldInApi(field)) {
MutableRaw<MapFieldBase>(message, field)->Clear();
} else {
// We don't know which subclass of RepeatedPtrFieldBase the type is,
// so we use RepeatedPtrFieldBase directly.
MutableRaw<RepeatedPtrFieldBase>(message, field)
->Clear<GenericTypeHandler<Message> >();
}
break;
}
}
}
}
void Reflection::RemoveLast(Message* message,
const FieldDescriptor* field) const {
USAGE_CHECK_MESSAGE_TYPE(RemoveLast);
USAGE_CHECK_REPEATED(RemoveLast);
CheckInvalidAccess(schema_, field);
if (field->is_extension()) {
MutableExtensionSet(message)->RemoveLast(field->number());
} else {
switch (field->cpp_type()) {
#define HANDLE_TYPE(UPPERCASE, LOWERCASE) \
case FieldDescriptor::CPPTYPE_##UPPERCASE: \
MutableRaw<RepeatedField<LOWERCASE> >(message, field)->RemoveLast(); \
break
HANDLE_TYPE(INT32, int32);
HANDLE_TYPE(INT64, int64);
HANDLE_TYPE(UINT32, uint32);
HANDLE_TYPE(UINT64, uint64);
HANDLE_TYPE(DOUBLE, double);
HANDLE_TYPE(FLOAT, float);
HANDLE_TYPE(BOOL, bool);
HANDLE_TYPE(ENUM, int);
#undef HANDLE_TYPE
case FieldDescriptor::CPPTYPE_STRING:
switch (field->options().ctype()) {
default: // TODO(kenton): Support other string reps.
case FieldOptions::STRING:
MutableRaw<RepeatedPtrField<std::string> >(message, field)
->RemoveLast();
break;
}
break;
case FieldDescriptor::CPPTYPE_MESSAGE:
if (IsMapFieldInApi(field)) {
MutableRaw<MapFieldBase>(message, field)
->MutableRepeatedField()
->RemoveLast<GenericTypeHandler<Message> >();
} else {
MutableRaw<RepeatedPtrFieldBase>(message, field)
->RemoveLast<GenericTypeHandler<Message> >();
}
break;
}
}
}
Message* Reflection::ReleaseLast(Message* message,
const FieldDescriptor* field) const {
USAGE_CHECK_ALL(ReleaseLast, REPEATED, MESSAGE);
CheckInvalidAccess(schema_, field);
if (field->is_extension()) {
return static_cast<Message*>(
MutableExtensionSet(message)->ReleaseLast(field->number()));
} else {
if (IsMapFieldInApi(field)) {
return MutableRaw<MapFieldBase>(message, field)
->MutableRepeatedField()
->ReleaseLast<GenericTypeHandler<Message> >();
} else {
return MutableRaw<RepeatedPtrFieldBase>(message, field)
->ReleaseLast<GenericTypeHandler<Message> >();
}
}
}
void Reflection::SwapElements(Message* message, const FieldDescriptor* field,
int index1, int index2) const {
USAGE_CHECK_MESSAGE_TYPE(Swap);
USAGE_CHECK_REPEATED(Swap);
CheckInvalidAccess(schema_, field);
if (field->is_extension()) {
MutableExtensionSet(message)->SwapElements(field->number(), index1, index2);
} else {
switch (field->cpp_type()) {
#define HANDLE_TYPE(UPPERCASE, LOWERCASE) \
case FieldDescriptor::CPPTYPE_##UPPERCASE: \
MutableRaw<RepeatedField<LOWERCASE> >(message, field) \
->SwapElements(index1, index2); \
break
HANDLE_TYPE(INT32, int32);
HANDLE_TYPE(INT64, int64);
HANDLE_TYPE(UINT32, uint32);
HANDLE_TYPE(UINT64, uint64);