Source code
Revision control
Copy as Markdown
Other Tools
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
//
// 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_MAP_FIELD_INL_H__
#define GOOGLE_PROTOBUF_MAP_FIELD_INL_H__
#include <memory>
#include <google/protobuf/stubs/casts.h>
#include <google/protobuf/map.h>
#include <google/protobuf/map_field.h>
#include <google/protobuf/map_type_handler.h>
#ifdef SWIG
#error "You cannot SWIG proto headers"
#endif
namespace google {
namespace protobuf {
namespace internal {
// UnwrapMapKey template
template <typename T>
T UnwrapMapKey(const MapKey& map_key);
template <>
inline int32_t UnwrapMapKey<int32_t>(const MapKey& map_key) {
return map_key.GetInt32Value();
}
template <>
inline uint32_t UnwrapMapKey<uint32_t>(const MapKey& map_key) {
return map_key.GetUInt32Value();
}
template <>
inline int64_t UnwrapMapKey<int64_t>(const MapKey& map_key) {
return map_key.GetInt64Value();
}
template <>
inline uint64_t UnwrapMapKey<uint64_t>(const MapKey& map_key) {
return map_key.GetUInt64Value();
}
template <>
inline bool UnwrapMapKey<bool>(const MapKey& map_key) {
return map_key.GetBoolValue();
}
template <>
inline std::string UnwrapMapKey<std::string>(const MapKey& map_key) {
return map_key.GetStringValue();
}
// SetMapKey template
template <typename T>
inline void SetMapKey(MapKey* map_key, const T& value);
template <>
inline void SetMapKey<int32_t>(MapKey* map_key, const int32_t& value) {
map_key->SetInt32Value(value);
}
template <>
inline void SetMapKey<uint32_t>(MapKey* map_key, const uint32_t& value) {
map_key->SetUInt32Value(value);
}
template <>
inline void SetMapKey<int64_t>(MapKey* map_key, const int64_t& value) {
map_key->SetInt64Value(value);
}
template <>
inline void SetMapKey<uint64_t>(MapKey* map_key, const uint64_t& value) {
map_key->SetUInt64Value(value);
}
template <>
inline void SetMapKey<bool>(MapKey* map_key, const bool& value) {
map_key->SetBoolValue(value);
}
template <>
inline void SetMapKey<std::string>(MapKey* map_key, const std::string& value) {
map_key->SetStringValue(value);
}
// ------------------------TypeDefinedMapFieldBase---------------
template <typename Key, typename T>
typename Map<Key, T>::const_iterator&
TypeDefinedMapFieldBase<Key, T>::InternalGetIterator(
const MapIterator* map_iter) const {
return *reinterpret_cast<typename Map<Key, T>::const_iterator*>(
map_iter->iter_);
}
template <typename Key, typename T>
void TypeDefinedMapFieldBase<Key, T>::MapBegin(MapIterator* map_iter) const {
InternalGetIterator(map_iter) = GetMap().begin();
SetMapIteratorValue(map_iter);
}
template <typename Key, typename T>
void TypeDefinedMapFieldBase<Key, T>::MapEnd(MapIterator* map_iter) const {
InternalGetIterator(map_iter) = GetMap().end();
}
template <typename Key, typename T>
bool TypeDefinedMapFieldBase<Key, T>::EqualIterator(
const MapIterator& a, const MapIterator& b) const {
return InternalGetIterator(&a) == InternalGetIterator(&b);
}
template <typename Key, typename T>
void TypeDefinedMapFieldBase<Key, T>::IncreaseIterator(
MapIterator* map_iter) const {
++InternalGetIterator(map_iter);
SetMapIteratorValue(map_iter);
}
template <typename Key, typename T>
void TypeDefinedMapFieldBase<Key, T>::InitializeIterator(
MapIterator* map_iter) const {
map_iter->iter_ = new typename Map<Key, T>::const_iterator;
GOOGLE_CHECK(map_iter->iter_ != nullptr);
}
template <typename Key, typename T>
void TypeDefinedMapFieldBase<Key, T>::DeleteIterator(
MapIterator* map_iter) const {
delete reinterpret_cast<typename Map<Key, T>::const_iterator*>(
map_iter->iter_);
}
template <typename Key, typename T>
void TypeDefinedMapFieldBase<Key, T>::CopyIterator(
MapIterator* this_iter, const MapIterator& that_iter) const {
InternalGetIterator(this_iter) = InternalGetIterator(&that_iter);
this_iter->key_.SetType(that_iter.key_.type());
// MapValueRef::type() fails when containing data is null. However, if
// this_iter points to MapEnd, data can be null.
this_iter->value_.SetType(
static_cast<FieldDescriptor::CppType>(that_iter.value_.type_));
SetMapIteratorValue(this_iter);
}
// ----------------------------------------------------------------------
template <typename Derived, typename Key, typename T,
WireFormatLite::FieldType kKeyFieldType,
WireFormatLite::FieldType kValueFieldType>
int MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::size() const {
MapFieldBase::SyncMapWithRepeatedField();
return static_cast<int>(impl_.GetMap().size());
}
template <typename Derived, typename Key, typename T,
WireFormatLite::FieldType kKeyFieldType,
WireFormatLite::FieldType kValueFieldType>
void MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::Clear() {
if (this->MapFieldBase::repeated_field_ != nullptr) {
RepeatedPtrField<EntryType>* repeated_field =
reinterpret_cast<RepeatedPtrField<EntryType>*>(
this->MapFieldBase::repeated_field_);
repeated_field->Clear();
}
impl_.MutableMap()->clear();
// Data in map and repeated field are both empty, but we can't set status
// CLEAN. Because clear is a generated API, we cannot invalidate previous
// reference to map.
MapFieldBase::SetMapDirty();
}
template <typename Derived, typename Key, typename T,
WireFormatLite::FieldType kKeyFieldType,
WireFormatLite::FieldType kValueFieldType>
void MapField<Derived, Key, T, kKeyFieldType,
kValueFieldType>::SetMapIteratorValue(MapIterator* map_iter)
const {
const Map<Key, T>& map = impl_.GetMap();
typename Map<Key, T>::const_iterator iter =
TypeDefinedMapFieldBase<Key, T>::InternalGetIterator(map_iter);
if (iter == map.end()) return;
SetMapKey(&map_iter->key_, iter->first);
map_iter->value_.SetValue(&iter->second);
}
template <typename Derived, typename Key, typename T,
WireFormatLite::FieldType kKeyFieldType,
WireFormatLite::FieldType kValueFieldType>
bool MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::ContainsMapKey(
const MapKey& map_key) const {
const Map<Key, T>& map = impl_.GetMap();
const Key& key = UnwrapMapKey<Key>(map_key);
typename Map<Key, T>::const_iterator iter = map.find(key);
return iter != map.end();
}
template <typename Derived, typename Key, typename T,
WireFormatLite::FieldType kKeyFieldType,
WireFormatLite::FieldType kValueFieldType>
bool MapField<Derived, Key, T, kKeyFieldType,
kValueFieldType>::InsertOrLookupMapValue(const MapKey& map_key,
MapValueRef* val) {
// Always use mutable map because users may change the map value by
// MapValueRef.
Map<Key, T>* map = MutableMap();
const Key& key = UnwrapMapKey<Key>(map_key);
typename Map<Key, T>::iterator iter = map->find(key);
if (map->end() == iter) {
val->SetValue(&((*map)[key]));
return true;
}
// Key is already in the map. Make sure (*map)[key] is not called.
// [] may reorder the map and iterators.
val->SetValue(&(iter->second));
return false;
}
template <typename Derived, typename Key, typename T,
WireFormatLite::FieldType kKeyFieldType,
WireFormatLite::FieldType kValueFieldType>
bool MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::LookupMapValue(
const MapKey& map_key, MapValueConstRef* val) const {
const Map<Key, T>& map = GetMap();
const Key& key = UnwrapMapKey<Key>(map_key);
typename Map<Key, T>::const_iterator iter = map.find(key);
if (map.end() == iter) {
return false;
}
// Key is already in the map. Make sure (*map)[key] is not called.
// [] may reorder the map and iterators.
val->SetValue(&(iter->second));
return true;
}
template <typename Derived, typename Key, typename T,
WireFormatLite::FieldType kKeyFieldType,
WireFormatLite::FieldType kValueFieldType>
bool MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::DeleteMapValue(
const MapKey& map_key) {
const Key& key = UnwrapMapKey<Key>(map_key);
return MutableMap()->erase(key);
}
template <typename Derived, typename Key, typename T,
WireFormatLite::FieldType kKeyFieldType,
WireFormatLite::FieldType kValueFieldType>
void MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::MergeFrom(
const MapFieldBase& other) {
MapFieldBase::SyncMapWithRepeatedField();
const MapField& other_field = static_cast<const MapField&>(other);
other_field.SyncMapWithRepeatedField();
impl_.MergeFrom(other_field.impl_);
MapFieldBase::SetMapDirty();
}
template <typename Derived, typename Key, typename T,
WireFormatLite::FieldType kKeyFieldType,
WireFormatLite::FieldType kValueFieldType>
void MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::Swap(
MapFieldBase* other) {
MapFieldBase::Swap(other);
MapField* other_field = down_cast<MapField*>(other);
impl_.Swap(&other_field->impl_);
}
template <typename Derived, typename Key, typename T,
WireFormatLite::FieldType kKeyFieldType,
WireFormatLite::FieldType kValueFieldType>
void MapField<Derived, Key, T, kKeyFieldType,
kValueFieldType>::UnsafeShallowSwap(MapFieldBase* other) {
InternalSwap(down_cast<MapField*>(other));
}
template <typename Derived, typename Key, typename T,
WireFormatLite::FieldType kKeyFieldType,
WireFormatLite::FieldType kValueFieldType>
void MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::InternalSwap(
MapField* other) {
MapFieldBase::InternalSwap(other);
impl_.InternalSwap(&other->impl_);
}
template <typename Derived, typename Key, typename T,
WireFormatLite::FieldType kKeyFieldType,
WireFormatLite::FieldType kValueFieldType>
void MapField<Derived, Key, T, kKeyFieldType,
kValueFieldType>::SyncRepeatedFieldWithMapNoLock() const {
if (this->MapFieldBase::repeated_field_ == nullptr) {
this->MapFieldBase::repeated_field_ =
Arena::CreateMessage<RepeatedPtrField<Message> >(
this->MapFieldBase::arena_);
}
const Map<Key, T>& map = impl_.GetMap();
RepeatedPtrField<EntryType>* repeated_field =
reinterpret_cast<RepeatedPtrField<EntryType>*>(
this->MapFieldBase::repeated_field_);
repeated_field->Clear();
// The only way we can get at this point is through reflection and the
// only way we can get the reflection object is by having called GetReflection
// on the encompassing field. So that type must have existed and hence we
// know that this MapEntry default_type has also already been constructed.
// So it's safe to just call internal_default_instance().
const Message* default_entry = Derived::internal_default_instance();
for (typename Map<Key, T>::const_iterator it = map.begin(); it != map.end();
++it) {
EntryType* new_entry =
down_cast<EntryType*>(default_entry->New(this->MapFieldBase::arena_));
repeated_field->AddAllocated(new_entry);
(*new_entry->mutable_key()) = it->first;
(*new_entry->mutable_value()) = it->second;
}
}
template <typename Derived, typename Key, typename T,
WireFormatLite::FieldType kKeyFieldType,
WireFormatLite::FieldType kValueFieldType>
void MapField<Derived, Key, T, kKeyFieldType,
kValueFieldType>::SyncMapWithRepeatedFieldNoLock() const {
Map<Key, T>* map = const_cast<MapField*>(this)->impl_.MutableMap();
RepeatedPtrField<EntryType>* repeated_field =
reinterpret_cast<RepeatedPtrField<EntryType>*>(
this->MapFieldBase::repeated_field_);
GOOGLE_CHECK(this->MapFieldBase::repeated_field_ != nullptr);
map->clear();
for (typename RepeatedPtrField<EntryType>::iterator it =
repeated_field->begin();
it != repeated_field->end(); ++it) {
// Cast is needed because Map's api and internal storage is different when
// value is enum. For enum, we cannot cast an int to enum. Thus, we have to
// copy value. For other types, they have same exposed api type and internal
// stored type. We should not introduce value copy for them. We achieve this
// by casting to value for enum while casting to reference for other types.
(*map)[it->key()] = static_cast<CastValueType>(it->value());
}
}
template <typename Derived, typename Key, typename T,
WireFormatLite::FieldType kKeyFieldType,
WireFormatLite::FieldType kValueFieldType>
size_t MapField<Derived, Key, T, kKeyFieldType,
kValueFieldType>::SpaceUsedExcludingSelfNoLock() const {
size_t size = 0;
if (this->MapFieldBase::repeated_field_ != nullptr) {
size += this->MapFieldBase::repeated_field_->SpaceUsedExcludingSelfLong();
}
size += impl_.GetMap().SpaceUsedExcludingSelfLong();
return size;
}
} // namespace internal
} // namespace protobuf
} // namespace google
#endif // GOOGLE_PROTOBUF_MAP_FIELD_INL_H__