376 lines
14 KiB
C++
376 lines
14 KiB
C++
// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef GOOGLE_PROTOBUF_MAP_FIELD_INL_H__
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#define GOOGLE_PROTOBUF_MAP_FIELD_INL_H__
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#include <memory>
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#include <google/protobuf/stubs/casts.h>
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#include <google/protobuf/map.h>
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#include <google/protobuf/map_field.h>
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#include <google/protobuf/map_type_handler.h>
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#ifdef SWIG
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#error "You cannot SWIG proto headers"
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#endif
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namespace google {
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namespace protobuf {
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namespace internal {
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// UnwrapMapKey template
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template <typename T>
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T UnwrapMapKey(const MapKey& map_key);
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template <>
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inline int32 UnwrapMapKey<int32>(const MapKey& map_key) {
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return map_key.GetInt32Value();
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}
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template <>
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inline uint32 UnwrapMapKey<uint32>(const MapKey& map_key) {
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return map_key.GetUInt32Value();
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}
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template <>
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inline int64 UnwrapMapKey<int64>(const MapKey& map_key) {
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return map_key.GetInt64Value();
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}
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template <>
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inline uint64 UnwrapMapKey<uint64>(const MapKey& map_key) {
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return map_key.GetUInt64Value();
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}
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template <>
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inline bool UnwrapMapKey<bool>(const MapKey& map_key) {
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return map_key.GetBoolValue();
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}
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template <>
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inline std::string UnwrapMapKey<std::string>(const MapKey& map_key) {
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return map_key.GetStringValue();
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}
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// SetMapKey template
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template <typename T>
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inline void SetMapKey(MapKey* map_key, const T& value);
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template <>
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inline void SetMapKey<int32>(MapKey* map_key, const int32& value) {
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map_key->SetInt32Value(value);
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}
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template <>
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inline void SetMapKey<uint32>(MapKey* map_key, const uint32& value) {
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map_key->SetUInt32Value(value);
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}
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template <>
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inline void SetMapKey<int64>(MapKey* map_key, const int64& value) {
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map_key->SetInt64Value(value);
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}
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template <>
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inline void SetMapKey<uint64>(MapKey* map_key, const uint64& value) {
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map_key->SetUInt64Value(value);
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}
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template <>
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inline void SetMapKey<bool>(MapKey* map_key, const bool& value) {
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map_key->SetBoolValue(value);
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}
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template <>
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inline void SetMapKey<std::string>(MapKey* map_key, const std::string& value) {
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map_key->SetStringValue(value);
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}
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// ------------------------TypeDefinedMapFieldBase---------------
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template <typename Key, typename T>
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typename Map<Key, T>::const_iterator&
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TypeDefinedMapFieldBase<Key, T>::InternalGetIterator(
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const MapIterator* map_iter) const {
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return *reinterpret_cast<typename Map<Key, T>::const_iterator*>(
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map_iter->iter_);
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}
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template <typename Key, typename T>
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void TypeDefinedMapFieldBase<Key, T>::MapBegin(MapIterator* map_iter) const {
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InternalGetIterator(map_iter) = GetMap().begin();
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SetMapIteratorValue(map_iter);
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}
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template <typename Key, typename T>
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void TypeDefinedMapFieldBase<Key, T>::MapEnd(MapIterator* map_iter) const {
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InternalGetIterator(map_iter) = GetMap().end();
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}
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template <typename Key, typename T>
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bool TypeDefinedMapFieldBase<Key, T>::EqualIterator(
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const MapIterator& a, const MapIterator& b) const {
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return InternalGetIterator(&a) == InternalGetIterator(&b);
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}
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template <typename Key, typename T>
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void TypeDefinedMapFieldBase<Key, T>::IncreaseIterator(
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MapIterator* map_iter) const {
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++InternalGetIterator(map_iter);
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SetMapIteratorValue(map_iter);
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}
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template <typename Key, typename T>
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void TypeDefinedMapFieldBase<Key, T>::InitializeIterator(
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MapIterator* map_iter) const {
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map_iter->iter_ = new typename Map<Key, T>::const_iterator;
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GOOGLE_CHECK(map_iter->iter_ != NULL);
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}
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template <typename Key, typename T>
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void TypeDefinedMapFieldBase<Key, T>::DeleteIterator(
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MapIterator* map_iter) const {
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delete reinterpret_cast<typename Map<Key, T>::const_iterator*>(
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map_iter->iter_);
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}
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template <typename Key, typename T>
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void TypeDefinedMapFieldBase<Key, T>::CopyIterator(
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MapIterator* this_iter, const MapIterator& that_iter) const {
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InternalGetIterator(this_iter) = InternalGetIterator(&that_iter);
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this_iter->key_.SetType(that_iter.key_.type());
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// MapValueRef::type() fails when containing data is null. However, if
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// this_iter points to MapEnd, data can be null.
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this_iter->value_.SetType(
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static_cast<FieldDescriptor::CppType>(that_iter.value_.type_));
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SetMapIteratorValue(this_iter);
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}
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// ----------------------------------------------------------------------
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template <typename Derived, typename Key, typename T,
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WireFormatLite::FieldType kKeyFieldType,
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WireFormatLite::FieldType kValueFieldType>
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int MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::size() const {
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MapFieldBase::SyncMapWithRepeatedField();
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return static_cast<int>(impl_.GetMap().size());
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}
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template <typename Derived, typename Key, typename T,
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WireFormatLite::FieldType kKeyFieldType,
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WireFormatLite::FieldType kValueFieldType>
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void MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::Clear() {
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if (this->MapFieldBase::repeated_field_ != nullptr) {
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RepeatedPtrField<EntryType>* repeated_field =
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reinterpret_cast<RepeatedPtrField<EntryType>*>(
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this->MapFieldBase::repeated_field_);
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repeated_field->Clear();
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}
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impl_.MutableMap()->clear();
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// Data in map and repeated field are both empty, but we can't set status
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// CLEAN. Because clear is a generated API, we cannot invalidate previous
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// reference to map.
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MapFieldBase::SetMapDirty();
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}
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template <typename Derived, typename Key, typename T,
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WireFormatLite::FieldType kKeyFieldType,
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WireFormatLite::FieldType kValueFieldType>
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void MapField<Derived, Key, T, kKeyFieldType,
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kValueFieldType>::SetMapIteratorValue(MapIterator* map_iter)
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const {
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const Map<Key, T>& map = impl_.GetMap();
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typename Map<Key, T>::const_iterator iter =
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TypeDefinedMapFieldBase<Key, T>::InternalGetIterator(map_iter);
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if (iter == map.end()) return;
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SetMapKey(&map_iter->key_, iter->first);
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map_iter->value_.SetValue(&iter->second);
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}
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template <typename Derived, typename Key, typename T,
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WireFormatLite::FieldType kKeyFieldType,
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WireFormatLite::FieldType kValueFieldType>
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bool MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::ContainsMapKey(
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const MapKey& map_key) const {
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const Map<Key, T>& map = impl_.GetMap();
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const Key& key = UnwrapMapKey<Key>(map_key);
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typename Map<Key, T>::const_iterator iter = map.find(key);
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return iter != map.end();
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}
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template <typename Derived, typename Key, typename T,
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WireFormatLite::FieldType kKeyFieldType,
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WireFormatLite::FieldType kValueFieldType>
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bool MapField<Derived, Key, T, kKeyFieldType,
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kValueFieldType>::InsertOrLookupMapValue(const MapKey& map_key,
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MapValueRef* val) {
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// Always use mutable map because users may change the map value by
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// MapValueRef.
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Map<Key, T>* map = MutableMap();
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const Key& key = UnwrapMapKey<Key>(map_key);
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typename Map<Key, T>::iterator iter = map->find(key);
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if (map->end() == iter) {
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val->SetValue(&((*map)[key]));
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return true;
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}
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// Key is already in the map. Make sure (*map)[key] is not called.
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// [] may reorder the map and iterators.
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val->SetValue(&(iter->second));
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return false;
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}
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template <typename Derived, typename Key, typename T,
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WireFormatLite::FieldType kKeyFieldType,
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WireFormatLite::FieldType kValueFieldType>
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bool MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::LookupMapValue(
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const MapKey& map_key, MapValueConstRef* val) const {
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const Map<Key, T>& map = GetMap();
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const Key& key = UnwrapMapKey<Key>(map_key);
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typename Map<Key, T>::const_iterator iter = map.find(key);
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if (map.end() == iter) {
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return false;
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}
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// Key is already in the map. Make sure (*map)[key] is not called.
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// [] may reorder the map and iterators.
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val->SetValue(&(iter->second));
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return true;
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}
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template <typename Derived, typename Key, typename T,
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WireFormatLite::FieldType kKeyFieldType,
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WireFormatLite::FieldType kValueFieldType>
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bool MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::DeleteMapValue(
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const MapKey& map_key) {
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const Key& key = UnwrapMapKey<Key>(map_key);
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return MutableMap()->erase(key);
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}
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template <typename Derived, typename Key, typename T,
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WireFormatLite::FieldType kKeyFieldType,
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WireFormatLite::FieldType kValueFieldType>
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void MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::MergeFrom(
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const MapFieldBase& other) {
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MapFieldBase::SyncMapWithRepeatedField();
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const MapField& other_field = static_cast<const MapField&>(other);
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other_field.SyncMapWithRepeatedField();
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impl_.MergeFrom(other_field.impl_);
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MapFieldBase::SetMapDirty();
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}
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template <typename Derived, typename Key, typename T,
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WireFormatLite::FieldType kKeyFieldType,
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WireFormatLite::FieldType kValueFieldType>
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void MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::Swap(
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MapFieldBase* other) {
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MapFieldBase::Swap(other);
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MapField* other_field = down_cast<MapField*>(other);
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impl_.Swap(&other_field->impl_);
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}
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template <typename Derived, typename Key, typename T,
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WireFormatLite::FieldType kKeyFieldType,
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WireFormatLite::FieldType kValueFieldType>
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void MapField<Derived, Key, T, kKeyFieldType,
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kValueFieldType>::UnsafeShallowSwap(MapFieldBase* other) {
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InternalSwap(down_cast<MapField*>(other));
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}
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template <typename Derived, typename Key, typename T,
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WireFormatLite::FieldType kKeyFieldType,
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WireFormatLite::FieldType kValueFieldType>
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void MapField<Derived, Key, T, kKeyFieldType, kValueFieldType>::InternalSwap(
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MapField* other) {
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MapFieldBase::InternalSwap(other);
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impl_.InternalSwap(&other->impl_);
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}
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template <typename Derived, typename Key, typename T,
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WireFormatLite::FieldType kKeyFieldType,
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WireFormatLite::FieldType kValueFieldType>
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void MapField<Derived, Key, T, kKeyFieldType,
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kValueFieldType>::SyncRepeatedFieldWithMapNoLock() const {
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if (this->MapFieldBase::repeated_field_ == NULL) {
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this->MapFieldBase::repeated_field_ =
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Arena::CreateMessage<RepeatedPtrField<Message> >(
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this->MapFieldBase::arena_);
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}
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const Map<Key, T>& map = impl_.GetMap();
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RepeatedPtrField<EntryType>* repeated_field =
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reinterpret_cast<RepeatedPtrField<EntryType>*>(
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this->MapFieldBase::repeated_field_);
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repeated_field->Clear();
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// The only way we can get at this point is through reflection and the
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// only way we can get the reflection object is by having called GetReflection
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// on the encompassing field. So that type must have existed and hence we
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// know that this MapEntry default_type has also already been constructed.
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// So it's safe to just call internal_default_instance().
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const Message* default_entry = Derived::internal_default_instance();
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for (typename Map<Key, T>::const_iterator it = map.begin(); it != map.end();
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++it) {
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EntryType* new_entry =
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down_cast<EntryType*>(default_entry->New(this->MapFieldBase::arena_));
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repeated_field->AddAllocated(new_entry);
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(*new_entry->mutable_key()) = it->first;
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(*new_entry->mutable_value()) = it->second;
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}
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}
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template <typename Derived, typename Key, typename T,
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WireFormatLite::FieldType kKeyFieldType,
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WireFormatLite::FieldType kValueFieldType>
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void MapField<Derived, Key, T, kKeyFieldType,
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kValueFieldType>::SyncMapWithRepeatedFieldNoLock() const {
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Map<Key, T>* map = const_cast<MapField*>(this)->impl_.MutableMap();
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RepeatedPtrField<EntryType>* repeated_field =
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reinterpret_cast<RepeatedPtrField<EntryType>*>(
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this->MapFieldBase::repeated_field_);
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GOOGLE_CHECK(this->MapFieldBase::repeated_field_ != NULL);
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map->clear();
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for (typename RepeatedPtrField<EntryType>::iterator it =
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repeated_field->begin();
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it != repeated_field->end(); ++it) {
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// Cast is needed because Map's api and internal storage is different when
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// value is enum. For enum, we cannot cast an int to enum. Thus, we have to
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// copy value. For other types, they have same exposed api type and internal
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// stored type. We should not introduce value copy for them. We achieve this
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// by casting to value for enum while casting to reference for other types.
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(*map)[it->key()] = static_cast<CastValueType>(it->value());
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}
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}
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template <typename Derived, typename Key, typename T,
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WireFormatLite::FieldType kKeyFieldType,
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WireFormatLite::FieldType kValueFieldType>
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size_t MapField<Derived, Key, T, kKeyFieldType,
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kValueFieldType>::SpaceUsedExcludingSelfNoLock() const {
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size_t size = 0;
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if (this->MapFieldBase::repeated_field_ != NULL) {
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size += this->MapFieldBase::repeated_field_->SpaceUsedExcludingSelfLong();
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}
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size += impl_.GetMap().SpaceUsedExcludingSelfLong();
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return size;
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}
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} // namespace internal
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} // namespace protobuf
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} // namespace google
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#endif // GOOGLE_PROTOBUF_MAP_FIELD_INL_H__
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