Squashed 'third_party/protobuf/' content from commit e35e248
Change-Id: I6cbe123d09fe50fdcad0e51466665daeee7433c7
git-subtree-dir: third_party/protobuf
git-subtree-split: e35e24800fb8d694bdeea5fd63dc7d1b14d68723
diff --git a/src/google/protobuf/reflection.h b/src/google/protobuf/reflection.h
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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.
+
+// This header defines the RepeatedFieldRef class template used to access
+// repeated fields with protobuf reflection API.
+#ifndef GOOGLE_PROTOBUF_REFLECTION_H__
+#define GOOGLE_PROTOBUF_REFLECTION_H__
+
+#include <memory>
+#ifndef _SHARED_PTR_H
+#include <google/protobuf/stubs/shared_ptr.h>
+#endif
+
+#include <google/protobuf/message.h>
+#include <google/protobuf/generated_enum_util.h>
+
+namespace google {
+namespace protobuf {
+namespace internal {
+template<typename T, typename Enable = void>
+struct RefTypeTraits;
+} // namespace internal
+
+template<typename T>
+RepeatedFieldRef<T> Reflection::GetRepeatedFieldRef(
+ const Message& message, const FieldDescriptor* field) const {
+ return RepeatedFieldRef<T>(message, field);
+}
+
+template<typename T>
+MutableRepeatedFieldRef<T> Reflection::GetMutableRepeatedFieldRef(
+ Message* message, const FieldDescriptor* field) const {
+ return MutableRepeatedFieldRef<T>(message, field);
+}
+
+// RepeatedFieldRef definition for non-message types.
+template<typename T>
+class RepeatedFieldRef<
+ T, typename internal::enable_if<!internal::is_base_of<Message, T>::value>::type> {
+ typedef typename internal::RefTypeTraits<T>::iterator IteratorType;
+ typedef typename internal::RefTypeTraits<T>::AccessorType AccessorType;
+
+ public:
+ bool empty() const {
+ return accessor_->IsEmpty(data_);
+ }
+ int size() const {
+ return accessor_->Size(data_);
+ }
+ T Get(int index) const {
+ return accessor_->template Get<T>(data_, index);
+ }
+
+ typedef IteratorType iterator;
+ typedef IteratorType const_iterator;
+ iterator begin() const {
+ return iterator(data_, accessor_, true);
+ }
+ iterator end() const {
+ return iterator(data_, accessor_, false);
+ }
+
+ private:
+ friend class Reflection;
+ RepeatedFieldRef(
+ const Message& message,
+ const FieldDescriptor* field) {
+ const Reflection* reflection = message.GetReflection();
+ data_ = reflection->RepeatedFieldData(
+ const_cast<Message*>(&message), field,
+ internal::RefTypeTraits<T>::cpp_type, NULL);
+ accessor_ = reflection->RepeatedFieldAccessor(field);
+ }
+
+ const void* data_;
+ const AccessorType* accessor_;
+};
+
+// MutableRepeatedFieldRef definition for non-message types.
+template<typename T>
+class MutableRepeatedFieldRef<
+ T, typename internal::enable_if<!internal::is_base_of<Message, T>::value>::type> {
+ typedef typename internal::RefTypeTraits<T>::AccessorType AccessorType;
+
+ public:
+ bool empty() const {
+ return accessor_->IsEmpty(data_);
+ }
+ int size() const {
+ return accessor_->Size(data_);
+ }
+ T Get(int index) const {
+ return accessor_->template Get<T>(data_, index);
+ }
+
+ void Set(int index, const T& value) const {
+ accessor_->template Set<T>(data_, index, value);
+ }
+ void Add(const T& value) const {
+ accessor_->template Add<T>(data_, value);
+ }
+ void RemoveLast() const {
+ accessor_->RemoveLast(data_);
+ }
+ void SwapElements(int index1, int index2) const {
+ accessor_->SwapElements(data_, index1, index2);
+ }
+ void Clear() const {
+ accessor_->Clear(data_);
+ }
+
+ void Swap(const MutableRepeatedFieldRef& other) const {
+ accessor_->Swap(data_, other.accessor_, other.data_);
+ }
+
+ template<typename Container>
+ void MergeFrom(const Container& container) const {
+ typedef typename Container::const_iterator Iterator;
+ for (Iterator it = container.begin(); it != container.end(); ++it) {
+ Add(*it);
+ }
+ }
+ template<typename Container>
+ void CopyFrom(const Container& container) const {
+ Clear();
+ MergeFrom(container);
+ }
+
+ private:
+ friend class Reflection;
+ MutableRepeatedFieldRef(
+ Message* message,
+ const FieldDescriptor* field) {
+ const Reflection* reflection = message->GetReflection();
+ data_ = reflection->RepeatedFieldData(
+ message, field, internal::RefTypeTraits<T>::cpp_type, NULL);
+ accessor_ = reflection->RepeatedFieldAccessor(field);
+ }
+
+ void* data_;
+ const AccessorType* accessor_;
+};
+
+// RepeatedFieldRef definition for message types.
+template<typename T>
+class RepeatedFieldRef<
+ T, typename internal::enable_if<internal::is_base_of<Message, T>::value>::type> {
+ typedef typename internal::RefTypeTraits<T>::iterator IteratorType;
+ typedef typename internal::RefTypeTraits<T>::AccessorType AccessorType;
+
+ public:
+ bool empty() const {
+ return accessor_->IsEmpty(data_);
+ }
+ int size() const {
+ return accessor_->Size(data_);
+ }
+ // This method returns a reference to the underlying message object if it
+ // exists. If a message object doesn't exist (e.g., data stored in serialized
+ // form), scratch_space will be filled with the data and a reference to it
+ // will be returned.
+ //
+ // Example:
+ // RepeatedFieldRef<Message> h = ...
+ // unique_ptr<Message> scratch_space(h.NewMessage());
+ // const Message& item = h.Get(index, scratch_space.get());
+ const T& Get(int index, T* scratch_space) const {
+ return *static_cast<const T*>(accessor_->Get(data_, index, scratch_space));
+ }
+ // Create a new message of the same type as the messages stored in this
+ // repeated field. Caller takes ownership of the returned object.
+ T* NewMessage() const {
+ return static_cast<T*>(default_instance_->New());
+ }
+
+ typedef IteratorType iterator;
+ typedef IteratorType const_iterator;
+ iterator begin() const {
+ return iterator(data_, accessor_, true, NewMessage());
+ }
+ iterator end() const {
+ return iterator(data_, accessor_, false, NewMessage());
+ }
+
+ private:
+ friend class Reflection;
+ RepeatedFieldRef(
+ const Message& message,
+ const FieldDescriptor* field) {
+ const Reflection* reflection = message.GetReflection();
+ data_ = reflection->RepeatedFieldData(
+ const_cast<Message*>(&message), field,
+ internal::RefTypeTraits<T>::cpp_type,
+ internal::RefTypeTraits<T>::GetMessageFieldDescriptor());
+ accessor_ = reflection->RepeatedFieldAccessor(field);
+ default_instance_ =
+ reflection->GetMessageFactory()->GetPrototype(field->message_type());
+ }
+
+ const void* data_;
+ const AccessorType* accessor_;
+ const Message* default_instance_;
+};
+
+// MutableRepeatedFieldRef definition for message types.
+template<typename T>
+class MutableRepeatedFieldRef<
+ T, typename internal::enable_if<internal::is_base_of<Message, T>::value>::type> {
+ typedef typename internal::RefTypeTraits<T>::AccessorType AccessorType;
+
+ public:
+ bool empty() const {
+ return accessor_->IsEmpty(data_);
+ }
+ int size() const {
+ return accessor_->Size(data_);
+ }
+ // See comments for RepeatedFieldRef<Message>::Get()
+ const T& Get(int index, T* scratch_space) const {
+ return *static_cast<const T*>(accessor_->Get(data_, index, scratch_space));
+ }
+ // Create a new message of the same type as the messages stored in this
+ // repeated field. Caller takes ownership of the returned object.
+ T* NewMessage() const {
+ return static_cast<T*>(default_instance_->New());
+ }
+
+ void Set(int index, const T& value) const {
+ accessor_->Set(data_, index, &value);
+ }
+ void Add(const T& value) const {
+ accessor_->Add(data_, &value);
+ }
+ void RemoveLast() const {
+ accessor_->RemoveLast(data_);
+ }
+ void SwapElements(int index1, int index2) const {
+ accessor_->SwapElements(data_, index1, index2);
+ }
+ void Clear() const {
+ accessor_->Clear(data_);
+ }
+
+ void Swap(const MutableRepeatedFieldRef& other) const {
+ accessor_->Swap(data_, other.accessor_, other.data_);
+ }
+
+ template<typename Container>
+ void MergeFrom(const Container& container) const {
+ typedef typename Container::const_iterator Iterator;
+ for (Iterator it = container.begin(); it != container.end(); ++it) {
+ Add(*it);
+ }
+ }
+ template<typename Container>
+ void CopyFrom(const Container& container) const {
+ Clear();
+ MergeFrom(container);
+ }
+
+ private:
+ friend class Reflection;
+ MutableRepeatedFieldRef(
+ Message* message,
+ const FieldDescriptor* field) {
+ const Reflection* reflection = message->GetReflection();
+ data_ = reflection->RepeatedFieldData(
+ message, field, internal::RefTypeTraits<T>::cpp_type,
+ internal::RefTypeTraits<T>::GetMessageFieldDescriptor());
+ accessor_ = reflection->RepeatedFieldAccessor(field);
+ default_instance_ =
+ reflection->GetMessageFactory()->GetPrototype(field->message_type());
+ }
+
+ void* data_;
+ const AccessorType* accessor_;
+ const Message* default_instance_;
+};
+
+namespace internal {
+// Interfaces used to implement reflection RepeatedFieldRef API.
+// Reflection::GetRepeatedAccessor() should return a pointer to an singleton
+// object that implements the below interface.
+//
+// This interface passes/returns values using void pointers. The actual type
+// of the value depends on the field's cpp_type. Following is a mapping from
+// cpp_type to the type that should be used in this interface:
+//
+// field->cpp_type() T Actual type of void*
+// CPPTYPE_INT32 int32 int32
+// CPPTYPE_UINT32 uint32 uint32
+// CPPTYPE_INT64 int64 int64
+// CPPTYPE_UINT64 uint64 uint64
+// CPPTYPE_DOUBLE double double
+// CPPTYPE_FLOAT float float
+// CPPTYPE_BOOL bool bool
+// CPPTYPE_ENUM generated enum type int32
+// CPPTYPE_STRING string string
+// CPPTYPE_MESSAGE generated message type google::protobuf::Message
+// or google::protobuf::Message
+//
+// Note that for enums we use int32 in the interface.
+//
+// You can map from T to the actual type using RefTypeTraits:
+// typedef RefTypeTraits<T>::AccessorValueType ActualType;
+class LIBPROTOBUF_EXPORT RepeatedFieldAccessor {
+ public:
+ // Typedefs for clarity.
+ typedef void Field;
+ typedef void Value;
+ typedef void Iterator;
+
+ virtual ~RepeatedFieldAccessor();
+ virtual bool IsEmpty(const Field* data) const = 0;
+ virtual int Size(const Field* data) const = 0;
+ // Depends on the underlying representation of the repeated field, this
+ // method can return a pointer to the underlying object if such an object
+ // exists, or fill the data into scratch_space and return scratch_space.
+ // Callers of this method must ensure scratch_space is a valid pointer
+ // to a mutable object of the correct type.
+ virtual const Value* Get(
+ const Field* data, int index, Value* scratch_space) const = 0;
+
+ virtual void Clear(Field* data) const = 0;
+ virtual void Set(Field* data, int index, const Value* value) const = 0;
+ virtual void Add(Field* data, const Value* value) const = 0;
+ virtual void RemoveLast(Field* data) const = 0;
+ virtual void SwapElements(Field* data, int index1, int index2) const = 0;
+ virtual void Swap(Field* data, const RepeatedFieldAccessor* other_mutator,
+ Field* other_data) const = 0;
+
+ // Create an iterator that points at the begining of the repeated field.
+ virtual Iterator* BeginIterator(const Field* data) const = 0;
+ // Create an iterator that points at the end of the repeated field.
+ virtual Iterator* EndIterator(const Field* data) const = 0;
+ // Make a copy of an iterator and return the new copy.
+ virtual Iterator* CopyIterator(const Field* data,
+ const Iterator* iterator) const = 0;
+ // Move an iterator to point to the next element.
+ virtual Iterator* AdvanceIterator(const Field* data,
+ Iterator* iterator) const = 0;
+ // Compare whether two iterators point to the same element.
+ virtual bool EqualsIterator(const Field* data, const Iterator* a,
+ const Iterator* b) const = 0;
+ // Delete an iterator created by BeginIterator(), EndIterator() and
+ // CopyIterator().
+ virtual void DeleteIterator(const Field* data, Iterator* iterator) const = 0;
+ // Like Get() but for iterators.
+ virtual const Value* GetIteratorValue(const Field* data,
+ const Iterator* iterator,
+ Value* scratch_space) const = 0;
+
+ // Templated methods that make using this interface easier for non-message
+ // types.
+ template<typename T>
+ T Get(const Field* data, int index) const {
+ typedef typename RefTypeTraits<T>::AccessorValueType ActualType;
+ ActualType scratch_space;
+ return static_cast<T>(
+ *reinterpret_cast<const ActualType*>(
+ Get(data, index, static_cast<Value*>(&scratch_space))));
+ }
+
+ template<typename T, typename ValueType>
+ void Set(Field* data, int index, const ValueType& value) const {
+ typedef typename RefTypeTraits<T>::AccessorValueType ActualType;
+ // In this RepeatedFieldAccessor interface we pass/return data using
+ // raw pointers. Type of the data these raw pointers point to should
+ // be ActualType. Here we have a ValueType object and want a ActualType
+ // pointer. We can't cast a ValueType pointer to an ActualType pointer
+ // directly because their type might be different (for enums ValueType
+ // may be a generated enum type while ActualType is int32). To be safe
+ // we make a copy to get a temporary ActualType object and use it.
+ ActualType tmp = static_cast<ActualType>(value);
+ Set(data, index, static_cast<const Value*>(&tmp));
+ }
+
+ template<typename T, typename ValueType>
+ void Add(Field* data, const ValueType& value) const {
+ typedef typename RefTypeTraits<T>::AccessorValueType ActualType;
+ // In this RepeatedFieldAccessor interface we pass/return data using
+ // raw pointers. Type of the data these raw pointers point to should
+ // be ActualType. Here we have a ValueType object and want a ActualType
+ // pointer. We can't cast a ValueType pointer to an ActualType pointer
+ // directly because their type might be different (for enums ValueType
+ // may be a generated enum type while ActualType is int32). To be safe
+ // we make a copy to get a temporary ActualType object and use it.
+ ActualType tmp = static_cast<ActualType>(value);
+ Add(data, static_cast<const Value*>(&tmp));
+ }
+};
+
+// Implement (Mutable)RepeatedFieldRef::iterator
+template<typename T>
+class RepeatedFieldRefIterator
+ : public std::iterator<std::forward_iterator_tag, T> {
+ typedef typename RefTypeTraits<T>::AccessorValueType AccessorValueType;
+ typedef typename RefTypeTraits<T>::IteratorValueType IteratorValueType;
+ typedef typename RefTypeTraits<T>::IteratorPointerType IteratorPointerType;
+
+ public:
+ // Constructor for non-message fields.
+ RepeatedFieldRefIterator(const void* data,
+ const RepeatedFieldAccessor* accessor,
+ bool begin)
+ : data_(data), accessor_(accessor),
+ iterator_(begin ? accessor->BeginIterator(data) :
+ accessor->EndIterator(data)),
+ scratch_space_(new AccessorValueType) {
+ }
+ // Constructor for message fields.
+ RepeatedFieldRefIterator(const void* data,
+ const RepeatedFieldAccessor* accessor,
+ bool begin,
+ AccessorValueType* scratch_space)
+ : data_(data), accessor_(accessor),
+ iterator_(begin ? accessor->BeginIterator(data) :
+ accessor->EndIterator(data)),
+ scratch_space_(scratch_space) {
+ }
+ ~RepeatedFieldRefIterator() {
+ accessor_->DeleteIterator(data_, iterator_);
+ }
+ RepeatedFieldRefIterator operator++(int) {
+ RepeatedFieldRefIterator tmp(*this);
+ iterator_ = accessor_->AdvanceIterator(data_, iterator_);
+ return tmp;
+ }
+ RepeatedFieldRefIterator& operator++() {
+ iterator_ = accessor_->AdvanceIterator(data_, iterator_);
+ return *this;
+ }
+ IteratorValueType operator*() const {
+ return static_cast<IteratorValueType>(
+ *static_cast<const AccessorValueType*>(
+ accessor_->GetIteratorValue(
+ data_, iterator_, scratch_space_.get())));
+ }
+ IteratorPointerType operator->() const {
+ return static_cast<IteratorPointerType>(
+ accessor_->GetIteratorValue(
+ data_, iterator_, scratch_space_.get()));
+ }
+ bool operator!=(const RepeatedFieldRefIterator& other) const {
+ assert(data_ == other.data_);
+ assert(accessor_ == other.accessor_);
+ return !accessor_->EqualsIterator(data_, iterator_, other.iterator_);
+ }
+ bool operator==(const RepeatedFieldRefIterator& other) const {
+ return !this->operator!=(other);
+ }
+
+ RepeatedFieldRefIterator(const RepeatedFieldRefIterator& other)
+ : data_(other.data_), accessor_(other.accessor_),
+ iterator_(accessor_->CopyIterator(data_, other.iterator_)) {
+ }
+ RepeatedFieldRefIterator& operator=(const RepeatedFieldRefIterator& other) {
+ if (this != &other) {
+ accessor_->DeleteIterator(data_, iterator_);
+ data_ = other.data_;
+ accessor_ = other.accessor_;
+ iterator_ = accessor_->CopyIterator(data_, other.iterator_);
+ }
+ return *this;
+ }
+
+ protected:
+ const void* data_;
+ const RepeatedFieldAccessor* accessor_;
+ void* iterator_;
+ google::protobuf::scoped_ptr<AccessorValueType> scratch_space_;
+};
+
+// TypeTraits that maps the type parameter T of RepeatedFieldRef or
+// MutableRepeatedFieldRef to corresponding iterator type,
+// RepeatedFieldAccessor type, etc.
+template<typename T>
+struct PrimitiveTraits {
+ static const bool is_primitive = false;
+};
+#define DEFINE_PRIMITIVE(TYPE, type) \
+ template<> struct PrimitiveTraits<type> { \
+ static const bool is_primitive = true; \
+ static const FieldDescriptor::CppType cpp_type = \
+ FieldDescriptor::CPPTYPE_ ## TYPE; \
+ };
+DEFINE_PRIMITIVE(INT32, int32)
+DEFINE_PRIMITIVE(UINT32, uint32)
+DEFINE_PRIMITIVE(INT64, int64)
+DEFINE_PRIMITIVE(UINT64, uint64)
+DEFINE_PRIMITIVE(FLOAT, float)
+DEFINE_PRIMITIVE(DOUBLE, double)
+DEFINE_PRIMITIVE(BOOL, bool)
+#undef DEFINE_PRIMITIVE
+
+template<typename T>
+struct RefTypeTraits<
+ T, typename internal::enable_if<PrimitiveTraits<T>::is_primitive>::type> {
+ typedef RepeatedFieldRefIterator<T> iterator;
+ typedef RepeatedFieldAccessor AccessorType;
+ typedef T AccessorValueType;
+ typedef T IteratorValueType;
+ typedef T* IteratorPointerType;
+ static const FieldDescriptor::CppType cpp_type =
+ PrimitiveTraits<T>::cpp_type;
+ static const Descriptor* GetMessageFieldDescriptor() {
+ return NULL;
+ }
+};
+
+template<typename T>
+struct RefTypeTraits<
+ T, typename internal::enable_if<is_proto_enum<T>::value>::type> {
+ typedef RepeatedFieldRefIterator<T> iterator;
+ typedef RepeatedFieldAccessor AccessorType;
+ // We use int32 for repeated enums in RepeatedFieldAccessor.
+ typedef int32 AccessorValueType;
+ typedef T IteratorValueType;
+ typedef int32* IteratorPointerType;
+ static const FieldDescriptor::CppType cpp_type =
+ FieldDescriptor::CPPTYPE_ENUM;
+ static const Descriptor* GetMessageFieldDescriptor() {
+ return NULL;
+ }
+};
+
+template<typename T>
+struct RefTypeTraits<
+ T, typename internal::enable_if< ::google::protobuf::internal::is_same<string, T>::value>::type> {
+ typedef RepeatedFieldRefIterator<T> iterator;
+ typedef RepeatedFieldAccessor AccessorType;
+ typedef string AccessorValueType;
+ typedef string IteratorValueType;
+ typedef string* IteratorPointerType;
+ static const FieldDescriptor::CppType cpp_type =
+ FieldDescriptor::CPPTYPE_STRING;
+ static const Descriptor* GetMessageFieldDescriptor() {
+ return NULL;
+ }
+};
+
+template<typename T>
+struct MessageDescriptorGetter {
+ static const Descriptor* get() {
+ return T::default_instance().GetDescriptor();
+ }
+};
+template<>
+struct MessageDescriptorGetter<Message> {
+ static const Descriptor* get() {
+ return NULL;
+ }
+};
+
+template<typename T>
+struct RefTypeTraits<
+ T, typename internal::enable_if<internal::is_base_of<Message, T>::value>::type> {
+ typedef RepeatedFieldRefIterator<T> iterator;
+ typedef RepeatedFieldAccessor AccessorType;
+ typedef Message AccessorValueType;
+ typedef const T& IteratorValueType;
+ typedef const T* IteratorPointerType;
+ static const FieldDescriptor::CppType cpp_type =
+ FieldDescriptor::CPPTYPE_MESSAGE;
+ static const Descriptor* GetMessageFieldDescriptor() {
+ return MessageDescriptorGetter<T>::get();
+ }
+};
+} // namespace internal
+} // namespace protobuf
+} // namespace google
+
+#endif // GOOGLE_PROTOBUF_REFLECTION_H__