1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef MOJO_PUBLIC_CPP_BINDINGS_LIB_ARRAY_SERIALIZATION_H_
6 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_ARRAY_SERIALIZATION_H_
8 #include <string.h> // For |memcpy()|.
12 #include "mojo/public/cpp/bindings/lib/array_internal.h"
13 #include "mojo/public/cpp/bindings/lib/string_serialization.h"
18 inline size_t GetSerializedSize_(const Array<E>& input);
20 template <typename E, typename F>
21 inline void Serialize_(Array<E> input, internal::Buffer* buf,
22 internal::Array_Data<F>** output);
23 template <typename E, typename F>
24 inline void Deserialize_(internal::Array_Data<F>* data, Array<E>* output);
28 template <typename E, typename F, bool move_only = IsMoveOnlyType<E>::value>
29 struct ArraySerializer;
31 template <typename E, typename F> struct ArraySerializer<E, F, false> {
32 MOJO_COMPILE_ASSERT(sizeof(E) == sizeof(F), wrong_array_serializer);
33 static size_t GetSerializedSize(const Array<E>& input) {
34 return sizeof(Array_Data<F>) + Align(input.size() * sizeof(E));
36 static void SerializeElements(
37 Array<E> input, Buffer* buf, Array_Data<F>* output) {
38 memcpy(output->storage(), &input.storage()[0], input.size() * sizeof(E));
40 static void DeserializeElements(
41 Array_Data<F>* input, Array<E>* output) {
42 std::vector<E> result(input->size());
43 memcpy(&result[0], input->storage(), input->size() * sizeof(E));
44 output->Swap(&result);
48 template <> struct ArraySerializer<bool, bool, false> {
49 static size_t GetSerializedSize(const Array<bool>& input) {
50 return sizeof(Array_Data<bool>) + Align((input.size() + 7) / 8);
52 static void SerializeElements(
53 Array<bool> input, Buffer* buf, Array_Data<bool>* output) {
54 // TODO(darin): Can this be a memcpy somehow instead of a bit-by-bit copy?
55 for (size_t i = 0; i < input.size(); ++i)
56 output->at(i) = input[i];
58 static void DeserializeElements(
59 Array_Data<bool>* input, Array<bool>* output) {
60 Array<bool> result(input->size());
61 // TODO(darin): Can this be a memcpy somehow instead of a bit-by-bit copy?
62 for (size_t i = 0; i < input->size(); ++i)
63 result.at(i) = input->at(i);
64 output->Swap(&result);
68 template <typename H> struct ArraySerializer<ScopedHandleBase<H>, H, true> {
69 static size_t GetSerializedSize(const Array<ScopedHandleBase<H> >& input) {
70 return sizeof(Array_Data<H>) + Align(input.size() * sizeof(H));
72 static void SerializeElements(
73 Array<ScopedHandleBase<H> > input,
75 Array_Data<H>* output) {
76 for (size_t i = 0; i < input.size(); ++i)
77 output->at(i) = input[i].release(); // Transfer ownership of the handle.
79 static void DeserializeElements(
80 Array_Data<H>* input, Array<ScopedHandleBase<H> >* output) {
81 Array<ScopedHandleBase<H> > result(input->size());
82 for (size_t i = 0; i < input->size(); ++i)
83 result.at(i) = MakeScopedHandle(FetchAndReset(&input->at(i)));
84 output->Swap(&result);
88 template <typename S> struct ArraySerializer<S, typename S::Data_*, true> {
89 static size_t GetSerializedSize(const Array<S>& input) {
90 size_t size = sizeof(Array_Data<typename S::Data_*>) +
91 input.size() * sizeof(internal::StructPointer<typename S::Data_>);
92 for (size_t i = 0; i < input.size(); ++i)
93 size += GetSerializedSize_(input[i]);
96 static void SerializeElements(
99 Array_Data<typename S::Data_*>* output) {
100 for (size_t i = 0; i < input.size(); ++i) {
101 typename S::Data_* element;
102 Serialize_(input[i].Pass(), buf, &element);
103 output->at(i) = element;
106 static void DeserializeElements(
107 Array_Data<typename S::Data_*>* input, Array<S>* output) {
108 Array<S> result(input->size());
109 for (size_t i = 0; i < input->size(); ++i) {
111 Deserialize_(input->at(i), &element);
112 result[i] = element.Pass();
114 output->Swap(&result);
118 template <> struct ArraySerializer<String, String_Data*, false> {
119 static size_t GetSerializedSize(const Array<String>& input) {
120 size_t size = sizeof(Array_Data<String_Data*>) +
121 input.size() * sizeof(internal::StringPointer);
122 for (size_t i = 0; i < input.size(); ++i)
123 size += GetSerializedSize_(input[i]);
126 static void SerializeElements(
129 Array_Data<String_Data*>* output) {
130 for (size_t i = 0; i < input.size(); ++i) {
131 String_Data* element;
132 Serialize_(input[i], buf, &element);
133 output->at(i) = element;
136 static void DeserializeElements(
137 Array_Data<String_Data*>* input, Array<String>* output) {
138 Array<String> result(input->size());
139 for (size_t i = 0; i < input->size(); ++i)
140 Deserialize_(input->at(i), &result[i]);
141 output->Swap(&result);
145 } // namespace internal
147 template <typename E>
148 inline size_t GetSerializedSize_(const Array<E>& input) {
151 typedef typename internal::WrapperTraits<E>::DataType F;
152 return internal::ArraySerializer<E, F>::GetSerializedSize(input);
155 template <typename E, typename F>
156 inline void Serialize_(Array<E> input, internal::Buffer* buf,
157 internal::Array_Data<F>** output) {
159 internal::Array_Data<F>* result =
160 internal::Array_Data<F>::New(input.size(), buf);
161 internal::ArraySerializer<E, F>::SerializeElements(
162 internal::Forward(input), buf, result);
169 template <typename E, typename F>
170 inline void Deserialize_(internal::Array_Data<F>* input,
173 internal::ArraySerializer<E, F>::DeserializeElements(input, output);
181 #endif // MOJO_PUBLIC_CPP_BINDINGS_LIB_ARRAY_SERIALIZATION_H_