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Side by Side Diff: mojo/public/bindings/array.h

Issue 218613010: Mojo: Move mojo/public/bindings/*.h to mojo/public/cpp/bindings/*.h. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 6 years, 8 months ago
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1 // Copyright 2013 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.
4
5 #ifndef MOJO_PUBLIC_BINDINGS_ARRAY_H_
6 #define MOJO_PUBLIC_BINDINGS_ARRAY_H_
7
8 #include <string.h>
9
10 #include <algorithm>
11 #include <string>
12 #include <vector>
13
14 #include "mojo/public/bindings/lib/array_internal.h"
15 #include "mojo/public/bindings/type_converter.h"
16
17 namespace mojo {
18
19 // Provides read-only access to array data.
20 template <typename T>
21 class Array {
22 public:
23 typedef internal::ArrayTraits<T, internal::TypeTraits<T>::kIsObject> Traits_;
24 typedef typename Traits_::DataType Data;
25 typedef typename Traits_::ConstRef ConstRef;
26
27 Array() : data_(NULL) {
28 }
29
30 template <typename U>
31 Array(const U& u, Buffer* buf = Buffer::current()) {
32 *this = TypeConverter<Array<T>,U>::ConvertFrom(u, buf);
33 }
34
35 template <typename U>
36 Array& operator=(const U& u) {
37 *this = TypeConverter<Array<T>,U>::ConvertFrom(u, Buffer::current());
38 return *this;
39 }
40
41 template <typename U>
42 operator U() const {
43 return To<U>();
44 }
45
46 template <typename U>
47 U To() const {
48 return TypeConverter<Array<T>,U>::ConvertTo(*this);
49 }
50
51 bool is_null() const { return !data_; }
52
53 size_t size() const { return data_->size(); }
54
55 ConstRef at(size_t offset) const {
56 return Traits_::ToConstRef(data_->at(offset));
57 }
58 ConstRef operator[](size_t offset) const { return at(offset); }
59
60 // Provides a way to initialize an array element-by-element.
61 class Builder {
62 public:
63 typedef typename Array<T>::Data Data;
64 typedef typename Array<T>::Traits_ Traits_;
65 typedef typename Traits_::Ref Ref;
66
67 explicit Builder(size_t num_elements, Buffer* buf = mojo::Buffer::current())
68 : data_(Data::New(num_elements, buf)) {
69 }
70
71 size_t size() const { return data_->size(); }
72
73 Ref at(size_t offset) {
74 return Traits_::ToRef(data_->at(offset));
75 }
76 Ref operator[](size_t offset) { return at(offset); }
77
78 Array<T> Finish() {
79 Data* data = NULL;
80 std::swap(data, data_);
81 return internal::Wrap(data);
82 }
83
84 private:
85 Data* data_;
86 MOJO_DISALLOW_COPY_AND_ASSIGN(Builder);
87 };
88
89 protected:
90 friend class internal::WrapperHelper<Array<T> >;
91
92 struct Wrap {};
93 Array(Wrap, const Data* data) : data_(data) {}
94
95 const Data* data_;
96 };
97
98 // UTF-8 encoded
99 typedef Array<char> String;
100
101 template <>
102 class TypeConverter<String, std::string> {
103 public:
104 static String ConvertFrom(const std::string& input, Buffer* buf);
105 static std::string ConvertTo(const String& input);
106 };
107
108 template <size_t N>
109 class TypeConverter<String, char[N]> {
110 public:
111 static String ConvertFrom(const char input[N], Buffer* buf) {
112 String::Builder result(N - 1, buf);
113 memcpy(&result[0], input, N - 1);
114 return result.Finish();
115 }
116 };
117
118 // Appease MSVC.
119 template <size_t N>
120 class TypeConverter<String, const char[N]> {
121 public:
122 static String ConvertFrom(const char input[N], Buffer* buf) {
123 return TypeConverter<String, char[N]>::ConvertFrom(input, buf);
124 }
125 };
126
127 template <>
128 class TypeConverter<String, const char*> {
129 public:
130 static String ConvertFrom(const char* input, Buffer* buf);
131 // NOTE: |ConvertTo| explicitly not implemented since String is not null
132 // terminated (and may have embedded null bytes).
133 };
134
135 template <typename T, typename E>
136 class TypeConverter<Array<T>, std::vector<E> > {
137 public:
138 static Array<T> ConvertFrom(const std::vector<E>& input, Buffer* buf) {
139 typename Array<T>::Builder result(input.size(), buf);
140 for (size_t i = 0; i < input.size(); ++i)
141 result[i] = TypeConverter<T, E>::ConvertFrom(input[i], buf);
142 return result.Finish();
143 }
144 static std::vector<E> ConvertTo(const Array<T>& input) {
145 std::vector<E> result;
146 if (!input.is_null()) {
147 result.resize(input.size());
148 for (size_t i = 0; i < input.size(); ++i)
149 result[i] = TypeConverter<T, E>::ConvertTo(input[i]);
150 }
151 return result;
152 }
153 };
154
155 } // namespace mojo
156
157 #endif // MOJO_PUBLIC_BINDINGS_ARRAY_H_
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