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_CPP_BINDINGS_ARRAY_H_ 6 #define MOJO_PUBLIC_CPP_BINDINGS_ARRAY_H_ 7 8 #include <string.h> 9 10 #include <algorithm> 11 #include <string> 12 #include <vector> 13 14 #include "mojo/public/cpp/bindings/lib/array_internal.h" 15 #include "mojo/public/cpp/bindings/lib/template_util.h" 16 #include "mojo/public/cpp/bindings/type_converter.h" 17 18 namespace mojo { 19 20 // Provides read-only access to array data. 21 template <typename T> 22 class Array { 23 MOJO_MOVE_ONLY_TYPE_FOR_CPP_03(Array, RValue) 24 public: 25 typedef internal::ArrayTraits<T, internal::IsMoveOnlyType<T>::value> 26 Traits; 27 typedef typename Traits::ConstRefType ConstRefType; 28 typedef typename Traits::RefType RefType; 29 typedef typename Traits::StorageType StorageType; 30 typedef typename Traits::ForwardType ForwardType; 31 32 typedef internal::Array_Data<typename internal::WrapperTraits<T>::DataType> 33 Data_; 34 Array()35 Array() : is_null_(true) {} Array(size_t size)36 explicit Array(size_t size) : vec_(size), is_null_(false) { 37 Traits::Initialize(&vec_); 38 } ~Array()39 ~Array() { Traits::Finalize(&vec_); } 40 Array(RValue other)41 Array(RValue other) : is_null_(true) { Take(other.object); } 42 Array& operator=(RValue other) { 43 Take(other.object); 44 return *this; 45 } 46 New(size_t size)47 static Array New(size_t size) { 48 return Array(size).Pass(); 49 } 50 51 template <typename U> From(const U & other)52 static Array From(const U& other) { 53 return TypeConverter<Array, U>::ConvertFrom(other); 54 } 55 56 template <typename U> To()57 U To() const { 58 return TypeConverter<Array, U>::ConvertTo(*this); 59 } 60 reset()61 void reset() { 62 if (!vec_.empty()) { 63 Traits::Finalize(&vec_); 64 vec_.clear(); 65 } 66 is_null_ = true; 67 } 68 is_null()69 bool is_null() const { return is_null_; } 70 size()71 size_t size() const { return vec_.size(); } 72 at(size_t offset)73 ConstRefType at(size_t offset) const { return Traits::at(&vec_, offset); } 74 ConstRefType operator[](size_t offset) const { return at(offset); } 75 at(size_t offset)76 RefType at(size_t offset) { return Traits::at(&vec_, offset); } 77 RefType operator[](size_t offset) { return at(offset); } 78 push_back(ForwardType value)79 void push_back(ForwardType value) { 80 is_null_ = false; 81 Traits::PushBack(&vec_, value); 82 } 83 resize(size_t size)84 void resize(size_t size) { 85 is_null_ = false; 86 Traits::Resize(&vec_, size); 87 } 88 storage()89 const std::vector<StorageType>& storage() const { 90 return vec_; 91 } 92 operator const std::vector<StorageType>&() const { 93 return vec_; 94 } 95 Swap(Array * other)96 void Swap(Array* other) { 97 std::swap(is_null_, other->is_null_); 98 vec_.swap(other->vec_); 99 } Swap(std::vector<StorageType> * other)100 void Swap(std::vector<StorageType>* other) { 101 is_null_ = false; 102 vec_.swap(*other); 103 } 104 105 private: 106 typedef std::vector<StorageType> Array::*Testable; 107 108 public: Testable()109 operator Testable() const { return is_null_ ? 0 : &Array::vec_; } 110 111 private: Take(Array * other)112 void Take(Array* other) { 113 reset(); 114 Swap(other); 115 } 116 117 std::vector<StorageType> vec_; 118 bool is_null_; 119 }; 120 121 template <typename T, typename E> 122 class TypeConverter<Array<T>, std::vector<E> > { 123 public: ConvertFrom(const std::vector<E> & input)124 static Array<T> ConvertFrom(const std::vector<E>& input) { 125 Array<T> result(input.size()); 126 for (size_t i = 0; i < input.size(); ++i) 127 result[i] = TypeConverter<T, E>::ConvertFrom(input[i]); 128 return result.Pass(); 129 } ConvertTo(const Array<T> & input)130 static std::vector<E> ConvertTo(const Array<T>& input) { 131 std::vector<E> result; 132 if (!input.is_null()) { 133 result.resize(input.size()); 134 for (size_t i = 0; i < input.size(); ++i) 135 result[i] = TypeConverter<T, E>::ConvertTo(input[i]); 136 } 137 return result; 138 } 139 }; 140 141 } // namespace mojo 142 143 #endif // MOJO_PUBLIC_CPP_BINDINGS_ARRAY_H_ 144