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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MOJO_PUBLIC_CPP_BINDINGS_ARRAY_H_
#define MOJO_PUBLIC_CPP_BINDINGS_ARRAY_H_
#include <string.h>
#include <algorithm>
#include <string>
#include <vector>
#include "mojo/public/cpp/bindings/lib/array_internal.h"
#include "mojo/public/cpp/bindings/type_converter.h"
namespace mojo {
// Provides read-only access to array data.
template <typename T>
class Array {
public:
typedef internal::ArrayTraits<T, internal::TypeTraits<T>::kIsObject> Traits_;
typedef typename Traits_::DataType Data;
typedef typename Traits_::ConstRef ConstRef;
Array() : data_(NULL) {
}
template <typename U>
Array(const U& u, Buffer* buf = Buffer::current()) {
*this = TypeConverter<Array<T>,U>::ConvertFrom(u, buf);
}
template <typename U>
Array& operator=(const U& u) {
*this = TypeConverter<Array<T>,U>::ConvertFrom(u, Buffer::current());
return *this;
}
template <typename U>
operator U() const {
return To<U>();
}
template <typename U>
U To() const {
return TypeConverter<Array<T>,U>::ConvertTo(*this);
}
bool is_null() const { return !data_; }
size_t size() const { return data_->size(); }
ConstRef at(size_t offset) const {
return Traits_::ToConstRef(data_->at(offset));
}
ConstRef operator[](size_t offset) const { return at(offset); }
// Provides a way to initialize an array element-by-element.
class Builder {
public:
typedef typename Array<T>::Data Data;
typedef typename Array<T>::Traits_ Traits_;
typedef typename Traits_::Ref Ref;
explicit Builder(size_t num_elements, Buffer* buf = mojo::Buffer::current())
: data_(Data::New(num_elements, buf)) {
}
size_t size() const { return data_->size(); }
Ref at(size_t offset) {
return Traits_::ToRef(data_->at(offset));
}
Ref operator[](size_t offset) { return at(offset); }
Array<T> Finish() {
Data* data = NULL;
std::swap(data, data_);
return internal::Wrap(data);
}
private:
Data* data_;
MOJO_DISALLOW_COPY_AND_ASSIGN(Builder);
};
protected:
friend class internal::WrapperHelper<Array<T> >;
struct Wrap {};
Array(Wrap, const Data* data) : data_(data) {}
const Data* data_;
};
// UTF-8 encoded
typedef Array<char> String;
template <>
class TypeConverter<String, std::string> {
public:
static String ConvertFrom(const std::string& input, Buffer* buf);
static std::string ConvertTo(const String& input);
};
template <size_t N>
class TypeConverter<String, char[N]> {
public:
static String ConvertFrom(const char input[N], Buffer* buf) {
String::Builder result(N - 1, buf);
memcpy(&result[0], input, N - 1);
return result.Finish();
}
};
// Appease MSVC.
template <size_t N>
class TypeConverter<String, const char[N]> {
public:
static String ConvertFrom(const char input[N], Buffer* buf) {
return TypeConverter<String, char[N]>::ConvertFrom(input, buf);
}
};
template <>
class TypeConverter<String, const char*> {
public:
static String ConvertFrom(const char* input, Buffer* buf);
// NOTE: |ConvertTo| explicitly not implemented since String is not null
// terminated (and may have embedded null bytes).
};
template <typename T, typename E>
class TypeConverter<Array<T>, std::vector<E> > {
public:
static Array<T> ConvertFrom(const std::vector<E>& input, Buffer* buf) {
typename Array<T>::Builder result(input.size(), buf);
for (size_t i = 0; i < input.size(); ++i)
result[i] = TypeConverter<T, E>::ConvertFrom(input[i], buf);
return result.Finish();
}
static std::vector<E> ConvertTo(const Array<T>& input) {
std::vector<E> result;
if (!input.is_null()) {
result.resize(input.size());
for (size_t i = 0; i < input.size(); ++i)
result[i] = TypeConverter<T, E>::ConvertTo(input[i]);
}
return result;
}
};
} // namespace mojo
#endif // MOJO_PUBLIC_CPP_BINDINGS_ARRAY_H_
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