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// Copyright 2017 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 QUICHE_SPDY_CORE_ARRAY_OUTPUT_BUFFER_H_
#define QUICHE_SPDY_CORE_ARRAY_OUTPUT_BUFFER_H_
#include <cstddef>
#include "net/third_party/quiche/src/spdy/core/zero_copy_output_buffer.h"
namespace spdy {
class ArrayOutputBuffer : public ZeroCopyOutputBuffer {
public:
// |buffer| is pointed to the output to write to, and |size| is the capacity
// of the output.
ArrayOutputBuffer(char* buffer, int64_t size)
: current_(buffer), begin_(buffer), capacity_(size) {}
~ArrayOutputBuffer() override {}
ArrayOutputBuffer(const ArrayOutputBuffer&) = delete;
ArrayOutputBuffer& operator=(const ArrayOutputBuffer&) = delete;
void Next(char** data, int* size) override;
void AdvanceWritePtr(int64_t count) override;
uint64_t BytesFree() const override;
size_t Size() const { return current_ - begin_; }
char* Begin() const { return begin_; }
// Resets the buffer to its original state.
void Reset() {
capacity_ += Size();
current_ = begin_;
}
private:
char* current_ = nullptr;
char* begin_ = nullptr;
uint64_t capacity_ = 0;
};
} // namespace spdy
#endif // QUICHE_SPDY_CORE_ARRAY_OUTPUT_BUFFER_H_