62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
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/*
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* Copyright 2018 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef RTC_BASE_MEMORY_STREAM_H_
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#define RTC_BASE_MEMORY_STREAM_H_
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#include <stddef.h>
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#include "rtc_base/stream.h"
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namespace rtc {
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// MemoryStream dynamically resizes to accomodate written data.
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class MemoryStream final : public StreamInterface {
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public:
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MemoryStream();
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~MemoryStream() override;
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StreamState GetState() const override;
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StreamResult Read(void* buffer,
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size_t bytes,
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size_t* bytes_read,
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int* error) override;
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StreamResult Write(const void* buffer,
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size_t bytes,
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size_t* bytes_written,
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int* error) override;
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void Close() override;
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bool GetSize(size_t* size) const;
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bool ReserveSize(size_t size);
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bool SetPosition(size_t position);
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bool GetPosition(size_t* position) const;
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void Rewind();
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char* GetBuffer() { return buffer_; }
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const char* GetBuffer() const { return buffer_; }
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void SetData(const void* data, size_t length);
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private:
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StreamResult DoReserve(size_t size, int* error);
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// Invariant: 0 <= seek_position <= data_length_ <= buffer_length_
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char* buffer_ = nullptr;
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size_t buffer_length_ = 0;
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size_t data_length_ = 0;
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size_t seek_position_ = 0;
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};
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} // namespace rtc
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#endif // RTC_BASE_MEMORY_STREAM_H_
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