blob: 936f71b34c010b2263e478029329b1ecfd270d70 [file] [log] [blame]
* Copyright 2018 The WebRTC Project Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
#include "rtc_base/stream.h"
namespace rtc {
// MemoryStream dynamically resizes to accomodate written data.
class MemoryStream final : public StreamInterface {
explicit MemoryStream(const char* data); // Calls SetData(data, strlen(data))
MemoryStream(const void* data, size_t length); // Calls SetData(data, length)
~MemoryStream() override;
StreamState GetState() const override;
StreamResult Read(void* buffer,
size_t bytes,
size_t* bytes_read,
int* error) override;
StreamResult Write(const void* buffer,
size_t bytes,
size_t* bytes_written,
int* error) override;
void Close() override;
bool SetPosition(size_t position) override;
bool GetPosition(size_t* position) const override;
bool GetSize(size_t* size) const override;
bool ReserveSize(size_t size) override;
char* GetBuffer() { return buffer_; }
const char* GetBuffer() const { return buffer_; }
void SetData(const void* data, size_t length);
StreamResult DoReserve(size_t size, int* error);
// Invariant: 0 <= seek_position <= data_length_ <= buffer_length_
char* buffer_ = nullptr;
size_t buffer_length_ = 0;
size_t data_length_ = 0;
size_t seek_position_ = 0;
} // namespace rtc