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/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <wtf/TZoneMalloc.h>
#include <wtf/Vector.h>
struct z_stream_s;
typedef z_stream_s z_stream;
namespace WebCore {
class WebSocketDeflater {
WTF_MAKE_TZONE_ALLOCATED_EXPORT(WebSocketDeflater, WEBCORE_EXPORT);
public:
enum ContextTakeOverMode {
DoNotTakeOverContext,
TakeOverContext
};
explicit WebSocketDeflater(int windowBits, ContextTakeOverMode = TakeOverContext);
WEBCORE_EXPORT ~WebSocketDeflater();
bool initialize();
bool addBytes(std::span<const uint8_t>);
bool finish();
size_t size() const { return m_buffer.size(); }
std::span<const uint8_t> span() const { return m_buffer.span(); }
void reset();
private:
int m_windowBits;
ContextTakeOverMode m_contextTakeOverMode;
Vector<uint8_t> m_buffer;
std::unique_ptr<z_stream> m_stream;
};
class WebSocketInflater {
WTF_MAKE_TZONE_ALLOCATED_EXPORT(WebSocketInflater, WEBCORE_EXPORT);
public:
explicit WebSocketInflater(int windowBits = 15);
WEBCORE_EXPORT ~WebSocketInflater();
bool initialize();
bool addBytes(std::span<const uint8_t>);
bool finish();
size_t size() const { return m_buffer.size(); }
std::span<const uint8_t> span() const { return m_buffer.span(); }
void reset();
private:
int m_windowBits;
Vector<uint8_t> m_buffer;
std::unique_ptr<z_stream> m_stream;
};
} // namespace WebCore
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