1/* 2 * Copyright (C) 2012 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#ifndef WebSocketDeflater_h 32#define WebSocketDeflater_h 33 34#if ENABLE(WEB_SOCKETS) 35 36#include <wtf/Noncopyable.h> 37#include <wtf/OwnPtr.h> 38#include <wtf/PassOwnPtr.h> 39#include <wtf/Vector.h> 40 41struct z_stream_s; 42typedef z_stream_s z_stream; 43 44namespace WebCore { 45 46class WebSocketDeflater { 47 WTF_MAKE_FAST_ALLOCATED; 48public: 49 enum ContextTakeOverMode { 50 DoNotTakeOverContext, 51 TakeOverContext 52 }; 53 static PassOwnPtr<WebSocketDeflater> create(int windowBits, ContextTakeOverMode = TakeOverContext); 54 55 ~WebSocketDeflater(); 56 57 bool initialize(); 58 bool addBytes(const char*, size_t); 59 bool finish(); 60 const char* data() { return m_buffer.data(); } 61 size_t size() const { return m_buffer.size(); } 62 void reset(); 63 64private: 65 WebSocketDeflater(int windowBits, ContextTakeOverMode); 66 67 int m_windowBits; 68 ContextTakeOverMode m_contextTakeOverMode; 69 Vector<char> m_buffer; 70 OwnPtr<z_stream> m_stream; 71}; 72 73class WebSocketInflater { 74 WTF_MAKE_FAST_ALLOCATED; 75public: 76 static PassOwnPtr<WebSocketInflater> create(int windowBits = 15); 77 78 ~WebSocketInflater(); 79 80 bool initialize(); 81 bool addBytes(const char*, size_t); 82 bool finish(); 83 const char* data() { return m_buffer.data(); } 84 size_t size() const { return m_buffer.size(); } 85 void reset(); 86 87private: 88 explicit WebSocketInflater(int windowBits); 89 90 int m_windowBits; 91 Vector<char> m_buffer; 92 OwnPtr<z_stream> m_stream; 93}; 94 95} 96 97#endif // ENABLE(WEB_SOCKETS) 98 99#endif // WebSocketDeflater_h 100