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 | #pragma once |
32 | |
33 | #include <wtf/Vector.h> |
34 | |
35 | struct z_stream_s; |
36 | typedef z_stream_s z_stream; |
37 | |
38 | namespace WebCore { |
39 | |
40 | class WebSocketDeflater { |
41 | WTF_MAKE_FAST_ALLOCATED; |
42 | public: |
43 | enum ContextTakeOverMode { |
44 | DoNotTakeOverContext, |
45 | TakeOverContext |
46 | }; |
47 | |
48 | explicit WebSocketDeflater(int windowBits, ContextTakeOverMode = TakeOverContext); |
49 | ~WebSocketDeflater(); |
50 | |
51 | bool initialize(); |
52 | bool addBytes(const char*, size_t); |
53 | bool finish(); |
54 | const char* data() { return m_buffer.data(); } |
55 | size_t size() const { return m_buffer.size(); } |
56 | void reset(); |
57 | |
58 | private: |
59 | int m_windowBits; |
60 | ContextTakeOverMode m_contextTakeOverMode; |
61 | Vector<char> m_buffer; |
62 | std::unique_ptr<z_stream> m_stream; |
63 | }; |
64 | |
65 | class WebSocketInflater { |
66 | WTF_MAKE_FAST_ALLOCATED; |
67 | public: |
68 | explicit WebSocketInflater(int windowBits = 15); |
69 | ~WebSocketInflater(); |
70 | |
71 | bool initialize(); |
72 | bool addBytes(const char*, size_t); |
73 | bool finish(); |
74 | const char* data() { return m_buffer.data(); } |
75 | size_t size() const { return m_buffer.size(); } |
76 | void reset(); |
77 | |
78 | private: |
79 | int m_windowBits; |
80 | Vector<char> m_buffer; |
81 | std::unique_ptr<z_stream> m_stream; |
82 | }; |
83 | |
84 | } // namespace WebCore |
85 | |