Source/modules/websockets/WebSocketDeflater.h - Issue 639333003: Delete the old WebSocket implementation.

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Issue 639333003: Delete the old WebSocket implementation. (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master

Patch Set: rebase Created 6 years, 2 months ago

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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 #include "wtf/Noncopyable.h"

35 #include "wtf/OwnPtr.h"

36 #include "wtf/PassOwnPtr.h"

37 #include "wtf/Vector.h"

38

39 struct z_stream_s;

40 typedef z_stream_s z_stream;

41

42 namespace blink {

43

44 class WebSocketDeflater {

45 WTF_MAKE_FAST_ALLOCATED;

46 public:

47 // This enum is reused for histogram. When this needs to be modified, add a

48 // new enum for histogram and convert mode values into values in the new

49 // enum to keep new data consistent with old one.

50 enum ContextTakeOverMode {

51 DoNotTakeOverContext,

52 TakeOverContext,

53 ContextTakeOverModeMax,

54 };

55 static PassOwnPtr<WebSocketDeflater> create(int windowBits, ContextTakeOverM ode = TakeOverContext);

56

57 ~WebSocketDeflater();

58

59 bool initialize();

60 bool addBytes(const char*, size_t);

61 bool finish();

62 const char* data() { return m_buffer.data(); }

63 size_t size() const { return m_buffer.size(); }

64 // Reset the deflate result.

65 void softReset();

66 // Reset the deflate result and internal state if the take over mode is DoNo tTakeOverContext.

67 void reset();

68

69 private:

70 WebSocketDeflater(int windowBits, ContextTakeOverMode);

71

72 int m_windowBits;

73 ContextTakeOverMode m_contextTakeOverMode;

74 bool m_isBytesAdded;

75 Vector<char> m_buffer;

76 OwnPtr<z_stream> m_stream;

77 };

78

79 class WebSocketInflater {

80 WTF_MAKE_FAST_ALLOCATED;

81 public:

82 static PassOwnPtr<WebSocketInflater> create(int windowBits = 15);

83

84 ~WebSocketInflater();

85

86 bool initialize();

87 bool addBytes(const char*, size_t);

88 bool finish();

89 const char* data() { return m_buffer.data(); }

90 size_t size() const { return m_buffer.size(); }

91 // Reset the inflate result.

92 void reset();

93

94 private:

95 explicit WebSocketInflater(int windowBits);

96

97 int m_windowBits;

98 Vector<char> m_buffer;

99 OwnPtr<z_stream> m_stream;

100 };

101

102 }

103

104 #endif // WebSocketDeflater_h

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