1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/**************************************************************************/
/* */
/* Copyright (c) 2001, 2009 NoMachine, http://www.nomachine.com/. */
/* */
/* NXCOMP, NX protocol compression and NX extensions to this software */
/* are copyright of NoMachine. Redistribution and use of the present */
/* software is allowed according to terms specified in the file LICENSE */
/* which comes in the source distribution. */
/* */
/* Check http://www.nomachine.com/licensing.html for applicability. */
/* */
/* NX and NoMachine are trademarks of Medialogic S.p.A. */
/* */
/* All rights reserved. */
/* */
/**************************************************************************/
#ifndef StaticCompressor_H
#define StaticCompressor_H
#include "Z.h"
class EncodeBuffer;
class DecodeBuffer;
class StaticCompressor
{
public:
StaticCompressor(int compressionLevel, int compressionThreshold);
~StaticCompressor();
int compressBuffer(const unsigned char *plainBuffer, const unsigned int plainSize,
unsigned char *&compressedBuffer, unsigned int &compressedSize,
EncodeBuffer &encodeBuffer);
int compressBuffer(const unsigned char *plainBuffer, const unsigned int plainSize,
unsigned char *&compressedBuffer, unsigned int &compressedSize);
int decompressBuffer(unsigned char *plainBuffer, unsigned int plainSize,
const unsigned char *&compressedBuffer, unsigned int &compressedSize,
DecodeBuffer &decodeBuffer);
int decompressBuffer(unsigned char *plainBuffer, const unsigned int plainSize,
const unsigned char *compressedBuffer, const unsigned compressedSize);
static int isCompressionLevel(int compressionLevel)
{
return (compressionLevel == Z_DEFAULT_COMPRESSION ||
(compressionLevel >= Z_NO_COMPRESSION &&
compressionLevel <= Z_BEST_COMPRESSION));
}
int fullReset()
{
return (deflateReset(&compressionStream_) == Z_OK &&
inflateReset(&decompressionStream_) == Z_OK);
}
private:
z_stream compressionStream_;
z_stream decompressionStream_;
unsigned char *buffer_;
unsigned int bufferSize_;
int threshold_;
};
#endif
|
