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
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
/**************************************************************************/
/* */
/* 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. */
/* */
/**************************************************************************/
#include "Z.h"
#include "Misc.h"
int ZCompress(z_stream *stream, unsigned char *dest, unsigned int *destLen,
const unsigned char *source, unsigned int sourceLen)
{
//
// Deal with the possible overflow.
//
if (stream -> total_out & 0x80000000)
{
#ifdef TEST
*logofs << "ZCompress: Reset stream counters with "
<< "total in " << stream -> total_in
<< " and total out " << stream -> total_out
<< ".\n" << logofs_flush;
#endif
stream -> total_in = 0;
stream -> total_out = 0;
}
unsigned int saveOut = stream -> total_out;
stream -> next_in = (Bytef *) source;
stream -> avail_in = sourceLen;
//
// Check if the source is bigger than
// 64K on 16-bit machine.
//
#ifdef MAXSEG_64K
if ((uLong) stream -> avail_in != sourceLen) return Z_BUF_ERROR;
#endif
stream -> next_out = dest;
stream -> avail_out = *destLen;
#ifdef MAXSEG_64K
if ((uLong) stream -> avail_out != *destLen) return Z_BUF_ERROR;
#endif
int result = deflate(stream, Z_FINISH);
if (result != Z_STREAM_END)
{
deflateReset(stream);
return (result == Z_OK ? Z_BUF_ERROR : result);
}
*destLen = stream -> total_out - saveOut;
result = deflateReset(stream);
return result;
}
int ZDecompress(z_stream *stream, unsigned char *dest, unsigned int *destLen,
const unsigned char *source, unsigned int sourceLen)
{
stream -> next_in = (Bytef *) source;
stream -> avail_in = sourceLen;
//
// Deal with the possible overflow.
//
if (stream -> total_out & 0x80000000)
{
#ifdef TEST
*logofs << "ZDecompress: Reset stream counters with "
<< "total in " << stream -> total_in
<< " and total out " << stream -> total_out
<< ".\n" << logofs_flush;
#endif
stream -> total_in = 0;
stream -> total_out = 0;
}
unsigned int saveOut = stream -> total_out;
if (stream -> avail_in != sourceLen)
{
return Z_BUF_ERROR;
}
stream -> next_out = dest;
stream -> avail_out = *destLen;
if (stream -> avail_out != *destLen)
{
return Z_BUF_ERROR;
}
int result = inflate(stream, Z_FINISH);
if (result != Z_STREAM_END)
{
inflateReset(stream);
return (result == Z_OK ? Z_BUF_ERROR : result);
}
*destLen = stream -> total_out - saveOut;
result = inflateReset(stream);
return result;
}
|
