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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/*
* The Mana Client
* Copyright (C) 2004-2009 The Mana World Development Team
* Copyright (C) 2009-2012 The Mana Developers
*
* This file is part of The Mana Client.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "utils/zlib.h"
#include "log.h"
#include <cassert>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <zlib.h>
/**
* Inflates either zlib or gzip deflated memory. The inflated memory is
* expected to be freed by the caller.
*/
int inflateMemory(unsigned char *in, unsigned int inLength,
unsigned char *&out, unsigned int &outLength)
{
int bufferSize = 256 * 1024;
int ret;
z_stream strm;
out = (unsigned char*) malloc(bufferSize);
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
strm.opaque = Z_NULL;
strm.next_in = in;
strm.avail_in = inLength;
strm.next_out = out;
strm.avail_out = bufferSize;
ret = inflateInit2(&strm, 15 + 32);
if (ret != Z_OK)
return ret;
do
{
if (strm.next_out == NULL)
{
inflateEnd(&strm);
return Z_MEM_ERROR;
}
ret = inflate(&strm, Z_NO_FLUSH);
assert(ret != Z_STREAM_ERROR);
switch (ret)
{
case Z_NEED_DICT:
ret = Z_DATA_ERROR;
case Z_DATA_ERROR:
case Z_MEM_ERROR:
(void) inflateEnd(&strm);
return ret;
}
if (ret != Z_STREAM_END)
{
out = (unsigned char*) realloc(out, bufferSize * 2);
if (out == NULL)
{
inflateEnd(&strm);
return Z_MEM_ERROR;
}
strm.next_out = out + bufferSize;
strm.avail_out = bufferSize;
bufferSize *= 2;
}
}
while (ret != Z_STREAM_END);
assert(strm.avail_in == 0);
outLength = bufferSize - strm.avail_out;
(void) inflateEnd(&strm);
return ret == Z_STREAM_END ? Z_OK : Z_DATA_ERROR;
}
int inflateMemory(unsigned char *in, unsigned int inLength,
unsigned char *&out)
{
unsigned int outLength = 0;
int ret = inflateMemory(in, inLength, out, outLength);
if (ret != Z_OK || out == NULL)
{
if (ret == Z_MEM_ERROR)
{
logger->log("Error: Out of memory while decompressing data!");
}
else if (ret == Z_VERSION_ERROR)
{
logger->log("Error: Incompatible zlib version!");
}
else if (ret == Z_DATA_ERROR)
{
logger->log("Error: Incorrect zlib compressed data!");
}
else
{
logger->log("Error: Unknown error while decompressing data!");
}
free(out);
out = NULL;
outLength = 0;
}
return outLength;
}
void *loadCompressedFile(const std::string &filename, int &filesize)
{
std::ifstream file;
file.open(filename.c_str(), std::ios::in);
if (file.is_open())
{
// Get length of file
file.seekg (0, std::ios::end);
filesize = file.tellg();
file.seekg(0, std::ios::beg);
char *buffer = (char *) malloc(filesize);
file.read(buffer, filesize);
file.close();
unsigned char *inflated;
unsigned int inflatedSize;
if (filename.find(".gz", filename.length() - 3) != std::string::npos)
{
// Inflate the gzipped map data
inflatedSize =
inflateMemory((unsigned char*) buffer, filesize, inflated);
free(buffer);
if (!inflated)
{
logger->log("Could not decompress file: %s",
filename.c_str());
return NULL;
}
filesize = inflatedSize;
return inflated;
}
else
{
return buffer;
}
}
else
{
logger->log("Error loading file from drive: %s", filename.c_str());
}
return NULL;
}
|
