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
|
/*
Miranda Database Tool
Copyright (C) 2001-2005 Richard Hughes
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 (at your option) 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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "../stdafx.h"
int CDb3Mmap::SignatureValid(DWORD ofs, DWORD signature)
{
if (ofs + sizeof(DWORD) >= sourceFileSize) {
cb->pfnAddLogMessage(STATUS_ERROR, TranslateT("Invalid offset found (database truncated?)"));
return 0;
}
DWORD *sig = (DWORD*)(m_pDbCache + ofs);
return *sig == signature;
}
int CDb3Mmap::PeekSegment(DWORD ofs, PVOID buf, int cbBytes)
{
if (ofs >= sourceFileSize) {
cb->pfnAddLogMessage(STATUS_ERROR, TranslateT("Invalid offset found"));
return ERROR_SEEK;
}
DWORD bytesRead;
if (ofs + cbBytes > sourceFileSize)
bytesRead = sourceFileSize - ofs;
else
bytesRead = cbBytes;
if (bytesRead == 0) {
cb->pfnAddLogMessage(STATUS_ERROR, TranslateT("Error reading, database truncated? (%u)"), GetLastError());
return ERROR_READ_FAULT;
}
memcpy(buf, m_pDbCache + ofs, bytesRead);
if ((int)bytesRead<cbBytes) return ERROR_HANDLE_EOF;
return ERROR_SUCCESS;
}
int CDb3Mmap::ReadSegment(DWORD ofs, PVOID buf, int cbBytes)
{
int ret = PeekSegment(ofs, buf, cbBytes);
if (ret != ERROR_SUCCESS && ret != ERROR_HANDLE_EOF) return ret;
if (cb->bAggressive) {
if (ofs + cbBytes > sourceFileSize) {
cb->pfnAddLogMessage(STATUS_WARNING, TranslateT("Can't write to working file, aggressive mode may be too aggressive now"));
memset((m_pDbCache + ofs), 0, (sourceFileSize - ofs));
}
else memset((m_pDbCache + ofs), 0, cbBytes);
}
cb->spaceProcessed += cbBytes;
return ERROR_SUCCESS;
}
DWORD CDb3Mmap::WriteSegment(DWORD ofs, PVOID buf, int cbBytes)
{
DWORD bytesWritten;
if (cb->bCheckOnly) return 0xbfbfbfbf;
if (ofs == WSOFS_END) {
ofs = m_dbHeader.ofsFileEnd;
m_dbHeader.ofsFileEnd += cbBytes;
}
SetFilePointer(cb->hOutFile, ofs, nullptr, FILE_BEGIN);
WriteFile(cb->hOutFile, buf, cbBytes, &bytesWritten, nullptr);
if ((int)bytesWritten < cbBytes) {
cb->pfnAddLogMessage(STATUS_FATAL, TranslateT("Can't write to output file - disk full? (%u)"), GetLastError());
return WS_ERROR;
}
return ofs;
}
int CDb3Mmap::ReadWrittenSegment(DWORD ofs, PVOID buf, int cbBytes)
{
DWORD bytesRead;
if (cb->bCheckOnly) return 0xbfbfbfbf;
if (ofs + cbBytes > m_dbHeader.ofsFileEnd)
return ERROR_SEEK;
SetFilePointer(cb->hOutFile, ofs, nullptr, FILE_BEGIN);
ReadFile(cb->hOutFile, buf, cbBytes, &bytesRead, nullptr);
if ((int)bytesRead < cbBytes)
return ERROR_READ_FAULT;
return ERROR_SUCCESS;
}
|
