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/*
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"
struct ModChainEntry {
DWORD ofsOld, ofsNew;
int size;
char name[257];
} static *modChain = nullptr;
static int modChainCount;
static DWORD ofsCurrent;
static int phase, iCurrentModName;
static DWORD ofsLast;
static int last_mod = 0;
int CDb3Mmap::WorkModuleChain(int firstTime)
{
DBModuleName moduleName, *newModName;
if (firstTime) {
cb->pfnAddLogMessage(STATUS_MESSAGE, TranslateT("Processing module name chain"));
modChainCount = 0;
last_mod = 0;
free(modChain);
modChain = (ModChainEntry*)malloc(sizeof(ModChainEntry));
phase = 0;
ofsCurrent = m_dbHeader.ofsModuleNames;
}
switch (phase) {
case 0:
if (ofsCurrent == 0) {
phase++;
return ERROR_SUCCESS;
}
if (!SignatureValid(ofsCurrent, DBMODULENAME_SIGNATURE)) {
cb->pfnAddLogMessage(STATUS_ERROR, TranslateT("Module chain corrupted, further entries ignored"));
phase++;
return ERROR_SUCCESS;
}
if (PeekSegment(ofsCurrent, &moduleName, offsetof(DBModuleName, name)) != ERROR_SUCCESS) {
phase++;
return ERROR_SUCCESS;
}
modChain = (ModChainEntry*)realloc(modChain, sizeof(ModChainEntry)*++modChainCount);
modChain[modChainCount - 1].ofsOld = ofsCurrent;
modChain[modChainCount - 1].size = offsetof(DBModuleName, name) + moduleName.cbName;
modChain[modChainCount - 1].ofsNew = 0;
if (moduleName.cbName)
PeekSegment(ofsCurrent + offsetof(DBModuleName, name), &modChain[modChainCount - 1].name, moduleName.cbName);
modChain[modChainCount - 1].name[moduleName.cbName] = 0;
ofsCurrent = moduleName.ofsNext;
break;
case 1:
ofsLast = 0;
iCurrentModName = 0;
m_dbHeader.ofsModuleNames = 0;
phase++;
case 2:
if (iCurrentModName >= modChainCount) {
DWORD dw = 0;
if (ofsLast) WriteSegment(ofsLast + offsetof(DBModuleName, ofsNext), &dw, sizeof(DWORD));
return ERROR_NO_MORE_ITEMS;
}
if (modChain[iCurrentModName].ofsNew == 0) {
newModName = (DBModuleName*)_alloca(modChain[iCurrentModName].size);
if (ReadSegment(modChain[iCurrentModName].ofsOld, newModName, modChain[iCurrentModName].size) != ERROR_SUCCESS)
return ERROR_NO_MORE_ITEMS;
if ((modChain[iCurrentModName].ofsNew = WriteSegment(WSOFS_END, newModName, modChain[iCurrentModName].size)) == WS_ERROR)
return ERROR_HANDLE_DISK_FULL;
// check duplicated modulenames
int i, n = 0;
for (i = iCurrentModName + 1; i < modChainCount; i++)
if (!mir_strcmp(modChain[i].name, modChain[iCurrentModName].name)) {
modChain[i].ofsNew = modChain[iCurrentModName].ofsNew;
n++;
}
if (n) {
wchar_t szModuleName[257];
MultiByteToWideChar(CP_ACP, 0, modChain[iCurrentModName].name, -1, szModuleName, _countof(szModuleName));
wchar_t *pszModuleName = szModuleName;
cb->pfnAddLogMessage(STATUS_WARNING, TranslateT("Module name '%s' is not unique: %d duplicates found"), pszModuleName, n);
}
if (iCurrentModName == 0)
m_dbHeader.ofsModuleNames = modChain[iCurrentModName].ofsNew;
else if (WriteSegment(ofsLast + offsetof(DBModuleName, ofsNext), &modChain[iCurrentModName].ofsNew, sizeof(DWORD)) == WS_ERROR)
return ERROR_HANDLE_DISK_FULL;
ofsLast = modChain[iCurrentModName].ofsNew;
}
iCurrentModName++;
break;
}
return ERROR_SUCCESS;
}
DWORD CDb3Mmap::ConvertModuleNameOfs(DWORD ofsOld)
{
if (modChain[last_mod].ofsOld == ofsOld)
return modChain[last_mod].ofsNew;
for (int i = 0; i < modChainCount; i++)
if (modChain[i].ofsOld == ofsOld) {
last_mod = i;
return modChain[last_mod].ofsNew;
}
cb->pfnAddLogMessage(STATUS_ERROR, TranslateT("Invalid module name offset, skipping data"));
return 0;
}
void CDb3Mmap::FreeModuleChain()
{
if (modChain != nullptr) {
free(modChain);
modChain = nullptr;
last_mod = 0;
}
}
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