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/*
Miranda NG: the free IM client for Microsoft* Windows*
Copyright (C) 2012-13 Miranda NG project,
all portions of this codebase are copyrighted to the people
listed in contributors.txt.
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 "..\..\core\commonheaders.h"
#include "database.h"
static int stringCompare(const char* p1, const char* p2)
{
return strcmp(p1, p2);
}
static int compareGlobals(const DBCachedGlobalValue* p1, const DBCachedGlobalValue* p2)
{
return strcmp(p1->name, p2->name);
}
MDatabaseCache::MDatabaseCache() :
m_lSettings(100, stringCompare),
m_lContacts(50, HandleKeySortT),
m_lGlobalSettings(50, compareGlobals)
{
m_hCacheHeap = HeapCreate(0, 0, 0);
InitializeCriticalSection(&m_cs);
}
MDatabaseCache::~MDatabaseCache()
{
m_lContacts.destroy();
m_lSettings.destroy();
m_lGlobalSettings.destroy();
HeapDestroy(m_hCacheHeap);
DeleteCriticalSection(&m_cs);
}
/////////////////////////////////////////////////////////////////////////////////////////
DBCachedContact* MDatabaseCache::AddContactToCache(HANDLE hContact)
{
mir_cslock lck(m_cs);
int index = m_lContacts.getIndex((DBCachedContact*)&hContact);
if (index == -1) {
DBCachedContact* VL = (DBCachedContact*)HeapAlloc(m_hCacheHeap, HEAP_ZERO_MEMORY, sizeof(DBCachedContact));
VL->hContact = hContact;
m_lContacts.insert(VL);
return VL;
}
return m_lContacts[ index ];
}
DBCachedContact* MDatabaseCache::GetCachedContact(HANDLE hContact)
{
mir_cslock lck(m_cs);
int index = m_lContacts.getIndex((DBCachedContact*)&hContact);
return (index == -1) ? NULL : m_lContacts[index];
}
void MDatabaseCache::FreeCachedContact(HANDLE hContact)
{
mir_cslock lck(m_cs);
int index = m_lContacts.getIndex((DBCachedContact*)&hContact);
if (index == -1)
return;
DBCachedContact* VL = m_lContacts[index];
DBCachedContactValue* V = VL->first;
while (V != NULL) {
DBCachedContactValue* V1 = V->next;
FreeCachedVariant(&V->value);
HeapFree( m_hCacheHeap, 0, V );
V = V1;
}
HeapFree( m_hCacheHeap, 0, VL );
m_lContacts.remove(index);
for (int i=0; i < m_lContacts.getCount(); i++) {
DBCachedContact *cc = m_lContacts[i];
if (cc->hNext == hContact)
cc->hNext = NULL;
}
}
/////////////////////////////////////////////////////////////////////////////////////////
char* MDatabaseCache::InsertCachedSetting(const char* szName, int cbLen)
{
char* newValue = (char*)HeapAlloc(m_hCacheHeap, 0, cbLen);
*newValue++ = 0;
strcpy(newValue, szName);
m_lSettings.insert(newValue);
return newValue;
}
char* MDatabaseCache::GetCachedSetting(const char *szModuleName,const char *szSettingName, int moduleNameLen, int settingNameLen)
{
char szFullName[512];
const char *szKey;
if (szModuleName != NULL) {
strcpy(szFullName, szModuleName);
szFullName[moduleNameLen] = '/';
strcpy(szFullName+moduleNameLen+1,szSettingName);
szKey = szFullName;
}
else szKey = szSettingName;
if (m_lastSetting && !strcmp(szKey, m_lastSetting))
return m_lastSetting;
int index = m_lSettings.getIndex((char*)szKey);
if (index != -1)
m_lastSetting = m_lSettings[index];
else
m_lastSetting = InsertCachedSetting(szKey, settingNameLen+moduleNameLen+3);
return m_lastSetting;
}
void MDatabaseCache::SetCachedVariant(DBVARIANT* s /* new */, DBVARIANT* d /* cached */ )
{
char* szSave = ( d->type == DBVT_UTF8 || d->type == DBVT_ASCIIZ ) ? d->pszVal : NULL;
memcpy( d, s, sizeof( DBVARIANT ));
if (( s->type == DBVT_UTF8 || s->type == DBVT_ASCIIZ ) && s->pszVal != NULL ) {
if ( szSave != NULL )
d->pszVal = (char*)HeapReAlloc(m_hCacheHeap,0,szSave,strlen(s->pszVal)+1);
else
d->pszVal = (char*)HeapAlloc(m_hCacheHeap,0,strlen(s->pszVal)+1);
strcpy(d->pszVal,s->pszVal);
}
else if ( szSave != NULL ) {
HeapFree(m_hCacheHeap,0,szSave);
d->pszVal = NULL;
}
}
void MDatabaseCache::FreeCachedVariant(DBVARIANT* V)
{
if (( V->type == DBVT_ASCIIZ || V->type == DBVT_UTF8 ) && V->pszVal != NULL )
HeapFree(m_hCacheHeap,0,V->pszVal);
}
STDMETHODIMP_(DBVARIANT*) MDatabaseCache::GetCachedValuePtr(HANDLE hContact, char *szSetting, int bAllocate)
{
// a global setting
if ( hContact == 0 ) {
DBCachedGlobalValue Vtemp, *V;
Vtemp.name = szSetting;
int index = m_lGlobalSettings.getIndex(&Vtemp);
if (index != -1) {
V = m_lGlobalSettings[index];
if ( bAllocate == -1 ) {
FreeCachedVariant( &V->value );
m_lGlobalSettings.remove(index);
HeapFree(m_hCacheHeap,0,V);
return NULL;
}
}
else {
if ( bAllocate != 1 )
return NULL;
V = (DBCachedGlobalValue*)HeapAlloc(m_hCacheHeap,HEAP_ZERO_MEMORY,sizeof(DBCachedGlobalValue));
V->name = szSetting;
m_lGlobalSettings.insert(V);
}
return &V->value;
}
// a contact setting
DBCachedContactValue *V, *V1;
DBCachedContact VLtemp,*VL;
VLtemp.hContact = hContact;
int index = m_lContacts.getIndex(&VLtemp);
if (index == -1) {
if ( bAllocate != 1 )
return NULL;
VL = AddContactToCache(hContact);
}
else VL = m_lContacts[index];
m_lastVL = VL;
for ( V = VL->first; V != NULL; V = V->next)
if (V->name == szSetting)
break;
if ( V == NULL ) {
if ( bAllocate != 1 )
return NULL;
V = (DBCachedContactValue *)HeapAlloc(m_hCacheHeap, HEAP_ZERO_MEMORY, sizeof(DBCachedContactValue));
if (VL->last)
VL->last->next = V;
else
VL->first = V;
VL->last = V;
V->name = szSetting;
}
else if ( bAllocate == -1 ) {
m_lastVL = NULL;
FreeCachedVariant(&V->value);
if ( VL->first == V ) {
VL->first = V->next;
if (VL->last == V)
VL->last = V->next; // NULL
}
else
for ( V1 = VL->first; V1 != NULL; V1 = V1->next )
if ( V1->next == V ) {
V1->next = V->next;
if (VL->last == V)
VL->last = V1;
break;
}
HeapFree(m_hCacheHeap,0,V);
return NULL;
}
return &V->value;
}
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