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/*
Miranda NG: the free IM client for Microsoft* Windows*
Copyright (C) 2012-14 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, NumericKeySortT),
m_lGlobalSettings(50, compareGlobals)
{
m_hCacheHeap = HeapCreate(0, 0, 0);
}
MDatabaseCache::~MDatabaseCache()
{
for (int i = 0; i < m_lContacts.getCount(); i++)
mir_free(m_lContacts[i]->pSubs);
HeapDestroy(m_hCacheHeap);
}
/////////////////////////////////////////////////////////////////////////////////////////
DBCachedContact* MDatabaseCache::AddContactToCache(MCONTACT contactID)
{
mir_cslock lck(m_cs);
int index = m_lContacts.getIndex((DBCachedContact*)&contactID);
if (index != -1)
return m_lContacts[index];
DBCachedContact *cc = (DBCachedContact*)HeapAlloc(m_hCacheHeap, HEAP_ZERO_MEMORY, sizeof(DBCachedContact));
cc->contactID = contactID;
cc->nSubs = -1;
m_lContacts.insert(cc);
return cc;
}
DBCachedContact* MDatabaseCache::GetCachedContact(MCONTACT contactID)
{
mir_cslock lck(m_cs);
int index = m_lContacts.getIndex((DBCachedContact*)&contactID);
return (index == -1) ? NULL : m_lContacts[index];
}
DBCachedContact* MDatabaseCache::GetFirstContact()
{
mir_cslock lck(m_cs);
return m_lContacts[0];
}
DBCachedContact* MDatabaseCache::GetNextContact(MCONTACT contactID)
{
mir_cslock lck(m_cs);
int index = m_lContacts.getIndex((DBCachedContact*)&contactID);
return (index == -1) ? NULL : m_lContacts[index+1];
}
void MDatabaseCache::FreeCachedContact(MCONTACT contactID)
{
mir_cslock lck(m_cs);
int index = m_lContacts.getIndex((DBCachedContact*)&contactID);
if (index == -1)
return;
DBCachedContact *cc = m_lContacts[index];
DBCachedContactValue* V = cc->first;
while (V != NULL) {
DBCachedContactValue* V1 = V->next;
FreeCachedVariant(&V->value);
HeapFree(m_hCacheHeap, 0, V);
V = V1;
}
mir_free(cc->pSubs);
HeapFree(m_hCacheHeap, 0, cc);
m_lContacts.remove(index);
}
/////////////////////////////////////////////////////////////////////////////////////////
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);
}
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(MCONTACT contactID, char *szSetting, int bAllocate)
{
// a global setting
if (contactID == 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 ccTemp, *cc;
ccTemp.contactID = contactID;
int index = m_lContacts.getIndex(&ccTemp);
if (index == -1)
return NULL;
m_lastVL = cc = m_lContacts[index];
for (V = cc->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 (cc->last)
cc->last->next = V;
else
cc->first = V;
cc->last = V;
V->name = szSetting;
}
else if (bAllocate == -1) {
m_lastVL = NULL;
FreeCachedVariant(&V->value);
if (cc->first == V) {
cc->first = V->next;
if (cc->last == V)
cc->last = V->next; // NULL
}
else
for (V1 = cc->first; V1 != NULL; V1 = V1->next)
if (V1->next == V) {
V1->next = V->next;
if (cc->last == V)
cc->last = V1;
break;
}
HeapFree(m_hCacheHeap, 0, V);
return NULL;
}
return &V->value;
}
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