database cache migration, phase 1

git-svn-id: http://svn.miranda-ng.org/main/trunk@1772 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c

1 files changed, 233 insertions, 0 deletions

diff --git a/src/modules/database/mdatabasecache.cpp b/src/modules/database/mdatabasecache.cpp
new file mode 100644
index 0000000000..abb24dd0fe
--- /dev/null
+++ b/src/modules/database/mdatabasecache.cpp
@@ -0,0 +1,233 @@
+/*

+

+Miranda IM: the free IM client for Microsoft* Windows*

+

+Copyright 2000-2010 Miranda ICQ/IM 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+1, p2+1);

+}

+

+static int compareGlobals(const DBCachedGlobalValue* p1, const DBCachedGlobalValue* p2)

+{	return strcmp(p1->name, p2->name);

+}

+

+MDatabaseCache::MDatabaseCache() :

+	m_lSettings(100, stringCompare),

+	m_lContacts(50, LIST<DBCachedContact>::FTSortFunc(HandleKeySort)),

+	m_lGlobalSettings(50, compareGlobals)

+{

+	m_hCacheHeap = HeapCreate(0, 0, 0);

+}

+

+MDatabaseCache::~MDatabaseCache()

+{

+	HeapDestroy(m_hCacheHeap);

+	m_lContacts.destroy();

+	m_lSettings.destroy();

+	m_lGlobalSettings.destroy();

+}

+

+/////////////////////////////////////////////////////////////////////////////////////////

+

+DBCachedContact* MDatabaseCache::AddContactToCache(HANDLE hContact)

+{

+	DBCachedContact* VL = (DBCachedContact*)HeapAlloc(m_hCacheHeap, HEAP_ZERO_MEMORY, sizeof(DBCachedContact));

+	VL->hContact = hContact;

+	m_lContacts.insert(VL);

+	return VL;

+}

+

+DBCachedContact* MDatabaseCache::GetCachedContact(HANDLE hContact)

+{

+	DBCachedContact VLtemp = { hContact };

+	int index = m_lContacts.getIndex(&VLtemp);

+	return (index == -1) ? NULL : m_lContacts[index];

+}

+

+void MDatabaseCache::FreeCachedContact(HANDLE hContact)

+{

+	DBCachedContact VLtemp = { hContact };

+	int index = m_lContacts.getIndex(&VLtemp);

+	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);

+}

+

+/////////////////////////////////////////////////////////////////////////////////////////

+

+char* MDatabaseCache::InsertCachedSetting(const char* szName, int cbLen)

+{

+	char* newValue = (char*)HeapAlloc(m_hCacheHeap, 0, cbLen);

+	*newValue = 0;

+	strcpy(newValue+1, szName+1);

+	m_lSettings.insert(newValue);

+	return newValue;

+}

+

+char* MDatabaseCache::GetCachedSetting(const char *szModuleName,const char *szSettingName, int moduleNameLen, int settingNameLen)

+{

+	char szFullName[512];

+	strcpy(szFullName+1,szModuleName);

+	szFullName[moduleNameLen+1] = '/';

+	strcpy(szFullName+moduleNameLen+2,szSettingName);

+

+	if (m_lastSetting && strcmp(szFullName+1, m_lastSetting) == 0)

+		return m_lastSetting;

+

+	int index = m_lSettings.getIndex(szFullName);

+	if (index != -1)

+		m_lastSetting = m_lSettings[index]+1;

+	else

+		m_lastSetting = InsertCachedSetting( szFullName, settingNameLen+moduleNameLen+3)+1;

+

+	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);

+

+#ifdef DBLOGGING

+	switch( d->type ) {

+		case DBVT_BYTE:	log1( "set cached byte: %d", d->bVal ); break;

+		case DBVT_WORD:	log1( "set cached word: %d", d->wVal ); break;

+		case DBVT_DWORD:	log1( "set cached dword: %d", d->dVal ); break;

+		case DBVT_UTF8:

+		case DBVT_ASCIIZ: log1( "set cached string: '%s'", d->pszVal ); break;

+		default:				log1( "set cached crap: %d", d->type ); break;

+	}

+#endif

+}

+

+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;

+}