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/*
Miranda IM: the free IM client for Microsoft* Windows*
Copyright 2000-2005 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"
#if 0
extern HANDLE hCacheHeap;
/*
the id cache has id/proto against hContact to lookup ID's fast to resolve to hContact,
the protoBaseCache has hContact's sorted, so can lookup hContact->proto fast, these two caches
share the same data, they're indexes, each entry might not have an "id" set.
There is a small cache which maintains a protocol list
*/
/*
The information we need to cache is not readily available, data has to be gathered at startup
when a new contact is created/deleted, when a new proto registers and so on.
The information we get at startup includes walking the contact chain and reading Protocol/p which
will give us the protocol the contact is on, all this info is stored in contactEntry's within
protoCache ONLY - contactCache is EMPTY at this point.
We can not fetch the id of the contact because this information is only in SOME protocol plugins,
this is a problem but we'll hook all proto registrations and ask each proto if it supports the
returning this ID name, if not - it won't even use our id <-> contact look so no biggie!
*/
typedef struct {
char * proto; // within proto cache
char * id; // optional
HANDLE hContact;
} contactEntry;
typedef struct {
CRITICAL_SECTION csLock;
SortedList contactCache; // index for id/proto -> hContact
SortedList protoCache; // index for hContact -> proto/id
SortedList protoNameCache; // index of protocol names
} contactDir;
static contactDir condir;
// compare's id/proto and return's hContact's
int contactCacheCompare(void * a, void * b)
{
contactEntry * x = (contactEntry *) a;
contactEntry * y = (contactEntry *) b;
int rc=0;
// same protocol?
rc = strcmp(x->proto, y->proto);
if ( rc == 0 ) {
// same id? id's might be missing
if ( x->id && y->id ) rc = strcmp(x->id, y->id);
}
return rc;
}
// compares hContact's and returns associated data
int protoCacheCompare(void * a, void * b)
{
contactEntry * x = (contactEntry *) a;
contactEntry * y = (contactEntry *) b;
if ( x->hContact < y->hContact ) return -1;
if ( x->hContact > y->hContact ) return 1;
return 0;
}
// keeps a list of protocol names
int protoNameCacheCompare(void * a, void * b)
{
return strcmp( (char *)a, (char*)b );
}
// cache the protocol string so that its not allocated per contact but shared
char * contactDir_Proto_Add(contactDir * cd, char * proto)
{
int index = 0 ;
char * szCache = 0;
EnterCriticalSection(&cd->csLock);
if ( List_GetIndex(&cd->protoNameCache, proto, &index) ) szCache = cd->protoNameCache.items[index];
else {
szCache = HeapAlloc(hCacheHeap, HEAP_NO_SERIALIZE, strlen(proto)+1);
strcpy(szCache, proto);
List_Insert(&cd->protoNameCache, szCache, index);
}
LeaveCriticalSection(&cd->csLock);
return szCache;
}
// thread safe
char * contactDir_Proto_Get(contactDir * cd, HANDLE hContact)
{
char * szCache = 0;
int index = 0;
contactEntry e;
e.hContact=hContact;
e.proto="";
e.id="";
EnterCriticalSection(&cd->csLock);
if ( List_GetIndex(&cd->protoCache, &e, &index) ) {
contactEntry * p = cd->protoCache.items[index];
szCache = p->proto;
}
LeaveCriticalSection(&cd->csLock);
return szCache;
}
// thread tolerant, if updating id dont pass proto, if updating proto dont pass id
void contactDir_Contact_Add(contactDir * cd, HANDLE hContact, char * proto, char * id)
{
// if a contact is gonna exist anywhere it's going to be in the ->protoCache which has a key of hContact
// if id is not null then the contact should be indexed via the ->contactCache instead
if ( id == NULL ) {
int index = 0;
contactEntry e;
e.hContact=hContact;
e.proto = proto;
e.id = "";
EnterCriticalSection(&cd->csLock);
if ( List_GetIndex(&cd->protoCache, &e, &index) ) {
contactEntry * p = cd->protoCache.items[index];
// this hContact is in the cache, protcol changing?
p->proto = contactDir_Proto_Add(cd, proto); // just replace the old pointer
} else {
contactEntry * p = 0;
// this hContact isn't in the cache, add it
p = HeapAlloc(hCacheHeap, HEAP_NO_SERIALIZE, sizeof(contactEntry));
p->proto = contactDir_Proto_Add(cd, proto);
p->id = 0;
p->hContact = hContact;
// add it
List_Insert(&cd->protoCache, p, index);
}
LeaveCriticalSection(&cd->csLock);
} else {
// this contact HAS to be in ->protoCache since it was added during startup
// need to find the contactEntry* that should already exist for it
} //if
}
// only expected to be called at startup.
void contactDir_Proto_Walk(contactDir * cd)
{
HANDLE hContact;
char buf[128];
DBCONTACTGETSETTING gsProto;
DBVARIANT dbvProto;
// setup the read structure
gsProto.szModule="Protocol";
gsProto.szSetting="p";
gsProto.pValue = &dbvProto;
// this might not work
hContact = (HANDLE) CallService(MS_DB_CONTACT_FINDFIRST, 0, 0);
while ( hContact ) {
// and how we'll get the reset
dbvProto.type=DBVT_ASCIIZ;
dbvProto.pszVal = (char *) &buf;
dbvProto.cchVal = SIZEOF(buf);
// figure out what hContact/Protocol/p is
if ( CallService(MS_DB_CONTACT_GETSETTINGSTATIC,(WPARAM)hContact, (LPARAM)&gsProto) == 0 ) {
contactDir_Contact_Add(cd, hContact, buf, NULL);
}
// find next
hContact = (HANDLE) CallService(MS_DB_CONTACT_FINDNEXT, (WPARAM)hContact, 0);
}
}
// ctor/dtor
void contactDir_Init(contactDir * cd)
{
InitializeCriticalSection(&cd->csLock);
cd->contactCache.increment=50;
cd->contactCache.sortFunc=contactCacheCompare;
cd->protoCache.increment=50;
cd->protoCache.sortFunc=protoCacheCompare;
cd->protoNameCache.increment=5;
cd->protoNameCache.sortFunc=protoNameCacheCompare;
// build a list of all hContact's and what proto's they are on
contactDir_Proto_Walk(cd);
}
void contactDir_Deinit(contactDir * cd)
{
List_Destroy(&cd->contactCache);
List_Destroy(&cd->protoCache);
List_Destroy(&cd->protoNameCache);
DeleteCriticalSection(&cd->csLock);
}
static int contactDirGetProto(WPARAM wParam, LPARAM lParam)
{
return (int) contactDir_Proto_Get(&condir,(HANDLE)wParam);
}
#endif
void InitContactDir(void)
{
return;
//contactDir_Init(&condir);
//CreateServiceFunction(MS_PROTODIR_PROTOFROMCONTACT, contactDirGetProto);
}
void UninitContactDir(void)
{
return;
#if 0
{
int j;
for ( j = 0; j< condir.protoCache.realCount; j++) {
char buf[128];
contactEntry * p = condir.protoCache.items[j];
mir_snprintf(buf,SIZEOF(buf)," [%s] %s @ %x \n", p->proto, p->id ? p->id : "", p->hContact);
OutputDebugString(buf);
}
}
contactDir_Deinit(&condir);
#endif
}
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