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/*
Miranda IM: the free IM client for Microsoft* Windows*
Copyright 2000-2003 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 "commonheaders.h"
#include "database.h"
extern struct DBHeader dbHeader;
static INT_PTR EnumModuleNames(WPARAM wParam,LPARAM lParam);
struct ModuleName {
char *name;
DWORD hash;
DWORD ofs;
};
static struct ModuleName *moduleName;
static int moduleNameCount;
int InitModuleNames(void)
{
struct DBModuleName *dbmn;
DWORD ofsThis,ofsNext;
int nameLen;
moduleNameCount=0;
moduleName=NULL;
ofsThis=dbHeader.ofsFirstModuleName;
dbmn=(struct DBModuleName*)DBRead(ofsThis,sizeof(struct DBModuleName),NULL);
while(ofsThis) {
if(dbmn->signature!=DBMODULENAME_SIGNATURE) DatabaseCorruption();
moduleName=(struct ModuleName*)mir_realloc(moduleName,sizeof(struct ModuleName)*(moduleNameCount+1));
moduleName[moduleNameCount].ofs=ofsThis;
moduleName[moduleNameCount].hash=dbmn->cbName; //very very simple hash so far
moduleName[moduleNameCount].name=(char*)mir_alloc(dbmn->cbName+1);
ofsNext=dbmn->ofsNext;
nameLen=dbmn->cbName;
CopyMemory(moduleName[moduleNameCount].name,DBRead(ofsThis+offsetof(struct DBModuleName,name),nameLen,NULL),nameLen);
moduleName[moduleNameCount].name[nameLen]=0;
moduleNameCount++;
ofsThis=ofsNext;
dbmn=(struct DBModuleName*)DBRead(ofsThis,sizeof(struct DBModuleName),NULL);
}
CreateServiceFunction(MS_DB_MODULES_ENUM,EnumModuleNames);
return 0;
}
void UninitModuleNames(void)
{
int i;
for(i=0;i<moduleNameCount;i++) mir_free(moduleName[i].name);
if(moduleNameCount) mir_free(moduleName);
}
static DWORD FindExistingModuleNameOfs(const char *szName,int nameLen)
{
int i;
for(i=0;i<moduleNameCount;i++)
if(moduleName[i].hash==(DWORD)nameLen && !strcmp(moduleName[i].name,szName)) return moduleName[i].ofs;
return 0;
}
//will create the offset if it needs to
DWORD GetModuleNameOfs(const char *szName)
{
struct DBModuleName dbmn;
int nameLen=(int)strlen(szName);
DWORD ofsNew,ofsExisting;
ofsExisting=FindExistingModuleNameOfs(szName,nameLen);
if(ofsExisting) return ofsExisting;
//need to create the module name
ofsNew=CreateNewSpace(nameLen+offsetof(struct DBModuleName,name));
dbmn.signature=DBMODULENAME_SIGNATURE;
dbmn.cbName=nameLen;
dbmn.ofsNext=dbHeader.ofsFirstModuleName;
dbHeader.ofsFirstModuleName=ofsNew;
DBWrite(0,&dbHeader,sizeof(dbHeader));
DBWrite(ofsNew,&dbmn,offsetof(struct DBModuleName,name));
DBWrite(ofsNew+offsetof(struct DBModuleName,name),(PVOID)szName,nameLen);
DBFlush(0);
//add to cache
moduleName=(struct ModuleName*)mir_realloc(moduleName,sizeof(struct ModuleName)*(moduleNameCount+1));
moduleName[moduleNameCount].ofs=ofsNew;
moduleName[moduleNameCount].hash=nameLen; //very very simple hash so far
moduleName[moduleNameCount].name=(char*)mir_alloc(nameLen+1);
strcpy(moduleName[moduleNameCount].name,szName);
moduleNameCount++;
//quit
return ofsNew;
}
//it's OK that this is a bit slow - it's rarely used
char *GetModuleNameByOfs(DWORD ofs)
{
int i;
for(i=0;i<moduleNameCount;i++)
if(moduleName[i].ofs==ofs) return moduleName[i].name;
DatabaseCorruption();
return NULL;
}
static INT_PTR EnumModuleNames(WPARAM wParam,LPARAM lParam)
{
int i;
INT_PTR ret;
for(i=0;i<moduleNameCount;i++) {
ret=((DBMODULEENUMPROC)lParam)(moduleName[i].name,moduleName[i].ofs,wParam);
if (ret) return ret;
}
return 0;
}
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