FastFileReader::FastFileReader( const lem::Path& filename )
:Stream(true,false,filename)
{
hFile = NULL;
hFileMap = NULL;
OrgAdr = EndAdr = NULL;
filesize.LowPart = filesize.HighPart = 0;
binary=true;
hFile = CreateFileW(
filename.GetUnicode().c_str(),
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
0,
NULL
);
LEM_CHECKIT_Z(hFile!=(HANDLE)-1);
if( hFile==(HANDLE)-1 )
return;
hFileMap = CreateFileMapping( hFile, NULL, PAGE_READONLY, 0, 0, NULL );
LEM_CHECKIT_Z(hFileMap!=NULL);
if( hFileMap==NULL )
return;
OrgAdr = (lem::uint8_t*)MapViewOfFile( hFileMap, FILE_MAP_READ, 0, 0, 0 );
LEM_CHECKIT_Z(OrgAdr!=NULL);
if( OrgAdr==NULL )
return;
#if defined LEM_QT
quint64 i64 = QFileInfo(filename.GetUnicode().to_qt()).size();
filesize.QuadPart = i64;
#elif (defined LEM_MSC && _MSC_VER<1300) || defined LEM_WIN98
filesize.LowPart = GetFileSize( hFile, (unsigned long*)&filesize.HighPart );
LEM_CHECKIT_Z( filesize.LowPart!=INVALID_FILE_SIZE );
#else
BOOL res = GetFileSizeEx( hFile, &filesize );
LEM_CHECKIT_Z( res!=0 );
#endif
CurAdr = OrgAdr;
EndAdr = OrgAdr+filesize.LowPart;
return;
}
void NGramsStorage_SQLITE::Connect( const lem::Path &connection_string )
{
hdb = lem::sqlite_open_serialized(connection_string.GetUnicode());
lem::sqlite_execute( hdb, "PRAGMA temp_store = MEMORY" );
return;
}