bool QFile::at( Offset pos )
{
if ( !isOpen() ) {
#if defined(QT_CHECK_STATE)
qWarning( "QFile::at: File is not open" );
#endif
return FALSE;
}
if ( isSequentialAccess() )
return FALSE;
bool ok;
if ( isRaw() ) {
off_t l = ::lseek( fd, pos, SEEK_SET );
ok = ( l != -1 );
pos = (Offset)l;
} else { // buffered file
#if defined(QT_LARGEFILE_SUPPORT)
ok = ( ::fseeko(fh, pos, SEEK_SET) == 0 );
#else
ok = ( ::fseek(fh, pos, SEEK_SET) == 0 );
#endif
}
if ( ok )
#if defined(QT_LARGEFILE_SUPPORT) && !defined(QT_ABI_QT4)
ioIndex = pos > UINT_MAX ? UINT_MAX : (Offset)pos;
#else
ioIndex = (Offset)pos;
#endif
#if defined(QT_CHECK_RANGE)
else
bool QIODevice::atEnd() const
{
if ( isSequentialAccess() || isTranslated() ) {
QIODevice* that = (QIODevice*)this;
int c = that->getch();
bool result = c < 0;
that->ungetch(c);
return result;
} else {
return at() == (int)size();
}
}
bool QFileHack::open ( int m ) {
bool ret;
#ifdef __linux__
m |= IO_Async; //On linux, set O_NONBLOCK, opens CD-ROMs faster
#endif
ret=TQFile::open(m);
if (ret && isSequentialAccess() ) {
setType(IO_Direct);
}
return ret;
}
bool QIODevice::atEnd() const
{
if ( isSequentialAccess() || isTranslated() ) {
QIODevice* that = (QIODevice*)this;
const int oldStatus = ioSt;
int c = that->getch();
bool result = c < 0;
that->ungetch(c);
if (ioSt != oldStatus)
that->ioSt = oldStatus;
return result;
} else {
return at() == size();
}
}
