virtual bool on_eof_event(abort_callback & p_abort) {
if (get_no_looping() && m_current == &m_body)
return false;
switch_to(m_body);
raw_seek((t_uint64)0,p_abort);
return true;
}
ChEXPORT void SsrwOOCacheStream::seek (long in_offset, SsrwOOSeekPos in_pos)
{
ChLOG_DEBUG_START_FN;
long offset = in_offset;
if (in_pos == STG_CUR)
{
// the position of the underlying stream is actually m_bytesCached ahead of where the caller thinks it is
// adjust for this so that the new position is correct
in_offset -= m_bytesCached;
}
else if (in_pos == STG_START)
{
// calculate how far (relatively) we are moving in a offset-from-start seek to see if we can just adjust the cache
offset = in_offset - getPos();
}
else
{
// seek-from-end will never try to just adjust the cache
offset = INT_MIN;
}
// we have to have some bytes cached to do this, otherwise we don't know that the real underlying stream pos
// is in sync with the end of the cache
if ((offset < (long)m_bytesCached) && (offset >= (m_cache - m_pCurrent)) && (m_bytesCached>0))
{
// in this case the offset we are attempting to reach is already in the cache - adjust the cache offset to
// point to it and *do not* seek on the underlying stream or clear the cache
m_pCurrent += offset;
m_bytesCached -= offset;
return;
}
raw_seek(in_offset, in_pos);
ClearCache();
}
