static HRESULT WINAPI IEnumPinsImpl_Reset(IEnumPins * iface)
{
IEnumPinsImpl *This = impl_from_IEnumPins(iface);
TRACE("(%p)->()\n", iface);
This->Version = This->receive_version(This->base);
This->uIndex = 0;
return S_OK;
}
static HRESULT WINAPI IEnumPinsImpl_Skip(IEnumPins * iface, ULONG cPins)
{
IEnumPinsImpl *This = impl_from_IEnumPins(iface);
TRACE("(%p)->(%u)\n", iface, cPins);
if (This->Version != This->receive_version(This->base))
return VFW_E_ENUM_OUT_OF_SYNC;
if (This->receive_pincount(This->base) >= This->uIndex + cPins)
return S_FALSE;
This->uIndex += cPins;
return S_OK;
}
static HRESULT WINAPI IEnumPinsImpl_Next(IEnumPins * iface, ULONG cPins, IPin ** ppPins, ULONG * pcFetched)
{
IEnumPinsImpl *This = impl_from_IEnumPins(iface);
HRESULT hr = S_OK;
ULONG i = 0;
TRACE("(%p)->(%u, %p, %p)\n", iface, cPins, ppPins, pcFetched);
if (!ppPins)
return E_POINTER;
if (cPins > 1 && !pcFetched)
return E_INVALIDARG;
if (pcFetched)
*pcFetched = 0;
if (This->Version != This->receive_version(This->base))
return VFW_E_ENUM_OUT_OF_SYNC;
while (i < cPins && hr == S_OK)
{
IPin *pin;
pin = This->receive_pin(This->base, This->uIndex + i);
if (!pin)
break;
else
ppPins[i] = pin;
++i;
}
if (pcFetched)
*pcFetched = i;
This->uIndex += i;
if (i < cPins)
return S_FALSE;
return S_OK;
}