Sweden-Number/dlls/quartz/enumpins.c

178 lines
4.5 KiB
C

/*
* Implementation of IEnumPins Interface
*
* Copyright 2003 Robert Shearman
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "quartz_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(quartz);
typedef struct IEnumPinsImpl
{
const IEnumPinsVtbl * lpVtbl;
LONG refCount;
ENUMPINDETAILS enumPinDetails;
ULONG uIndex;
} IEnumPinsImpl;
static const struct IEnumPinsVtbl IEnumPinsImpl_Vtbl;
HRESULT IEnumPinsImpl_Construct(const ENUMPINDETAILS * pDetails, IEnumPins ** ppEnum)
{
IEnumPinsImpl * pEnumPins = CoTaskMemAlloc(sizeof(IEnumPinsImpl));
if (!pEnumPins)
{
*ppEnum = NULL;
return E_OUTOFMEMORY;
}
pEnumPins->lpVtbl = &IEnumPinsImpl_Vtbl;
pEnumPins->refCount = 1;
pEnumPins->uIndex = 0;
pEnumPins->enumPinDetails = *pDetails;
*ppEnum = (IEnumPins *)(&pEnumPins->lpVtbl);
TRACE("Created new enumerator (%p)\n", *ppEnum);
return S_OK;
}
static HRESULT WINAPI IEnumPinsImpl_QueryInterface(IEnumPins * iface, REFIID riid, LPVOID * ppv)
{
TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
*ppv = NULL;
if (IsEqualIID(riid, &IID_IUnknown))
*ppv = (LPVOID)iface;
else if (IsEqualIID(riid, &IID_IEnumPins))
*ppv = (LPVOID)iface;
if (*ppv)
{
IUnknown_AddRef((IUnknown *)(*ppv));
return S_OK;
}
FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
return E_NOINTERFACE;
}
static ULONG WINAPI IEnumPinsImpl_AddRef(IEnumPins * iface)
{
IEnumPinsImpl *This = (IEnumPinsImpl *)iface;
ULONG refCount = InterlockedIncrement(&This->refCount);
TRACE("(%p)->() AddRef from %d\n", This, refCount - 1);
return refCount;
}
static ULONG WINAPI IEnumPinsImpl_Release(IEnumPins * iface)
{
IEnumPinsImpl *This = (IEnumPinsImpl *)iface;
ULONG refCount = InterlockedDecrement(&This->refCount);
TRACE("(%p)->() Release from %d\n", This, refCount + 1);
if (!refCount)
{
CoTaskMemFree(This);
return 0;
}
else
return refCount;
}
static HRESULT WINAPI IEnumPinsImpl_Next(IEnumPins * iface, ULONG cPins, IPin ** ppPins, ULONG * pcFetched)
{
ULONG cFetched;
IEnumPinsImpl *This = (IEnumPinsImpl *)iface;
cFetched = min(This->enumPinDetails.cPins, This->uIndex + cPins) - This->uIndex;
TRACE("(%u, %p, %p)\n", cPins, ppPins, pcFetched);
if (cFetched > 0)
{
ULONG i;
for (i = 0; i < cFetched; i++) {
IPin_AddRef(This->enumPinDetails.ppPins[This->uIndex + i]);
ppPins[i] = This->enumPinDetails.ppPins[This->uIndex + i];
}
}
if ((cPins != 1) || pcFetched)
*pcFetched = cFetched;
This->uIndex += cFetched;
if (cFetched != cPins)
return S_FALSE;
return S_OK;
}
static HRESULT WINAPI IEnumPinsImpl_Skip(IEnumPins * iface, ULONG cPins)
{
IEnumPinsImpl *This = (IEnumPinsImpl *)iface;
TRACE("(%u)\n", cPins);
if (This->uIndex + cPins < This->enumPinDetails.cPins)
{
This->uIndex += cPins;
return S_OK;
}
return S_FALSE;
}
static HRESULT WINAPI IEnumPinsImpl_Reset(IEnumPins * iface)
{
IEnumPinsImpl *This = (IEnumPinsImpl *)iface;
TRACE("IEnumPinsImpl::Reset()\n");
This->uIndex = 0;
return S_OK;
}
static HRESULT WINAPI IEnumPinsImpl_Clone(IEnumPins * iface, IEnumPins ** ppEnum)
{
HRESULT hr;
IEnumPinsImpl *This = (IEnumPinsImpl *)iface;
TRACE("(%p)\n", ppEnum);
hr = IEnumPinsImpl_Construct(&This->enumPinDetails, ppEnum);
if (FAILED(hr))
return hr;
return IEnumPins_Skip(*ppEnum, This->uIndex);
}
static const IEnumPinsVtbl IEnumPinsImpl_Vtbl =
{
IEnumPinsImpl_QueryInterface,
IEnumPinsImpl_AddRef,
IEnumPinsImpl_Release,
IEnumPinsImpl_Next,
IEnumPinsImpl_Skip,
IEnumPinsImpl_Reset,
IEnumPinsImpl_Clone
};