Sweden-Number/dlls/quartz/enumunk.c

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/*
* Implementation of IEnumUnknown (for internal use).
*
* hidenori@a2.ctktv.ne.jp
*/
#include "config.h"
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "wine/obj_base.h"
#include "wine/obj_misc.h"
#include "debugtools.h"
DEFAULT_DEBUG_CHANNEL(quartz);
#include "quartz_private.h"
#include "enumunk.h"
#include "iunk.h"
typedef struct IEnumUnknownImpl
{
ICOM_VFIELD(IEnumUnknown);
} IEnumUnknownImpl;
typedef struct
{
QUARTZ_IUnkImpl unk;
IEnumUnknownImpl enumunk;
struct QUARTZ_IFEntry IFEntries[1];
QUARTZ_CompList* pCompList;
QUARTZ_CompListItem* pItemCur;
} CEnumUnknown;
#define CEnumUnknown_THIS(iface,member) CEnumUnknown* This = ((CEnumUnknown*)(((char*)iface)-offsetof(CEnumUnknown,member)))
static HRESULT WINAPI
IEnumUnknown_fnQueryInterface(IEnumUnknown* iface,REFIID riid,void** ppobj)
{
CEnumUnknown_THIS(iface,enumunk);
TRACE("(%p)->()\n",This);
return IUnknown_QueryInterface(This->unk.punkControl,riid,ppobj);
}
static ULONG WINAPI
IEnumUnknown_fnAddRef(IEnumUnknown* iface)
{
CEnumUnknown_THIS(iface,enumunk);
TRACE("(%p)->()\n",This);
return IUnknown_AddRef(This->unk.punkControl);
}
static ULONG WINAPI
IEnumUnknown_fnRelease(IEnumUnknown* iface)
{
CEnumUnknown_THIS(iface,enumunk);
TRACE("(%p)->()\n",This);
return IUnknown_Release(This->unk.punkControl);
}
static HRESULT WINAPI
IEnumUnknown_fnNext(IEnumUnknown* iface,ULONG cReq,IUnknown** ppunk,ULONG* pcFetched)
{
CEnumUnknown_THIS(iface,enumunk);
HRESULT hr;
ULONG cFetched;
TRACE("(%p)->(%lu,%p,%p)\n",This,cReq,ppunk,pcFetched);
if ( pcFetched == NULL && cReq > 1 )
return E_INVALIDARG;
if ( ppunk == NULL )
return E_POINTER;
QUARTZ_CompList_Lock( This->pCompList );
hr = NOERROR;
cFetched = 0;
while ( cReq > 0 )
{
if ( This->pItemCur == NULL )
{
hr = S_FALSE;
break;
}
ppunk[ cFetched ++ ] = QUARTZ_CompList_GetItemPtr( This->pItemCur );
IUnknown_AddRef( *ppunk );
This->pItemCur =
QUARTZ_CompList_GetNext( This->pCompList, This->pItemCur );
cReq --;
}
QUARTZ_CompList_Unlock( This->pCompList );
if ( pcFetched != NULL )
*pcFetched = cFetched;
return hr;
}
static HRESULT WINAPI
IEnumUnknown_fnSkip(IEnumUnknown* iface,ULONG cSkip)
{
CEnumUnknown_THIS(iface,enumunk);
HRESULT hr;
TRACE("(%p)->()\n",This);
QUARTZ_CompList_Lock( This->pCompList );
hr = NOERROR;
while ( cSkip > 0 )
{
if ( This->pItemCur == NULL )
{
hr = S_FALSE;
break;
}
This->pItemCur =
QUARTZ_CompList_GetNext( This->pCompList, This->pItemCur );
cSkip --;
}
QUARTZ_CompList_Unlock( This->pCompList );
return hr;
}
static HRESULT WINAPI
IEnumUnknown_fnReset(IEnumUnknown* iface)
{
CEnumUnknown_THIS(iface,enumunk);
TRACE("(%p)->()\n",This);
QUARTZ_CompList_Lock( This->pCompList );
This->pItemCur = QUARTZ_CompList_GetFirst( This->pCompList );
QUARTZ_CompList_Unlock( This->pCompList );
return NOERROR;
}
static HRESULT WINAPI
IEnumUnknown_fnClone(IEnumUnknown* iface,IEnumUnknown** ppunk)
{
CEnumUnknown_THIS(iface,enumunk);
HRESULT hr;
TRACE("(%p)->()\n",This);
if ( ppunk == NULL )
return E_POINTER;
QUARTZ_CompList_Lock( This->pCompList );
hr = QUARTZ_CreateEnumUnknown(
This->IFEntries[0].piid,
(void**)ppunk,
This->pCompList );
FIXME( "current pointer must be seeked correctly\n" );
QUARTZ_CompList_Unlock( This->pCompList );
return hr;
}
static ICOM_VTABLE(IEnumUnknown) ienumunk =
{
ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
/* IUnknown fields */
IEnumUnknown_fnQueryInterface,
IEnumUnknown_fnAddRef,
IEnumUnknown_fnRelease,
/* IEnumUnknown fields */
IEnumUnknown_fnNext,
IEnumUnknown_fnSkip,
IEnumUnknown_fnReset,
IEnumUnknown_fnClone,
};
void QUARTZ_DestroyEnumUnknown(IUnknown* punk)
{
CEnumUnknown_THIS(punk,unk);
if ( This->pCompList != NULL )
QUARTZ_CompList_Free( This->pCompList );
}
HRESULT QUARTZ_CreateEnumUnknown(
REFIID riidEnum, void** ppobj, const QUARTZ_CompList* pCompList )
{
CEnumUnknown* penum;
QUARTZ_CompList* pCompListDup;
TRACE("(%s,%p,%p)\n",debugstr_guid(riidEnum),ppobj,pCompList);
pCompListDup = QUARTZ_CompList_Dup( pCompList, FALSE );
if ( pCompListDup == NULL )
return E_OUTOFMEMORY;
penum = (CEnumUnknown*)QUARTZ_AllocObj( sizeof(CEnumUnknown) );
if ( penum == NULL )
{
QUARTZ_CompList_Free( pCompListDup );
return E_OUTOFMEMORY;
}
QUARTZ_IUnkInit( &penum->unk, NULL );
ICOM_VTBL(&penum->enumunk) = &ienumunk;
penum->IFEntries[0].piid = riidEnum;
penum->IFEntries[0].ofsVTPtr =
offsetof(CEnumUnknown,enumunk)-offsetof(CEnumUnknown,unk);
penum->pCompList = pCompListDup;
penum->pItemCur = QUARTZ_CompList_GetFirst( pCompListDup );
penum->unk.pEntries = penum->IFEntries;
penum->unk.dwEntries = 1;
penum->unk.pOnFinalRelease = QUARTZ_DestroyEnumUnknown;
*ppobj = (void*)(&penum->enumunk);
return S_OK;
}