reactos/dll/win32/urlmon/format.c

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/*
* Copyright 2005 Jacek Caban
*
* 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 "urlmon_main.h"
static WCHAR wszEnumFORMATETC[] = {'_','E','n','u','m','F','O','R','M','A','T','E','T','C','_',0};
typedef struct {
IEnumFORMATETC IEnumFORMATETC_iface;
FORMATETC *fetc;
UINT fetc_cnt;
UINT it;
LONG ref;
} EnumFORMATETC;
static inline EnumFORMATETC *impl_from_IEnumFORMATETC(IEnumFORMATETC *iface)
{
return CONTAINING_RECORD(iface, EnumFORMATETC, IEnumFORMATETC_iface);
}
static IEnumFORMATETC *EnumFORMATETC_Create(UINT cfmtetc, const FORMATETC *rgfmtetc, UINT it);
static HRESULT WINAPI EnumFORMATETC_QueryInterface(IEnumFORMATETC *iface, REFIID riid, void **ppv)
{
EnumFORMATETC *This = impl_from_IEnumFORMATETC(iface);
TRACE("(%p)->(%s %p)\n", This, debugstr_guid(riid), ppv);
*ppv = NULL;
if(IsEqualGUID(&IID_IUnknown, riid) || IsEqualGUID(&IID_IEnumFORMATETC, riid)) {
IEnumFORMATETC_AddRef(iface);
*ppv = iface;
return S_OK;
}
WARN("not supported interface %s\n", debugstr_guid(riid));
return E_NOINTERFACE;
}
static ULONG WINAPI EnumFORMATETC_AddRef(IEnumFORMATETC *iface)
{
EnumFORMATETC *This = impl_from_IEnumFORMATETC(iface);
LONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) ref=%d\n", This, ref);
return ref;
}
static ULONG WINAPI EnumFORMATETC_Release(IEnumFORMATETC *iface)
{
EnumFORMATETC *This = impl_from_IEnumFORMATETC(iface);
LONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) ref=%d\n", This, ref);
if(!ref) {
heap_free(This->fetc);
heap_free(This);
URLMON_UnlockModule();
}
return ref;
}
static HRESULT WINAPI EnumFORMATETC_Next(IEnumFORMATETC *iface, ULONG celt,
FORMATETC *rgelt, ULONG *pceltFetched)
{
EnumFORMATETC *This = impl_from_IEnumFORMATETC(iface);
ULONG cnt;
TRACE("(%p)->(%d %p %p)\n", This, celt, rgelt, pceltFetched);
if(!rgelt)
return E_INVALIDARG;
if(This->it >= This->fetc_cnt || !celt) {
if(pceltFetched)
*pceltFetched = 0;
return celt ? S_FALSE : S_OK;
}
cnt = This->fetc_cnt-This->it > celt ? celt : This->fetc_cnt-This->it;
memcpy(rgelt, This->fetc+This->it, cnt*sizeof(FORMATETC));
This->it += cnt;
if(pceltFetched)
*pceltFetched = cnt;
return cnt == celt ? S_OK : S_FALSE;
}
static HRESULT WINAPI EnumFORMATETC_Skip(IEnumFORMATETC *iface, ULONG celt)
{
EnumFORMATETC *This = impl_from_IEnumFORMATETC(iface);
TRACE("(%p)->(%d)\n", This, celt);
This->it += celt;
return This->it > This->fetc_cnt ? S_FALSE : S_OK;
}
static HRESULT WINAPI EnumFORMATETC_Reset(IEnumFORMATETC *iface)
{
EnumFORMATETC *This = impl_from_IEnumFORMATETC(iface);
TRACE("(%p)\n", This);
This->it = 0;
return S_OK;
}
static HRESULT WINAPI EnumFORMATETC_Clone(IEnumFORMATETC *iface, IEnumFORMATETC **ppenum)
{
EnumFORMATETC *This = impl_from_IEnumFORMATETC(iface);
TRACE("(%p)->(%p)\n", This, ppenum);
if(!ppenum)
return E_INVALIDARG;
*ppenum = EnumFORMATETC_Create(This->fetc_cnt, This->fetc, This->it);
return S_OK;
}
static const IEnumFORMATETCVtbl EnumFORMATETCVtbl = {
EnumFORMATETC_QueryInterface,
EnumFORMATETC_AddRef,
EnumFORMATETC_Release,
EnumFORMATETC_Next,
EnumFORMATETC_Skip,
EnumFORMATETC_Reset,
EnumFORMATETC_Clone
};
static IEnumFORMATETC *EnumFORMATETC_Create(UINT cfmtetc, const FORMATETC *rgfmtetc, UINT it)
{
EnumFORMATETC *ret = heap_alloc(sizeof(EnumFORMATETC));
URLMON_LockModule();
ret->IEnumFORMATETC_iface.lpVtbl = &EnumFORMATETCVtbl;
ret->ref = 1;
ret->it = it;
ret->fetc_cnt = cfmtetc;
ret->fetc = heap_alloc(cfmtetc*sizeof(FORMATETC));
memcpy(ret->fetc, rgfmtetc, cfmtetc*sizeof(FORMATETC));
return &ret->IEnumFORMATETC_iface;
}
/**********************************************************
* CreateFormatEnumerator (urlmon.@)
*/
HRESULT WINAPI CreateFormatEnumerator(UINT cfmtetc, FORMATETC *rgfmtetc,
IEnumFORMATETC** ppenumfmtetc)
{
TRACE("(%d %p %p)\n", cfmtetc, rgfmtetc, ppenumfmtetc);
if(!ppenumfmtetc)
return E_INVALIDARG;
if(!cfmtetc)
return E_FAIL;
*ppenumfmtetc = EnumFORMATETC_Create(cfmtetc, rgfmtetc, 0);
return S_OK;
}
/**********************************************************
* RegisterFormatEnumerator (urlmon.@)
*/
HRESULT WINAPI RegisterFormatEnumerator(LPBC pBC, IEnumFORMATETC *pEFetc, DWORD reserved)
{
TRACE("(%p %p %d)\n", pBC, pEFetc, reserved);
if(reserved)
WARN("reserved != 0\n");
if(!pBC || !pEFetc)
return E_INVALIDARG;
return IBindCtx_RegisterObjectParam(pBC, wszEnumFORMATETC, (IUnknown*)pEFetc);
}
/**********************************************************
* RevokeFormatEnumerator (urlmon.@)
*/
HRESULT WINAPI RevokeFormatEnumerator(LPBC pbc, IEnumFORMATETC *pEFetc)
{
TRACE("(%p %p)\n", pbc, pEFetc);
if(!pbc)
return E_INVALIDARG;
return IBindCtx_RevokeObjectParam(pbc, wszEnumFORMATETC);
}