Sweden-Number/dlls/devenum/parsedisplayname.c

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/*
* IParseDisplayName implementation for DEVENUM.dll
*
* Copyright (C) 2002 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
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*
* NOTES ON THIS FILE:
* - Implements IParseDisplayName interface which creates a moniker
* from a string in a special format
*/
#include "devenum_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(devenum);
static HRESULT WINAPI DEVENUM_IParseDisplayName_QueryInterface(IParseDisplayName *iface,
REFIID riid, void **ppv)
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{
TRACE("\n\tIID:\t%s\n",debugstr_guid(riid));
if (!ppv)
return E_POINTER;
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if (IsEqualGUID(riid, &IID_IUnknown) ||
IsEqualGUID(riid, &IID_IParseDisplayName))
{
*ppv = iface;
IParseDisplayName_AddRef(iface);
return S_OK;
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}
FIXME("- no interface IID: %s\n", debugstr_guid(riid));
*ppv = NULL;
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return E_NOINTERFACE;
}
static ULONG WINAPI DEVENUM_IParseDisplayName_AddRef(IParseDisplayName *iface)
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{
TRACE("\n");
DEVENUM_LockModule();
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return 2; /* non-heap based object */
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}
static ULONG WINAPI DEVENUM_IParseDisplayName_Release(IParseDisplayName *iface)
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{
TRACE("\n");
DEVENUM_UnlockModule();
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return 1; /* non-heap based object */
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}
/**********************************************************************
* DEVENUM_IParseDisplayName_ParseDisplayName
*
* Creates a moniker referenced to by the display string argument
*
* POSSIBLE BUGS:
* Might not handle more complicated strings properly (ie anything
* not in "@device:sw:{CLSID1}\<filter name or CLSID>" format
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*/
static HRESULT WINAPI DEVENUM_IParseDisplayName_ParseDisplayName(IParseDisplayName *iface,
IBindCtx *pbc, LPOLESTR name, ULONG *eaten, IMoniker **ret)
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{
WCHAR buffer[MAX_PATH];
enum device_type type;
MediaCatMoniker *mon;
CLSID class;
TRACE("(%p, %s, %p, %p)\n", pbc, debugstr_w(name), eaten, ret);
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*ret = NULL;
if (eaten)
*eaten = lstrlenW(name);
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name = wcschr(name, ':') + 1;
if (!wcsncmp(name, swW, 3))
{
type = DEVICE_FILTER;
name += 3;
}
else if (!wcsncmp(name, cmW, 3))
{
type = DEVICE_CODEC;
name += 3;
}
else if (!wcsncmp(name, dmoW, 4))
{
type = DEVICE_DMO;
name += 4;
}
else
{
FIXME("unhandled device type %s\n", debugstr_w(name));
return MK_E_SYNTAX;
}
if (!(mon = DEVENUM_IMediaCatMoniker_Construct()))
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return E_OUTOFMEMORY;
if (type == DEVICE_DMO)
{
lstrcpynW(buffer, name, CHARS_IN_GUID);
if (FAILED(CLSIDFromString(buffer, &mon->clsid)))
{
IMoniker_Release(&mon->IMoniker_iface);
return MK_E_SYNTAX;
}
lstrcpynW(buffer, name + CHARS_IN_GUID - 1, CHARS_IN_GUID);
if (FAILED(CLSIDFromString(buffer, &mon->class)))
{
IMoniker_Release(&mon->IMoniker_iface);
return MK_E_SYNTAX;
}
}
else
{
lstrcpynW(buffer, name, CHARS_IN_GUID);
if (CLSIDFromString(buffer, &class) == S_OK)
{
mon->has_class = TRUE;
mon->class = class;
name += CHARS_IN_GUID;
}
if (!(mon->name = CoTaskMemAlloc((lstrlenW(name) + 1) * sizeof(WCHAR))))
{
IMoniker_Release(&mon->IMoniker_iface);
return E_OUTOFMEMORY;
}
lstrcpyW(mon->name, name);
}
mon->type = type;
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*ret = &mon->IMoniker_iface;
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return S_OK;
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}
/**********************************************************************
* IParseDisplayName_Vtbl
*/
static const IParseDisplayNameVtbl IParseDisplayName_Vtbl =
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{
DEVENUM_IParseDisplayName_QueryInterface,
DEVENUM_IParseDisplayName_AddRef,
DEVENUM_IParseDisplayName_Release,
DEVENUM_IParseDisplayName_ParseDisplayName
};
/* The one instance of this class */
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IParseDisplayName DEVENUM_ParseDisplayName = { &IParseDisplayName_Vtbl };