1 /*
2  *	IParseDisplayName implementation for DEVENUM.dll
3  *
4  * Copyright (C) 2002 Robert Shearman
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19  *
20  * NOTES ON THIS FILE:
21  * - Implements IParseDisplayName interface which creates a moniker
22  *   from a string in a special format
23  */
24 #include "devenum_private.h"
25 
26 #include "wine/debug.h"
27 
28 WINE_DEFAULT_DEBUG_CHANNEL(devenum);
29 
30 static HRESULT WINAPI DEVENUM_IParseDisplayName_QueryInterface(IParseDisplayName *iface,
31         REFIID riid, void **ppv)
32 {
33     TRACE("\n\tIID:\t%s\n",debugstr_guid(riid));
34 
35     if (!ppv)
36         return E_POINTER;
37 
38     if (IsEqualGUID(riid, &IID_IUnknown) ||
39         IsEqualGUID(riid, &IID_IParseDisplayName))
40     {
41         *ppv = iface;
42         IParseDisplayName_AddRef(iface);
43         return S_OK;
44     }
45 
46     FIXME("- no interface IID: %s\n", debugstr_guid(riid));
47     *ppv = NULL;
48     return E_NOINTERFACE;
49 }
50 
51 static ULONG WINAPI DEVENUM_IParseDisplayName_AddRef(IParseDisplayName *iface)
52 {
53     TRACE("\n");
54 
55     DEVENUM_LockModule();
56 
57     return 2; /* non-heap based object */
58 }
59 
60 static ULONG WINAPI DEVENUM_IParseDisplayName_Release(IParseDisplayName *iface)
61 {
62     TRACE("\n");
63 
64     DEVENUM_UnlockModule();
65 
66     return 1; /* non-heap based object */
67 }
68 
69 /**********************************************************************
70  * DEVENUM_IParseDisplayName_ParseDisplayName
71  *
72  *  Creates a moniker referenced to by the display string argument
73  *
74  * POSSIBLE BUGS:
75  *  Might not handle more complicated strings properly (ie anything
76  *  not in "@device:sw:{CLSID1}\<filter name or CLSID>" format
77  */
78 static HRESULT WINAPI DEVENUM_IParseDisplayName_ParseDisplayName(IParseDisplayName *iface,
79         IBindCtx *pbc, LPOLESTR pszDisplayName, ULONG *pchEaten, IMoniker **ppmkOut)
80 {
81     LPOLESTR pszBetween = NULL;
82     LPOLESTR pszClass = NULL;
83     MediaCatMoniker * pMoniker = NULL;
84     CLSID clsidDevice;
85     HRESULT res = S_OK;
86     WCHAR wszRegKeyName[MAX_PATH];
87     HKEY hbasekey;
88     int classlen;
89     static const WCHAR wszRegSeparator[] =   {'\\', 0 };
90 
91     TRACE("(%p, %s, %p, %p)\n", pbc, debugstr_w(pszDisplayName), pchEaten, ppmkOut);
92 
93     *ppmkOut = NULL;
94     if (pchEaten)
95         *pchEaten = strlenW(pszDisplayName);
96 
97     pszDisplayName = strchrW(pszDisplayName, '{');
98     pszBetween = strchrW(pszDisplayName, '}') + 2;
99 
100     /* size = pszBetween - pszDisplayName - 1 (for '\\' after CLSID)
101      * + 1 (for NULL character)
102      */
103     classlen = (int)(pszBetween - pszDisplayName - 1);
104     pszClass = CoTaskMemAlloc((classlen + 1) * sizeof(WCHAR));
105     if (!pszClass)
106         return E_OUTOFMEMORY;
107 
108     memcpy(pszClass, pszDisplayName, classlen * sizeof(WCHAR));
109     pszClass[classlen] = 0;
110 
111     TRACE("Device CLSID: %s\n", debugstr_w(pszClass));
112 
113     res = CLSIDFromString(pszClass, &clsidDevice);
114 
115     if (SUCCEEDED(res))
116     {
117         res = DEVENUM_GetCategoryKey(&clsidDevice, &hbasekey, wszRegKeyName, MAX_PATH);
118     }
119 
120     if (SUCCEEDED(res))
121     {
122         pMoniker = DEVENUM_IMediaCatMoniker_Construct();
123         if (pMoniker)
124         {
125             strcatW(wszRegKeyName, wszRegSeparator);
126             strcatW(wszRegKeyName, pszBetween);
127 
128             if (RegCreateKeyW(hbasekey, wszRegKeyName, &pMoniker->hkey) == ERROR_SUCCESS)
129                 *ppmkOut = &pMoniker->IMoniker_iface;
130             else
131             {
132                 IMoniker_Release(&pMoniker->IMoniker_iface);
133                 res = MK_E_NOOBJECT;
134             }
135         }
136     }
137 
138     CoTaskMemFree(pszClass);
139 
140     TRACE("-- returning: %x\n", res);
141     return res;
142 }
143 
144 /**********************************************************************
145  * IParseDisplayName_Vtbl
146  */
147 static const IParseDisplayNameVtbl IParseDisplayName_Vtbl =
148 {
149     DEVENUM_IParseDisplayName_QueryInterface,
150     DEVENUM_IParseDisplayName_AddRef,
151     DEVENUM_IParseDisplayName_Release,
152     DEVENUM_IParseDisplayName_ParseDisplayName
153 };
154 
155 /* The one instance of this class */
156 IParseDisplayName DEVENUM_ParseDisplayName = { &IParseDisplayName_Vtbl };
157