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 name, ULONG *eaten, IMoniker **ret)
80 {
81     WCHAR buffer[MAX_PATH];
82     enum device_type type;
83     MediaCatMoniker *mon;
84     CLSID class;
85 
86     TRACE("(%p, %s, %p, %p)\n", pbc, debugstr_w(name), eaten, ret);
87 
88     *ret = NULL;
89     if (eaten)
90         *eaten = lstrlenW(name);
91 
92     name = wcschr(name, ':') + 1;
93 
94     if (!wcsncmp(name, swW, 3))
95     {
96         type = DEVICE_FILTER;
97         name += 3;
98     }
99     else if (!wcsncmp(name, cmW, 3))
100     {
101         type = DEVICE_CODEC;
102         name += 3;
103     }
104     else if (!wcsncmp(name, dmoW, 4))
105     {
106         type = DEVICE_DMO;
107         name += 4;
108     }
109     else
110     {
111         FIXME("unhandled device type %s\n", debugstr_w(name));
112         return MK_E_SYNTAX;
113     }
114 
115     if (!(mon = DEVENUM_IMediaCatMoniker_Construct()))
116         return E_OUTOFMEMORY;
117 
118     if (type == DEVICE_DMO)
119     {
120         lstrcpynW(buffer, name, CHARS_IN_GUID);
121         if (FAILED(CLSIDFromString(buffer, &mon->clsid)))
122         {
123             IMoniker_Release(&mon->IMoniker_iface);
124             return MK_E_SYNTAX;
125         }
126 
127         lstrcpynW(buffer, name + CHARS_IN_GUID - 1, CHARS_IN_GUID);
128         if (FAILED(CLSIDFromString(buffer, &mon->class)))
129         {
130             IMoniker_Release(&mon->IMoniker_iface);
131             return MK_E_SYNTAX;
132         }
133     }
134     else
135     {
136         lstrcpynW(buffer, name, CHARS_IN_GUID);
137         if (CLSIDFromString(buffer, &class) == S_OK)
138         {
139             mon->has_class = TRUE;
140             mon->class = class;
141             name += CHARS_IN_GUID;
142         }
143 
144         if (!(mon->name = CoTaskMemAlloc((lstrlenW(name) + 1) * sizeof(WCHAR))))
145         {
146             IMoniker_Release(&mon->IMoniker_iface);
147             return E_OUTOFMEMORY;
148         }
149         lstrcpyW(mon->name, name);
150     }
151 
152     mon->type = type;
153 
154     *ret = &mon->IMoniker_iface;
155 
156     return S_OK;
157 }
158 
159 /**********************************************************************
160  * IParseDisplayName_Vtbl
161  */
162 static const IParseDisplayNameVtbl IParseDisplayName_Vtbl =
163 {
164     DEVENUM_IParseDisplayName_QueryInterface,
165     DEVENUM_IParseDisplayName_AddRef,
166     DEVENUM_IParseDisplayName_Release,
167     DEVENUM_IParseDisplayName_ParseDisplayName
168 };
169 
170 /* The one instance of this class */
171 IParseDisplayName DEVENUM_ParseDisplayName = { &IParseDisplayName_Vtbl };
172