dlls/devenum/parsedisplayname.c

   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 };