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(
  31     LPPARSEDISPLAYNAME iface,
  32     REFIID riid,
  33     LPVOID *ppvObj)
  34 {
  35     TRACE("\n\tIID:\t%s\n",debugstr_guid(riid));
  36
  37     if (ppvObj == NULL) return E_POINTER;
  38
  39     if (IsEqualGUID(riid, &IID_IUnknown) ||
  40         IsEqualGUID(riid, &IID_IParseDisplayName))
  41     {
  42         *ppvObj = iface;
  43         IParseDisplayName_AddRef(iface);
  44         return S_OK;
  45     }
  46
  47     FIXME("- no interface IID: %s\n", debugstr_guid(riid));
  48     return E_NOINTERFACE;
  49 }
  50
  51 /**********************************************************************
  52  * DEVENUM_IParseDisplayName_AddRef (also IUnknown)
  53  */
  54 static ULONG WINAPI DEVENUM_IParseDisplayName_AddRef(LPPARSEDISPLAYNAME iface)
  55 {
  56     TRACE("\n");
  57
  58     DEVENUM_LockModule();
  59
  60     return 2; /* non-heap based object */
  61 }
  62
  63 /**********************************************************************
  64  * DEVENUM_IParseDisplayName_Release (also IUnknown)
  65  */
  66 static ULONG WINAPI DEVENUM_IParseDisplayName_Release(LPPARSEDISPLAYNAME iface)
  67 {
  68     TRACE("\n");
  69
  70     DEVENUM_UnlockModule();
  71
  72     return 1; /* non-heap based object */
  73 }
  74
  75 /**********************************************************************
  76  * DEVENUM_IParseDisplayName_ParseDisplayName
  77  *
  78  *  Creates a moniker referenced to by the display string argument
  79  *
  80  * POSSIBLE BUGS:
  81  *  Might not handle more complicated strings properly (ie anything
  82  *  not in "@device:sw:{CLSID1}\<filter name or CLSID>" format
  83  */
  84 static HRESULT WINAPI DEVENUM_IParseDisplayName_ParseDisplayName(
  85     LPPARSEDISPLAYNAME iface,
  86     IBindCtx *pbc,
  87     LPOLESTR pszDisplayName,
  88     ULONG *pchEaten,
  89     IMoniker **ppmkOut)
  90 {
  91     LPOLESTR pszBetween = NULL;
  92     LPOLESTR pszClass = NULL;
  93     MediaCatMoniker * pMoniker = NULL;
  94     CLSID clsidDevice;
  95     HRESULT res = S_OK;
  96     WCHAR wszRegKeyName[MAX_PATH];
  97     HKEY hbasekey;
  98     int classlen;
  99     static const WCHAR wszRegSeparator[] =   {'\\', 0 };
 100
 101     TRACE("(%p, %s, %p, %p)\n", pbc, debugstr_w(pszDisplayName), pchEaten, ppmkOut);
 102
 103     *ppmkOut = NULL;
 104     if (pchEaten)
 105         *pchEaten = strlenW(pszDisplayName);
 106
 107     pszDisplayName = strchrW(pszDisplayName, '{');
 108     pszBetween = strchrW(pszDisplayName, '}') + 2;
 109
 110     /* size = pszBetween - pszDisplayName - 1 (for '\\' after CLSID)
 111      * + 1 (for NULL character)
 112      */
 113     classlen = (int)(pszBetween - pszDisplayName - 1);
 114     pszClass = CoTaskMemAlloc((classlen + 1) * sizeof(WCHAR));
 115     if (!pszClass)
 116         return E_OUTOFMEMORY;
 117
 118     memcpy(pszClass, pszDisplayName, classlen * sizeof(WCHAR));
 119     pszClass[classlen] = 0;
 120
 121     TRACE("Device CLSID: %s\n", debugstr_w(pszClass));
 122
 123     res = CLSIDFromString(pszClass, &clsidDevice);
 124
 125     if (SUCCEEDED(res))
 126     {
 127         res = DEVENUM_GetCategoryKey(&clsidDevice, &hbasekey, wszRegKeyName, MAX_PATH);
 128     }
 129
 130     if (SUCCEEDED(res))
 131     {
 132         pMoniker = DEVENUM_IMediaCatMoniker_Construct();
 133         if (pMoniker)
 134         {
 135             strcatW(wszRegKeyName, wszRegSeparator);
 136             strcatW(wszRegKeyName, pszBetween);
 137
 138             if (RegCreateKeyW(hbasekey, wszRegKeyName, &pMoniker->hkey) == ERROR_SUCCESS)
 139                 *ppmkOut = (LPMONIKER)pMoniker;
 140             else
 141             {
 142                 IMoniker_Release((LPMONIKER)pMoniker);
 143                 res = MK_E_NOOBJECT;
 144             }
 145         }
 146     }
 147
 148     CoTaskMemFree(pszClass);
 149
 150     TRACE("-- returning: %x\n", res);
 151     return res;
 152 }
 153
 154 /**********************************************************************
 155  * IParseDisplayName_Vtbl
 156  */
 157 static const IParseDisplayNameVtbl IParseDisplayName_Vtbl =
 158 {
 159     DEVENUM_IParseDisplayName_QueryInterface,
 160     DEVENUM_IParseDisplayName_AddRef,
 161     DEVENUM_IParseDisplayName_Release,
 162     DEVENUM_IParseDisplayName_ParseDisplayName
 163 };
 164
 165 /* The one instance of this class */
 166 ParseDisplayNameImpl DEVENUM_ParseDisplayName = { &IParseDisplayName_Vtbl };