reactos/lib/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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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 = (LPVOID)iface;
  43         IParseDisplayName_AddRef(iface);
  44         return S_OK;
  45     }
  46
  47     FIXME("- no interface\n\tIID:\t%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     IEnumMoniker * pEm = NULL;
  94     MediaCatMoniker * pMoniker = NULL;
  95     CLSID clsidDevice;
  96     HRESULT res = S_OK;
  97
  98     TRACE("(%p, %s, %p, %p)\n", pbc, debugstr_w(pszDisplayName), pchEaten, ppmkOut);
  99
 100     *ppmkOut = NULL;
 101     if (pchEaten)
 102         *pchEaten = strlenW(pszDisplayName);
 103
 104     pszDisplayName = strchrW(pszDisplayName, '{');
 105     pszBetween = strchrW(pszDisplayName, '}') + 2;
 106
 107     /* size = pszBetween - pszDisplayName - 1 (for '\\' after CLSID)
 108      * + 1 (for NULL character)
 109      */
 110     pszClass = CoTaskMemAlloc((int)(pszBetween - pszDisplayName) * sizeof(WCHAR));
 111     if (!pszClass)
 112         return E_OUTOFMEMORY;
 113
 114     strncpyW(pszClass, pszDisplayName, (int)(pszBetween - pszDisplayName) - 1);
 115     pszClass[(int)(pszBetween - pszDisplayName) - 1] = 0;
 116
 117     TRACE("Device CLSID: %s\n", debugstr_w(pszClass));
 118
 119     res = CLSIDFromString(pszClass, &clsidDevice);
 120
 121     if (SUCCEEDED(res))
 122     {
 123         res = DEVENUM_ICreateDevEnum_CreateClassEnumerator((ICreateDevEnum *)(char*)&DEVENUM_CreateDevEnum, &clsidDevice, &pEm, 0);
 124         if (res == S_FALSE) /* S_FALSE means no category */
 125             res = MK_E_NOOBJECT;
 126     }
 127
 128     if (SUCCEEDED(res))
 129     {
 130         pMoniker = DEVENUM_IMediaCatMoniker_Construct();
 131         if (pMoniker)
 132         {
 133             if (RegCreateKeyW(((EnumMonikerImpl *)pEm)->hkey,
 134                                pszBetween,
 135                                &pMoniker->hkey) == ERROR_SUCCESS)
 136                 *ppmkOut = (LPMONIKER)pMoniker;
 137             else
 138             {
 139                 IMoniker_Release((LPMONIKER)pMoniker);
 140                 res = MK_E_NOOBJECT;
 141             }
 142         }
 143     }
 144
 145     if (pEm)
 146         IEnumMoniker_Release(pEm);
 147
 148     if (pszClass)
 149         CoTaskMemFree(pszClass);
 150
 151     TRACE("-- returning: %lx\n", res);
 152     return res;
 153 }
 154
 155 /**********************************************************************
 156  * IParseDisplayName_Vtbl
 157  */
 158 static IParseDisplayNameVtbl IParseDisplayName_Vtbl =
 159 {
 160     DEVENUM_IParseDisplayName_QueryInterface,
 161     DEVENUM_IParseDisplayName_AddRef,
 162     DEVENUM_IParseDisplayName_Release,
 163     DEVENUM_IParseDisplayName_ParseDisplayName
 164 };
 165
 166 /* The one instance of this class */
 167 ParseDisplayNameImpl DEVENUM_ParseDisplayName = { &IParseDisplayName_Vtbl };