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., 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     ParseDisplayNameImpl *This = (ParseDisplayNameImpl *)iface;
  36     TRACE("\n\tIID:\t%s\n",debugstr_guid(riid));
  37
  38     if (This == NULL || ppvObj == NULL) return E_POINTER;
  39
  40     if (IsEqualGUID(riid, &IID_IUnknown) ||
  41         IsEqualGUID(riid, &IID_IParseDisplayName))
  42     {
  43         *ppvObj = (LPVOID)iface;
  44         IParseDisplayName_AddRef(iface);
  45         return S_OK;
  46     }
  47
  48     FIXME("- no interface\n\tIID:\t%s\n", debugstr_guid(riid));
  49     return E_NOINTERFACE;
  50 }
  51
  52 /**********************************************************************
  53  * DEVENUM_IParseDisplayName_AddRef (also IUnknown)
  54  */
  55 static ULONG WINAPI DEVENUM_IParseDisplayName_AddRef(LPPARSEDISPLAYNAME iface)
  56 {
  57     ParseDisplayNameImpl *This = (ParseDisplayNameImpl *)iface;
  58     TRACE("\n");
  59
  60     if (This == NULL) return E_POINTER;
  61
  62     if (InterlockedIncrement(&This->ref) == 1) {
  63         InterlockedIncrement(&dll_ref);
  64     }
  65
  66     return ++This->ref;
  67 }
  68
  69 /**********************************************************************
  70  * DEVENUM_IParseDisplayName_Release (also IUnknown)
  71  */
  72 static ULONG WINAPI DEVENUM_IParseDisplayName_Release(LPPARSEDISPLAYNAME iface)
  73 {
  74     ParseDisplayNameImpl *This = (ParseDisplayNameImpl *)iface;
  75     ULONG ref;
  76     TRACE("\n");
  77
  78     if (This == NULL) return E_POINTER;
  79
  80     ref = --This->ref;
  81     if (InterlockedDecrement(&This->ref) == 0) {
  82         InterlockedDecrement(&dll_ref);
  83     }
  84     return ref;
  85 }
  86
  87 /**********************************************************************
  88  * DEVENUM_IParseDisplayName_ParseDisplayName
  89  *
  90  *  Creates a moniker referenced to by the display string argument
  91  *
  92  * POSSIBLE BUGS:
  93  *  Might not handle more complicated strings properly (ie anything
  94  *  not in "@device:sw:{CLSID1}\<filter name or CLSID>" format
  95  */
  96 static HRESULT WINAPI DEVENUM_IParseDisplayName_ParseDisplayName(
  97     LPPARSEDISPLAYNAME iface,
  98     IBindCtx *pbc,
  99     LPOLESTR pszDisplayName,
 100     ULONG *pchEaten,
 101     IMoniker **ppmkOut)
 102 {
 103     LPOLESTR pszBetween = NULL;
 104     LPOLESTR pszClass = NULL;
 105     IEnumMoniker * pEm = NULL;
 106     MediaCatMoniker * pMoniker = NULL;
 107     CLSID clsidDevice;
 108     HRESULT res = S_OK;
 109
 110     TRACE("(%p, %s, %p, %p)\n", pbc, debugstr_w(pszDisplayName), pchEaten, ppmkOut);
 111
 112     *ppmkOut = NULL;
 113     if (pchEaten)
 114         *pchEaten = strlenW(pszDisplayName);
 115
 116     pszDisplayName = strchrW(pszDisplayName, '{');
 117     pszBetween = strchrW(pszDisplayName, '}') + 2;
 118
 119     /* size = pszBetween - pszDisplayName - 1 (for '\\' after CLSID)
 120      * + 1 (for NULL character)
 121      */
 122     pszClass = CoTaskMemAlloc((int)(pszBetween - pszDisplayName) * sizeof(WCHAR));
 123     if (!pszClass)
 124         return E_OUTOFMEMORY;
 125
 126     strncpyW(pszClass, pszDisplayName, (int)(pszBetween - pszDisplayName) - 1);
 127     pszClass[(int)(pszBetween - pszDisplayName) - 1] = 0;
 128
 129     TRACE("Device CLSID: %s\n", debugstr_w(pszClass));
 130
 131     res = CLSIDFromString(pszClass, &clsidDevice);
 132
 133     if (SUCCEEDED(res))
 134     {
 135         res = DEVENUM_ICreateDevEnum_CreateClassEnumerator((ICreateDevEnum *)(char*)&DEVENUM_CreateDevEnum, &clsidDevice, &pEm, 0);
 136         if (res == S_FALSE) /* S_FALSE means no category */
 137             res = MK_E_NOOBJECT;
 138     }
 139
 140     if (SUCCEEDED(res))
 141     {
 142         pMoniker = DEVENUM_IMediaCatMoniker_Construct();
 143         if (pMoniker)
 144         {
 145             if (RegCreateKeyW(((EnumMonikerImpl *)pEm)->hkey,
 146                                pszBetween,
 147                                &pMoniker->hkey) == ERROR_SUCCESS)
 148                 *ppmkOut = (LPMONIKER)pMoniker;
 149             else
 150             {
 151                 IMoniker_Release((LPMONIKER)pMoniker);
 152                 res = MK_E_NOOBJECT;
 153             }
 154         }
 155     }
 156
 157     if (pEm)
 158         IEnumMoniker_Release(pEm);
 159
 160     if (pszClass)
 161         CoTaskMemFree(pszClass);
 162
 163     TRACE("-- returning: %lx\n", res);
 164     return res;
 165 }
 166
 167 /**********************************************************************
 168  * IParseDisplayName_Vtbl
 169  */
 170 static IParseDisplayNameVtbl IParseDisplayName_Vtbl =
 171 {
 172     DEVENUM_IParseDisplayName_QueryInterface,
 173     DEVENUM_IParseDisplayName_AddRef,
 174     DEVENUM_IParseDisplayName_Release,
 175     DEVENUM_IParseDisplayName_ParseDisplayName
 176 };
 177
 178 /* The one instance of this class */
 179 ParseDisplayNameImpl DEVENUM_ParseDisplayName = { &IParseDisplayName_Vtbl, 0 };