dlls/quartz/enummoniker.c

   1 /*
   2  * IEnumMoniker implementation
   3  *
   4  * Copyright 2003 Robert Shearman
   5  *
   6  * This file contains the (internal) driver registration functions,
   7  * driver enumeration APIs and DirectDraw creation functions.
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  */
  23
  24 #define COBJMACROS
  25
  26 #include "quartz_private.h"
  27
  28 #include "wine/debug.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
  31
  32 typedef struct EnumMonikerImpl
  33 {
  34     const IEnumMonikerVtbl *lpVtbl;
  35     LONG ref;
  36     IMoniker ** ppMoniker;
  37     ULONG nMonikerCount;
  38     ULONG index;
  39 } EnumMonikerImpl;
  40
  41 static const IEnumMonikerVtbl EnumMonikerImpl_Vtbl;
  42
  43 static ULONG WINAPI EnumMonikerImpl_AddRef(LPENUMMONIKER iface);
  44
  45 HRESULT EnumMonikerImpl_Create(IMoniker ** ppMoniker, ULONG nMonikerCount, IEnumMoniker ** ppEnum)
  46 {
  47     /* NOTE: assumes that array of IMonikers has already been AddRef'd
  48      * I.e. this function does not AddRef the array of incoming
  49      * IMonikers */
  50     EnumMonikerImpl * pemi = CoTaskMemAlloc(sizeof(EnumMonikerImpl));
  51
  52     TRACE("(%p, %d, %p)\n", ppMoniker, nMonikerCount, ppEnum);
  53
  54     *ppEnum = NULL;
  55
  56     if (!pemi)
  57         return E_OUTOFMEMORY;
  58
  59     pemi->lpVtbl = &EnumMonikerImpl_Vtbl;
  60     pemi->ref = 1;
  61     pemi->ppMoniker = CoTaskMemAlloc(nMonikerCount * sizeof(IMoniker*));
  62     memcpy(pemi->ppMoniker, ppMoniker, nMonikerCount*sizeof(IMoniker*));
  63     pemi->nMonikerCount = nMonikerCount;
  64     pemi->index = 0;
  65
  66     *ppEnum = (IEnumMoniker *)pemi;
  67
  68     return S_OK;
  69 }
  70
  71 /**********************************************************************
  72  * IEnumMoniker_QueryInterface (also IUnknown)
  73  */
  74 static HRESULT WINAPI EnumMonikerImpl_QueryInterface(
  75     LPENUMMONIKER iface,
  76     REFIID riid,
  77     LPVOID *ppvObj)
  78 {
  79     EnumMonikerImpl *This = (EnumMonikerImpl *)iface;
  80     TRACE("\n\tIID:\t%s\n",debugstr_guid(riid));
  81
  82     if (This == NULL || ppvObj == NULL) return E_POINTER;
  83
  84     if (IsEqualGUID(riid, &IID_IUnknown) ||
  85         IsEqualGUID(riid, &IID_IEnumMoniker))
  86     {
  87         *ppvObj = (LPVOID)iface;
  88         EnumMonikerImpl_AddRef(iface);
  89         return S_OK;
  90     }
  91
  92     *ppvObj = NULL;
  93     FIXME("- no interface\n\tIID:\t%s\n", debugstr_guid(riid));
  94     return E_NOINTERFACE;
  95 }
  96
  97 /**********************************************************************
  98  * IEnumMoniker_AddRef (also IUnknown)
  99  */
 100 static ULONG WINAPI EnumMonikerImpl_AddRef(LPENUMMONIKER iface)
 101 {
 102     EnumMonikerImpl *This = (EnumMonikerImpl *)iface;
 103     ULONG ref;
 104
 105     if (This == NULL) return E_POINTER;
 106
 107     ref = InterlockedIncrement(&This->ref);
 108
 109     TRACE("(%p)->() AddRef from %d\n", iface, ref - 1);
 110
 111     return ref;
 112 }
 113
 114 /**********************************************************************
 115  * IEnumMoniker_Release (also IUnknown)
 116  */
 117 static ULONG WINAPI EnumMonikerImpl_Release(LPENUMMONIKER iface)
 118 {
 119     EnumMonikerImpl *This = (EnumMonikerImpl *)iface;
 120     ULONG ref = InterlockedDecrement(&This->ref);
 121
 122     TRACE("(%p)->() Release from %d\n", iface, ref + 1);
 123
 124     if (!ref)
 125     {
 126         CoTaskMemFree(This->ppMoniker);
 127         This->ppMoniker = NULL;
 128         CoTaskMemFree(This);
 129         return 0;
 130     }
 131     return ref;
 132 }
 133
 134 static HRESULT WINAPI EnumMonikerImpl_Next(LPENUMMONIKER iface, ULONG celt, IMoniker ** rgelt, ULONG * pceltFetched)
 135 {
 136     ULONG fetched;
 137     EnumMonikerImpl *This = (EnumMonikerImpl *)iface;
 138
 139     TRACE("(%p)->(%d, %p, %p)\n", iface, celt, rgelt, pceltFetched);
 140
 141     for (fetched = 0; (This->index + fetched < This->nMonikerCount) && (fetched < celt); fetched++)
 142     {
 143         rgelt[fetched] = This->ppMoniker[This->index + fetched];
 144         IMoniker_AddRef(rgelt[fetched]);
 145     }
 146
 147     This->index += fetched;
 148
 149     TRACE("-- fetched %d\n", fetched);
 150
 151     if (pceltFetched)
 152         *pceltFetched = fetched;
 153
 154     if (fetched != celt)
 155         return S_FALSE;
 156     else
 157         return S_OK;
 158 }
 159
 160 static HRESULT WINAPI EnumMonikerImpl_Skip(LPENUMMONIKER iface, ULONG celt)
 161 {
 162     EnumMonikerImpl *This = (EnumMonikerImpl *)iface;
 163
 164     TRACE("(%p)->(%d)\n", iface, celt);
 165
 166     This->index += celt;
 167
 168     return S_OK;
 169 }
 170
 171 static HRESULT WINAPI EnumMonikerImpl_Reset(LPENUMMONIKER iface)
 172 {
 173     EnumMonikerImpl *This = (EnumMonikerImpl *)iface;
 174
 175     TRACE("(%p)->()\n", iface);
 176
 177     This->index = 0;
 178
 179     return S_OK;
 180 }
 181
 182 static HRESULT WINAPI EnumMonikerImpl_Clone(LPENUMMONIKER iface, IEnumMoniker ** ppenum)
 183 {
 184     FIXME("(%p)->(%p): stub\n", iface, ppenum);
 185
 186     return E_NOTIMPL;
 187 }
 188
 189 /**********************************************************************
 190  * IEnumMoniker_Vtbl
 191  */
 192 static const IEnumMonikerVtbl EnumMonikerImpl_Vtbl =
 193 {
 194     EnumMonikerImpl_QueryInterface,
 195     EnumMonikerImpl_AddRef,
 196     EnumMonikerImpl_Release,
 197     EnumMonikerImpl_Next,
 198     EnumMonikerImpl_Skip,
 199     EnumMonikerImpl_Reset,
 200     EnumMonikerImpl_Clone
 201 };