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     FIXME("- no interface\n\tIID:\t%s\n", debugstr_guid(riid));
  93     return E_NOINTERFACE;
  94 }
  95
  96 /**********************************************************************
  97  * IEnumMoniker_AddRef (also IUnknown)
  98  */
  99 static ULONG WINAPI EnumMonikerImpl_AddRef(LPENUMMONIKER iface)
 100 {
 101     EnumMonikerImpl *This = (EnumMonikerImpl *)iface;
 102     ULONG ref;
 103
 104     if (This == NULL) return E_POINTER;
 105
 106     ref = InterlockedIncrement(&This->ref);
 107
 108     TRACE("(%p)->() AddRef from %d\n", iface, ref - 1);
 109
 110     return ref;
 111 }
 112
 113 /**********************************************************************
 114  * IEnumMoniker_Release (also IUnknown)
 115  */
 116 static ULONG WINAPI EnumMonikerImpl_Release(LPENUMMONIKER iface)
 117 {
 118     EnumMonikerImpl *This = (EnumMonikerImpl *)iface;
 119     ULONG ref = InterlockedDecrement(&This->ref);
 120
 121     TRACE("(%p)->() Release from %d\n", iface, ref + 1);
 122
 123     if (!ref)
 124     {
 125         CoTaskMemFree(This->ppMoniker);
 126         This->ppMoniker = NULL;
 127         CoTaskMemFree(This);
 128         return 0;
 129     }
 130     return ref;
 131 }
 132
 133 static HRESULT WINAPI EnumMonikerImpl_Next(LPENUMMONIKER iface, ULONG celt, IMoniker ** rgelt, ULONG * pceltFetched)
 134 {
 135     ULONG fetched;
 136     EnumMonikerImpl *This = (EnumMonikerImpl *)iface;
 137
 138     TRACE("(%p)->(%d, %p, %p)\n", iface, celt, rgelt, pceltFetched);
 139
 140     for (fetched = 0; (This->index + fetched < This->nMonikerCount) && (fetched < celt); fetched++)
 141     {
 142         rgelt[fetched] = This->ppMoniker[This->index + fetched];
 143         IMoniker_AddRef(rgelt[fetched]);
 144     }
 145
 146     This->index += fetched;
 147
 148     TRACE("-- fetched %d\n", fetched);
 149
 150     if (pceltFetched)
 151         *pceltFetched = fetched;
 152
 153     if (fetched != celt)
 154         return S_FALSE;
 155     else
 156         return S_OK;
 157 }
 158
 159 static HRESULT WINAPI EnumMonikerImpl_Skip(LPENUMMONIKER iface, ULONG celt)
 160 {
 161     EnumMonikerImpl *This = (EnumMonikerImpl *)iface;
 162
 163     TRACE("(%p)->(%d)\n", iface, celt);
 164
 165     This->index += celt;
 166
 167     return S_OK;
 168 }
 169
 170 static HRESULT WINAPI EnumMonikerImpl_Reset(LPENUMMONIKER iface)
 171 {
 172     EnumMonikerImpl *This = (EnumMonikerImpl *)iface;
 173
 174     TRACE("(%p)->()\n", iface);
 175
 176     This->index = 0;
 177
 178     return S_OK;
 179 }
 180
 181 static HRESULT WINAPI EnumMonikerImpl_Clone(LPENUMMONIKER iface, IEnumMoniker ** ppenum)
 182 {
 183     FIXME("(%p)->(%p): stub\n", iface, ppenum);
 184
 185     return E_NOTIMPL;
 186 }
 187
 188 /**********************************************************************
 189  * IEnumMoniker_Vtbl
 190  */
 191 static const IEnumMonikerVtbl EnumMonikerImpl_Vtbl =
 192 {
 193     EnumMonikerImpl_QueryInterface,
 194     EnumMonikerImpl_AddRef,
 195     EnumMonikerImpl_Release,
 196     EnumMonikerImpl_Next,
 197     EnumMonikerImpl_Skip,
 198     EnumMonikerImpl_Reset,
 199     EnumMonikerImpl_Clone
 200 };