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     IEnumMoniker IEnumMoniker_iface;
  35     LONG ref;
  36     IMoniker ** ppMoniker;
  37     ULONG nMonikerCount;
  38     ULONG index;
  39 } EnumMonikerImpl;
  40
  41 static const IEnumMonikerVtbl EnumMonikerImpl_Vtbl;
  42
  43 static inline EnumMonikerImpl *impl_from_IEnumMoniker(IEnumMoniker *iface)
  44 {
  45     return CONTAINING_RECORD(iface, EnumMonikerImpl, IEnumMoniker_iface);
  46 }
  47
  48 static ULONG WINAPI EnumMonikerImpl_AddRef(LPENUMMONIKER iface);
  49
  50 HRESULT EnumMonikerImpl_Create(IMoniker ** ppMoniker, ULONG nMonikerCount, IEnumMoniker ** ppEnum)
  51 {
  52     /* NOTE: assumes that array of IMonikers has already been AddRef'd
  53      * I.e. this function does not AddRef the array of incoming
  54      * IMonikers */
  55     EnumMonikerImpl * pemi = CoTaskMemAlloc(sizeof(EnumMonikerImpl));
  56
  57     TRACE("(%p, %d, %p)\n", ppMoniker, nMonikerCount, ppEnum);
  58
  59     *ppEnum = NULL;
  60
  61     if (!pemi)
  62         return E_OUTOFMEMORY;
  63
  64     pemi->IEnumMoniker_iface.lpVtbl = &EnumMonikerImpl_Vtbl;
  65     pemi->ref = 1;
  66     pemi->ppMoniker = CoTaskMemAlloc(nMonikerCount * sizeof(IMoniker*));
  67     memcpy(pemi->ppMoniker, ppMoniker, nMonikerCount*sizeof(IMoniker*));
  68     pemi->nMonikerCount = nMonikerCount;
  69     pemi->index = 0;
  70
  71     *ppEnum = &pemi->IEnumMoniker_iface;
  72
  73     return S_OK;
  74 }
  75
  76 /**********************************************************************
  77  * IEnumMoniker_QueryInterface (also IUnknown)
  78  */
  79 static HRESULT WINAPI EnumMonikerImpl_QueryInterface(
  80     LPENUMMONIKER iface,
  81     REFIID riid,
  82     LPVOID *ppvObj)
  83 {
  84     EnumMonikerImpl *This = impl_from_IEnumMoniker(iface);
  85     TRACE("\n\tIID:\t%s\n",debugstr_guid(riid));
  86
  87     if (This == NULL || ppvObj == NULL) return E_POINTER;
  88
  89     if (IsEqualGUID(riid, &IID_IUnknown) ||
  90         IsEqualGUID(riid, &IID_IEnumMoniker))
  91     {
  92         *ppvObj = iface;
  93         EnumMonikerImpl_AddRef(iface);
  94         return S_OK;
  95     }
  96
  97     *ppvObj = NULL;
  98     FIXME("- no interface\n\tIID:\t%s\n", debugstr_guid(riid));
  99     return E_NOINTERFACE;
 100 }
 101
 102 /**********************************************************************
 103  * IEnumMoniker_AddRef (also IUnknown)
 104  */
 105 static ULONG WINAPI EnumMonikerImpl_AddRef(LPENUMMONIKER iface)
 106 {
 107     EnumMonikerImpl *This = impl_from_IEnumMoniker(iface);
 108     ULONG ref;
 109
 110     if (This == NULL) return E_POINTER;
 111
 112     ref = InterlockedIncrement(&This->ref);
 113
 114     TRACE("(%p)->() AddRef from %d\n", iface, ref - 1);
 115
 116     return ref;
 117 }
 118
 119 /**********************************************************************
 120  * IEnumMoniker_Release (also IUnknown)
 121  */
 122 static ULONG WINAPI EnumMonikerImpl_Release(LPENUMMONIKER iface)
 123 {
 124     EnumMonikerImpl *This = impl_from_IEnumMoniker(iface);
 125     ULONG ref = InterlockedDecrement(&This->ref);
 126
 127     TRACE("(%p)->() Release from %d\n", iface, ref + 1);
 128
 129     if (!ref)
 130     {
 131         ULONG i;
 132
 133         for (i = 0; i < This->nMonikerCount; i++)
 134             IMoniker_Release(This->ppMoniker[i]);
 135
 136         CoTaskMemFree(This->ppMoniker);
 137         This->ppMoniker = NULL;
 138         CoTaskMemFree(This);
 139         return 0;
 140     }
 141     return ref;
 142 }
 143
 144 static HRESULT WINAPI EnumMonikerImpl_Next(LPENUMMONIKER iface, ULONG celt, IMoniker ** rgelt, ULONG * pceltFetched)
 145 {
 146     ULONG fetched;
 147     EnumMonikerImpl *This = impl_from_IEnumMoniker(iface);
 148
 149     TRACE("(%p)->(%d, %p, %p)\n", iface, celt, rgelt, pceltFetched);
 150
 151     for (fetched = 0; (This->index + fetched < This->nMonikerCount) && (fetched < celt); fetched++)
 152     {
 153         rgelt[fetched] = This->ppMoniker[This->index + fetched];
 154         IMoniker_AddRef(rgelt[fetched]);
 155     }
 156
 157     This->index += fetched;
 158
 159     TRACE("-- fetched %d\n", fetched);
 160
 161     if (pceltFetched)
 162         *pceltFetched = fetched;
 163
 164     if (fetched != celt)
 165         return S_FALSE;
 166     else
 167         return S_OK;
 168 }
 169
 170 static HRESULT WINAPI EnumMonikerImpl_Skip(LPENUMMONIKER iface, ULONG celt)
 171 {
 172     EnumMonikerImpl *This = impl_from_IEnumMoniker(iface);
 173
 174     TRACE("(%p)->(%d)\n", iface, celt);
 175
 176     This->index += celt;
 177
 178     return S_OK;
 179 }
 180
 181 static HRESULT WINAPI EnumMonikerImpl_Reset(LPENUMMONIKER iface)
 182 {
 183     EnumMonikerImpl *This = impl_from_IEnumMoniker(iface);
 184
 185     TRACE("(%p)->()\n", iface);
 186
 187     This->index = 0;
 188
 189     return S_OK;
 190 }
 191
 192 static HRESULT WINAPI EnumMonikerImpl_Clone(LPENUMMONIKER iface, IEnumMoniker ** ppenum)
 193 {
 194     FIXME("(%p)->(%p): stub\n", iface, ppenum);
 195
 196     return E_NOTIMPL;
 197 }
 198
 199 /**********************************************************************
 200  * IEnumMoniker_Vtbl
 201  */
 202 static const IEnumMonikerVtbl EnumMonikerImpl_Vtbl =
 203 {
 204     EnumMonikerImpl_QueryInterface,
 205     EnumMonikerImpl_AddRef,
 206     EnumMonikerImpl_Release,
 207     EnumMonikerImpl_Next,
 208     EnumMonikerImpl_Skip,
 209     EnumMonikerImpl_Reset,
 210     EnumMonikerImpl_Clone
 211 };