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[wine/gsoc_explorer.git] / dlls / quartz / enummoniker.c
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1 /*
2 * IEnumMoniker implementation
4 * Copyright 2003 Robert Shearman
6 * This file contains the (internal) driver registration functions,
7 * driver enumeration APIs and DirectDraw creation functions.
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.
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.
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
24 #define COBJMACROS
26 #include "quartz_private.h"
28 #include "wine/debug.h"
30 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
32 typedef struct EnumMonikerImpl
34 IEnumMoniker IEnumMoniker_iface;
35 LONG ref;
36 IMoniker ** ppMoniker;
37 ULONG nMonikerCount;
38 ULONG index;
39 } EnumMonikerImpl;
41 static const IEnumMonikerVtbl EnumMonikerImpl_Vtbl;
43 static inline EnumMonikerImpl *impl_from_IEnumMoniker(IEnumMoniker *iface)
45 return CONTAINING_RECORD(iface, EnumMonikerImpl, IEnumMoniker_iface);
48 static ULONG WINAPI EnumMonikerImpl_AddRef(LPENUMMONIKER iface);
50 HRESULT EnumMonikerImpl_Create(IMoniker ** ppMoniker, ULONG nMonikerCount, IEnumMoniker ** ppEnum)
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));
57 TRACE("(%p, %d, %p)\n", ppMoniker, nMonikerCount, ppEnum);
59 *ppEnum = NULL;
61 if (!pemi)
62 return E_OUTOFMEMORY;
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;
71 *ppEnum = &pemi->IEnumMoniker_iface;
73 return S_OK;
76 /**********************************************************************
77 * IEnumMoniker_QueryInterface (also IUnknown)
79 static HRESULT WINAPI EnumMonikerImpl_QueryInterface(
80 LPENUMMONIKER iface,
81 REFIID riid,
82 LPVOID *ppvObj)
84 EnumMonikerImpl *This = impl_from_IEnumMoniker(iface);
85 TRACE("\n\tIID:\t%s\n",debugstr_guid(riid));
87 if (This == NULL || ppvObj == NULL) return E_POINTER;
89 if (IsEqualGUID(riid, &IID_IUnknown) ||
90 IsEqualGUID(riid, &IID_IEnumMoniker))
92 *ppvObj = iface;
93 EnumMonikerImpl_AddRef(iface);
94 return S_OK;
97 *ppvObj = NULL;
98 FIXME("- no interface\n\tIID:\t%s\n", debugstr_guid(riid));
99 return E_NOINTERFACE;
102 /**********************************************************************
103 * IEnumMoniker_AddRef (also IUnknown)
105 static ULONG WINAPI EnumMonikerImpl_AddRef(LPENUMMONIKER iface)
107 EnumMonikerImpl *This = impl_from_IEnumMoniker(iface);
108 ULONG ref;
110 if (This == NULL) return E_POINTER;
112 ref = InterlockedIncrement(&This->ref);
114 TRACE("(%p)->() AddRef from %d\n", iface, ref - 1);
116 return ref;
119 /**********************************************************************
120 * IEnumMoniker_Release (also IUnknown)
122 static ULONG WINAPI EnumMonikerImpl_Release(LPENUMMONIKER iface)
124 EnumMonikerImpl *This = impl_from_IEnumMoniker(iface);
125 ULONG ref = InterlockedDecrement(&This->ref);
127 TRACE("(%p)->() Release from %d\n", iface, ref + 1);
129 if (!ref)
131 ULONG i;
133 for (i = 0; i < This->nMonikerCount; i++)
134 IMoniker_Release(This->ppMoniker[i]);
136 CoTaskMemFree(This->ppMoniker);
137 This->ppMoniker = NULL;
138 CoTaskMemFree(This);
139 return 0;
141 return ref;
144 static HRESULT WINAPI EnumMonikerImpl_Next(LPENUMMONIKER iface, ULONG celt, IMoniker ** rgelt, ULONG * pceltFetched)
146 ULONG fetched;
147 EnumMonikerImpl *This = impl_from_IEnumMoniker(iface);
149 TRACE("(%p)->(%d, %p, %p)\n", iface, celt, rgelt, pceltFetched);
151 for (fetched = 0; (This->index + fetched < This->nMonikerCount) && (fetched < celt); fetched++)
153 rgelt[fetched] = This->ppMoniker[This->index + fetched];
154 IMoniker_AddRef(rgelt[fetched]);
157 This->index += fetched;
159 TRACE("-- fetched %d\n", fetched);
161 if (pceltFetched)
162 *pceltFetched = fetched;
164 if (fetched != celt)
165 return S_FALSE;
166 else
167 return S_OK;
170 static HRESULT WINAPI EnumMonikerImpl_Skip(LPENUMMONIKER iface, ULONG celt)
172 EnumMonikerImpl *This = impl_from_IEnumMoniker(iface);
174 TRACE("(%p)->(%d)\n", iface, celt);
176 This->index += celt;
178 return S_OK;
181 static HRESULT WINAPI EnumMonikerImpl_Reset(LPENUMMONIKER iface)
183 EnumMonikerImpl *This = impl_from_IEnumMoniker(iface);
185 TRACE("(%p)->()\n", iface);
187 This->index = 0;
189 return S_OK;
192 static HRESULT WINAPI EnumMonikerImpl_Clone(LPENUMMONIKER iface, IEnumMoniker ** ppenum)
194 FIXME("(%p)->(%p): stub\n", iface, ppenum);
196 return E_NOTIMPL;
199 /**********************************************************************
200 * IEnumMoniker_Vtbl
202 static const IEnumMonikerVtbl EnumMonikerImpl_Vtbl =
204 EnumMonikerImpl_QueryInterface,
205 EnumMonikerImpl_AddRef,
206 EnumMonikerImpl_Release,
207 EnumMonikerImpl_Next,
208 EnumMonikerImpl_Skip,
209 EnumMonikerImpl_Reset,
210 EnumMonikerImpl_Clone