source: trunk/src/shell32/memorystream.cpp@ 3831

Last change on this file since 3831 was 3243, checked in by cbratschi, 25 years ago

merged with Corel WINE 20000324
File size: 9.1 KB
Line 
1/* $Id: memorystream.cpp,v 1.4 2000-03-26 16:34:42 cbratschi Exp $ */
2
3/*
4 * Win32 SHELL32 for OS/2
5 *
6 * Copyright 1999 Patrick Haller (haller@zebra.fh-weingarten.de)
7 * Project Odin Software License can be found in LICENSE.TXT
8 *
9 * this class implements a pure IStream object
10 * and can be used for many purposes
11 *
12 * the main reason for implementing this was
13 * a cleaner implementation of IShellLink which
14 * needs to be able to load lnk's from a IStream
15 * interface so it was obvious to capsule the file
16 * access in a IStream to.
17 *
18 * Corel WINE 20000324 level
19 */
20
21
22/*****************************************************************************
23 * Includes *
24 *****************************************************************************/
25
26#include <odin.h>
27#include <odinwrap.h>
28#include <os2sel.h>
29
30#include <string.h>
31
32#define ICOM_CINTERFACE 1
33#define CINTERFACE 1
34
35#include "wine/obj_storage.h"
36#include "heap.h"
37#include "winerror.h"
38#include "debugtools.h"
39#include "shell32_main.h"
40
41#include <misc.h>
42
43
44ODINDEBUGCHANNEL(SHELL32-MEMORYSTREAM)
45
46
47/*****************************************************************************
48 * Local Prototypes *
49 *****************************************************************************/
50
51static HRESULT WINAPI IStream_fnQueryInterface(IStream *iface, REFIID riid, LPVOID *ppvObj);
52static ULONG WINAPI IStream_fnAddRef(IStream *iface);
53static ULONG WINAPI IStream_fnRelease(IStream *iface);
54static HRESULT WINAPI IStream_fnRead (IStream * iface, void* pv, ULONG cb, ULONG* pcbRead);
55static HRESULT WINAPI IStream_fnWrite (IStream * iface, const void* pv, ULONG cb, ULONG* pcbWritten);
56static HRESULT WINAPI IStream_fnSeek (IStream * iface, LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER* plibNewPosition);
57static HRESULT WINAPI IStream_fnSetSize (IStream * iface, ULARGE_INTEGER libNewSize);
58static HRESULT WINAPI IStream_fnCopyTo (IStream * iface, IStream* pstm, ULARGE_INTEGER cb, ULARGE_INTEGER* pcbRead, ULARGE_INTEGER* pcbWritten);
59static HRESULT WINAPI IStream_fnCommit (IStream * iface, DWORD grfCommitFlags);
60static HRESULT WINAPI IStream_fnRevert (IStream * iface);
61static HRESULT WINAPI IStream_fnLockRegion (IStream * iface, ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType);
62static HRESULT WINAPI IStream_fnUnlockRegion (IStream * iface, ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType);
63static HRESULT WINAPI IStream_fnStat (IStream * iface, STATSTG* pstatstg, DWORD grfStatFlag);
64static HRESULT WINAPI IStream_fnClone (IStream * iface, IStream** ppstm);
65
66static ICOM_VTABLE(IStream) stvt =
67{
68 ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
69 IStream_fnQueryInterface,
70 IStream_fnAddRef,
71 IStream_fnRelease,
72 IStream_fnRead,
73 IStream_fnWrite,
74 IStream_fnSeek,
75 IStream_fnSetSize,
76 IStream_fnCopyTo,
77 IStream_fnCommit,
78 IStream_fnRevert,
79 IStream_fnLockRegion,
80 IStream_fnUnlockRegion,
81 IStream_fnStat,
82 IStream_fnClone
83
84};
85
86typedef struct
87{ ICOM_VTABLE(IStream) *lpvtst;
88 DWORD ref;
89 LPBYTE pImage;
90 HANDLE hMapping;
91 DWORD dwLength;
92 DWORD dwPos;
93} ISHFileStream;
94
95/**************************************************************************
96 * CreateStreamOnFile()
97 *
98 * similar to CreateStreamOnHGlobal
99 */
100HRESULT CreateStreamOnFile (LPCSTR pszFilename, IStream ** ppstm)
101{
102 ISHFileStream* fstr;
103 OFSTRUCT ofs;
104 HFILE hFile = OpenFile( pszFilename, &ofs, OF_READ );
105 HRESULT ret = E_FAIL;
106
107 dprintf(("SHELL32:MemoryStream CreateStreamOnFile(%s,%08xh)\n",
108 pszFilename,
109 ppstm));
110
111 fstr = (ISHFileStream*)HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(ISHFileStream));
112 fstr->lpvtst=&stvt;
113 fstr->ref = 1;
114 fstr->dwLength = GetFileSize (hFile, NULL);
115
116 shell32_ObjCount++;
117
118 if (!(fstr->hMapping = CreateFileMappingA(hFile,NULL,PAGE_READONLY|SEC_COMMIT,0,0,NULL)))
119 {
120 dprintf(("failed to create filemap.\n"));
121 goto end_2;
122 }
123
124 if (!(fstr->pImage = (BYTE*)MapViewOfFile(fstr->hMapping,FILE_MAP_READ,0,0,0)))
125 {
126 dprintf(("failed to mmap filemap.\n"));
127 goto end_3;
128 }
129
130 ret = S_OK;
131 goto end_1;
132
133end_3: CloseHandle(fstr->hMapping);
134end_2: HeapFree(GetProcessHeap(), 0, fstr);
135 fstr = NULL;
136
137end_1: _lclose(hFile);
138 (*ppstm) = (IStream*)fstr;
139 return ret;
140}
141
142/**************************************************************************
143* IStream_fnQueryInterface
144*/
145static HRESULT WINAPI IStream_fnQueryInterface(IStream *iface, REFIID riid, LPVOID *ppvObj)
146{
147 ICOM_THIS(ISHFileStream, iface);
148
149 char xriid[50];
150 WINE_StringFromCLSID((LPCLSID)riid,xriid);
151
152 dprintf(("SHELL32:MemoryStream IStream_fnQueryInterface(%p)->(\n\tIID:\t%s,%p)\n",
153 This,xriid,ppvObj));
154
155 *ppvObj = NULL;
156
157 if(IsEqualIID(riid, &IID_IUnknown) ||
158 IsEqualIID(riid, &IID_IStream))
159 {
160 *ppvObj = This;
161 }
162
163 if(*ppvObj)
164 {
165 IStream_AddRef((IStream*)*ppvObj);
166 dprintf(("Interface: (%p)->(%p)\n",ppvObj,*ppvObj));
167 return S_OK;
168 }
169 dprintf(("-- Interface: E_NOINTERFACE\n"));
170 return E_NOINTERFACE;
171}
172
173/**************************************************************************
174* IStream_fnAddRef
175*/
176static ULONG WINAPI IStream_fnAddRef(IStream *iface)
177{
178 ICOM_THIS(ISHFileStream, iface);
179
180 dprintf(("SHELL32:MemoryStream IStream_fnAddRef (%p)->(count=%lu)\n",
181 This, This->ref));
182
183 shell32_ObjCount++;
184 return ++(This->ref);
185}
186
187/**************************************************************************
188* IStream_fnRelease
189*/
190static ULONG WINAPI IStream_fnRelease(IStream *iface)
191{
192 ICOM_THIS(ISHFileStream, iface);
193
194 dprintf(("SHELL32:MemoryStream IStream_fnRelease(%p)->()\n",
195 This));
196
197 shell32_ObjCount--;
198
199 if (!--(This->ref))
200 { dprintf((" destroying SHFileStream (%p)\n",This));
201
202 UnmapViewOfFile(This->pImage);
203 CloseHandle(This->hMapping);
204
205 HeapFree(GetProcessHeap(),0,This);
206 return 0;
207 }
208 return This->ref;
209}
210
211static HRESULT WINAPI IStream_fnRead (IStream * iface, void* pv, ULONG cb, ULONG* pcbRead)
212{
213 DWORD dwBytesToRead, dwBytesLeft;
214
215 ICOM_THIS(ISHFileStream, iface);
216
217 dprintf(("SHELL32:MemoryStream IStream_fnRead(%p)->(%p,%p,%p)\n",
218 This, pv, cb, pcbRead));
219
220 if ( !pv )
221 return STG_E_INVALIDPOINTER;
222
223 dwBytesLeft = This->dwLength - This->dwPos;
224
225 if ( 0 >= dwBytesLeft ) /* end of buffer */
226 return S_FALSE;
227
228 dwBytesToRead = ( cb > dwBytesLeft) ? dwBytesLeft : cb;
229
230 memmove ( pv, (This->pImage) + (This->dwPos), dwBytesToRead);
231
232 This->dwPos += dwBytesToRead; /* adjust pointer */
233
234 if (pcbRead)
235 *pcbRead = dwBytesToRead;
236
237 return S_OK;
238}
239static HRESULT WINAPI IStream_fnWrite (IStream * iface, const void* pv, ULONG cb, ULONG* pcbWritten)
240{
241 ICOM_THIS(ISHFileStream, iface);
242
243 dprintf(("SHELL32:MemoryStream IStream_fnWrite (%p) not implemented\n",This));
244
245 return E_NOTIMPL;
246}
247static HRESULT WINAPI IStream_fnSeek (IStream * iface, LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER* plibNewPosition)
248{
249 ICOM_THIS(ISHFileStream, iface);
250
251 dprintf(("SHELL32:MemoryStream IStream_fnSeek (%p) not implemented\n",This));
252
253 return E_NOTIMPL;
254}
255static HRESULT WINAPI IStream_fnSetSize (IStream * iface, ULARGE_INTEGER libNewSize)
256{
257 ICOM_THIS(ISHFileStream, iface);
258
259 dprintf(("SHELL32:MemoryStream IStream_fnSetSize (%p) not implemented\n",This));
260
261 return E_NOTIMPL;
262}
263static HRESULT WINAPI IStream_fnCopyTo (IStream * iface, IStream* pstm, ULARGE_INTEGER cb, ULARGE_INTEGER* pcbRead, ULARGE_INTEGER* pcbWritten)
264{
265 ICOM_THIS(ISHFileStream, iface);
266
267 dprintf(("SHELL32:MemoryStream IStream_fnCopyTo (%p) not implemented\n",This));
268
269 return E_NOTIMPL;
270}
271static HRESULT WINAPI IStream_fnCommit (IStream * iface, DWORD grfCommitFlags)
272{
273 ICOM_THIS(ISHFileStream, iface);
274
275 dprintf(("SHELL32:MemoryStream IStream_fnCommit (%p) not implemented\n",This));
276
277 return E_NOTIMPL;
278}
279static HRESULT WINAPI IStream_fnRevert (IStream * iface)
280{
281 ICOM_THIS(ISHFileStream, iface);
282
283 dprintf(("SHELL32:MemoryStream IStream_fnRevert (%p) not implemented\n",This));
284
285 return E_NOTIMPL;
286}
287static HRESULT WINAPI IStream_fnLockRegion (IStream * iface, ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType)
288{
289 ICOM_THIS(ISHFileStream, iface);
290
291 dprintf(("SHELL32:MemoryStream IStream_fnLockRegion (%p) not implemented\n",This));
292
293 return E_NOTIMPL;
294}
295static HRESULT WINAPI IStream_fnUnlockRegion (IStream * iface, ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType)
296{
297 ICOM_THIS(ISHFileStream, iface);
298
299 dprintf(("SHELL32:MemoryStream IStream_fnUnlockRegoin (%p) not implemented.\n",This));
300
301 return E_NOTIMPL;
302}
303static HRESULT WINAPI IStream_fnStat (IStream * iface, STATSTG* pstatstg, DWORD grfStatFlag)
304{
305 ICOM_THIS(ISHFileStream, iface);
306
307 dprintf(("SHELL32:MemoryStream IStream_fnStat (%p) not implemented.\n",This));
308
309 return E_NOTIMPL;
310}
311static HRESULT WINAPI IStream_fnClone (IStream * iface, IStream** ppstm)
312{
313 ICOM_THIS(ISHFileStream, iface);
314
315 dprintf(("SHELL32:MemoryStream IStream_fnClone (%p) not implemented.\n",This));
316
317 return E_NOTIMPL;
318}
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