2 * SHLWAPI IStream functions
4 * Copyright 2002 Jon Griffiths
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
28 #define NO_SHLWAPI_REG
29 #define NO_SHLWAPI_PATH
31 #include "wine/debug.h"
33 WINE_DEFAULT_DEBUG_CHANNEL(shell
);
35 /*************************************************************************
38 * Determine if a stream has 0 length.
41 * lpStream [I] IStream object
44 * TRUE: If the stream has 0 length
47 BOOL WINAPI
SHIsEmptyStream(IStream
*lpStream
)
52 TRACE("(%p)\n", lpStream
);
54 memset(&statstg
, 0, sizeof(statstg
));
56 if(SUCCEEDED(IStream_Stat(lpStream
, &statstg
, 1)))
58 if(statstg
.cbSize
.QuadPart
)
59 bRet
= FALSE
; /* Non-Zero */
63 DWORD dummy
, read_len
;
65 /* Try to read from the stream */
66 if (SUCCEEDED(IStream_Read(lpStream
, &dummy
, sizeof(dummy
), &read_len
)) && read_len
== sizeof(dummy
))
71 IStream_Seek(lpStream
, zero
, 0, NULL
);
72 bRet
= FALSE
; /* Non-Zero */