Ugh, it seems that Windows doesn't even check to make sure the storage file is
at least 24 bytes long. It looks like we were -too- good at checking for
valid storage files.
Versus current CVS
ChangeLog:
-Move StgIsStorageFile16's implementation to StgIsStorageFile; port it to
Win32.
-Move StgIsStorageFile from storage.c to storage32.c
-StgIsStorageFile only returns S_OK, STG_E_FILENOTFOUND, and S_FALSE (checked
against MSDN and WinXP)
-StgIsStorageFile doesn't check if a file is large enough to be a storage
file, it only checks for the presence of the 8-byte magic (checked against
WinXP)
Index: dlls/ole32/storage.c
===================================================================
RCS file: /home/wine/wine/dlls/ole32/storage.c,v
retrieving revision 1.25
diff -u -r1.25 storage.c
--- dlls/ole32/storage.c 12 Sep 2002 22:28:01 -0000 1.25
+++ dlls/ole32/storage.c 16 Nov 2002 01:04:19 -0000
@@ -30,6 +30,7 @@
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
+#include "heap.h"
#include "windef.h"
#include "winternl.h"
#include "winerror.h"
@@ -76,8 +77,6 @@
static const BYTE STORAGE_magic[8] ={0xd0,0xcf,0x11,0xe0,0xa1,0xb1,0x1a,0xe1};
-static const BYTE STORAGE_notmagic[8]={0x0e,0x11,0xfc,0x0d,0xd0,0xcf,0x11,0xe0};
-static const BYTE STORAGE_oldmagic[8]={0xd0,0xcf,0x11,0xe0,0x0e,0x11,0xfc,0x0d};
#define BIGSIZE 512
#define SMALLSIZE 64
@@ -1638,55 +1637,17 @@
* StgIsStorageFile [STORAGE.5]
*/
HRESULT WINAPI StgIsStorageFile16(LPCOLESTR16 fn) {
- HFILE hf;
- OFSTRUCT ofs;
- BYTE magic[24];
+ LPWSTR strW;
+ HRESULT ret;
- TRACE("(\'%s\')\n",fn);
- hf = OpenFile(fn,&ofs,OF_SHARE_DENY_NONE);
- if (hf==HFILE_ERROR)
- return STG_E_FILENOTFOUND;
- if (24!=_lread(hf,magic,24)) {
- WARN(" too short\n");
- _lclose(hf);
- return S_FALSE;
- }
- if (!memcmp(magic,STORAGE_magic,8)) {
- WARN(" -> YES\n");
- _lclose(hf);
- return S_OK;
- }
- if (!memcmp(magic,STORAGE_notmagic,8)) {
- WARN(" -> NO\n");
- _lclose(hf);
- return S_FALSE;
- }
- if (!memcmp(magic,STORAGE_oldmagic,8)) {
- WARN(" -> old format\n");
- _lclose(hf);
- return STG_E_OLDFORMAT;
- }
- WARN(" -> Invalid header.\n");
- _lclose(hf);
- return STG_E_INVALIDHEADER;
-}
+ strW = HEAP_strdupAtoW( GetProcessHeap(), 0, fn );
-/******************************************************************************
- * StgIsStorageFile [OLE32.146]
- */
-HRESULT WINAPI
-StgIsStorageFile(LPCOLESTR fn)
-{
- HRESULT ret;
- DWORD len = WideCharToMultiByte( CP_ACP, 0, fn, -1, NULL, 0, NULL, NULL );
- LPSTR strA = HeapAlloc( GetProcessHeap(), 0, len );
-
- WideCharToMultiByte( CP_ACP, 0, fn, -1, strA, len, NULL, NULL );
- ret = StgIsStorageFile16(strA);
- HeapFree( GetProcessHeap(), 0, strA );
- return ret;
-}
+ ret = StgIsStorageFile( strW );
+ HeapFree( GetProcessHeap(), 0, strW );
+
+ return ret;
+}
/******************************************************************************
* StgOpenStorage [STORAGE.3]
Index: dlls/ole32/storage32.c
===================================================================
RCS file: /home/wine/wine/dlls/ole32/storage32.c,v
retrieving revision 1.34
diff -u -r1.34 storage32.c
--- dlls/ole32/storage32.c 16 Aug 2002 19:55:14 -0000 1.34
+++ dlls/ole32/storage32.c 16 Nov 2002 01:04:20 -0000
@@ -7155,3 +7155,44 @@
FIXME("(%s), unimplemented stub!\n",debugstr_guid(guid));
return E_FAIL;
}
+
+/******************************************************************************
+ * StgIsStorageFile [OLE32.146]
+ */
+HRESULT WINAPI
+StgIsStorageFile(LPCOLESTR fn)
+{
+ HANDLE hf;
+ BYTE magic[8];
+ DWORD bytes_read;
+
+ TRACE("(\'%s\')\n", debugstr_w(fn));
+ hf = CreateFileW(fn, GENERIC_READ,
+ FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
+ NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
+
+ if (hf == INVALID_HANDLE_VALUE)
+ return STG_E_FILENOTFOUND;
+
+ if (!ReadFile(hf, magic, 8, &bytes_read, NULL))
+ {
+ WARN(" unable to read file\n");
+ CloseHandle(hf);
+ return S_FALSE;
+ }
+
+ CloseHandle(hf);
+
+ if (bytes_read != 8) {
+ WARN(" too short\n");
+ return S_FALSE;
+ }
+
+ if (!memcmp(magic,STORAGE_magic,8)) {
+ WARN(" -> YES\n");
+ return S_OK;
+ }
+
+ WARN(" -> Invalid header.\n");
+ return S_FALSE;
+}
