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shell32: Helper function for unicode support in folder and file pidls.

This commit is contained in:
Michael Jung 2006-01-03 13:23:44 +01:00 committed by Alexandre Julliard
parent b34868dffa
commit 5136f57f12
2 changed files with 64 additions and 4 deletions
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53
dlls/shell32/pidl.c
View File

@ -1811,15 +1811,21 @@ DWORD _ILSimpleGetText (LPCITEMIDLIST pidl, LPSTR szOut, UINT uOutSize)
*/
DWORD _ILSimpleGetTextW (LPCITEMIDLIST pidl, LPWSTR szOut, UINT uOutSize)
{
DWORD dwReturn;
DWORD dwReturn;
char szTemp[MAX_PATH];
FileStructW *pFileStructW = _ILGetFileStructW(pidl);
TRACE("(%p %p %x)\n",pidl,szOut,uOutSize);
dwReturn = _ILSimpleGetText(pidl, szTemp, uOutSize);
if (pFileStructW) {
lstrcpynW(szOut, pFileStructW->wszName, uOutSize);
dwReturn = lstrlenW(pFileStructW->wszName);
} else {
dwReturn = _ILSimpleGetText(pidl, szTemp, MAX_PATH);
if (!MultiByteToWideChar(CP_ACP, 0, szTemp, -1, szOut, MAX_PATH))
*szOut = 0;
if (!MultiByteToWideChar(CP_ACP, 0, szTemp, -1, szOut, uOutSize))
*szOut = 0;
}
TRACE("-- (%p=%s 0x%08lx)\n",szOut,debugstr_w(szOut),dwReturn);
return dwReturn;
@ -1938,6 +1944,45 @@ IID* _ILGetGUIDPointer(LPCITEMIDLIST pidl)
return NULL;
}
/******************************************************************************
* _ILGetFileStructW [Internal]
*
* Get pointer the a SHITEMID's FileStructW field if present
*
* PARAMS
* pidl [I] The SHITEMID
*
* RETURNS
* Success: Pointer to pidl's FileStructW field.
* Failure: NULL
*/
FileStructW* _ILGetFileStructW(LPCITEMIDLIST pidl) {
FileStructW *pFileStructW;
WORD cbOffset;
if (!(_ILIsValue(pidl) || _ILIsFolder(pidl)))
return NULL;
cbOffset = *(WORD*)((LPBYTE)pidl + pidl->mkid.cb - sizeof(WORD));
pFileStructW = (FileStructW*)((LPBYTE)pidl + cbOffset);
/* Currently I don't see a fool prove way to figure out if a pidl is for sure of WinXP
* style with a FileStructW member. If we switch all our shellfolder-implementations to
* the new format, this won't be a problem. For now, we do as many sanity checks as possible. */
if (cbOffset & 0x1 || /* FileStructW member is word aligned in the pidl */
/* FileStructW is positioned after FileStruct */
cbOffset < sizeof(pidl->mkid.cb) + sizeof(PIDLTYPE) + sizeof(FileStruct) ||
/* There has to be enough space at cbOffset in the pidl to hold FileStructW and cbOffset */
cbOffset > pidl->mkid.cb - sizeof(cbOffset) - sizeof(FileStructW) ||
pidl->mkid.cb != cbOffset + pFileStructW->cbLen)
{
WARN("Invalid pidl format (cbOffset = %d)!\n", cbOffset);
return NULL;
}
return pFileStructW;
}
/*************************************************************************
* _ILGetFileDateTime
*

15
dlls/shell32/pidl.h
View File

@ -143,6 +143,20 @@ typedef struct tagFileStruct
The second the dos name when needed or just 0x00 */
} FileStruct;
/* At least on WinXP, this struct is appended with 2-byte-alignment to FileStruct. There follows
* a WORD member after the wszName string, which gives the offset from the beginning of the PIDL
* to the FileStructW member. */
typedef struct tagFileStructW {
WORD cbLen;
BYTE dummy1[6];
WORD uCreationDate;
WORD uCreationTime;
WORD uLastAccessDate;
WORD uLastAccessTime;
BYTE dummy2[4];
WCHAR wszName[1];
} FileStructW;
typedef struct tagValueW
{
WCHAR name[1];
@ -240,6 +254,7 @@ LPPIDLDATA _ILGetDataPointer (LPCITEMIDLIST);
LPSTR _ILGetTextPointer (LPCITEMIDLIST);
LPSTR _ILGetSTextPointer (LPCITEMIDLIST);
IID *_ILGetGUIDPointer (LPCITEMIDLIST pidl);
FileStructW *_ILGetFileStructW (LPCITEMIDLIST pidl);
/*
* debug helper