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/* $Id: RTNtPathFindPossible8dot3Name.cpp $ */
/** @file
* IPRT - Native NT, RTNtPathFindPossible8dot3Name.
*/
/*
* Copyright (C) 2006-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP RTLOGGROUP_FS
#ifdef IN_SUP_HARDENED_R3
# include <iprt/nt/nt-and-windows.h>
#else
# include <iprt/nt/nt.h>
#endif
/**
* Checks whether the path could be containing alternative 8.3 names generated
* by NTFS, FAT, or other similar file systems.
*
* @returns Pointer to the first component that might be an 8.3 name, NULL if
* not 8.3 path.
* @param pwszPath The path to check.
*
* @remarks This is making bad ASSUMPTION wrt to the naming scheme of 8.3 names,
* however, non-tilde 8.3 aliases are probably rare enough to not be
* worth all the extra code necessary to open each path component and
* check if we've got the short name or not.
*/
RTDECL(PRTUTF16) RTNtPathFindPossible8dot3Name(PCRTUTF16 pwszPath)
{
PCRTUTF16 pwszName = pwszPath;
for (;;)
{
RTUTF16 wc = *pwszPath++;
if (wc == '~')
{
/* Could check more here before jumping to conclusions... */
if (pwszPath - pwszName <= 8+1+3)
return (PRTUTF16)pwszName;
}
else if (wc == '\\' || wc == '/' || wc == ':')
pwszName = pwszPath;
else if (wc == 0)
break;
}
return NULL;
}
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