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/* $Id: RTNtPathExpand8dot3PathA.cpp $ */
/** @file
* IPRT - Native NT, RTNtPathExpand8dot3PathA.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox 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.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* 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
#include <iprt/err.h>
#include <iprt/string.h>
#include <iprt/path.h>
#include <iprt/utf16.h>
/**
* Wrapper around RTNtPathExpand8dot3Path that allocates a buffer instead of
* working on the input buffer.
*
* @returns IPRT status code, see RTNtPathExpand8dot3Path().
* @param pUniStrSrc The path to fix up. MaximumLength is the max buffer
* length.
* @param fPathOnly Whether to only process the path and leave the filename
* as passed in.
* @param pUniStrDst Output string. On success, the caller must use
* RTUtf16Free to free what the Buffer member points to.
* This is all zeros and NULL on failure.
*/
RTDECL(int) RTNtPathExpand8dot3PathA(PCUNICODE_STRING pUniStrSrc, bool fPathOnly, PUNICODE_STRING pUniStrDst)
{
/* Guess a reasonable size for the final version. */
size_t const cbShort = pUniStrSrc->Length;
size_t cbLong = RT_MIN(_64K - 1, cbShort * 8);
if (cbLong < RTPATH_MAX)
cbLong = RTPATH_MAX * 2;
AssertCompile(RTPATH_MAX * 2 < _64K);
pUniStrDst->Buffer = (WCHAR *)RTUtf16Alloc(cbLong);
if (pUniStrDst->Buffer != NULL)
{
/* Copy over the short name and fix it up. */
pUniStrDst->MaximumLength = (uint16_t)cbLong;
pUniStrDst->Length = (uint16_t)cbShort;
memcpy(pUniStrDst->Buffer, pUniStrSrc->Buffer, cbShort);
pUniStrDst->Buffer[cbShort / sizeof(WCHAR)] = '\0';
int rc = RTNtPathExpand8dot3Path(pUniStrDst, fPathOnly);
if (RT_SUCCESS(rc))
return rc;
/* We failed, bail. */
RTUtf16Free(pUniStrDst->Buffer);
pUniStrDst->Buffer = NULL;
}
pUniStrDst->Length = 0;
pUniStrDst->MaximumLength = 0;
return VERR_NO_UTF16_MEMORY;
}
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