VirtualBox

source: vbox/trunk/src/VBox/Runtime/nt/RTNtPathExpand8dot3PathA.cpp

Last change on this file was 106061, checked in by vboxsync, 3 months ago

Copyright year updates by scm.

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1/* $Id: RTNtPathExpand8dot3PathA.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
2/** @file
3 * IPRT - Native NT, RTNtPathExpand8dot3PathA.
4 */
5
6/*
7 * Copyright (C) 2006-2024 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * The contents of this file may alternatively be used under the terms
26 * of the Common Development and Distribution License Version 1.0
27 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28 * in the VirtualBox distribution, in which case the provisions of the
29 * CDDL are applicable instead of those of the GPL.
30 *
31 * You may elect to license modified versions of this file under the
32 * terms and conditions of either the GPL or the CDDL or both.
33 *
34 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35 */
36
37
38/*********************************************************************************************************************************
39* Header Files *
40*********************************************************************************************************************************/
41#define LOG_GROUP RTLOGGROUP_FS
42#ifdef IN_SUP_HARDENED_R3
43# include <iprt/nt/nt-and-windows.h>
44#else
45# include <iprt/nt/nt.h>
46#endif
47
48#include <iprt/err.h>
49#include <iprt/string.h>
50#include <iprt/path.h>
51#include <iprt/utf16.h>
52
53
54
55/**
56 * Wrapper around RTNtPathExpand8dot3Path that allocates a buffer instead of
57 * working on the input buffer.
58 *
59 * @returns IPRT status code, see RTNtPathExpand8dot3Path().
60 * @param pUniStrSrc The path to fix up. MaximumLength is the max buffer
61 * length.
62 * @param fPathOnly Whether to only process the path and leave the filename
63 * as passed in.
64 * @param pUniStrDst Output string. On success, the caller must use
65 * RTUtf16Free to free what the Buffer member points to.
66 * This is all zeros and NULL on failure.
67 */
68RTDECL(int) RTNtPathExpand8dot3PathA(PCUNICODE_STRING pUniStrSrc, bool fPathOnly, PUNICODE_STRING pUniStrDst)
69{
70 /* Guess a reasonable size for the final version. */
71 size_t const cbShort = pUniStrSrc->Length;
72 size_t cbLong = RT_MIN(_64K - 1, cbShort * 8);
73 if (cbLong < RTPATH_MAX)
74 cbLong = RTPATH_MAX * 2;
75 AssertCompile(RTPATH_MAX * 2 < _64K);
76
77 pUniStrDst->Buffer = (WCHAR *)RTUtf16Alloc(cbLong);
78 if (pUniStrDst->Buffer != NULL)
79 {
80 /* Copy over the short name and fix it up. */
81 pUniStrDst->MaximumLength = (uint16_t)cbLong;
82 pUniStrDst->Length = (uint16_t)cbShort;
83 memcpy(pUniStrDst->Buffer, pUniStrSrc->Buffer, cbShort);
84 pUniStrDst->Buffer[cbShort / sizeof(WCHAR)] = '\0';
85 int rc = RTNtPathExpand8dot3Path(pUniStrDst, fPathOnly);
86 if (RT_SUCCESS(rc))
87 return rc;
88
89 /* We failed, bail. */
90 RTUtf16Free(pUniStrDst->Buffer);
91 pUniStrDst->Buffer = NULL;
92 }
93 pUniStrDst->Length = 0;
94 pUniStrDst->MaximumLength = 0;
95 return VERR_NO_UTF16_MEMORY;
96}
97
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