VirtualBox

source: vbox/trunk/src/VBox/Runtime/common/path/RTPathParsedReassemble.cpp@ 96407

Last change on this file since 96407 was 96407, checked in by vboxsync, 2 years ago

scm copyright and license note update

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1/* $Id: RTPathParsedReassemble.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
2/** @file
3 * IPRT - RTPathParsedReassemble.
4 */
5
6/*
7 * Copyright (C) 2013-2022 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#include "internal/iprt.h"
42#include <iprt/path.h>
43
44#include <iprt/assert.h>
45#include <iprt/errcore.h>
46#include <iprt/string.h>
47
48
49RTDECL(int) RTPathParsedReassemble(const char *pszSrcPath, PRTPATHPARSED pParsed, uint32_t fFlags,
50 char *pszDstPath, size_t cbDstPath)
51{
52 /*
53 * Input validation.
54 */
55 AssertPtrReturn(pszSrcPath, VERR_INVALID_POINTER);
56 AssertPtrReturn(pParsed, VERR_INVALID_POINTER);
57 AssertReturn(pParsed->cComps > 0, VERR_INVALID_PARAMETER);
58 AssertReturn(RTPATH_STR_F_IS_VALID(fFlags, 0) && !(fFlags & RTPATH_STR_F_MIDDLE), VERR_INVALID_FLAGS);
59 AssertPtrReturn(pszDstPath, VERR_INVALID_POINTER);
60
61 /*
62 * Recalculate the length.
63 */
64 uint32_t const cComps = pParsed->cComps;
65 uint32_t idxComp = 0;
66 uint32_t cchPath = 0;
67 if (RTPATH_PROP_HAS_ROOT_SPEC(pParsed->fProps))
68 {
69 cchPath = pParsed->aComps[0].cch;
70 idxComp++;
71 }
72 bool fNeedSlash = false;
73 while (idxComp < cComps)
74 {
75 uint32_t const cchComp = pParsed->aComps[idxComp].cch;
76 idxComp++;
77 if (cchComp > 0)
78 {
79 cchPath += cchComp + fNeedSlash;
80 fNeedSlash = true;
81 }
82 }
83 if ((pParsed->fProps & RTPATH_PROP_DIR_SLASH) && fNeedSlash)
84 cchPath += 1;
85 pParsed->cchPath = cchPath;
86 if (cbDstPath > cchPath)
87 { /* likely */ }
88 else
89 {
90 if (cbDstPath)
91 *pszDstPath = '\0';
92 return VERR_BUFFER_OVERFLOW;
93 }
94
95 /*
96 * Figure which slash to use.
97 */
98 char chSlash;
99 switch (fFlags & RTPATH_STR_F_STYLE_MASK)
100 {
101 case RTPATH_STR_F_STYLE_HOST:
102 chSlash = RTPATH_SLASH;
103 break;
104
105 case RTPATH_STR_F_STYLE_DOS:
106 chSlash = '\\';
107 break;
108
109 case RTPATH_STR_F_STYLE_UNIX:
110 chSlash = '/';
111 break;
112
113 default:
114 AssertFailedReturn(VERR_INVALID_FLAGS); /* impossible */
115 }
116
117 /*
118 * Do the joining.
119 * Note! Using memmove here as we want to support pszSrcPath == pszDstPath.
120 */
121 char *pszDst = pszDstPath;
122 idxComp = 0;
123 fNeedSlash = false;
124
125 if (RTPATH_PROP_HAS_ROOT_SPEC(pParsed->fProps))
126 {
127 uint32_t cchComp = pParsed->aComps[0].cch;
128 memmove(pszDst, &pszSrcPath[pParsed->aComps[0].off], cchComp);
129
130 /* fix the slashes (harmless for unix style) */
131 char chOtherSlash = chSlash == '\\' ? '/' : '\\';
132 while (cchComp-- > 0)
133 {
134 if (*pszDst == chOtherSlash)
135 *pszDst = chSlash;
136 pszDst++;
137 }
138 idxComp = 1;
139 }
140
141 while (idxComp < cComps)
142 {
143 uint32_t const cchComp = pParsed->aComps[idxComp].cch;
144 if (cchComp > 0)
145 {
146 if (fNeedSlash)
147 *pszDst++ = chSlash;
148 fNeedSlash = true;
149 memmove(pszDst, &pszSrcPath[pParsed->aComps[idxComp].off], cchComp);
150 pszDst += cchComp;
151 }
152 idxComp++;
153 }
154
155 if ((pParsed->fProps & RTPATH_PROP_DIR_SLASH) && fNeedSlash)
156 *pszDst++ = chSlash;
157 *pszDst = '\0';
158
159 return VINF_SUCCESS;
160}
161
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