| 1 | /* $Id: RTPathParsedReassemble.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - RTPathParsedReassemble.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2013-2020 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #include "internal/iprt.h"
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| 32 | #include <iprt/path.h>
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| 33 |
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| 34 | #include <iprt/assert.h>
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| 35 | #include <iprt/errcore.h>
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| 36 | #include <iprt/string.h>
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| 37 |
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| 38 |
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| 39 | RTDECL(int) RTPathParsedReassemble(const char *pszSrcPath, PRTPATHPARSED pParsed, uint32_t fFlags,
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| 40 | char *pszDstPath, size_t cbDstPath)
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| 41 | {
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| 42 | /*
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| 43 | * Input validation.
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| 44 | */
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| 45 | AssertPtrReturn(pszSrcPath, VERR_INVALID_POINTER);
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| 46 | AssertPtrReturn(pParsed, VERR_INVALID_POINTER);
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| 47 | AssertReturn(pParsed->cComps > 0, VERR_INVALID_PARAMETER);
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| 48 | AssertReturn(RTPATH_STR_F_IS_VALID(fFlags, 0) && !(fFlags & RTPATH_STR_F_MIDDLE), VERR_INVALID_FLAGS);
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| 49 | AssertPtrReturn(pszDstPath, VERR_INVALID_POINTER);
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| 50 |
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| 51 | /*
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| 52 | * Recalculate the length.
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| 53 | */
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| 54 | uint32_t const cComps = pParsed->cComps;
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| 55 | uint32_t idxComp = 0;
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| 56 | uint32_t cchPath = 0;
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| 57 | if (RTPATH_PROP_HAS_ROOT_SPEC(pParsed->fProps))
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| 58 | {
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| 59 | cchPath = pParsed->aComps[0].cch;
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| 60 | idxComp++;
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| 61 | }
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| 62 | bool fNeedSlash = false;
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| 63 | while (idxComp < cComps)
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| 64 | {
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| 65 | uint32_t const cchComp = pParsed->aComps[idxComp].cch;
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| 66 | idxComp++;
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| 67 | if (cchComp > 0)
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| 68 | {
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| 69 | cchPath += cchComp + fNeedSlash;
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| 70 | fNeedSlash = true;
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| 71 | }
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| 72 | }
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| 73 | if ((pParsed->fProps & RTPATH_PROP_DIR_SLASH) && fNeedSlash)
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| 74 | cchPath += 1;
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| 75 | pParsed->cchPath = cchPath;
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| 76 | if (cbDstPath > cchPath)
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| 77 | { /* likely */ }
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| 78 | else
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| 79 | {
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| 80 | if (cbDstPath)
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| 81 | *pszDstPath = '\0';
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| 82 | return VERR_BUFFER_OVERFLOW;
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| 83 | }
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| 84 |
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| 85 | /*
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| 86 | * Figure which slash to use.
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| 87 | */
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| 88 | char chSlash;
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| 89 | switch (fFlags & RTPATH_STR_F_STYLE_MASK)
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| 90 | {
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| 91 | case RTPATH_STR_F_STYLE_HOST:
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| 92 | chSlash = RTPATH_SLASH;
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| 93 | break;
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| 94 |
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| 95 | case RTPATH_STR_F_STYLE_DOS:
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| 96 | chSlash = '\\';
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| 97 | break;
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| 98 |
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| 99 | case RTPATH_STR_F_STYLE_UNIX:
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| 100 | chSlash = '/';
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| 101 | break;
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| 102 |
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| 103 | default:
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| 104 | AssertFailedReturn(VERR_INVALID_FLAGS); /* impossible */
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| 105 | }
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| 106 |
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| 107 | /*
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| 108 | * Do the joining.
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| 109 | * Note! Using memmove here as we want to support pszSrcPath == pszDstPath.
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| 110 | */
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| 111 | char *pszDst = pszDstPath;
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| 112 | idxComp = 0;
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| 113 | fNeedSlash = false;
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| 114 |
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| 115 | if (RTPATH_PROP_HAS_ROOT_SPEC(pParsed->fProps))
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| 116 | {
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| 117 | uint32_t cchComp = pParsed->aComps[0].cch;
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| 118 | memmove(pszDst, &pszSrcPath[pParsed->aComps[0].off], cchComp);
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| 119 |
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| 120 | /* fix the slashes (harmless for unix style) */
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| 121 | char chOtherSlash = chSlash == '\\' ? '/' : '\\';
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| 122 | while (cchComp-- > 0)
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| 123 | {
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| 124 | if (*pszDst == chOtherSlash)
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| 125 | *pszDst = chSlash;
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| 126 | pszDst++;
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| 127 | }
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| 128 | idxComp = 1;
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| 129 | }
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| 130 |
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| 131 | while (idxComp < cComps)
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| 132 | {
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| 133 | uint32_t const cchComp = pParsed->aComps[idxComp].cch;
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| 134 | if (cchComp > 0)
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| 135 | {
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| 136 | if (fNeedSlash)
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| 137 | *pszDst++ = chSlash;
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| 138 | fNeedSlash = true;
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| 139 | memmove(pszDst, &pszSrcPath[pParsed->aComps[idxComp].off], cchComp);
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| 140 | pszDst += cchComp;
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| 141 | }
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| 142 | idxComp++;
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| 143 | }
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| 144 |
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| 145 | if ((pParsed->fProps & RTPATH_PROP_DIR_SLASH) && fNeedSlash)
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| 146 | *pszDst++ = chSlash;
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| 147 | *pszDst = '\0';
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| 148 |
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| 149 | return VINF_SUCCESS;
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| 150 | }
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| 151 |
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