| 1 | /* $Id: RTPathParse.cpp 25645 2010-01-05 09:29:31Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - RTPathParse
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2007 Sun Microsystems, Inc.
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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 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
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| 27 | * Clara, CA 95054 USA or visit http://www.sun.com if you need
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| 28 | * additional information or have any questions.
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| 29 | */
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| 30 |
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| 31 |
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| 32 | /*******************************************************************************
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| 33 | * Header Files *
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| 34 | *******************************************************************************/
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| 35 | #include "internal/iprt.h"
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| 36 | #include <iprt/path.h>
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| 37 |
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| 38 |
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| 39 | /**
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| 40 | * Parses a path.
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| 41 | *
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| 42 | * It figures the length of the directory component, the offset of
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| 43 | * the file name and the location of the suffix dot.
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| 44 | *
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| 45 | * @returns The path length.
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| 46 | *
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| 47 | * @param pszPath Path to find filename in.
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| 48 | * @param pcchDir Where to put the length of the directory component. If
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| 49 | * no directory, this will be 0. Optional.
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| 50 | * @param poffName Where to store the filename offset.
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| 51 | * If empty string or if it's ending with a slash this
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| 52 | * will be set to -1. Optional.
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| 53 | * @param poffSuff Where to store the suffix offset (the last dot).
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| 54 | * If empty string or if it's ending with a slash this
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| 55 | * will be set to -1. Optional.
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| 56 | */
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| 57 | RTDECL(size_t) RTPathParse(const char *pszPath, size_t *pcchDir, ssize_t *poffName, ssize_t *poffSuff)
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| 58 | {
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| 59 | const char *psz = pszPath;
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| 60 | ssize_t offRoot = 0;
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| 61 | const char *pszName = pszPath;
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| 62 | const char *pszLastDot = NULL;
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| 63 |
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| 64 | for (;; psz++)
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| 65 | {
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| 66 | switch (*psz)
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| 67 | {
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| 68 | /* handle separators. */
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| 69 | #if defined(RT_OS_WINDOWS) || defined(RT_OS_OS2)
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| 70 | case ':':
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| 71 | pszName = psz + 1;
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| 72 | offRoot = pszName - psz;
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| 73 | break;
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| 74 |
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| 75 | case '\\':
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| 76 | #endif
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| 77 | case '/':
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| 78 | pszName = psz + 1;
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| 79 | break;
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| 80 |
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| 81 | case '.':
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| 82 | pszLastDot = psz;
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| 83 | break;
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| 84 |
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| 85 | /*
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| 86 | * The end. Complete the results.
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| 87 | */
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| 88 | case '\0':
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| 89 | {
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| 90 | ssize_t offName = *pszName != '\0' ? pszName - pszPath : -1;
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| 91 | if (poffName)
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| 92 | *poffName = offName;
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| 93 |
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| 94 | if (poffSuff)
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| 95 | {
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| 96 | ssize_t offSuff = -1;
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| 97 | if (pszLastDot)
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| 98 | {
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| 99 | offSuff = pszLastDot - pszPath;
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| 100 | if (offSuff <= offName)
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| 101 | offSuff = -1;
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| 102 | }
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| 103 | *poffSuff = offSuff;
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| 104 | }
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| 105 |
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| 106 | if (pcchDir)
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| 107 | {
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| 108 | ssize_t off = offName - 1;
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| 109 | while (off >= offRoot && RTPATH_IS_SLASH(pszPath[off]))
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| 110 | off--;
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| 111 | *pcchDir = RT_MAX(off, offRoot) + 1;
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| 112 | }
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| 113 |
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| 114 | return psz - pszPath;
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| 115 | }
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| 116 | }
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| 117 | }
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| 118 |
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| 119 | /* will never get here */
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| 120 | return 0;
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| 121 | }
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| 122 |
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