| 1 | /* $Id: rtPathRootSpecLen.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - rtPathRootSpecLen (internal).
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2010-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #include "internal/iprt.h"
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| 42 | #include <iprt/path.h>
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| 43 |
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| 44 | #include <iprt/assert.h>
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| 45 | #include <iprt/ctype.h>
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| 46 | #include "internal/path.h"
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| 47 |
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| 48 | /**
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| 49 | * Figures out the length of the root (or drive) specifier in @a pszPath.
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| 50 | *
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| 51 | * For UNC names, we consider the root specifier to include both the server and
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| 52 | * share names.
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| 53 | *
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| 54 | * @returns The length including all slashes. 0 if relative path.
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| 55 | *
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| 56 | * @param pszPath The path to examine.
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| 57 | */
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| 58 | DECLHIDDEN(size_t) rtPathRootSpecLen(const char *pszPath)
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| 59 | {
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| 60 | /*
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| 61 | * If it's an absolute path, threat the root or volume specification as
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| 62 | * component 0. UNC is making this extra fun on OS/2 and Windows as usual.
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| 63 | */
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| 64 | size_t off = 0;
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| 65 | if (RTPATH_IS_SLASH(pszPath[0]))
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| 66 | {
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| 67 | #if defined(RT_OS_OS2) || defined(RT_OS_WINDOWS)
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| 68 | if ( RTPATH_IS_SLASH(pszPath[1])
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| 69 | && !RTPATH_IS_SLASH(pszPath[2])
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| 70 | && pszPath[2])
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| 71 | {
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| 72 | /* UNC server name */
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| 73 | off = 2;
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| 74 | while (!RTPATH_IS_SLASH(pszPath[off]) && pszPath[off])
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| 75 | off++;
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| 76 | while (RTPATH_IS_SLASH(pszPath[off]))
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| 77 | off++;
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| 78 |
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| 79 | /* UNC share */
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| 80 | while (!RTPATH_IS_SLASH(pszPath[off]) && pszPath[off])
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| 81 | off++;
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| 82 | }
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| 83 | else
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| 84 | #endif
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| 85 | {
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| 86 | off = 1;
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| 87 | }
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| 88 | while (RTPATH_IS_SLASH(pszPath[off]))
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| 89 | off++;
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| 90 | }
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| 91 | #if defined(RT_OS_OS2) || defined(RT_OS_WINDOWS)
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| 92 | else if (RT_C_IS_ALPHA(pszPath[0]) && pszPath[1] == ':')
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| 93 | {
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| 94 | off = 2;
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| 95 | while (RTPATH_IS_SLASH(pszPath[off]))
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| 96 | off++;
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| 97 | }
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| 98 | #endif
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| 99 | Assert(!RTPATH_IS_SLASH(pszPath[off]));
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| 100 |
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| 101 | return off;
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| 102 | }
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| 103 |
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