| 1 | /* $Id: rtpath-root-length-template.cpp.h 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - rtPathRootLengthEx - Code Template.
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| 4 | *
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| 5 | * Include this from a path-style template file.
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| 6 | */
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| 7 |
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| 8 | /*
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| 9 | * Copyright (C) 2019-2023 Oracle and/or its affiliates.
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| 10 | *
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| 11 | * This file is part of VirtualBox base platform packages, as
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| 12 | * available from https://www.virtualbox.org.
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| 13 | *
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| 14 | * This program is free software; you can redistribute it and/or
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| 15 | * modify it under the terms of the GNU General Public License
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| 16 | * as published by the Free Software Foundation, in version 3 of the
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| 17 | * License.
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| 18 | *
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| 19 | * This program is distributed in the hope that it will be useful, but
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| 20 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 22 | * General Public License for more details.
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| 23 | *
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| 24 | * You should have received a copy of the GNU General Public License
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| 25 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 26 | *
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| 27 | * The contents of this file may alternatively be used under the terms
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| 28 | * of the Common Development and Distribution License Version 1.0
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| 29 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 30 | * in the VirtualBox distribution, in which case the provisions of the
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| 31 | * CDDL are applicable instead of those of the GPL.
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| 32 | *
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| 33 | * You may elect to license modified versions of this file under the
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| 34 | * terms and conditions of either the GPL or the CDDL or both.
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| 35 | *
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| 36 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 37 | */
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| 38 |
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| 39 |
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| 40 | /*********************************************************************************************************************************
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| 41 | * Header Files *
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| 42 | *********************************************************************************************************************************/
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| 43 | #include <iprt/ctype.h>
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| 44 |
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| 45 |
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| 46 | /**
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| 47 | * Inlined helper for determining the length of the root component.
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| 48 | */
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| 49 | DECLINLINE(size_t) RTPATH_STYLE_FN(rtPathRootLengthEx)(const char *pszPath, uint32_t fFlags)
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| 50 | {
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| 51 | if (RTPATH_IS_SLASH(pszPath[0]))
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| 52 | {
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| 53 | if (fFlags & RTPATH_STR_F_NO_START)
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| 54 | return 0;
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| 55 | #if RTPATH_STYLE == RTPATH_STR_F_STYLE_DOS
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| 56 | if (RTPATH_IS_SLASH(pszPath[1]))
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| 57 | {
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| 58 | /* UNC - there are exactly two prefix slashes followed by a namespace
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| 59 | or computer name, which can be empty on windows. */
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| 60 | size_t cchRoot = 2;
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| 61 | while (!RTPATH_IS_SLASH(pszPath[cchRoot]) && pszPath[cchRoot])
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| 62 | cchRoot++;
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| 63 | if (RTPATH_IS_SLASH(pszPath[cchRoot]))
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| 64 | cchRoot++;
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| 65 | return cchRoot;
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| 66 | }
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| 67 | #endif
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| 68 | return 1;
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| 69 | }
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| 70 | #if RTPATH_STYLE == RTPATH_STR_F_STYLE_DOS
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| 71 | if (RT_C_IS_ALPHA(pszPath[0]) && pszPath[1] == ':')
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| 72 | {
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| 73 | if (!RTPATH_IS_SLASH(pszPath[2]))
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| 74 | return 2;
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| 75 | return 3;
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| 76 | }
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| 77 | #endif
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| 78 | return 0;
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| 79 | }
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| 80 |
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