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/* $Id: rtpath-root-length-template.cpp.h $ */
/** @file
* IPRT - rtPathRootLengthEx - Code Template.
*
* Include this from a path-style template file.
*/
/*
* Copyright (C) 2019-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/ctype.h>
/**
* Inlined helper for determining the length of the root component.
*/
DECLINLINE(size_t) RTPATH_STYLE_FN(rtPathRootLengthEx)(const char *pszPath, uint32_t fFlags)
{
if (RTPATH_IS_SLASH(pszPath[0]))
{
if (fFlags & RTPATH_STR_F_NO_START)
return 0;
#if RTPATH_STYLE == RTPATH_STR_F_STYLE_DOS
if (RTPATH_IS_SLASH(pszPath[1]))
{
/* UNC - there are exactly two prefix slashes followed by a namespace
or computer name, which can be empty on windows. */
size_t cchRoot = 2;
while (!RTPATH_IS_SLASH(pszPath[cchRoot]) && pszPath[cchRoot])
cchRoot++;
if (RTPATH_IS_SLASH(pszPath[cchRoot]))
cchRoot++;
return cchRoot;
}
#endif
return 1;
}
#if RTPATH_STYLE == RTPATH_STR_F_STYLE_DOS
if (RT_C_IS_ALPHA(pszPath[0]) && pszPath[1] == ':')
{
if (!RTPATH_IS_SLASH(pszPath[2]))
return 2;
return 3;
}
#endif
return 0;
}
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