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/* $Id: rtPathRootSpecLen.cpp $ */
/** @file
* IPRT - rtPathRootSpecLen (internal).
*/
/*
* Copyright (C) 2010-2023 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 "internal/iprt.h"
#include <iprt/path.h>
#include <iprt/assert.h>
#include <iprt/ctype.h>
#include "internal/path.h"
/**
* Figures out the length of the root (or drive) specifier in @a pszPath.
*
* For UNC names, we consider the root specifier to include both the server and
* share names.
*
* @returns The length including all slashes. 0 if relative path.
*
* @param pszPath The path to examine.
*/
DECLHIDDEN(size_t) rtPathRootSpecLen(const char *pszPath)
{
/*
* If it's an absolute path, threat the root or volume specification as
* component 0. UNC is making this extra fun on OS/2 and Windows as usual.
*/
size_t off = 0;
if (RTPATH_IS_SLASH(pszPath[0]))
{
#if defined(RT_OS_OS2) || defined(RT_OS_WINDOWS)
if ( RTPATH_IS_SLASH(pszPath[1])
&& !RTPATH_IS_SLASH(pszPath[2])
&& pszPath[2])
{
/* UNC server name */
off = 2;
while (!RTPATH_IS_SLASH(pszPath[off]) && pszPath[off])
off++;
while (RTPATH_IS_SLASH(pszPath[off]))
off++;
/* UNC share */
while (!RTPATH_IS_SLASH(pszPath[off]) && pszPath[off])
off++;
}
else
#endif
{
off = 1;
}
while (RTPATH_IS_SLASH(pszPath[off]))
off++;
}
#if defined(RT_OS_OS2) || defined(RT_OS_WINDOWS)
else if (RT_C_IS_ALPHA(pszPath[0]) && pszPath[1] == ':')
{
off = 2;
while (RTPATH_IS_SLASH(pszPath[off]))
off++;
}
#endif
Assert(!RTPATH_IS_SLASH(pszPath[off]));
return off;
}
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