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/* $Id: comparepaths.cpp $ */
/** @file
* IPRT - Path Comparison.
*/
/*
* Copyright (C) 2006-2023 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/errcore.h>
#include <iprt/string.h>
#include <iprt/uni.h>
/**
* Helper for RTPathCompare() and RTPathStartsWith().
*
* @returns similar to strcmp.
* @param pszPath1 Path to compare.
* @param pszPath2 Path to compare.
* @param fLimit Limit the comparison to the length of \a pszPath2
* @internal
*/
static int rtPathCompare(const char *pszPath1, const char *pszPath2, bool fLimit)
{
if (pszPath1 == pszPath2)
return 0;
if (!pszPath1)
return -1;
if (!pszPath2)
return 1;
#if defined(RT_OS_WINDOWS) || defined(RT_OS_OS2)
for (;;)
{
RTUNICP uc1;
int rc = RTStrGetCpEx(&pszPath1, &uc1);
if (RT_SUCCESS(rc))
{
RTUNICP uc2;
rc = RTStrGetCpEx(&pszPath2, &uc2);
if (RT_SUCCESS(rc))
{
if (uc1 == uc2)
{
if (uc1)
{ /* likely */ }
else
return 0;
}
else
{
if (uc1 == '\\')
uc1 = '/';
else
uc1 = RTUniCpToUpper(uc1);
if (uc2 == '\\')
uc2 = '/';
else
uc2 = RTUniCpToUpper(uc2);
if (uc1 != uc2)
{
if (fLimit && uc2 == '\0')
return 0;
return uc1 > uc2 ? 1 : -1; /* (overflow/underflow paranoia) */
}
}
}
else
return 1;
}
else
return -1;
}
#else
if (!fLimit)
return strcmp(pszPath1, pszPath2);
return strncmp(pszPath1, pszPath2, strlen(pszPath2));
#endif
}
RTDECL(int) RTPathCompare(const char *pszPath1, const char *pszPath2)
{
return rtPathCompare(pszPath1, pszPath2, false /* full path lengths */);
}
RTDECL(bool) RTPathStartsWith(const char *pszPath, const char *pszParentPath)
{
if (pszPath == pszParentPath)
return true;
if (!pszPath || !pszParentPath)
return false;
if (rtPathCompare(pszPath, pszParentPath, true /* limited by path 2 */) != 0)
return false;
const size_t cchParentPath = strlen(pszParentPath);
if (RTPATH_IS_SLASH(pszPath[cchParentPath]))
return true;
if (pszPath[cchParentPath] == '\0')
return true;
/* Deal with pszParentPath = root (or having a trailing slash). */
if ( cchParentPath > 0
&& RTPATH_IS_SLASH(pszParentPath[cchParentPath - 1])
&& RTPATH_IS_SLASH(pszPath[cchParentPath - 1]))
return true;
return false;
}
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