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/* $Id: simplepattern.cpp $ */
/** @file
* IPRT - RTStrSimplePattern.
*/
/*
* Copyright (C) 2006-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE 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.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include <iprt/string.h>
#include "internal/iprt.h"
#include <iprt/assert.h>
RTDECL(bool) RTStrSimplePatternMatch(const char *pszPattern, const char *pszString)
{
#if 0
return RTStrSimplePatternNMatch(pszPattern, RTSTR_MAX, pszString, RTSTR_MAX);
#else
/* ASSUMES ASCII / UTF-8 */
for (;;)
{
char chPat = *pszPattern;
switch (chPat)
{
default:
if (*pszString != chPat)
return false;
break;
case '*':
{
/* collapse '*' and '?', they are superfluous */
while ((chPat = *++pszPattern) == '*' || chPat == '?')
/* nothing */;
/* if no more pattern, we're done now. */
if (!chPat)
return true;
/* find chPat in the string and try get a match on the remaining pattern. */
for (;;)
{
char chStr = *pszString++;
if ( chStr == chPat
&& RTStrSimplePatternMatch(pszPattern + 1, pszString))
return true;
if (!chStr)
return false;
}
/* won't ever get here */
break;
}
case '?':
if (!*pszString)
return false;
break;
case '\0':
return !*pszString;
}
pszString++;
pszPattern++;
}
#endif
}
RT_EXPORT_SYMBOL(RTStrSimplePatternMatch);
RTDECL(bool) RTStrSimplePatternNMatch(const char *pszPattern, size_t cchPattern,
const char *pszString, size_t cchString)
{
/* ASSUMES ASCII / UTF-8 */
for (;;)
{
char chPat = cchPattern ? *pszPattern : '\0';
switch (chPat)
{
default:
{
char chStr = cchString ? *pszString : '\0';
if (chStr != chPat)
return false;
break;
}
case '*':
{
/* Collapse '*' and '?', they are superfluous. End of the pattern == match. */
do
{
if (!--cchPattern)
return true;
chPat = *++pszPattern;
} while (chPat == '*' || chPat == '?');
if (!chPat)
return true;
/* Find chPat in the string and try get a match on the remaining pattern. */
for (;;)
{
if (!cchString--)
return false;
char chStr = *pszString++;
if ( chStr == chPat
&& RTStrSimplePatternNMatch(pszPattern + 1, cchPattern - 1, pszString, cchString))
return true;
if (!chStr)
return false;
}
/* won't ever get here */
break;
}
case '?':
if (!cchString || !*pszString)
return false;
break;
case '\0':
return cchString == 0 || !*pszString;
}
/* advance */
pszString++;
cchString--;
pszPattern++;
cchPattern--;
}
}
RT_EXPORT_SYMBOL(RTStrSimplePatternNMatch);
RTDECL(bool) RTStrSimplePatternMultiMatch(const char *pszPatterns, size_t cchPatterns,
const char *pszString, size_t cchString,
size_t *poffMatchingPattern)
{
const char *pszCur = pszPatterns;
while (*pszCur && cchPatterns)
{
/*
* Find the end of the current pattern.
*/
unsigned char ch = '\0';
const char *pszEnd = pszCur;
while (cchPatterns && (ch = *pszEnd) != '\0' && ch != '|')
cchPatterns--, pszEnd++;
/*
* Try match it.
*/
if (RTStrSimplePatternNMatch(pszCur, pszEnd - pszCur, pszString, cchString))
{
if (poffMatchingPattern)
*poffMatchingPattern = pszCur - pszPatterns;
return true;
}
/* advance */
if (!ch || !cchPatterns)
break;
cchPatterns--;
pszCur = pszEnd + 1;
}
if (poffMatchingPattern)
*poffMatchingPattern = RTSTR_MAX;
return false;
}
RT_EXPORT_SYMBOL(RTStrSimplePatternMultiMatch);
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