120 lines
4.4 KiB
C++
120 lines
4.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <tools/wldcrd.hxx>
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/** Tests, whether a wildcard in pWild will match for pStr.
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*
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* '*' in pWild means n chars for n > 0.
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* '?' in pWild mean match exactly one character.
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*
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*/
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bool WildCard::ImpMatch( std::u16string_view aWild, std::u16string_view aStr )
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{
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const sal_Unicode* pPosAfterAsterisk = nullptr;
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const sal_Unicode* pWild = aWild.data();
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const sal_Unicode* pWildEnd = aWild.data() + aWild.size();
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const sal_Unicode* pStr = aStr.data();
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const sal_Unicode* pStrEnd = aStr.data() + aStr.size();
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while (pWild != pWildEnd)
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{
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switch (*pWild)
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{
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case '?':
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if ( pStr == pStrEnd )
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return false;
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break; // Match -> proceed to the next character
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case '\\': // Escaping '?' and '*'; don't we need to escape '\\'?
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if ((pWild + 1 != pWildEnd) && ((*(pWild + 1) == '?') || (*(pWild + 1) == '*')))
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pWild++;
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[[fallthrough]];
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default: // No wildcard, literal match
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if (pStr == pStrEnd)
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return false;
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if (*pWild == *pStr)
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break; // Match -> proceed to the next character
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if (!pPosAfterAsterisk)
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return false;
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pWild = pPosAfterAsterisk;
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[[fallthrough]];
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case '*':
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while ( pWild != pWildEnd && *pWild == '*' )
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pWild++;
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if ( pWild == pWildEnd )
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return true;
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// Consider strange things like "**?*?*"
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while (*pWild == '?')
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{
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if (pStr == pStrEnd)
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return false;
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pWild++;
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pStr++;
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while (pWild != pWildEnd && *pWild == '*')
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pWild++;
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if (pWild == pWildEnd)
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return true;
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}
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// At this point, we are past wildcards, and a literal match must follow
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if ( pStr == pStrEnd )
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return false;
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pPosAfterAsterisk = pWild;
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if ((*pWild == '\\') && (pWild + 1 != pWildEnd) && ((*(pWild + 1) == '?') || (*(pWild + 1) == '*')))
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pWild++;
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while (*pStr != *pWild)
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{
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pStr++;
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if ( pStr == pStrEnd )
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return false;
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}
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break; // Match -> proceed to the next character
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}
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// We arrive here when the current characters in pWild and pStr match
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assert(pWild != pWildEnd);
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pWild++;
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assert(pStr != pStrEnd);
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pStr++;
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if (pWild == pWildEnd && pPosAfterAsterisk && pStr != pStrEnd)
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pWild = pPosAfterAsterisk; // Try again on the rest of pStr
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}
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assert(pWild == pWildEnd);
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return pStr == pStrEnd;
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}
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bool WildCard::Matches( std::u16string_view rString ) const
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{
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std::u16string_view aTmpWild = aWildString;
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size_t nSepPos;
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if ( cSepSymbol != '\0' )
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{
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while ( (nSepPos = aTmpWild.find(cSepSymbol)) != std::u16string_view::npos )
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{
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// Check all split wildcards
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if ( ImpMatch( aTmpWild.substr( 0, nSepPos ), rString ) )
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return true;
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aTmpWild = aTmpWild.substr(nSepPos + 1); // remove separator
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}
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}
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return ImpMatch( aTmpWild, rString );
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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