1 files changed, 120 insertions, 0 deletions
diff --git a/tools/source/fsys/wldcrd.cxx b/tools/source/fsys/wldcrd.cxx
new file mode 100644
index 000000000..e8199975c
--- /dev/null
+++ b/tools/source/fsys/wldcrd.cxx
@@ -0,0 +1,120 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <tools/wldcrd.hxx>
+
+/** Tests, whether a wildcard in pWild will match for pStr.
+ *
+ * '*' in pWild means n chars for n > 0.
+ * '?' in pWild mean match exactly one character.
+ *
+ */
+bool WildCard::ImpMatch( std::u16string_view aWild, std::u16string_view aStr )
+{
+    const sal_Unicode* pPosAfterAsterisk = nullptr;
+    const sal_Unicode* pWild = aWild.data();
+    const sal_Unicode* pWildEnd = aWild.data() + aWild.size();
+    const sal_Unicode* pStr = aStr.data();
+    const sal_Unicode* pStrEnd = aStr.data() + aStr.size();
+
+    while (pWild != pWildEnd)
+    {
+        switch (*pWild)
+        {
+            case '?':
+                if ( pStr == pStrEnd )
+                    return false;
+                break; // Match -> proceed to the next character
+            case '\\': // Escaping '?' and '*'; don't we need to escape '\\'?
+                if ((pWild + 1 != pWildEnd) && ((*(pWild + 1) == '?') || (*(pWild + 1) == '*')))
+                    pWild++;
+                [[fallthrough]];
+            default: // No wildcard, literal match
+                if (pStr == pStrEnd)
+                    return false;
+                if (*pWild == *pStr)
+                    break; // Match -> proceed to the next character
+                if (!pPosAfterAsterisk)
+                    return false;
+                pWild = pPosAfterAsterisk;
+                [[fallthrough]];
+            case '*':
+                while ( pWild != pWildEnd && *pWild == '*' )
+                    pWild++;
+                if ( pWild == pWildEnd )
+                    return true;
+                // Consider strange things like "**?*?*"
+                while (*pWild == '?')
+                {
+                    if (pStr == pStrEnd)
+                        return false;
+                    pWild++;
+                    pStr++;
+                    while (pWild != pWildEnd && *pWild == '*')
+                        pWild++;
+                    if (pWild == pWildEnd)
+                        return true;
+                }
+                // At this point, we are past wildcards, and a literal match must follow
+                if ( pStr == pStrEnd )
+                    return false;
+                pPosAfterAsterisk = pWild;
+                if ((*pWild == '\\') && (pWild + 1 != pWildEnd) && ((*(pWild + 1) == '?') || (*(pWild + 1) == '*')))
+                    pWild++;
+                while (*pStr != *pWild)
+                {
+                    pStr++;
+                    if ( pStr == pStrEnd )
+                        return false;
+                }
+                break; // Match -> proceed to the next character
+        }
+        // We arrive here when the current characters in pWild and pStr match
+        assert(pWild != pWildEnd);
+        pWild++;
+        assert(pStr != pStrEnd);
+        pStr++;
+        if (pWild == pWildEnd && pPosAfterAsterisk && pStr != pStrEnd)
+            pWild = pPosAfterAsterisk; // Try again on the rest of pStr
+    }
+    assert(pWild == pWildEnd);
+    return pStr == pStrEnd;
+}
+
+bool WildCard::Matches( std::u16string_view rString ) const
+{
+    std::u16string_view aTmpWild = aWildString;
+
+    size_t nSepPos;
+
+    if ( cSepSymbol != '\0' )
+    {
+        while ( (nSepPos = aTmpWild.find(cSepSymbol)) != std::u16string_view::npos )
+        {
+            // Check all split wildcards
+            if ( ImpMatch( aTmpWild.substr( 0, nSepPos ), rString ) )
+                return true;
+            aTmpWild = aTmpWild.substr(nSepPos + 1); // remove separator
+        }
+    }
+
+    return ImpMatch( aTmpWild, rString );
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */