1 files changed, 145 insertions, 0 deletions
diff --git a/i18nutil/source/utility/oneToOneMapping.cxx b/i18nutil/source/utility/oneToOneMapping.cxx
new file mode 100644
index 000000000..fbb7054d9
--- /dev/null
+++ b/i18nutil/source/utility/oneToOneMapping.cxx
@@ -0,0 +1,145 @@
+/* -*- 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 <i18nutil/oneToOneMapping.hxx>
+
+namespace i18nutil {
+
+oneToOneMapping::oneToOneMapping( OneToOneMappingTable_t const *rpTable, const size_t rnBytes, const size_t rnUnitSize )
+    : mpTable( rpTable ),
+      mnSize( rnBytes / rnUnitSize )
+{
+}
+
+oneToOneMapping::~oneToOneMapping()
+{
+}
+
+sal_Unicode oneToOneMapping::find(const sal_Unicode nKey) const
+{
+    if( mpTable )
+    {
+        // binary search
+        int bottom = 0;
+        int top = mnSize - 1;
+
+        for (;;) {
+            const int current = (top + bottom) / 2;
+            if( nKey < mpTable[current].first )
+                top = current - 1;
+            else if( nKey > mpTable[current].first )
+                bottom = current + 1;
+            else
+                return mpTable[current].second;
+
+            if( bottom > top )
+                return nKey;
+        }
+    }
+    else
+        return nKey;
+}
+
+oneToOneMappingWithFlag::oneToOneMappingWithFlag( UnicodePairWithFlag const *rpTableWF, const size_t rnSize, const UnicodePairFlag rnFlag )
+    : oneToOneMapping( nullptr, rnSize, sizeof(UnicodePairWithFlag) ),
+      mpTableWF ( rpTableWF ),
+      mnFlag    ( rnFlag ),
+      mbHasIndex( false )
+{
+}
+
+oneToOneMappingWithFlag::~oneToOneMappingWithFlag()
+{
+}
+
+void oneToOneMappingWithFlag::makeIndex()
+{
+    if( mbHasIndex || !mpTableWF )
+        return;
+
+    int current = -1;
+
+    for( size_t k = 0; k < mnSize; k++ )
+    {
+        const int high = (mpTableWF[k].first >> 8) & 0xFF;
+        const int low  = (mpTableWF[k].first)      & 0xFF;
+        if( high != current )
+        {
+            current = high;
+            mpIndex[high].reset(new UnicodePairWithFlag const *[256]);
+
+            for (int j = 0; j < 256; ++j)
+                mpIndex[high][j] = nullptr;
+        }
+        mpIndex[high][low] = &mpTableWF[k];
+    }
+
+    mbHasIndex = true;
+}
+
+sal_Unicode oneToOneMappingWithFlag::find( const sal_Unicode nKey ) const
+{
+    if( mpTableWF )
+    {
+        if( mbHasIndex )
+        {
+            // index search
+            int high, low;
+            high = (nKey >> 8) & 0xFF;
+            low = nKey & 0xFF;
+            if( mpIndex[high] != nullptr &&
+                mpIndex[high][low] != nullptr &&
+                mpIndex[high][low]->flag & mnFlag )
+                return mpIndex[high][low]->second;
+            else
+                return nKey;
+        }
+        else
+        {
+            // binary search
+            int bottom = 0;
+            int top = mnSize - 1;
+
+            for (;;) {
+                const int current = (top + bottom) / 2;
+                if( nKey < mpTableWF[current].first )
+                    top = current - 1;
+                else if( nKey > mpTableWF[current].first )
+                    bottom = current + 1;
+                else
+                {
+                    if( mpTableWF[current].flag & mnFlag )
+                        return mpTableWF[current].second;
+                    else
+                        return nKey;
+                }
+
+                if( bottom > top )
+                    return nKey;
+            }
+        }
+    }
+    else
+        return nKey;
+}
+
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */