From ed5640d8b587fbcfed7dd7967f3de04b37a76f26 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 11:06:44 +0200
Subject: Adding upstream version 4:7.4.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 vcl/source/fontsubset/xlat.cxx | 144 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100644 vcl/source/fontsubset/xlat.cxx

(limited to 'vcl/source/fontsubset/xlat.cxx')

diff --git a/vcl/source/fontsubset/xlat.cxx b/vcl/source/fontsubset/xlat.cxx
new file mode 100644
index 000000000..b7966f279
--- /dev/null
+++ b/vcl/source/fontsubset/xlat.cxx
@@ -0,0 +1,144 @@
+/* -*- 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 <rtl/textcvt.h>
+#include "xlat.hxx"
+
+namespace {
+
+#define MAX_CVT_SELECT 6
+
+class ConverterCache
+{
+public:
+    explicit    ConverterCache();
+                ~ConverterCache();
+    sal_uInt16  convertOne( int nSelect, sal_Unicode );
+private:
+    void        ensureConverter( int nSelect );
+    rtl_UnicodeToTextConverter maConverterCache[ MAX_CVT_SELECT+1 ];
+    rtl_UnicodeToTextContext maContexts[ MAX_CVT_SELECT+1 ];
+};
+
+ConverterCache::ConverterCache()
+{
+    for( int i = 0; i <= MAX_CVT_SELECT; ++i)
+    {
+        maConverterCache[i] = nullptr;
+        maContexts[i] = nullptr;
+    }
+}
+
+ConverterCache::~ConverterCache()
+{
+    for( int i = 0; i <= MAX_CVT_SELECT; ++i)
+    {
+        if( !maContexts[i] )
+            continue;
+        rtl_destroyUnicodeToTextContext( maConverterCache[i], maContexts[i] );
+        rtl_destroyUnicodeToTextConverter( maConverterCache[i] );
+    }
+}
+
+void ConverterCache::ensureConverter( int nSelect )
+{
+    // SAL_WARN_IF( (2>nSelect) || (nSelect>MAX_CVT_SELECT)), "vcl", "invalid XLAT.Converter requested" );
+    rtl_UnicodeToTextContext aContext = maContexts[ nSelect ];
+    if( !aContext )
+    {
+        rtl_TextEncoding eRecodeFrom = RTL_TEXTENCODING_UNICODE;
+        switch( nSelect )
+        {
+            default: nSelect = 1; [[fallthrough]]; // to unicode recoding
+            case 1: eRecodeFrom = RTL_TEXTENCODING_UNICODE; break;
+            case 2: eRecodeFrom = RTL_TEXTENCODING_SHIFT_JIS; break;
+            case 3: eRecodeFrom = RTL_TEXTENCODING_GB_2312; break;
+            case 4: eRecodeFrom = RTL_TEXTENCODING_BIG5; break;
+            case 5: eRecodeFrom = RTL_TEXTENCODING_MS_949; break;
+            case 6: eRecodeFrom = RTL_TEXTENCODING_MS_1361; break;
+        }
+        rtl_UnicodeToTextConverter aRecodeConverter = rtl_createUnicodeToTextConverter( eRecodeFrom );
+        maConverterCache[ nSelect ] = aRecodeConverter;
+
+        aContext = rtl_createUnicodeToTextContext( aRecodeConverter );
+        maContexts[ nSelect ] = aContext;
+    }
+
+    rtl_resetUnicodeToTextContext( maConverterCache[ nSelect ], aContext );
+}
+
+sal_uInt16 ConverterCache::convertOne( int nSelect, sal_Unicode aChar )
+{
+    ensureConverter( nSelect );
+
+    sal_Unicode aUCS2Char = aChar;
+    char aTempArray[8];
+    sal_Size nTempSize;
+    sal_uInt32 nCvtInfo;
+
+    // TODO: use direct unicode->mbcs converter should there ever be one
+    int nCodeLen = rtl_convertUnicodeToText(
+            maConverterCache[ nSelect ], maContexts[ nSelect ],
+            &aUCS2Char, 1, aTempArray, sizeof(aTempArray),
+            RTL_UNICODETOTEXT_FLAGS_UNDEFINED_0
+            | RTL_UNICODETOTEXT_FLAGS_INVALID_0,
+            &nCvtInfo, &nTempSize );
+
+    sal_uInt16 aCode = aTempArray[0];
+    for( int i = 1; i < nCodeLen; ++i )
+        aCode = (aCode << 8) + (aTempArray[i] & 0xFF);
+    return aCode;
+}
+
+} // anonymous namespace
+
+namespace vcl
+{
+
+static ConverterCache aCC;
+
+sal_uInt16 TranslateChar12(sal_uInt16 src)
+{
+    return aCC.convertOne( 2, src);
+}
+
+sal_uInt16 TranslateChar13(sal_uInt16 src)
+{
+    return aCC.convertOne( 3, src);
+}
+
+sal_uInt16 TranslateChar14(sal_uInt16 src)
+{
+    return aCC.convertOne( 4, src);
+}
+
+sal_uInt16 TranslateChar15(sal_uInt16 src)
+{
+    return aCC.convertOne( 5, src);
+}
+
+sal_uInt16 TranslateChar16(sal_uInt16 src)
+{
+    return aCC.convertOne( 6, src);
+}
+
+
+} // namespace vcl
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
-- 
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