i18npool/source/transliteration/ignoreKiKuFollowedBySa_ja_JP.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <transliteration_Ignore.hxx>
  21
  22 #include <numeric>
  23
  24 using namespace com::sun::star::uno;
  25
  26 namespace i18npool {
  27
  28 OUString
  29 ignoreKiKuFollowedBySa_ja_JP::foldingImpl( const OUString& inStr, sal_Int32 startPos, sal_Int32 nCount, Sequence< sal_Int32 >* pOffset )
  30 {
  31     // Create a string buffer which can hold nCount + 1 characters.
  32     // The reference count is 1 now.
  33     rtl_uString * newStr = rtl_uString_alloc(nCount);
  34     sal_Unicode * dst = newStr->buffer;
  35     const sal_Unicode * src = inStr.getStr() + startPos;
  36
  37     if (pOffset) {
  38         // Allocate nCount length to offset argument.
  39         pOffset->realloc( nCount );
  40         auto [begin, end] = asNonConstRange(*pOffset);
  41         std::iota(begin, end, startPos);
  42     }
  43
  44
  45     sal_Unicode previousChar = *src ++;
  46     sal_Unicode currentChar;
  47
  48     // Translation
  49     while (-- nCount > 0) {
  50         currentChar = *src ++;
  51
  52         // KU + Sa-So --> KI + Sa-So
  53         if (previousChar == 0x30AF ) { // KATAKANA LETTER KU
  54             if (0x30B5 <= currentChar && // KATAKANA LETTER SA
  55                     currentChar <= 0x30BE) { // KATAKANA LETTER ZO
  56                 *dst ++ = 0x30AD;          // KATAKANA LETTER KI
  57                 *dst ++ = currentChar;
  58                 previousChar = *src ++;
  59                 nCount --;
  60                 continue;
  61             }
  62         }
  63
  64         *dst ++ = previousChar;
  65         previousChar = currentChar;
  66     }
  67
  68     if (nCount == 0) {
  69         *dst ++ = previousChar;
  70     }
  71
  72     *dst = u'\0';
  73
  74     newStr->length = sal_Int32(dst - newStr->buffer);
  75     if (pOffset)
  76         pOffset->realloc(newStr->length);
  77     return OUString(newStr, SAL_NO_ACQUIRE); // take ownership
  78 }
  79
  80 }
  81
  82 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */