i18npool/source/transliteration/ignoreIandEfollowedByYa_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 <i18nutil/oneToOneMapping.hxx>
  21
  22 #include <transliteration_Ignore.hxx>
  23
  24 #include <numeric>
  25
  26 using namespace com::sun::star::uno;
  27 using namespace com::sun::star::lang;
  28
  29 namespace i18npool {
  30
  31 i18nutil::OneToOneMappingTable_t const IandE[] = {
  32     { 0x30A3, 0x0000 },  // KATAKANA LETTER SMALL I
  33     { 0x30A4, 0x0000 },  // KATAKANA LETTER I
  34     { 0x30A7, 0x0000 },  // KATAKANA LETTER SMALL E
  35     { 0x30A8, 0x0000 },  // KATAKANA LETTER E
  36     { 0x30AD, 0x0000 },  // KATAKANA LETTER KI
  37     { 0x30AE, 0x0000 },  // KATAKANA LETTER GI
  38     { 0x30B1, 0x0000 },  // KATAKANA LETTER KE
  39     { 0x30B2, 0x0000 },  // KATAKANA LETTER GE
  40     { 0x30B7, 0x0000 },  // KATAKANA LETTER SI
  41     { 0x30B8, 0x0000 },  // KATAKANA LETTER ZI
  42     { 0x30BB, 0x0000 },  // KATAKANA LETTER SE
  43     { 0x30BC, 0x0000 },  // KATAKANA LETTER ZE
  44     { 0x30C1, 0x0000 },  // KATAKANA LETTER TI
  45     { 0x30C2, 0x0000 },  // KATAKANA LETTER DI
  46     { 0x30C6, 0x0000 },  // KATAKANA LETTER TE
  47     { 0x30C7, 0x0000 },  // KATAKANA LETTER DE
  48     { 0x30CB, 0x0000 },  // KATAKANA LETTER NI
  49     { 0x30CD, 0x0000 },  // KATAKANA LETTER NE
  50     { 0x30D2, 0x0000 },  // KATAKANA LETTER HI
  51     { 0x30D3, 0x0000 },  // KATAKANA LETTER BI
  52     { 0x30D4, 0x0000 },  // KATAKANA LETTER PI
  53     { 0x30D8, 0x0000 },  // KATAKANA LETTER HE
  54     { 0x30D9, 0x0000 },  // KATAKANA LETTER BE
  55     { 0x30DA, 0x0000 },  // KATAKANA LETTER PE
  56     { 0x30DF, 0x0000 },  // KATAKANA LETTER MI
  57     { 0x30E1, 0x0000 },  // KATAKANA LETTER ME
  58     { 0x30EA, 0x0000 },  // KATAKANA LETTER RI
  59     { 0x30EC, 0x0000 },  // KATAKANA LETTER RE
  60     { 0x30F0, 0x0000 },  // KATAKANA LETTER WI
  61     { 0x30F1, 0x0000 },  // KATAKANA LETTER WE
  62     { 0x30F6, 0x0000 },  // KATAKANA LETTER SMALL KE
  63     { 0x30F8, 0x0000 },  // KATAKANA LETTER VI
  64     { 0x30F9, 0x0000 }   // KATAKANA LETTER VE
  65 };
  66
  67
  68 OUString
  69 ignoreIandEfollowedByYa_ja_JP::foldingImpl( const OUString& inStr, sal_Int32 startPos, sal_Int32 nCount, Sequence< sal_Int32 >* pOffset )
  70 {
  71     // Create a string buffer which can hold nCount + 1 characters.
  72     // The reference count is 1 now.
  73     rtl_uString * newStr = rtl_uString_alloc(nCount);
  74     sal_Unicode * dst = newStr->buffer;
  75     const sal_Unicode * src = inStr.getStr() + startPos;
  76
  77     if (pOffset) {
  78         // Allocate nCount length to offset argument.
  79         pOffset->realloc( nCount );
  80         auto [begin, end] = asNonConstRange(*pOffset);
  81         std::iota(begin, end, startPos);
  82     }
  83
  84
  85     sal_Unicode previousChar = *src ++;
  86     sal_Unicode currentChar;
  87
  88     // One to one mapping
  89     i18nutil::oneToOneMapping aTable(IandE, sizeof(IandE));
  90
  91     // Translation
  92     while (-- nCount > 0) {
  93         currentChar = *src ++;
  94
  95         // the character listed in above table + YA --> the character + A
  96         if (currentChar == 0x30E3 ||   // KATAKANA LETTER SMALL YA
  97                 currentChar == 0x30E4) {   // KATAKANA LETTER YA
  98             if (aTable[ previousChar ] != previousChar) {
  99                 *dst ++ = previousChar;
 100                 *dst ++ = 0x30A2;          // KATAKANA LETTER A
 101                 previousChar = *src ++;
 102                 nCount --;
 103                 continue;
 104             }
 105         }
 106
 107         *dst ++ = previousChar;
 108         previousChar = currentChar;
 109     }
 110
 111     if (nCount == 0) {
 112         *dst ++ = previousChar;
 113     }
 114
 115     *dst = u'\0';
 116
 117     newStr->length = sal_Int32(dst - newStr->buffer);
 118     if (pOffset)
 119         pOffset->realloc(newStr->length);
 120     return OUString(newStr, SAL_NO_ACQUIRE); // take ownership
 121 }
 122
 123 }
 124
 125 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */