sal/textenc/converter.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 <sal/config.h>
  21
  22 #include <o3tl/safeint.hxx>
  23 #include <rtl/textcvt.h>
  24 #include <sal/types.h>
  25
  26 #include "converter.hxx"
  27 #include "tenchelp.hxx"
  28 #include "unichars.hxx"
  29
  30 sal::detail::textenc::BadInputConversionAction
  31 sal::detail::textenc::handleBadInputTextToUnicodeConversion(
  32     bool bUndefined, bool bMultiByte, char cByte, sal_uInt32 nFlags,
  33     sal_Unicode ** pDestBufPtr, const sal_Unicode * pDestBufEnd, sal_uInt32 * pInfo)
  34 {
  35     *pInfo |= bUndefined
  36         ? (bMultiByte
  37            ? RTL_TEXTTOUNICODE_INFO_MBUNDEFINED
  38            : RTL_TEXTTOUNICODE_INFO_UNDEFINED)
  39         : RTL_TEXTTOUNICODE_INFO_INVALID;
  40     switch (nFlags
  41             & (bUndefined
  42                ? (bMultiByte
  43                   ? RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_MASK
  44                   : RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_MASK)
  45                : RTL_TEXTTOUNICODE_FLAGS_INVALID_MASK))
  46     {
  47     case RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_ERROR:
  48     case RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_ERROR:
  49     case RTL_TEXTTOUNICODE_FLAGS_INVALID_ERROR:
  50         *pInfo |= RTL_TEXTTOUNICODE_INFO_ERROR;
  51         return BAD_INPUT_STOP;
  52
  53     case RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_IGNORE:
  54     case RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_IGNORE:
  55     case RTL_TEXTTOUNICODE_FLAGS_INVALID_IGNORE:
  56         return BAD_INPUT_CONTINUE;
  57
  58     case RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_MAPTOPRIVATE:
  59         if (*pDestBufPtr != pDestBufEnd)
  60         {
  61             *(*pDestBufPtr)++ = RTL_TEXTCVT_BYTE_PRIVATE_START
  62                 | static_cast<unsigned char>(cByte);
  63             return BAD_INPUT_CONTINUE;
  64         }
  65         else
  66             return BAD_INPUT_NO_OUTPUT;
  67
  68     default: // RTL_TEXTTOUNICODE_FLAGS_UNDEFINED_DEFAULT,
  69              // RTL_TEXTTOUNICODE_FLAGS_MBUNDEFINED_DEFAULT,
  70              // RTL_TEXTTOUNICODE_FLAGS_INVALID_DEFAULT
  71         if (*pDestBufPtr != pDestBufEnd)
  72         {
  73             *(*pDestBufPtr)++ = RTL_TEXTENC_UNICODE_REPLACEMENT_CHARACTER;
  74             return BAD_INPUT_CONTINUE;
  75         }
  76         else
  77             return BAD_INPUT_NO_OUTPUT;
  78     }
  79 }
  80
  81 sal::detail::textenc::BadInputConversionAction
  82 sal::detail::textenc::handleBadInputUnicodeToTextConversion(
  83     bool bUndefined, sal_uInt32 nUtf32, sal_uInt32 nFlags, char ** pDestBufPtr,
  84     const char * pDestBufEnd, sal_uInt32 * pInfo, char const * pPrefix,
  85     sal_Size nPrefixLen, bool * pPrefixWritten)
  86 {
  87     // TODO! RTL_UNICODETOTEXT_FLAGS_UNDEFINED_REPLACE
  88     // RTL_UNICODETOTEXT_FLAGS_UNDEFINED_REPLACESTR
  89
  90     char cReplace;
  91
  92     if (bUndefined)
  93     {
  94         if (ImplIsControlOrFormat(nUtf32))
  95         {
  96             if ((nFlags & RTL_UNICODETOTEXT_FLAGS_CONTROL_IGNORE) != 0)
  97                 nFlags = RTL_UNICODETOTEXT_FLAGS_UNDEFINED_IGNORE;
  98         }
  99         else if (ImplIsPrivateUse(nUtf32))
 100         {
 101             if ((nFlags & RTL_UNICODETOTEXT_FLAGS_PRIVATE_IGNORE) != 0)
 102                 nFlags = RTL_UNICODETOTEXT_FLAGS_UNDEFINED_IGNORE;
 103             else if ((nFlags & RTL_UNICODETOTEXT_FLAGS_PRIVATE_MAPTO0) != 0)
 104                 nFlags = RTL_UNICODETOTEXT_FLAGS_UNDEFINED_0;
 105         }
 106         else if (ImplIsZeroWidth(nUtf32))
 107         {
 108             if ((nFlags & RTL_UNICODETOTEXT_FLAGS_NONSPACING_IGNORE) != 0)
 109                 nFlags = RTL_UNICODETOTEXT_FLAGS_UNDEFINED_IGNORE;
 110         }
 111     }
 112     *pInfo |= bUndefined ? RTL_UNICODETOTEXT_INFO_UNDEFINED :
 113                            RTL_UNICODETOTEXT_INFO_INVALID;
 114     switch (nFlags & (bUndefined ? RTL_UNICODETOTEXT_FLAGS_UNDEFINED_MASK :
 115                                    RTL_UNICODETOTEXT_FLAGS_INVALID_MASK))
 116     {
 117     case RTL_UNICODETOTEXT_FLAGS_UNDEFINED_ERROR:
 118     case RTL_UNICODETOTEXT_FLAGS_INVALID_ERROR:
 119         *pInfo |= RTL_UNICODETOTEXT_INFO_ERROR;
 120         return BAD_INPUT_STOP;
 121
 122     case RTL_UNICODETOTEXT_FLAGS_UNDEFINED_IGNORE:
 123     case RTL_UNICODETOTEXT_FLAGS_INVALID_IGNORE:
 124         if (pPrefixWritten)
 125             *pPrefixWritten = false;
 126         return BAD_INPUT_CONTINUE;
 127
 128     case RTL_UNICODETOTEXT_FLAGS_UNDEFINED_0:
 129     case RTL_UNICODETOTEXT_FLAGS_INVALID_0:
 130         cReplace = 0;
 131         break;
 132
 133     case RTL_UNICODETOTEXT_FLAGS_UNDEFINED_QUESTIONMARK:
 134     case RTL_UNICODETOTEXT_FLAGS_INVALID_QUESTIONMARK:
 135     default: // RTL_UNICODETOTEXT_FLAGS_UNDEFINED_DEFAULT,
 136              // RTL_UNICODETOTEXT_FLAGS_INVALID_DEFAULT
 137         cReplace = '?';
 138         break;
 139
 140     case RTL_UNICODETOTEXT_FLAGS_UNDEFINED_UNDERLINE:
 141     case RTL_UNICODETOTEXT_FLAGS_INVALID_UNDERLINE:
 142         cReplace = '_';
 143         break;
 144     }
 145     if (o3tl::make_unsigned(pDestBufEnd - *pDestBufPtr) > nPrefixLen)
 146     {
 147         while (nPrefixLen-- > 0)
 148             *(*pDestBufPtr)++ = *pPrefix++;
 149         *(*pDestBufPtr)++ = cReplace;
 150         if (pPrefixWritten)
 151             *pPrefixWritten = true;
 152         return BAD_INPUT_CONTINUE;
 153     }
 154     return BAD_INPUT_NO_OUTPUT;
 155 }
 156
 157 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */