tools/source/reversemap/bestreversemap.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
  10 #include <sal/config.h>
  11 #include <rtl/textcvt.h>
  12
  13 #include <cstdlib>
  14 #include <stdio.h>
  15
  16 namespace {
  17
  18 struct Encoder
  19 {
  20     rtl_UnicodeToTextConverter m_aConverter;
  21     bool m_bCapable;
  22     const char *m_pEncoding;
  23     Encoder(rtl_TextEncoding nEncoding, const char *pEncoding)
  24         : m_aConverter(rtl_createUnicodeToTextConverter(nEncoding))
  25         , m_bCapable(true)
  26         , m_pEncoding(pEncoding)
  27     {
  28     }
  29     ~Encoder()
  30     {
  31         rtl_destroyUnicodeToTextConverter(m_aConverter);
  32     }
  33     void checkSupports(sal_Unicode c)
  34     {
  35         char aTempArray[8];
  36         sal_Size nTempSize;
  37         sal_uInt32 nCvtInfo;
  38
  39         sal_Size nChars = rtl_convertUnicodeToText(m_aConverter,
  40             nullptr, &c, 1, aTempArray, sizeof(aTempArray),
  41               RTL_UNICODETOTEXT_FLAGS_UNDEFINED_ERROR |  RTL_UNICODETOTEXT_FLAGS_INVALID_ERROR,
  42              &nCvtInfo, &nTempSize);
  43         m_bCapable = nChars > 0;
  44     }
  45     void reset()
  46     {
  47         m_bCapable = true;
  48     }
  49     bool isOK() const
  50     {
  51         return m_bCapable;
  52     }
  53     const char* getName() const
  54     {
  55         return m_pEncoding;
  56     }
  57
  58 };
  59
  60 }
  61
  62 int main()
  63 {
  64 #   define EXP(x) Encoder(x, #x)
  65
  66     Encoder aConverters[15] =
  67     {
  68         EXP(RTL_TEXTENCODING_MS_1361),
  69         EXP(RTL_TEXTENCODING_MS_950),
  70         EXP(RTL_TEXTENCODING_MS_949),
  71         EXP(RTL_TEXTENCODING_MS_936),
  72         EXP(RTL_TEXTENCODING_MS_932),
  73         EXP(RTL_TEXTENCODING_MS_874),
  74         EXP(RTL_TEXTENCODING_MS_1258),
  75         EXP(RTL_TEXTENCODING_MS_1257),
  76         EXP(RTL_TEXTENCODING_MS_1256),
  77         EXP(RTL_TEXTENCODING_MS_1255),
  78         EXP(RTL_TEXTENCODING_MS_1254),
  79         EXP(RTL_TEXTENCODING_MS_1253),
  80         EXP(RTL_TEXTENCODING_MS_1251),
  81         EXP(RTL_TEXTENCODING_MS_1250),
  82         EXP(RTL_TEXTENCODING_MS_1252)
  83     };
  84
  85     printf("//Do not edit manually, generated from bestreversemap.cxx\n");
  86     printf("#include <rtl/textenc.h>\n");
  87     printf("#include <tools/tenccvt.hxx>\n");
  88     printf("rtl_TextEncoding getBestMSEncodingByChar(sal_Unicode c)\n");
  89     printf("{\n");
  90
  91     sal_Unicode c = 0;
  92     while (c < 0xFFFF)
  93     {
  94         for (size_t i = 0; i < SAL_N_ELEMENTS(aConverters); ++i)
  95             aConverters[i].reset();
  96
  97         int nMostCapable = -1;
  98
  99         while(c < 0xFFFF)
 100         {
 101             bool bSomethingCapable = false;
 102             for (size_t i = 0; i < SAL_N_ELEMENTS(aConverters); ++i)
 103             {
 104                 if (aConverters[i].isOK())
 105                     aConverters[i].checkSupports(c);
 106                 if (aConverters[i].isOK())
 107                 {
 108                     bSomethingCapable = true;
 109                     nMostCapable = i;
 110                 }
 111             }
 112             if (!bSomethingCapable)
 113                 break;
 114             ++c;
 115         }
 116         sal_Unicode cEnd = c;
 117         printf("    if (c < 0x%x)\n", c);
 118         printf("        return %s;\n", aConverters[nMostCapable].getName());
 119         while(c < 0xFFFF)
 120         {
 121             bool bNothingCapable = true;
 122             for (size_t i = 0; i < SAL_N_ELEMENTS(aConverters); ++i)
 123             {
 124                 aConverters[i].checkSupports(c);
 125                 if (aConverters[i].isOK())
 126                 {
 127                     bNothingCapable = false;
 128                     break;
 129                 }
 130             }
 131             if (!bNothingCapable)
 132                 break;
 133             ++c;
 134         }
 135         if (cEnd != c)
 136         {
 137             if (c < 0xFFFF)
 138             {
 139                 printf("    if (c < 0x%x)\n", c);
 140                 printf("        return RTL_TEXTENCODING_DONTKNOW;\n");
 141             }
 142             else
 143                 printf("    return RTL_TEXTENCODING_DONTKNOW;\n");
 144         }
 145     }
 146
 147     printf("}\n");
 148     fflush(stdout);
 149
 150     return EXIT_SUCCESS;
 151 }
 152
 153 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */