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