ACE/ace/Encoding_Converter_Factory.cpp

   1 #include "ace/Encoding_Converter_Factory.h"
   2
   3 #if defined (ACE_USES_WCHAR)
   4 #include "ace/UTF32_Encoding_Converter.h"
   5 #include "ace/UTF16_Encoding_Converter.h"
   6 #include "ace/UTF8_Encoding_Converter.h"
   7 #include "ace/OS_Memory.h"
   8
   9 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
  10
  11 ACE_Encoding_Converter*
  12 ACE_Encoding_Converter_Factory::create (
  13                        const ACE_Byte* source,
  14                        size_t source_size,
  15                        ACE_Encoding_Converter_Factory::Encoding_Hint hint)
  16 {
  17 #if defined (ACE_BIG_ENDIAN)
  18   bool const convert_for_bigendian = true;
  19 #else
  20   bool const convert_for_bigendian = false;
  21 #endif /* ACE_BIG_ENDIAN */
  22   ACE_Encoding_Converter* converter = 0;
  23
  24   switch (hint)
  25     {
  26     case ACE_UTF_32BE:
  27       ACE_NEW_RETURN (converter,
  28                       ACE_UTF32_Encoding_Converter (!convert_for_bigendian),
  29                       0);
  30       break;
  31     case ACE_UTF_32LE:
  32       ACE_NEW_RETURN (converter,
  33                       ACE_UTF32_Encoding_Converter (convert_for_bigendian),
  34                       0);
  35       break;
  36     case ACE_UTF_16BE:
  37       ACE_NEW_RETURN (converter,
  38                       ACE_UTF16_Encoding_Converter (!convert_for_bigendian),
  39                       0);
  40       break;
  41     case ACE_UTF_16LE:
  42       ACE_NEW_RETURN (converter,
  43                       ACE_UTF16_Encoding_Converter (convert_for_bigendian),
  44                       0);
  45       break;
  46     case ACE_UTF_8:
  47       ACE_NEW_RETURN (converter,
  48                       ACE_UTF8_Encoding_Converter,
  49                       0);
  50       break;
  51     default:
  52       // First check for ASCII since much of ASCII text will appear to
  53       // convert from UTF-16 to UTF-8.
  54       converter = ACE_UTF8_Encoding_Converter::encoded (source, source_size);
  55       if (converter != 0)
  56         return converter;
  57
  58       // Check for UTF-32
  59       converter = ACE_UTF32_Encoding_Converter::encoded (source, source_size);
  60       if (converter != 0)
  61         return converter;
  62
  63       // Check for UTF-16
  64       converter = ACE_UTF16_Encoding_Converter::encoded (source, source_size);
  65       if (converter != 0)
  66         return converter;
  67     }
  68
  69   return converter;
  70 }
  71
  72 ACE_END_VERSIONED_NAMESPACE_DECL
  73 #endif /* ACE_USES_WCHAR */