src/romanization.hxx

   1 #ifndef _ROMANIZATION_HXX
   2 #define _ROMANIZATION_HXX
   3
   4 #include <string>
   5 #include <vector>
   6 #include "utils.hxx"
   7
   8 /*
   9 http://www.unicode.org/charts/unihangridindex.html
  10 */
  11
  12
  13 using std::string;
  14 using std::vector;
  15
  16 class Romanization
  17 {
  18   public:
  19     Romanization();
  20     ~Romanization(){};
  21
  22     struct RmnElement {
  23       vector<string> romaji;
  24       string hiragana;
  25       string katakana;
  26     };
  27     // https://en.wikipedia.org/wiki/CJK_Unified_Ideographs#CJK_Unified_Ideographs
  28     inline static bool is_cjk_base (unsigned int ucs) {return ucs>=0x4e00 && ucs<=0x9fff;}
  29     inline static bool is_cjk_a    (unsigned int ucs) {return ucs>=0x3400 && ucs<=0x4dbf;}
  30     inline static bool is_cjk_b    (unsigned int ucs) {return ucs>=0x20000 && ucs<=0x2a6df;}
  31     inline static bool is_cjk_c    (unsigned int ucs) {return ucs>=0x2a700 && ucs<=0x2b73f;}
  32     inline static bool is_cjk_d    (unsigned int ucs) {return ucs>=0x2b740 && ucs<=0x2b81f;}
  33     // range U+1B000 - U+1B0FF is both hiragana ans katakana
  34     inline static bool is_hiragana (unsigned int ucs) {return ucs>=0x3040 && ucs<=0x309f;}
  35     inline static bool is_katakana (unsigned int ucs) {return ucs>=0x30a0 && ucs<=0xffef;}
  36     inline static bool is_kana     (unsigned int ucs) {return is_hiragana(ucs) || is_katakana(ucs);}
  37     inline static bool is_cjk      (unsigned int ucs)
  38       {return is_cjk_base(ucs) || is_cjk_a(ucs) || is_cjk_b(ucs) || is_cjk_c(ucs) || is_cjk_d(ucs);}
  39
  40
  41     string romaji_to_kana ( const string &rmj, bool to_hiragana = true );
  42     inline string romaji_to_kana ( const char *rmj, bool to_hiragana = true )
  43       { return romaji_to_kana(string(rmj),to_hiragana); };
  44
  45     inline string romaji_to_hiragana ( const char *s )
  46       { return romaji_to_kana(string(s),true);  };
  47     inline string romaji_to_hiragana ( const string &s )
  48       { return romaji_to_kana(s,true);  };
  49
  50     inline string romaji_to_katakana ( const char *s )
  51       { return romaji_to_kana(string(s),false); };
  52     inline string romaji_to_katakana ( const string &s )
  53       { return romaji_to_kana(s,false); };
  54
  55     inline string hiragana_to_katakana ( const string &s );
  56
  57     string kana_to_romaji ( const string &k );
  58
  59     static inline bool contains_kanji ( const char *s )
  60     {
  61       for( unsigned int code: utils::utf8_to_ints(s) )
  62         if ( is_cjk(code) )
  63           return true;
  64       return false;
  65     };
  66
  67     static inline bool is_kanji ( const char *s )
  68     {
  69       for ( unsigned int code: utils::utf8_to_ints(s) )
  70         if ( !is_cjk(code) )
  71           return false;
  72       return true;
  73     };
  74
  75     static inline bool is_kanji ( int code ) { return is_cjk(code);};
  76
  77   private:
  78     vector<RmnElement> table_;
  79     size_t current_romaji_;
  80     vector<string> romaji_names_; // names of available romanization systems
  81     string tsu_h_;
  82     string tsu_k_;
  83     // TODO: bude potreba pro kazdy system zvlast
  84     vector<string> tsus_;
  85
  86 };
  87
  88
  89 #endif // _ROMANIZATION_HXX