ref: 3b886fcd3ec063d39ad3f8a16cb7eb08576102ec
dir: /gui-win32/r16.h/
typedef unsigned short Rune16; wchar_t *widen(char *s); char *narrowen(wchar_t *ws); int widebytes(wchar_t *ws); int runes16len(Rune16*); int rune16nlen(Rune16*, int); Rune16* runes16dup(Rune16*); Rune16* utftorunes16(Rune16*, char*, int); char* runes16toutf(char*, Rune16*, int); int runes16cmp(Rune16*, Rune16*);