-
-vsize
-utf8_char_len (char current)
-{
- vsize char_len = 1;
-
- // U+10000 - U+10FFFF
- if ((current & 0xF0) == 0xF0)
- char_len = 4;
- // U+0800 - U+FFFF
- else if ((current & 0xE0) == 0xE0)
- char_len = 3;
- // U+0080 - U+07FF
- else if ((current & 0xC0) == 0xC0)
- char_len = 2;
- else if (current & 0x80)
- programming_error ("invalid UTF-8 string");
-
- return char_len;
-}