utf.h File Reference

Unicode Transformation Format. More...

#include "a.h"

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Functions
unsigned int	a_utf_encode (a_u32 val, void *buf)
	encode one unicode code point into UTF-8
unsigned int	a_utf_decode (void const *ptr, a_size num, a_u32 *val)
	decode one unicode code point from UTF-8
a_size	a_utf_length (void const *ptr, a_size num, a_size *stop)
	number of unicode code points in a UTF-8 encoded byte sequence
a_size	a_utf_length_ (void const *ptr, a_size num)

Detailed Description

Unicode Transformation Format.

Unicode	UTF-8
U+0000000 ~ U+0000007F	0XXXXXXX
U+0000080 ~ U+000007FF	110XXXXX 10XXXXXX
U+0000800 ~ U+0000FFFF	1110XXXX 10XXXXXX 10XXXXXX
U+0010000 ~ U+001FFFFF	11110XXX 10XXXXXX 10XXXXXX 10XXXXXX
U+0200000 ~ U+03FFFFFF	111110XX 10XXXXXX 10XXXXXX 10XXXXXX 10XXXXXX
U+4000000 ~ U+7FFFFFFF	1111110X 10XXXXXX 10XXXXXX 10XXXXXX 10XXXXXX 10XXXXXX