Function hex2chr

hex-ll.h:14–18

* Convert two consecutive hexadecimal digits into a char. Return a * negative value on error. Don't run over the end of short strings. */

 * negative value on error.  Don't run over the end of short strings.
 */
static inline int hex2chr(const char *s)
{
	unsigned int val = hexval(s[0]);
	return (val & ~0xf) ? val : (val << 4) | hexval(s[1]);
}

/*
 * Read `len` pairs of hexadecimal digits from `hex` and write the