Function cisalnum

ccan/ccan/str/str.h:110–113

* cisalnum - isalnum() which takes a char (and doesn't accept EOF) * @c: a character * * Surprisingly, the standard ctype.h isalnum() takes an int, which * must have the value of EOF (-1) or an unsigned char. This variant * takes a real char, and doesn't accept EOF. */

 * takes a real char, and doesn't accept EOF.
 */
static inline bool cisalnum(char c)
{
	return isalnum((unsigned char)c);
}
static inline bool cisalpha(char c)
{
	return isalpha((unsigned char)c);