mblen - Determine number of bytes of a multibyte character

Definition	#include <stdlib.h> int mblen(const char *s, size_t n); mblen returns the number of bytes of a multibyte character to which s points. A maximum of n bytes in s are evaluated.
Return val.	-1 0 1	if n = 0. if s is a NULL pointer or points to a null byte (\0). otherwise.
Note	In this implementation, there are no characters that consist of several bytes. Multibyte characters always have a length of 1.
See also	mbstowcs, mbtowc, wcstombs, wctomb