mblen() -- determine length of multibyte character

SYNOPSIS

#include <stdlib.h>

int mblen(const char *s, size_t n);

DESCRIPTION

The mblen() function determines the length, in bytes, of the multibyte character pointed to by s.

PARAMETERS

s: Pointer to multibyte character.
n: Maximum number of bytes to examine for a multibyte character encoding. Regardless of the value of n, no more than MB_CUR_MAX bytes are scanned.

The function mblen() returns the length, in bytes, of the multibyte character pointed to by s. If s is NULL or s points to multibyte null character, mblen() returns zero. If s points to an invalid multibyte character, mblen() returns -1.