ultrix man page for mblen

mblen(3int)															       mblen(3int)

Name
       mblen - determines the number of bytes comprising a multibyte character

Syntax
       #include <stdlib.h>

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

Arguments
       s       The s argument is a pointer to the multibyte character string.

       n       The n argument is the maximum number of bytes in s that are examined.

Description
       If  s  is not a null pointer, the function determines the number of bytes comprising the multibyte character pointed to by s.  The function
       is equivalent to:
       (mbtowc((wchar_t *)0, s, n);)

       This function is affected by the LC_CTYPE category of the current locale.

Return Values
       If s is a null pointer, the function returns a zero value.  If s is not a null pointer, the function returns:

	  o  0 (if s points to the null character)

	  o  The number of bytes that comprise the multibyte character (if the next n or fewer bytes form a valid multibyte character)

	  o
	      -1 (if they do not form a valid multibyte character)

See Also
       mbtowc(3int), mbstowcs(3int), setlocale(3int), wctomb(3int), wcstombs(3int)

																       mblen(3int)