mblen(3C)						   Standard C Library Functions 						 mblen(3C)

NAME

       mblen - get number of bytes in a character

SYNOPSIS

       #include <stdlib.h>

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

DESCRIPTION

       If s is not a null pointer, mblen() determines the number of bytes constituting the character pointed to by s. It is equivalent to:

	      mbtowc((wchar_t *)0, s, n);

       A call with s as a null pointer causes this function to return 0. The behavior of this function is affected by the LC_CTYPE category of the
       current locale.

RETURN VALUES

       If s is a null pointer, mblen() returns 0. It s is not a null pointer, mblen() returns 0 (if s points to the  null  byte),  the	number	of
       bytes  that  constitute the character (if the next n or fewer bytes form a valid character), or	-1 (if they do not form a valid character)
       and may set errno to indicate the error. In no case will the value returned be greater than n or the value of the MB_CUR_MAX macro.

ERRORS

       The mblen() function may fail if:

       EILSEQ	       Invalid character sequence is detected.

USAGE

       The mblen() function can be used safely in multithreaded applications, as long as setlocale(3C) is not being called to change the locale.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe with exceptions	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mbstowcs(3C), mbtowc(3C), setlocale(3C), wcstombs(3C), wctomb(3C), attributes(5), standards(5)

SunOS 5.10							    24 Jul 2002 							 mblen(3C)