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/*

FUNCTION

	<>---character string length

INDEX

	strnlen

ANSI_SYNOPSIS

	#include 

	size_t strnlen(const char *<[str]>, size_t <[n]>);

TRAD_SYNOPSIS

	#include 

	size_t strnlen(<[str]>, <[n]>)

	char *<[src]>;

	size_t <[n]>;

DESCRIPTION

	The <> function works out the length of the string

	starting at <<*<[str]>>> by counting chararacters until it

	reaches a NUL character or the maximum: <[n]> number of

        characters have been inspected.

RETURNS

	<> returns the character count or <[n]>.

PORTABILITY

<> is a GNU extension.

<> requires no supporting OS subroutines.

*/

#undef __STRICT_ANSI__

#include <_ansi.h>

#include 

size_t

_DEFUN (strnlen, (str, n),

	_CONST char *str _AND

	size_t n)

{

  _CONST char *start = str;

  while (n-- > 0 && *str)

    str++;

  return str - start;

}