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FUNCTION

	<>---whitespace character predicate

	isspace

	#include 

	int isspace(int <[c]>);

	#include 

	int isspace(<[c]>);

<> is a macro which classifies ASCII integer values by table

lookup.  It is a predicate returning non-zero for whitespace

characters, and 0 for other characters.  It is defined only when <>(<[c]>) is true or <[c]> is EOF.

undefining the macro using `<<#undef isspace>>'.

<> returns non-zero if <[c]> is a space, tab, carriage return, new

line, vertical tab, or formfeed (<<0x09>>--<<0x0D>>, <<0x20>>).

<> is ANSI C.

*/

#include <_ansi.h>

#include 

int

_DEFUN(isspace,(c),int c)

{

	return(__ctype_ptr__[c+1] & _S);

}