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FUNCTION

	<>---blank character predicate

	isblank

	#include 

	int isblank(int <[c]>);

	#include 

	int isblank(<[c]>);

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

lookup.  It is a predicate returning non-zero for blank characters, and 0

for other characters.  It is defined only if <[c]> is representable as an

unsigned char or if <[c]> is EOF.

<> returns non-zero if <[c]> is a blank character.

<> is C99.

*/

#include 

int

_DEFUN(isblank,(c),int c)

{

	return ((__ctype_ptr__[c+1] & _B) || (c == '\t'));

}