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FUNCTION

<>---punctuation character predicate

ispunct

#include 

int ispunct(int <[c]>);

#include 

int ispunct(<[c]>);

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

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

punctuation characters, and 0 for other characters.  It is defined

only when <>(<[c]>) is true or <[c]> is EOF.

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

<> returns non-zero if <[c]> is a printable punctuation character

(<) && !isalnum(<[c]>)>>).

<> is ANSI C.

*/

#include 

int

_DEFUN(ispunct,(c),int c)

{

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

}