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/*

/*

FUNCTION

FUNCTION

<<islower>>---lower-case character predicate

<<islower>>---lower-case character predicate

INDEX

INDEX

islower

islower

ANSI_SYNOPSIS

ANSI_SYNOPSIS

#include <ctype.h>

#include <ctype.h>

int islower(int <[c]>);

int islower(int <[c]>);

TRAD_SYNOPSIS

TRAD_SYNOPSIS

#include <ctype.h>

#include <ctype.h>

int islower(<[c]>);

int islower(<[c]>);

DESCRIPTION

DESCRIPTION

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

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

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

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

(lower-case alphabetic characters), and 0 for other characters.

(lower-case alphabetic characters), and 0 for other characters.

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

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

You can use a compiled subroutine instead of the macro definition by

You can use a compiled subroutine instead of the macro definition by

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

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

RETURNS

RETURNS

<<islower>> returns non-zero if <[c]> is a lower case letter (<<a>>--<<z>>).

<<islower>> returns non-zero if <[c]> is a lower case letter (<<a>>--<<z>>).

PORTABILITY

PORTABILITY

<<islower>> is ANSI C.

<<islower>> is ANSI C.

No supporting OS subroutines are required.

No supporting OS subroutines are required.

*/

*/

#include <_ansi.h>

#include <_ansi.h>

#include <ctype.h>

#include <ctype.h>

#undef islower

#undef islower

int

int

_DEFUN(islower,(c),int c)

_DEFUN(islower,(c),int c)

{

{

        return((_ctype_ + 1)[c] & _L);

        return((_ctype_ + 1)[c] & _L);

}

}