/*
 *	aegis - project change supervisor
 *	Copyright (C) 1994, 1999 Peter Miller;
 *	All rights reserved.
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 *	This program is distributed in the hope that it will be useful,
 *	but WITHOUT ANY WARRANTY; without even the implied warranty of
 *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *	GNU General Public License for more details.
 *
 *	You should have received a copy of the GNU General Public License
 *	along with this program; if not, write to the Free Software
 *	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 *
 * MANIFEST: functions to impliment the builtin page_width function
 */

#include <aer/expr.h>
#include <aer/func/page_width.h>
#include <aer/value/integer.h>
#include <error.h>
#include <option.h>


static int page_width_valid _((rpt_expr_ty *));

static int
page_width_valid(ep)
	rpt_expr_ty	*ep;
{
	return (ep->nchild == 0);
}


static rpt_value_ty *page_width_run _((rpt_expr_ty *, size_t, rpt_value_ty **));

static rpt_value_ty *
page_width_run(ep, argc, argv)
	rpt_expr_ty	*ep;
	size_t		argc;
	rpt_value_ty	**argv;
{
	assert(argc == 0);
	return rpt_value_integer(option_page_width_get(-1));
}


rpt_func_ty rpt_func_page_width =
{
	"page_width",
	0, /* not constant */
	page_width_valid,
	page_width_run,
};


static int page_length_valid _((rpt_expr_ty *));

static int
page_length_valid(ep)
	rpt_expr_ty	*ep;
{
	return (ep->nchild == 0);
}


static rpt_value_ty *page_length_run _((rpt_expr_ty *, size_t, rpt_value_ty **));

static rpt_value_ty *
page_length_run(ep, argc, argv)
	rpt_expr_ty	*ep;
	size_t		argc;
	rpt_value_ty	**argv;
{
	assert(argc == 0);
	return rpt_value_integer(option_page_length_get(-1));
}


rpt_func_ty rpt_func_page_length =
{
	"page_length",
	0, /* not constant */
	page_length_valid,
	page_length_run,
};