/*
 *	aegis - project change supervisor
 *	Copyright (C) 2002 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 manipulate capitalizes
 */

#include <aer/expr.h>
#include <aer/func/capitalize.h>
#include <aer/value/error.h>
#include <aer/value/integer.h>
#include <aer/value/string.h>
#include <error.h>
#include <mem.h>
#include <sub.h>


static int
verify(rpt_expr_ty *ep)
{
    return (ep->nchild == 1);
}


static rpt_value_ty *
run(rpt_expr_ty *ep, size_t argc, rpt_value_ty **argv)
{
    rpt_value_ty    *arg;
    rpt_value_ty    *result;
    string_ty       *subject;
    string_ty       *s;

    arg = argv[0];
    assert(arg->method->type != rpt_value_type_error);
    arg = rpt_value_stringize(arg);
    if (arg->method->type != rpt_value_type_string)
    {
	sub_context_ty	*scp;

	scp = sub_context_new();
	rpt_value_free(arg);
	sub_var_set_charstar(scp, "Function", "capitalize");
	sub_var_set_charstar(scp, "Number", "1");
	sub_var_set_charstar(scp, "Name", argv[0]->method->name);
	s =
	    subst_intl
	    (
	       	scp,
i18n("$function: argument $number: string value required (was given $name)")
	    );
	sub_context_delete(scp);
	result = rpt_value_error(ep->pos, s);
	str_free(s);
	return result;
    }
    subject = str_copy(rpt_value_string_query(arg));
    rpt_value_free(arg);

    /*
     * build the result
     */
    s = str_capitalize(subject);
    str_free(subject);
    result = rpt_value_string(s);
    str_free(s);
    return result;
}


rpt_func_ty rpt_func_capitalize =
{
    "capitalize",
    1, /* optimizable */
    verify,
    run
};
