/*
 *	aegis - project change supervisor
 *	Copyright (C) 1997, 2002, 2003 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 basename tree nodes
 */

#include <ac/stdio.h>
#include <ac/string.h>

#include <aer/value/string.h>
#include <function/basename.h>
#include <function/needs.h>
#include <str.h>
#include <tree/list.h>
#include <tree/monadic.h>


static rpt_value_ty *
evaluate(tree_ty *tp, string_ty *path, struct stat *st)
{
    tree_monadic_ty *this_thing;
    rpt_value_ty    *vp;
    rpt_value_ty    *svp;
    rpt_value_ty    *result;
    string_ty	    *s;
    char	    *cp;

    this_thing = (tree_monadic_ty *)tp;
    vp = tree_evaluate(this_thing->arg, path, st);
    svp = rpt_value_stringize(vp);
    rpt_value_free(vp);

    s = rpt_value_string_query(svp);
    cp = strrchr(s->str_text, '/');
    if (cp)
	++cp;
    else
	cp = s->str_text;
    s = str_from_c(cp);
    rpt_value_free(svp);

    result = rpt_value_string(s);
    str_free(s);
    return result;
}


static tree_method_ty method =
{
    sizeof(tree_monadic_ty),
    "basename",
    tree_monadic_destructor,
    tree_monadic_print,
    evaluate,
    tree_monadic_useful,
    tree_monadic_constant,
    tree_monadic_optimize,
};


tree_ty *
function_basename(tree_list_ty *args)
{
    function_needs_one("basename", args);
    return tree_monadic_new(&method, args->item[0]);
}
