/*
 *	aegis - project change supervisor
 *	Copyright (C) 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 change2deltas
 */

#include <change.h>
#include <error.h> /* for assert */
#include <project/history.h>
#include <sub.h>


long
project_change_number_to_delta_number(project_ty *pp, long change_number)
{
    change_ty	    *cp;
    cstate_ty       *cstate_data;
    long	    result;

    cp = change_alloc(pp, change_number);
    change_bind_existing(cp);
    cstate_data = change_cstate_get(cp);
    if (cstate_data->state != cstate_state_completed)
    {
	sub_context_ty	*scp;

	scp = sub_context_new();
	sub_var_set_long(scp, "Number", change_number);
	change_fatal(cp, scp, i18n("change $number not completed"));
	/*NOTREACHED*/
	sub_context_delete(scp);
    }
    result = cstate_data->delta_number;
    assert(result);
    change_free(cp);
    return result;
}
