//
// aegis - project change supervisor
// Copyright (C) 2002-2008, 2014 Peter Miller
//
// 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 3 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, see <http://www.gnu.org/licenses/>.
//

#include <libaegis/change/branch.h>
#include <common/fstrcmp.h>
#include <libaegis/sub.h>


long
change_history_change_by_delta(const change::pointer &cp, long delta_number)
{
    cstate_ty       *cstate_data;
    cstate_branch_history_list_ty *h;
    size_t          j;
    sub_context_ty  *scp;

    cstate_data = cp->cstate_get();
    if (!cstate_data->branch)
        goto useless;
    h = cstate_data->branch->history;
    if (!h)
        goto useless;
    if (!h->length)
        goto useless;
    for (j = 0; j < h->length; ++j)
    {
        cstate_branch_history_ty *he;

        he = h->list[j];
        if (he->delta_number == delta_number)
            return he->change_number;
    }

    useless:
    scp = sub_context_new();
    sub_var_set_long(scp, "Number", delta_number);
    change_fatal(cp, scp, i18n("no delta $number"));
    // NOTREACHED
    sub_context_delete(scp);
    return 0;
}


// vim: set ts=8 sw=4 et :