/*

 * The Qubes OS Project, http://www.qubes-os.org

 *

 * Copyright (C) 2020 Paweł Marczewski <pawel@invisiblethingslab.com>

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

 *

 */

#include "libqrexec-utils.h"

void do_replace_chars(char *buf, int len) {

    int i;

    unsigned char c;

    for (i = 0; i < len; i++) {

        c = buf[i];

        if ((c < '\040' || c > '\176') &&  /* not printable ASCII */

            (c != '\t') &&                 /* not tab */

            (c != '\n') &&                 /* not newline */

            (c != '\r') &&                 /* not return */

            (c != '\b') &&                 /* not backspace */

            (c != '\a'))                   /* not bell */

            buf[i] = '_';

    }

}