4 * Copyright (C) 2017 Aleksandar Andrejevic <theflash@sdf.lonestar.org>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU Affero General Public License as
8 * published by the Free Software Foundation, either version 3 of the
9 * License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Affero General Public License for more details.
16 * You should have received a copy of the GNU Affero General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 return c >= 0x20 && c <= 0x7E;
29 return c >= '0' && c <= '9';
34 return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
39 return strchr(" \t\n\v\f\r", c) != NULL;
44 if (c >= 'A' && c <= 'Z') c += 'a' - 'A';
50 if (c >= 'a' && c <= 'z') c -= 'a' - 'A';