isdigit.c (972B)
1 /* -*-comment-start: "//";comment-end:""-*- 2 * GNU Mes --- Maxwell Equations of Software 3 * Copyright © 2016,2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org> 4 * Copyright © 2023 Rick Masters <grick23@gmail.com> 5 * 6 * This file is part of GNU Mes. 7 * 8 * GNU Mes is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 3 of the License, or (at 11 * your option) any later version. 12 * 13 * GNU Mes is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with GNU Mes. If not, see <http://www.gnu.org/licenses/>. 20 */ 21 22 #include <mes/lib.h> 23 24 int 25 isdigit (int c) 26 { 27 return c >= '0' && c <= '9'; 28 }