__mes_debug.c (1131B)
1 /* -*-comment-start: "//";comment-end:""-*- 2 * GNU Mes --- Maxwell Equations of Software 3 * Copyright © 2016,2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org> 4 * 5 * This file is part of GNU Mes. 6 * 7 * GNU Mes is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 3 of the License, or (at 10 * your option) any later version. 11 * 12 * GNU Mes is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with GNU Mes. If not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #include "mes/lib.h" 22 #include <stdlib.h> 23 24 #define MAX(a, b) (((a) > (b)) ? (a) : (b)) 25 26 int 27 __mes_debug () 28 { 29 static int __mes_debug = -1; 30 if (__mes_debug == -1) 31 { 32 char *p = getenv ("MES_DEBUG"); 33 __mes_debug = p ? MAX (atoi (p), 1) : 0; 34 } 35 return __mes_debug; 36 }