memcmp.c (1127B)
1 /* -*-comment-start: "//";comment-end:""-*- 2 * GNU Mes --- Maxwell Equations of Software 3 * Copyright © 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 <string.h> 22 23 int 24 memcmp (void const *s1, void const *s2, size_t size) 25 { 26 if (size == 0) 27 return 0; 28 29 char const *a = s1; 30 char const *b = s2; 31 32 while (a[0] == b[0] && size > 1) 33 { 34 size = size - 1; 35 a = a + 1; 36 b = b + 1; 37 } 38 39 return a[0] - b[0]; 40 }