1 /* 2 * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <stddef.h> 8 9 int memcmp(const void *s1, const void *s2, size_t len) 10 { 11 const unsigned char *s = s1; 12 const unsigned char *d = s2; 13 unsigned char sc; 14 unsigned char dc; 15 16 while (len--) { 17 sc = *s++; 18 dc = *d++; 19 if (sc - dc) 20 return (sc - dc); 21 } 22 23 return 0; 24 } 25