1 /* 2 * Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <stddef.h> 8 #include <string.h> 9 memcmp(const void * s1,const void * s2,size_t len)10int memcmp(const void *s1, const void *s2, size_t len) 11 { 12 const unsigned char *s = s1; 13 const unsigned char *d = s2; 14 unsigned char sc; 15 unsigned char dc; 16 17 while (len--) { 18 sc = *s++; 19 dc = *d++; 20 if (sc - dc) 21 return (sc - dc); 22 } 23 24 return 0; 25 } 26