1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * arch/mips/boot/compressed/string.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Very small subset of simple string routines
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/compiler_attributes.h>
9*4882a593Smuzhiyun #include <linux/types.h>
10*4882a593Smuzhiyun
memcpy(void * dest,const void * src,size_t n)11*4882a593Smuzhiyun void *memcpy(void *dest, const void *src, size_t n)
12*4882a593Smuzhiyun {
13*4882a593Smuzhiyun int i;
14*4882a593Smuzhiyun const char *s = src;
15*4882a593Smuzhiyun char *d = dest;
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun for (i = 0; i < n; i++)
18*4882a593Smuzhiyun d[i] = s[i];
19*4882a593Smuzhiyun return dest;
20*4882a593Smuzhiyun }
21*4882a593Smuzhiyun
memset(void * s,int c,size_t n)22*4882a593Smuzhiyun void *memset(void *s, int c, size_t n)
23*4882a593Smuzhiyun {
24*4882a593Smuzhiyun int i;
25*4882a593Smuzhiyun char *ss = s;
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun for (i = 0; i < n; i++)
28*4882a593Smuzhiyun ss[i] = c;
29*4882a593Smuzhiyun return s;
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun
memmove(void * dest,const void * src,size_t n)32*4882a593Smuzhiyun void * __weak memmove(void *dest, const void *src, size_t n)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun unsigned int i;
35*4882a593Smuzhiyun const char *s = src;
36*4882a593Smuzhiyun char *d = dest;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun if ((uintptr_t)dest < (uintptr_t)src) {
39*4882a593Smuzhiyun for (i = 0; i < n; i++)
40*4882a593Smuzhiyun d[i] = s[i];
41*4882a593Smuzhiyun } else {
42*4882a593Smuzhiyun for (i = n; i > 0; i--)
43*4882a593Smuzhiyun d[i - 1] = s[i - 1];
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun return dest;
46*4882a593Smuzhiyun }
47