boot/compressed/string.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * arch/mips/boot/compressed/string.c
0004  *
0005  * Very small subset of simple string routines
0006  */
0007
0008 #include <linux/compiler_attributes.h>
0009 #include <linux/types.h>
0010
0011 void *memcpy(void *dest, const void *src, size_t n)
0012 {
0013     int i;
0014     const char *s = src;
0015     char *d = dest;
0016
0017     for (i = 0; i < n; i++)
0018         d[i] = s[i];
0019     return dest;
0020 }
0021
0022 void *memset(void *s, int c, size_t n)
0023 {
0024     int i;
0025     char *ss = s;
0026
0027     for (i = 0; i < n; i++)
0028         ss[i] = c;
0029     return s;
0030 }
0031
0032 void * __weak memmove(void *dest, const void *src, size_t n)
0033 {
0034     unsigned int i;
0035     const char *s = src;
0036     char *d = dest;
0037
0038     if ((uintptr_t)dest < (uintptr_t)src) {
0039         for (i = 0; i < n; i++)
0040             d[i] = s[i];
0041     } else {
0042         for (i = n; i > 0; i--)
0043             d[i - 1] = s[i - 1];
0044     }
0045     return dest;
0046 }