arch/mips/boot/compressed/string.c

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