src/functional/string_memcpy.c

   1 #include <string.h>
   2 #include <stdlib.h>
   3 #include <stdint.h>
   4 #include "test.h"
   5
   6 static char buf[512];
   7
   8 static void *(*volatile pmemcpy)(void *restrict, const void *restrict, size_t);
   9
  10 static void *aligned(void *p) {
  11         return (void*)(((uintptr_t)p + 63) & -64);
  12 }
  13
  14 #define N 80
  15 static void test_align(int dalign, int salign, int len)
  16 {
  17         char *src = aligned(buf);
  18         char *dst = aligned(buf + 128);
  19         char *want = aligned(buf + 256);
  20         char *p;
  21         int i;
  22
  23         if (salign + len > N || dalign + len > N)
  24                 abort();
  25         for (i = 0; i < N; i++) {
  26                 src[i] = '#';
  27                 dst[i] = want[i] = ' ';
  28         }
  29         for (i = 0; i < len; i++)
  30                 src[salign+i] = want[dalign+i] = '0'+i;
  31         p = pmemcpy(dst+dalign, src+salign, len);
  32         if (p != dst+dalign)
  33                 t_error("memcpy(%p,...) returned %p\n", dst+dalign, p);
  34         for (i = 0; i < N; i++)
  35                 if (dst[i] != want[i]) {
  36                         t_error("memcpy(align %d, align %d, %d) failed\n", dalign, salign, len);
  37                         t_printf("got : %.*s\n", dalign+len+1, dst);
  38                         t_printf("want: %.*s\n", dalign+len+1, want);
  39                         break;
  40                 }
  41 }
  42
  43 int main(void)
  44 {
  45         int i,j,k;
  46
  47         pmemcpy = memcpy;
  48
  49         for (i = 0; i < 16; i++)
  50                 for (j = 0; j < 16; j++)
  51                         for (k = 0; k < 64; k++)
  52                                 test_align(i,j,k);
  53
  54         return t_status;
  55 }