lib/crtdll/string/memmove.c

   1 #include <crtdll/string.h>
   2
   3
   4 void * memmove(void *dest,const void *src,size_t count)
   5 {
   6     char *char_dest = (char *)dest;
   7     char *char_src = (char *)src;
   8
   9     if ((char_dest <= char_src) || (char_dest >= (char_src+count)))
  10     {
  11         /*  non-overlapping buffers */
  12         while(count > 0)
  13         {
  14             *char_dest = *char_src;
  15             char_dest++;
  16             char_src++;
  17             count--;
  18         }
  19     }
  20     else
  21     {
  22         /* overlaping buffers */
  23         char_dest = (char *)dest + count - 1;
  24         char_src = (char *)src + count - 1;
  25
  26         while(count > 0)
  27         {
  28            *char_dest = *char_src;
  29            char_dest--;
  30            char_src--;
  31            count--;
  32         }
  33     }
  34
  35     return dest;
  36 }