lib/ntdll/string/memmove.c

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