reactos/sdk/lib/crt/mem/memmove.c
2021-12-28 01:55:38 +03:00

41 lines
880 B
C

#include <string.h>
#if defined(_MSC_VER) && (_MSC_VER >= 1910 || !defined(_WIN64))
#pragma function(memmove)
#endif /* _MSC_VER */
/* NOTE: This code is duplicated in memcpy function */
void * __cdecl memmove(void *dest,const void *src,size_t count)
{
char *char_dest = (char *)dest;
char *char_src = (char *)src;
if ((char_dest <= char_src) || (char_dest >= (char_src+count)))
{
/* non-overlapping buffers */
while(count > 0)
{
*char_dest = *char_src;
char_dest++;
char_src++;
count--;
}
}
else
{
/* overlaping buffers */
char_dest = (char *)dest + count - 1;
char_src = (char *)src + count - 1;
while(count > 0)
{
*char_dest = *char_src;
char_dest--;
char_src--;
count--;
}
}
return dest;
}