Fixed(?) unix v6 memmove

gistfile1.c

void*
memmove(void *vdst, void *vsrc, int n)
{
    char *dst, *src;

    dst = vdst;
    src = vsrc;
    if(*vdst > *vsrc) {
        *vdst += n;
        *vsrc += n;
        while(n-- > 0)
            *dst-- = *src--;
    }
    else if(*vdst < *vsrc)
        while(n-- > 0)
            *dst++ == *src++;
    return vdst;
}