/*
 * memcpy - copy bytes
 */

#include "config.h"

VOIDSTAR
memcpy(dst, src, size)
VOIDSTAR dst;
CONST VOIDSTAR src;
SIZET size;
{
        register char *d;
        register CONST char *s;
        register SIZET n;

        if (size <= 0)
                return(dst);

        s = src;
        d = dst;
        if (s <= d && s + (size-1) >= d) {
                /* Overlap, must copy right-to-left. */
                s += size-1;
                d += size-1;
                for (n = size; n > 0; n--)
                        *d-- = *s--;
        } else
                for (n = size; n > 0; n--)
                        *d++ = *s++;

        return(dst);
}

/*
 - bcopy - Berklix equivalent of memcpy
 */

void
bcopy(src, dst, length)
CONST char *src;
char *dst;
int length;
{
        /*(void)*/ memcpy((VOIDSTAR)dst, (CONST VOIDSTAR)src, (SIZET)length);
}


VOIDSTAR
memmove(dst, src, size)
VOIDSTAR dst;
CONST VOIDSTAR src;
SIZET size;
{

  return memcpy(dst, src, size);
}