source: trunk/kStuff/kHlp/Generic/kHlpMemCopy.c@ 3574

/* $Id: kHlpMemCopy.c 3574 2007-09-02 19:30:58Z bird $ */
/** @file
 * kHlpString - kHlpMemCopy.
 */

/*
 * Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
 *
 * This file is part of kStuff.
 *
 * kStuff is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * kStuff is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with kStuff; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

/*******************************************************************************
*   Header Files                                                               *
*******************************************************************************/
#include <k/kHlpString.h>


KHLP_DECL(void *) kHlpMemCopy(void *pv1, const void *pv2, KSIZE cb)
{
    union
    {
        void *pv;
        KU8 *pb;
        KUPTR *pu;
    } u1;
    union
    {
        const void *pv;
        const KU8 *pb;
        const KUPTR *pu;
    } u2;

    u1.pv = pv1;
    u2.pv = pv2;

    if (cb >= 32)
    {
        while (cb > sizeof(KUPTR))
        {
            cb -= sizeof(KUPTR);
            *u1.pu++ = *u2.pu++;
        }
    }

    while (cb-- > 0)
        *u1.pb++ = *u2.pb++;

    return pv1;
}