/* $Id: RTUtf16CopyEx.cpp 78732 2019-05-24 15:28:44Z vboxsync $ */
/** @file
 * IPRT - RTUtf16CopyEx.
 */

/*
 * Copyright (C) 2010-2019 Oracle Corporation
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
 * VirtualBox OSE distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 */


/*********************************************************************************************************************************
*   Header Files                                                                                                                 *
*********************************************************************************************************************************/
#include <iprt/utf16.h>
#include "internal/iprt.h"

#include <iprt/errcore.h>


RTDECL(int) RTUtf16CopyEx(PRTUTF16 pwszDst, size_t cwcDst, PCRTUTF16 pwszSrc, size_t cwcSrcMax)
{
    size_t cwcSrc = RTUtf16NLen(pwszSrc, cwcSrcMax);
    if (RT_LIKELY(cwcSrc < cwcDst))
    {
        memcpy(pwszDst, pwszSrc, cwcSrc * sizeof(RTUTF16));
        pwszDst[cwcSrc] = '\0';
        return VINF_SUCCESS;
    }

    if (cwcDst != 0)
    {
        memcpy(pwszDst, pwszSrc, (cwcDst - 1) * sizeof(RTUTF16));
        pwszDst[cwcDst - 1] = '\0';
    }
    return VERR_BUFFER_OVERFLOW;
}
RT_EXPORT_SYMBOL(RTUtf16CopyEx);