/* $Id: RTStrCatEx.cpp 57358 2015-08-14 15:16:38Z vboxsync $ */
/** @file
 * IPRT - RTStrCatEx
 */

/*
 * Copyright (C) 2010-2015 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/string.h>
#include "internal/iprt.h"


RTDECL(int) RTStrCatEx(char *pszDst, size_t cbDst, const char *pszSrc, size_t cchMaxSrc)
{
    char *pszDst2 = RTStrEnd(pszDst, cbDst);
    AssertReturn(pszDst2, VERR_INVALID_PARAMETER);
    cbDst -= pszDst2 - pszDst;

    const char *pszSrcEol = RTStrEnd(pszSrc, cchMaxSrc);
    size_t      cchSrc    = pszSrcEol ? (size_t)(pszSrcEol - pszSrc) : cchMaxSrc;
    if (RT_LIKELY(cchSrc < cbDst))
    {
        memcpy(pszDst2, pszSrc, cchSrc);
        pszDst2[cchSrc] = '\0';
        return VINF_SUCCESS;
    }

    if (cbDst != 0)
    {
        memcpy(pszDst2, pszSrc, cbDst - 1);
        pszDst2[cbDst - 1] = '\0';
    }
    return VERR_BUFFER_OVERFLOW;
}
RT_EXPORT_SYMBOL(RTStrCatEx);