/* $Id: RTPathTraverseList.cpp $ */
/** @file
 * IPRT - RTPathTraverseList
 */

/*
 * Copyright (C) 2009-2023 Oracle and/or its affiliates.
 *
 * This file is part of VirtualBox base platform packages, as
 * available from https://www.virtualbox.org.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation, in version 3 of the
 * License.
 *
 * This program 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <https://www.gnu.org/licenses>.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
 * in the VirtualBox 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.
 *
 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
 */


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

#include <iprt/assert.h>
#include <iprt/ctype.h>
#include <iprt/errcore.h>
#include <iprt/string.h>


RTDECL(int) RTPathTraverseList(const char *pszPathList, char chSep, PFNRTPATHTRAVERSER pfnCallback, void *pvUser1, void *pvUser2)
{
    AssertPtrNull(pszPathList);
    Assert((unsigned int)chSep <= 127);

    if (!pszPathList)
        return VERR_END_OF_STRING;

    /*
     * Walk the path list.
     */
    const char *psz = pszPathList;
    while (*psz)
    {
        /* Skip leading blanks - no directories with leading spaces, thank you. */
        while (RT_C_IS_BLANK(*psz))
            psz++;

        /* Find the end of this element. */
        const char *pszNext;
        const char *pszEnd = strchr(psz, chSep);
        if (!pszEnd)
            pszEnd = pszNext = strchr(psz, '\0');
        else
            pszNext = pszEnd + 1;
        if (pszEnd != psz)
        {
            size_t const cch = pszEnd - psz;
            int rc = pfnCallback(psz, cch, pvUser1, pvUser2);
            if (rc != VERR_TRY_AGAIN)
                return rc;
        }

        /* advance */
        psz = pszNext;
    }

    return VERR_END_OF_STRING;
}
RT_EXPORT_SYMBOL(RTPathTraverseList);