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/* $Id: RTStrSplit.cpp $ */
/** @file
* IPRT - RTStrSplit.
*/
/*
* Copyright (C) 2020-2023 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 <iprt/mem.h>
#include <iprt/string.h>
#include "internal/iprt.h"
RTDECL(int) RTStrSplit(const char *pcszStrings, size_t cbStrings,
const char *pcszSeparator, char ***ppapszStrings, size_t *pcStrings)
{
AssertPtrReturn(pcszStrings, VERR_INVALID_POINTER);
AssertReturn(cbStrings, VERR_INVALID_PARAMETER);
AssertPtrReturn(pcszSeparator, VERR_INVALID_POINTER);
AssertPtrReturn(ppapszStrings, VERR_INVALID_POINTER);
AssertPtrReturn(pcStrings, VERR_INVALID_POINTER);
size_t cStrings = 0;
/* Determine the number of paths in buffer first. */
size_t cch = cbStrings - 1;
char const *pcszTmp = pcszStrings;
const char *pcszEnd = RTStrEnd(pcszTmp, RTSTR_MAX);
char const *pcszNext;
const size_t cchSep = strlen(pcszSeparator);
size_t cchNext;
while (cch > 0)
{
pcszNext = RTStrStr(pcszTmp, pcszSeparator);
if (!pcszNext)
break;
cchNext = pcszNext - pcszTmp;
if (cchNext + cchSep > cch)
break;
pcszNext += cchSep;
pcszTmp += cchNext + cchSep;
cch -= cchNext + cchSep;
if (cchNext)
++cStrings;
}
if (pcszTmp != pcszEnd) /* Do we need to take a trailing string without separator into account? */
cStrings++;
if (!cStrings)
{
*ppapszStrings = NULL;
*pcStrings = 0;
return VINF_SUCCESS;
}
char **papszStrings = (char **)RTMemAllocZ(cStrings * sizeof(char *));
if (!papszStrings)
return VERR_NO_MEMORY;
int rc = VINF_SUCCESS;
cch = cbStrings - 1;
pcszTmp = pcszStrings;
for (size_t i = 0; i < cStrings;)
{
pcszNext = RTStrStr(pcszTmp, pcszSeparator);
if (!pcszNext)
pcszNext = pcszEnd;
cchNext = pcszNext - pcszTmp;
if (cchNext)
{
papszStrings[i] = RTStrDupN(pcszTmp, cchNext);
if (!papszStrings[i])
{
rc = VERR_NO_MEMORY;
break;
}
i++;
}
pcszTmp += cchNext + cchSep;
cch -= cchNext + cchSep;
}
if (RT_SUCCESS(rc))
{
*ppapszStrings = papszStrings;
*pcStrings = cStrings;
return VINF_SUCCESS;
}
for (size_t i = 0; i < cStrings; ++i)
RTStrFree(papszStrings[i]);
RTMemFree(papszStrings);
return rc;
}
RT_EXPORT_SYMBOL(RTStrSplit);
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