| 1 | /* $Id: RTStrSplit.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - RTStrSplit.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2020-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #include <iprt/mem.h>
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| 42 | #include <iprt/string.h>
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| 43 | #include "internal/iprt.h"
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| 44 |
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| 45 |
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| 46 | RTDECL(int) RTStrSplit(const char *pcszStrings, size_t cbStrings,
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| 47 | const char *pcszSeparator, char ***ppapszStrings, size_t *pcStrings)
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| 48 | {
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| 49 | AssertPtrReturn(pcszStrings, VERR_INVALID_POINTER);
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| 50 | AssertReturn(cbStrings, VERR_INVALID_PARAMETER);
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| 51 | AssertPtrReturn(pcszSeparator, VERR_INVALID_POINTER);
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| 52 | AssertPtrReturn(ppapszStrings, VERR_INVALID_POINTER);
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| 53 | AssertPtrReturn(pcStrings, VERR_INVALID_POINTER);
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| 54 |
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| 55 | size_t cStrings = 0;
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| 56 |
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| 57 | /* Determine the number of paths in buffer first. */
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| 58 | size_t cch = cbStrings - 1;
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| 59 | char const *pcszTmp = pcszStrings;
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| 60 | const char *pcszEnd = RTStrEnd(pcszTmp, RTSTR_MAX);
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| 61 | char const *pcszNext;
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| 62 | const size_t cchSep = strlen(pcszSeparator);
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| 63 | size_t cchNext;
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| 64 | while (cch > 0)
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| 65 | {
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| 66 | pcszNext = RTStrStr(pcszTmp, pcszSeparator);
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| 67 | if (!pcszNext)
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| 68 | break;
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| 69 | cchNext = pcszNext - pcszTmp;
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| 70 | if (cchNext + cchSep > cch)
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| 71 | break;
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| 72 | pcszNext += cchSep;
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| 73 | pcszTmp += cchNext + cchSep;
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| 74 | cch -= cchNext + cchSep;
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| 75 | if (cchNext)
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| 76 | ++cStrings;
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| 77 | }
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| 78 |
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| 79 | if (pcszTmp != pcszEnd) /* Do we need to take a trailing string without separator into account? */
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| 80 | cStrings++;
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| 81 |
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| 82 | if (!cStrings)
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| 83 | {
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| 84 | *ppapszStrings = NULL;
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| 85 | *pcStrings = 0;
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| 86 | return VINF_SUCCESS;
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| 87 | }
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| 88 |
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| 89 | char **papszStrings = (char **)RTMemAllocZ(cStrings * sizeof(char *));
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| 90 | if (!papszStrings)
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| 91 | return VERR_NO_MEMORY;
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| 92 |
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| 93 | int rc = VINF_SUCCESS;
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| 94 |
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| 95 | cch = cbStrings - 1;
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| 96 | pcszTmp = pcszStrings;
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| 97 |
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| 98 | for (size_t i = 0; i < cStrings;)
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| 99 | {
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| 100 | pcszNext = RTStrStr(pcszTmp, pcszSeparator);
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| 101 | if (!pcszNext)
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| 102 | pcszNext = pcszEnd;
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| 103 | cchNext = pcszNext - pcszTmp;
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| 104 | if (cchNext)
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| 105 | {
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| 106 | papszStrings[i] = RTStrDupN(pcszTmp, cchNext);
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| 107 | if (!papszStrings[i])
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| 108 | {
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| 109 | rc = VERR_NO_MEMORY;
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| 110 | break;
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| 111 | }
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| 112 | i++;
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| 113 | }
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| 114 | pcszTmp += cchNext + cchSep;
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| 115 | cch -= cchNext + cchSep;
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| 116 | }
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| 117 |
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| 118 | if (RT_SUCCESS(rc))
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| 119 | {
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| 120 | *ppapszStrings = papszStrings;
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| 121 | *pcStrings = cStrings;
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| 122 |
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| 123 | return VINF_SUCCESS;
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| 124 | }
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| 125 |
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| 126 | for (size_t i = 0; i < cStrings; ++i)
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| 127 | RTStrFree(papszStrings[i]);
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| 128 | RTMemFree(papszStrings);
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| 129 |
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| 130 | return rc;
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| 131 | }
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| 132 | RT_EXPORT_SYMBOL(RTStrSplit);
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| 133 |
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