| 1 | /* $Id: strversion.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Version String Parsing.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2009-2024 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/string.h>
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| 42 | #include "internal/iprt.h"
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| 43 |
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| 44 | #include <iprt/assert.h>
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| 45 | #include <iprt/ctype.h>
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| 46 | #include <iprt/errcore.h>
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| 47 |
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| 48 |
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| 49 | /*********************************************************************************************************************************
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| 50 | * Defined Constants And Macros *
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| 51 | *********************************************************************************************************************************/
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| 52 | #define RTSTRVER_IS_PUNCTUACTION(ch) \
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| 53 | ( (ch) == '_' || (ch) == '-' || (ch) == '+' || RT_C_IS_PUNCT(ch) )
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| 54 |
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| 55 |
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| 56 | /**
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| 57 | * Parses a out the next block from a version string.
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| 58 | *
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| 59 | * @returns true if numeric, false if not.
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| 60 | * @param ppszVer The string cursor, IN/OUT.
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| 61 | * @param pi32Value Where to return the value if numeric.
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| 62 | * @param pcchBlock Where to return the block length.
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| 63 | */
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| 64 | static bool rtStrVersionParseBlock(const char **ppszVer, int32_t *pi32Value, size_t *pcchBlock)
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| 65 | {
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| 66 | const char *psz = *ppszVer;
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| 67 |
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| 68 | /*
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| 69 | * Check for end-of-string.
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| 70 | */
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| 71 | if (!*psz)
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| 72 | {
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| 73 | *pi32Value = 0;
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| 74 | *pcchBlock = 0;
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| 75 | return false;
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| 76 | }
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| 77 |
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| 78 | /*
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| 79 | * Try convert the block to a number the simple way.
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| 80 | */
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| 81 | char ch;
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| 82 | bool fNumeric = RT_C_IS_DIGIT(*psz);
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| 83 | if (fNumeric)
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| 84 | {
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| 85 | do
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| 86 | ch = *++psz;
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| 87 | while (ch && RT_C_IS_DIGIT(ch));
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| 88 |
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| 89 | int rc = RTStrToInt32Ex(*ppszVer, NULL, 10, pi32Value);
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| 90 | if (RT_FAILURE(rc) || rc == VWRN_NUMBER_TOO_BIG)
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| 91 | {
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| 92 | AssertRC(rc);
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| 93 | fNumeric = false;
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| 94 | *pi32Value = 0;
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| 95 | }
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| 96 | }
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| 97 | else
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| 98 | {
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| 99 | /*
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| 100 | * Find the end of the current string. Make a special case for SVN
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| 101 | * revision numbers that immediately follows a release tag string.
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| 102 | */
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| 103 | do
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| 104 | ch = *++psz;
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| 105 | while ( ch
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| 106 | && !RT_C_IS_DIGIT(ch)
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| 107 | && !RTSTRVER_IS_PUNCTUACTION(ch));
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| 108 |
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| 109 | size_t cchBlock = psz - *ppszVer;
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| 110 | if ( cchBlock > 1
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| 111 | && psz[-1] == 'r'
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| 112 | && RT_C_IS_DIGIT(*psz))
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| 113 | {
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| 114 | psz--;
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| 115 | cchBlock--;
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| 116 | }
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| 117 |
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| 118 |
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| 119 | /*
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| 120 | * Translate standard pre release terms to negative values.
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| 121 | */
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| 122 | static const struct
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| 123 | {
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| 124 | size_t cch;
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| 125 | const char *psz;
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| 126 | int32_t iValue;
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| 127 | } s_aTerms[] =
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| 128 | {
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| 129 | { 2, "RC", -100000 },
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| 130 | { 3, "PRE", -200000 },
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| 131 | { 5, "GAMMA", -300000 },
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| 132 | { 4, "BETA", -400000 },
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| 133 | { 5, "ALPHA", -500000 }
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| 134 | };
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| 135 |
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| 136 | int32_t iVal1 = 0;
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| 137 | for (unsigned i = 0; i < RT_ELEMENTS(s_aTerms); i++)
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| 138 | if ( cchBlock == s_aTerms[i].cch
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| 139 | && !RTStrNCmp(s_aTerms[i].psz, *ppszVer, cchBlock))
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| 140 | {
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| 141 | iVal1 = s_aTerms[i].iValue;
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| 142 | break;
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| 143 | }
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| 144 | if (iVal1 != 0)
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| 145 | {
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| 146 | /*
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| 147 | * Does the prelease term have a trailing number?
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| 148 | * Add it assuming BETA == BETA1.
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| 149 | */
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| 150 | if (RT_C_IS_DIGIT(*psz))
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| 151 | {
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| 152 | const char *psz2 = psz;
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| 153 | do
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| 154 | ch = *++psz;
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| 155 | while ( ch
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| 156 | && RT_C_IS_DIGIT(ch)
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| 157 | && !RTSTRVER_IS_PUNCTUACTION(ch));
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| 158 |
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| 159 | int rc = RTStrToInt32Ex(psz2, NULL, 10, pi32Value);
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| 160 | if (RT_SUCCESS(rc) && rc != VWRN_NUMBER_TOO_BIG && *pi32Value)
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| 161 | iVal1 += *pi32Value - 1;
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| 162 | else
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| 163 | {
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| 164 | AssertRC(rc);
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| 165 | psz = psz2;
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| 166 | }
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| 167 | }
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| 168 | fNumeric = true;
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| 169 | }
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| 170 | *pi32Value = iVal1;
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| 171 | }
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| 172 | *pcchBlock = psz - *ppszVer;
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| 173 |
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| 174 | /*
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| 175 | * Skip trailing punctuation.
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| 176 | */
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| 177 | if (RTSTRVER_IS_PUNCTUACTION(*psz))
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| 178 | psz++;
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| 179 | *ppszVer = psz;
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| 180 |
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| 181 | return fNumeric;
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| 182 | }
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| 183 |
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| 184 |
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| 185 | RTDECL(int) RTStrVersionCompare(const char *pszVer1, const char *pszVer2)
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| 186 | {
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| 187 | AssertPtr(pszVer1);
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| 188 | AssertPtr(pszVer2);
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| 189 |
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| 190 | /*
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| 191 | * Do a parallel parse of the strings.
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| 192 | */
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| 193 | while (*pszVer1 || *pszVer2)
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| 194 | {
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| 195 | const char *pszBlock1 = pszVer1;
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| 196 | size_t cchBlock1;
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| 197 | int32_t iVal1;
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| 198 | bool fNumeric1 = rtStrVersionParseBlock(&pszVer1, &iVal1, &cchBlock1);
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| 199 |
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| 200 | const char *pszBlock2 = pszVer2;
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| 201 | size_t cchBlock2;
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| 202 | int32_t iVal2;
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| 203 | bool fNumeric2 = rtStrVersionParseBlock(&pszVer2, &iVal2, &cchBlock2);
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| 204 |
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| 205 | if (fNumeric1 && fNumeric2)
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| 206 | {
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| 207 | if (iVal1 != iVal2)
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| 208 | return iVal1 < iVal2 ? -1 : 1;
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| 209 | }
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| 210 | else if ( fNumeric1 != fNumeric2
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| 211 | && ( fNumeric1
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| 212 | ? iVal1 == 0 && cchBlock2 == 0
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| 213 | : iVal2 == 0 && cchBlock1 == 0)
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| 214 | )
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| 215 | {
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| 216 | /*else: 1.0 == 1.0.0.0.0. */;
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| 217 | }
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| 218 | else if ( fNumeric1 != fNumeric2
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| 219 | && (fNumeric1 ? iVal1 : iVal2) < 0)
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| 220 | {
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| 221 | /* Pre-release indicators are smaller than all other strings. */
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| 222 | return fNumeric1 ? -1 : 1;
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| 223 | }
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| 224 | else
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| 225 | {
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| 226 | int iDiff = RTStrNICmp(pszBlock1, pszBlock2, RT_MIN(cchBlock1, cchBlock2));
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| 227 | if (!iDiff && cchBlock1 != cchBlock2)
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| 228 | iDiff = cchBlock1 < cchBlock2 ? -1 : 1;
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| 229 | if (iDiff)
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| 230 | return iDiff < 0 ? -1 : 1;
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| 231 | }
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| 232 | }
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| 233 | return 0;
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| 234 | }
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| 235 | RT_EXPORT_SYMBOL(RTStrVersionCompare);
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