1 | /* $Id: strversion.cpp 76553 2019-01-01 01:45:53Z 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) 2009-2019 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | *
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17 | * The contents of this file may alternatively be used under the terms
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18 | * of the Common Development and Distribution License Version 1.0
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19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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20 | * VirtualBox OSE distribution, in which case the provisions of the
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21 | * CDDL are applicable instead of those of the GPL.
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22 | *
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23 | * You may elect to license modified versions of this file under the
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24 | * terms and conditions of either the GPL or the CDDL or both.
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25 | */
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26 |
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27 |
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28 | /*********************************************************************************************************************************
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29 | * Header Files *
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30 | *********************************************************************************************************************************/
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31 | #include <iprt/string.h>
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32 | #include "internal/iprt.h"
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33 |
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34 | #include <iprt/assert.h>
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35 | #include <iprt/ctype.h>
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36 | #include <iprt/errcore.h>
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37 |
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38 |
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39 | /*********************************************************************************************************************************
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40 | * Defined Constants And Macros *
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41 | *********************************************************************************************************************************/
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42 | #define RTSTRVER_IS_PUNCTUACTION(ch) \
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43 | ( (ch) == '_' || (ch) == '-' || (ch) == '+' || RT_C_IS_PUNCT(ch) )
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44 |
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45 |
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46 | /**
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47 | * Parses a out the next block from a version string.
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48 | *
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49 | * @returns true if numeric, false if not.
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50 | * @param ppszVer The string cursor, IN/OUT.
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51 | * @param pi32Value Where to return the value if numeric.
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52 | * @param pcchBlock Where to return the block length.
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53 | */
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54 | static bool rtStrVersionParseBlock(const char **ppszVer, int32_t *pi32Value, size_t *pcchBlock)
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55 | {
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56 | const char *psz = *ppszVer;
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57 |
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58 | /*
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59 | * Check for end-of-string.
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60 | */
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61 | if (!*psz)
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62 | {
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63 | *pi32Value = 0;
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64 | *pcchBlock = 0;
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65 | return false;
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66 | }
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67 |
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68 | /*
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69 | * Try convert the block to a number the simple way.
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70 | */
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71 | char ch;
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72 | bool fNumeric = RT_C_IS_DIGIT(*psz);
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73 | if (fNumeric)
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74 | {
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75 | do
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76 | ch = *++psz;
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77 | while (ch && RT_C_IS_DIGIT(ch));
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78 |
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79 | int rc = RTStrToInt32Ex(*ppszVer, NULL, 10, pi32Value);
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80 | if (RT_FAILURE(rc) || rc == VWRN_NUMBER_TOO_BIG)
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81 | {
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82 | AssertRC(rc);
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83 | fNumeric = false;
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84 | *pi32Value = 0;
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85 | }
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86 | }
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87 | else
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88 | {
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89 | /*
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90 | * Find the end of the current string. Make a special case for SVN
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91 | * revision numbers that immediately follows a release tag string.
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92 | */
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93 | do
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94 | ch = *++psz;
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95 | while ( ch
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96 | && !RT_C_IS_DIGIT(ch)
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97 | && !RTSTRVER_IS_PUNCTUACTION(ch));
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98 |
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99 | size_t cchBlock = psz - *ppszVer;
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100 | if ( cchBlock > 1
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101 | && psz[-1] == 'r'
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102 | && RT_C_IS_DIGIT(*psz))
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103 | {
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104 | psz--;
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105 | cchBlock--;
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106 | }
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107 |
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108 |
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109 | /*
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110 | * Translate standard pre release terms to negative values.
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111 | */
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112 | static const struct
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113 | {
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114 | size_t cch;
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115 | const char *psz;
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116 | int32_t iValue;
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117 | } s_aTerms[] =
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118 | {
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119 | { 2, "RC", -100000 },
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120 | { 3, "PRE", -200000 },
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121 | { 5, "GAMMA", -300000 },
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122 | { 4, "BETA", -400000 },
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123 | { 5, "ALPHA", -500000 }
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124 | };
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125 |
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126 | int32_t iVal1 = 0;
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127 | for (unsigned i = 0; i < RT_ELEMENTS(s_aTerms); i++)
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128 | if ( cchBlock == s_aTerms[i].cch
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129 | && !RTStrNCmp(s_aTerms[i].psz, *ppszVer, cchBlock))
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130 | {
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131 | iVal1 = s_aTerms[i].iValue;
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132 | break;
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133 | }
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134 | if (iVal1 != 0)
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135 | {
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136 | /*
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137 | * Does the prelease term have a trailing number?
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138 | * Add it assuming BETA == BETA1.
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139 | */
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140 | if (RT_C_IS_DIGIT(*psz))
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141 | {
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142 | const char *psz2 = psz;
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143 | do
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144 | ch = *++psz;
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145 | while ( ch
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146 | && RT_C_IS_DIGIT(ch)
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147 | && !RTSTRVER_IS_PUNCTUACTION(ch));
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148 |
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149 | int rc = RTStrToInt32Ex(psz2, NULL, 10, pi32Value);
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150 | if (RT_SUCCESS(rc) && rc != VWRN_NUMBER_TOO_BIG && *pi32Value)
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151 | iVal1 += *pi32Value - 1;
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152 | else
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153 | {
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154 | AssertRC(rc);
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155 | psz = psz2;
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156 | }
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157 | }
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158 | fNumeric = true;
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159 | }
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160 | *pi32Value = iVal1;
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161 | }
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162 | *pcchBlock = psz - *ppszVer;
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163 |
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164 | /*
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165 | * Skip trailing punctuation.
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166 | */
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167 | if (RTSTRVER_IS_PUNCTUACTION(*psz))
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168 | psz++;
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169 | *ppszVer = psz;
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170 |
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171 | return fNumeric;
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172 | }
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173 |
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174 |
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175 | RTDECL(int) RTStrVersionCompare(const char *pszVer1, const char *pszVer2)
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176 | {
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177 | AssertPtr(pszVer1);
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178 | AssertPtr(pszVer2);
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179 |
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180 | /*
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181 | * Do a parallel parse of the strings.
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182 | */
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183 | while (*pszVer1 || *pszVer2)
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184 | {
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185 | const char *pszBlock1 = pszVer1;
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186 | size_t cchBlock1;
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187 | int32_t iVal1;
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188 | bool fNumeric1 = rtStrVersionParseBlock(&pszVer1, &iVal1, &cchBlock1);
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189 |
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190 | const char *pszBlock2 = pszVer2;
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191 | size_t cchBlock2;
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192 | int32_t iVal2;
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193 | bool fNumeric2 = rtStrVersionParseBlock(&pszVer2, &iVal2, &cchBlock2);
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194 |
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195 | if (fNumeric1 && fNumeric2)
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196 | {
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197 | if (iVal1 != iVal2)
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198 | return iVal1 < iVal2 ? -1 : 1;
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199 | }
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200 | else if ( fNumeric1 != fNumeric2
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201 | && ( fNumeric1
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202 | ? iVal1 == 0 && cchBlock2 == 0
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203 | : iVal2 == 0 && cchBlock1 == 0)
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204 | )
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205 | {
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206 | /*else: 1.0 == 1.0.0.0.0. */;
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207 | }
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208 | else if ( fNumeric1 != fNumeric2
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209 | && (fNumeric1 ? iVal1 : iVal2) < 0)
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210 | {
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211 | /* Pre-release indicators are smaller than all other strings. */
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212 | return fNumeric1 ? -1 : 1;
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213 | }
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214 | else
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215 | {
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216 | int iDiff = RTStrNICmp(pszBlock1, pszBlock2, RT_MIN(cchBlock1, cchBlock2));
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217 | if (!iDiff && cchBlock1 != cchBlock2)
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218 | iDiff = cchBlock1 < cchBlock2 ? -1 : 1;
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219 | if (iDiff)
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220 | return iDiff < 0 ? -1 : 1;
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221 | }
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222 | }
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223 | return 0;
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224 | }
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225 | RT_EXPORT_SYMBOL(RTStrVersionCompare);
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