| 1 | // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. |
| 2 | |
| 3 | namespace WixToolset.Versioning |
| 4 | { |
| 5 | using System; |
| 6 | using System.Collections.Generic; |
| 7 | |
| 8 | /// <summary> |
| 9 | /// WixVersion comparer. |
| 10 | /// </summary> |
| 11 | public class WixVersionComparer : IEqualityComparer<WixVersion>, IComparer<WixVersion> |
| 12 | { |
| 13 | /// <summary> |
| 14 | /// Default WixVersion comparer. |
| 15 | /// </summary> |
| 16 | public static readonly WixVersionComparer Default = new WixVersionComparer(); |
| 17 | |
| 18 | /// <inheritdoc /> |
| 19 | public int Compare(WixVersion x, WixVersion y) |
| 20 | { |
| 21 | if ((object)x == y) |
| 22 | { |
| 23 | return 0; |
| 24 | } |
| 25 | |
| 26 | if (x is null) |
| 27 | { |
| 28 | return -1; |
| 29 | } |
| 30 | |
| 31 | if (y is null) |
| 32 | { |
| 33 | return 1; |
| 34 | } |
| 35 | |
| 36 | var result = x.Major.CompareTo(y.Major); |
| 37 | if (result != 0) |
| 38 | { |
| 39 | return result; |
| 40 | } |
| 41 | |
| 42 | result = x.Minor.CompareTo(y.Minor); |
| 43 | if (result != 0) |
| 44 | { |
| 45 | return result; |
| 46 | } |
| 47 | |
| 48 | result = x.Patch.CompareTo(y.Patch); |
| 49 | if (result != 0) |
| 50 | { |
| 51 | return result; |
| 52 | } |
| 53 | |
| 54 | result = x.Revision.CompareTo(y.Revision); |
| 55 | if (result != 0) |
| 56 | { |
| 57 | return result; |
| 58 | } |
| 59 | |
| 60 | var xLabelCount = x.Labels?.Length ?? 0; |
| 61 | var yLabelCount = y.Labels?.Length ?? 0; |
| 62 | var maxLabelCount = Math.Max(xLabelCount, yLabelCount); |
| 63 | |
| 64 | if (xLabelCount > 0) |
| 65 | { |
| 66 | if (yLabelCount == 0) |
| 67 | { |
| 68 | return -1; |
| 69 | } |
| 70 | } |
| 71 | else if (yLabelCount > 0) |
| 72 | { |
| 73 | return 1; |
| 74 | } |
| 75 | |
| 76 | for (var i = 0; i < maxLabelCount; ++i) |
| 77 | { |
| 78 | var xLabel = i < xLabelCount ? x.Labels[i] : null; |
| 79 | var yLabel = i < yLabelCount ? y.Labels[i] : null; |
| 80 | |
| 81 | result = CompareReleaseLabel(xLabel, yLabel); |
| 82 | if (result != 0) |
| 83 | { |
| 84 | return result; |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | var compareMetadata = false; |
| 89 | |
| 90 | if (x.Invalid) |
| 91 | { |
| 92 | if (!y.Invalid) |
| 93 | { |
| 94 | return -1; |
| 95 | } |
| 96 | else |
| 97 | { |
| 98 | compareMetadata = true; |
| 99 | } |
| 100 | } |
| 101 | else if (y.Invalid) |
| 102 | { |
| 103 | return 1; |
| 104 | } |
| 105 | |
| 106 | if (compareMetadata) |
| 107 | { |
| 108 | result = String.Compare(x.Metadata, y.Metadata, StringComparison.OrdinalIgnoreCase); |
| 109 | } |
| 110 | |
| 111 | return (result == 0) ? 0 : (result < 0) ? -1 : 1; |
| 112 | } |
| 113 | |
| 114 | /// <inheritdoc /> |
| 115 | public bool Equals(WixVersion x, WixVersion y) |
| 116 | { |
| 117 | if ((object)x == y) |
| 118 | { |
| 119 | return true; |
| 120 | } |
| 121 | |
| 122 | if (x is null) |
| 123 | { |
| 124 | return false; |
| 125 | } |
| 126 | |
| 127 | if (y is null) |
| 128 | { |
| 129 | return false; |
| 130 | } |
| 131 | |
| 132 | if (x.Major != y.Major) |
| 133 | { |
| 134 | return false; |
| 135 | } |
| 136 | |
| 137 | if (x.Minor != y.Minor) |
| 138 | { |
| 139 | return false; |
| 140 | } |
| 141 | |
| 142 | if (x.Patch != y.Patch) |
| 143 | { |
| 144 | return false; |
| 145 | } |
| 146 | |
| 147 | if (x.Revision != y.Revision) |
| 148 | { |
| 149 | return false; |
| 150 | } |
| 151 | |
| 152 | var labelCount = x.Labels?.Length ?? 0; |
| 153 | if (labelCount != (y.Labels?.Length ?? 0)) |
| 154 | { |
| 155 | return false; |
| 156 | } |
| 157 | |
| 158 | for (var i = 0; i < labelCount; ++i) |
| 159 | { |
| 160 | var result = CompareReleaseLabel(x.Labels[i], y.Labels[i]); |
| 161 | if (result != 0) |
| 162 | { |
| 163 | return false; |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | if (x.Invalid) |
| 168 | { |
| 169 | if (y.Invalid) |
| 170 | { |
| 171 | return String.Equals(x.Metadata, y.Metadata, StringComparison.OrdinalIgnoreCase); |
| 172 | } |
| 173 | else |
| 174 | { |
| 175 | return false; |
| 176 | } |
| 177 | } |
| 178 | else if (y.Invalid) |
| 179 | { |
| 180 | return false; |
| 181 | } |
| 182 | |
| 183 | return true; |
| 184 | } |
| 185 | |
| 186 | /// <inheritdoc /> |
| 187 | public int GetHashCode(WixVersion version) |
| 188 | { |
| 189 | var hash = 23L; |
| 190 | hash = hash * 37 + (version.Prefix ?? '\0'); |
| 191 | hash = hash * 37 + version.Major; |
| 192 | hash = hash * 37 + version.Minor; |
| 193 | hash = hash * 37 + version.Patch; |
| 194 | hash = hash * 37 + version.Revision; |
| 195 | hash = hash * 37 + (version.Invalid ? 1 : 0); |
| 196 | hash = hash * 37 + (version.HasMajor ? 1 : 0); |
| 197 | hash = hash * 37 + (version.HasMinor ? 1 : 0); |
| 198 | hash = hash * 37 + (version.HasPatch ? 1 : 0); |
| 199 | hash = hash * 37 + (version.HasRevision ? 1 : 0); |
| 200 | |
| 201 | if (version.Labels != null) |
| 202 | { |
| 203 | foreach (var label in version.Labels) |
| 204 | { |
| 205 | hash = hash * 37 + label.Label.GetHashCode(); |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | hash = hash * 37 + version.Metadata?.GetHashCode() ?? 0; |
| 210 | |
| 211 | return unchecked((int)hash); |
| 212 | } |
| 213 | |
| 214 | private static int CompareReleaseLabel(WixVersionLabel l1, WixVersionLabel l2) |
| 215 | { |
| 216 | if (l1 == l2) |
| 217 | { |
| 218 | return 0; |
| 219 | } |
| 220 | else if (l2 == null) |
| 221 | { |
| 222 | return 1; |
| 223 | } |
| 224 | else if (l1 == null) |
| 225 | { |
| 226 | return -1; |
| 227 | } |
| 228 | |
| 229 | if (l1.Numeric.HasValue) |
| 230 | { |
| 231 | if (l2.Numeric.HasValue) |
| 232 | { |
| 233 | return l1.Numeric.Value.CompareTo(l2.Numeric.Value); |
| 234 | } |
| 235 | else |
| 236 | { |
| 237 | return -1; |
| 238 | } |
| 239 | } |
| 240 | else |
| 241 | { |
| 242 | if (l2.Numeric.HasValue) |
| 243 | { |
| 244 | return 1; |
| 245 | } |
| 246 | else |
| 247 | { |
| 248 | return String.Compare(l1.Label, l2.Label, StringComparison.OrdinalIgnoreCase); |
| 249 | } |
| 250 | } |
| 251 | } |
| 252 | } |
| 253 | } |