Juan Manuel Alvarez
98 lines
3.8 KiB
C#
98 lines
3.8 KiB
C#
/*
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* QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
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* Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System.Globalization;
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using System.Linq;
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namespace QuantConnect.Util
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{
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/// <summary>
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/// Provides methods for dealing with lean assembly versions
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/// </summary>
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public static class VersionHelper
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{
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private static readonly bool IgnoreVersionChecks = Configuration.Config.GetBool("ignore-version-checks");
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/// <summary>
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/// Determines whether or not the specified version is older than this instance
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/// </summary>
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/// <param name="version">The version to compare</param>
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/// <returns>True if the specified version is older, false otherwise</returns>
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public static bool IsOlderVersion(string version)
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{
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return CompareVersions(version, Globals.Version) < 0;
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}
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/// <summary>
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/// Determines whether or not the specified version is newer than this instance
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/// </summary>
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/// <param name="version">The version to compare</param>
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/// <returns>True if the specified version is newer, false otherwise</returns>
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public static bool IsNewerVersion(string version)
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{
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return CompareVersions(version, Globals.Version) > 0;
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}
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/// <summary>
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/// Determines whether or not the specified version is equal to this instance
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/// </summary>
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/// <param name="version">The version to compare</param>
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/// <returns>True if the specified version is equal, false otherwise</returns>
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public static bool IsEqualVersion(string version)
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{
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return CompareVersions(version, Globals.Version) == 0;
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}
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/// <summary>
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/// Determines whether or not the specified version is not equal to this instance
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/// </summary>
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/// <param name="version">The version to compare</param>
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/// <returns>True if the specified version is not equal, false otherwise</returns>
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public static bool IsNotEqualVersion(string version)
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{
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return !IsEqualVersion(version);
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}
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/// <summary>
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/// Compares two versions
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/// </summary>
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/// <returns>1 if the left version is after the right, 0 if they're the same, -1 if the left is before the right</returns>
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public static int CompareVersions(string left, string right)
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{
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if (IgnoreVersionChecks || left == right) return 0;
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// we actually need to parse the ints here, made up of 4 parts separated by '.'
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// sample: 123.45.67.90123
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var leftv = ParseVersion(left);
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var rightv = ParseVersion(right);
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for (int i = 0; i < leftv.Length; i++)
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{
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int comparison = leftv[i].CompareTo(rightv[i]);
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if (comparison != 0)
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{
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return comparison;
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}
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}
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return 0;
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}
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private static int[] ParseVersion(string version)
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{
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var parts = version.Split('.');
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return parts.Select(x => int.Parse(x, CultureInfo.InvariantCulture)).ToArray();
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}
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}
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}
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