40 lines
2.1 KiB
C#
40 lines
2.1 KiB
C#
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using System;
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using System.Diagnostics;
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using System.Collections.Generic;
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using System.Globalization;
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internal class DigestComparer : IComparer<byte[]>, IEqualityComparer<byte[]>
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{
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int IComparer<byte[]>.Compare(byte[] digest1, byte[] digest2)
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{
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Debug.Assert(digest1.Length == 16 && digest2.Length == 16, "Invalid digest!");
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for (int index = 0; index < 16; index++)
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if (digest1[index] != digest2[index])
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return (digest1[index] < digest2[index]) ? -1 : 1;
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return 0;
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}
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bool IEqualityComparer<byte[]>.Equals(byte[] digest1, byte[] digest2)
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{
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Debug.Assert(digest1.Length == 16 && digest2.Length == 16, "Invalid digest!");
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for (int index = 0; index < 16; index++)
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if (digest1[index] != digest2[index])
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return false;
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return true;
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}
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int IEqualityComparer<byte[]>.GetHashCode(byte[] checksumBytes)
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{
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return GetMD5DigestString(checksumBytes).GetHashCode();
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}
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internal static string GetMD5DigestString(byte[] md5Digest)
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{
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return string.Format(CultureInfo.InvariantCulture, "{0}{1}{2}{3}{4}{5}{6}{7}{8}{9}{10}{11}{12}{13}{14}{15}", md5Digest[0].ToString("X2", CultureInfo.InvariantCulture), md5Digest[1].ToString("X2", CultureInfo.InvariantCulture), md5Digest[2].ToString("X2", CultureInfo.InvariantCulture), md5Digest[3].ToString("X2", CultureInfo.InvariantCulture), md5Digest[4].ToString("X2", CultureInfo.InvariantCulture), md5Digest[5].ToString("X2", CultureInfo.InvariantCulture), md5Digest[6].ToString("X2", CultureInfo.InvariantCulture), md5Digest[7].ToString("X2", CultureInfo.InvariantCulture), md5Digest[8].ToString("X2", CultureInfo.InvariantCulture), md5Digest[9].ToString("X2", CultureInfo.InvariantCulture), md5Digest[10].ToString("X2", CultureInfo.InvariantCulture), md5Digest[11].ToString("X2", CultureInfo.InvariantCulture), md5Digest[12].ToString("X2", CultureInfo.InvariantCulture), md5Digest[13].ToString("X2", CultureInfo.InvariantCulture), md5Digest[14].ToString("X2", CultureInfo.InvariantCulture), md5Digest[15].ToString("X2", CultureInfo.InvariantCulture));
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}
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}
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