60 lines
1.7 KiB
C#
60 lines
1.7 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace OpenSubtitlesHandler
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{
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public class MovieHasher
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{
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public static byte[] ComputeMovieHash(string filename)
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{
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byte[] result;
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using (Stream input = File.OpenRead(filename))
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{
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result = ComputeMovieHash(input);
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}
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return result;
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}
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private static byte[] ComputeMovieHash(Stream input)
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{
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long lhash, streamsize;
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streamsize = input.Length;
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lhash = streamsize;
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long i = 0;
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byte[] buffer = new byte[sizeof(long)];
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while (i < 65536 / sizeof(long) && (input.Read(buffer, 0, sizeof(long)) > 0))
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{
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i++;
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lhash += BitConverter.ToInt64(buffer, 0);
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}
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input.Position = Math.Max(0, streamsize - 65536);
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i = 0;
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while (i < 65536 / sizeof(long) && (input.Read(buffer, 0, sizeof(long)) > 0))
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{
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i++;
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lhash += BitConverter.ToInt64(buffer, 0);
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}
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input.Close();
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byte[] result = BitConverter.GetBytes(lhash);
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Array.Reverse(result);
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return result;
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}
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public static string ToHexadecimal(byte[] bytes)
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{
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StringBuilder hexBuilder = new StringBuilder();
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for (int i = 0; i < bytes.Length; i++)
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{
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hexBuilder.Append(bytes[i].ToString("x2"));
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}
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return hexBuilder.ToString();
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}
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}
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}
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