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87 lines
2.8 KiB
87 lines
2.8 KiB
1 year ago
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#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
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#pragma warning disable
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using System;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Math.Raw;
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Utilities
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{
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public abstract class Longs
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{
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public const int NumBits = 64;
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public const int NumBytes = 8;
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private static readonly byte[] DeBruijnTZ = {
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0x3F, 0x00, 0x01, 0x34, 0x02, 0x06, 0x35, 0x1A, 0x03, 0x25, 0x28, 0x07, 0x21, 0x36, 0x2F, 0x1B,
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0x3D, 0x04, 0x26, 0x2D, 0x2B, 0x29, 0x15, 0x08, 0x17, 0x22, 0x3A, 0x37, 0x30, 0x11, 0x1C, 0x0A,
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0x3E, 0x33, 0x05, 0x19, 0x24, 0x27, 0x20, 0x2E, 0x3C, 0x2C, 0x2A, 0x14, 0x16, 0x39, 0x10, 0x09,
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0x32, 0x18, 0x23, 0x1F, 0x3B, 0x13, 0x38, 0x0F, 0x31, 0x1E, 0x12, 0x0E, 0x1D, 0x0D, 0x0C, 0x0B };
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public static int NumberOfLeadingZeros(long i)
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{
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int x = (int)(i >> 32), n = 0;
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if (x == 0)
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{
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n = 32;
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x = (int)i;
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}
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return n + Integers.NumberOfLeadingZeros(x);
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}
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public static int NumberOfTrailingZeros(long i)
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{
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int n = DeBruijnTZ[(uint)((ulong)((i & -i) * 0x045FBAC7992A70DAL) >> 58)];
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long m = (((i & 0xFFFFFFFFL) | (long)((ulong)i >> 32)) - 1L) >> 63;
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return n - (int)m;
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}
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public static long Reverse(long i)
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{
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return (long)Reverse((ulong)i);
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}
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public static ulong Reverse(ulong i)
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{
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i = Bits.BitPermuteStepSimple(i, 0x5555555555555555UL, 1);
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i = Bits.BitPermuteStepSimple(i, 0x3333333333333333UL, 2);
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i = Bits.BitPermuteStepSimple(i, 0x0F0F0F0F0F0F0F0FUL, 4);
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return ReverseBytes(i);
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}
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public static long ReverseBytes(long i)
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{
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return (long)ReverseBytes((ulong)i);
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}
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public static ulong ReverseBytes(ulong i)
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{
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return RotateLeft(i & 0xFF000000FF000000UL, 8) |
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RotateLeft(i & 0x00FF000000FF0000UL, 24) |
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RotateLeft(i & 0x0000FF000000FF00UL, 40) |
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RotateLeft(i & 0x000000FF000000FFUL, 56);
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}
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public static long RotateLeft(long i, int distance)
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{
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return (i << distance) ^ (long)((ulong)i >> -distance);
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}
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public static ulong RotateLeft(ulong i, int distance)
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{
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return (i << distance) ^ (i >> -distance);
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}
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public static long RotateRight(long i, int distance)
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{
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return (long)((ulong)i >> distance) ^ (i << -distance);
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}
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public static ulong RotateRight(ulong i, int distance)
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{
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return (i >> distance) ^ (i << -distance);
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}
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}
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}
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#pragma warning restore
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#endif
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