54 lines
1.4 KiB
C#
54 lines
1.4 KiB
C#
using System;
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namespace Server.Misc
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{
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public class HexStringConverter
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{
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public static readonly uint[] m_Lookup32Chars = CreateLookup32Chars();
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private static uint[] CreateLookup32Chars()
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{
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var result = new uint[256];
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for (int i = 0; i < 256; i++)
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{
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string s = i.ToString("X2");
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if (BitConverter.IsLittleEndian)
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result[i] = s[0] + ((uint)s[1] << 16);
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else
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result[i] = s[1] + ((uint)s[0] << 16);
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}
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return result;
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}
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public static unsafe string GetString(ReadOnlySpan<byte> bytes)
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{
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var result = new string((char)0, bytes.Length * 2);
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fixed (char* resultP = result)
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{
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uint* resultP2 = (uint*)resultP;
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for (int i = 0; i < bytes.Length; i++)
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resultP2[i] = m_Lookup32Chars[bytes[i]];
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}
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return result;
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}
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public static unsafe void GetBytes(string str, Span<byte> bytes)
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{
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fixed (char* strP = str)
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{
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int i = 0;
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int j = 0;
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while (i < str.Length)
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{
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int chr1 = strP[i++];
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int chr2 = strP[i++];
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if (BitConverter.IsLittleEndian)
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bytes[j++] = (byte)((chr1 - (chr1 >= 65 ? 55 : 48)) << 4 | (chr2 - (chr2 >= 65 ? 55 : 48)));
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else
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bytes[j++] = (byte)((chr1 - (chr1 >= 65 ? 55 : 48)) | ((chr2 - (chr2 >= 65 ? 55 : 48)) << 4));
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}
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}
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}
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}
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}
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