justme
83e5120377
Namespaces, assemblies, projects and directories, the solution, binaries, images, systemd units, config paths, environment variables, protocol method names, the media type and the raw chunk magic all move to MoShiro/moshiro. Existing data and deployments are not compatible and must be recreated. Also fix the architecture tests after the solution layout change and make the update tests independent of their order.
36 lines
791 B
C#
36 lines
791 B
C#
namespace MoShiro.Protocol;
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/// <summary>CRC-32C（Castagnoli），RawChunk 的完整性校验。</summary>
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public static class Crc32c
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{
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private static readonly uint[] s_table = BuildTable();
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public static uint Compute(ReadOnlySpan<byte> data)
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{
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uint crc = uint.MaxValue;
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foreach (byte b in data)
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{
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crc = s_table[(crc ^ b) & 0xFF] ^ (crc >> 8);
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}
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return ~crc;
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}
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private static uint[] BuildTable()
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{
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var table = new uint[256];
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for (uint i = 0; i < 256; i++)
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{
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uint c = i;
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for (int k = 0; k < 8; k++)
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{
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c = (c & 1) != 0 ? (c >> 1) ^ 0x82F63B78u : c >> 1;
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}
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table[i] = c;
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}
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return table;
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}
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}
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