initial commit

2026-08-27 11:22:54 -06:00
commit 3d81b11e14
2281 changed files with 54227 additions and 0 deletions
@@ -0,0 +1,32 @@
+namespace Crysome.Common.Network.FileTransfer;
+
+internal static class Crc32
+{
+	private static readonly uint[] _table = Build();
+
+	private static uint[] Build()
+	{
+		uint[] array = new uint[256];
+		for (uint num = 0u; num < 256; num++)
+		{
+			uint num2 = num;
+			for (int i = 0; i < 8; i++)
+			{
+				num2 = (((num2 & 1) != 0) ? (0xEDB88320u ^ (num2 >> 1)) : (num2 >> 1));
+			}
+			array[num] = num2;
+		}
+		return array;
+	}
+
+	internal static uint Compute(byte[] data, int offset, int len)
+	{
+		uint num = uint.MaxValue;
+		int num2 = offset + len;
+		for (int i = offset; i < num2; i++)
+		{
+			num = (num >> 8) ^ _table[(num ^ data[i]) & 0xFF];
+		}
+		return num ^ 0xFFFFFFFFu;
+	}
+}