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常用工具集/Utility/ICSharpCode.SharpZipLib/Checksum/IChecksum.cs

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+using System;
+
+namespace ICSharpCode.SharpZipLib.Checksum
+{
+	/// <summary>
+	/// Interface to compute a data checksum used by checked input/output streams.
+	/// A data checksum can be updated by one byte or with a byte array. After each
+	/// update the value of the current checksum can be returned by calling
+	/// <code>getValue</code>. The complete checksum object can also be reset
+	/// so it can be used again with new data.
+	/// </summary>
+	public interface IChecksum
+	{
+		/// <summary>
+		/// Resets the data checksum as if no update was ever called.
+		/// </summary>
+		void Reset();
+
+		/// <summary>
+		/// Returns the data checksum computed so far.
+		/// </summary>
+		long Value
+		{
+			get;
+		}
+
+		/// <summary>
+		/// Adds one byte to the data checksum.
+		/// </summary>
+		/// <param name = "bval">
+		/// the data value to add. The high byte of the int is ignored.
+		/// </param>
+		void Update(int bval);
+
+		/// <summary>
+		/// Updates the data checksum with the bytes taken from the array.
+		/// </summary>
+		/// <param name="buffer">
+		/// buffer an array of bytes
+		/// </param>
+		void Update(byte[] buffer);
+
+		/// <summary>
+		/// Adds the byte array to the data checksum.
+		/// </summary>
+		/// <param name = "segment">
+		/// The chunk of data to add
+		/// </param>
+		void Update(ArraySegment<byte> segment);
+	}
+}