Initial Commit

iTechSharp/srcbc/util/io/BaseInputStream.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+
+namespace Org.BouncyCastle.Utilities.IO
+{
+    public abstract class BaseInputStream : Stream
+    {
+		private bool closed;
+
+		public sealed override bool CanRead { get { return !closed; } }
+        public sealed override bool CanSeek { get { return false; } }
+        public sealed override bool CanWrite { get { return false; } }
+		public override void Close() { closed = true; }
+		public sealed override void Flush() {}
+        public sealed override long Length { get { throw new NotSupportedException(); } }
+        public sealed override long Position
+        {
+            get { throw new NotSupportedException(); }
+            set { throw new NotSupportedException(); }
+        }
+
+        public override int Read(byte[] buffer, int offset, int count)
+        {
+            int pos = offset;
+            try
+            {
+                int end = offset + count;
+                while (pos < end)
+                {
+                    int b = ReadByte();
+                    if (b == -1) break;
+                    buffer[pos++] = (byte) b;
+                }
+            }
+            catch (IOException)
+            {
+                if (pos == offset) throw;
+            }
+            return pos - offset;
+        }
+
+        public sealed override long Seek(long offset, SeekOrigin origin) { throw new NotSupportedException(); }
+        public sealed override void SetLength(long value) { throw new NotSupportedException(); }
+        public sealed override void Write(byte[] buffer, int offset, int count) { throw new NotSupportedException(); }
+    }
+}

iTechSharp/srcbc/util/io/BaseOutputStream.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+
+namespace Org.BouncyCastle.Utilities.IO
+{
+    public abstract class BaseOutputStream : Stream
+    {
+		private bool closed;
+
+		public sealed override bool CanRead { get { return false; } }
+        public sealed override bool CanSeek { get { return false; } }
+        public sealed override bool CanWrite { get { return !closed; } }
+		public override void Close() { closed = true; }
+        public override void Flush() {}
+        public sealed override long Length { get { throw new NotSupportedException(); } }
+        public sealed override long Position
+        {
+            get { throw new NotSupportedException(); }
+            set { throw new NotSupportedException(); }
+        }
+        public sealed override int Read(byte[] buffer, int offset, int count) { throw new NotSupportedException(); }
+        public sealed override long Seek(long offset, SeekOrigin origin) { throw new NotSupportedException(); }
+        public sealed override void SetLength(long value) { throw new NotSupportedException(); }
+
+        public override void Write(byte[] buffer, int offset, int count)
+        {
+            Debug.Assert(buffer != null);
+            Debug.Assert(0 <= offset && offset <= buffer.Length);
+            Debug.Assert(count >= 0);
+
+            int end = offset + count;
+
+            Debug.Assert(0 <= end && end <= buffer.Length);
+
+            for (int i = offset; i < end; ++i)
+            {
+                this.WriteByte(buffer[i]);
+            }
+        }
+
+		public virtual void Write(params byte[] buffer)
+		{
+			Write(buffer, 0, buffer.Length);
+		}
+	}
+}

iTechSharp/srcbc/util/io/PushbackStream.cs

@@ -0,0 +1,52 @@
+using System;
+using System.IO;
+
+using Org.BouncyCastle.Asn1.Utilities;
+
+namespace Org.BouncyCastle.Utilities.IO
+{
+	public class PushbackStream
+		: FilterStream
+	{
+		private int buf = -1;
+
+		public PushbackStream(
+			Stream s)
+			: base(s)
+		{
+		}
+
+		public override int ReadByte()
+		{
+			if (buf != -1)
+			{
+				int tmp = buf;
+				buf = -1;
+				return tmp;
+			}
+
+			return base.ReadByte();
+		}
+
+		public override int Read(byte[] buffer, int offset, int count)
+		{
+			if (buf != -1 && count > 0)
+			{
+				// TODO Can this case be made more efficient?
+				buffer[offset] = (byte) buf;
+				buf = -1;
+				return 1;
+			}
+
+			return base.Read(buffer, offset, count);
+		}
+
+		public virtual void Unread(int b)
+		{
+			if (buf != -1)
+				throw new InvalidOperationException("Can only push back one byte");
+
+			buf = b & 0xFF;
+		}
+	}
+}

iTechSharp/srcbc/util/io/Streams.cs

@@ -0,0 +1,57 @@
+using System;
+using System.IO;
+
+namespace Org.BouncyCastle.Utilities.IO
+{
+	public sealed class Streams
+	{
+		private const int BufferSize = 512;
+
+		private Streams()
+		{
+		}
+
+		public static void Drain(Stream inStr)
+		{
+			byte[] bs = new byte[BufferSize];
+			while (inStr.Read(bs, 0, bs.Length) > 0)
+			{
+			}
+		}
+
+		public static byte[] ReadAll(Stream inStr)
+		{
+			MemoryStream buf = new MemoryStream();
+			PipeAll(inStr, buf);
+			return buf.ToArray();
+		}
+
+		public static int ReadFully(Stream inStr, byte[] buf)
+		{
+			return ReadFully(inStr, buf, 0, buf.Length);
+		}
+
+		public static int ReadFully(Stream inStr, byte[] buf, int off, int len)
+		{
+			int totalRead = 0;
+			while (totalRead < len)
+			{
+				int numRead = inStr.Read(buf, off + totalRead, len - totalRead);
+				if (numRead < 1)
+					break;
+				totalRead += numRead;
+			}
+			return totalRead;
+		}
+
+		public static void PipeAll(Stream inStr, Stream outStr)
+		{
+			byte[] bs = new byte[BufferSize];
+			int numRead;
+			while ((numRead = inStr.Read(bs, 0, bs.Length)) > 0)
+			{
+				outStr.Write(bs, 0, numRead);
+			}
+		}
+	}
+}