Imported Upstream version 3.10.0

Former-commit-id: 172c8e3c300b39d5785c7a3e8dfb08ebdbc1a99b

mcs/class/corlib/System.Text/EncodingEncoder.cs

@@ -0,0 +1,99 @@
+//
+// System.Text.EncodingEncoder.cs
+//
+// Authors:
+//   Marcos Henrich (marcos.henrich@xamarin.com)
+//
+// Copyright (C) 2014 Xamarin Inc (http://www.xamarin.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace System.Text {
+
+abstract class EncodingEncoder : Encoder {
+	protected readonly Encoding encoding;
+
+	// Constructor.
+	protected EncodingEncoder (Encoding encoding)
+	{
+		this.encoding = encoding;
+		var fallback = encoding.EncoderFallback;
+		if (fallback != null)
+			Fallback = fallback;
+	}
+
+	public unsafe override void Convert (
+		char* chars, int charCount,
+		byte* bytes, int byteCount, bool flush,
+		out int charsUsed, out int bytesUsed, out bool completed)
+	{
+		if (chars == null)
+			throw new ArgumentNullException ("chars");
+		if (bytes == null)
+			throw new ArgumentNullException ("bytes");
+		if (charCount < 0)
+			throw new ArgumentOutOfRangeException ("charCount");
+		if (byteCount < 0)
+			throw new ArgumentOutOfRangeException ("byteCount");
+
+		charsUsed = encoding.GetCharCount (bytes, byteCount);
+
+		if (charsUsed > charCount)
+			charsUsed = charCount;
+
+		bytesUsed = encoding.GetBytes (chars, charsUsed, bytes, byteCount);
+
+		completed = charsUsed == charCount;
+	}
+
+	public override void Convert (
+		char [] chars, int charIndex, int charCount,
+		byte [] bytes, int byteIndex, int byteCount, bool flush,
+		out int charsUsed, out int bytesUsed, out bool completed)
+	{
+		if (chars == null)
+			throw new ArgumentNullException ("chars");
+		if (bytes == null)
+			throw new ArgumentNullException ("bytes");
+		if (charIndex < 0)
+			throw new ArgumentOutOfRangeException ("charIndex");
+		if (charCount < 0 || chars.Length < charIndex + charCount)
+			throw new ArgumentOutOfRangeException ("charCount");
+		if (byteIndex < 0)
+			throw new ArgumentOutOfRangeException ("byteIndex");
+		if (byteCount < 0 || bytes.Length < byteIndex + byteCount)
+			throw new ArgumentOutOfRangeException ("byteCount");
+
+		charsUsed = encoding.GetCharCount (bytes, byteIndex, byteCount);
+
+		if (charsUsed > charCount)
+			charsUsed = charCount;
+
+		bytesUsed = encoding.GetBytes (chars, charIndex, charsUsed, bytes, byteIndex);
+
+		completed = charsUsed == charCount;
+	}
+}; // class EncodingEncoder
+
+}; // namespace System.Text