2 // EncoderReplacementFallbackBuffer.cs
5 // Atsushi Enomoto <atsushi@ximian.com>
9 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
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33 // This EncoderFallbackBuffer is simple. It ignores the input buffers.
34 // EncoderFallbackBuffer users could implement their own complex
37 public sealed class EncoderReplacementFallbackBuffer
38 : EncoderFallbackBuffer
42 bool fallback_assigned;
44 public EncoderReplacementFallbackBuffer (
45 EncoderReplacementFallback fallback)
48 throw new ArgumentNullException ("fallback");
49 replacement = fallback.DefaultString;
53 public override int Remaining {
54 get { return replacement.Length - current; }
57 public override bool Fallback (char charUnknown, int index)
59 return Fallback (index);
62 public override bool Fallback (char charUnknownHigh, char charUnknownLow, int index)
64 return Fallback (index);
67 // hmm, what is this index for???
68 private bool Fallback (int index)
70 if (fallback_assigned && Remaining != 0)
71 throw new ArgumentException ("Reentrant Fallback method invocation occured. It might be because either this FallbackBuffer is incorrectly shared by multiple threads, invoked inside Encoding recursively, or Reset invocation is forgotten.");
73 throw new ArgumentOutOfRangeException ("index");
74 fallback_assigned = true;
77 return replacement.Length > 0;
80 public override char GetNextChar ()
82 if (current >= replacement.Length)
84 return replacement [current++];
87 public override bool MovePrevious ()
95 public override void Reset ()