{
using System;
+using System.Runtime.InteropServices;
[Serializable]
+#if NET_2_0
+[ComVisible (true)]
+#endif
public abstract class Encoder
{
protected Encoder() {}
#if NET_2_0
- EncoderFallback fallback;
+ EncoderFallback fallback = new EncoderReplacementFallback ();
+ EncoderFallbackBuffer fallback_buffer;
+ [ComVisible (false)]
public EncoderFallback Fallback {
get { return fallback; }
set {
if (value == null)
throw new ArgumentNullException ();
fallback = value;
+ fallback_buffer = null;
+ }
+ }
+
+ [ComVisible (false)]
+ public EncoderFallbackBuffer FallbackBuffer {
+ get {
+ if (fallback_buffer == null)
+ fallback_buffer = Fallback.CreateFallbackBuffer ();
+ return fallback_buffer;
}
}
#endif
public abstract int GetBytes(char[] chars, int charIndex, int charCount,
byte[] bytes, int byteIndex, bool flush);
+#if NET_2_0
+ [CLSCompliant (false)]
+ [ComVisible (false)]
+ public unsafe virtual int GetByteCount (char* chars, int charCount, bool flush)
+ {
+ if (chars == null)
+ throw new ArgumentNullException ("chars");
+ if (charCount < 0)
+ throw new ArgumentOutOfRangeException ("charCount");
+
+ char [] carr = new char [charCount];
+ Marshal.Copy ((IntPtr) chars, carr, 0, charCount);
+ return GetByteCount (carr, 0, charCount, flush);
+ }
+
+ [CLSCompliant (false)]
+ [ComVisible (false)]
+ public unsafe virtual int GetBytes (char* chars, int charCount,
+ byte* bytes, int byteCount, bool flush)
+ {
+ CheckArguments (chars, charCount, bytes, byteCount);
+
+ char [] carr = new char [charCount];
+ Marshal.Copy ((IntPtr) chars, carr, 0, charCount);
+ byte [] barr = new byte [byteCount];
+ Marshal.Copy ((IntPtr) bytes, barr, 0, byteCount);
+ return GetBytes (carr, 0, charCount, barr, 0, flush);
+ }
+
+ [ComVisible (false)]
+ public virtual void Reset ()
+ {
+ if (fallback_buffer != null)
+ fallback_buffer.Reset ();
+ }
+
+ [CLSCompliant (false)]
+ [ComVisible (false)]
+ public unsafe virtual void Convert (
+ char* chars, int charCount,
+ byte* bytes, int byteCount, bool flush,
+ out int charsUsed, out int bytesUsed, out bool completed)
+ {
+ CheckArguments (chars, charCount, bytes, byteCount);
+
+ charsUsed = charCount;
+ while (true) {
+ bytesUsed = GetByteCount (chars, charsUsed, flush);
+ if (bytesUsed <= byteCount)
+ break;
+ flush = false;
+ charsUsed >>= 1;
+ }
+ completed = charsUsed == charCount;
+ bytesUsed = GetBytes (chars, charsUsed, bytes, byteCount, flush);
+ }
+
+ [ComVisible (false)]
+ public virtual 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 || chars.Length <= charIndex)
+ throw new ArgumentOutOfRangeException ("charIndex");
+ if (charCount < 0 || chars.Length < charIndex + charCount)
+ throw new ArgumentOutOfRangeException ("charCount");
+ if (byteIndex < 0 || bytes.Length <= byteIndex)
+ throw new ArgumentOutOfRangeException ("byteIndex");
+ if (byteCount < 0 || bytes.Length < byteIndex + byteCount)
+ throw new ArgumentOutOfRangeException ("byteCount");
+
+ charsUsed = charCount;
+ while (true) {
+ bytesUsed = GetByteCount (chars, charIndex, charsUsed, flush);
+ if (bytesUsed <= byteCount)
+ break;
+ flush = false;
+ charsUsed >>= 1;
+ }
+ completed = charsUsed == charCount;
+ bytesUsed = GetBytes (chars, charIndex, charsUsed, bytes, byteIndex, flush);
+ }
+
+ unsafe void CheckArguments (char* chars, int charCount, byte* bytes, int byteCount)
+ {
+ 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");
+ }
+#endif
}; // class Encoder
}; // namespace System.Text