merge from trunk at 97714

[mono.git] / mcs / class / corlib / System.Text / Decoder.cs

diff --git a/mcs/class/corlib/System.Text/Decoder.cs b/mcs/class/corlib/System.Text/Decoder.cs
index d8d4c5bfad191720539d43d1e64054971e792402..74062465718f4c05303dfe4d855bbcbf831dd165 100644 (file)
--- a/mcs/class/corlib/System.Text/Decoder.cs
+++ b/mcs/class/corlib/System.Text/Decoder.cs
@@ -26,14 +26,43 @@ namespace System.Text
 {
 
 using System;
+using System.Runtime.InteropServices;
 
 [Serializable]
+#if NET_2_0
+[ComVisible (true)]
+#endif
 public abstract class Decoder
 {
 
        // Constructor.
        protected Decoder () {}
 
+#if NET_2_0
+       DecoderFallback fallback = new DecoderReplacementFallback ();
+       DecoderFallbackBuffer fallback_buffer;
+
+       [ComVisible (false)]
+       public DecoderFallback Fallback {
+               get { return fallback; }
+               set {
+                       if (value == null)
+                               throw new ArgumentNullException ();
+                       fallback = value;
+                       fallback_buffer = null;
+               }
+       }
+
+       [ComVisible (false)]
+       public DecoderFallbackBuffer FallbackBuffer {
+               get {
+                       if (fallback_buffer == null)
+                               fallback_buffer = fallback.CreateFallbackBuffer ();
+                       return fallback_buffer;
+               }
+       }
+#endif
+
        // Get the number of characters needed to decode a buffer.
        public abstract int GetCharCount (byte[] bytes, int index, int count);
 
@@ -41,6 +70,137 @@ public abstract class Decoder
        public abstract int GetChars (byte[] bytes, int byteIndex, int byteCount,
                                                                 char[] chars, int charIndex);
 
+#if NET_2_0
+       [ComVisible (false)]
+       public virtual int GetCharCount (byte [] bytes, int index, int count, bool flush)
+       {
+               if (flush)
+                       Reset ();
+               return GetCharCount (bytes, index, count);
+       }
+
+       [CLSCompliant (false)]
+       [ComVisible (false)]
+       public unsafe virtual int GetCharCount (byte* bytes, int count, bool flush)
+       {
+               if (bytes == null)
+                       throw new ArgumentNullException ("bytes");
+               if (count < 0)
+                       throw new ArgumentOutOfRangeException ("count");
+
+               byte [] barr = new byte [count];
+               Marshal.Copy ((IntPtr) bytes, barr, 0, count);
+               return GetCharCount (barr, 0, count, flush);
+       }
+
+       public virtual int GetChars (
+               byte[] bytes, int byteIndex, int byteCount,
+               char[] chars, int charIndex, bool flush)
+       {
+               CheckArguments (bytes, byteIndex, byteCount);
+               CheckArguments (chars, charIndex);
+
+               if (flush)
+                       Reset ();
+               return GetChars (bytes, byteIndex, byteCount, chars, charIndex);
+       }
+
+       [CLSCompliant (false)]
+       [ComVisible (false)]
+       public unsafe virtual int GetChars (byte* bytes, int byteCount,
+               char* chars, int charCount, 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 GetChars (barr, 0, byteCount, carr, 0, flush);
+       }
+
+       [ComVisible (false)]
+       public virtual void Reset ()
+       {
+               if (fallback_buffer != null)
+                       fallback_buffer.Reset ();
+       }
+
+       [CLSCompliant (false)]
+       [ComVisible (false)]
+       public unsafe virtual void Convert (
+               byte* bytes, int byteCount,
+               char* chars, int charCount, bool flush,
+               out int bytesUsed, out int charsUsed, out bool completed)
+       {
+               CheckArguments (chars, charCount, bytes, byteCount);
+
+               bytesUsed = byteCount;
+               while (true) {
+                       charsUsed = GetCharCount (bytes, bytesUsed, flush);
+                       if (charsUsed <= charCount)
+                               break;
+                       flush = false;
+                       bytesUsed >>= 1;
+               }
+               completed = bytesUsed == byteCount;
+               charsUsed = GetChars (bytes, bytesUsed, chars, charCount, flush);
+       }
+
+       [ComVisible (false)]
+       public virtual void Convert (
+               byte [] bytes, int byteIndex, int byteCount,
+               char [] chars, int charIndex, int charCount, bool flush,
+               out int bytesUsed, out int charsUsed, out bool completed)
+       {
+               CheckArguments (bytes, byteIndex, byteCount);
+               CheckArguments (chars, charIndex);
+               if (charCount < 0 || chars.Length < charIndex + charCount)
+                       throw new ArgumentOutOfRangeException ("charCount");
+
+               bytesUsed = byteCount;
+               while (true) {
+                       charsUsed = GetCharCount (bytes, byteIndex, bytesUsed, flush);
+                       if (charsUsed <= charCount)
+                               break;
+                       flush = false;
+                       bytesUsed >>= 1;
+               }
+               completed = bytesUsed == byteCount;
+               charsUsed = GetChars (bytes, byteIndex, bytesUsed, chars, charIndex, flush);
+       }
+
+       void CheckArguments (char [] chars, int charIndex)
+       {
+               if (chars == null)
+                       throw new ArgumentNullException ("chars");
+               if (charIndex < 0 || chars.Length <= charIndex)
+                       throw new ArgumentOutOfRangeException ("charIndex");
+       }
+
+       void CheckArguments (byte [] bytes, int byteIndex, int byteCount)
+       {
+               if (bytes == null)
+                       throw new ArgumentNullException ("bytes");
+               if (byteIndex < 0 || bytes.Length <= byteIndex)
+                       throw new ArgumentOutOfRangeException ("byteIndex");
+               if (byteCount < 0 || bytes.Length < byteIndex + byteCount)
+                       throw new ArgumentOutOfRangeException ("byteCount");
+       }
+
+       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 Decoder
 
 }; // namespace System.Text