PR libgcj/9715, PR libgcj/19132:

	* java/nio/charset/Charset.java (charsetForName): Try default
	provider first.
	(availableCharsets): Re-merged.
	(providers2): Likewise.
	(defaultCharset): Likewise.
	* sources.am, Makefile.in: Rebuilt.
	* gnu/java/nio/charset/Provider.java: Removed.
	* java/io/OutputStreamWriter.java
	(OutputStreamWriter(OutputStream,Charset)): New constructor.
	(OutputStreamWriter(OutputStream,CharsetEncoder)): Likewise.
	* java/io/InputStreamReader.java
	(InputStreamReader(InputStream,CharsetDecoder)): New constructor.
	(InputStreamReader(InputStream,Charset)): Likewise.
	* gnu/gcj/convert/BytesToUnicode.java (getDecoder): Try a
	BytesToCharsetAdaptor.
	* gnu/gcj/convert/UnicodeToBytes.java (getEncoder): Try a
	CharsetToBytesAdaptor.
	* gnu/gcj/convert/CharsetToBytesAdaptor.java: New file.
	* gnu/gcj/convert/BytesToCharsetAdaptor.java: New file.
	* mauve-libgcj: Remove getEncoding exclusion.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@109294 138bc75d-0d04-0410-961f-82ee72b054a4

5 files changed, 270 insertions, 159 deletions

diff --git a/libjava/gnu/gcj/convert/BytesToCharsetAdaptor.java b/libjava/gnu/gcj/convert/BytesToCharsetAdaptor.java
new file mode 100644
index 00000000000..78ba848e118
--- /dev/null
+++ b/libjava/gnu/gcj/convert/BytesToCharsetAdaptor.java
@@ -0,0 +1,90 @@
+/* Copyright (C) 2005  Free Software Foundation
+
+This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package gnu.gcj.convert; 
+
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetDecoder;
+import java.nio.charset.CodingErrorAction;
+import java.nio.charset.CoderResult;
+import gnu.java.nio.charset.EncodingHelper;
+
+/**
+ * Adaptor class that allow any {@link Charset} to be used
+ * as a BytesToUnicode converter.
+ */
+public class BytesToCharsetAdaptor extends BytesToUnicode
+{
+  /**
+   * The CharsetDecoder that does all the work.
+   */
+  private final CharsetDecoder decoder;
+
+  /**
+   * ByteBuffer wrapper for this.buf.
+   */
+  private ByteBuffer inBuf;
+
+  /**
+   * Create a new BytesToCharsetAdaptor for the given Charset.
+   *
+   * @param cs the Charset.
+   */
+  public BytesToCharsetAdaptor(Charset cs)
+  {
+    this(cs.newDecoder());
+  }
+
+  /**
+   * Create a new BytesToCharsetAdaptor for the given CharsetDecoder.
+   *
+   * @param dec the CharsetDecoder.
+   */
+  public BytesToCharsetAdaptor(CharsetDecoder dec)
+  {
+    decoder = dec;
+    // Use default replacments on bad input so that we don't have to
+    // deal with errors.
+    decoder.onMalformedInput(CodingErrorAction.REPLACE);
+    decoder.onUnmappableCharacter(CodingErrorAction.REPLACE);
+  }
+
+  /**
+   * Return the decoder's name.  The backing Charset's name is
+   * returned.
+   *
+   * @return The name.
+   */
+  public String getName()
+  {
+    return EncodingHelper.getOldCanonical(decoder.charset().name());
+  }
+
+  public int read(char[] outbuffer, int outpos, int count)
+  {
+    if (inBuf == null || ! inBuf.hasArray() || inBuf.array() != inbuffer)
+      inBuf = ByteBuffer.wrap(inbuffer);
+    inBuf.limit(inpos + inlength);
+    inBuf.position(inpos);
+
+    CharBuffer outBuf = CharBuffer.wrap(outbuffer, outpos, count);
+    decoder.decode(inBuf, outBuf, false);
+
+    // Update this.inpos to reflect the bytes consumed.
+    inpos = inBuf.position();
+    // Return the number of characters that were written to outbuffer.
+    return outBuf.position() - outpos;
+  }
+
+  // These aren't cached.
+  public void done()
+  {
+  }
+}
diff --git a/libjava/gnu/gcj/convert/BytesToUnicode.java b/libjava/gnu/gcj/convert/BytesToUnicode.java
index f33720aa227..e3afe3ee97b 100644
--- a/libjava/gnu/gcj/convert/BytesToUnicode.java
+++ b/libjava/gnu/gcj/convert/BytesToUnicode.java
@@ -1,4 +1,4 @@
-/* Copyright (C) 1999, 2000, 2001  Free Software Foundation
+/* Copyright (C) 1999, 2000, 2001, 2005  Free Software Foundation
 
    This file is part of libgcj.
 
@@ -8,6 +8,8 @@ details.  */
 
 package gnu.gcj.convert;
 
+import java.nio.charset.Charset;
+
 public abstract class BytesToUnicode extends IOConverter
 {
   /** Buffer to read bytes from.
@@ -104,11 +106,20 @@ public abstract class BytesToUnicode extends IOConverter
 	try
 	  {
 	    // We pass the original name to iconv and let it handle
-	    // its own aliasing.
+	    // its own aliasing.  Note that we intentionally prefer
+	    // iconv over nio.
 	    return new Input_iconv (encoding);
 	  }
 	catch (Throwable _)
 	  {
+	    // Ignore, and try the next method.
+	  }
+	try
+	  {
+	    return new BytesToCharsetAdaptor(Charset.forName(encoding));
+	  }
+	catch (Throwable _)
+	  {
 	    throw new java.io.UnsupportedEncodingException(encoding
 							   + " (" + ex + ')');
 	  }
diff --git a/libjava/gnu/gcj/convert/CharsetToBytesAdaptor.java b/libjava/gnu/gcj/convert/CharsetToBytesAdaptor.java
new file mode 100644
index 00000000000..4e9bcd5b461
--- /dev/null
+++ b/libjava/gnu/gcj/convert/CharsetToBytesAdaptor.java
@@ -0,0 +1,150 @@
+/* Copyright (C) 2005, 2006  Free Software Foundation
+
+This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package gnu.gcj.convert; 
+
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetEncoder;
+import java.nio.charset.CodingErrorAction;
+import java.nio.charset.CoderResult;
+import gnu.java.nio.charset.EncodingHelper;
+
+/**
+ * Adaptor class that allow any {@link Charset} to be used
+ * as a UnicodeToBytes converter.
+ */
+public class CharsetToBytesAdaptor extends UnicodeToBytes
+{
+  /**
+   * The CharsetEncoder that does all the work.
+   */
+  private final CharsetEncoder encoder;
+
+  /**
+   * ByteBuffer wrapper for this.buf.
+   */
+  private ByteBuffer outBuf;
+
+  /**
+   * True if we've told the CharsetEncoder that there are no more
+   * characters available.
+   */
+  private boolean closedEncoder;
+
+  /**
+   * True if we're finished.
+   */
+  private boolean finished;
+
+  /**
+   * Create a new CharsetToBytesAdaptor for the given Charset.
+   *
+   * @param cs The Charset.
+   */
+  public CharsetToBytesAdaptor(Charset cs)
+  {
+    this(cs.newEncoder());
+  }
+
+  /**
+   * Create a new CharsetToBytesAdaptor for the given CharsetEncoder.
+   *
+   * @param enc The CharsetEncoder.
+   */
+  public CharsetToBytesAdaptor(CharsetEncoder enc)
+  {
+    encoder = enc;
+    // Use default replacments on bad input so that we don't have to
+    // deal with errors.
+    encoder.onMalformedInput(CodingErrorAction.REPLACE);
+    encoder.onUnmappableCharacter(CodingErrorAction.REPLACE);
+  }
+
+  /**
+   * Return the encoder's name.  The backing Charset's name is
+   * returned.
+   *
+   * @return The name.
+   */
+  public String getName()
+  {
+    return EncodingHelper.getOldCanonical(encoder.charset().name());
+  }
+
+  public int write (char[] inbuffer, int inpos, int inlength)
+  {
+    // Wrap the char array so it can be used by the encoder.
+    CharBuffer b = CharBuffer.wrap(inbuffer, inpos, inlength);
+    write(b);
+    return b.position() - inpos; // Number of chars consumed.
+  }
+
+  public int write (String str, int inpos, int inlength, char work)
+  {
+    // Wrap the String so it can be used by the encoder.
+    CharBuffer b = CharBuffer.wrap(str, inpos, inlength);
+    write(b);
+    return b.position() - inpos; // Number of chars consumed.
+  }
+
+  /**
+   * Encode as much of inBuf as will fit in buf.  The number of
+   * chars consumed is reflected by the new position of inBuf.  The
+   * output is put in buf and count is incremented by the number of
+   * bytes written.
+   *
+   * @param inBuf The input.
+   */
+  private void write(CharBuffer inBuf)
+  {
+    // Reuse existing outBuf if it is still wrapping the same array
+    // it was created with.
+    if (outBuf == null || !outBuf.hasArray() || outBuf.array() != buf)
+      outBuf = ByteBuffer.wrap(buf);
+
+    // Set the current position.
+    outBuf.position(count);
+
+    // If we've already said that there is no more input available,
+    // then we simply try to flush again.
+    if (closedEncoder)
+      {
+	CoderResult result = encoder.flush(outBuf);
+	if (result == CoderResult.UNDERFLOW)
+	  finished = true;
+       }
+    else
+      {
+	// Do the conversion.  If there are no characters to write,
+	// then we are finished.
+	closedEncoder = ! inBuf.hasRemaining();
+	encoder.encode(inBuf, outBuf, closedEncoder);
+      }
+
+    // Mark the new end of buf.
+    count = outBuf.position();
+  }
+
+  /**
+   * Check for cached output in the converter.
+   *
+   * @return true if there is cached output that has not been
+   * written to buf.
+   */
+  public boolean havePendingBytes()
+  {
+    return ! finished;
+  }
+
+  // These aren't cached.
+  public void done()
+  {
+  }
+}
diff --git a/libjava/gnu/gcj/convert/UnicodeToBytes.java b/libjava/gnu/gcj/convert/UnicodeToBytes.java
index b1432586ce5..8522bec117a 100644
--- a/libjava/gnu/gcj/convert/UnicodeToBytes.java
+++ b/libjava/gnu/gcj/convert/UnicodeToBytes.java
@@ -1,4 +1,4 @@
-/* Copyright (C) 1999, 2000, 2001, 2003  Free Software Foundation
+/* Copyright (C) 1999, 2000, 2001, 2003, 2005  Free Software Foundation
 
    This file is part of libgcj.
 
@@ -8,6 +8,8 @@ details.  */
 
 package gnu.gcj.convert; 
 
+import java.nio.charset.Charset;
+
 public abstract class UnicodeToBytes extends IOConverter
 {
   /** Buffer to emit bytes to.
@@ -99,10 +101,22 @@ public abstract class UnicodeToBytes extends IOConverter
     catch (Throwable ex) 
       { 
 	try
-	  {
+          {
 	    // We pass the original name to iconv and let it handle
-	    // its own aliasing.
+	    // its own aliasing.  Note that we intentionally prefer
+	    // iconv over nio.
 	    return new Output_iconv (encoding);
+          }
+        catch (Throwable _)
+          {
+            // Ignore, and try the next method.
+          }
+	try
+	  {
+            // Try using finding java.nio.charset.Charset and using
+            // the adaptor.  Use the original name as Charsets have
+            // their own canonical names.
+            return new CharsetToBytesAdaptor(Charset.forName(encoding));
 	  }
 	catch (Throwable _)
 	  {
diff --git a/libjava/gnu/java/nio/charset/Provider.java b/libjava/gnu/java/nio/charset/Provider.java
deleted file mode 100644
index 586a09e1a1b..00000000000
--- a/libjava/gnu/java/nio/charset/Provider.java
+++ /dev/null
@@ -1,154 +0,0 @@
-/* Provider.java -- 
-   Copyright (C) 2002, 2005 Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING.  If not, write to the
-Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library.  Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module.  An independent module is a module which is not derived from
-or based on this library.  If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so.  If you do not wish to do so, delete this
-exception statement from your version. */
-
-package gnu.java.nio.charset;
-
-import java.nio.charset.Charset;
-import java.nio.charset.spi.CharsetProvider;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.Iterator;
-
-/**
- * Charset provider for the required charsets.  Used by
- * {@link Charset#charsetForName} and * {@link Charset#availableCharsets}.
- *
- * @author Jesse Rosenstock
- * @author Robert Schuster (thebohemian@gmx.net)
- * @see Charset
- */
-public final class Provider extends CharsetProvider
-{
-  private static Provider singleton;
-
-  static
-  {
-    synchronized (Provider.class)
-      {
-        singleton = null;
-      }
-  }
-
-  /**
-   * Map from charset name to charset canonical name. The strings
-   * are all lower-case to allow case-insensitive retrieval of
-   * Charset instances. 
-   */
-  private final HashMap canonicalNames;
-
-  /**
-   * Map from lower-case canonical name to Charset.
-   * TODO: We may want to use soft references.  We would then need to keep
-   * track of the class name to regenerate the object.
-   */
-  private final HashMap charsets;
-
-  private Provider ()
-  {
-    canonicalNames = new HashMap ();
-    charsets = new HashMap ();
-
-    // US-ASCII aka ISO646-US
-    addCharset (new US_ASCII ());
-
-    // ISO-8859-1 aka ISO-LATIN-1
-    addCharset (new ISO_8859_1 ());
-
-    // UTF-8
-    addCharset (new UTF_8 ());
-
-    // UTF-16BE
-    addCharset (new UTF_16BE ());
-
-    // UTF-16LE
-    addCharset (new UTF_16LE ());
-
-    // UTF-16
-    addCharset (new UTF_16 ());
-  }
-
-  public Iterator charsets ()
-  {
-    return Collections.unmodifiableCollection (charsets.values ())
-                      .iterator ();
-  }
-
-  /**
-   * Returns a Charset instance by converting the given
-   * name to lower-case, looking up the canonical charset
-   * name and finally looking up the Charset with that name.
-   * 
-   * <p>The lookup is therefore case-insensitive.</p>
-   * 
-   *  @returns The Charset having <code>charsetName</code>
-   *  as its alias or null if no such Charset exist.
-   */
-  public Charset charsetForName (String charsetName)
-  {
-    return (Charset) charsets.get(canonicalNames.get(charsetName.toLowerCase()));
-  }
-
-  /**
-   * Puts a Charset under its canonical name into the 'charsets' map.
-   * Then puts a mapping from all its alias names to the canonical name.
-   * 
-   * <p>All names are converted to lower-case</p>.
-   * 
-   * @param cs
-   */
-  private void addCharset (Charset cs)
-  {
-    String canonicalName = cs.name().toLowerCase();
-    charsets.put (canonicalName, cs);
-    
-    /* Adds a mapping between the canonical name
-     * itself making a lookup using that name
-     * no special case.
-     */  
-    canonicalNames.put(canonicalName, canonicalName);
-
-    for (Iterator i = cs.aliases ().iterator (); i.hasNext (); )
-      canonicalNames.put (((String) i.next()).toLowerCase(), canonicalName);
-  }
-
-  public static synchronized Provider provider ()
-  {
-    if (singleton == null)
-      singleton = new Provider ();
-    return singleton;
-  }
-}