Replace old charset with NIO charset

teavm-classlib/src/main/java/org/teavm/classlib/impl/charset/ByteBuffer.java

@@ -1,74 +0,0 @@
-/*
- *  Copyright 2013 Alexey Andreev.
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *       http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-package org.teavm.classlib.impl.charset;
-
-/**
- *
- * @author Alexey Andreev
- */
-public class ByteBuffer {
-    private byte[] data;
-    private int end;
-    private int pos;
-
-    public ByteBuffer(byte[] data) {
-        this(data, 0, data.length);
-    }
-
-    public ByteBuffer(byte[] data, int start, int end) {
-        this.data = data;
-        this.end = end;
-        this.pos = start;
-    }
-
-    public void put(byte b) {
-        data[pos++] = b;
-    }
-
-    public void rewind(int start) {
-        this.pos = start;
-    }
-
-    public int available() {
-        return end - pos;
-    }
-
-    public void back(int count) {
-        pos -= count;
-    }
-
-    public boolean end() {
-        return pos == end;
-    }
-
-    public void skip(int count) {
-        pos += count;
-    }
-
-    public byte get() {
-        return data[pos++];
-    }
-
-    public int position() {
-        return pos;
-    }
-
-    public void put(ByteBuffer buffer) {
-        while (buffer.pos < buffer.end) {
-            data[pos++] = buffer.data[buffer.pos++];
-        }
-    }
-}

teavm-classlib/src/main/java/org/teavm/classlib/impl/charset/CharBuffer.java

@@ -1,75 +0,0 @@
-/*
- *  Copyright 2013 Alexey Andreev.
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *       http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-package org.teavm.classlib.impl.charset;
-
-/**
- *
- * @author Alexey Andreev
- */
-public class CharBuffer {
-    private char[] data;
-    private int end;
-    private int pos;
-
-    public CharBuffer(char[] data, int start, int end) {
-        this.data = data;
-        this.end = end;
-        this.pos = start;
-    }
-
-    public CharBuffer(char[] data) {
-        this(data, 0, data.length);
-    }
-
-    public void put(char b) {
-        data[pos++] = b;
-    }
-
-    public void rewind(int start) {
-        this.pos = start;
-    }
-
-    public int available() {
-        return end - pos;
-    }
-
-    public void back(int count) {
-        pos -= count;
-    }
-
-    public boolean end() {
-        return pos == end;
-    }
-
-    public char get() {
-        return data[pos++];
-    }
-
-    public int position() {
-        return pos;
-    }
-
-    public void skip(int count) {
-        pos += count;
-    }
-
-    public void put(CharBuffer buffer) {
-        int sz = Math.min(buffer.end - buffer.pos, end - pos);
-        for (int i = 0; i < sz; ++i) {
-            data[pos++] = buffer.data[buffer.pos++];
-        }
-    }
-}

teavm-classlib/src/main/java/org/teavm/classlib/impl/charset/Charset.java

@@ -1,33 +0,0 @@
-/*
- *  Copyright 2013 Alexey Andreev.
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *       http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-package org.teavm.classlib.impl.charset;
-
-/**
- *
- * @author Alexey Andreev
- */
-public abstract class Charset {
-    public abstract void encode(CharBuffer source, ByteBuffer dest);
-
-    public abstract void decode(ByteBuffer source, CharBuffer dest);
-
-    public static Charset get(String name) {
-        if (name.toUpperCase().equals("UTF-8")) {
-            return new UTF8Charset();
-        }
-        return null;
-    }
-}

teavm-classlib/src/main/java/org/teavm/classlib/impl/charset/UTF8Charset.java

@@ -1,91 +0,0 @@
-/*
- *  Copyright 2013 Alexey Andreev.
- *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
- *
- *       http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
- */
-package org.teavm.classlib.impl.charset;
-
-/**
- *
- * @author Alexey Andreev
- */
-public class UTF8Charset extends Charset {
-    @Override
-    public void encode(CharBuffer source, ByteBuffer dest) {
-        while (!source.end() && dest.available() >= 4) {
-            char ch = source.get();
-            if (ch < 0x80) {
-                dest.put((byte)ch);
-            } else if (ch < 0x400) {
-                dest.put((byte)(0xC0 | (ch >> 6)));
-                dest.put((byte)(0x80 | (ch & 0x3F)));
-            } else if (!Character.isSurrogate(ch)) {
-                dest.put((byte)(0xE0 | (ch >> 12)));
-                dest.put((byte)(0x80 | ((ch >> 6) & 0x3F)));
-                dest.put((byte)(0x80 | (ch & 0x3F)));
-            } else if (Character.isHighSurrogate(ch)) {
-                char low = source.get();
-                if (!Character.isLowSurrogate(low)) {
-                    source.back(1);
-                    dest.put((byte)'?');
-                } else {
-                    int codePoint = Character.toCodePoint(ch, low);
-                    dest.put((byte)(0xF0 | (codePoint >> 18)));
-                    dest.put((byte)(0x80 | ((codePoint >> 12) & 0x3F)));
-                    dest.put((byte)(0x80 | ((codePoint >> 6) & 0x3F)));
-                    dest.put((byte)(0x80 | (codePoint & 0x3F)));
-                }
-            } else {
-                dest.put((byte)'?');
-            }
-        }
-    }
-
-    @Override
-    public void decode(ByteBuffer source, CharBuffer dest) {
-        while (!source.end() && dest.available() >= 2) {
-            int b = source.get() & 0xFF;
-            if ((b & 0x80) == 0) {
-                dest.put((char)b);
-            } else if ((b & 0xE0) == 0xC0) {
-                if (source.end()) {
-                    dest.put((char)b);
-                    return;
-                }
-                dest.put((char)(((b & 0x1F) << 6) | (source.get() & 0x3F)));
-            } else if ((b & 0xF0) == 0xE0) {
-                if (source.available() < 2) {
-                    source.skip(source.available());
-                    dest.put((char)b);
-                    return;
-                }
-                byte b2 = source.get();
-                byte b3 = source.get();
-                char c = (char)(((b & 0x0F) << 12) | ((b2 & 0x3f) << 6) | (b3 & 0x3F));
-                dest.put(!Character.isHighSurrogate(c) ? c : '?');
-            } else if ((b & 0xF8) == 0xF0) {
-                if (source.available() < 3) {
-                    source.skip(source.available());
-                    dest.put((char)b);
-                    return;
-                }
-                byte b2 = source.get();
-                byte b3 = source.get();
-                byte b4 = source.get();
-                int code = ((b & 0x07) << 18) | ((b2 & 0x3f) << 12) | ((b3 & 0x3F) << 6) | (b4 & 0x3F);
-                dest.put(Character.highSurrogate(code));
-                dest.put(Character.lowSurrogate(code));
-            }
-        }
-    }
-}

teavm-classlib/src/main/java/org/teavm/classlib/java/io/TInputStreamReader.java

@@ -21,6 +21,7 @@ import org.teavm.classlib.java.nio.TCharBuffer;
 import org.teavm.classlib.java.nio.charset.TCharset;
 import org.teavm.classlib.java.nio.charset.TCharsetDecoder;
 import org.teavm.classlib.java.nio.charset.TCodingErrorAction;
+import org.teavm.classlib.java.nio.charset.TUnsupportedCharsetException;
 import org.teavm.classlib.java.nio.charset.impl.TUTF8Charset;
 
 /**
@@ -29,8 +30,7 @@ import org.teavm.classlib.java.nio.charset.impl.TUTF8Charset;
  */
 public class TInputStreamReader extends TReader {
     private TInputStream stream;
-    private TCharset charset;
+    private TCharsetDecoder decoder;
-    private TString charsetName;
     private byte[] inData = new byte[8192];
     private TByteBuffer inBuffer = TByteBuffer.wrap(inData);
     private char[] outData = new char[1024];
@@ -38,25 +38,37 @@ public class TInputStreamReader extends TReader {
     private boolean streamEof;
     private boolean eof;
 
-    public TInputStreamReader(TInputStream in, TString charsetName) {
+    public TInputStreamReader(TInputStream in, TString charsetName) throws TUnsupportedEncodingException {
-        this(in, TCharset.forName(charsetName.toString()));
+        this(in, getCharset(charsetName));
-        this.charsetName = charsetName;
+    }
+
+    public TInputStreamReader(TInputStream in, TCharset charset) {
+        this(in, charset.newDecoder()
+                .onMalformedInput(TCodingErrorAction.REPLACE)
+                .onUnmappableCharacter(TCodingErrorAction.REPLACE));
     }
 
     public TInputStreamReader(TInputStream in) {
         this(in, new TUTF8Charset());
-        charsetName = TString.wrap("UTF-8");
     }
 
-    public TInputStreamReader(TInputStream in, TCharset charset) {
+    public TInputStreamReader(TInputStream in, TCharsetDecoder decoder) {
         this.stream = in;
-        this.charset = charset;
+        this.decoder = decoder;
         outBuffer.position(outBuffer.limit());
         inBuffer.position(inBuffer.limit());
     }
 
+    private static TCharset getCharset(TString charsetName) throws TUnsupportedEncodingException  {
+        try {
+            return TCharset.forName(charsetName.toString());
+        } catch (TUnsupportedCharsetException e) {
+            throw new TUnsupportedEncodingException(charsetName);
+        }
+    }
+
     public TString getEncoding() {
-        return charsetName;
+        return TString.wrap(decoder.charset().name());
     }
 
     @Override
@@ -98,17 +110,16 @@ public class TInputStreamReader extends TReader {
             return false;
         }
         outBuffer.compact();
-        TCharsetDecoder decoder = charset.newDecoder()
-                .onMalformedInput(TCodingErrorAction.REPLACE)
-                .onUnmappableCharacter(TCodingErrorAction.IGNORE);
         while (true) {
             if (!inBuffer.hasRemaining() && !fillReadBuffer()) {
+                break;
+            }
+            if (decoder.decode(inBuffer, outBuffer, streamEof).isOverflow()) {
+                break;
+            }
+        }
+        if (!inBuffer.hasRemaining() && streamEof && decoder.flush(outBuffer).isUnderflow()) {
             eof = true;
-                break;
-            }
-            if (decoder.decode(inBuffer, outBuffer, eof).isOverflow()) {
-                break;
-            }
         }
         outBuffer.flip();
         return true;

teavm-classlib/src/main/java/org/teavm/classlib/java/io/TOutputStreamWriter.java

@@ -15,40 +15,61 @@
  */
 package org.teavm.classlib.java.io;
 
-import org.teavm.classlib.impl.charset.ByteBuffer;
-import org.teavm.classlib.impl.charset.CharBuffer;
-import org.teavm.classlib.impl.charset.Charset;
 import org.teavm.classlib.java.lang.TString;
+import org.teavm.classlib.java.nio.TByteBuffer;
+import org.teavm.classlib.java.nio.TCharBuffer;
+import org.teavm.classlib.java.nio.charset.*;
+import org.teavm.classlib.java.nio.charset.impl.TUTF8Charset;
 
 public class TOutputStreamWriter extends TWriter {
     private TOutputStream out;
-    private String encoding;
+    private TCharsetEncoder encoder;
-    private Charset charset;
     private byte[] bufferData = new byte[512];
-    private ByteBuffer buffer = new ByteBuffer(bufferData);
+    private TByteBuffer buffer = TByteBuffer.wrap(bufferData);
+    private boolean closed;
 
     public TOutputStreamWriter(TOutputStream out) {
-        this(out, "UTF-8");
+        this(nullCheck(out), new TUTF8Charset());
     }
 
     public TOutputStreamWriter(TOutputStream out, final String enc) throws TUnsupportedEncodingException {
-        super(out);
+        this(nullCheck(out), getCharset(enc));
-        if (enc == null) {
+    }
+
+    public TOutputStreamWriter(TOutputStream out, TCharset charset) {
+        this(nullCheck(out), charset.newEncoder()
+                .onMalformedInput(TCodingErrorAction.REPLACE)
+                .onUnmappableCharacter(TCodingErrorAction.REPLACE));
+    }
+
+    public TOutputStreamWriter(TOutputStream out, TCharsetEncoder encoder) {
+        this.out = nullCheck(out);
+        this.encoder = encoder;
+    }
+
+    private static TOutputStream nullCheck(TOutputStream stream) {
+        if (stream == null) {
             throw new NullPointerException();
         }
-        this.out = out;
+        return stream;
-        charset = Charset.get(enc);
+    }
-        if (charset == null) {
+
-            throw new TUnsupportedEncodingException(TString.wrap(enc));
+    private static TCharset getCharset(String charsetName) throws TUnsupportedEncodingException  {
+        if (charsetName == null) {
+            throw new NullPointerException();
+        }
+        try {
+            return TCharset.forName(charsetName);
+        } catch (TUnsupportedCharsetException | TIllegalCharsetNameException e) {
+            throw new TUnsupportedEncodingException(TString.wrap(charsetName));
         }
-        encoding = enc;
     }
 
     @Override
     public void close() throws TIOException {
-        if (charset != null) {
+        if (!closed) {
             flush();
-            charset = null;
+            closed = true;
             out.flush();
             out.close();
         }
@@ -59,19 +80,19 @@ public class TOutputStreamWriter extends TWriter {
         checkStatus();
         if (buffer.position() > 0) {
             out.write(bufferData, 0, buffer.position());
-            buffer.rewind(0);
+            buffer.clear();
         }
         out.flush();
     }
 
     private void checkStatus() throws TIOException {
-        if (charset == null) {
+        if (closed) {
             throw new TIOException(TString.wrap("Writer already closed"));
         }
     }
 
     public String getEncoding() {
-        return encoding;
+        return encoder.charset().name();
     }
 
     @Override
@@ -84,30 +105,20 @@ public class TOutputStreamWriter extends TWriter {
             if (offset < 0 || offset > buf.length - count || count < 0) {
                 throw new IndexOutOfBoundsException();
             }
-            CharBuffer input = new CharBuffer(buf, offset, offset + count);
+            TCharBuffer input = TCharBuffer.wrap(buf, offset, count);
-            while (!input.end()) {
+            while (input.hasRemaining()) {
-                if (buffer.available() < 6) {
+                if (encoder.encode(input, buffer, false).isOverflow()) {
                     out.write(bufferData, 0, buffer.position());
-                    buffer.rewind(0);
+                    buffer.clear();
                 }
-                charset.encode(input, buffer);
             }
         }
     }
 
     @Override
     public void write(int oneChar) throws TIOException {
-        synchronized (lock) {
+        char[] array = { (char)oneChar };
-            checkStatus();
+        write(array, 0, array.length);
-            CharBuffer input = new CharBuffer(new char[] { (char)oneChar }, 0, 1);
-            while (!input.end()) {
-                if (buffer.available() < 6) {
-                    out.write(bufferData, 0, buffer.position());
-                    buffer.rewind(0);
-                }
-                charset.encode(input, buffer);
-            }
-        }
     }
 
     @Override

teavm-classlib/src/main/java/org/teavm/classlib/java/io/TPrintStream.java

@@ -15,13 +15,14 @@
  */
 package org.teavm.classlib.java.io;
 
-import org.teavm.classlib.impl.charset.ByteBuffer;
-import org.teavm.classlib.impl.charset.CharBuffer;
-import org.teavm.classlib.impl.charset.Charset;
 import org.teavm.classlib.java.lang.TMath;
 import org.teavm.classlib.java.lang.TObject;
 import org.teavm.classlib.java.lang.TString;
 import org.teavm.classlib.java.lang.TStringBuilder;
+import org.teavm.classlib.java.nio.TByteBuffer;
+import org.teavm.classlib.java.nio.TCharBuffer;
+import org.teavm.classlib.java.nio.charset.*;
+import org.teavm.classlib.java.nio.charset.impl.TUTF8Charset;
 
 /**
  *
@@ -32,21 +33,22 @@ public class TPrintStream extends TFilterOutputStream {
     private boolean errorState;
     private TStringBuilder sb = new TStringBuilder();
     private char[] buffer = new char[32];
-    private Charset charset;
+    private TCharset charset;
 
     public TPrintStream(TOutputStream out, boolean autoFlush, TString encoding) throws TUnsupportedEncodingException {
         super(out);
         this.autoFlush = autoFlush;
-        charset = Charset.get(encoding.toString());
+        try {
-        if (charset == null) {
+            charset = TCharset.forName(encoding.toString());
-            throw new TUnsupportedEncodingException(TString.wrap("Unsupported encoding: ").concat(encoding));
+        } catch (TUnsupportedCharsetException | TIllegalCharsetNameException e) {
+            throw new TUnsupportedEncodingException(encoding);
         }
     }
 
     public TPrintStream(TOutputStream out, boolean autoFlush) {
         super(out);
         this.autoFlush = autoFlush;
-        this.charset = Charset.get("UTF-8");
+        this.charset = new TUTF8Charset();
     }
 
     public TPrintStream(TOutputStream out) {
@@ -131,13 +133,27 @@ public class TPrintStream extends TFilterOutputStream {
     }
 
     private void print(char[] s, int begin, int end) {
-        CharBuffer src = new CharBuffer(s, begin, end);
+        TCharBuffer src = TCharBuffer.wrap(s, begin, end - begin);
         byte[] destBytes = new byte[TMath.max(16, TMath.min(s.length, 1024))];
-        ByteBuffer dest = new ByteBuffer(destBytes);
+        TByteBuffer dest = TByteBuffer.wrap(destBytes);
-        while (!src.end()) {
+        TCharsetEncoder encoder = charset.newEncoder()
-            charset.encode(src, dest);
+                .onMalformedInput(TCodingErrorAction.REPLACE)
+                .onUnmappableCharacter(TCodingErrorAction.REPLACE);
+        while (true) {
+            boolean overflow = encoder.encode(src, dest, true).isOverflow();
             write(destBytes, 0, dest.position());
-            dest.rewind(0);
+            dest.clear();
+            if (!overflow) {
+                break;
+            }
+        }
+        while (true) {
+            boolean overflow = encoder.flush(dest).isOverflow();
+            write(destBytes, 0, dest.position());
+            dest.clear();
+            if (!overflow) {
+                break;
+            }
         }
     }
 

teavm-classlib/src/main/java/org/teavm/classlib/java/nio/charset/TCharsetDecoder.java

@@ -191,7 +191,7 @@ public abstract class TCharsetDecoder {
             reset();
         }
 
-        TCharBuffer out = TCharBuffer.allocate((int)(averageCharsPerByte * in.remaining()));
+        TCharBuffer out = TCharBuffer.allocate(Math.max(8, (int)(in.remaining() * averageCharsPerByte)));
         TCoderResult result;
         while (true) {
             result = decode(in, out, false);
@@ -237,7 +237,7 @@ public abstract class TCharsetDecoder {
 
     private TCharBuffer expand(TCharBuffer buffer) {
         char[] array = buffer.array();
-        array = Arrays.copyOf(array, array.length * 2);
+        array = Arrays.copyOf(array, Math.max(8, array.length * 2));
         TCharBuffer result = TCharBuffer.wrap(array);
         result.position(buffer.position());
         return result;

teavm-tests/src/test/java/org/teavm/classlib/java/nio/charset/UTF8Test.java

@@ -64,6 +64,17 @@ public class UTF8Test {
         assertArrayEquals(new byte[] { 97, -16, -112, -128, -128, 98 }, result);
     }
 
+    @Test
+    public void encodeSupplementary() {
+        Charset charset = Charset.forName("UTF-8");
+        StringBuilder sb = new StringBuilder();
+        sb.appendCodePoint(0xfedcb);
+        ByteBuffer buffer = charset.encode(sb.toString());
+        byte[] result = new byte[buffer.remaining()];
+        buffer.get(result);
+        assertArrayEquals(new byte[] { -13, -66, -73, -117 }, result);
+    }
+
     @Test
     public void replaceMalformedFirstByte() {
         Charset charset = Charset.forName("UTF-8");