From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libjava/classpath/java/io/OutputStreamWriter.java | 429 ++++++++++++++++++++++ 1 file changed, 429 insertions(+) create mode 100644 libjava/classpath/java/io/OutputStreamWriter.java (limited to 'libjava/classpath/java/io/OutputStreamWriter.java') diff --git a/libjava/classpath/java/io/OutputStreamWriter.java b/libjava/classpath/java/io/OutputStreamWriter.java new file mode 100644 index 000000000..27067fdb9 --- /dev/null +++ b/libjava/classpath/java/io/OutputStreamWriter.java @@ -0,0 +1,429 @@ +/* OutputStreamWriter.java -- Writer that converts chars to bytes + Copyright (C) 1998, 1999, 2000, 2001, 2003, 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 java.io; + +import gnu.java.nio.charset.EncodingHelper; + +import java.nio.ByteBuffer; +import java.nio.CharBuffer; +import java.nio.charset.CharacterCodingException; +import java.nio.charset.Charset; +import java.nio.charset.CharsetEncoder; +import java.nio.charset.CodingErrorAction; +import java.nio.charset.MalformedInputException; + +/** + * This class writes characters to an output stream that is byte oriented + * It converts the chars that are written to bytes using an encoding layer, + * which is specific to a particular encoding standard. The desired + * encoding can either be specified by name, or if no encoding is specified, + * the system default encoding will be used. The system default encoding + * name is determined from the system property file.encoding. + * The only encodings that are guaranteed to be available are "8859_1" + * (the Latin-1 character set) and "UTF8". Unfortunately, Java does not + * provide a mechanism for listing the encodings that are supported in + * a given implementation. + *

+ * Here is a list of standard encoding names that may be available: + *

+ *

+ * + * @author Aaron M. Renn (arenn@urbanophile.com) + * @author Per Bothner (bothner@cygnus.com) + * @date April 17, 1998. + */ +public class OutputStreamWriter extends Writer +{ + /** + * The output stream. + */ + private OutputStream out; + + /** + * The charset encoder. + */ + private final CharsetEncoder encoder; + + /** + * java.io canonical name of the encoding. + */ + private final String encodingName; + + /** + * Buffer output before character conversion as it has costly overhead. + */ + private final CharBuffer outputBuffer; + private final static int BUFFER_SIZE = 1024; + + /** + * This method initializes a new instance of OutputStreamWriter + * to write to the specified stream using a caller supplied character + * encoding scheme. Note that due to a deficiency in the Java language + * design, there is no way to determine which encodings are supported. + * + * @param out The OutputStream to write to + * @param encoding_scheme The name of the encoding scheme to use for + * character to byte translation + * + * @exception UnsupportedEncodingException If the named encoding is + * not available. + */ + public OutputStreamWriter (OutputStream out, String encoding_scheme) + throws UnsupportedEncodingException + { + CharsetEncoder encoder; + String encodingName; + this.out = out; + outputBuffer = CharBuffer.allocate(BUFFER_SIZE); + + try + { + // Don't use NIO if avoidable + if(EncodingHelper.isISOLatin1(encoding_scheme)) + { + encodingName = "ISO8859_1"; + encoder = null; + } + else + { + /* + * Workaround for encodings with a byte-order-mark. + * We only want to write it once per stream. + */ + try + { + if(encoding_scheme.equalsIgnoreCase("UnicodeBig") || + encoding_scheme.equalsIgnoreCase("UTF-16") || + encoding_scheme.equalsIgnoreCase("UTF16")) + { + encoding_scheme = "UTF-16BE"; + out.write((byte)0xFE); + out.write((byte)0xFF); + } + else if(encoding_scheme.equalsIgnoreCase("UnicodeLittle")) + { + encoding_scheme = "UTF-16LE"; + out.write((byte)0xFF); + out.write((byte)0xFE); + } + } + catch(IOException ioe) + { + } + + Charset cs = EncodingHelper.getCharset(encoding_scheme); + if(cs == null) + throw new UnsupportedEncodingException("Encoding "+encoding_scheme+ + " unknown"); + encoder = cs.newEncoder(); + encodingName = EncodingHelper.getOldCanonical(cs.name()); + + encoder.onMalformedInput(CodingErrorAction.REPLACE); + encoder.onUnmappableCharacter(CodingErrorAction.REPLACE); + } + } + catch(RuntimeException e) + { + // Default to ISO Latin-1, will happen if this is called, for instance, + // before the NIO provider is loadable. + encoder = null; + encodingName = "ISO8859_1"; + } + this.encoder = encoder; + this.encodingName = encodingName; + } + + /** + * This method initializes a new instance of OutputStreamWriter + * to write to the specified stream using the default encoding. + * + * @param out The OutputStream to write to + */ + public OutputStreamWriter (OutputStream out) + { + CharsetEncoder encoder; + String encodingName; + this.out = out; + outputBuffer = CharBuffer.allocate(BUFFER_SIZE); + try + { + String encoding = System.getProperty("file.encoding"); + Charset cs = Charset.forName(encoding); + encoder = cs.newEncoder(); + encodingName = EncodingHelper.getOldCanonical(cs.name()); + } + catch(RuntimeException e) + { + encoder = null; + encodingName = "ISO8859_1"; + } + + if(encoder != null) + { + encoder.onMalformedInput(CodingErrorAction.REPLACE); + encoder.onUnmappableCharacter(CodingErrorAction.REPLACE); + } + this.encoder = encoder; + this.encodingName = encodingName; + } + + /** + * This method initializes a new instance of OutputStreamWriter + * to write to the specified stream using a given Charset. + * + * @param out The OutputStream to write to + * @param cs The Charset of the encoding to use + * + * @since 1.5 + */ + public OutputStreamWriter(OutputStream out, Charset cs) + { + this.out = out; + encoder = cs.newEncoder(); + encoder.onMalformedInput(CodingErrorAction.REPLACE); + encoder.onUnmappableCharacter(CodingErrorAction.REPLACE); + outputBuffer = CharBuffer.allocate(BUFFER_SIZE); + encodingName = EncodingHelper.getOldCanonical(cs.name()); + } + + /** + * This method initializes a new instance of OutputStreamWriter + * to write to the specified stream using a given + * CharsetEncoder. + * + * @param out The OutputStream to write to + * @param enc The CharsetEncoder to encode the output with + * + * @since 1.5 + */ + public OutputStreamWriter(OutputStream out, CharsetEncoder enc) + { + this.out = out; + encoder = enc; + outputBuffer = CharBuffer.allocate(BUFFER_SIZE); + Charset cs = enc.charset(); + if (cs == null) + encodingName = "US-ASCII"; + else + encodingName = EncodingHelper.getOldCanonical(cs.name()); + } + + /** + * This method closes this stream, and the underlying + * OutputStream + * + * @exception IOException If an error occurs + */ + public void close () throws IOException + { + if(out == null) + return; + flush(); + out.close (); + out = null; + } + + /** + * This method returns the name of the character encoding scheme currently + * in use by this stream. If the stream has been closed, then this method + * may return null. + * + * @return The encoding scheme name + */ + public String getEncoding () + { + return out != null ? encodingName : null; + } + + /** + * This method flushes any buffered bytes to the underlying output sink. + * + * @exception IOException If an error occurs + */ + public void flush () throws IOException + { + if(out != null){ + if(outputBuffer != null){ + char[] buf = new char[outputBuffer.position()]; + if(buf.length > 0){ + outputBuffer.flip(); + outputBuffer.get(buf); + writeConvert(buf, 0, buf.length); + outputBuffer.clear(); + } + } + out.flush (); + } + } + + /** + * This method writes count characters from the specified + * array to the output stream starting at position offset + * into the array. + * + * @param buf The array of character to write from + * @param offset The offset into the array to start writing chars from + * @param count The number of chars to write. + * + * @exception IOException If an error occurs + */ + public void write (char[] buf, int offset, int count) throws IOException + { + if(out == null) + throw new IOException("Stream is closed."); + if(buf == null) + throw new IOException("Buffer is null."); + + if(outputBuffer != null) + { + if(count >= outputBuffer.remaining()) + { + int r = outputBuffer.remaining(); + outputBuffer.put(buf, offset, r); + writeConvert(outputBuffer.array(), 0, BUFFER_SIZE); + outputBuffer.clear(); + offset += r; + count -= r; + // if the remaining bytes is larger than the whole buffer, + // just don't buffer. + if(count >= outputBuffer.remaining()){ + writeConvert(buf, offset, count); + return; + } + } + outputBuffer.put(buf, offset, count); + } else writeConvert(buf, offset, count); + } + + /** + * Converts and writes characters. + */ + private void writeConvert (char[] buf, int offset, int count) + throws IOException + { + if(encoder == null) + { + byte[] b = new byte[count]; + for(int i=0;icount bytes from the specified + * String starting at position offset into the + * String. + * + * @param str The String to write chars from + * @param offset The position in the String to start + * writing chars from + * @param count The number of chars to write + * + * @exception IOException If an error occurs + */ + public void write (String str, int offset, int count) throws IOException + { + if(str == null) + throw new IOException("String is null."); + + write(str.toCharArray(), offset, count); + } + + /** + * This method writes a single character to the output stream. + * + * @param ch The char to write, passed as an int. + * + * @exception IOException If an error occurs + */ + public void write (int ch) throws IOException + { + // No buffering, no encoding ... just pass through + if (encoder == null && outputBuffer == null) { + out.write(nullConversion((char)ch)); + } else { + if (outputBuffer != null) { + if (outputBuffer.remaining() == 0) { + writeConvert(outputBuffer.array(), 0, BUFFER_SIZE); + outputBuffer.clear(); + } + outputBuffer.put((char)ch); + } else { + writeConvert(new char[]{ (char)ch }, 0, 1); + } + } + } +} // class OutputStreamWriter -- cgit v1.2.3