166 lines
3.7 KiB
Java
166 lines
3.7 KiB
Java
// DataOutputStream.java - Output filter that implements DataOutput
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/* Copyright (C) 1998, 1999 Cygnus Solutions
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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package java.io;
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/**
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* @author Tom Tromey <tromey@cygnus.com>
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* @date September 24, 1998
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*/
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/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
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* "The Java Language Specification", ISBN 0-201-63451-1
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* Status: Complete to version 1.1.
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*/
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public class DataOutputStream extends FilterOutputStream implements DataOutput
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{
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public DataOutputStream (OutputStream out)
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{
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super (out);
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written = 0;
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}
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public void flush () throws IOException
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{
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out.flush();
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}
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public final int size ()
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{
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return written;
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}
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public synchronized void write (int b) throws IOException
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{
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out.write(b);
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++written;
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}
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public synchronized void write (byte[] b, int off, int len)
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throws IOException, NullPointerException, IndexOutOfBoundsException
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{
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out.write(b, off, len);
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written += len - off;
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}
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public final void writeBoolean (boolean v) throws IOException
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{
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write (v ? 1 : 0);
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}
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public final void writeByte (int v) throws IOException
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{
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write (v & 0xff);
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}
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public final void writeShort (int v) throws IOException
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{
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write ((byte) (0xff & (v >> 8)));
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write ((byte) (0xff & v));
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}
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public final void writeChar (int v) throws IOException
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{
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write ((byte) (0xff & (v >> 8)));
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write ((byte) (0xff & v));
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}
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public final void writeInt (int v) throws IOException
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{
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write ((byte) (0xff & (v >> 24)));
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write ((byte) (0xff & (v >> 16)));
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write ((byte) (0xff & (v >> 8)));
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write ((byte) (0xff & v));
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}
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public final void writeLong (long v) throws IOException
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{
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write ((byte) (0xff & (v >> 56)));
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write ((byte) (0xff & (v >> 48)));
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write ((byte) (0xff & (v >> 40)));
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write ((byte) (0xff & (v >> 32)));
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write ((byte) (0xff & (v >> 24)));
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write ((byte) (0xff & (v >> 16)));
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write ((byte) (0xff & (v >> 8)));
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write ((byte) (0xff & v));
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}
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public final void writeFloat (float v) throws IOException
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{
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writeInt (Float.floatToIntBits(v));
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}
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public final void writeDouble (double v) throws IOException
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{
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writeLong (Double.doubleToLongBits(v));
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}
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public final void writeBytes (String s) throws IOException
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{
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int len = s.length();
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for (int i = 0; i < len; ++i)
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writeByte (s.charAt(i));
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}
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public final void writeChars (String s) throws IOException
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{
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int len = s.length();
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for (int i = 0; i < len; ++i)
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writeChar (s.charAt(i));
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}
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public final void writeUTF (String s) throws IOException
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{
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int len = s.length();
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int sum = 0;
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for (int i = 0; i < len && sum <= 65535; ++i)
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{
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char c = s.charAt(i);
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if (c >= '\u0001' && c <= '\u007f')
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sum += 1;
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else if (c == '\u0000' || (c >= '\u0080' && c <= '\u07ff'))
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sum += 2;
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else
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sum += 3;
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}
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if (sum > 65535)
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throw new UTFDataFormatException ();
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writeShort (sum);
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for (int i = 0; i < len; ++i)
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{
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char c = s.charAt(i);
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if (c >= '\u0001' && c <= '\u007f')
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write (c);
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else if (c == '\u0000' || (c >= '\u0080' && c <= '\u07ff'))
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{
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write (0xc0 | (0x1f & (c >> 6)));
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write (0x80 | (0x3f & c));
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}
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else
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{
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// JSL says the first byte should be or'd with 0xc0, but
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// that is a typo. Unicode says 0xe0, and that is what is
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// consistent with DataInputStream.
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write (0xe0 | (0x0f & (c >> 12)));
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write (0x80 | (0x3f & (c >> 6)));
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write (0x80 | (0x3f & c));
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}
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}
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}
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// Number of bytes written so far.
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protected int written;
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}
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