ebce970d7f
2005-04-20 Sven de Marothy <sven@physto.se> * java/nio/ByteBufferImpl.java: (putChar): Inlined for speed. (put, get): Bulk methods can use arraycopy. * java/nio/CharBufferImpl.java: (put, get): Bulk methods can use arraycopy. 2005-04-20 Jeroen Frijters <jeroen@frijters.net> * java/nio/ByteBufferImpl.java (get(), put(byte)): Inlined checks and field updates. * java/nio/CharBufferImpl.java (CharBufferImpl(CharBufferImpl)): Copy array_offset field. (get(), put(char)): Inlined checks and field updates. Fixed to take array_offset into account. (get(int), put(int, char)): Fixed to take array_offset into account. From-SVN: r98445
220 lines
6.0 KiB
Java
220 lines
6.0 KiB
Java
/* CharBufferImpl.java --
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Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.nio;
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/**
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* This is a Heap memory implementation
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*/
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final class CharBufferImpl extends CharBuffer
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{
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private boolean readOnly;
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CharBufferImpl (int capacity)
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{
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this (new char [capacity], 0, capacity, capacity, 0, -1, false);
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}
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CharBufferImpl (char[] buffer, int offset, int capacity, int limit, int position, int mark, boolean readOnly)
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{
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super (capacity, limit, position, mark);
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this.backing_buffer = buffer;
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this.array_offset = offset;
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this.readOnly = readOnly;
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}
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public CharBufferImpl (CharBufferImpl copy)
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{
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super (copy.capacity (), copy.limit (), copy.position (), 0);
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backing_buffer = copy.backing_buffer;
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array_offset = copy.array_offset;
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readOnly = copy.isReadOnly ();
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}
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public boolean isReadOnly ()
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{
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return readOnly;
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}
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public CharBuffer slice ()
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{
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return new CharBufferImpl (backing_buffer, array_offset + position (), remaining (), remaining (), 0, -1, isReadOnly ());
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}
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public CharBuffer duplicate ()
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{
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return new CharBufferImpl (backing_buffer, array_offset, capacity (), limit (), position (), mark, isReadOnly ());
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}
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public CharBuffer asReadOnlyBuffer ()
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{
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return new CharBufferImpl (backing_buffer, array_offset, capacity (), limit (), position (), mark, true);
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}
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public CharBuffer compact ()
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{
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checkIfReadOnly();
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mark = -1;
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int copied = 0;
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while (remaining () > 0)
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{
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put (copied, get ());
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copied++;
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}
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position (copied);
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limit(capacity());
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return this;
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}
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public boolean isDirect ()
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{
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return false;
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}
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public CharSequence subSequence (int start, int end)
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{
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if (start < 0
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|| start > length ()
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|| end < start
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|| end > length ())
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throw new IndexOutOfBoundsException ();
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return new CharBufferImpl (backing_buffer, array_offset, capacity (), position () + end, position () + start, -1, isReadOnly ());
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}
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/**
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* Reads the <code>char</code> at this buffer's current position,
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* and then increments the position.
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*
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* @exception BufferUnderflowException If there are no remaining
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* <code>char</code>s in this buffer.
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*/
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public char get ()
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{
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if (pos >= limit)
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throw new BufferUnderflowException();
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return backing_buffer [(pos++) + array_offset];
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}
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/**
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* Relative put method. Writes <code>value</code> to the next position
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* in the buffer.
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*
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* @exception ReadOnlyBufferException If this buffer is read-only.
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*/
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public CharBuffer put (char value)
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{
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if (readOnly)
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throw new ReadOnlyBufferException();
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if (pos >= limit)
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throw new BufferOverflowException();
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backing_buffer [(pos++) + array_offset] = value;
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return this;
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}
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/**
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* Absolute get method. Reads the <code>char</code> at position
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* <code>index</code>.
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*
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* @param index Position to read the <code>char</code> from.
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*
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* @exception IndexOutOfBoundsException If index is negative or not smaller
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* than the buffer's limit.
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*/
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public char get (int index)
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{
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checkIndex(index);
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return backing_buffer [index + array_offset];
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}
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/**
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* Bulk get, overloaded for speed.
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*/
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public CharBuffer get (char[] dst, int offset, int length)
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{
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checkArraySize(dst.length, offset, length);
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checkForUnderflow(length);
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System.arraycopy(backing_buffer, pos + array_offset,
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dst, offset, length);
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pos += length;
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return this;
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}
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/**
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* Bulk put, overloaded for speed.
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*/
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public CharBuffer put (char[] src, int offset, int length)
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{
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checkArraySize(src.length, offset, length);
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checkForOverflow(length);
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System.arraycopy(src, offset,
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backing_buffer, pos + array_offset, length);
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pos += length;
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return this;
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}
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/**
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* Absolute put method. Writes <code>value</code> to position
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* <code>index</code> in the buffer.
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*
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* @exception IndexOutOfBoundsException If index is negative or not smaller
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* than the buffer's limit.
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* @exception ReadOnlyBufferException If this buffer is read-only.
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*/
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public CharBuffer put (int index, char value)
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{
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checkIndex(index);
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checkIfReadOnly();
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backing_buffer [index + array_offset] = value;
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return this;
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}
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public ByteOrder order ()
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{
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return ByteOrder.nativeOrder ();
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}
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}
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