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/nio/ByteBufferImpl.java | 374 +++++++++++++++++++++++++ 1 file changed, 374 insertions(+) create mode 100644 libjava/classpath/java/nio/ByteBufferImpl.java (limited to 'libjava/classpath/java/nio/ByteBufferImpl.java') diff --git a/libjava/classpath/java/nio/ByteBufferImpl.java b/libjava/classpath/java/nio/ByteBufferImpl.java new file mode 100644 index 000000000..2bf319220 --- /dev/null +++ b/libjava/classpath/java/nio/ByteBufferImpl.java @@ -0,0 +1,374 @@ +/* ByteBufferImpl.java -- + Copyright (C) 2002, 2003, 2004, 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.nio; + +/** + * This is a Heap memory implementation + */ +final class ByteBufferImpl extends ByteBuffer +{ + private final boolean readOnly; + + ByteBufferImpl (byte[] buffer, int offset, int capacity, int limit, + int position, int mark, boolean readOnly) + { + super (capacity, limit, position, mark, null, buffer, offset); + this.readOnly = readOnly; + } + + public CharBuffer asCharBuffer () + { + return new CharViewBufferImpl (this, remaining() >> 1); + } + + public ShortBuffer asShortBuffer () + { + return new ShortViewBufferImpl (this, remaining() >> 1); + } + + public IntBuffer asIntBuffer () + { + return new IntViewBufferImpl (this, remaining() >> 2); + } + + public LongBuffer asLongBuffer () + { + return new LongViewBufferImpl (this, remaining() >> 3); + } + + public FloatBuffer asFloatBuffer () + { + return new FloatViewBufferImpl (this, remaining() >> 2); + } + + public DoubleBuffer asDoubleBuffer () + { + return new DoubleViewBufferImpl (this, remaining() >> 3); + } + + public boolean isReadOnly () + { + return readOnly; + } + + public ByteBuffer slice () + { + return new ByteBufferImpl (backing_buffer, array_offset + position (), + remaining (), remaining (), 0, -1, isReadOnly ()); + } + + public ByteBuffer duplicate () + { + return new ByteBufferImpl (backing_buffer, array_offset, capacity (), + limit (), position (), mark, isReadOnly ()); + } + + public ByteBuffer asReadOnlyBuffer () + { + return new ByteBufferImpl (backing_buffer, array_offset, capacity (), + limit (), position (), mark, true); + } + + void shiftDown (int dst_offset, int src_offset, int count) + { + System.arraycopy(backing_buffer, array_offset + src_offset, + backing_buffer, array_offset + dst_offset, + count); + } + + public ByteBuffer compact () + { + checkIfReadOnly(); + mark = -1; + int pos = position(); + int n = limit() - pos; + if (n > 0) + shiftDown(0, pos, n); + position(n); + limit(capacity()); + return this; + } + + public boolean isDirect () + { + return false; + } + + /** + * Reads the byte at this buffer's current position, + * and then increments the position. + * + * @exception BufferUnderflowException If there are no remaining + * bytes in this buffer. + */ + public byte get () + { + if (pos >= limit) + throw new BufferUnderflowException(); + + return backing_buffer [(pos++) + array_offset]; + } + + /** + * Bulk get + */ + public ByteBuffer get (byte[] dst, int offset, int length) + { + checkArraySize(dst.length, offset, length); + if ( (limit - pos) < length) // check for overflow + throw new BufferUnderflowException(); + + System.arraycopy(backing_buffer, pos + array_offset, + dst, offset, length); + pos += length; + + return this; + } + + /** + * Relative bulk put(), overloads the ByteBuffer impl. + */ + public ByteBuffer put (byte[] src, int offset, int length) + { + if ( (limit - pos) < length) // check for overflow + throw new BufferOverflowException(); + checkArraySize(src.length, offset, length); + + System.arraycopy(src, offset, backing_buffer, pos + array_offset, length); + pos += length; + + return this; + } + + /** + * Relative put method. Writes value to the next position + * in the buffer. + * + * @exception BufferOverflowException If there is no remaining + * space in this buffer. + * @exception ReadOnlyBufferException If this buffer is read-only. + */ + public ByteBuffer put (byte value) + { + if (readOnly) + throw new ReadOnlyBufferException(); + if (pos >= limit) + throw new BufferOverflowException(); + + backing_buffer [(pos++) + array_offset] = value; + return this; + } + + /** + * Absolute get method. Reads the byte at position + * index. + * + * @exception IndexOutOfBoundsException If index is negative or not smaller + * than the buffer's limit. + */ + public byte get (int index) + { + checkIndex(index); + + return backing_buffer [index + array_offset]; + } + + /** + * Absolute put method. Writes value to position + * index in the buffer. + * + * @exception IndexOutOfBoundsException If index is negative or not smaller + * than the buffer's limit. + * @exception ReadOnlyBufferException If this buffer is read-only. + */ + public ByteBuffer put (int index, byte value) + { + checkIfReadOnly(); + checkIndex(index); + + backing_buffer [index + array_offset] = value; + return this; + } + + public char getChar () + { + return ByteBufferHelper.getChar(this, order()); + } + + public ByteBuffer putChar (char value) + { + if (readOnly) + throw new ReadOnlyBufferException (); + if ( (limit-pos) < 2) + throw new BufferOverflowException(); + + if (endian == ByteOrder.LITTLE_ENDIAN) + { + backing_buffer [(pos++) + array_offset] = (byte)(value&0xFF); + backing_buffer [(pos++) + array_offset] = (byte)(value>>8); + } + else + { + backing_buffer [(pos++) + array_offset] = (byte)(value>>8); + backing_buffer [(pos++) + array_offset] = (byte)(value&0xFF); + } + return this; + } + + public char getChar (int index) + { + return ByteBufferHelper.getChar(this, index, order()); + } + + public ByteBuffer putChar (int index, char value) + { + ByteBufferHelper.putChar(this, index, value, order()); + return this; + } + + public short getShort () + { + return ByteBufferHelper.getShort(this, order()); + } + + public ByteBuffer putShort (short value) + { + ByteBufferHelper.putShort(this, value, order()); + return this; + } + + public short getShort (int index) + { + return ByteBufferHelper.getShort(this, index, order()); + } + + public ByteBuffer putShort (int index, short value) + { + ByteBufferHelper.putShort(this, index, value, order()); + return this; + } + + public int getInt () + { + return ByteBufferHelper.getInt(this, order()); + } + + public ByteBuffer putInt (int value) + { + ByteBufferHelper.putInt(this, value, order()); + return this; + } + + public int getInt (int index) + { + return ByteBufferHelper.getInt(this, index, order()); + } + + public ByteBuffer putInt (int index, int value) + { + ByteBufferHelper.putInt(this, index, value, order()); + return this; + } + + public long getLong () + { + return ByteBufferHelper.getLong(this, order()); + } + + public ByteBuffer putLong (long value) + { + ByteBufferHelper.putLong (this, value, order()); + return this; + } + + public long getLong (int index) + { + return ByteBufferHelper.getLong (this, index, order()); + } + + public ByteBuffer putLong (int index, long value) + { + ByteBufferHelper.putLong (this, index, value, order()); + return this; + } + + public float getFloat () + { + return ByteBufferHelper.getFloat (this, order()); + } + + public ByteBuffer putFloat (float value) + { + ByteBufferHelper.putFloat (this, value, order()); + return this; + } + + public float getFloat (int index) + { + return ByteBufferHelper.getFloat (this, index, order()); + } + + public ByteBuffer putFloat (int index, float value) + { + ByteBufferHelper.putFloat (this, index, value, order()); + return this; + } + + public double getDouble () + { + return ByteBufferHelper.getDouble (this, order()); + } + + public ByteBuffer putDouble (double value) + { + ByteBufferHelper.putDouble (this, value, order()); + return this; + } + + public double getDouble (int index) + { + return ByteBufferHelper.getDouble (this, index, order()); + } + + public ByteBuffer putDouble (int index, double value) + { + ByteBufferHelper.putDouble (this, index, value, order()); + return this; + } +} -- cgit v1.2.3