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// ========================================================================
// Copyright 2004-2005 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// 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.mortbay.io;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.Arrays;
/* ------------------------------------------------------------------------------- */
/**
* @author gregw
*/
public class ByteArrayBuffer extends AbstractBuffer
{
protected byte[] _bytes;
protected ByteArrayBuffer(int access, boolean isVolatile)
{
super(access, isVolatile);
}
public ByteArrayBuffer(byte[] bytes)
{
this(bytes, 0, bytes.length, READWRITE);
}
public ByteArrayBuffer(byte[] bytes, int index, int length)
{
this(bytes, index, length, READWRITE);
}
public ByteArrayBuffer(byte[] bytes, int index, int length, int access)
{
super(READWRITE, NON_VOLATILE);
_bytes = bytes;
setPutIndex(index + length);
setGetIndex(index);
_access = access;
}
public ByteArrayBuffer(byte[] bytes, int index, int length, int access, boolean isVolatile)
{
super(READWRITE, isVolatile);
_bytes = bytes;
setPutIndex(index + length);
setGetIndex(index);
_access = access;
}
public ByteArrayBuffer(int size)
{
this(new byte[size], 0, size, READWRITE);
setPutIndex(0);
}
public ByteArrayBuffer(String value)
{
super(READWRITE,NON_VOLATILE);
_bytes = Portable.getBytes(value);
setGetIndex(0);
setPutIndex(_bytes.length);
_access=IMMUTABLE;
_string = value;
}
public ByteArrayBuffer(String value,String encoding) throws UnsupportedEncodingException
{
super(READWRITE,NON_VOLATILE);
_bytes = value.getBytes(encoding);
setGetIndex(0);
setPutIndex(_bytes.length);
_access=IMMUTABLE;
_string = value;
}
public byte[] array()
{
return _bytes;
}
public int capacity()
{
return _bytes.length;
}
public void compact()
{
if (isReadOnly())
throw new IllegalStateException(__READONLY);
int s = markIndex() >= 0 ? markIndex() : getIndex();
if (s > 0)
{
int length = putIndex() - s;
if (length > 0)
{
Portable.arraycopy(_bytes, s,_bytes, 0, length);
}
if (markIndex() > 0) setMarkIndex(markIndex() - s);
setGetIndex(getIndex() - s);
setPutIndex(putIndex() - s);
}
}
public boolean equals(Object obj)
{
if (obj==this)
return true;
if (obj == null || !(obj instanceof Buffer))
return false;
if (obj instanceof Buffer.CaseInsensitve)
return equalsIgnoreCase((Buffer)obj);
Buffer b = (Buffer) obj;
// reject different lengths
if (b.length() != length())
return false;
// reject AbstractBuffer with different hash value
if (_hash != 0 && obj instanceof AbstractBuffer)
{
AbstractBuffer ab = (AbstractBuffer) obj;
if (ab._hash != 0 && _hash != ab._hash)
return false;
}
// Nothing for it but to do the hard grind.
int get=getIndex();
int bi=b.putIndex();
for (int i = putIndex(); i-->get;)
{
byte b1 = _bytes[i];
byte b2 = b.peek(--bi);
if (b1 != b2) return false;
}
return true;
}
public boolean equalsIgnoreCase(Buffer b)
{
if (b==this)
return true;
// reject different lengths
if (b==null || b.length() != length())
return false;
// reject AbstractBuffer with different hash value
if (_hash != 0 && b instanceof AbstractBuffer)
{
AbstractBuffer ab = (AbstractBuffer) b;
if (ab._hash != 0 && _hash != ab._hash) return false;
}
// Nothing for it but to do the hard grind.
int get=getIndex();
int bi=b.putIndex();
byte[] barray=b.array();
if (barray==null)
{
for (int i = putIndex(); i-->get;)
{
byte b1 = _bytes[i];
byte b2 = b.peek(--bi);
if (b1 != b2)
{
if ('a' <= b1 && b1 <= 'z') b1 = (byte) (b1 - 'a' + 'A');
if ('a' <= b2 && b2 <= 'z') b2 = (byte) (b2 - 'a' + 'A');
if (b1 != b2) return false;
}
}
}
else
{
for (int i = putIndex(); i-->get;)
{
byte b1 = _bytes[i];
byte b2 = barray[--bi];
if (b1 != b2)
{
if ('a' <= b1 && b1 <= 'z') b1 = (byte) (b1 - 'a' + 'A');
if ('a' <= b2 && b2 <= 'z') b2 = (byte) (b2 - 'a' + 'A');
if (b1 != b2) return false;
}
}
}
return true;
}
public byte get()
{
return _bytes[_get++];
}
public int hashCode()
{
if (_hash == 0 || _hashGet!=_get || _hashPut!=_put)
{
int get=getIndex();
for (int i = putIndex(); i-- >get;)
{
byte b = _bytes[i];
if ('a' <= b && b <= 'z')
b = (byte) (b - 'a' + 'A');
_hash = 31 * _hash + b;
}
if (_hash == 0)
_hash = -1;
_hashGet=_get;
_hashPut=_put;
}
return _hash;
}
public byte peek(int index)
{
return _bytes[index];
}
public int peek(int index, byte[] b, int offset, int length)
{
int l = length;
if (index + l > capacity())
{
l = capacity() - index;
if (l==0)
return -1;
}
if (l < 0)
return -1;
Portable.arraycopy(_bytes, index, b, offset, l);
return l;
}
public void poke(int index, byte b)
{
/*
if (isReadOnly())
throw new IllegalStateException(__READONLY);
if (index < 0)
throw new IllegalArgumentException("index<0: " + index + "<0");
if (index > capacity())
throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity());
*/
_bytes[index] = b;
}
public int poke(int index, Buffer src)
{
_hash=0;
/*
if (isReadOnly())
throw new IllegalStateException(__READONLY);
if (index < 0)
throw new IllegalArgumentException("index<0: " + index + "<0");
*/
int length=src.length();
if (index + length > capacity())
{
length=capacity()-index;
/*
if (length<0)
throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity());
*/
}
byte[] src_array = src.array();
if (src_array != null)
Portable.arraycopy(src_array, src.getIndex(), _bytes, index, length);
else if (src_array != null)
{
int s=src.getIndex();
for (int i=0;i capacity())
{
length=capacity()-index;
/* if (length<0)
throw new IllegalArgumentException("index>capacity(): " + index + ">" + capacity());
*/
}
Portable.arraycopy(b, offset, _bytes, index, length);
return length;
}
/* ------------------------------------------------------------ */
/** Wrap a byte array.
* @param b
* @param off
* @param len
*/
public void wrap(byte[] b, int off, int len)
{
if (isReadOnly()) throw new IllegalStateException(__READONLY);
if (isImmutable()) throw new IllegalStateException(__IMMUTABLE);
_bytes=b;
clear();
setGetIndex(off);
setPutIndex(off+len);
}
/* ------------------------------------------------------------ */
/** Wrap a byte array
* @param b
*/
public void wrap(byte[] b)
{
if (isReadOnly()) throw new IllegalStateException(__READONLY);
if (isImmutable()) throw new IllegalStateException(__IMMUTABLE);
_bytes=b;
setGetIndex(0);
setPutIndex(b.length);
}
/* ------------------------------------------------------------ */
public void writeTo(OutputStream out)
throws IOException
{
out.write(_bytes,getIndex(),length());
clear();
}
/* ------------------------------------------------------------ */
public int readFrom(InputStream in,int max) throws IOException
{
if (max<0||max>space())
max=space();
int p = putIndex();
int len=0, total=0, available=max;
while (total0)
{
p += len;
total += len;
available -= len;
setPutIndex(p);
}
if (in.available()<=0)
break;
}
if (len<0 && total==0)
return -1;
return total;
}
/* ------------------------------------------------------------ */
public int space()
{
return _bytes.length - _put;
}
/* ------------------------------------------------------------ */
/* ------------------------------------------------------------ */
/* ------------------------------------------------------------ */
public static class CaseInsensitive extends ByteArrayBuffer implements Buffer.CaseInsensitve
{
public CaseInsensitive(String s)
{
super(s);
}
public CaseInsensitive(byte[] b, int o, int l, int rw)
{
super(b,o,l,rw);
}
public boolean equals(Object obj)
{
return equalsIgnoreCase((Buffer)obj);
}
}
}
