/*
* Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.quercus.env;
import com.caucho.vfs.StreamImplInputStream;
import com.caucho.vfs.TempBuffer;
import com.caucho.vfs.TempReadStream;
import java.io.InputStream;
import java.io.Serializable;
/**
* Represents a PHP string value implemented as a TempBuffer, with
* encoding iso-8859-1..
*/
public class TempBufferBytesValue
extends BytesValue
implements Serializable
{
/**
*
*/
private static final long serialVersionUID = 1L;
private TempBuffer _head;
private String _string;
public TempBufferBytesValue(TempBuffer buffer)
{
_head = buffer;
}
/*
* Creates an empty string builder of the same type.
*/
@Override
public StringValue createStringBuilder()
{
return new BinaryBuilderValue();
}
/*
* Creates an empty string builder of the same type.
*/
@Override
public StringValue createStringBuilder(int length)
{
return new BinaryBuilderValue(length);
}
/**
*
* @return _head as inputstream
*/
public InputStream toInputStream()
{
TempReadStream ts = new TempReadStream(_head);
ts.setFreeWhenDone(false);
return new StreamImplInputStream(ts);
}
//
// CharSegment
//
/**
* Returns the length as a string.
*/
public int length()
{
int len = 0;
for (TempBuffer ptr = _head; ptr != null; ptr = ptr.getNext()) {
len += ptr.getLength();
}
return len;
}
/**
* Returns the character at a given position
*/
public char charAt(int index)
{
int len = 0;
for (TempBuffer ptr = _head; ptr != null; ptr = ptr.getNext()) {
int sublen = ptr.getLength();
if (index < len + sublen) {
return (char) (ptr.getBuffer()[index - len] & 0xff);
}
len += sublen;
}
return 0;
}
/**
* Prints the value.
*
* @param env
*/
public void print(Env env)
{
for (TempBuffer ptr = _head; ptr != null; ptr = ptr.getNext()) {
env.write(ptr.getBuffer(), 0, ptr.getLength());
}
}
/**
* Converts to a string.
*/
public String toString()
{
if (_string == null) {
char []cbuf = new char[length()];
int i = 0;
for (TempBuffer ptr = _head; ptr != null; ptr = ptr.getNext()) {
byte []buf = ptr.getBuffer();
int len = ptr.getLength();
for (int j = 0; j < len; j++)
cbuf[i++] = (char) (buf[j] & 0xff);
}
_string = new String(cbuf);
}
return _string;
}
/**
* Calculate the hash code
*/
public int hashCode()
{
// Matches hashCode calculated in StringValue
int hash = 37;
for (TempBuffer ptr = _head; ptr != null; ptr = ptr.getNext()) {
byte []buffer = ptr.getBuffer();
int length = ptr.getLength();
for (int i = 0; i < length; i++)
hash = 65521 * hash + (buffer[i] & 0xff);
}
return hash;
}
/**
* Test for equality.
*/
public boolean equals(Object o)
{
if (this == o)
return true;
else if ((o instanceof TempBufferBytesValue)) {
TempBufferBytesValue tb = (TempBufferBytesValue) o;
TempBuffer ptrA = _head;
TempBuffer ptrB = tb._head;
while (ptrA != null && ptrB != null) {
byte []bufferA = ptrA.getBuffer();
int lengthA = ptrA.getLength();
byte []bufferB = ptrB.getBuffer();
int lengthB = ptrB.getLength();
if (lengthA != lengthB)
return false;
while (--lengthA >= 0) {
if (bufferA[lengthA] != bufferB[lengthA])
return false;
}
ptrA = ptrA.getNext();
ptrB = ptrB.getNext();
}
return ptrA == null && ptrB == null;
}
else
return super.equals(o);
}
public byte[] toBytes()
{
int len = 0;
byte []buffer = new byte[length()];
for (TempBuffer ptr = _head; ptr != null; ptr = ptr.getNext()) {
System.arraycopy(ptr.getBuffer(), 0, buffer, len, ptr.getLength());
len += ptr.getLength();
}
return buffer;
}
//
// Java Serialization
//
public Object writeReplace()
{
return new BinaryBuilderValue(toBytes());
}
}