--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/web/Zend/Amf/Util/BinaryStream.php Mon Dec 13 18:29:26 2010 +0100
@@ -0,0 +1,285 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category Zend
+ * @package Zend_Amf
+ * @subpackage Util
+ * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ * @version $Id: BinaryStream.php 22101 2010-05-04 20:07:13Z matthew $
+ */
+
+/**
+ * Utility class to walk through a data stream byte by byte with conventional names
+ *
+ * @package Zend_Amf
+ * @subpackage Util
+ * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ */
+class Zend_Amf_Util_BinaryStream
+{
+ /**
+ * @var string Byte stream
+ */
+ protected $_stream;
+
+ /**
+ * @var int Length of stream
+ */
+ protected $_streamLength;
+
+ /**
+ * @var bool BigEndian encoding?
+ */
+ protected $_bigEndian;
+
+ /**
+ * @var int Current position in stream
+ */
+ protected $_needle;
+
+ /**
+ * Constructor
+ *
+ * Create a reference to a byte stream that is going to be parsed or created
+ * by the methods in the class. Detect if the class should use big or
+ * little Endian encoding.
+ *
+ * @param string $stream use '' if creating a new stream or pass a string if reading.
+ * @return void
+ */
+ public function __construct($stream)
+ {
+ if (!is_string($stream)) {
+ require_once 'Zend/Amf/Exception.php';
+ throw new Zend_Amf_Exception('Inputdata is not of type String');
+ }
+
+ $this->_stream = $stream;
+ $this->_needle = 0;
+ $this->_streamLength = strlen($stream);
+ $this->_bigEndian = (pack('l', 1) === "\x00\x00\x00\x01");
+ }
+
+ /**
+ * Returns the current stream
+ *
+ * @return string
+ */
+ public function getStream()
+ {
+ return $this->_stream;
+ }
+
+ /**
+ * Read the number of bytes in a row for the length supplied.
+ *
+ * @todo Should check that there are enough bytes left in the stream we are about to read.
+ * @param int $length
+ * @return string
+ * @throws Zend_Amf_Exception for buffer underrun
+ */
+ public function readBytes($length)
+ {
+ if (($length + $this->_needle) > $this->_streamLength) {
+ require_once 'Zend/Amf/Exception.php';
+ throw new Zend_Amf_Exception('Buffer underrun at needle position: ' . $this->_needle . ' while requesting length: ' . $length);
+ }
+ $bytes = substr($this->_stream, $this->_needle, $length);
+ $this->_needle+= $length;
+ return $bytes;
+ }
+
+ /**
+ * Write any length of bytes to the stream
+ *
+ * Usually a string.
+ *
+ * @param string $bytes
+ * @return Zend_Amf_Util_BinaryStream
+ */
+ public function writeBytes($bytes)
+ {
+ $this->_stream.= $bytes;
+ return $this;
+ }
+
+ /**
+ * Reads a signed byte
+ *
+ * @return int Value is in the range of -128 to 127.
+ */
+ public function readByte()
+ {
+ if (($this->_needle + 1) > $this->_streamLength) {
+ require_once 'Zend/Amf/Exception.php';
+ throw new Zend_Amf_Exception('Buffer underrun at needle position: ' . $this->_needle . ' while requesting length: ' . $length);
+ }
+
+ return ord($this->_stream{$this->_needle++});
+ }
+
+ /**
+ * Writes the passed string into a signed byte on the stream.
+ *
+ * @param string $stream
+ * @return Zend_Amf_Util_BinaryStream
+ */
+ public function writeByte($stream)
+ {
+ $this->_stream.= pack('c', $stream);
+ return $this;
+ }
+
+ /**
+ * Reads a signed 32-bit integer from the data stream.
+ *
+ * @return int Value is in the range of -2147483648 to 2147483647
+ */
+ public function readInt()
+ {
+ return ($this->readByte() << 8) + $this->readByte();
+ }
+
+ /**
+ * Write an the integer to the output stream as a 32 bit signed integer
+ *
+ * @param int $stream
+ * @return Zend_Amf_Util_BinaryStream
+ */
+ public function writeInt($stream)
+ {
+ $this->_stream.= pack('n', $stream);
+ return $this;
+ }
+
+ /**
+ * Reads a UTF-8 string from the data stream
+ *
+ * @return string A UTF-8 string produced by the byte representation of characters
+ */
+ public function readUtf()
+ {
+ $length = $this->readInt();
+ return $this->readBytes($length);
+ }
+
+ /**
+ * Wite a UTF-8 string to the outputstream
+ *
+ * @param string $stream
+ * @return Zend_Amf_Util_BinaryStream
+ */
+ public function writeUtf($stream)
+ {
+ $this->writeInt(strlen($stream));
+ $this->_stream.= $stream;
+ return $this;
+ }
+
+
+ /**
+ * Read a long UTF string
+ *
+ * @return string
+ */
+ public function readLongUtf()
+ {
+ $length = $this->readLong();
+ return $this->readBytes($length);
+ }
+
+ /**
+ * Write a long UTF string to the buffer
+ *
+ * @param string $stream
+ * @return Zend_Amf_Util_BinaryStream
+ */
+ public function writeLongUtf($stream)
+ {
+ $this->writeLong(strlen($stream));
+ $this->_stream.= $stream;
+ }
+
+ /**
+ * Read a long numeric value
+ *
+ * @return double
+ */
+ public function readLong()
+ {
+ return ($this->readByte() << 24) + ($this->readByte() << 16) + ($this->readByte() << 8) + $this->readByte();
+ }
+
+ /**
+ * Write long numeric value to output stream
+ *
+ * @param int|string $stream
+ * @return Zend_Amf_Util_BinaryStream
+ */
+ public function writeLong($stream)
+ {
+ $this->_stream.= pack('N', $stream);
+ return $this;
+ }
+
+ /**
+ * Read a 16 bit unsigned short.
+ *
+ * @todo This could use the unpack() w/ S,n, or v
+ * @return double
+ */
+ public function readUnsignedShort()
+ {
+ $byte1 = $this->readByte();
+ $byte2 = $this->readByte();
+ return (($byte1 << 8) | $byte2);
+ }
+
+ /**
+ * Reads an IEEE 754 double-precision floating point number from the data stream.
+ *
+ * @return double Floating point number
+ */
+ public function readDouble()
+ {
+ $bytes = substr($this->_stream, $this->_needle, 8);
+ $this->_needle+= 8;
+
+ if (!$this->_bigEndian) {
+ $bytes = strrev($bytes);
+ }
+
+ $double = unpack('dflt', $bytes);
+ return $double['flt'];
+ }
+
+ /**
+ * Writes an IEEE 754 double-precision floating point number from the data stream.
+ *
+ * @param string|double $stream
+ * @return Zend_Amf_Util_BinaryStream
+ */
+ public function writeDouble($stream)
+ {
+ $stream = pack('d', $stream);
+ if (!$this->_bigEndian) {
+ $stream = strrev($stream);
+ }
+ $this->_stream.= $stream;
+ return $this;
+ }
+
+}