Added Support for Id3v1 Tag Reading and Started the Test Cases for it.

library/Zend/Id3.php

@@ -19,19 +19,107 @@ class Zend_Id3
 	 */
 	const FREAD_BUFFER_SIZE = 16384;
 
+	/**
+	 * Name of the file
+	 *
+	 * @var string
+	 */
+	protected $_filename;
+
+	/**
+	 * File Pointer
+	 *
+	 * @var resource
+	 */
+	protected $_filePointer;
+
+	/**
+	 * id3 tag info
+	 *
+	 * @var array
+	 */
+	protected $_info = array();
+
 	/**
 	 *
 	 */
 	function __construct()
 	{
+		// nothing yet
+	}
+
+	/**
+	 *
+	 * @param $filename string
+	 */
+	public function analyze($filename)
+	{
+		// Remote files not supported
+		if (preg_match('#^([a-z][a-z0-9+.-]+):(//)?(.*?@)?#i', $filename)) {
+			include_once 'Zend/Id3/Exception.php';
+			throw new Zend_Id3_Exception('Remote files are not supported');
+		}
+
+		$this->_filename = $filename;
 
+		// Open local file
+		if (false === ($this->_filePointer = @fopen($this->_filename, 'rb'))) {
+			include_once 'Zend/Id3/Exception.php';
+			throw new Zend_Id3_Exception('Could not open file "' . $filename  . "'");
+		}
+
+		// Set filesize related parameters
+		$this->_info['filesize']     = filesize($filename);
+		$this->_info['avdataoffset'] = 0;
+		$this->_info['avdataend']    = $this->info['filesize'];
+
+
+		foreach(array('id3v1') as $tagName) {
+			switch($tagName) {
+				case 'id3v1':
+					include_once 'Zend/Id3/Adapter/Id3v1.php';
+					$tag = new Zend_Id3_Adapter_Id3v1($this);
+					$tag->analyze();
+					break;
+			}
+		}
+
+		fclose($this->_filePointer);
+
+
+		return $this->_info;
+	}
+
+	/**
+	 * Gets the open file pointer
+	 *
+	 * @return resource
+	 */
+	public function getFilePointer()
+	{
+		return $this->_filePointer;
+	}
+
+	/**
+	 * Gets the file info
+	 *
+	 * @return array
+	 */
+	public function getFileInfo()
+	{
+		return $this->_info;
 	}
 
 	/**
+	 * Sets the file info
 	 *
+	 * @param array $info
+	 * @return Zend_Id3
 	 */
-	public static function analize()
+	public function setFileInfo(array $info)
 	{
+		$this->_info = $info;
 
+		return $this;
 	}
 }

library/Zend/Id3/Adapter/Abstract.php

@@ -0,0 +1,114 @@
+<?php
+/**
+ * Zend_Id3_Adapter_Abstract
+ *
+ * @uses
+ * @package    Zend
+ * @category   Id3
+ * @copyright  Copyright (C) 2008 - Present, Jon Whitcraft
+ * @author     Jon Whitcraft <jon.zf@mac.com>
+ * @license    New BSD {@link http://www.opensource.org/licenses/bsd-license.php}
+ * @version    $Id: $
+ */
+abstract class Zend_Id3_Adapter_Abstract
+{
+	/**
+	 * @var Zend_Id3
+	 */
+	protected $_id3;
+
+	/**
+	 * analyzing filepointer or string
+	 *
+	 * @var boolean
+	 */
+	protected $_dataStringFlag = false;
+
+	/**
+	 * string to analyze
+	 *
+	 * @var string
+	 */
+	protected $_dataString;
+
+	/**
+	 * seek position in string
+	 *
+	 * @var integer
+	 */
+	protected $_dataStringPosition = 0;
+
+
+	/**
+	 * Constructor
+	 *
+	 * @param $id3 Zend_Id3
+	 */
+	public function __construct(Zend_Id3 $id3)
+	{
+		$this->_id3 = $id3;
+	}
+
+	/**
+	 * Analyze from the file pointer
+	 * This is implemented from the extending class
+	 */
+	abstract public function analyze();
+
+	/**
+	 * Returns the current position of the file read/write pointer
+	 *
+	 * @return integer
+	 */
+	protected function ftell() {
+
+		if ($this->_dataStringFlag) {
+			return $this->_dataStringPosition;
+		}
+		return ftell($this->_id3->getFilePointer());
+	}
+
+
+	/**
+	 * Read up to the length of passed in bytes
+	 *
+	 * @param integer $bytes
+	 * @return string
+	 */
+	protected function fread($bytes) {
+
+		if ($this->_dataStringFlag) {
+			$this->_dataStringPosition += $bytes;
+			return substr($this->_dataString, $this->_dataStringPosition - $bytes, $bytes);
+		}
+		return fread($this->_id3->getFilePointer(), $bytes);
+	}
+
+
+	/**
+	 * Sets the file position indicator for the file
+	 *
+	 * @param integer $bytes
+	 * @param integer $whence
+	 * @return integer|null
+	 */
+	protected function fseek($bytes, $whence = SEEK_SET) {
+
+		if ($this->_dataStringFlag) {
+			switch ($whence) {
+				case SEEK_SET:
+					$this->_dataStringPosition = $bytes;
+					return;
+
+				case SEEK_CUR:
+					$this->_dataStringPosition += $bytes;
+					return;
+
+				case SEEK_END:
+					$this->_dataStringPosition = strlen($this->_dataString) + $bytes;
+					return;
+			}
+		}
+		return fseek($this->_id3->getFilePointer(), $bytes, $whence);
+	}
+}