Added PHP files needed to read XLS files. refs #1249

+<?php
+namespace Tz\Wordpress\Tools\ExcelReader;
+
+define('NUM_BIG_BLOCK_DEPOT_BLOCKS_POS', 0x2c);
+define('SMALL_BLOCK_DEPOT_BLOCK_POS', 0x3c);
+define('ROOT_START_BLOCK_POS', 0x30);
+define('BIG_BLOCK_SIZE', 0x200);
+define('SMALL_BLOCK_SIZE', 0x40);
+define('EXTENSION_BLOCK_POS', 0x44);
+define('NUM_EXTENSION_BLOCK_POS', 0x48);
+define('PROPERTY_STORAGE_BLOCK_SIZE', 0x80);
+define('BIG_BLOCK_DEPOT_BLOCKS_POS', 0x4c);
+define('SMALL_BLOCK_THRESHOLD', 0x1000);
+// property storage offsets
+define('SIZE_OF_NAME_POS', 0x40);
+define('TYPE_POS', 0x42);
+define('START_BLOCK_POS', 0x74);
+define('SIZE_POS', 0x78);
+define('IDENTIFIER_OLE', pack("CCCCCCCC",0xd0,0xcf,0x11,0xe0,0xa1,0xb1,0x1a,0xe1));
+
+//echo 'ROOT_START_BLOCK_POS = '.ROOT_START_BLOCK_POS."\n";
+
+//echo bin2hex($data[ROOT_START_BLOCK_POS])."\n";
+//echo "a=";
+//echo $data[ROOT_START_BLOCK_POS];
+//function log
+
+function GetInt4d($data, $pos)
+{
+	$value = ord($data[$pos]) | (ord($data[$pos+1])	<< 8) | (ord($data[$pos+2]) << 16) | (ord($data[$pos+3]) << 24);
+	if ($value>=4294967294)
+	{
+		$value=-2;
+	}
+	return $value;
+}
+
+
+class OLERead {
+    var $data = '';
+    
+    
+    function OLERead(){
+        
+        
+    }
+    
+    function read($sFileName){
+        
+    	// check if file exist and is readable (Darko Miljanovic)
+    	if(!is_readable($sFileName)) {
+    		$this->error = 1;
+    		return false;
+    	}
+    	
+    	$this->data = @file_get_contents($sFileName);
+    	if (!$this->data) { 
+    		$this->error = 1; 
+    		return false; 
+   		}
+   		//echo IDENTIFIER_OLE;
+   		//echo 'start';
+   		if (substr($this->data, 0, 8) != IDENTIFIER_OLE) {
+    		$this->error = 1; 
+    		return false; 
+   		}
+        $this->numBigBlockDepotBlocks = GetInt4d($this->data, NUM_BIG_BLOCK_DEPOT_BLOCKS_POS);
+        $this->sbdStartBlock = GetInt4d($this->data, SMALL_BLOCK_DEPOT_BLOCK_POS);
+        $this->rootStartBlock = GetInt4d($this->data, ROOT_START_BLOCK_POS);
+        $this->extensionBlock = GetInt4d($this->data, EXTENSION_BLOCK_POS);
+        $this->numExtensionBlocks = GetInt4d($this->data, NUM_EXTENSION_BLOCK_POS);
+        
+	/*
+        echo $this->numBigBlockDepotBlocks." ";
+        echo $this->sbdStartBlock." ";
+        echo $this->rootStartBlock." ";
+        echo $this->extensionBlock." ";
+        echo $this->numExtensionBlocks." ";
+        */
+        //echo "sbdStartBlock = $this->sbdStartBlock\n";
+        $bigBlockDepotBlocks = array();
+        $pos = BIG_BLOCK_DEPOT_BLOCKS_POS;
+       // echo "pos = $pos";
+	$bbdBlocks = $this->numBigBlockDepotBlocks;
+        
+            if ($this->numExtensionBlocks != 0) {
+                $bbdBlocks = (BIG_BLOCK_SIZE - BIG_BLOCK_DEPOT_BLOCKS_POS)/4; 
+            }
+        
+        for ($i = 0; $i < $bbdBlocks; $i++) {
+              $bigBlockDepotBlocks[$i] = GetInt4d($this->data, $pos);
+              $pos += 4;
+        }
+        
+        
+        for ($j = 0; $j < $this->numExtensionBlocks; $j++) {
+            $pos = ($this->extensionBlock + 1) * BIG_BLOCK_SIZE;
+            $blocksToRead = min($this->numBigBlockDepotBlocks - $bbdBlocks, BIG_BLOCK_SIZE / 4 - 1);
+
+            for ($i = $bbdBlocks; $i < $bbdBlocks + $blocksToRead; $i++) {
+                $bigBlockDepotBlocks[$i] = GetInt4d($this->data, $pos);
+                $pos += 4;
+            }   
+
+            $bbdBlocks += $blocksToRead;
+            if ($bbdBlocks < $this->numBigBlockDepotBlocks) {
+                $this->extensionBlock = GetInt4d($this->data, $pos);
+            }
+        }
+
+       // var_dump($bigBlockDepotBlocks);
+        
+        // readBigBlockDepot
+        $pos = 0;
+        $index = 0;
+        $this->bigBlockChain = array();
+        
+        for ($i = 0; $i < $this->numBigBlockDepotBlocks; $i++) {
+            $pos = ($bigBlockDepotBlocks[$i] + 1) * BIG_BLOCK_SIZE;
+            //echo "pos = $pos";	
+            for ($j = 0 ; $j < BIG_BLOCK_SIZE / 4; $j++) {
+                $this->bigBlockChain[$index] = GetInt4d($this->data, $pos);
+                $pos += 4 ;
+                $index++;
+            }
+        }
+
+	//var_dump($this->bigBlockChain);
+        //echo '=====2';
+        // readSmallBlockDepot();
+        $pos = 0;
+	    $index = 0;
+	    $sbdBlock = $this->sbdStartBlock;
+	    $this->smallBlockChain = array();
+	
+	    while ($sbdBlock != -2) {
+	
+	      $pos = ($sbdBlock + 1) * BIG_BLOCK_SIZE;
+	
+	      for ($j = 0; $j < BIG_BLOCK_SIZE / 4; $j++) {
+	        $this->smallBlockChain[$index] = GetInt4d($this->data, $pos);
+	        $pos += 4;
+	        $index++;
+	      }
+	
+	      $sbdBlock = $this->bigBlockChain[$sbdBlock];
+	    }
+
+        
+        // readData(rootStartBlock)
+        $block = $this->rootStartBlock;
+        $pos = 0;
+        $this->entry = $this->__readData($block);
+        
+        /*
+        while ($block != -2)  {
+            $pos = ($block + 1) * BIG_BLOCK_SIZE;
+            $this->entry = $this->entry.substr($this->data, $pos, BIG_BLOCK_SIZE);
+            $block = $this->bigBlockChain[$block];
+        }
+        */
+        //echo '==='.$this->entry."===";
+        $this->__readPropertySets();
+
+    }
+    
+     function __readData($bl) {
+        $block = $bl;
+        $pos = 0;
+        $data = '';
+        
+        while ($block != -2)  {
+            $pos = ($block + 1) * BIG_BLOCK_SIZE;
+            $data = $data.substr($this->data, $pos, BIG_BLOCK_SIZE);
+            //echo "pos = $pos data=$data\n";	
+	    $block = $this->bigBlockChain[$block];
+        }
+		return $data;
+     }
+        
+    function __readPropertySets(){
+        $offset = 0;
+        //var_dump($this->entry);
+        while ($offset < strlen($this->entry)) {
+              $d = substr($this->entry, $offset, PROPERTY_STORAGE_BLOCK_SIZE);
+            
+              $nameSize = ord($d[SIZE_OF_NAME_POS]) | (ord($d[SIZE_OF_NAME_POS+1]) << 8);
+              
+              $type = ord($d[TYPE_POS]);
+              //$maxBlock = strlen($d) / BIG_BLOCK_SIZE - 1;
+        
+              $startBlock = GetInt4d($d, START_BLOCK_POS);
+              $size = GetInt4d($d, SIZE_POS);
+        
+            $name = '';
+            for ($i = 0; $i < $nameSize ; $i++) {
+              $name .= $d[$i];
+            }
+            
+            $name = str_replace("\x00", "", $name);
+            
+            $this->props[] = array (
+                'name' => $name, 
+                'type' => $type,
+                'startBlock' => $startBlock,
+                'size' => $size);
+
+            if (($name == "Workbook") || ($name == "Book")) {
+                $this->wrkbook = count($this->props) - 1;
+            }
+
+            if ($name == "Root Entry") {
+                $this->rootentry = count($this->props) - 1;
+            }
+            
+            //echo "name ==$name=\n";
+
+            
+            $offset += PROPERTY_STORAGE_BLOCK_SIZE;
+        }   
+        
+    }
+    
+    
+    function getWorkBook(){
+    	if ($this->props[$this->wrkbook]['size'] < SMALL_BLOCK_THRESHOLD){
+//    	  getSmallBlockStream(PropertyStorage ps)
+
+			$rootdata = $this->__readData($this->props[$this->rootentry]['startBlock']);
+	        
+			$streamData = '';
+	        $block = $this->props[$this->wrkbook]['startBlock'];
+	        //$count = 0;
+	        $pos = 0;
+		    while ($block != -2) {
+      	          $pos = $block * SMALL_BLOCK_SIZE;
+		          $streamData .= substr($rootdata, $pos, SMALL_BLOCK_SIZE);
+
+			      $block = $this->smallBlockChain[$block];
+		    }
+			
+		    return $streamData;
+    		
+
+    	}else{
+    	
+	        $numBlocks = $this->props[$this->wrkbook]['size'] / BIG_BLOCK_SIZE;
+	        if ($this->props[$this->wrkbook]['size'] % BIG_BLOCK_SIZE != 0) {
+	            $numBlocks++;
+	        }
+	        
+	        if ($numBlocks == 0) return '';
+	        
+	        //echo "numBlocks = $numBlocks\n";
+	    //byte[] streamData = new byte[numBlocks * BIG_BLOCK_SIZE];
+	        //print_r($this->wrkbook);
+	        $streamData = '';
+	        $block = $this->props[$this->wrkbook]['startBlock'];
+	        //$count = 0;
+	        $pos = 0;
+	        //echo "block = $block";
+	        while ($block != -2) {
+	          $pos = ($block + 1) * BIG_BLOCK_SIZE;
+	          $streamData .= substr($this->data, $pos, BIG_BLOCK_SIZE);
+	          $block = $this->bigBlockChain[$block];
+	        }   
+	        //echo 'stream'.$streamData;
+	        return $streamData;
+    	}
+    }
+    
+}
+?>
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