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1 parent 215ca7e commit 74db667d29691005bbe468d431fbeba120fe0054 @denis-larka denis-larka committed Apr 8, 2012
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+<?php
+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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