318 lines
9.3 KiB
PHP
318 lines
9.3 KiB
PHP
<?php
|
|
/**
|
|
* PHPExcel
|
|
*
|
|
* Copyright (c) 2006 - 2014 PHPExcel
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
* @category PHPExcel
|
|
* @package PHPExcel_Shared
|
|
* @copyright Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
|
|
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
|
|
* @version 1.8.0, 2014-03-02
|
|
*/
|
|
|
|
defined('IDENTIFIER_OLE') ||
|
|
define('IDENTIFIER_OLE', pack('CCCCCCCC', 0xd0, 0xcf, 0x11, 0xe0, 0xa1, 0xb1, 0x1a, 0xe1));
|
|
|
|
class PHPExcel_Shared_OLERead {
|
|
private $data = '';
|
|
|
|
// OLE identifier
|
|
const IDENTIFIER_OLE = IDENTIFIER_OLE;
|
|
|
|
// Size of a sector = 512 bytes
|
|
const BIG_BLOCK_SIZE = 0x200;
|
|
|
|
// Size of a short sector = 64 bytes
|
|
const SMALL_BLOCK_SIZE = 0x40;
|
|
|
|
// Size of a directory entry always = 128 bytes
|
|
const PROPERTY_STORAGE_BLOCK_SIZE = 0x80;
|
|
|
|
// Minimum size of a standard stream = 4096 bytes, streams smaller than this are stored as short streams
|
|
const SMALL_BLOCK_THRESHOLD = 0x1000;
|
|
|
|
// header offsets
|
|
const NUM_BIG_BLOCK_DEPOT_BLOCKS_POS = 0x2c;
|
|
const ROOT_START_BLOCK_POS = 0x30;
|
|
const SMALL_BLOCK_DEPOT_BLOCK_POS = 0x3c;
|
|
const EXTENSION_BLOCK_POS = 0x44;
|
|
const NUM_EXTENSION_BLOCK_POS = 0x48;
|
|
const BIG_BLOCK_DEPOT_BLOCKS_POS = 0x4c;
|
|
|
|
// property storage offsets (directory offsets)
|
|
const SIZE_OF_NAME_POS = 0x40;
|
|
const TYPE_POS = 0x42;
|
|
const START_BLOCK_POS = 0x74;
|
|
const SIZE_POS = 0x78;
|
|
|
|
|
|
|
|
public $wrkbook = null;
|
|
public $summaryInformation = null;
|
|
public $documentSummaryInformation = null;
|
|
|
|
|
|
/**
|
|
* Read the file
|
|
*
|
|
* @param $sFileName string Filename
|
|
* @throws PHPExcel_Reader_Exception
|
|
*/
|
|
public function read($sFileName)
|
|
{
|
|
// Check if file exists and is readable
|
|
if(!is_readable($sFileName)) {
|
|
throw new PHPExcel_Reader_Exception("Could not open " . $sFileName . " for reading! File does not exist, or it is not readable.");
|
|
}
|
|
|
|
// Get the file identifier
|
|
// Don't bother reading the whole file until we know it's a valid OLE file
|
|
$this->data = file_get_contents($sFileName, FALSE, NULL, 0, 8);
|
|
|
|
// Check OLE identifier
|
|
if ($this->data != self::IDENTIFIER_OLE) {
|
|
throw new PHPExcel_Reader_Exception('The filename ' . $sFileName . ' is not recognised as an OLE file');
|
|
}
|
|
|
|
// Get the file data
|
|
$this->data = file_get_contents($sFileName);
|
|
|
|
// Total number of sectors used for the SAT
|
|
$this->numBigBlockDepotBlocks = self::_GetInt4d($this->data, self::NUM_BIG_BLOCK_DEPOT_BLOCKS_POS);
|
|
|
|
// SecID of the first sector of the directory stream
|
|
$this->rootStartBlock = self::_GetInt4d($this->data, self::ROOT_START_BLOCK_POS);
|
|
|
|
// SecID of the first sector of the SSAT (or -2 if not extant)
|
|
$this->sbdStartBlock = self::_GetInt4d($this->data, self::SMALL_BLOCK_DEPOT_BLOCK_POS);
|
|
|
|
// SecID of the first sector of the MSAT (or -2 if no additional sectors are used)
|
|
$this->extensionBlock = self::_GetInt4d($this->data, self::EXTENSION_BLOCK_POS);
|
|
|
|
// Total number of sectors used by MSAT
|
|
$this->numExtensionBlocks = self::_GetInt4d($this->data, self::NUM_EXTENSION_BLOCK_POS);
|
|
|
|
$bigBlockDepotBlocks = array();
|
|
$pos = self::BIG_BLOCK_DEPOT_BLOCKS_POS;
|
|
|
|
$bbdBlocks = $this->numBigBlockDepotBlocks;
|
|
|
|
if ($this->numExtensionBlocks != 0) {
|
|
$bbdBlocks = (self::BIG_BLOCK_SIZE - self::BIG_BLOCK_DEPOT_BLOCKS_POS)/4;
|
|
}
|
|
|
|
for ($i = 0; $i < $bbdBlocks; ++$i) {
|
|
$bigBlockDepotBlocks[$i] = self::_GetInt4d($this->data, $pos);
|
|
$pos += 4;
|
|
}
|
|
|
|
for ($j = 0; $j < $this->numExtensionBlocks; ++$j) {
|
|
$pos = ($this->extensionBlock + 1) * self::BIG_BLOCK_SIZE;
|
|
$blocksToRead = min($this->numBigBlockDepotBlocks - $bbdBlocks, self::BIG_BLOCK_SIZE / 4 - 1);
|
|
|
|
for ($i = $bbdBlocks; $i < $bbdBlocks + $blocksToRead; ++$i) {
|
|
$bigBlockDepotBlocks[$i] = self::_GetInt4d($this->data, $pos);
|
|
$pos += 4;
|
|
}
|
|
|
|
$bbdBlocks += $blocksToRead;
|
|
if ($bbdBlocks < $this->numBigBlockDepotBlocks) {
|
|
$this->extensionBlock = self::_GetInt4d($this->data, $pos);
|
|
}
|
|
}
|
|
|
|
$pos = 0;
|
|
$this->bigBlockChain = '';
|
|
$bbs = self::BIG_BLOCK_SIZE / 4;
|
|
for ($i = 0; $i < $this->numBigBlockDepotBlocks; ++$i) {
|
|
$pos = ($bigBlockDepotBlocks[$i] + 1) * self::BIG_BLOCK_SIZE;
|
|
|
|
$this->bigBlockChain .= substr($this->data, $pos, 4*$bbs);
|
|
$pos += 4*$bbs;
|
|
}
|
|
|
|
$pos = 0;
|
|
$sbdBlock = $this->sbdStartBlock;
|
|
$this->smallBlockChain = '';
|
|
while ($sbdBlock != -2) {
|
|
$pos = ($sbdBlock + 1) * self::BIG_BLOCK_SIZE;
|
|
|
|
$this->smallBlockChain .= substr($this->data, $pos, 4*$bbs);
|
|
$pos += 4*$bbs;
|
|
|
|
$sbdBlock = self::_GetInt4d($this->bigBlockChain, $sbdBlock*4);
|
|
}
|
|
|
|
// read the directory stream
|
|
$block = $this->rootStartBlock;
|
|
$this->entry = $this->_readData($block);
|
|
|
|
$this->_readPropertySets();
|
|
}
|
|
|
|
/**
|
|
* Extract binary stream data
|
|
*
|
|
* @return string
|
|
*/
|
|
public function getStream($stream)
|
|
{
|
|
if ($stream === NULL) {
|
|
return null;
|
|
}
|
|
|
|
$streamData = '';
|
|
|
|
if ($this->props[$stream]['size'] < self::SMALL_BLOCK_THRESHOLD) {
|
|
$rootdata = $this->_readData($this->props[$this->rootentry]['startBlock']);
|
|
|
|
$block = $this->props[$stream]['startBlock'];
|
|
|
|
while ($block != -2) {
|
|
$pos = $block * self::SMALL_BLOCK_SIZE;
|
|
$streamData .= substr($rootdata, $pos, self::SMALL_BLOCK_SIZE);
|
|
|
|
$block = self::_GetInt4d($this->smallBlockChain, $block*4);
|
|
}
|
|
|
|
return $streamData;
|
|
} else {
|
|
$numBlocks = $this->props[$stream]['size'] / self::BIG_BLOCK_SIZE;
|
|
if ($this->props[$stream]['size'] % self::BIG_BLOCK_SIZE != 0) {
|
|
++$numBlocks;
|
|
}
|
|
|
|
if ($numBlocks == 0) return '';
|
|
|
|
$block = $this->props[$stream]['startBlock'];
|
|
|
|
while ($block != -2) {
|
|
$pos = ($block + 1) * self::BIG_BLOCK_SIZE;
|
|
$streamData .= substr($this->data, $pos, self::BIG_BLOCK_SIZE);
|
|
$block = self::_GetInt4d($this->bigBlockChain, $block*4);
|
|
}
|
|
|
|
return $streamData;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Read a standard stream (by joining sectors using information from SAT)
|
|
*
|
|
* @param int $bl Sector ID where the stream starts
|
|
* @return string Data for standard stream
|
|
*/
|
|
private function _readData($bl)
|
|
{
|
|
$block = $bl;
|
|
$data = '';
|
|
|
|
while ($block != -2) {
|
|
$pos = ($block + 1) * self::BIG_BLOCK_SIZE;
|
|
$data .= substr($this->data, $pos, self::BIG_BLOCK_SIZE);
|
|
$block = self::_GetInt4d($this->bigBlockChain, $block*4);
|
|
}
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* Read entries in the directory stream.
|
|
*/
|
|
private function _readPropertySets() {
|
|
$offset = 0;
|
|
|
|
// loop through entires, each entry is 128 bytes
|
|
$entryLen = strlen($this->entry);
|
|
while ($offset < $entryLen) {
|
|
// entry data (128 bytes)
|
|
$d = substr($this->entry, $offset, self::PROPERTY_STORAGE_BLOCK_SIZE);
|
|
|
|
// size in bytes of name
|
|
$nameSize = ord($d[self::SIZE_OF_NAME_POS]) | (ord($d[self::SIZE_OF_NAME_POS+1]) << 8);
|
|
|
|
// type of entry
|
|
$type = ord($d[self::TYPE_POS]);
|
|
|
|
// sectorID of first sector or short sector, if this entry refers to a stream (the case with workbook)
|
|
// sectorID of first sector of the short-stream container stream, if this entry is root entry
|
|
$startBlock = self::_GetInt4d($d, self::START_BLOCK_POS);
|
|
|
|
$size = self::_GetInt4d($d, self::SIZE_POS);
|
|
|
|
$name = str_replace("\x00", "", substr($d,0,$nameSize));
|
|
|
|
|
|
$this->props[] = array (
|
|
'name' => $name,
|
|
'type' => $type,
|
|
'startBlock' => $startBlock,
|
|
'size' => $size);
|
|
|
|
// tmp helper to simplify checks
|
|
$upName = strtoupper($name);
|
|
|
|
// Workbook directory entry (BIFF5 uses Book, BIFF8 uses Workbook)
|
|
if (($upName === 'WORKBOOK') || ($upName === 'BOOK')) {
|
|
$this->wrkbook = count($this->props) - 1;
|
|
}
|
|
else if ( $upName === 'ROOT ENTRY' || $upName === 'R') {
|
|
// Root entry
|
|
$this->rootentry = count($this->props) - 1;
|
|
}
|
|
|
|
// Summary information
|
|
if ($name == chr(5) . 'SummaryInformation') {
|
|
// echo 'Summary Information<br />';
|
|
$this->summaryInformation = count($this->props) - 1;
|
|
}
|
|
|
|
// Additional Document Summary information
|
|
if ($name == chr(5) . 'DocumentSummaryInformation') {
|
|
// echo 'Document Summary Information<br />';
|
|
$this->documentSummaryInformation = count($this->props) - 1;
|
|
}
|
|
|
|
$offset += self::PROPERTY_STORAGE_BLOCK_SIZE;
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Read 4 bytes of data at specified position
|
|
*
|
|
* @param string $data
|
|
* @param int $pos
|
|
* @return int
|
|
*/
|
|
private static function _GetInt4d($data, $pos)
|
|
{
|
|
// FIX: represent numbers correctly on 64-bit system
|
|
// http://sourceforge.net/tracker/index.php?func=detail&aid=1487372&group_id=99160&atid=623334
|
|
// Hacked by Andreas Rehm 2006 to ensure correct result of the <<24 block on 32 and 64bit systems
|
|
$_or_24 = ord($data[$pos + 3]);
|
|
if ($_or_24 >= 128) {
|
|
// negative number
|
|
$_ord_24 = -abs((256 - $_or_24) << 24);
|
|
} else {
|
|
$_ord_24 = ($_or_24 & 127) << 24;
|
|
}
|
|
return ord($data[$pos]) | (ord($data[$pos + 1]) << 8) | (ord($data[$pos + 2]) << 16) | $_ord_24;
|
|
}
|
|
|
|
}
|