diff options
Diffstat (limited to 'admin/survey/excel/PHPExcel/Shared/OLERead.php')
| -rw-r--r-- | admin/survey/excel/PHPExcel/Shared/OLERead.php | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/admin/survey/excel/PHPExcel/Shared/OLERead.php b/admin/survey/excel/PHPExcel/Shared/OLERead.php new file mode 100644 index 0000000..1c2c0ac --- /dev/null +++ b/admin/survey/excel/PHPExcel/Shared/OLERead.php @@ -0,0 +1,317 @@ +<?php
+/**
+ * PHPExcel
+ *
+ * Copyright (c) 2006 - 2012 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 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
+ * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
+ * @version 1.7.8, 2012-10-12
+ */
+
+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 $sFileName string Filename
+ * @throws Exception
+ */
+ public function read($sFileName)
+ {
+ // Check if file exists and is readable
+ if(!is_readable($sFileName)) {
+ throw new Exception("Could not open " . $sFileName . " for reading! File does not exist, or it is not readable.");
+ }
+
+ // Get the file data
+ $this->data = file_get_contents($sFileName);
+
+ // Check OLE identifier
+ if (substr($this->data, 0, 8) != self::IDENTIFIER_OLE) {
+ throw new Exception('The filename ' . $sFileName . ' is not recognised as an OLE file');
+ }
+
+ // 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 = $index = 0;
+ $this->bigBlockChain = array();
+
+ $bbs = self::BIG_BLOCK_SIZE / 4;
+ for ($i = 0; $i < $this->numBigBlockDepotBlocks; ++$i) {
+ $pos = ($bigBlockDepotBlocks[$i] + 1) * self::BIG_BLOCK_SIZE;
+
+ for ($j = 0 ; $j < $bbs; ++$j) {
+ $this->bigBlockChain[$index] = self::_GetInt4d($this->data, $pos);
+ $pos += 4 ;
+ ++$index;
+ }
+ }
+
+ $pos = $index = 0;
+ $sbdBlock = $this->sbdStartBlock;
+ $this->smallBlockChain = array();
+
+ while ($sbdBlock != -2) {
+ $pos = ($sbdBlock + 1) * self::BIG_BLOCK_SIZE;
+
+ for ($j = 0; $j < $bbs; ++$j) {
+ $this->smallBlockChain[$index] = self::_GetInt4d($this->data, $pos);
+ $pos += 4;
+ ++$index;
+ }
+
+ $sbdBlock = $this->bigBlockChain[$sbdBlock];
+ }
+
+ // 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 = $this->smallBlockChain[$block];
+ }
+
+ 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 = $this->bigBlockChain[$block];
+ }
+
+ 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 = $this->bigBlockChain[$block];
+ }
+ 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' => $size);
+
+ // Workbook directory entry (BIFF5 uses Book, BIFF8 uses Workbook)
+ if (($name == 'Workbook') || ($name == 'Book') || ($name == 'WORKBOOK') || ($name == 'BOOK')) {
+ $this->wrkbook = count($this->props) - 1;
+ }
+
+ // Root entry
+ if ($name == 'Root Entry' || $name == 'ROOT ENTRY' || $name == 'R') {
+ $this->rootentry = count($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;
+ }
+
+}
|