OLERead Class Reference

Collaboration diagram for OLERead:

Public Member Functions
	OLERead ()
	read ($sFileName)
	__readData ($bl)
	__readPropertySets ()
	getWorkBook ()

Data Fields
	$data = ''

Detailed Description

Definition at line 95 of file excel_reader2.php.

Member Function Documentation

OLERead::__readData

(

$bl

)

Definition at line 187 of file excel_reader2.php.

References $data, and BIG_BLOCK_SIZE.

Referenced by getWorkBook(), and read().

                                 {
                $block = $bl;
                $pos = 0;
                $data = '';
                while ($block != -2)  {
                        $pos = ($block + 1) * BIG_BLOCK_SIZE;
                        $data = $data.substr($this->data, $pos, BIG_BLOCK_SIZE);
                        $block = $this->bigBlockChain[$block];
                }
                return $data;
         }

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OLERead::__readPropertySets

(

)

Definition at line 199 of file excel_reader2.php.

References $d, $size, GetInt4d(), PROPERTY_STORAGE_BLOCK_SIZE, SIZE_OF_NAME_POS, SIZE_POS, START_BLOCK_POS, and TYPE_POS.

Referenced by read().

                                     {
                $offset = 0;
                while ($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]);
                        $startBlock = GetInt4d($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' => $size);
                        if ((strtolower($name) == "workbook") || ( strtolower($name) == "book")) {
                                $this->wrkbook = count($this->props) - 1;
                        }
                        if ($name == "Root Entry") {
                                $this->rootentry = count($this->props) - 1;
                        }
                        $offset += PROPERTY_STORAGE_BLOCK_SIZE;
                }

        }

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OLERead::getWorkBook

(

)

Definition at line 229 of file excel_reader2.php.

References __readData(), BIG_BLOCK_SIZE, SMALL_BLOCK_SIZE, and SMALL_BLOCK_THRESHOLD.

                              {
                if ($this->props[$this->wrkbook]['size'] < SMALL_BLOCK_THRESHOLD){
                        $rootdata = $this->__readData($this->props[$this->rootentry]['startBlock']);
                        $streamData = '';
                        $block = $this->props[$this->wrkbook]['startBlock'];
                        $pos = 0;
                        while ($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 '';
                        $streamData = '';
                        $block = $this->props[$this->wrkbook]['startBlock'];
                        $pos = 0;
                        while ($block != -2) {
                          $pos = ($block + 1) * BIG_BLOCK_SIZE;
                          $streamData .= substr($this->data, $pos, BIG_BLOCK_SIZE);
                          $block = $this->bigBlockChain[$block];
                        }
                        return $streamData;
                }
        }

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OLERead::OLERead

(

)

Definition at line 97 of file excel_reader2.php.

{       }

OLERead::read

(

$sFileName

)

Definition at line 99 of file excel_reader2.php.

References __readData(), __readPropertySets(), BIG_BLOCK_DEPOT_BLOCKS_POS, BIG_BLOCK_SIZE, EXTENSION_BLOCK_POS, GetInt4d(), IDENTIFIER_OLE, NUM_BIG_BLOCK_DEPOT_BLOCKS_POS, NUM_EXTENSION_BLOCK_POS, ROOT_START_BLOCK_POS, and SMALL_BLOCK_DEPOT_BLOCK_POS.

                                 {
                // 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) {
                        $this->error = 1;
                        return false;
                }
                if (substr($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);

                $bigBlockDepotBlocks = array();
                $pos = BIG_BLOCK_DEPOT_BLOCKS_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);
                        }
                }

                // 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++;
                        }
                }

                // 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);
                $this->__readPropertySets();
        }

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Field Documentation

OLERead::$data = ''

Definition at line 96 of file excel_reader2.php.

Referenced by __readData().

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The documentation for this class was generated from the following file:

• Modules/DataCollection/libs/ExcelReader/excel_reader2.php