root.php

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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4: */
// +----------------------------------------------------------------------+
// | PHP Version 4                                                        |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2002 The PHP Group                                |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.02 of the PHP license,      |
// | that is bundled with this package in the file LICENSE, and is        |
// | available at through the world-wide-web at                           |
// | http://www.php.net/license/2_02.txt.                                 |
// | If you did not receive a copy of the PHP license and are unable to   |
// | obtain it through the world-wide-web, please send a note to          |
// | [e-mail] so we can mail you a copy immediately.               |
// +----------------------------------------------------------------------+
// | Author: Xavier Noguer <[e-mail]>                              |
// | Based on OLE::Storage_Lite by Kawai, Takanori                        |
// +----------------------------------------------------------------------+
//
// $Id: Root.php,v 1.9 2005/04/23 21:53:49 dufuz Exp $


require_once 'OLE/PPS.php';

/**
* Class for creating Root PPS's for OLE containers
*
* @author   Xavier Noguer <[e-mail]>
* @category Structures
* @package  OLE
*/
class OLE_PPS_Root extends OLE_PPS
{
    /**
    * The temporary dir for storing the OLE file
    * @var string
    */
    var $_tmp_dir;
    
    /**
    * Constructor
    *
    * @access public
    * @param integer $time_1st A timestamp
    * @param integer $time_2nd A timestamp
    */
    function OLE_PPS_Root($time_1st, $time_2nd, $raChild)
    {
        $this->_tmp_dir = '';
        $this->OLE_PPS(
           null, 
           OLE::Asc2Ucs('Root Entry'),
           OLE_PPS_TYPE_ROOT,
           null,
           null,
           null,
           $time_1st,
           $time_2nd,
           null,
           $raChild);
    }

    /**
    * Sets the temp dir used for storing the OLE file
    *
    * @access public
    * @param string $dir The dir to be used as temp dir
    * @return true if given dir is valid, false otherwise
    */
    function setTempDir($dir)
    {
        if (is_dir($dir)) {
            $this->_tmp_dir = $dir;
            return true;
        }
        return false;
    }

    /**
    * Method for saving the whole OLE container (including files).
    * In fact, if called with an empty argument (or '-'), it saves to a
    * temporary file and then outputs it's contents to stdout.
    *
    * @param string $filename The name of the file where to save the OLE container
    * @access public
    * @return mixed true on success, PEAR_Error on failure
    */
    function save($filename)
    {
        // Initial Setting for saving
        $this->_BIG_BLOCK_SIZE  = pow(2,
                      ((isset($this->_BIG_BLOCK_SIZE))? $this->_adjust2($this->_BIG_BLOCK_SIZE)  : 9));
        $this->_SMALL_BLOCK_SIZE= pow(2, 
                      ((isset($this->_SMALL_BLOCK_SIZE))?  $this->_adjust2($this->_SMALL_BLOCK_SIZE): 6));
 
        // Open temp file if we are sending output to stdout
        if (($filename == '-') || ($filename == '')) {
            $this->_tmp_filename = tempnam($this->_tmp_dir, "OLE_PPS_Root");
            $this->_FILEH_ = @fopen($this->_tmp_filename,"w+b");
            if ($this->_FILEH_ == false) {
                return $this->raiseError("Can't create temporary file.");
            }
        } else {
            $this->_FILEH_ = @fopen($filename, "wb");
            if ($this->_FILEH_ == false) {
                return $this->raiseError("Can't open $filename. It may be in use or protected.");
            }
        }
        // Make an array of PPS's (for Save)
        $aList = array();
        $this->_savePpsSetPnt($aList);
        // calculate values for header
        list($iSBDcnt, $iBBcnt, $iPPScnt) = $this->_calcSize($aList); //, $rhInfo);
        // Save Header
        $this->_saveHeader($iSBDcnt, $iBBcnt, $iPPScnt);
  
        // Make Small Data string (write SBD)
        $this->_data = $this->_makeSmallData($aList);
  
        // Write BB
        $this->_saveBigData($iSBDcnt, $aList);
        // Write PPS
        $this->_savePps($aList);
        // Write Big Block Depot and BDList and Adding Header informations
        $this->_saveBbd($iSBDcnt, $iBBcnt, $iPPScnt);
        // Close File, send it to stdout if necessary
        if (($filename == '-') || ($filename == '')) {
            fseek($this->_FILEH_, 0);
            fpassthru($this->_FILEH_);
            @fclose($this->_FILEH_);
            // Delete the temporary file.
            @unlink($this->_tmp_filename);
        } else {
            @fclose($this->_FILEH_);
        }

        return true;
    }

    /**
    * Calculate some numbers
    *
    * @access private
    * @param array $raList Reference to an array of PPS's
    * @return array The array of numbers
    */
    function _calcSize(&$raList) 
    {
        // Calculate Basic Setting
        list($iSBDcnt, $iBBcnt, $iPPScnt) = array(0,0,0);
        $iSmallLen = 0;
        $iSBcnt = 0;
        for ($i = 0; $i < count($raList); $i++) {
            if ($raList[$i]->Type == OLE_PPS_TYPE_FILE) {
                $raList[$i]->Size = $raList[$i]->_DataLen();
                if ($raList[$i]->Size < OLE_DATA_SIZE_SMALL) {
                    $iSBcnt += floor($raList[$i]->Size / $this->_SMALL_BLOCK_SIZE)
                                  + (($raList[$i]->Size % $this->_SMALL_BLOCK_SIZE)? 1: 0);
                } else {
                    $iBBcnt += (floor($raList[$i]->Size / $this->_BIG_BLOCK_SIZE) +
                        (($raList[$i]->Size % $this->_BIG_BLOCK_SIZE)? 1: 0));
                }
            }
        }
        $iSmallLen = $iSBcnt * $this->_SMALL_BLOCK_SIZE;
        $iSlCnt = floor($this->_BIG_BLOCK_SIZE / OLE_LONG_INT_SIZE);
        $iSBDcnt = floor($iSBcnt / $iSlCnt) + (($iSBcnt % $iSlCnt)? 1:0);
        $iBBcnt +=  (floor($iSmallLen / $this->_BIG_BLOCK_SIZE) +
                      (( $iSmallLen % $this->_BIG_BLOCK_SIZE)? 1: 0));
        $iCnt = count($raList);
        $iBdCnt = $this->_BIG_BLOCK_SIZE / OLE_PPS_SIZE;
        $iPPScnt = (floor($iCnt/$iBdCnt) + (($iCnt % $iBdCnt)? 1: 0));
   
        return array($iSBDcnt, $iBBcnt, $iPPScnt);
    }

    /**
    * Helper function for caculating a magic value for block sizes
    *
    * @access private
    * @param integer $i2 The argument
    * @see save()
    * @return integer
    */
    function _adjust2($i2)
    {
        $iWk = log($i2)/log(2);
        return ($iWk > floor($iWk))? floor($iWk)+1:$iWk;
    }

    /**
    * Save OLE header
    *
    * @access private
    * @param integer $iSBDcnt
    * @param integer $iBBcnt
    * @param integer $iPPScnt
    */
    function _saveHeader($iSBDcnt, $iBBcnt, $iPPScnt)
    {
        $FILE = $this->_FILEH_;
  
        // Calculate Basic Setting
        $iBlCnt = $this->_BIG_BLOCK_SIZE / OLE_LONG_INT_SIZE;
        $i1stBdL = ($this->_BIG_BLOCK_SIZE - 0x4C) / OLE_LONG_INT_SIZE;
  
        $iBdExL = 0;
        $iAll = $iBBcnt + $iPPScnt + $iSBDcnt;
        $iAllW = $iAll;
        $iBdCntW = floor($iAllW / $iBlCnt) + (($iAllW % $iBlCnt)? 1: 0);
        $iBdCnt = floor(($iAll + $iBdCntW) / $iBlCnt) + ((($iAllW+$iBdCntW) % $iBlCnt)? 1: 0);
  
        // Calculate BD count
        if ($iBdCnt > $i1stBdL) {
            while (1) {
                $iBdExL++;
                $iAllW++;
                $iBdCntW = floor($iAllW / $iBlCnt) + (($iAllW % $iBlCnt)? 1: 0);
                $iBdCnt = floor(($iAllW + $iBdCntW) / $iBlCnt) + ((($iAllW+$iBdCntW) % $iBlCnt)? 1: 0);
                if ($iBdCnt <= ($iBdExL*$iBlCnt+ $i1stBdL)) {
                    break;
                }
            }
        }
  
        // Save Header
        fwrite($FILE,
                  "\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1"
                  . "\x00\x00\x00\x00"
                  . "\x00\x00\x00\x00"
                  . "\x00\x00\x00\x00"
                  . "\x00\x00\x00\x00"
                  . pack("v", 0x3b)
                  . pack("v", 0x03)
                  . pack("v", -2)
                  . pack("v", 9)
                  . pack("v", 6)
                  . pack("v", 0)
                  . "\x00\x00\x00\x00"
                  . "\x00\x00\x00\x00"
                  . pack("V", $iBdCnt) 
                  . pack("V", $iBBcnt+$iSBDcnt) //ROOT START
                  . pack("V", 0)