/**
* Gets information about all PPS's on the OLE container from the PPS WK's
* creates an OLE_PPS object for each one.
*
* @access private
* @param integer $pps_wk_start Position inside the OLE file where PPS WK's start
* @param integer $big_block_size Size of big blobks in the OLE file
* @return mixed true on success, PEAR_Error on failure
*/
function _readPpsWks($pps_wk_start, $big_block_size)
{
$pointer = ($pps_wk_start + 1) * $big_block_size;
while (1)
{
fseek($this->_file_handle, $pointer);
$pps_wk = fread($this->_file_handle, OLE_PPS_SIZE);
if (strlen($pps_wk) != OLE_PPS_SIZE) {
break; // Excel likes to add a trailing byte sometimes
//return $this->raiseError("PPS at $pointer seems too short: ".strlen($pps_wk));
}
$name_length = unpack("c", substr($pps_wk, 64, 2)); // FIXME (2 bytes??)
$name_length = $name_length[''] - 2;
$name = substr($pps_wk, 0, $name_length);
$type = unpack("c", substr($pps_wk, 66, 1));
if (($type[''] != OLE_PPS_TYPE_ROOT) and
($type[''] != OLE_PPS_TYPE_DIR) and
($type[''] != OLE_PPS_TYPE_FILE))
{
return $this->raiseError("PPS at $pointer has unknown type: {$type['']}");
}
$prev = unpack("V", substr($pps_wk, 68, 4));
$next = unpack("V", substr($pps_wk, 72, 4));
$dir = unpack("V", substr($pps_wk, 76, 4));
// there is no magic number, it can take different values.
//$magic = unpack("V", strrev(substr($pps_wk, 92, 4)));
$time_1st = substr($pps_wk, 100, 8);
$time_2nd = substr($pps_wk, 108, 8);
$start_block = unpack("V", substr($pps_wk, 116, 4));
$size = unpack("V", substr($pps_wk, 120, 4));
// _data member will point to position in file!!
// OLE_PPS object is created with an empty children array!!
$this->_list[] = new OLE_PPS(null, '', $type[''], $prev[''], $next[''],
$dir[''], OLE::OLE2LocalDate($time_1st),
OLE::OLE2LocalDate($time_2nd),
($start_block[''] + 1) * $big_block_size, array());
// give it a size
$this->_list[count($this->_list) - 1]->Size = $size[''];
// check if the PPS tree (starting from root) is complete
if ($this->_ppsTreeComplete(0)) {
break;
}
$pointer += OLE_PPS_SIZE;
}
}
/**
* Gets information about all PPS's on the OLE container from the PPS WK's
* creates an OLE_PPS object for each one.
*
* @access private
* @param integer $blockId the block id of the first block
* @return mixed true on success, PEAR_Error on failure
*/
function _readPpsWks($blockId)
{
global $FANNIE_ROOT;
$fh = $this->getStream($blockId);
for ($pos = 0;; $pos += 128) {
fseek($fh, $pos, SEEK_SET);
$nameUtf16 = fread($fh, 64);
$nameLength = $this->_readInt2($fh);
$nameUtf16 = substr($nameUtf16, 0, $nameLength - 2);
// Simple conversion from UTF-16LE to ISO-8859-1
$name = str_replace("", "", $nameUtf16);
$type = $this->_readInt1($fh);
switch ($type) {
case OLE_PPS_TYPE_ROOT:
require_once dirname(__FILE__) . '/PPS/Root.php';
$pps = new OLE_PPS_Root(null, null, array());
$this->root = $pps;
break;
case OLE_PPS_TYPE_DIR:
$pps = new OLE_PPS(null, null, null, null, null, null, null, null, null, array());
break;
case OLE_PPS_TYPE_FILE:
require_once dirname(__FILE__) . '/PPS/File.php';
$pps = new OLE_PPS_File($name);
break;
default:
continue;
}
fseek($fh, 1, SEEK_CUR);
$pps->Type = $type;
$pps->Name = $name;
$pps->PrevPps = $this->_readInt4($fh);
$pps->NextPps = $this->_readInt4($fh);
$pps->DirPps = $this->_readInt4($fh);
fseek($fh, 20, SEEK_CUR);
$pps->Time1st = OLE::OLE2LocalDate(fread($fh, 8));
$pps->Time2nd = OLE::OLE2LocalDate(fread($fh, 8));
$pps->_StartBlock = $this->_readInt4($fh);
$pps->Size = $this->_readInt4($fh);
$pps->No = count($this->_list);
$this->_list[] = $pps;
// check if the PPS tree (starting from root) is complete
if (isset($this->root) && $this->_ppsTreeComplete($this->root->No)) {
break;
}
}
fclose($fh);
// Initialize $pps->children on directories
foreach ($this->_list as $pps) {
if ($pps->Type == OLE_PPS_TYPE_DIR || $pps->Type == OLE_PPS_TYPE_ROOT) {
$nos = array($pps->DirPps);
$pps->children = array();
while ($nos) {
$no = array_pop($nos);
if ($no != -1) {
$childPps = $this->_list[$no];
$nos[] = $childPps->PrevPps;
$nos[] = $childPps->NextPps;
$pps->children[] = $childPps;
}
}
}
}
return true;
}
