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<?php
/*
* Copyleft 2002 Johann Hanne
*
* This 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 software 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 software; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place,
* Suite 330, Boston, MA 02111-1307 USA
*/
/*
* This is the Spreadsheet::WriteExcel Perl package ported to PHP
* Spreadsheet::WriteExcel was written by John McNamara, jmcnamara@cpan.org
*/
class writeexcel_olewriter {
var $_OLEfilename;
var $_OLEtmpfilename; /* ABR */
var $_filehandle;
var $_fileclosed;
var $_internal_fh;
var $_biff_only;
var $_size_allowed;
var $_biffsize;
var $_booksize;
var $_big_blocks;
var $_list_blocks;
var $_root_start;
var $_block_count;
/*
* Constructor
*/
function writeexcel_olewriter($filename) {
$this->_OLEfilename = $filename;
$this->_filehandle = false;
$this->_fileclosed = 0;
$this->_internal_fh = 0;
$this->_biff_only = 0;
$this->_size_allowed = 0;
$this->_biffsize = 0;
$this->_booksize = 0;
$this->_big_blocks = 0;
$this->_list_blocks = 0;
$this->_root_start = 0;
$this->_block_count = 4;
$this->_initialize();
}
/*
* Check for a valid filename and store the filehandle.
*/
function _initialize() {
$OLEfile = $this->_OLEfilename;
/* Check for a filename. Workbook.pm will catch this first. */
if ($OLEfile == '') {
trigger_error("Filename required", E_USER_ERROR);
}
/*
* If the filename is a resource it is assumed that it is a valid
* filehandle, if not we create a filehandle.
*/
if (is_resource($OLEfile)) {
$fh = $OLEfile;
} else {
// Create a new file, open for writing
$fh = fopen($OLEfile, "wb");
// The workbook class also checks this but something may have
// happened since then.
if (!$fh) {
trigger_error("Can't open $OLEfile. It may be in use or ".
"protected", E_USER_ERROR);
}
$this->_internal_fh = 1;
}
// Store filehandle
$this->_filehandle = $fh;
}
/*
* Set the size of the data to be written to the OLE stream
*
* $big_blocks = (109 depot block x (128 -1 marker word)
* - (1 x end words)) = 13842
* $maxsize = $big_blocks * 512 bytes = 7087104
*/
function set_size($size) {
$maxsize = 7087104;
if ($size > $maxsize) {
trigger_error("Maximum file size, $maxsize, exceeded. To create ".
"files bigger than this limit please use the ".
"workbookbig class.", E_USER_ERROR);
return ($this->_size_allowed = 0);
}
$this->_biffsize = $size;
// Set the min file size to 4k to avoid having to use small blocks
if ($size > 4096) {
$this->_booksize = $size;
} else {
$this->_booksize = 4096;
}
return ($this->_size_allowed = 1);
}
/*
* Calculate various sizes needed for the OLE stream
*/
function _calculate_sizes() {
$datasize = $this->_booksize;
if ($datasize % 512 == 0) {
$this->_big_blocks = $datasize/512;
} else {
$this->_big_blocks = floor($datasize/512)+1;
}
// There are 127 list blocks and 1 marker blocks for each big block
// depot + 1 end of chain block
$this->_list_blocks = floor(($this->_big_blocks)/127)+1;
$this->_root_start = $this->_big_blocks;
//print $this->_biffsize. "\n";
//print $this->_big_blocks. "\n";
//print $this->_list_blocks. "\n";
}
/*
* Write root entry, big block list and close the filehandle.
* This method must be called so that the file contents are
* actually written.
*/
function close() {
if (!$this->_size_allowed) {
return;
}
if (!$this->_biff_only) {
$this->_write_padding();
$this->_write_property_storage();
$this->_write_big_block_depot();
}
// Close the filehandle if it was created internally.
if ($this->_internal_fh) {
fclose($this->_filehandle);
}
/* ABR */
if ($this->_OLEtmpfilename != '') {
$fh = fopen($this->_OLEtmpfilename, "rb");
if ($fh == false) {
trigger_error("Can't read temporary file.", E_USER_ERROR);
}
fpassthru($fh);
fclose($fh);
unlink($this->_OLEtmpfilename);
};
$this->_fileclosed = 1;
}
/*
* Write BIFF data to OLE file.
*/
function write($data) {
fputs($this->_filehandle, $data);
}
/*
* Write OLE header block.
*/
function write_header() {
if ($this->_biff_only) {
return;
}
$this->_calculate_sizes();
$root_start = $this->_root_start;
$num_lists = $this->_list_blocks;
$id = pack("C8", 0xD0, 0xCF, 0x11, 0xE0,
0xA1, 0xB1, 0x1A, 0xE1);
$unknown1 = pack("VVVV", 0x00, 0x00, 0x00, 0x00);
$unknown2 = pack("vv", 0x3E, 0x03);
$unknown3 = pack("v", -2);
$unknown4 = pack("v", 0x09);
$unknown5 = pack("VVV", 0x06, 0x00, 0x00);
$num_bbd_blocks = pack("V", $num_lists);
$root_startblock = pack("V", $root_start);
$unknown6 = pack("VV", 0x00, 0x1000);
$sbd_startblock = pack("V", -2);
$unknown7 = pack("VVV", 0x00, -2 ,0x00);
$unused = pack("V", -1);
fputs($this->_filehandle, $id);
fputs($this->_filehandle, $unknown1);
fputs($this->_filehandle, $unknown2);
fputs($this->_filehandle, $unknown3);
fputs($this->_filehandle, $unknown4);
fputs($this->_filehandle, $unknown5);
fputs($this->_filehandle, $num_bbd_blocks);
fputs($this->_filehandle, $root_startblock);
fputs($this->_filehandle, $unknown6);
fputs($this->_filehandle, $sbd_startblock);
fputs($this->_filehandle, $unknown7);
for ($c=1;$c<=$num_lists;$c++) {
$root_start++;
fputs($this->_filehandle, pack("V", $root_start));
}
for ($c=$num_lists;$c<=108;$c++) {
fputs($this->_filehandle, $unused);
}
}
/*
* Write big block depot.
*/
function _write_big_block_depot() {
$num_blocks = $this->_big_blocks;
$num_lists = $this->_list_blocks;
$total_blocks = $num_lists * 128;
$used_blocks = $num_blocks + $num_lists + 2;
$marker = pack("V", -3);
$end_of_chain = pack("V", -2);
$unused = pack("V", -1);
for ($i=1;$i<=($num_blocks-1);$i++) {
fputs($this->_filehandle, pack("V", $i));
}
fputs($this->_filehandle, $end_of_chain);
fputs($this->_filehandle, $end_of_chain);
for ($c=1;$c<=$num_lists;$c++) {
fputs($this->_filehandle, $marker);
}
for ($c=$used_blocks;$c<=$total_blocks;$c++) {
fputs($this->_filehandle, $unused);
}
}
/*
* Write property storage. TODO: add summary sheets
*/
function _write_property_storage() {
$rootsize = -2;
$booksize = $this->_booksize;
// name type dir start size
$this->_write_pps('Root Entry', 0x05, 1, -2, 0x00);
$this->_write_pps('Book', 0x02, -1, 0x00, $booksize);
$this->_write_pps('', 0x00, -1, 0x00, 0x0000);
$this->_write_pps('', 0x00, -1, 0x00, 0x0000);
}
/*
* Write property sheet in property storage
*/
function _write_pps($name, $type, $dir, $start, $size) {
$names = array();
$length = 0;
if ($name != '') {
$name = $name . "\0";
// Simulate a Unicode string
$chars=preg_split("''", $name, -1, PREG_SPLIT_NO_EMPTY);
foreach ($chars as $char) {
array_push($names, ord($char));
}
$length = strlen($name) * 2;
}
$rawname = call_user_func_array('pack', array_merge(array("v*"), $names));
$zero = pack("C", 0);
$pps_sizeofname = pack("v", $length); //0x40
$pps_type = pack("v", $type); //0x42
$pps_prev = pack("V", -1); //0x44
$pps_next = pack("V", -1); //0x48
$pps_dir = pack("V", $dir); //0x4c
$unknown1 = pack("V", 0);
$pps_ts1s = pack("V", 0); //0x64
$pps_ts1d = pack("V", 0); //0x68
$pps_ts2s = pack("V", 0); //0x6c
$pps_ts2d = pack("V", 0); //0x70
$pps_sb = pack("V", $start); //0x74
$pps_size = pack("V", $size); //0x78
fputs($this->_filehandle, $rawname);
fputs($this->_filehandle, str_repeat($zero, (64-$length)));
fputs($this->_filehandle, $pps_sizeofname);
fputs($this->_filehandle, $pps_type);
fputs($this->_filehandle, $pps_prev);
fputs($this->_filehandle, $pps_next);
fputs($this->_filehandle, $pps_dir);
fputs($this->_filehandle, str_repeat($unknown1, 5));
fputs($this->_filehandle, $pps_ts1s);
fputs($this->_filehandle, $pps_ts1d);
fputs($this->_filehandle, $pps_ts2d);
fputs($this->_filehandle, $pps_ts2d);
fputs($this->_filehandle, $pps_sb);
fputs($this->_filehandle, $pps_size);
fputs($this->_filehandle, $unknown1);
}
/*
* Pad the end of the file
*/
function _write_padding() {
$biffsize = $this->_biffsize;
if ($biffsize < 4096) {
$min_size = 4096;
} else {
$min_size = 512;
}
if ($biffsize % $min_size != 0) {
$padding = $min_size - ($biffsize % $min_size);
fputs($this->_filehandle, str_repeat("\0", $padding));
}
}
}
?>
|