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chicpro
2014-03-20 14:51:51 +09:00
parent 41a3385e99
commit bcc013bdcf
80 changed files with 16733 additions and 14 deletions
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lib/Excel/php_writeexcel/class.writeexcel_biffwriter.inc.php Normal file
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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_biffwriter {
var $byte_order;
var $BIFF_version;
var $_byte_order;
var $_data;
var $_datasize;
var $_limit;
var $_debug;
/*
* Constructor
*/
function writeexcel_biffwriter() {
$this->byte_order = '';
$this->BIFF_version = 0x0500;
$this->_byte_order = '';
$this->_data = false;
$this->_datasize = 0;
$this->_limit = 2080;
$this->_set_byte_order();
}
/*
* Determine the byte order and store it as class data to avoid
* recalculating it for each call to new().
*/
function _set_byte_order() {
$this->byteorder=0;
// Check if "pack" gives the required IEEE 64bit float
$teststr = pack("d", 1.2345);
$number = pack("C8", 0x8D, 0x97, 0x6E, 0x12, 0x83, 0xC0, 0xF3, 0x3F);
if ($number == $teststr) {
$this->byte_order = 0; // Little Endian
} elseif ($number == strrev($teststr)) {
$this->byte_order = 1; // Big Endian
} else {
// Give up
trigger_error("Required floating point format not supported ".
"on this platform. See the portability section ".
"of the documentation.", E_USER_ERROR);
}
$this->_byte_order = $this->byte_order;
}
/*
* General storage function
*/
function _prepend($data) {
if (func_num_args()>1) {
trigger_error("writeexcel_biffwriter::_prepend() ".
"called with more than one argument", E_USER_ERROR);
}
if ($this->_debug) {
print "*** writeexcel_biffwriter::_prepend() called:";
for ($c=0;$c<strlen($data);$c++) {
if ($c%16==0) {
print "\n";
}
printf("%02X ", ord($data[$c]));
}
print "\n";
}
if (strlen($data) > $this->_limit) {
$data = $this->_add_continue($data);
}
$this->_data = $data . $this->_data;
$this->_datasize += strlen($data);
}
/*
* General storage function
*/
function _append($data) {
if (func_num_args()>1) {
trigger_error("writeexcel_biffwriter::_append() ".
"called with more than one argument", E_USER_ERROR);
}
if ($this->_debug) {
print "*** writeexcel_biffwriter::_append() called:";
for ($c=0;$c<strlen($data);$c++) {
if ($c%16==0) {
print "\n";
}
printf("%02X ", ord($data[$c]));
}
print "\n";
}
if (strlen($data) > $this->_limit) {
$data = $this->_add_continue($data);
}
$this->_data = $this->_data . $data;
$this->_datasize += strlen($data);
}
/*
* Writes Excel BOF record to indicate the beginning of a stream or
* sub-stream in the BIFF file.
*
* $type = 0x0005, Workbook
* $type = 0x0010, Worksheet
*/
function _store_bof($type) {
$record = 0x0809; // Record identifier
$length = 0x0008; // Number of bytes to follow
$version = $this->BIFF_version;
// According to the SDK $build and $year should be set to zero.
// However, this throws a warning in Excel 5. So, use these
// magic numbers.
$build = 0x096C;
$year = 0x07C9;
$header = pack("vv", $record, $length);
$data = pack("vvvv", $version, $type, $build, $year);
$this->_prepend($header . $data);
}
/*
* Writes Excel EOF record to indicate the end of a BIFF stream.
*/
function _store_eof() {
$record = 0x000A; // Record identifier
$length = 0x0000; // Number of bytes to follow
$header = pack("vv", $record, $length);
$this->_append($header);
}
/*
* Excel limits the size of BIFF records. In Excel 5 the limit is 2084
* bytes. In Excel 97 the limit is 8228 bytes. Records that are longer
* than these limits must be split up into CONTINUE blocks.
*
* This function take a long BIFF record and inserts CONTINUE records as
* necessary.
*/
function _add_continue($data) {
$limit = $this->_limit;
$record = 0x003C; // Record identifier
// The first 2080/8224 bytes remain intact. However, we have to change
// the length field of the record.
$tmp = substr($data, 0, $limit);
$data = substr($data, $limit);
$tmp = substr($tmp, 0, 2) . pack ("v", $limit-4) . substr($tmp, 4);
// Strip out chunks of 2080/8224 bytes +4 for the header.
while (strlen($data) > $limit) {
$header = pack("vv", $record, $limit);
$tmp .= $header;
$tmp .= substr($data, 0, $limit);
$data = substr($data, $limit);
}
// Mop up the last of the data
$header = pack("vv", $record, strlen($data));
$tmp .= $header;
$tmp .= $data;
return $tmp;
}
}
?>