forked from extern/egroupware
285 lines
8.6 KiB
PHP
285 lines
8.6 KiB
PHP
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<?php
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/**************************************************************************\
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* eGroupWare API - Palm Database Access *
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* This file written by Miles Lott <milos@groupwhere.org> *
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* Access to palm OS database structures (?) *
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* ------------------------------------------------------------------------ *
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* Portions of code from ToPTIP *
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* Copyright (C) 2000-2001 Pierre Dittgen *
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* This file is a translation of the txt2pdbdoc tool *
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* written in C Paul J. Lucas (plj@best.com) *
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* ------------------------------------------------------------------------ *
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* This library may be part of the eGroupWare API *
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* ------------------------------------------------------------------------ *
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* This library is free software; you can redistribute it and/or modify it *
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* under the terms of the GNU Lesser General Public License as published by *
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* the Free Software Foundation; either version 2.1 of the License, *
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* or any later version. *
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* This library is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
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* See the GNU Lesser General Public License for more details. *
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* You should have received a copy of the GNU Lesser General Public License *
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* along with this library; if not, write to the Free Software Foundation, *
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
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\**************************************************************************/
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/* $Id$ */
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// ONLY THE FETCH FUNCTION SHOULD BE CALLED AT THIS TIME:
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// $pdb = CreateObject('addressbook.pdb');
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// $pdb->fetch($content, $title, $document);
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//
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// This will force a download of the pdb file.
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//
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// READ DOES NOT WORK
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// FORMAT OF FILE IS A DOC, NOT A TRUE PALM ADDRESS BOOK
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class pdb
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{
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var $record_size = 4096; // Size of text record
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var $pdb_header_size = 78; // Size of the file header (don't touch!)
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var $pdb_record_header_size = 8; // Size of a text record header (don't touch either!)
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/**
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* Convert a integer value to a two bytes value string
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*/
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function int2($value)
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{
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return sprintf("%c%c", $value / 256, $value % 256);
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}
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/**
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* Convert a integer value to a four bytes value string
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*/
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function int4($value)
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{
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for($i=0; $i<4; $i++)
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{
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$b[$i] = $value % 256;
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$value = (int)(($value - $b[$i]) / 256);
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}
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return sprintf("%c%c%c%c", $b[3], $b[2], $b[1], $b[0]);
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}
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/**
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* Writes the header of the pdb file containing the title of the document
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* and different parameters including its size
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*/
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function write_header($fd, $title, $content_length)
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{
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// ============ File header =========================================
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// Title of the document, it's limited to 31 characters
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if(strlen($title) > 31)
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{
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$title = substr($title, 0, 31);
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}
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fwrite($fd, $title);
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// Completion with null '\0' characters
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for($i=0; $i<32-strlen($title); $i++)
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{
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fwrite($fd, sprintf("%c", 0), 1);
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}
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// attributes & version fields
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fwrite($fd, $this->int2(0));
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fwrite($fd, $this->int2(0));
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// create & modify time
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fwrite($fd, sprintf("%c%c%c%c", 6, 209, 68, 174), 4);
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fwrite($fd, sprintf("%c%c%c%c", 6, 209, 68, 174), 4);
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// backup time, modification number, app Info Id, sort info Id
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fwrite($fd, $this->int4(0));
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fwrite($fd, $this->int4(0));
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fwrite($fd, $this->int4(0));
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fwrite($fd, $this->int4(0));
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// Type & creator
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fwrite($fd, 'TEXt', 4);
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fwrite($fd, 'REAd', 4);
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// Id seed & next record list
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fwrite($fd, $this->int4(0));
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fwrite($fd, $this->int4(0));
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// Number of text records
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$full_tr = (int)($content_length / $this->record_size);
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$notfull_tr = $content_length % $this->record_size;
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$num_records = $full_tr;
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if($notfull_tr != 0)
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{
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$num_records++;
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}
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// + 1 cause of record 0
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fwrite($fd, $this->int2($num_records + 1));
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// From here...
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$num_offsets = $num_records + 1;
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$offset = $this->pdb_header_size + $this->pdb_record_header_size * $num_offsets;
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$index = 0x40 << 24 | 0x6F8000; // Why not!
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fwrite($fd, $this->int4($offset));
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fwrite($fd, $this->int4($index++));
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$val = 110 + ($num_offsets - 2) * 8;
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while(--$num_offsets != 0)
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{
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fwrite($fd, $this->int4($val));
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$val += 4096;
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fwrite($fd, $this->int4($index++));
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}
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// To here
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// Don't ask me how it works ;-)
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// ====== Write record 0 ============
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fwrite($fd, $this->int2(1)); // Version
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fwrite($fd, $this->int2(0)); // Reserved1
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fwrite($fd, $this->int4($content_length)); // doc size
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fwrite($fd, $this->int2($num_records)); // num records
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fwrite($fd, $this->int2($this->record_size)); // record size
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fwrite($fd, $this->int4(0)); // Reserved2
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}
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/**
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* Writes the given text, title on the given file descriptor
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* Note: It's saved as uncompressed doc
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* Note2: File descriptor is not closed at the end of the function
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*/
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function write($fd, $content, $title)
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{
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// Write header
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$this->write_header($fd, $title, strlen($content));
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// Write content
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fwrite($fd, $content);
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// And flushes all
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fflush($fd);
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}
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/**
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* Reads the header of the pdb file
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* and different parameters including its size
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*/
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function read_header($fd)
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{
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// ============ File header =========================================
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// Title of the document, it's limited to 31 characters
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$title = fread(31,$fd);
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// Completion with null '\0' characters
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for($i=0; $i<32-strlen($title); $i++)
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{
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fwrite($fd, sprintf("%c", 0), 1);
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}
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// attributes & version fields
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fwrite($fd, $this->int2(0));
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fwrite($fd, $this->int2(0));
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// create & modify time
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fwrite($fd, sprintf("%c%c%c%c", 6, 209, 68, 174), 4);
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fwrite($fd, sprintf("%c%c%c%c", 6, 209, 68, 174), 4);
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// backup time, modification number, app Info Id, sort info Id
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fwrite($fd, $this->int4(0));
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fwrite($fd, $this->int4(0));
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fwrite($fd, $this->int4(0));
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fwrite($fd, $this->int4(0));
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// Type & creator
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fwrite($fd, 'TEXt', 4);
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fwrite($fd, 'REAd', 4);
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// Id seed & next record list
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fwrite($fd, $this->int4(0));
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fwrite($fd, $this->int4(0));
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// Number of text records
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$full_tr = (int)($content_length / $this->record_size);
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$notfull_tr = $content_length % $this->record_size;
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$num_records = $full_tr;
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if($notfull_tr != 0)
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{
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$num_records++;
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}
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// + 1 cause of record 0
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fwrite($fd, $this->int2($num_records + 1));
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// From here...
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$num_offsets = $num_records + 1;
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$offset = $this->pdb_header_size + $this->pdb_record_header_size * $num_offsets;
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$index = 0x40 << 24 | 0x6F8000; // Why not!
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fwrite($fd, $this->int4($offset));
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fwrite($fd, $this->int4($index++));
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$val = 110 + ($num_offsets - 2) * 8;
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while(--$num_offsets != 0)
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{
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fwrite($fd, $this->int4($val));
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$val += 4096;
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fwrite($fd, $this->int4($index++));
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}
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// To here
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// Don't ask me how it works ;-)
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// ====== Write record 0 ============
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fwrite($fd, $this->int2(1)); // Version
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fwrite($fd, $this->int2(0)); // Reserved1
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fwrite($fd, $this->int4($content_length)); // doc size
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fwrite($fd, $this->int2($num_records)); // num records
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fwrite($fd, $this->int2($this->record_size)); // record size
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fwrite($fd, $this->int4(0)); // Reserved2
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}
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/**
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* Reads a pdb from the given file descriptor
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* Note2: File descriptor is not closed at the end of the function
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*/
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function read($fd)
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{
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// Read header
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$header = $this->read_header($fd);
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// Read content
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$content = fread($fd);
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// And flushes all
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flush($fd);
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}
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/**
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* Creates a palmdoc and force the user to download it
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*/
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function fetch($content, $title, $document)
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{
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// Creates a temp file to put the current doc
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$tempfile = tempnam(".", "palm");
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// Creates the doc from the content
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$fd = fopen($tempfile, 'w');
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$this->write($fd, $content, $title);
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fclose($fd);
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// Forces the download
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header("Content-Type: application/force-download");
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header("Content-Disposition: attachment; filename=\"$document\"");
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// And writes the file content on stdout
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$fd = fopen("$tempfile", 'r');
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$content = fread($fd, filesize($tempfile));
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fclose($fd);
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print($content);
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// Cleaning
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unlink($tempfile);
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exit;
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}
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}
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?>
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