<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at http://getid3.sourceforge.net                 //
//            or http://www.getid3.org                         //
//          also https://github.com/JamesHeinrich/getID3       //
/////////////////////////////////////////////////////////////////
// See readme.txt for more details                             //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.misc.iso.php                                         //
// module for analyzing ISO files                              //
// dependencies: NONE                                          //
//                                                            ///
/////////////////////////////////////////////////////////////////


class getid3_iso extends getid3_handler
{

    public function 
Analyze() {
        
$info = &$this->getid3->info;

        
$info['fileformat'] = 'iso';

        for (
$i 16$i <= 19$i++) {
            
$this->fseek(2048 $i);
            
$ISOheader $this->fread(2048);
            if (
substr($ISOheader15) == 'CD001') {
                switch (
ord($ISOheader{0})) {
                    case 
1:
                        
$info['iso']['primary_volume_descriptor']['offset'] = 2048 $i;
                        
$this->ParsePrimaryVolumeDescriptor($ISOheader);
                        break;

                    case 
2:
                        
$info['iso']['supplementary_volume_descriptor']['offset'] = 2048 $i;
                        
$this->ParseSupplementaryVolumeDescriptor($ISOheader);
                        break;

                    default:
                        
// skip
                        
break;
                }
            }
        }

        
$this->ParsePathTable();

        
$info['iso']['files'] = array();
        foreach (
$info['iso']['path_table']['directories'] as $directorynum => $directorydata) {
            
$info['iso']['directories'][$directorynum] = $this->ParseDirectoryRecord($directorydata);
        }

        return 
true;
    }


    public function 
ParsePrimaryVolumeDescriptor(&$ISOheader) {
        
// ISO integer values are stored *BOTH* Little-Endian AND Big-Endian format!!
        // ie 12345 == 0x3039  is stored as $39 $30 $30 $39 in a 4-byte field

        // shortcuts
        
$info = &$this->getid3->info;
        
$info['iso']['primary_volume_descriptor']['raw'] = array();
        
$thisfile_iso_primaryVD     = &$info['iso']['primary_volume_descriptor'];
        
$thisfile_iso_primaryVD_raw = &$thisfile_iso_primaryVD['raw'];

        
$thisfile_iso_primaryVD_raw['volume_descriptor_type']         = getid3_lib::LittleEndian2Int(substr($ISOheader,    01));
        
$thisfile_iso_primaryVD_raw['standard_identifier']            =                  substr($ISOheader,    15);
        if (
$thisfile_iso_primaryVD_raw['standard_identifier'] != 'CD001') {
            
$info['error'][] = 'Expected "CD001" at offset ('.($thisfile_iso_primaryVD['offset'] + 1).'), found "'.$thisfile_iso_primaryVD_raw['standard_identifier'].'" instead';
            unset(
$info['fileformat']);
            unset(
$info['iso']);
            return 
false;
        }


        
$thisfile_iso_primaryVD_raw['volume_descriptor_version']     = getid3_lib::LittleEndian2Int(substr($ISOheader,    61));
        
//$thisfile_iso_primaryVD_raw['unused_1']                      =                              substr($ISOheader,    7, 1);
        
$thisfile_iso_primaryVD_raw['system_identifier']             =                              substr($ISOheader,    832);
        
$thisfile_iso_primaryVD_raw['volume_identifier']             =                              substr($ISOheader,   4032);
        
//$thisfile_iso_primaryVD_raw['unused_2']                      =                              substr($ISOheader,   72, 8);
        
$thisfile_iso_primaryVD_raw['volume_space_size']             = getid3_lib::LittleEndian2Int(substr($ISOheader,   804));
        
//$thisfile_iso_primaryVD_raw['unused_3']                      =                              substr($ISOheader,   88, 32);
        
$thisfile_iso_primaryVD_raw['volume_set_size']               = getid3_lib::LittleEndian2Int(substr($ISOheader,  1202));
        
$thisfile_iso_primaryVD_raw['volume_sequence_number']        = getid3_lib::LittleEndian2Int(substr($ISOheader,  1242));
        
$thisfile_iso_primaryVD_raw['logical_block_size']            = getid3_lib::LittleEndian2Int(substr($ISOheader,  1282));
        
$thisfile_iso_primaryVD_raw['path_table_size']               = getid3_lib::LittleEndian2Int(substr($ISOheader,  1324));
        
$thisfile_iso_primaryVD_raw['path_table_l_location']         = getid3_lib::LittleEndian2Int(substr($ISOheader,  1402));
        
$thisfile_iso_primaryVD_raw['path_table_l_opt_location']     = getid3_lib::LittleEndian2Int(substr($ISOheader,  1442));
        
$thisfile_iso_primaryVD_raw['path_table_m_location']         = getid3_lib::LittleEndian2Int(substr($ISOheader,  1482));
        
$thisfile_iso_primaryVD_raw['path_table_m_opt_location']     = getid3_lib::LittleEndian2Int(substr($ISOheader,  1522));
        
$thisfile_iso_primaryVD_raw['root_directory_record']         =                              substr($ISOheader,  15634);
        
$thisfile_iso_primaryVD_raw['volume_set_identifier']         =                              substr($ISOheader,  190128);
        
$thisfile_iso_primaryVD_raw['publisher_identifier']          =                              substr($ISOheader,  318128);
        
$thisfile_iso_primaryVD_raw['data_preparer_identifier']      =                              substr($ISOheader,  446128);
        
$thisfile_iso_primaryVD_raw['application_identifier']        =                              substr($ISOheader,  574128);
        
$thisfile_iso_primaryVD_raw['copyright_file_identifier']     =                              substr($ISOheader,  70237);
        
$thisfile_iso_primaryVD_raw['abstract_file_identifier']      =                              substr($ISOheader,  73937);
        
$thisfile_iso_primaryVD_raw['bibliographic_file_identifier'] =                              substr($ISOheader,  77637);
        
$thisfile_iso_primaryVD_raw['volume_creation_date_time']     =                              substr($ISOheader,  81317);
        
$thisfile_iso_primaryVD_raw['volume_modification_date_time'] =                              substr($ISOheader,  83017);
        
$thisfile_iso_primaryVD_raw['volume_expiration_date_time']   =                              substr($ISOheader,  84717);
        
$thisfile_iso_primaryVD_raw['volume_effective_date_time']    =                              substr($ISOheader,  86417);
        
$thisfile_iso_primaryVD_raw['file_structure_version']        = getid3_lib::LittleEndian2Int(substr($ISOheader,  8811));
        
//$thisfile_iso_primaryVD_raw['unused_4']                      = getid3_lib::LittleEndian2Int(substr($ISOheader,  882, 1));
        
$thisfile_iso_primaryVD_raw['application_data']              =                              substr($ISOheader,  883512);
        
//$thisfile_iso_primaryVD_raw['unused_5']                      =                              substr($ISOheader, 1395, 653);

        
$thisfile_iso_primaryVD['system_identifier']             = trim($thisfile_iso_primaryVD_raw['system_identifier']);
        
$thisfile_iso_primaryVD['volume_identifier']             = trim($thisfile_iso_primaryVD_raw['volume_identifier']);
        
$thisfile_iso_primaryVD['volume_set_identifier']         = trim($thisfile_iso_primaryVD_raw['volume_set_identifier']);
        
$thisfile_iso_primaryVD['publisher_identifier']          = trim($thisfile_iso_primaryVD_raw['publisher_identifier']);
        
$thisfile_iso_primaryVD['data_preparer_identifier']      = trim($thisfile_iso_primaryVD_raw['data_preparer_identifier']);
        
$thisfile_iso_primaryVD['application_identifier']        = trim($thisfile_iso_primaryVD_raw['application_identifier']);
        
$thisfile_iso_primaryVD['copyright_file_identifier']     = trim($thisfile_iso_primaryVD_raw['copyright_file_identifier']);
        
$thisfile_iso_primaryVD['abstract_file_identifier']      = trim($thisfile_iso_primaryVD_raw['abstract_file_identifier']);
        
$thisfile_iso_primaryVD['bibliographic_file_identifier'] = trim($thisfile_iso_primaryVD_raw['bibliographic_file_identifier']);
        
$thisfile_iso_primaryVD['volume_creation_date_time']     = $this->ISOtimeText2UNIXtime($thisfile_iso_primaryVD_raw['volume_creation_date_time']);
        
$thisfile_iso_primaryVD['volume_modification_date_time'] = $this->ISOtimeText2UNIXtime($thisfile_iso_primaryVD_raw['volume_modification_date_time']);
        
$thisfile_iso_primaryVD['volume_expiration_date_time']   = $this->ISOtimeText2UNIXtime($thisfile_iso_primaryVD_raw['volume_expiration_date_time']);
        
$thisfile_iso_primaryVD['volume_effective_date_time']    = $this->ISOtimeText2UNIXtime($thisfile_iso_primaryVD_raw['volume_effective_date_time']);

        if ((
$thisfile_iso_primaryVD_raw['volume_space_size'] * 2048) > $info['filesize']) {
            
$info['error'][] = 'Volume Space Size ('.($thisfile_iso_primaryVD_raw['volume_space_size'] * 2048).' bytes) is larger than the file size ('.$info['filesize'].' bytes) (truncated file?)';
        }

        return 
true;
    }


    public function 
ParseSupplementaryVolumeDescriptor(&$ISOheader) {
        
// ISO integer values are stored Both-Endian format!!
        // ie 12345 == 0x3039  is stored as $39 $30 $30 $39 in a 4-byte field

        // shortcuts
        
$info = &$this->getid3->info;
        
$info['iso']['supplementary_volume_descriptor']['raw'] = array();
        
$thisfile_iso_supplementaryVD     = &$info['iso']['supplementary_volume_descriptor'];
        
$thisfile_iso_supplementaryVD_raw = &$thisfile_iso_supplementaryVD['raw'];

        
$thisfile_iso_supplementaryVD_raw['volume_descriptor_type'] = getid3_lib::LittleEndian2Int(substr($ISOheader,    01));
        
$thisfile_iso_supplementaryVD_raw['standard_identifier']    =                  substr($ISOheader,    15);
        if (
$thisfile_iso_supplementaryVD_raw['standard_identifier'] != 'CD001') {
            
$info['error'][] = 'Expected "CD001" at offset ('.($thisfile_iso_supplementaryVD['offset'] + 1).'), found "'.$thisfile_iso_supplementaryVD_raw['standard_identifier'].'" instead';
            unset(
$info['fileformat']);
            unset(
$info['iso']);
            return 
false;
        }

        
$thisfile_iso_supplementaryVD_raw['volume_descriptor_version'] = getid3_lib::LittleEndian2Int(substr($ISOheader,    61));
        
//$thisfile_iso_supplementaryVD_raw['unused_1']                  =                              substr($ISOheader,    7, 1);
        
$thisfile_iso_supplementaryVD_raw['system_identifier']         =                              substr($ISOheader,    832);
        
$thisfile_iso_supplementaryVD_raw['volume_identifier']         =                              substr($ISOheader,   4032);
        
//$thisfile_iso_supplementaryVD_raw['unused_2']                  =                              substr($ISOheader,   72, 8);
        
$thisfile_iso_supplementaryVD_raw['volume_space_size']         = getid3_lib::LittleEndian2Int(substr($ISOheader,   804));
        if (
$thisfile_iso_supplementaryVD_raw['volume_space_size'] == 0) {
            
// Supplementary Volume Descriptor not used
            //unset($thisfile_iso_supplementaryVD);
            //return false;
        
}

        
//$thisfile_iso_supplementaryVD_raw['unused_3']                       =                              substr($ISOheader,   88, 32);
        
$thisfile_iso_supplementaryVD_raw['volume_set_size']                = getid3_lib::LittleEndian2Int(substr($ISOheader,  1202));
        
$thisfile_iso_supplementaryVD_raw['volume_sequence_number']         = getid3_lib::LittleEndian2Int(substr($ISOheader,  1242));
        
$thisfile_iso_supplementaryVD_raw['logical_block_size']             = getid3_lib::LittleEndian2Int(substr($ISOheader,  1282));
        
$thisfile_iso_supplementaryVD_raw['path_table_size']                = getid3_lib::LittleEndian2Int(substr($ISOheader,  1324));
        
$thisfile_iso_supplementaryVD_raw['path_table_l_location']          = getid3_lib::LittleEndian2Int(substr($ISOheader,  1402));
        
$thisfile_iso_supplementaryVD_raw['path_table_l_opt_location']      = getid3_lib::LittleEndian2Int(substr($ISOheader,  1442));
        
$thisfile_iso_supplementaryVD_raw['path_table_m_location']          = getid3_lib::LittleEndian2Int(substr($ISOheader,  1482));
        
$thisfile_iso_supplementaryVD_raw['path_table_m_opt_location']      = getid3_lib::LittleEndian2Int(substr($ISOheader,  1522));
        
$thisfile_iso_supplementaryVD_raw['root_directory_record']          =                              substr($ISOheader,  15634);
        
$thisfile_iso_supplementaryVD_raw['volume_set_identifier']          =                              substr($ISOheader,  190128);
        
$thisfile_iso_supplementaryVD_raw['publisher_identifier']           =                              substr($ISOheader,  318128);
        
$thisfile_iso_supplementaryVD_raw['data_preparer_identifier']       =                              substr($ISOheader,  446128);
        
$thisfile_iso_supplementaryVD_raw['application_identifier']         =                              substr($ISOheader,  574128);
        
$thisfile_iso_supplementaryVD_raw['copyright_file_identifier']      =                              substr($ISOheader,  70237);
        
$thisfile_iso_supplementaryVD_raw['abstract_file_identifier']       =                              substr($ISOheader,  73937);
        
$thisfile_iso_supplementaryVD_raw['bibliographic_file_identifier']  =                              substr($ISOheader,  77637);
        
$thisfile_iso_supplementaryVD_raw['volume_creation_date_time']      =                              substr($ISOheader,  81317);
        
$thisfile_iso_supplementaryVD_raw['volume_modification_date_time']  =                              substr($ISOheader,  83017);
        
$thisfile_iso_supplementaryVD_raw['volume_expiration_date_time']    =                              substr($ISOheader,  84717);
        
$thisfile_iso_supplementaryVD_raw['volume_effective_date_time']     =                              substr($ISOheader,  86417);
        
$thisfile_iso_supplementaryVD_raw['file_structure_version']         = getid3_lib::LittleEndian2Int(substr($ISOheader,  8811));
        
//$thisfile_iso_supplementaryVD_raw['unused_4']                       = getid3_lib::LittleEndian2Int(substr($ISOheader,  882, 1));
        
$thisfile_iso_supplementaryVD_raw['application_data']               =                              substr($ISOheader,  883512);
        
//$thisfile_iso_supplementaryVD_raw['unused_5']                       =                              substr($ISOheader, 1395, 653);

        
$thisfile_iso_supplementaryVD['system_identifier']              = trim($thisfile_iso_supplementaryVD_raw['system_identifier']);
        
$thisfile_iso_supplementaryVD['volume_identifier']              = trim($thisfile_iso_supplementaryVD_raw['volume_identifier']);
        
$thisfile_iso_supplementaryVD['volume_set_identifier']          = trim($thisfile_iso_supplementaryVD_raw['volume_set_identifier']);
        
$thisfile_iso_supplementaryVD['publisher_identifier']           = trim($thisfile_iso_supplementaryVD_raw['publisher_identifier']);
        
$thisfile_iso_supplementaryVD['data_preparer_identifier']       = trim($thisfile_iso_supplementaryVD_raw['data_preparer_identifier']);
        
$thisfile_iso_supplementaryVD['application_identifier']         = trim($thisfile_iso_supplementaryVD_raw['application_identifier']);
        
$thisfile_iso_supplementaryVD['copyright_file_identifier']      = trim($thisfile_iso_supplementaryVD_raw['copyright_file_identifier']);
        
$thisfile_iso_supplementaryVD['abstract_file_identifier']       = trim($thisfile_iso_supplementaryVD_raw['abstract_file_identifier']);
        
$thisfile_iso_supplementaryVD['bibliographic_file_identifier']  = trim($thisfile_iso_supplementaryVD_raw['bibliographic_file_identifier']);
        
$thisfile_iso_supplementaryVD['volume_creation_date_time']      = $this->ISOtimeText2UNIXtime($thisfile_iso_supplementaryVD_raw['volume_creation_date_time']);
        
$thisfile_iso_supplementaryVD['volume_modification_date_time']  = $this->ISOtimeText2UNIXtime($thisfile_iso_supplementaryVD_raw['volume_modification_date_time']);
        
$thisfile_iso_supplementaryVD['volume_expiration_date_time']    = $this->ISOtimeText2UNIXtime($thisfile_iso_supplementaryVD_raw['volume_expiration_date_time']);
        
$thisfile_iso_supplementaryVD['volume_effective_date_time']     = $this->ISOtimeText2UNIXtime($thisfile_iso_supplementaryVD_raw['volume_effective_date_time']);

        if ((
$thisfile_iso_supplementaryVD_raw['volume_space_size'] * $thisfile_iso_supplementaryVD_raw['logical_block_size']) > $info['filesize']) {
            
$info['error'][] = 'Volume Space Size ('.($thisfile_iso_supplementaryVD_raw['volume_space_size'] * $thisfile_iso_supplementaryVD_raw['logical_block_size']).' bytes) is larger than the file size ('.$info['filesize'].' bytes) (truncated file?)';
        }

        return 
true;
    }


    public function 
ParsePathTable() {
        
$info = &$this->getid3->info;
        if (!isset(
$info['iso']['supplementary_volume_descriptor']['raw']['path_table_l_location']) && !isset($info['iso']['primary_volume_descriptor']['raw']['path_table_l_location'])) {
            return 
false;
        }
        if (isset(
$info['iso']['supplementary_volume_descriptor']['raw']['path_table_l_location'])) {
            
$PathTableLocation $info['iso']['supplementary_volume_descriptor']['raw']['path_table_l_location'];
            
$PathTableSize     $info['iso']['supplementary_volume_descriptor']['raw']['path_table_size'];
            
$TextEncoding      'UTF-16BE'// Big-Endian Unicode
        
} else {
            
$PathTableLocation $info['iso']['primary_volume_descriptor']['raw']['path_table_l_location'];
            
$PathTableSize     $info['iso']['primary_volume_descriptor']['raw']['path_table_size'];
            
$TextEncoding      'ISO-8859-1'// Latin-1
        
}

        if ((
$PathTableLocation 2048) > $info['filesize']) {
            
$info['error'][] = 'Path Table Location specifies an offset ('.($PathTableLocation 2048).') beyond the end-of-file ('.$info['filesize'].')';
            return 
false;
        }

        
$info['iso']['path_table']['offset'] = $PathTableLocation 2048;
        
$this->fseek($info['iso']['path_table']['offset']);
        
$info['iso']['path_table']['raw'] = $this->fread($PathTableSize);

        
$offset 0;
        
$pathcounter 1;
        while (
$offset $PathTableSize) {
            
// shortcut
            
$info['iso']['path_table']['directories'][$pathcounter] = array();
            
$thisfile_iso_pathtable_directories_current = &$info['iso']['path_table']['directories'][$pathcounter];

            
$thisfile_iso_pathtable_directories_current['length']           = getid3_lib::LittleEndian2Int(substr($info['iso']['path_table']['raw'], $offset1));
            
$offset += 1;
            
$thisfile_iso_pathtable_directories_current['extended_length']  = getid3_lib::LittleEndian2Int(substr($info['iso']['path_table']['raw'], $offset1));
            
$offset += 1;
            
$thisfile_iso_pathtable_directories_current['location_logical'] = getid3_lib::LittleEndian2Int(substr($info['iso']['path_table']['raw'], $offset4));
            
$offset += 4;
            
$thisfile_iso_pathtable_directories_current['parent_directory'] = getid3_lib::LittleEndian2Int(substr($info['iso']['path_table']['raw'], $offset2));
            
$offset += 2;
            
$thisfile_iso_pathtable_directories_current['name']             =                  substr($info['iso']['path_table']['raw'], $offset$thisfile_iso_pathtable_directories_current['length']);
            
$offset += $thisfile_iso_pathtable_directories_current['length'] + ($thisfile_iso_pathtable_directories_current['length'] % 2);

            
$thisfile_iso_pathtable_directories_current['name_ascii']       = getid3_lib::iconv_fallback($TextEncoding$info['encoding'], $thisfile_iso_pathtable_directories_current['name']);

            
$thisfile_iso_pathtable_directories_current['location_bytes'] = $thisfile_iso_pathtable_directories_current['location_logical'] * 2048;
            if (
$pathcounter == 1) {
                
$thisfile_iso_pathtable_directories_current['full_path'] = '/';
            } else {
                
$thisfile_iso_pathtable_directories_current['full_path'] = $info['iso']['path_table']['directories'][$thisfile_iso_pathtable_directories_current['parent_directory']]['full_path'].$thisfile_iso_pathtable_directories_current['name_ascii'].'/';
            }
            
$FullPathArray[] = $thisfile_iso_pathtable_directories_current['full_path'];

            
$pathcounter++;
        }

        return 
true;
    }


    public function 
ParseDirectoryRecord($directorydata) {
        
$info = &$this->getid3->info;
        if (isset(
$info['iso']['supplementary_volume_descriptor'])) {
            
$TextEncoding 'UTF-16BE';   // Big-Endian Unicode
        
} else {
            
$TextEncoding 'ISO-8859-1'// Latin-1
        
}

        
$this->fseek($directorydata['location_bytes']);
        
$DirectoryRecordData $this->fread(1);

        while (
ord($DirectoryRecordData{0}) > 33) {

            
$DirectoryRecordData .= $this->fread(ord($DirectoryRecordData{0}) - 1);

            
$ThisDirectoryRecord['raw']['length']                    = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData,  01));
            
$ThisDirectoryRecord['raw']['extended_attribute_length'] = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData,  11));
            
$ThisDirectoryRecord['raw']['offset_logical']            = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData,  24));
            
$ThisDirectoryRecord['raw']['filesize']                  = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData104));
            
$ThisDirectoryRecord['raw']['recording_date_time']       =                  substr($DirectoryRecordData187);
            
$ThisDirectoryRecord['raw']['file_flags']                = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData251));
            
$ThisDirectoryRecord['raw']['file_unit_size']            = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData261));
            
$ThisDirectoryRecord['raw']['interleave_gap_size']       = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData271));
            
$ThisDirectoryRecord['raw']['volume_sequence_number']    = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData282));
            
$ThisDirectoryRecord['raw']['file_identifier_length']    = getid3_lib::LittleEndian2Int(substr($DirectoryRecordData321));
            
$ThisDirectoryRecord['raw']['file_identifier']           =                  substr($DirectoryRecordData33$ThisDirectoryRecord['raw']['file_identifier_length']);

            
$ThisDirectoryRecord['file_identifier_ascii']            = getid3_lib::iconv_fallback($TextEncoding$info['encoding'], $ThisDirectoryRecord['raw']['file_identifier']);

            
$ThisDirectoryRecord['filesize']                  = $ThisDirectoryRecord['raw']['filesize'];
            
$ThisDirectoryRecord['offset_bytes']              = $ThisDirectoryRecord['raw']['offset_logical'] * 2048;
            
$ThisDirectoryRecord['file_flags']['hidden']      = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x01);
            
$ThisDirectoryRecord['file_flags']['directory']   = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x02);
            
$ThisDirectoryRecord['file_flags']['associated']  = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x04);
            
$ThisDirectoryRecord['file_flags']['extended']    = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x08);
            
$ThisDirectoryRecord['file_flags']['permissions'] = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x10);
            
$ThisDirectoryRecord['file_flags']['multiple']    = (bool) ($ThisDirectoryRecord['raw']['file_flags'] & 0x80);
            
$ThisDirectoryRecord['recording_timestamp']       = $this->ISOtime2UNIXtime($ThisDirectoryRecord['raw']['recording_date_time']);

            if (
$ThisDirectoryRecord['file_flags']['directory']) {
                
$ThisDirectoryRecord['filename'] = $directorydata['full_path'];
            } else {
                
$ThisDirectoryRecord['filename'] = $directorydata['full_path'].$this->ISOstripFilenameVersion($ThisDirectoryRecord['file_identifier_ascii']);
                
$info['iso']['files'] = getid3_lib::array_merge_clobber($info['iso']['files'], getid3_lib::CreateDeepArray($ThisDirectoryRecord['filename'], '/'$ThisDirectoryRecord['filesize']));
            }

            
$DirectoryRecord[] = $ThisDirectoryRecord;
            
$DirectoryRecordData $this->fread(1);
        }

        return 
$DirectoryRecord;
    }

    public function 
ISOstripFilenameVersion($ISOfilename) {
        
// convert 'filename.ext;1' to 'filename.ext'
        
if (!strstr($ISOfilename';')) {
            return 
$ISOfilename;
        } else {
            return 
substr($ISOfilename0strpos($ISOfilename';'));
        }
    }

    public function 
ISOtimeText2UNIXtime($ISOtime) {

        
$UNIXyear   = (int) substr($ISOtime,  04);
        
$UNIXmonth  = (int) substr($ISOtime,  42);
        
$UNIXday    = (int) substr($ISOtime,  62);
        
$UNIXhour   = (int) substr($ISOtime,  82);
        
$UNIXminute = (int) substr($ISOtime102);
        
$UNIXsecond = (int) substr($ISOtime122);

        if (!
$UNIXyear) {
            return 
false;
        }
        return 
gmmktime($UNIXhour$UNIXminute$UNIXsecond$UNIXmonth$UNIXday$UNIXyear);
    }

    public function 
ISOtime2UNIXtime($ISOtime) {
        
// Represented by seven bytes:
        // 1: Number of years since 1900
        // 2: Month of the year from 1 to 12
        // 3: Day of the Month from 1 to 31
        // 4: Hour of the day from 0 to 23
        // 5: Minute of the hour from 0 to 59
        // 6: second of the minute from 0 to 59
        // 7: Offset from Greenwich Mean Time in number of 15 minute intervals from -48 (West) to +52 (East)

        
$UNIXyear   ord($ISOtime{0}) + 1900;
        
$UNIXmonth  ord($ISOtime{1});
        
$UNIXday    ord($ISOtime{2});
        
$UNIXhour   ord($ISOtime{3});
        
$UNIXminute ord($ISOtime{4});
        
$UNIXsecond ord($ISOtime{5});
        
$GMToffset  $this->TwosCompliment2Decimal(ord($ISOtime{5}));

        return 
gmmktime($UNIXhour$UNIXminute$UNIXsecond$UNIXmonth$UNIXday$UNIXyear);
    }

    public function 
TwosCompliment2Decimal($BinaryValue) {
        
// http://sandbox.mc.edu/~bennet/cs110/tc/tctod.html
        // First check if the number is negative or positive by looking at the sign bit.
        // If it is positive, simply convert it to decimal.
        // If it is negative, make it positive by inverting the bits and adding one.
        // Then, convert the result to decimal.
        // The negative of this number is the value of the original binary.

        
if ($BinaryValue 0x80) {

            
// negative number
            
return (- ((~$BinaryValue 0xFF) + 1));
        } else {
            
// positive number
            
return $BinaryValue;
        }
    }


}