ILIAS  release_5-2 Revision v5.2.25-18-g3f80b828510
Public Member Functions
GetId3\Module\Archive\Szip Class Reference

GetId3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g //. More...

+ Inheritance diagram for GetId3\Module\Archive\Szip:
+ Collaboration diagram for GetId3\Module\Archive\Szip:

Public Member Functions

 analyze ()
 
- Public Member Functions inherited from GetId3\Handler\BaseHandler
 __construct (GetId3Core $getid3, $call_module=null)
 
 analyze ()
 Analyze from file pointer. More...
 
 AnalyzeString (&$string)
 Analyze from string instead. More...
 
 saveAttachment (&$ThisFileInfoIndex, $filename, $offset, $length)
 

Additional Inherited Members

- Protected Member Functions inherited from GetId3\Handler\BaseHandler
 ftell ()
 
 fread ($bytes)
 
 fseek ($bytes, $whence=SEEK_SET)
 
 feof ()
 
 isDependencyFor ($module)
 
 error ($text)
 
 warning ($text)
 
- Protected Attributes inherited from GetId3\Handler\BaseHandler
 $getid3
 
 $data_string_flag = false
 
 $data_string = ''
 
 $data_string_position = 0
 
 $data_string_length = 0
 

Detailed Description

GetId3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g //.

module for analyzing SZIP compressed files

Author
James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g http://www.getid3.org

Definition at line 29 of file Szip.php.

Member Function Documentation

◆ analyze()

GetId3\Module\Archive\Szip::analyze ( )
Returns
boolean

Definition at line 35 of file Szip.php.

References $info, GetId3\Lib\Helper\BigEndian2Int(), GetId3\Handler\BaseHandler\feof(), GetId3\Handler\BaseHandler\fread(), GetId3\Handler\BaseHandler\fseek(), and GetId3\Lib\Helper\PrintHexBytes().

36  {
37  $info = &$this->getid3->info;
38 
39  fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
40  $SZIPHeader = fread($this->getid3->fp, 6);
41  if (substr($SZIPHeader, 0, 4) != "SZ\x0A\x04") {
42  $info['error'][] = 'Expecting "53 5A 0A 04" at offset ' . $info['avdataoffset'] . ', found "' . Helper::PrintHexBytes(substr($SZIPHeader,
43  0,
44  4)) . '"';
45 
46  return false;
47  }
48  $info['fileformat'] = 'szip';
49  $info['szip']['major_version'] = Helper::BigEndian2Int(substr($SZIPHeader,
50  4,
51  1));
52  $info['szip']['minor_version'] = Helper::BigEndian2Int(substr($SZIPHeader,
53  5,
54  1));
55 
56  while (!feof($this->getid3->fp)) {
57  $NextBlockID = fread($this->getid3->fp, 2);
58  switch ($NextBlockID) {
59  case 'SZ':
60  // Note that szip files can be concatenated, this has the same effect as
61  // concatenating the files. this also means that global header blocks
62  // might be present between directory/data blocks.
63  fseek($this->getid3->fp, 4, SEEK_CUR);
64  break;
65 
66  case 'BH':
67  $BHheaderbytes = Helper::BigEndian2Int(fread($this->getid3->fp,
68  3));
69  $BHheaderdata = fread($this->getid3->fp, $BHheaderbytes);
70  $BHheaderoffset = 0;
71  while (strpos($BHheaderdata, "\x00", $BHheaderoffset) > 0) {
72  //filename as \0 terminated string (empty string indicates end)
73  //owner as \0 terminated string (empty is same as last file)
74  //group as \0 terminated string (empty is same as last file)
75  //3 byte filelength in this block
76  //2 byte access flags
77  //4 byte creation time (like in unix)
78  //4 byte modification time (like in unix)
79  //4 byte access time (like in unix)
80 
81  $BHdataArray['filename'] = substr($BHheaderdata,
82  $BHheaderoffset,
83  strcspn($BHheaderdata,
84  "\x00"));
85  $BHheaderoffset += (strlen($BHdataArray['filename']) + 1);
86 
87  $BHdataArray['owner'] = substr($BHheaderdata,
88  $BHheaderoffset,
89  strcspn($BHheaderdata,
90  "\x00"));
91  $BHheaderoffset += (strlen($BHdataArray['owner']) + 1);
92 
93  $BHdataArray['group'] = substr($BHheaderdata,
94  $BHheaderoffset,
95  strcspn($BHheaderdata,
96  "\x00"));
97  $BHheaderoffset += (strlen($BHdataArray['group']) + 1);
98 
99  $BHdataArray['filelength'] = Helper::BigEndian2Int(substr($BHheaderdata,
100  $BHheaderoffset,
101  3));
102  $BHheaderoffset += 3;
103 
104  $BHdataArray['access_flags'] = Helper::BigEndian2Int(substr($BHheaderdata,
105  $BHheaderoffset,
106  2));
107  $BHheaderoffset += 2;
108 
109  $BHdataArray['creation_time'] = Helper::BigEndian2Int(substr($BHheaderdata,
110  $BHheaderoffset,
111  4));
112  $BHheaderoffset += 4;
113 
114  $BHdataArray['modification_time'] = Helper::BigEndian2Int(substr($BHheaderdata,
115  $BHheaderoffset,
116  4));
117  $BHheaderoffset += 4;
118 
119  $BHdataArray['access_time'] = Helper::BigEndian2Int(substr($BHheaderdata,
120  $BHheaderoffset,
121  4));
122  $BHheaderoffset += 4;
123 
124  $info['szip']['BH'][] = $BHdataArray;
125  }
126  break;
127 
128  default:
129  break 2;
130  }
131  }
132 
133  return true;
134  }
GetId3\Lib\Helper\PrintHexBytes
static PrintHexBytes($string, $hex=true, $spaces=true, $htmlencoding='UTF-8')
Definition: Helper.php:36
GetId3\Handler\BaseHandler\fseek
fseek($bytes, $whence=SEEK_SET)
Definition: BaseHandler.php:148
$info
$info
Definition: example_052.php:80
GetId3\Lib\Helper\BigEndian2Int
static BigEndian2Int($byteword, $synchsafe=false, $signed=false)
Definition: Helper.php:374
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The documentation for this class was generated from the following file: