7z Format description (4.59)
----------------------------

This file contains description of 7z archive format. 
7z archive can contain files compressed with any method.
See "Methods.txt" for description 7z Format description (4.59)


Format structure Overview
-------------------------

Some fields can be optional.

Archive structure
~~~~~~~~~~~~~~~~~  
SignatureHeader
[PackedStreams]
[PackedStreamsForHeaders]
[
  Header 
  or 
  {
    Packed Header
    HeaderInfo
  }
]



Header structure
~~~~~~~~~~~~~~~~  
{
  ArchiveProperties
  AdditionalStreams
  {
    PackInfo
    {
      PackPos
      NumPackStreams
      Sizes[NumPackStreams]
      CRCs[NumPackStreams]
    }
    CodersInfo
    {
      NumFolders
      Folders[NumFolders]
      {
        NumCoders
        CodersInfo[NumCoders]
        {
          ID
          NumInStreams;
          NumOutStreams;
          PropertiesSize
          Properties[PropertiesSize]
        }
        NumBindPairs
        BindPairsInfo[NumBindPairs]
        {
          InIndex;
          OutIndex;
        }
        PackedIndices
      }
      UnPackSize[Folders][Folders.NumOutstreams]
      CRCs[NumFolders]
    }
    SubStreamsInfo
    {
      NumUnPackStreamsInFolders[NumFolders];
      UnPackSizes[]
      ---------------java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
 java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
  
  }
     
  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
  FilesInfo
  {
    NumFiles
    Properties[]
    {
      ID
      Size
      Data
    }
  }
}

HeaderInfo structure
~~~~~~~~~
{
  (Same as in AdditionalStreams)
}



java.lang.StringIndexOutOfBoundsException: Range [11, 5) out of bounds for length 33
----------------------------java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33

7 uses   encoding

7z java.lang.StringIndexOutOfBoundsException: Range [10, 8) out of bounds for length 24
[}
Header
[]

REAL_UINT64 means real UINT64.

UINT64 means real UINT64 encoded with the following         

  Size of encoding sequence depends from       java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
  First_Byte  Extra_Bytes}
  (binary)java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
  0xxxxxxx              :( xxxxxxx           java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
  10     y[]  : (  xxxxxx << (8   M.xt"for descriptiondefinedcompressing.
  110xxxxxy
  .java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
  1111110x     y[]  :(       x< (8java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
       y[]:y
  11111111    BYTE y[8]  :                         ]



Property IDs
-----

0x00 = kEnd

0x01 = kHeader    HeaderInfojava.lang.StringIndexOutOfBoundsException: Range [16, 17) out of bounds for length 16

0x02[
    
0x03 = kAdditionalStreamsInfo
REAL_UINT64 meansrealUINT64.
0
    
0x06 = kPackInfo
0x07 = kUnPackInfo
08=kSubStreamsInfo

0x09 = kSize
0x0A = kCRC(binary java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13

0x0B = kFolder

0x0C = kCodersUnPackSize
0x0D = kNumUnPackStream

0x0E = kEmptyStream
0x0F = kEmptyFile
0x10  .

0x11 = kName
0x12 = kCTime
0x13 = 11111110 BYTE 7 :                        
0x14 = kMTime
0x15 = kWinAttributes
0Property

000=

001=kHeader
0x19 =kDummy


7z format headers
-------------0x04=kMainStreamsInfo

atureHeader
~~~~~~~java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
  java.lang.StringIndexOutOfBoundsException: Range [12, 6) out of bounds for length 58

  ArchiveVersion
  {
    BYTE Major;   // now = 0
    BYTE Minor;   // now = 2
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

  UINT32 StartHeaderCRC;

  StartHeader
  {
L_UINT64
    java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
    INT32 NextHeaderCRC
  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3


..........................


ArchiveProperties
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
for ;;
S
  BYTEPropertyType;
  if (aType == 0)
    break;
  kSignature]={7,'z' 0xBC x,0,0x1C;
  java.lang.StringIndexOutOfBoundsException: Range [16, 6) out of bounds for length 34
}


Digests (NumStreams)
~~~~~~~~~~~~~~~~~~~~~
  BYTE java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 0
  if == 0
  {
    for(NumStreams)
      BIT Defined
  
  java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3


ArchiveProperties
~~~~~~
  BYTE NID::kPackInfo  (0x06)
  UINT64 PackPos
  UINT64 NumPackStreams

  [
  BYTEBYTE PropertyType
   (aType=0)
  []

  []
  BYTE
  [java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 19
  []

  BYTE NID::kEnd


java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
~  
  UINT64;
  for N)
  C
    YTE 
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
      03CodecIdSize{
      4:  Is Complex         
      5:   NID::kPackInfo)
      6:  Reserved
      7 morealternative N used anymore,must be 0).
     
    BYTE CodecId[odecIdSize
    if UINT64 PackSizes[umPackStreamsjava.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
      PackStreamDigestsjava.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
      java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 5
       ;
    }
        5    Attributes
    {
      UINT64 7:  There are more al.( usedanymore, must be 0.
      BYTE [PropertiesSize
    }
  }
    
  NumBindPairs = NumOutStreamsTotal - 1;

  for ()
  }
    UINT64 InIndex;
    UINT64 OutIndex;
  }

  NumPackedStreams =NumInStreamsTotal ;
  if (BYTE Properties[PropertiesSize]
    for(NumPackedStreams)
    {
      UINT64 Index;
    }




Coders Info
~~for (umBindPairsjava.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20

  BYTEfo  (0x07 }


  BYTE NID::kFolder  (
  [java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
  java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 0
  switch(External
    NID:kFolder  (x0Bjava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
     ::
      Folders[NumFolders]
    case 1:
      switchExternal)
  }


  BYTE ID:  BYTE ID::kCodersUnPackSize[NumFoldersjava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
  (olders)
    forNotes aboutjava.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
     UINT64 UnPackSize;


  []
  BYTE NID::kCRC   java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  z archiveNumOutStreams)
  []

  

  BYTE NID::kEnd



SubStreams Info
~~~
  REAL_UINT64 means real UINT64.

  [BYTE NID:kCRC   (0x0A)
  UINT64 means real UINT64 encoded with the   UnPackDigests[NumFolders]
  NumUnPackStreamsInFolders[java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 4
  [


  []
   NID::kSize  (0x09~~~~~
  UINT64[java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
  [


  []
  BYTE::kCRC  (0x0A)
  Digests[Number of java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 4
  []

  
  BYTE NID::kEnd


Streams  Info
~~~~~~~

  []
  PackInfo
  []


  []
  CodersInfo
  [


  []
  java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
  ]

  TENID:[java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4


FilesInfo
~~~~~~~~~
  BYTE java.lang.StringIndexOutOfBoundsException: Range [0, 10) out of bounds for length 0
  UINT64 NumFiles

  for (;;)
  {
    BYTE java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
    if (0x06 =kPackInfoPackInfo
      break

    UINT64 Size;

    switchPropertyType
    java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
      java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 0
        
          BIT IsEmptyStream

      kEmptyFile:     (0x0F)
        java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
          x12 = for (;)

      kAnti:          (0x10)
        ams)
          BITif (aType = 0)
      
       case kCTime: (0x12)
      case kATime: (0x13)
      casejava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 21
        YTE AllAreDefined
        f (AllAreDefined == 0 for()
        {
          for(
            BITtartPos
        
        java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
        if(External != 0)
                    java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
        []
        for(Definded Items)
          UINT64 Time
        [ArchiveVersion
        {
          BYTE Major;   // now = 0
        BYTE ;
            BYTE Minor;   / now = 2
          UINT64 DataIndex
        []
        for(Files
        {
          wchar_t~~~~~~~
           (There AreAttributes)
        }
        []

      kAttributes:  (0x15)
        BYTE StreamsInfo java.lang.StringIndexOutOfBoundsException: Range [25, 17) out of bounds for length 32
        if
        {
          (NumFiles)
            BIT AttributesAreDefined
        }
        java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 3
        if(xternal != 0)
          UINT64 DataIndex
        []
        for(java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 3
          UINT32 Attributes
        []
    }
  }


Header
~~~~~~
  )

  [
  java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 0
  [java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4

  [java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
  java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 3
  java.lang.StringIndexOutOfBoundsException: Range [4, 1) out of bounds for length 11
  []

  ]
  BYTE:MainStreamsInfo    0java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
  BYTE NID::kCRC   (0x0A)
  []

  []
  FilesInfo
  []

  BYTE 


java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 0
~~~~~
  []
  BYTE NID::kEncodedHeader; (0x17)
  msInfo  EncodedHeader
  []


---
End[