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      1 // 7z/7zHeader.h
      2 
      3 #ifndef __7Z_HEADER_H
      4 #define __7Z_HEADER_H
      5 
      6 #include "../../../Common/MyTypes.h"
      7 
      8 namespace NArchive {
      9 namespace N7z {
     10 
     11 const unsigned kSignatureSize = 6;
     12 extern Byte kSignature[kSignatureSize];
     13 
     14 // #define _7Z_VOL
     15 // 7z-MultiVolume is not finished yet.
     16 // It can work already, but I still do not like some
     17 // things of that new multivolume format.
     18 // So please keep it commented.
     19 
     20 #ifdef _7Z_VOL
     21 extern Byte kFinishSignature[kSignatureSize];
     22 #endif
     23 
     24 struct CArchiveVersion
     25 {
     26   Byte Major;
     27   Byte Minor;
     28 };
     29 
     30 const Byte kMajorVersion = 0;
     31 
     32 struct CStartHeader
     33 {
     34   UInt64 NextHeaderOffset;
     35   UInt64 NextHeaderSize;
     36   UInt32 NextHeaderCRC;
     37 };
     38 
     39 const UInt32 kStartHeaderSize = 20;
     40 
     41 #ifdef _7Z_VOL
     42 struct CFinishHeader: public CStartHeader
     43 {
     44   UInt64 ArchiveStartOffset;  // data offset from end if that struct
     45   UInt64 AdditionalStartBlockSize; // start  signature & start header size
     46 };
     47 
     48 const UInt32 kFinishHeaderSize = kStartHeaderSize + 16;
     49 #endif
     50 
     51 namespace NID
     52 {
     53   enum EEnum
     54   {
     55     kEnd,
     56 
     57     kHeader,
     58 
     59     kArchiveProperties,
     60 
     61     kAdditionalStreamsInfo,
     62     kMainStreamsInfo,
     63     kFilesInfo,
     64 
     65     kPackInfo,
     66     kUnpackInfo,
     67     kSubStreamsInfo,
     68 
     69     kSize,
     70     kCRC,
     71 
     72     kFolder,
     73 
     74     kCodersUnpackSize,
     75     kNumUnpackStream,
     76 
     77     kEmptyStream,
     78     kEmptyFile,
     79     kAnti,
     80 
     81     kName,
     82     kCTime,
     83     kATime,
     84     kMTime,
     85     kWinAttrib,
     86     kComment,
     87 
     88     kEncodedHeader,
     89 
     90     kStartPos,
     91     kDummy
     92 
     93     // kNtSecure,
     94     // kParent,
     95     // kIsAux
     96   };
     97 }
     98 
     99 
    100 const UInt32 k_Copy = 0;
    101 const UInt32 k_Delta = 3;
    102 
    103 const UInt32 k_LZMA2 = 0x21;
    104 
    105 const UInt32 k_SWAP2 = 0x20302;
    106 const UInt32 k_SWAP4 = 0x20304;
    107 
    108 const UInt32 k_LZMA  = 0x30101;
    109 const UInt32 k_PPMD  = 0x30401;
    110 
    111 const UInt32 k_Deflate = 0x40108;
    112 const UInt32 k_BZip2   = 0x40202;
    113 
    114 const UInt32 k_BCJ   = 0x3030103;
    115 const UInt32 k_BCJ2  = 0x303011B;
    116 const UInt32 k_PPC   = 0x3030205;
    117 const UInt32 k_IA64  = 0x3030401;
    118 const UInt32 k_ARM   = 0x3030501;
    119 const UInt32 k_ARMT  = 0x3030701;
    120 const UInt32 k_SPARC = 0x3030805;
    121 
    122 const UInt32 k_AES   = 0x6F10701;
    123 
    124 
    125 static inline bool IsFilterMethod(UInt64 m)
    126 {
    127   if (m > (UInt64)0xFFFFFFFF)
    128     return false;
    129   switch ((UInt32)m)
    130   {
    131     case k_Delta:
    132     case k_BCJ:
    133     case k_BCJ2:
    134     case k_PPC:
    135     case k_IA64:
    136     case k_ARM:
    137     case k_ARMT:
    138     case k_SPARC:
    139     case k_SWAP2:
    140     case k_SWAP4:
    141       return true;
    142   }
    143   return false;
    144 }
    145 
    146 }}
    147 
    148 #endif
    149