sys/src/cmd/paqfs/paqfs.h

   1 typedef struct PaqHeader PaqHeader;
   2 typedef struct PaqBlock PaqBlock;
   3 typedef struct PaqTrailer PaqTrailer;
   4 typedef struct PaqDir PaqDir;
   5
   6 enum {
   7         HeaderMagic = 0x529ab12b,
   8         HeaderSize = 44,
   9         BigHeaderMagic = 0x25a9,
  10         BlockMagic = 0x198a1cbf,
  11         BlockSize = 12,
  12         BigBlockMagic = 0x91a8,
  13         TrailerMagic = 0x6b46e688,
  14         TrailerSize = 28,
  15         Version = 1,
  16         MaxBlockSize = 512*1024,
  17         MinBlockSize = 512,
  18         MinDirSize = 28,
  19 };
  20
  21 /* block types */
  22 enum {
  23         DirBlock,
  24         DataBlock,
  25         PointerBlock,
  26 };
  27
  28 /* encodings */
  29 enum {
  30         NoEnc,
  31         DeflateEnc,
  32 };
  33
  34 struct PaqHeader
  35 {
  36         ulong   magic;
  37         ushort  version;
  38         ulong   blocksize;
  39         ulong   time;
  40         char    label[32];
  41 };
  42
  43 struct PaqBlock
  44 {
  45         ulong   magic;
  46         ulong   size;           /* data size - always <= blocksize */
  47         uchar   type;
  48         uchar   encoding;
  49         ulong   adler32;        /* applied to unencoded data */
  50 };
  51
  52 struct PaqTrailer
  53 {
  54         ulong   magic;
  55         ulong   root;
  56         uchar   sha1[20];
  57 };
  58
  59 struct PaqDir
  60 {
  61         ulong   qid;
  62         ulong   mode;
  63         ulong   mtime;
  64         ulong   length;
  65         ulong   offset;         /* to pointer block */
  66         char    *name;
  67         char    *uid;
  68         char    *gid;
  69 };