pack.h

   1 #ifndef PACK_H
   2 #define PACK_H
   3
   4 /*
   5  * The packed object type is stored in 3 bits.
   6  * The type value 0 is a reserved prefix if ever there is more than 7
   7  * object types, or any future format extensions.
   8  */
   9 enum object_type {
  10         OBJ_EXT = 0,
  11         OBJ_COMMIT = 1,
  12         OBJ_TREE = 2,
  13         OBJ_BLOB = 3,
  14         OBJ_TAG = 4,
  15         /* 5/6 for future expansion */
  16         OBJ_DELTA = 7,
  17 };
  18
  19 /*
  20  * Packed object header
  21  */
  22 #define PACK_SIGNATURE 0x5041434b       /* "PACK" */
  23 #define PACK_VERSION 2
  24 #define pack_version_ok(v) ((v) == htonl(2) || (v) == htonl(3))
  25 struct pack_header {
  26         unsigned int hdr_signature;
  27         unsigned int hdr_version;
  28         unsigned int hdr_entries;
  29 };
  30
  31 extern int verify_pack(struct packed_git *, int);
  32 extern int check_reuse_pack_delta(struct packed_git *, unsigned long,
  33                                   unsigned char *, unsigned long *,
  34                                   enum object_type *);
  35 #endif