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a733cb6 Change pack file format. Hopefully for the last time.
Linus Torvalds authored Jun 28, 2005
1 #ifndef PACK_H
2 #define PACK_H
3
1974632 Remove TYPE_* constant macros and use object_type enums consistently.
Linus Torvalds authored Jul 11, 2006
4 #include "object.h"
a733cb6 Change pack file format. Hopefully for the last time.
Linus Torvalds authored Jun 28, 2005
5
6 /*
7 * Packed object header
8 */
9 #define PACK_SIGNATURE 0x5041434b /* "PACK" */
29f049a Revert "move pack creation to version 3"
Junio C Hamano authored Oct 14, 2006
10 #define PACK_VERSION 2
d60fc1c remove delta-against-self bit
Nicolas Pitre authored Feb 9, 2006
11 #define pack_version_ok(v) ((v) == htonl(2) || (v) == htonl(3))
a733cb6 Change pack file format. Hopefully for the last time.
Linus Torvalds authored Jun 28, 2005
12 struct pack_header {
bb79103 @corecode Use fixed-size integers for the on-disk pack structure.
corecode authored Jan 17, 2007
13 uint32_t hdr_signature;
14 uint32_t hdr_version;
15 uint32_t hdr_entries;
a733cb6 Change pack file format. Hopefully for the last time.
Linus Torvalds authored Jun 28, 2005
16 };
17
df1b059 @spearce Document pack .idx file format upgrade strategy.
spearce authored Jan 17, 2007
18 /*
4287307 [PATCH] clean up pack index handling a bit
Nicolas Pitre authored Mar 16, 2007
19 * The first four bytes of index formats later than version 1 should
20 * start with this signature, as all older git binaries would find this
21 * value illegal and abort reading the file.
df1b059 @spearce Document pack .idx file format upgrade strategy.
spearce authored Jan 18, 2007
22 *
23 * This is the case because the number of objects in a packfile
24 * cannot exceed 1,431,660,000 as every object would need at least
4287307 [PATCH] clean up pack index handling a bit
Nicolas Pitre authored Mar 16, 2007
25 * 3 bytes of data and the overall packfile cannot exceed 4 GiB with
26 * version 1 of the index file due to the offsets limited to 32 bits.
27 * Clearly the signature exceeds this maximum.
df1b059 @spearce Document pack .idx file format upgrade strategy.
spearce authored Jan 18, 2007
28 *
29 * Very old git binaries will also compare the first 4 bytes to the
30 * next 4 bytes in the index and abort with a "non-monotonic index"
31 * error if the second 4 byte word is smaller than the first 4
32 * byte word. This would be true in the proposed future index
33 * format as idx_signature would be greater than idx_version.
34 */
35 #define PACK_IDX_SIGNATURE 0xff744f63 /* "\377tOc" */
36
aa7e44b Unify write_index_file functions
Geert Bosch authored Jun 1, 2007
37 /* These may be overridden by command-line parameters */
38 extern uint32_t pack_idx_default_version;
39 extern uint32_t pack_idx_off32_limit;
40
4287307 [PATCH] clean up pack index handling a bit
Nicolas Pitre authored Mar 16, 2007
41 /*
42 * Packed object index header
43 */
44 struct pack_idx_header {
45 uint32_t idx_signature;
46 uint32_t idx_version;
47 };
48
aa7e44b Unify write_index_file functions
Geert Bosch authored Jun 1, 2007
49 /*
50 * Common part of object structure used for write_idx_file
51 */
52 struct pack_idx_entry {
53 unsigned char sha1[20];
54 uint32_t crc32;
55 off_t offset;
56 };
57
58 extern const char *write_idx_file(const char *index_name, struct pack_idx_entry **objects, int nr_objects, unsigned char *sha1);
4287307 [PATCH] clean up pack index handling a bit
Nicolas Pitre authored Mar 16, 2007
59
f3bf922 [PATCH] verify-pack updates.
Junio C Hamano authored Jun 30, 2005
60 extern int verify_pack(struct packed_git *, int);
8b0eca7 Create pack-write.c for common pack writing code
Dana L. How authored May 2, 2007
61 extern void fixup_pack_header_footer(int, unsigned char *, const char *, uint32_t);
a69e542 Refactor the pack header reading function out of receive-pack.c
Junio C Hamano authored Jan 22, 2007
62
63 #define PH_ERROR_EOF (-1)
64 #define PH_ERROR_PACK_SIGNATURE (-2)
65 #define PH_ERROR_PROTOCOL (-3)
66 extern int read_pack_header(int fd, struct pack_header *);
a733cb6 Change pack file format. Hopefully for the last time.
Linus Torvalds authored Jun 28, 2005
67 #endif
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