projects / thirdparty / git.git / blame
| Commit | Line | Data |
|---|---|---|
| 2834bc27 VM |
1 | #ifndef PACK_OBJECTS_H |
| 2 | #define PACK_OBJECTS_H | |
| 3 | ||
| 4 | struct object_entry { | |
| 5 | struct pack_idx_entry idx; | |
| 6 | unsigned long size; /* uncompressed size */ | |
| 7 | struct packed_git *in_pack; /* already in pack */ | |
| 8 | off_t in_pack_offset; | |
| 9 | struct object_entry *delta; /* delta base object */ | |
| 10 | struct object_entry *delta_child; /* deltified objects who bases me */ | |
| 11 | struct object_entry *delta_sibling; /* other deltified objects who | |
| 12 | * uses the same base as me | |
| 13 | */ | |
| 14 | void *delta_data; /* cached delta (uncompressed) */ | |
| 15 | unsigned long delta_size; /* delta data size (uncompressed) */ | |
| 16 | unsigned long z_delta_size; /* delta data size (compressed) */ | |
| 17 | enum object_type type; | |
| 18 | enum object_type in_pack_type; /* could be delta */ | |
| 19 | uint32_t hash; /* name hint hash */ | |
| 7cc8f971 | 20 | unsigned int in_pack_pos; |
| 2834bc27 VM |
21 | unsigned char in_pack_header_size; |
| 22 | unsigned preferred_base:1; /* | |
| 23 | * we do not pack this, but is available | |
| 24 | * to be used as the base object to delta | |
| 25 | * objects against. | |
| 26 | */ | |
| 27 | unsigned no_try_delta:1; | |
| 28 | unsigned tagged:1; /* near the very tip of refs */ | |
| 29 | unsigned filled:1; /* assigned write-order */ | |
| 30 | }; | |
| 31 | ||
| 32 | struct packing_data { | |
| 33 | struct object_entry *objects; | |
| 34 | uint32_t nr_objects, nr_alloc; | |
| 35 | ||
| 36 | int32_t *index; | |
| 37 | uint32_t index_size; | |
| 38 | }; | |
| 39 | ||
| 40 | struct object_entry *packlist_alloc(struct packing_data *pdata, | |
| 41 | const unsigned char *sha1, | |
| 42 | uint32_t index_pos); | |
| 43 | ||
| 44 | struct object_entry *packlist_find(struct packing_data *pdata, | |
| 45 | const unsigned char *sha1, | |
| 46 | uint32_t *index_pos); | |
| 47 | ||
| 68fb36eb VM |
48 | static inline uint32_t pack_name_hash(const char *name) |
| 49 | { | |
| 50 | uint32_t c, hash = 0; | |
| 51 | ||
| 52 | if (!name) | |
| 53 | return 0; | |
| 54 | ||
| 55 | /* | |
| 56 | * This effectively just creates a sortable number from the | |
| 57 | * last sixteen non-whitespace characters. Last characters | |
| 58 | * count "most", so things that end in ".c" sort together. | |
| 59 | */ | |
| 60 | while ((c = *name++) != 0) { | |
| 61 | if (isspace(c)) | |
| 62 | continue; | |
| 63 | hash = (hash >> 2) + (c << 24); | |
| 64 | } | |
| 65 | return hash; | |
| 66 | } | |
| 67 | ||
| 2834bc27 | 68 | #endif |