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Commit | Line | Data |
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175785e5 | 1 | #include "object.h" |
e9eefa67 DB |
2 | #include "blob.h" |
3 | #include "tree.h" | |
4 | #include "commit.h" | |
175785e5 | 5 | #include "cache.h" |
e9eefa67 | 6 | #include "tag.h" |
d1af002d | 7 | #include "delta.h" |
175785e5 DB |
8 | |
9 | struct object **objs; | |
10 | int nr_objs; | |
11 | static int obj_allocs; | |
12 | ||
13 | static int find_object(unsigned char *sha1) | |
14 | { | |
15 | int first = 0, last = nr_objs; | |
16 | ||
17 | while (first < last) { | |
18 | int next = (first + last) / 2; | |
19 | struct object *obj = objs[next]; | |
20 | int cmp; | |
21 | ||
22 | cmp = memcmp(sha1, obj->sha1, 20); | |
23 | if (!cmp) | |
24 | return next; | |
25 | if (cmp < 0) { | |
26 | last = next; | |
27 | continue; | |
28 | } | |
29 | first = next+1; | |
30 | } | |
31 | return -first-1; | |
32 | } | |
33 | ||
34 | struct object *lookup_object(unsigned char *sha1) | |
35 | { | |
36 | int pos = find_object(sha1); | |
37 | if (pos >= 0) | |
38 | return objs[pos]; | |
39 | return NULL; | |
40 | } | |
41 | ||
42 | void created_object(unsigned char *sha1, struct object *obj) | |
43 | { | |
44 | int pos = find_object(sha1); | |
45 | ||
46 | obj->parsed = 0; | |
47 | memcpy(obj->sha1, sha1, 20); | |
48 | obj->type = NULL; | |
49 | obj->refs = NULL; | |
50 | obj->used = 0; | |
51 | ||
52 | if (pos >= 0) | |
53 | die("Inserting %s twice\n", sha1_to_hex(sha1)); | |
54 | pos = -pos-1; | |
55 | ||
56 | if (obj_allocs == nr_objs) { | |
57 | obj_allocs = alloc_nr(obj_allocs); | |
812666c8 | 58 | objs = xrealloc(objs, obj_allocs * sizeof(struct object *)); |
175785e5 DB |
59 | } |
60 | ||
61 | /* Insert it into the right place */ | |
62 | memmove(objs + pos + 1, objs + pos, (nr_objs - pos) * | |
63 | sizeof(struct object *)); | |
64 | ||
65 | objs[pos] = obj; | |
66 | nr_objs++; | |
67 | } | |
68 | ||
69 | void add_ref(struct object *refer, struct object *target) | |
70 | { | |
71 | struct object_list **pp = &refer->refs; | |
72 | struct object_list *p; | |
73 | ||
74 | while ((p = *pp) != NULL) { | |
75 | if (p->item == target) | |
76 | return; | |
77 | pp = &p->next; | |
78 | } | |
79 | ||
80 | target->used = 1; | |
812666c8 | 81 | p = xmalloc(sizeof(*p)); |
175785e5 DB |
82 | p->item = target; |
83 | p->next = NULL; | |
84 | *pp = p; | |
85 | } | |
86 | ||
87 | void mark_reachable(struct object *obj, unsigned int mask) | |
88 | { | |
89 | struct object_list *p = obj->refs; | |
90 | ||
91 | /* If we've been here already, don't bother */ | |
92 | if (obj->flags & mask) | |
93 | return; | |
94 | obj->flags |= mask; | |
95 | while (p) { | |
96 | mark_reachable(p->item, mask); | |
97 | p = p->next; | |
98 | } | |
99 | } | |
e9eefa67 DB |
100 | |
101 | struct object *parse_object(unsigned char *sha1) | |
102 | { | |
103 | unsigned long mapsize; | |
104 | void *map = map_sha1_file(sha1, &mapsize); | |
105 | if (map) { | |
d1af002d | 106 | int is_delta; |
bd2c39f5 | 107 | struct object *obj; |
e9eefa67 DB |
108 | char type[100]; |
109 | unsigned long size; | |
110 | void *buffer = unpack_sha1_file(map, mapsize, type, &size); | |
13019d41 | 111 | munmap(map, mapsize); |
e9eefa67 DB |
112 | if (!buffer) |
113 | return NULL; | |
d1af002d NP |
114 | is_delta = !strcmp(type, "delta"); |
115 | if (!is_delta && check_sha1_signature(sha1, buffer, size, type) < 0) | |
e9eefa67 | 116 | printf("sha1 mismatch %s\n", sha1_to_hex(sha1)); |
d1af002d NP |
117 | if (is_delta) { |
118 | struct delta *delta = lookup_delta(sha1); | |
119 | parse_delta_buffer(delta, buffer, size); | |
120 | obj = (struct object *) delta; | |
121 | } else if (!strcmp(type, "blob")) { | |
bd2c39f5 NP |
122 | struct blob *blob = lookup_blob(sha1); |
123 | parse_blob_buffer(blob, buffer, size); | |
124 | obj = &blob->object; | |
e9eefa67 | 125 | } else if (!strcmp(type, "tree")) { |
bd2c39f5 NP |
126 | struct tree *tree = lookup_tree(sha1); |
127 | parse_tree_buffer(tree, buffer, size); | |
128 | obj = &tree->object; | |
e9eefa67 | 129 | } else if (!strcmp(type, "commit")) { |
bd2c39f5 NP |
130 | struct commit *commit = lookup_commit(sha1); |
131 | parse_commit_buffer(commit, buffer, size); | |
132 | obj = &commit->object; | |
e9eefa67 | 133 | } else if (!strcmp(type, "tag")) { |
bd2c39f5 NP |
134 | struct tag *tag = lookup_tag(sha1); |
135 | parse_tag_buffer(tag, buffer, size); | |
136 | obj = &tag->object; | |
e9eefa67 | 137 | } else { |
bd2c39f5 | 138 | obj = NULL; |
e9eefa67 | 139 | } |
bd2c39f5 NP |
140 | free(buffer); |
141 | return obj; | |
e9eefa67 DB |
142 | } |
143 | return NULL; | |
144 | } |