Merge branch 'en/pull-do-not-rebase-after-fast-forwarding'
[git] / sha1-array.c
1 #include "cache.h"
2 #include "sha1-array.h"
3 #include "sha1-lookup.h"
4
5 void oid_array_append(struct oid_array *array, const struct object_id *oid)
6 {
7         ALLOC_GROW(array->oid, array->nr + 1, array->alloc);
8         oidcpy(&array->oid[array->nr++], oid);
9         array->sorted = 0;
10 }
11
12 static int void_hashcmp(const void *a, const void *b)
13 {
14         return oidcmp(a, b);
15 }
16
17 static void oid_array_sort(struct oid_array *array)
18 {
19         QSORT(array->oid, array->nr, void_hashcmp);
20         array->sorted = 1;
21 }
22
23 static const unsigned char *sha1_access(size_t index, void *table)
24 {
25         struct object_id *array = table;
26         return array[index].hash;
27 }
28
29 int oid_array_lookup(struct oid_array *array, const struct object_id *oid)
30 {
31         if (!array->sorted)
32                 oid_array_sort(array);
33         return sha1_pos(oid->hash, array->oid, array->nr, sha1_access);
34 }
35
36 void oid_array_clear(struct oid_array *array)
37 {
38         FREE_AND_NULL(array->oid);
39         array->nr = 0;
40         array->alloc = 0;
41         array->sorted = 0;
42 }
43
44
45 int oid_array_for_each(struct oid_array *array,
46                        for_each_oid_fn fn,
47                        void *data)
48 {
49         int i;
50
51         /* No oid_array_sort() here! See sha1-array.h */
52
53         for (i = 0; i < array->nr; i++) {
54                 int ret = fn(array->oid + i, data);
55                 if (ret)
56                         return ret;
57         }
58         return 0;
59 }
60
61 int oid_array_for_each_unique(struct oid_array *array,
62                               for_each_oid_fn fn,
63                               void *data)
64 {
65         int i;
66
67         if (!array->sorted)
68                 oid_array_sort(array);
69
70         for (i = 0; i < array->nr; i++) {
71                 int ret;
72                 if (i > 0 && oideq(array->oid + i, array->oid + i - 1))
73                         continue;
74                 ret = fn(array->oid + i, data);
75                 if (ret)
76                         return ret;
77         }
78         return 0;
79 }
80
81 void oid_array_filter(struct oid_array *array,
82                       for_each_oid_fn want,
83                       void *cb_data)
84 {
85         unsigned nr = array->nr, src, dst;
86         struct object_id *oids = array->oid;
87
88         for (src = dst = 0; src < nr; src++) {
89                 if (want(&oids[src], cb_data)) {
90                         if (src != dst)
91                                 oidcpy(&oids[dst], &oids[src]);
92                         dst++;
93                 }
94         }
95         array->nr = dst;
96 }