1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "common.h"
#include "buf.h"
#include "futils.h"
#include "hash.h"
#include "odb.h"
#include "array.h"
#include "oidmap.h"
#include "pack-objects.h"
#include "git2/odb_backend.h"
#include "git2/object.h"
#include "git2/types.h"
#include "git2/pack.h"
#include "git2/sys/odb_backend.h"
#include "git2/sys/mempack.h"
struct memobject {
git_oid oid;
size_t len;
git_object_t type;
char data[GIT_FLEX_ARRAY];
};
struct memory_packer_db {
git_odb_backend parent;
git_oidmap *objects;
git_array_t(struct memobject *) commits;
};
static int impl__write(git_odb_backend *_backend, const git_oid *oid, const void *data, size_t len, git_object_t type)
{
struct memory_packer_db *db = (struct memory_packer_db *)_backend;
struct memobject *obj = NULL;
size_t alloc_len;
if (git_oidmap_exists(db->objects, oid))
return 0;
GIT_ERROR_CHECK_ALLOC_ADD(&alloc_len, sizeof(struct memobject), len);
obj = git__malloc(alloc_len);
GIT_ERROR_CHECK_ALLOC(obj);
memcpy(obj->data, data, len);
git_oid_cpy(&obj->oid, oid);
obj->len = len;
obj->type = type;
if (git_oidmap_set(db->objects, &obj->oid, obj) < 0)
return -1;
if (type == GIT_OBJECT_COMMIT) {
struct memobject **store = git_array_alloc(db->commits);
GIT_ERROR_CHECK_ALLOC(store);
*store = obj;
}
return 0;
}
static int impl__exists(git_odb_backend *backend, const git_oid *oid)
{
struct memory_packer_db *db = (struct memory_packer_db *)backend;
return git_oidmap_exists(db->objects, oid);
}
static int impl__read(void **buffer_p, size_t *len_p, git_object_t *type_p, git_odb_backend *backend, const git_oid *oid)
{
struct memory_packer_db *db = (struct memory_packer_db *)backend;
struct memobject *obj;
if ((obj = git_oidmap_get(db->objects, oid)) == NULL)
return GIT_ENOTFOUND;
*len_p = obj->len;
*type_p = obj->type;
*buffer_p = git__malloc(obj->len);
GIT_ERROR_CHECK_ALLOC(*buffer_p);
memcpy(*buffer_p, obj->data, obj->len);
return 0;
}
static int impl__read_header(size_t *len_p, git_object_t *type_p, git_odb_backend *backend, const git_oid *oid)
{
struct memory_packer_db *db = (struct memory_packer_db *)backend;
struct memobject *obj;
if ((obj = git_oidmap_get(db->objects, oid)) == NULL)
return GIT_ENOTFOUND;
*len_p = obj->len;
*type_p = obj->type;
return 0;
}
static int git_mempack__dump(
git_str *pack,
git_repository *repo,
git_odb_backend *_backend)
{
struct memory_packer_db *db = (struct memory_packer_db *)_backend;
git_packbuilder *packbuilder;
uint32_t i;
int err = -1;
if (git_packbuilder_new(&packbuilder, repo) < 0)
return -1;
git_packbuilder_set_threads(packbuilder, 0);
for (i = 0; i < db->commits.size; ++i) {
struct memobject *commit = db->commits.ptr[i];
err = git_packbuilder_insert_commit(packbuilder, &commit->oid);
if (err < 0)
goto cleanup;
}
err = git_packbuilder__write_buf(pack, packbuilder);
cleanup:
git_packbuilder_free(packbuilder);
return err;
}
int git_mempack_dump(
git_buf *pack,
git_repository *repo,
git_odb_backend *_backend)
{
GIT_BUF_WRAP_PRIVATE(pack, git_mempack__dump, repo, _backend);
}
int git_mempack_reset(git_odb_backend *_backend)
{
struct memory_packer_db *db = (struct memory_packer_db *)_backend;
struct memobject *object = NULL;
git_oidmap_foreach_value(db->objects, object, {
git__free(object);
});
git_array_clear(db->commits);
git_oidmap_clear(db->objects);
return 0;
}
static void impl__free(git_odb_backend *_backend)
{
struct memory_packer_db *db = (struct memory_packer_db *)_backend;
git_mempack_reset(_backend);
git_oidmap_free(db->objects);
git__free(db);
}
int git_mempack_new(git_odb_backend **out)
{
struct memory_packer_db *db;
GIT_ASSERT_ARG(out);
db = git__calloc(1, sizeof(struct memory_packer_db));
GIT_ERROR_CHECK_ALLOC(db);
if (git_oidmap_new(&db->objects) < 0)
return -1;
db->parent.version = GIT_ODB_BACKEND_VERSION;
db->parent.read = &impl__read;
db->parent.write = &impl__write;
db->parent.read_header = &impl__read_header;
db->parent.exists = &impl__exists;
db->parent.free = &impl__free;
*out = (git_odb_backend *)db;
return 0;
}
|
