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Commit | Line | Data |
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e52ed7a5 | 1 | /* |
359fc2d2 | 2 | * Copyright (C) the libgit2 contributors. All rights reserved. |
e52ed7a5 | 3 | * |
bb742ede VM |
4 | * This file is part of libgit2, distributed under the GNU GPL v2 with |
5 | * a Linking Exception. For full terms see the included COPYING file. | |
e52ed7a5 | 6 | */ |
eae0bfdc PP |
7 | |
8 | #include "object.h" | |
9 | ||
e52ed7a5 VM |
10 | #include "git2/object.h" |
11 | ||
e52ed7a5 VM |
12 | #include "repository.h" |
13 | ||
e579e0f7 | 14 | #include "buf.h" |
e52ed7a5 | 15 | #include "commit.h" |
ac3d33df | 16 | #include "hash.h" |
e52ed7a5 VM |
17 | #include "tree.h" |
18 | #include "blob.h" | |
61d7328d | 19 | #include "oid.h" |
e52ed7a5 VM |
20 | #include "tag.h" |
21 | ||
f2dddf52 | 22 | bool git_object__strict_input_validation = true; |
22a19f5b | 23 | |
ac3d33df | 24 | extern int git_odb_hash(git_oid *out, const void *data, size_t len, git_object_t type); |
22a2d3d5 | 25 | size_t git_object__size(git_object_t type); |
ac3d33df | 26 | |
78606263 | 27 | typedef struct { |
87d9869f | 28 | const char *str; /* type name string */ |
e52ed7a5 | 29 | size_t size; /* size in bytes of the object structure */ |
78606263 | 30 | |
3f27127d | 31 | int (*parse)(void *self, git_odb_object *obj); |
ac3d33df | 32 | int (*parse_raw)(void *self, const char *data, size_t size); |
78606263 RB |
33 | void (*free)(void *self); |
34 | } git_object_def; | |
35 | ||
36 | static git_object_def git_objects_table[] = { | |
ac3d33df JK |
37 | /* 0 = GIT_OBJECT__EXT1 */ |
38 | { "", 0, NULL, NULL, NULL }, | |
e52ed7a5 | 39 | |
ac3d33df JK |
40 | /* 1 = GIT_OBJECT_COMMIT */ |
41 | { "commit", sizeof(git_commit), git_commit__parse, git_commit__parse_raw, git_commit__free }, | |
e52ed7a5 | 42 | |
ac3d33df JK |
43 | /* 2 = GIT_OBJECT_TREE */ |
44 | { "tree", sizeof(git_tree), git_tree__parse, git_tree__parse_raw, git_tree__free }, | |
e52ed7a5 | 45 | |
ac3d33df JK |
46 | /* 3 = GIT_OBJECT_BLOB */ |
47 | { "blob", sizeof(git_blob), git_blob__parse, git_blob__parse_raw, git_blob__free }, | |
e52ed7a5 | 48 | |
ac3d33df JK |
49 | /* 4 = GIT_OBJECT_TAG */ |
50 | { "tag", sizeof(git_tag), git_tag__parse, git_tag__parse_raw, git_tag__free }, | |
e52ed7a5 | 51 | |
ac3d33df JK |
52 | /* 5 = GIT_OBJECT__EXT2 */ |
53 | { "", 0, NULL, NULL, NULL }, | |
54 | /* 6 = GIT_OBJECT_OFS_DELTA */ | |
55 | { "OFS_DELTA", 0, NULL, NULL, NULL }, | |
56 | /* 7 = GIT_OBJECT_REF_DELTA */ | |
57 | { "REF_DELTA", 0, NULL, NULL, NULL }, | |
e52ed7a5 VM |
58 | }; |
59 | ||
ac3d33df JK |
60 | int git_object__from_raw( |
61 | git_object **object_out, | |
62 | const char *data, | |
63 | size_t size, | |
64 | git_object_t type) | |
65 | { | |
66 | git_object_def *def; | |
67 | git_object *object; | |
68 | size_t object_size; | |
69 | int error; | |
70 | ||
c25aa7cd | 71 | GIT_ASSERT_ARG(object_out); |
ac3d33df JK |
72 | *object_out = NULL; |
73 | ||
74 | /* Validate type match */ | |
75 | if (type != GIT_OBJECT_BLOB && type != GIT_OBJECT_TREE && type != GIT_OBJECT_COMMIT && type != GIT_OBJECT_TAG) { | |
76 | git_error_set(GIT_ERROR_INVALID, "the requested type is invalid"); | |
77 | return GIT_ENOTFOUND; | |
78 | } | |
79 | ||
80 | if ((object_size = git_object__size(type)) == 0) { | |
81 | git_error_set(GIT_ERROR_INVALID, "the requested type is invalid"); | |
82 | return GIT_ENOTFOUND; | |
83 | } | |
84 | ||
85 | /* Allocate and initialize base object */ | |
86 | object = git__calloc(1, object_size); | |
87 | GIT_ERROR_CHECK_ALLOC(object); | |
88 | object->cached.flags = GIT_CACHE_STORE_PARSED; | |
89 | object->cached.type = type; | |
22a2d3d5 UG |
90 | if ((error = git_odb_hash(&object->cached.oid, data, size, type)) < 0) |
91 | return error; | |
ac3d33df JK |
92 | |
93 | /* Parse raw object data */ | |
94 | def = &git_objects_table[type]; | |
c25aa7cd | 95 | GIT_ASSERT(def->free && def->parse_raw); |
ac3d33df JK |
96 | |
97 | if ((error = def->parse_raw(object, data, size)) < 0) { | |
98 | def->free(object); | |
99 | return error; | |
100 | } | |
101 | ||
102 | git_cached_obj_incref(object); | |
103 | *object_out = object; | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
c6ac28fd RB |
108 | int git_object__from_odb_object( |
109 | git_object **object_out, | |
110 | git_repository *repo, | |
111 | git_odb_object *odb_obj, | |
ac3d33df | 112 | git_object_t type) |
c6ac28fd RB |
113 | { |
114 | int error; | |
78606263 RB |
115 | size_t object_size; |
116 | git_object_def *def; | |
c6ac28fd RB |
117 | git_object *object = NULL; |
118 | ||
c25aa7cd | 119 | GIT_ASSERT_ARG(object_out); |
78606263 RB |
120 | *object_out = NULL; |
121 | ||
122 | /* Validate type match */ | |
ac3d33df JK |
123 | if (type != GIT_OBJECT_ANY && type != odb_obj->cached.type) { |
124 | git_error_set(GIT_ERROR_INVALID, | |
909d5494 | 125 | "the requested type does not match the type in the ODB"); |
c6ac28fd RB |
126 | return GIT_ENOTFOUND; |
127 | } | |
128 | ||
78606263 | 129 | if ((object_size = git_object__size(odb_obj->cached.type)) == 0) { |
ac3d33df | 130 | git_error_set(GIT_ERROR_INVALID, "the requested type is invalid"); |
78606263 RB |
131 | return GIT_ENOTFOUND; |
132 | } | |
133 | ||
134 | /* Allocate and initialize base object */ | |
135 | object = git__calloc(1, object_size); | |
ac3d33df | 136 | GIT_ERROR_CHECK_ALLOC(object); |
c6ac28fd | 137 | |
c6ac28fd | 138 | git_oid_cpy(&object->cached.oid, &odb_obj->cached.oid); |
cf7850a4 | 139 | object->cached.type = odb_obj->cached.type; |
78606263 | 140 | object->cached.size = odb_obj->cached.size; |
c6ac28fd RB |
141 | object->repo = repo; |
142 | ||
78606263 RB |
143 | /* Parse raw object data */ |
144 | def = &git_objects_table[odb_obj->cached.type]; | |
c25aa7cd | 145 | GIT_ASSERT(def->free && def->parse); |
c6ac28fd | 146 | |
e579e0f7 MB |
147 | if ((error = def->parse(object, odb_obj)) < 0) { |
148 | /* | |
149 | * parse returns EINVALID on invalid data; downgrade | |
150 | * that to a normal -1 error code. | |
151 | */ | |
78606263 | 152 | def->free(object); |
e579e0f7 MB |
153 | return -1; |
154 | } | |
c6ac28fd | 155 | |
e579e0f7 MB |
156 | *object_out = git_cache_store_parsed(&repo->objects, object); |
157 | return 0; | |
c6ac28fd RB |
158 | } |
159 | ||
78606263 RB |
160 | void git_object__free(void *obj) |
161 | { | |
ac3d33df | 162 | git_object_t type = ((git_object *)obj)->cached.type; |
78606263 RB |
163 | |
164 | if (type < 0 || ((size_t)type) >= ARRAY_SIZE(git_objects_table) || | |
165 | !git_objects_table[type].free) | |
166 | git__free(obj); | |
167 | else | |
168 | git_objects_table[type].free(obj); | |
169 | } | |
170 | ||
9462c471 VM |
171 | int git_object_lookup_prefix( |
172 | git_object **object_out, | |
173 | git_repository *repo, | |
174 | const git_oid *id, | |
b8457baa | 175 | size_t len, |
ac3d33df | 176 | git_object_t type) |
5de079b8 VM |
177 | { |
178 | git_object *object = NULL; | |
9462c471 | 179 | git_odb *odb = NULL; |
e583334c | 180 | git_odb_object *odb_obj = NULL; |
e172cf08 | 181 | int error = 0; |
5de079b8 | 182 | |
c25aa7cd PP |
183 | GIT_ASSERT_ARG(repo); |
184 | GIT_ASSERT_ARG(object_out); | |
185 | GIT_ASSERT_ARG(id); | |
5de079b8 | 186 | |
8915a140 | 187 | if (len < GIT_OID_MINPREFIXLEN) { |
ac3d33df | 188 | git_error_set(GIT_ERROR_OBJECT, "ambiguous lookup - OID prefix is too short"); |
904b67e6 | 189 | return GIT_EAMBIGUOUS; |
8915a140 | 190 | } |
d0323a5f | 191 | |
9462c471 | 192 | error = git_repository_odb__weakptr(&odb, repo); |
e172cf08 | 193 | if (error < 0) |
9462c471 VM |
194 | return error; |
195 | ||
3d9ef2dc VM |
196 | if (len > GIT_OID_HEXSZ) |
197 | len = GIT_OID_HEXSZ; | |
bd1aa741 | 198 | |
3d9ef2dc | 199 | if (len == GIT_OID_HEXSZ) { |
5df18424 VM |
200 | git_cached_obj *cached = NULL; |
201 | ||
dd453c4d MP |
202 | /* We want to match the full id : we can first look up in the cache, |
203 | * since there is no need to check for non ambiguousity | |
204 | */ | |
5df18424 VM |
205 | cached = git_cache_get_any(&repo->objects, id); |
206 | if (cached != NULL) { | |
207 | if (cached->flags == GIT_CACHE_STORE_PARSED) { | |
208 | object = (git_object *)cached; | |
209 | ||
ac3d33df | 210 | if (type != GIT_OBJECT_ANY && type != object->cached.type) { |
5df18424 | 211 | git_object_free(object); |
ac3d33df | 212 | git_error_set(GIT_ERROR_INVALID, |
22a2d3d5 | 213 | "the requested type does not match the type in the ODB"); |
5df18424 VM |
214 | return GIT_ENOTFOUND; |
215 | } | |
216 | ||
217 | *object_out = object; | |
218 | return 0; | |
219 | } else if (cached->flags == GIT_CACHE_STORE_RAW) { | |
220 | odb_obj = (git_odb_object *)cached; | |
221 | } else { | |
c25aa7cd | 222 | GIT_ASSERT(!"Wrong caching type in the global object cache"); |
7d3ec3ca | 223 | } |
5df18424 VM |
224 | } else { |
225 | /* Object was not found in the cache, let's explore the backends. | |
226 | * We could just use git_odb_read_unique_short_oid, | |
227 | * it is the same cost for packed and loose object backends, | |
228 | * but it may be much more costly for sqlite and hiredis. | |
229 | */ | |
230 | error = git_odb_read(&odb_obj, odb, id); | |
dd453c4d | 231 | } |
dd453c4d | 232 | } else { |
61d7328d | 233 | git_oid short_oid = {{ 0 }}; |
dd453c4d | 234 | |
61d7328d | 235 | git_oid__cpy_prefix(&short_oid, id, len); |
dd453c4d | 236 | |
3d9ef2dc | 237 | /* If len < GIT_OID_HEXSZ (a strict short oid was given), we have |
dd453c4d MP |
238 | * 2 options : |
239 | * - We always search in the cache first. If we find that short oid is | |
87d9869f VM |
240 | * ambiguous, we can stop. But in all the other cases, we must then |
241 | * explore all the backends (to find an object if there was match, | |
242 | * or to check that oid is not ambiguous if we have found 1 match in | |
243 | * the cache) | |
dd453c4d MP |
244 | * - We never explore the cache, go right to exploring the backends |
245 | * We chose the latter : we explore directly the backends. | |
246 | */ | |
9462c471 | 247 | error = git_odb_read_prefix(&odb_obj, odb, &short_oid, len); |
5de079b8 VM |
248 | } |
249 | ||
3aa351ea | 250 | if (error < 0) |
282283ac | 251 | return error; |
5de079b8 | 252 | |
c6ac28fd | 253 | error = git_object__from_odb_object(object_out, repo, odb_obj, type); |
5de079b8 | 254 | |
45e79e37 | 255 | git_odb_object_free(odb_obj); |
72a3fe42 | 256 | |
c6ac28fd | 257 | return error; |
5de079b8 VM |
258 | } |
259 | ||
ac3d33df | 260 | int git_object_lookup(git_object **object_out, git_repository *repo, const git_oid *id, git_object_t type) { |
d0323a5f | 261 | return git_object_lookup_prefix(object_out, repo, id, GIT_OID_HEXSZ, type); |
dd453c4d MP |
262 | } |
263 | ||
45e79e37 | 264 | void git_object_free(git_object *object) |
48c27f86 VM |
265 | { |
266 | if (object == NULL) | |
267 | return; | |
268 | ||
5df18424 | 269 | git_cached_obj_decref(object); |
48c27f86 VM |
270 | } |
271 | ||
17cdf252 | 272 | const git_oid *git_object_id(const git_object *obj) |
e52ed7a5 | 273 | { |
c25aa7cd | 274 | GIT_ASSERT_ARG_WITH_RETVAL(obj, NULL); |
72a3fe42 | 275 | return &obj->cached.oid; |
e52ed7a5 VM |
276 | } |
277 | ||
ac3d33df | 278 | git_object_t git_object_type(const git_object *obj) |
e52ed7a5 | 279 | { |
c25aa7cd | 280 | GIT_ASSERT_ARG_WITH_RETVAL(obj, GIT_OBJECT_INVALID); |
cf7850a4 | 281 | return obj->cached.type; |
e52ed7a5 VM |
282 | } |
283 | ||
17cdf252 | 284 | git_repository *git_object_owner(const git_object *obj) |
e52ed7a5 | 285 | { |
c25aa7cd | 286 | GIT_ASSERT_ARG_WITH_RETVAL(obj, NULL); |
e52ed7a5 VM |
287 | return obj->repo; |
288 | } | |
289 | ||
ac3d33df | 290 | const char *git_object_type2string(git_object_t type) |
e52ed7a5 VM |
291 | { |
292 | if (type < 0 || ((size_t) type) >= ARRAY_SIZE(git_objects_table)) | |
293 | return ""; | |
294 | ||
295 | return git_objects_table[type].str; | |
296 | } | |
297 | ||
ac3d33df | 298 | git_object_t git_object_string2type(const char *str) |
eae0bfdc PP |
299 | { |
300 | if (!str) | |
ac3d33df | 301 | return GIT_OBJECT_INVALID; |
eae0bfdc PP |
302 | |
303 | return git_object_stringn2type(str, strlen(str)); | |
304 | } | |
305 | ||
ac3d33df | 306 | git_object_t git_object_stringn2type(const char *str, size_t len) |
e52ed7a5 VM |
307 | { |
308 | size_t i; | |
309 | ||
eae0bfdc | 310 | if (!str || !len || !*str) |
ac3d33df | 311 | return GIT_OBJECT_INVALID; |
e52ed7a5 VM |
312 | |
313 | for (i = 0; i < ARRAY_SIZE(git_objects_table); i++) | |
eae0bfdc PP |
314 | if (*git_objects_table[i].str && |
315 | !git__prefixncmp(str, len, git_objects_table[i].str)) | |
ac3d33df | 316 | return (git_object_t)i; |
e52ed7a5 | 317 | |
ac3d33df | 318 | return GIT_OBJECT_INVALID; |
e52ed7a5 VM |
319 | } |
320 | ||
ac3d33df | 321 | int git_object_typeisloose(git_object_t type) |
e52ed7a5 VM |
322 | { |
323 | if (type < 0 || ((size_t) type) >= ARRAY_SIZE(git_objects_table)) | |
324 | return 0; | |
325 | ||
78606263 | 326 | return (git_objects_table[type].size > 0) ? 1 : 0; |
e52ed7a5 VM |
327 | } |
328 | ||
ac3d33df | 329 | size_t git_object__size(git_object_t type) |
e52ed7a5 VM |
330 | { |
331 | if (type < 0 || ((size_t) type) >= ARRAY_SIZE(git_objects_table)) | |
332 | return 0; | |
333 | ||
334 | return git_objects_table[type].size; | |
335 | } | |
336 | ||
db9be945 | 337 | static int dereference_object(git_object **dereferenced, git_object *obj) |
338 | { | |
ac3d33df | 339 | git_object_t type = git_object_type(obj); |
db9be945 | 340 | |
341 | switch (type) { | |
ac3d33df | 342 | case GIT_OBJECT_COMMIT: |
db9be945 | 343 | return git_commit_tree((git_tree **)dereferenced, (git_commit*)obj); |
db9be945 | 344 | |
ac3d33df | 345 | case GIT_OBJECT_TAG: |
db9be945 | 346 | return git_tag_target(dereferenced, (git_tag*)obj); |
d8057a5b | 347 | |
ac3d33df JK |
348 | case GIT_OBJECT_BLOB: |
349 | case GIT_OBJECT_TREE: | |
753e17b0 | 350 | return GIT_EPEEL; |
db9be945 | 351 | |
352 | default: | |
bc05f30c | 353 | return GIT_EINVALIDSPEC; |
db9be945 | 354 | } |
355 | } | |
356 | ||
ac3d33df | 357 | static int peel_error(int error, const git_oid *oid, git_object_t type) |
bc05f30c | 358 | { |
359 | const char *type_name; | |
360 | char hex_oid[GIT_OID_HEXSZ + 1]; | |
361 | ||
362 | type_name = git_object_type2string(type); | |
363 | ||
364 | git_oid_fmt(hex_oid, oid); | |
365 | hex_oid[GIT_OID_HEXSZ] = '\0'; | |
366 | ||
ac3d33df JK |
367 | git_error_set(GIT_ERROR_OBJECT, "the git_object of id '%s' can not be " |
368 | "successfully peeled into a %s (git_object_t=%i).", hex_oid, type_name, type); | |
bc05f30c | 369 | |
370 | return error; | |
371 | } | |
372 | ||
ac3d33df | 373 | static int check_type_combination(git_object_t type, git_object_t target) |
753e17b0 CMN |
374 | { |
375 | if (type == target) | |
376 | return 0; | |
377 | ||
378 | switch (type) { | |
ac3d33df JK |
379 | case GIT_OBJECT_BLOB: |
380 | case GIT_OBJECT_TREE: | |
753e17b0 CMN |
381 | /* a blob or tree can never be peeled to anything but themselves */ |
382 | return GIT_EINVALIDSPEC; | |
383 | break; | |
ac3d33df | 384 | case GIT_OBJECT_COMMIT: |
753e17b0 | 385 | /* a commit can only be peeled to a tree */ |
ac3d33df | 386 | if (target != GIT_OBJECT_TREE && target != GIT_OBJECT_ANY) |
753e17b0 CMN |
387 | return GIT_EINVALIDSPEC; |
388 | break; | |
ac3d33df | 389 | case GIT_OBJECT_TAG: |
753e17b0 CMN |
390 | /* a tag may point to anything, so we let anything through */ |
391 | break; | |
392 | default: | |
393 | return GIT_EINVALIDSPEC; | |
394 | } | |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
db9be945 | 399 | int git_object_peel( |
d8057a5b | 400 | git_object **peeled, |
cfbe4be3 | 401 | const git_object *object, |
ac3d33df | 402 | git_object_t target_type) |
db9be945 | 403 | { |
404 | git_object *source, *deref = NULL; | |
bc05f30c | 405 | int error; |
406 | ||
c25aa7cd PP |
407 | GIT_ASSERT_ARG(object); |
408 | GIT_ASSERT_ARG(peeled); | |
db9be945 | 409 | |
c25aa7cd | 410 | GIT_ASSERT_ARG(target_type == GIT_OBJECT_TAG || |
ac3d33df JK |
411 | target_type == GIT_OBJECT_COMMIT || |
412 | target_type == GIT_OBJECT_TREE || | |
413 | target_type == GIT_OBJECT_BLOB || | |
414 | target_type == GIT_OBJECT_ANY); | |
8915a140 | 415 | |
753e17b0 CMN |
416 | if ((error = check_type_combination(git_object_type(object), target_type)) < 0) |
417 | return peel_error(error, git_object_id(object), target_type); | |
418 | ||
419 | if (git_object_type(object) == target_type) | |
420 | return git_object_dup(peeled, (git_object *)object); | |
421 | ||
cfbe4be3 | 422 | source = (git_object *)object; |
db9be945 | 423 | |
bc05f30c | 424 | while (!(error = dereference_object(&deref, source))) { |
db9be945 | 425 | |
426 | if (source != object) | |
427 | git_object_free(source); | |
428 | ||
429 | if (git_object_type(deref) == target_type) { | |
430 | *peeled = deref; | |
431 | return 0; | |
432 | } | |
433 | ||
ac3d33df | 434 | if (target_type == GIT_OBJECT_ANY && |
d8057a5b RB |
435 | git_object_type(deref) != git_object_type(object)) |
436 | { | |
437 | *peeled = deref; | |
438 | return 0; | |
439 | } | |
440 | ||
db9be945 | 441 | source = deref; |
442 | deref = NULL; | |
443 | } | |
444 | ||
db9be945 | 445 | if (source != object) |
446 | git_object_free(source); | |
d8057a5b | 447 | |
db9be945 | 448 | git_object_free(deref); |
bc05f30c | 449 | |
450 | if (error) | |
451 | error = peel_error(error, git_object_id(object), target_type); | |
452 | ||
453 | return error; | |
db9be945 | 454 | } |
613d5eb9 | 455 | |
575a54db VM |
456 | int git_object_dup(git_object **dest, git_object *source) |
457 | { | |
458 | git_cached_obj_incref(source); | |
459 | *dest = source; | |
460 | return 0; | |
461 | } | |
ceab4e26 BS |
462 | |
463 | int git_object_lookup_bypath( | |
464 | git_object **out, | |
465 | const git_object *treeish, | |
466 | const char *path, | |
ac3d33df | 467 | git_object_t type) |
ceab4e26 BS |
468 | { |
469 | int error = -1; | |
470 | git_tree *tree = NULL; | |
471 | git_tree_entry *entry = NULL; | |
ceab4e26 | 472 | |
c25aa7cd PP |
473 | GIT_ASSERT_ARG(out); |
474 | GIT_ASSERT_ARG(treeish); | |
475 | GIT_ASSERT_ARG(path); | |
ceab4e26 | 476 | |
ac3d33df | 477 | if ((error = git_object_peel((git_object**)&tree, treeish, GIT_OBJECT_TREE)) < 0 || |
ba02079f | 478 | (error = git_tree_entry_bypath(&entry, tree, path)) < 0) |
ceab4e26 BS |
479 | { |
480 | goto cleanup; | |
481 | } | |
482 | ||
ac3d33df | 483 | if (type != GIT_OBJECT_ANY && git_tree_entry_type(entry) != type) |
ba02079f | 484 | { |
ac3d33df | 485 | git_error_set(GIT_ERROR_OBJECT, |
ceab4e26 BS |
486 | "object at path '%s' is not of the asked-for type %d", |
487 | path, type); | |
488 | error = GIT_EINVALIDSPEC; | |
ba02079f | 489 | goto cleanup; |
ceab4e26 BS |
490 | } |
491 | ||
ba02079f BS |
492 | error = git_tree_entry_to_object(out, git_object_owner(treeish), entry); |
493 | ||
ceab4e26 BS |
494 | cleanup: |
495 | git_tree_entry_free(entry); | |
496 | git_tree_free(tree); | |
497 | return error; | |
498 | } | |
13f7ecd7 | 499 | |
e579e0f7 | 500 | static int git_object__short_id(git_str *out, const git_object *obj) |
13f7ecd7 RB |
501 | { |
502 | git_repository *repo; | |
503 | int len = GIT_ABBREV_DEFAULT, error; | |
504 | git_oid id = {{0}}; | |
505 | git_odb *odb; | |
506 | ||
c25aa7cd PP |
507 | GIT_ASSERT_ARG(out); |
508 | GIT_ASSERT_ARG(obj); | |
509 | ||
13f7ecd7 RB |
510 | repo = git_object_owner(obj); |
511 | ||
22a2d3d5 | 512 | if ((error = git_repository__configmap_lookup(&len, repo, GIT_CONFIGMAP_ABBREV)) < 0) |
13f7ecd7 RB |
513 | return error; |
514 | ||
515 | if ((error = git_repository_odb(&odb, repo)) < 0) | |
516 | return error; | |
517 | ||
518 | while (len < GIT_OID_HEXSZ) { | |
519 | /* set up short oid */ | |
520 | memcpy(&id.id, &obj->cached.oid.id, (len + 1) / 2); | |
521 | if (len & 1) | |
522 | id.id[len / 2] &= 0xf0; | |
523 | ||
524 | error = git_odb_exists_prefix(NULL, odb, &id, len); | |
525 | if (error != GIT_EAMBIGUOUS) | |
526 | break; | |
527 | ||
ac3d33df | 528 | git_error_clear(); |
13f7ecd7 RB |
529 | len++; |
530 | } | |
531 | ||
e579e0f7 | 532 | if (!error && !(error = git_str_grow(out, len + 1))) { |
13f7ecd7 RB |
533 | git_oid_tostr(out->ptr, len + 1, &id); |
534 | out->size = len; | |
535 | } | |
536 | ||
537 | git_odb_free(odb); | |
538 | ||
539 | return error; | |
540 | } | |
541 | ||
e579e0f7 MB |
542 | int git_object_short_id(git_buf *out, const git_object *obj) |
543 | { | |
544 | GIT_BUF_WRAP_PRIVATE(out, git_object__short_id, obj); | |
545 | } | |
546 | ||
3ef01e77 | 547 | bool git_object__is_valid( |
ac3d33df | 548 | git_repository *repo, const git_oid *id, git_object_t expected_type) |
3ef01e77 ET |
549 | { |
550 | git_odb *odb; | |
ac3d33df | 551 | git_object_t actual_type; |
3ef01e77 ET |
552 | size_t len; |
553 | int error; | |
554 | ||
555 | if (!git_object__strict_input_validation) | |
556 | return true; | |
557 | ||
558 | if ((error = git_repository_odb__weakptr(&odb, repo)) < 0 || | |
559 | (error = git_odb_read_header(&len, &actual_type, odb, id)) < 0) | |
560 | return false; | |
561 | ||
ac3d33df JK |
562 | if (expected_type != GIT_OBJECT_ANY && expected_type != actual_type) { |
563 | git_error_set(GIT_ERROR_INVALID, | |
3ef01e77 ET |
564 | "the requested type does not match the type in the ODB"); |
565 | return false; | |
566 | } | |
567 | ||
568 | return true; | |
569 | } | |
e579e0f7 MB |
570 | |
571 | int git_object_rawcontent_is_valid( | |
572 | int *valid, | |
573 | const char *buf, | |
574 | size_t len, | |
575 | git_object_t type) | |
576 | { | |
577 | git_object *obj = NULL; | |
578 | int error; | |
579 | ||
580 | GIT_ASSERT_ARG(valid); | |
581 | GIT_ASSERT_ARG(buf); | |
582 | ||
583 | /* Blobs are always valid; don't bother parsing. */ | |
584 | if (type == GIT_OBJECT_BLOB) { | |
585 | *valid = 1; | |
586 | return 0; | |
587 | } | |
588 | ||
589 | error = git_object__from_raw(&obj, buf, len, type); | |
590 | git_object_free(obj); | |
591 | ||
592 | if (error == 0) { | |
593 | *valid = 1; | |
594 | return 0; | |
595 | } else if (error == GIT_EINVALID) { | |
596 | *valid = 0; | |
597 | return 0; | |
598 | } | |
599 | ||
600 | return error; | |
601 | } |