1 /*
2  * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 struct got_zstream_buf {
18 	z_stream z;
19 	char *inbuf;
20 	size_t inlen;
21 	char *outbuf;
22 	size_t outlen;
23 	int flags;
24 #define GOT_ZSTREAM_F_HAVE_MORE 0x01
25 };
26 
27 struct got_object_id {
28 	u_int8_t sha1[SHA1_DIGEST_LENGTH];
29 };
30 
31 struct got_blob_object {
32 	FILE *f;
33 	struct got_zstream_buf zb;
34 	size_t hdrlen;
35 	size_t blocksize;
36 	uint8_t *read_buf;
37 	int flags;
38 #define GOT_BLOB_F_COMPRESSED	0x01
39 	struct got_object_id id;
40 };
41 
42 struct got_tree_entry {
43 	SIMPLEQ_ENTRY(got_tree_entry) entry;
44 	mode_t mode;
45 	char *name;
46 	struct got_object_id id;
47 };
48 
49 struct got_tree_object {
50 	int nentries;
51 	SIMPLEQ_HEAD(, got_tree_entry) entries;
52 };
53 
54 struct got_parent_id {
55 	SIMPLEQ_ENTRY(got_parent_id) entry;
56 	struct got_object_id id;
57 };
58 
59 SIMPLEQ_HEAD(got_parent_id_list, got_parent_id);
60 
61 struct got_commit_object {
62 	struct got_object_id tree_id;
63 	unsigned int nparents;
64 	SIMPLEQ_HEAD(, got_parent_id) parent_ids;
65 	char *author;
66 	char *committer;
67 	char *logmsg;
68 };
69 
70 struct got_object;
71 #define GOT_OBJ_TYPE_COMMIT		1
72 #define GOT_OBJ_TYPE_TREE		2
73 #define GOT_OBJ_TYPE_BLOB		3
74 #define GOT_OBJ_TYPE_TAG		4
75 /* 5 is reserved */
76 #define GOT_OBJ_TYPE_OFFSET_DELTA	6
77 #define GOT_OBJ_TYPE_REF_DELTA		7
78 
79 struct got_repository;
80 
81 char *got_object_id_str(struct got_object_id *, char *, size_t);
82 int got_object_id_cmp(struct got_object_id *, struct got_object_id *);
83 int got_object_get_type(struct got_object *);
84 const struct got_error *got_object_open(struct got_object **,
85     struct got_repository *, struct got_object_id *);
86 void got_object_close(struct got_object *);
87 const struct got_error *got_object_commit_open(struct got_commit_object **,
88     struct got_repository *, struct got_object *);
89 void got_object_commit_close(struct got_commit_object *);
90 const struct got_error *got_object_tree_open(struct got_tree_object **,
91     struct got_repository *, struct got_object *);
92 void got_object_tree_close(struct got_tree_object *);
93 const struct got_error *got_object_blob_open(struct got_blob_object **,
94     struct got_repository *, struct got_object *, size_t);
95 void got_object_blob_close(struct got_blob_object *);
96 const struct got_error *got_object_blob_read_block(size_t *,
97     struct got_blob_object *);