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1 | /* |
2 | * All rights reserved. | |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or | |
5 | * without modification, are permitted provided that the following | |
6 | * conditions are met: | |
7 | * | |
8 | * - Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * | |
11 | * - Redistributions in binary form must reproduce the above | |
12 | * copyright notice, this list of conditions and the following | |
13 | * disclaimer in the documentation and/or other materials provided | |
14 | * with the distribution. | |
15 | * | |
16 | * - Neither the name of the Git Development Community nor the | |
17 | * names of its contributors may be used to endorse or promote | |
18 | * products derived from this software without specific prior | |
19 | * written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND | |
22 | * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, | |
23 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
24 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |
26 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
27 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
28 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
29 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
30 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
31 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
32 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
33 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
34 | */ | |
35 | ||
36 | #ifndef INCLUDE_git_odb_h__ | |
37 | #define INCLUDE_git_odb_h__ | |
38 | ||
39 | #include "git_common.h" | |
40 | #include "git_oid.h" | |
41 | #include <unistd.h> | |
42 | ||
43 | /** | |
44 | * @file git_odb.h | |
45 | * @brief Git object database routines | |
46 | * @defgroup git_odb Git object database routines | |
47 | * @ingroup Git | |
48 | * @{ | |
49 | */ | |
50 | GIT_BEGIN_DECL | |
51 | ||
52 | /** An open object database handle. */ | |
53 | typedef struct git_odb { | |
54 | /** Path to the "objects" directory. */ | |
55 | const char *path; | |
56 | ||
57 | /** Alternate databases to search. */ | |
58 | struct git_odb **alternates; | |
59 | ||
60 | /** Number of alternates available. */ | |
61 | unsigned n_alternates; | |
62 | } git_odb; | |
63 | ||
64 | /** | |
65 | * Open an object database for read/write access. | |
66 | * @param out location to store the database pointer, if opened. | |
67 | * Set to NULL if the open failed. | |
68 | * @param objects_dir path of the database's "objects" directory. | |
69 | * @return GIT_SUCCESS if the database opened; otherwise an error | |
70 | * code describing why the open was not possible. | |
71 | */ | |
72 | GIT_EXTERN(git_result) git_odb_open(git_odb **out, const char *objects_dir); | |
73 | ||
74 | /** | |
75 | * Close an open object database. | |
76 | * @param db database pointer to close. If NULL no action is taken. | |
77 | * The pointer is set to NULL when the close is completed. | |
78 | */ | |
79 | GIT_EXTERN(void) git_odb_close(git_odb** db); | |
80 | ||
81 | /** Basic type (loose or packed) of any Git object. */ | |
82 | typedef enum { | |
83 | OBJ_BAD = -1, /**< Object is invalid. */ | |
84 | OBJ__EXT1 = 0, /**< Reserved for future use. */ | |
85 | OBJ_COMMIT = 1, /**< A commit object. */ | |
86 | OBJ_TREE = 2, /**< A tree (directory listing) object. */ | |
87 | OBJ_BLOB = 3, /**< A file revision object. */ | |
88 | OBJ_TAG = 4, /**< An annotated tag object. */ | |
89 | OBJ__EXT2 = 5, /**< Reserved for future use. */ | |
90 | OBJ_OFS_DELTA = 6, /**< A delta, base is given by an offset. */ | |
91 | OBJ_REF_DELTA = 7, /**< A delta, base is given by object id. */ | |
92 | } git_otype; | |
93 | ||
94 | /** A small object read from the database. */ | |
95 | typedef struct { | |
96 | void *data; /**< Raw, decompressed object data. */ | |
97 | size_t len; /**< Total number of bytes in data. */ | |
98 | git_otype type; /**< Type of this object. */ | |
99 | } git_sobj; | |
100 | ||
101 | /** | |
102 | * Read a small object from the database. | |
103 | * @param out object descriptor to populate upon reading. | |
104 | * @param db database to search for the object in. | |
105 | * @param id identity of the object to read. | |
106 | * @return GIT_SUCCESS if the object was read; | |
107 | * GIT_ENOTFOUND if the object is not in the database. | |
108 | */ | |
46d8b885 | 109 | GIT_EXTERN(git_result) git_odb_read(git_sobj *out, git_odb *db, const git_oid *id); |
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110 | |
111 | /** | |
112 | * Read a small object from the database using only pack files. | |
113 | * @param out object descriptor to populate upon reading. | |
114 | * @param db database to search for the object in. | |
115 | * @param id identity of the object to read. | |
116 | * @return GIT_SUCCESS if the object was read; | |
117 | * GIT_ENOTFOUND if the object is not in the database. | |
118 | */ | |
46d8b885 | 119 | GIT_EXTERN(git_result) git_odb__read_packed(git_sobj *out, git_odb *db, const git_oid *id); |
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120 | |
121 | /** | |
122 | * Read a small object from the database using only loose object files. | |
123 | * @param out object descriptor to populate upon reading. | |
124 | * @param db database to search for the object in. | |
125 | * @param id identity of the object to read. | |
126 | * @return GIT_SUCCESS if the object was read; | |
127 | * GIT_ENOTFOUND if the object is not in the database. | |
128 | */ | |
46d8b885 | 129 | GIT_EXTERN(git_result) git_odb__read_loose(git_sobj *out, git_odb *db, const git_oid *id); |
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130 | |
131 | /** @} */ | |
132 | GIT_END_DECL | |
133 | #endif |