1 /*
2 * Copyright (C) the libgit2 contributors. All rights reserved.
3 *
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.
6 */
7 #ifndef INCLUDE_diff_generate_h__
8 #define INCLUDE_diff_generate_h__
9
10 #include "common.h"
11
12 #include "diff.h"
13 #include "pool.h"
14 #include "index.h"
15
16 enum {
17 GIT_DIFFCAPS_HAS_SYMLINKS = (1 << 0), /* symlinks on platform? */
18 GIT_DIFFCAPS_IGNORE_STAT = (1 << 1), /* use stat? */
19 GIT_DIFFCAPS_TRUST_MODE_BITS = (1 << 2), /* use st_mode? */
20 GIT_DIFFCAPS_TRUST_CTIME = (1 << 3), /* use st_ctime? */
21 GIT_DIFFCAPS_USE_DEV = (1 << 4), /* use st_dev? */
22 };
23
24 #define DIFF_FLAGS_KNOWN_BINARY (GIT_DIFF_FLAG_BINARY|GIT_DIFF_FLAG_NOT_BINARY)
25 #define DIFF_FLAGS_NOT_BINARY (GIT_DIFF_FLAG_NOT_BINARY|GIT_DIFF_FLAG__NO_DATA)
26
27 enum {
28 GIT_DIFF_FLAG__FREE_PATH = (1 << 7), /* `path` is allocated memory */
29 GIT_DIFF_FLAG__FREE_DATA = (1 << 8), /* internal file data is allocated */
30 GIT_DIFF_FLAG__UNMAP_DATA = (1 << 9), /* internal file data is mmap'ed */
31 GIT_DIFF_FLAG__NO_DATA = (1 << 10), /* file data should not be loaded */
32 GIT_DIFF_FLAG__FREE_BLOB = (1 << 11), /* release the blob when done */
33 GIT_DIFF_FLAG__LOADED = (1 << 12), /* file data has been loaded */
34
35 GIT_DIFF_FLAG__TO_DELETE = (1 << 16), /* delete entry during rename det. */
36 GIT_DIFF_FLAG__TO_SPLIT = (1 << 17), /* split entry during rename det. */
37 GIT_DIFF_FLAG__IS_RENAME_TARGET = (1 << 18),
38 GIT_DIFF_FLAG__IS_RENAME_SOURCE = (1 << 19),
39 GIT_DIFF_FLAG__HAS_SELF_SIMILARITY = (1 << 20),
40 };
41
42 #define GIT_DIFF_FLAG__CLEAR_INTERNAL(F) (F) = ((F) & 0x00FFFF)
43
44 #define GIT_DIFF__VERBOSE (1 << 30)
45
46 extern void git_diff_addref(git_diff *diff);
47
48 extern bool git_diff_delta__should_skip(
49 const git_diff_options *opts, const git_diff_delta *delta);
50
51 extern int git_diff__from_iterators(
52 git_diff **diff_ptr,
53 git_repository *repo,
54 git_iterator *old_iter,
55 git_iterator *new_iter,
56 const git_diff_options *opts);
57
58 extern int git_diff__commit(
59 git_diff **diff, git_repository *repo, const git_commit *commit, const git_diff_options *opts);
60
61 extern int git_diff__paired_foreach(
62 git_diff *idx2head,
63 git_diff *wd2idx,
64 int (*cb)(git_diff_delta *i2h, git_diff_delta *w2i, void *payload),
65 void *payload);
66
67 /* Merge two `git_diff`s according to the callback given by `cb`. */
68
69 typedef git_diff_delta *(*git_diff__merge_cb)(
70 const git_diff_delta *left,
71 const git_diff_delta *right,
72 git_pool *pool);
73
74 extern int git_diff__merge(
75 git_diff *onto, const git_diff *from, git_diff__merge_cb cb);
76
77 extern git_diff_delta *git_diff__merge_like_cgit(
78 const git_diff_delta *a,
79 const git_diff_delta *b,
80 git_pool *pool);
81
82 /* Duplicate a `git_diff_delta` out of the `git_pool` */
83 extern git_diff_delta *git_diff__delta_dup(
84 const git_diff_delta *d, git_pool *pool);
85
86 extern int git_diff__oid_for_file(
87 git_oid *out,
88 git_diff *diff,
89 const char *path,
90 uint16_t mode,
91 git_object_size_t size);
92
93 extern int git_diff__oid_for_entry(
94 git_oid *out,
95 git_diff *diff,
96 const git_index_entry *src,
97 uint16_t mode,
98 const git_oid *update_match);
99
100 /*
101 * Sometimes a git_diff_file will have a zero size; this attempts to
102 * fill in the size without loading the blob if possible. If that is
103 * not possible, then it will return the git_odb_object that had to be
104 * loaded and the caller can use it or dispose of it as needed.
105 */
git_diff_file__resolve_zero_size(git_diff_file * file,git_odb_object ** odb_obj,git_repository * repo)106 GIT_INLINE(int) git_diff_file__resolve_zero_size(
107 git_diff_file *file, git_odb_object **odb_obj, git_repository *repo)
108 {
109 int error;
110 git_odb *odb;
111 size_t len;
112 git_object_t type;
113
114 if ((error = git_repository_odb(&odb, repo)) < 0)
115 return error;
116
117 error = git_odb__read_header_or_object(
118 odb_obj, &len, &type, odb, &file->id);
119
120 git_odb_free(odb);
121
122 if (!error)
123 file->size = (git_object_size_t)len;
124
125 return error;
126 }
127
128 #endif
129