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 /*
18  * Compute the differences between two blobs and write unified diff text
19  * to the provided output FILE. Two const char * diff header labels may
20  * be provided which will be used to identify each blob in the diff output.
21  * If a label is NULL, use the blob's SHA1 checksum instead.
22  * The number of context lines to show in the diff must be specified as well.
23  */
24 const struct got_error *got_diff_blob(struct got_blob_object *,
25     struct got_blob_object *, const char *, const char *, int, FILE *);
26 
27 /*
28  * Compute the differences between a blob and a file and write unified diff
29  * text to the provided output file. The file's size must be provided, as
30  * well as a const char * diff header label which identifies the file.
31  * The number of context lines to show in the diff must be specified as well.
32  */
33 const struct got_error *
34 got_diff_blob_file(struct got_blob_object *, FILE *, size_t, const char *, int,
35     FILE *);
36 
37 /*
38  * Compute the differences between two trees and write unified diff text
39  * to the provided output FILE. Two const char * diff header labels may
40  * be provided which will be used to identify each blob in the diff output.
41  * If a label is NULL, use the blob's SHA1 checksum instead.
42  * The number of context lines to show in the diff must be specified as well.
43  */
44 const struct got_error *got_diff_tree(struct got_tree_object *,
45     struct got_tree_object *, const char *label1, const char *label2,
46     int, struct got_repository *, FILE *);
47 
48 /*
49  * Diff two objects, assuming both objects are blobs. Two const char * diff
50  * header labels may be provided which will be used to identify each blob in
51  * the diff output. If a label is NULL, use the blob's SHA1 checksum instead.
52  * The number of context lines to show in the diff must be specified as well.
53  * Write unified diff text to the provided output FILE.
54  */
55 const struct got_error *got_diff_objects_as_blobs(struct got_object_id *,
56     struct got_object_id *, const char *, const char *, int,
57     struct got_repository *, FILE *);
58 
59 /*
60  * Diff two objects, assuming both objects are trees. Two const char * diff
61  * header labels may be provided which will be used to identify each blob in
62  * the trees. If a label is NULL, use the blob's SHA1 checksum instead.
63  * The number of context lines to show in diffs must be specified.
64  * Write unified diff text to the provided output FILE.
65  */
66 const struct got_error *got_diff_objects_as_trees(struct got_object_id *,
67     struct got_object_id *, char *, char *, int, struct got_repository *, FILE *);
68 
69 /*
70  * Diff two objects, assuming both objects are commits.
71  * The number of context lines to show in diffs must be specified.
72  * Write unified diff text to the provided output FILE.
73  */
74 const struct got_error *got_diff_objects_as_commits(struct got_object_id *,
75     struct got_object_id *, int, struct got_repository *, FILE *);
76 
77 #define GOT_DIFF_MAX_CONTEXT	64