[PATCH] Prepare diffcore interface for diff-tree header supression.
[git/git.git] / diffcore.h
1 /*
2 * Copyright (C) 2005 Junio C Hamano
3 */
4 #ifndef _DIFFCORE_H_
5 #define _DIFFCORE_H_
6
7 /* This header file is internal between diff.c and its diff transformers
8 * (e.g. diffcore-rename, diffcore-pickaxe). Never include this header
9 * in anything else.
10 */
11 #define MAX_SCORE 10000
12 #define DEFAULT_MINIMUM_SCORE 5000
13
14 #define RENAME_DST_MATCHED 01
15 #define RENAME_SRC_GONE 02
16 #define RENAME_SCORE_SHIFT 8
17
18 struct diff_filespec {
19 unsigned char sha1[20];
20 char *path;
21 void *data;
22 unsigned long size;
23 int xfrm_flags; /* for use by the xfrm */
24 unsigned short mode; /* file mode */
25 unsigned sha1_valid : 1; /* if true, use sha1 and trust mode;
26 * if false, use the name and read from
27 * the filesystem.
28 */
29 unsigned file_valid : 1; /* if false the file does not exist */
30 unsigned should_free : 1; /* data should be free()'ed */
31 unsigned should_munmap : 1; /* data should be munmap()'ed */
32 };
33
34 extern struct diff_filespec *alloc_filespec(const char *);
35 extern void fill_filespec(struct diff_filespec *, const unsigned char *,
36 unsigned short);
37
38 extern int diff_populate_filespec(struct diff_filespec *);
39 extern void diff_free_filespec_data(struct diff_filespec *);
40
41 struct diff_filepair {
42 struct diff_filespec *one;
43 struct diff_filespec *two;
44 char *xfrm_msg;
45 int orig_order; /* the original order of insertion into the queue */
46 int xfrm_work; /* for use by tramsformers, not by diffcore */
47 };
48
49 struct diff_queue_struct {
50 struct diff_filepair **queue;
51 int alloc;
52 int nr;
53 };
54
55 extern struct diff_queue_struct diff_queued_diff;
56 extern struct diff_filepair *diff_queue(struct diff_queue_struct *,
57 struct diff_filespec *,
58 struct diff_filespec *);
59
60 #endif