2 * Copyright (C) 2005 Junio C Hamano
7 /* This header file is internal between diff.c and its diff transformers
8 * (e.g. diffcore-rename, diffcore-pickaxe). Never include this header
12 /* We internally use unsigned short as the score value,
13 * and rely on an int capable to hold 32-bits. -B can take
14 * -Bmerge_score/break_score format and the two scores are
15 * passed around in one int (high 16-bit for merge and low 16-bit
18 #define MAX_SCORE 60000.0
19 #define DEFAULT_RENAME_SCORE 30000 /* rename/copy similarity minimum (50%) */
20 #define DEFAULT_BREAK_SCORE 30000 /* minimum for break to happen (50%) */
21 #define DEFAULT_MERGE_SCORE 36000 /* maximum for break-merge to happen 60%) */
23 #define MINIMUM_BREAK_SIZE 400 /* do not break a file smaller than this */
25 struct diff_filespec
{
26 unsigned char sha1
[20];
31 int xfrm_flags
; /* for use by the xfrm */
32 unsigned short mode
; /* file mode */
33 unsigned sha1_valid
: 1; /* if true, use sha1 and trust mode;
34 * if false, use the name and read from
37 #define DIFF_FILE_VALID(spec) (((spec)->mode) != 0)
38 unsigned should_free
: 1; /* data should be free()'ed */
39 unsigned should_munmap
: 1; /* data should be munmap()'ed */
40 unsigned is_binary
: 1; /* data should be considered "binary" */
43 extern struct diff_filespec
*alloc_filespec(const char *);
44 extern void fill_filespec(struct diff_filespec
*, const unsigned char *,
47 extern int diff_populate_filespec(struct diff_filespec
*, int);
48 extern void diff_free_filespec_data(struct diff_filespec
*);
50 struct diff_filepair
{
51 struct diff_filespec
*one
;
52 struct diff_filespec
*two
;
53 unsigned short int score
;
54 char status
; /* M C R N D U (see Documentation/diff-format.txt) */
55 unsigned source_stays
: 1; /* all of R/C are copies */
56 unsigned broken_pair
: 1;
57 unsigned renamed_pair
: 1;
58 unsigned is_unmerged
: 1;
60 #define DIFF_PAIR_UNMERGED(p) ((p)->is_unmerged)
62 #define DIFF_PAIR_RENAME(p) ((p)->renamed_pair)
64 #define DIFF_PAIR_BROKEN(p) \
65 ( (!DIFF_FILE_VALID((p)->one) != !DIFF_FILE_VALID((p)->two)) && \
66 ((p)->broken_pair != 0) )
68 #define DIFF_PAIR_TYPE_CHANGED(p) \
69 ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode))
71 #define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode)
73 extern void diff_free_filepair(struct diff_filepair
*);
75 extern int diff_unmodified_pair(struct diff_filepair
*);
77 struct diff_queue_struct
{
78 struct diff_filepair
**queue
;
83 extern struct diff_queue_struct diff_queued_diff
;
84 extern struct diff_filepair
*diff_queue(struct diff_queue_struct
*,
85 struct diff_filespec
*,
86 struct diff_filespec
*);
87 extern void diff_q(struct diff_queue_struct
*, struct diff_filepair
*);
89 extern void diffcore_pathspec(const char **pathspec
);
90 extern void diffcore_break(int);
91 extern void diffcore_rename(struct diff_options
*);
92 extern void diffcore_merge_broken(void);
93 extern void diffcore_pickaxe(const char *needle
, int opts
);
94 extern void diffcore_order(const char *orderfile
);
98 void diff_debug_filespec(struct diff_filespec
*, int, const char *);
99 void diff_debug_filepair(const struct diff_filepair
*, int);
100 void diff_debug_queue(const char *, struct diff_queue_struct
*);
102 #define diff_debug_filespec(a,b,c) do {} while(0)
103 #define diff_debug_filepair(a,b) do {} while(0)
104 #define diff_debug_queue(a,b) do {} while(0)
107 extern int diffcore_count_changes(struct diff_filespec
*src
,
108 struct diff_filespec
*dst
,
111 unsigned long delta_limit
,
112 unsigned long *src_copied
,
113 unsigned long *literal_added
);