Introduce diff_filespec_is_binary()
[git/git.git] / diffcore.h
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1/*
2 * Copyright (C) 2005 Junio C Hamano
3 */
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4#ifndef DIFFCORE_H
5#define DIFFCORE_H
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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 */
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11
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
16 * for break).
17 */
ee3d299e 18#define MAX_SCORE 60000.0
f345b0a0 19#define DEFAULT_RENAME_SCORE 30000 /* rename/copy similarity minimum (50%) */
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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%) */
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22
23#define MINIMUM_BREAK_SIZE 400 /* do not break a file smaller than this */
427dcb4b 24
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25struct diff_filespec {
26 unsigned char sha1[20];
27 char *path;
28 void *data;
c06c7966 29 void *cnt_data;
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30 unsigned long size;
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
35 * the filesystem.
36 */
dc7090ef 37#define DIFF_FILE_VALID(spec) (((spec)->mode) != 0)
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38 unsigned should_free : 1; /* data should be free()'ed */
39 unsigned should_munmap : 1; /* data should be munmap()'ed */
29a3eefd 40 unsigned checked_attr : 1;
706098af 41 unsigned is_binary : 1; /* data should be considered "binary" */
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42};
43
44extern struct diff_filespec *alloc_filespec(const char *);
45extern void fill_filespec(struct diff_filespec *, const unsigned char *,
46 unsigned short);
47
f0c6b2a2 48extern int diff_populate_filespec(struct diff_filespec *, int);
19397b45 49extern void diff_free_filespec_data(struct diff_filespec *);
29a3eefd 50extern int diff_filespec_is_binary(struct diff_filespec *);
427dcb4b 51
52e95789 52struct diff_filepair {
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53 struct diff_filespec *one;
54 struct diff_filespec *two;
01c4e70f 55 unsigned short int score;
15d061b4 56 char status; /* M C R N D U (see Documentation/diff-format.txt) */
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57 unsigned source_stays : 1; /* all of R/C are copies */
58 unsigned broken_pair : 1;
ef677686 59 unsigned renamed_pair : 1;
e9c84099 60 unsigned is_unmerged : 1;
427dcb4b 61};
e9c84099 62#define DIFF_PAIR_UNMERGED(p) ((p)->is_unmerged)
427dcb4b 63
ef677686 64#define DIFF_PAIR_RENAME(p) ((p)->renamed_pair)
01c4e70f 65
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66#define DIFF_PAIR_BROKEN(p) \
67 ( (!DIFF_FILE_VALID((p)->one) != !DIFF_FILE_VALID((p)->two)) && \
68 ((p)->broken_pair != 0) )
69
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70#define DIFF_PAIR_TYPE_CHANGED(p) \
71 ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode))
72
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73#define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode)
74
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75extern void diff_free_filepair(struct diff_filepair *);
76
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77extern int diff_unmodified_pair(struct diff_filepair *);
78
427dcb4b 79struct diff_queue_struct {
52e95789 80 struct diff_filepair **queue;
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81 int alloc;
82 int nr;
83};
84
38c6f780 85extern struct diff_queue_struct diff_queued_diff;
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86extern struct diff_filepair *diff_queue(struct diff_queue_struct *,
87 struct diff_filespec *,
88 struct diff_filespec *);
6b14d7fa 89extern void diff_q(struct diff_queue_struct *, struct diff_filepair *);
f7c1512a 90
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91extern void diffcore_pathspec(const char **pathspec);
92extern void diffcore_break(int);
8082d8d3 93extern void diffcore_rename(struct diff_options *);
eeaa4603 94extern void diffcore_merge_broken(void);
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95extern void diffcore_pickaxe(const char *needle, int opts);
96extern void diffcore_order(const char *orderfile);
97
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98#define DIFF_DEBUG 0
99#if DIFF_DEBUG
100void diff_debug_filespec(struct diff_filespec *, int, const char *);
101void diff_debug_filepair(const struct diff_filepair *, int);
102void diff_debug_queue(const char *, struct diff_queue_struct *);
103#else
104#define diff_debug_filespec(a,b,c) do {} while(0)
105#define diff_debug_filepair(a,b) do {} while(0)
106#define diff_debug_queue(a,b) do {} while(0)
107#endif
108
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109extern int diffcore_count_changes(struct diff_filespec *src,
110 struct diff_filespec *dst,
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111 void **src_count_p,
112 void **dst_count_p,
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113 unsigned long delta_limit,
114 unsigned long *src_copied,
115 unsigned long *literal_added);
116
427dcb4b 117#endif