Merge branch 'rs/simplify-by-deco-with-deco-refs-exclude'
[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
427dcb4b 6
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7#include "cache.h"
8
9struct diff_options;
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10struct repository;
11struct userdiff_driver;
ef3ca954 12
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13/* This header file is internal between diff.c and its diff transformers
14 * (e.g. diffcore-rename, diffcore-pickaxe). Never include this header
15 * in anything else.
16 */
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17
18/* We internally use unsigned short as the score value,
19 * and rely on an int capable to hold 32-bits. -B can take
20 * -Bmerge_score/break_score format and the two scores are
21 * passed around in one int (high 16-bit for merge and low 16-bit
22 * for break).
23 */
ee3d299e 24#define MAX_SCORE 60000.0
f345b0a0 25#define DEFAULT_RENAME_SCORE 30000 /* rename/copy similarity minimum (50%) */
4d0f39ce 26#define DEFAULT_BREAK_SCORE 30000 /* minimum for break to happen (50%) */
cf958afd 27#define DEFAULT_MERGE_SCORE 36000 /* maximum for break-merge to happen (60%) */
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28
29#define MINIMUM_BREAK_SIZE 400 /* do not break a file smaller than this */
427dcb4b 30
427dcb4b 31struct diff_filespec {
a0d12c44 32 struct object_id oid;
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33 char *path;
34 void *data;
c06c7966 35 void *cnt_data;
427dcb4b 36 unsigned long size;
9fb88419 37 int count; /* Reference count */
64479711 38 int rename_used; /* Count of rename users */
427dcb4b 39 unsigned short mode; /* file mode */
41c9560e 40 unsigned oid_valid : 1; /* if true, use oid and trust mode;
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41 * if false, use the name and read from
42 * the filesystem.
43 */
dc7090ef 44#define DIFF_FILE_VALID(spec) (((spec)->mode) != 0)
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45 unsigned should_free : 1; /* data should be free()'ed */
46 unsigned should_munmap : 1; /* data should be munmap()'ed */
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47 unsigned dirty_submodule : 2; /* For submodules: its work tree is dirty */
48#define DIRTY_SUBMODULE_UNTRACKED 1
49#define DIRTY_SUBMODULE_MODIFIED 2
b837f5d6 50 unsigned is_stdin : 1;
25e5e2bf 51 unsigned has_more_entries : 1; /* only appear in combined diff */
122aa6f9 52 /* data should be considered "binary"; -1 means "don't know yet" */
7d0a9a75 53 signed int is_binary : 2;
b38f70a8 54 struct userdiff_driver *driver;
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55};
56
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57struct diff_filespec *alloc_filespec(const char *);
58void free_filespec(struct diff_filespec *);
59void fill_filespec(struct diff_filespec *, const struct object_id *,
60 int, unsigned short);
427dcb4b 61
8e5dd3d6 62#define CHECK_SIZE_ONLY 1
6bf3b813 63#define CHECK_BINARY 2
b78ea5fc 64int diff_populate_filespec(struct repository *, struct diff_filespec *, unsigned int);
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65void diff_free_filespec_data(struct diff_filespec *);
66void diff_free_filespec_blob(struct diff_filespec *);
b78ea5fc 67int diff_filespec_is_binary(struct repository *, struct diff_filespec *);
427dcb4b 68
52e95789 69struct diff_filepair {
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70 struct diff_filespec *one;
71 struct diff_filespec *two;
01c4e70f 72 unsigned short int score;
a5a323f3 73 char status; /* M C R A D U etc. (see Documentation/diff-format.txt or DIFF_STATUS_* in diff.h) */
f345b0a0 74 unsigned broken_pair : 1;
ef677686 75 unsigned renamed_pair : 1;
e9c84099 76 unsigned is_unmerged : 1;
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77 unsigned done_skip_stat_unmatch : 1;
78 unsigned skip_stat_unmatch_result : 1;
427dcb4b 79};
e9c84099 80#define DIFF_PAIR_UNMERGED(p) ((p)->is_unmerged)
427dcb4b 81
ef677686 82#define DIFF_PAIR_RENAME(p) ((p)->renamed_pair)
01c4e70f 83
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84#define DIFF_PAIR_BROKEN(p) \
85 ( (!DIFF_FILE_VALID((p)->one) != !DIFF_FILE_VALID((p)->two)) && \
86 ((p)->broken_pair != 0) )
87
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88#define DIFF_PAIR_TYPE_CHANGED(p) \
89 ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode))
90
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91#define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode)
92
78d70d9b 93void diff_free_filepair(struct diff_filepair *);
226406f6 94
78d70d9b 95int diff_unmodified_pair(struct diff_filepair *);
f7c1512a 96
427dcb4b 97struct diff_queue_struct {
52e95789 98 struct diff_filepair **queue;
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99 int alloc;
100 int nr;
101};
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102#define DIFF_QUEUE_CLEAR(q) \
103 do { \
104 (q)->queue = NULL; \
105 (q)->nr = (q)->alloc = 0; \
98746061 106 } while (0)
427dcb4b 107
38c6f780 108extern struct diff_queue_struct diff_queued_diff;
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109struct diff_filepair *diff_queue(struct diff_queue_struct *,
110 struct diff_filespec *,
111 struct diff_filespec *);
112void diff_q(struct diff_queue_struct *, struct diff_filepair *);
f7c1512a 113
b78ea5fc 114void diffcore_break(struct repository *, int);
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115void diffcore_rename(struct diff_options *);
116void diffcore_merge_broken(void);
117void diffcore_pickaxe(struct diff_options *);
118void diffcore_order(const char *orderfile);
ce240675 119
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120/* low-level interface to diffcore_order */
121struct obj_order {
122 void *obj; /* setup by caller */
123
124 /* setup/used by order_objects() */
125 int orig_order;
126 int order;
127};
128
129typedef const char *(*obj_path_fn_t)(void *obj);
130
131void order_objects(const char *orderfile, obj_path_fn_t obj_path,
132 struct obj_order *objs, int nr);
133
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134#define DIFF_DEBUG 0
135#if DIFF_DEBUG
136void diff_debug_filespec(struct diff_filespec *, int, const char *);
137void diff_debug_filepair(const struct diff_filepair *, int);
138void diff_debug_queue(const char *, struct diff_queue_struct *);
139#else
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140#define diff_debug_filespec(a,b,c) do { /* nothing */ } while (0)
141#define diff_debug_filepair(a,b) do { /* nothing */ } while (0)
142#define diff_debug_queue(a,b) do { /* nothing */ } while (0)
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143#endif
144
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145int diffcore_count_changes(struct repository *r,
146 struct diff_filespec *src,
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147 struct diff_filespec *dst,
148 void **src_count_p,
149 void **dst_count_p,
150 unsigned long *src_copied,
151 unsigned long *literal_added);
65416758 152
427dcb4b 153#endif