[PATCH] Tweak count-delta interface
[git/git.git] / diffcore.h
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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 */
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11#define MAX_SCORE 60000
12#define DEFAULT_RENAME_SCORE 30000 /* rename/copy similarity minimum (50%) */
13#define DEFAULT_BREAK_SCORE 59400 /* minimum for break to happen (99%)*/
427dcb4b 14
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15struct diff_filespec {
16 unsigned char sha1[20];
17 char *path;
18 void *data;
19 unsigned long size;
20 int xfrm_flags; /* for use by the xfrm */
21 unsigned short mode; /* file mode */
22 unsigned sha1_valid : 1; /* if true, use sha1 and trust mode;
23 * if false, use the name and read from
24 * the filesystem.
25 */
81e50eab 26#define DIFF_FILE_VALID(spec) (((spec)->mode) != 0)
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27 unsigned should_free : 1; /* data should be free()'ed */
28 unsigned should_munmap : 1; /* data should be munmap()'ed */
29};
30
31extern struct diff_filespec *alloc_filespec(const char *);
32extern void fill_filespec(struct diff_filespec *, const unsigned char *,
33 unsigned short);
34
f0c6b2a2 35extern int diff_populate_filespec(struct diff_filespec *, int);
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36extern void diff_free_filespec_data(struct diff_filespec *);
37
52e95789 38struct diff_filepair {
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39 struct diff_filespec *one;
40 struct diff_filespec *two;
01c4e70f 41 unsigned short int score;
15d061b4 42 char status; /* M C R N D U (see Documentation/diff-format.txt) */
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43 unsigned source_stays : 1; /* all of R/C are copies */
44 unsigned broken_pair : 1;
427dcb4b 45};
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46#define DIFF_PAIR_UNMERGED(p) \
47 (!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two))
427dcb4b 48
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49#define DIFF_PAIR_RENAME(p) (strcmp((p)->one->path, (p)->two->path))
50
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51#define DIFF_PAIR_BROKEN(p) \
52 ( (!DIFF_FILE_VALID((p)->one) != !DIFF_FILE_VALID((p)->two)) && \
53 ((p)->broken_pair != 0) )
54
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55#define DIFF_PAIR_TYPE_CHANGED(p) \
56 ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode))
57
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58#define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode)
59
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60extern void diff_free_filepair(struct diff_filepair *);
61
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62extern int diff_unmodified_pair(struct diff_filepair *);
63
427dcb4b 64struct diff_queue_struct {
52e95789 65 struct diff_filepair **queue;
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66 int alloc;
67 int nr;
68};
69
38c6f780 70extern struct diff_queue_struct diff_queued_diff;
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71extern struct diff_filepair *diff_queue(struct diff_queue_struct *,
72 struct diff_filespec *,
73 struct diff_filespec *);
6b14d7fa 74extern void diff_q(struct diff_queue_struct *, struct diff_filepair *);
f7c1512a 75
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76#define DIFF_DEBUG 0
77#if DIFF_DEBUG
78void diff_debug_filespec(struct diff_filespec *, int, const char *);
79void diff_debug_filepair(const struct diff_filepair *, int);
80void diff_debug_queue(const char *, struct diff_queue_struct *);
81#else
82#define diff_debug_filespec(a,b,c) do {} while(0)
83#define diff_debug_filepair(a,b) do {} while(0)
84#define diff_debug_queue(a,b) do {} while(0)
85#endif
86
427dcb4b 87#endif