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427dcb4b JH |
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 | */ | |
eeaa4603 JH |
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%) */ |
f78c79c5 | 20 | #define DEFAULT_BREAK_SCORE 30000 /* minimum for break to happen (50%)*/ |
eeaa4603 JH |
21 | #define DEFAULT_MERGE_SCORE 48000 /* maximum for break-merge to happen (80%)*/ |
22 | ||
23 | #define MINIMUM_BREAK_SIZE 400 /* do not break a file smaller than this */ | |
427dcb4b | 24 | |
427dcb4b JH |
25 | struct diff_filespec { |
26 | unsigned char sha1[20]; | |
27 | char *path; | |
28 | void *data; | |
29 | unsigned long size; | |
30 | int xfrm_flags; /* for use by the xfrm */ | |
31 | unsigned short mode; /* file mode */ | |
32 | unsigned sha1_valid : 1; /* if true, use sha1 and trust mode; | |
33 | * if false, use the name and read from | |
34 | * the filesystem. | |
35 | */ | |
dc7090ef | 36 | #define DIFF_FILE_VALID(spec) (((spec)->mode) != 0) |
427dcb4b JH |
37 | unsigned should_free : 1; /* data should be free()'ed */ |
38 | unsigned should_munmap : 1; /* data should be munmap()'ed */ | |
39 | }; | |
40 | ||
41 | extern struct diff_filespec *alloc_filespec(const char *); | |
42 | extern void fill_filespec(struct diff_filespec *, const unsigned char *, | |
43 | unsigned short); | |
44 | ||
f0c6b2a2 | 45 | extern int diff_populate_filespec(struct diff_filespec *, int); |
19397b45 | 46 | extern void diff_free_filespec_data(struct diff_filespec *); |
427dcb4b | 47 | |
52e95789 | 48 | struct diff_filepair { |
427dcb4b JH |
49 | struct diff_filespec *one; |
50 | struct diff_filespec *two; | |
01c4e70f | 51 | unsigned short int score; |
15d061b4 | 52 | char status; /* M C R N D U (see Documentation/diff-format.txt) */ |
f345b0a0 JH |
53 | unsigned source_stays : 1; /* all of R/C are copies */ |
54 | unsigned broken_pair : 1; | |
427dcb4b | 55 | }; |
6b14d7fa JH |
56 | #define DIFF_PAIR_UNMERGED(p) \ |
57 | (!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two)) | |
427dcb4b | 58 | |
01c4e70f JH |
59 | #define DIFF_PAIR_RENAME(p) (strcmp((p)->one->path, (p)->two->path)) |
60 | ||
f345b0a0 JH |
61 | #define DIFF_PAIR_BROKEN(p) \ |
62 | ( (!DIFF_FILE_VALID((p)->one) != !DIFF_FILE_VALID((p)->two)) && \ | |
63 | ((p)->broken_pair != 0) ) | |
64 | ||
96716a19 JH |
65 | #define DIFF_PAIR_TYPE_CHANGED(p) \ |
66 | ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode)) | |
67 | ||
4130b995 JH |
68 | #define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode) |
69 | ||
226406f6 JH |
70 | extern void diff_free_filepair(struct diff_filepair *); |
71 | ||
f7c1512a JH |
72 | extern int diff_unmodified_pair(struct diff_filepair *); |
73 | ||
427dcb4b | 74 | struct diff_queue_struct { |
52e95789 | 75 | struct diff_filepair **queue; |
427dcb4b JH |
76 | int alloc; |
77 | int nr; | |
78 | }; | |
79 | ||
38c6f780 | 80 | extern struct diff_queue_struct diff_queued_diff; |
52e95789 JH |
81 | extern struct diff_filepair *diff_queue(struct diff_queue_struct *, |
82 | struct diff_filespec *, | |
83 | struct diff_filespec *); | |
6b14d7fa | 84 | extern void diff_q(struct diff_queue_struct *, struct diff_filepair *); |
f7c1512a | 85 | |
ce240675 JH |
86 | extern void diffcore_pathspec(const char **pathspec); |
87 | extern void diffcore_break(int); | |
8082d8d3 | 88 | extern void diffcore_rename(struct diff_options *); |
eeaa4603 | 89 | extern void diffcore_merge_broken(void); |
ce240675 JH |
90 | extern void diffcore_pickaxe(const char *needle, int opts); |
91 | extern void diffcore_order(const char *orderfile); | |
92 | ||
25d5ea41 JH |
93 | #define DIFF_DEBUG 0 |
94 | #if DIFF_DEBUG | |
95 | void diff_debug_filespec(struct diff_filespec *, int, const char *); | |
96 | void diff_debug_filepair(const struct diff_filepair *, int); | |
97 | void diff_debug_queue(const char *, struct diff_queue_struct *); | |
98 | #else | |
99 | #define diff_debug_filespec(a,b,c) do {} while(0) | |
100 | #define diff_debug_filepair(a,b) do {} while(0) | |
101 | #define diff_debug_queue(a,b) do {} while(0) | |
102 | #endif | |
103 | ||
65416758 JH |
104 | extern int diffcore_count_changes(void *src, unsigned long src_size, |
105 | void *dst, unsigned long dst_size, | |
106 | unsigned long delta_limit, | |
107 | unsigned long *src_copied, | |
108 | unsigned long *literal_added); | |
109 | ||
427dcb4b | 110 | #endif |