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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 | */ | |
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 | */ | |
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%) */ | |
22 | ||
23 | #define MINIMUM_BREAK_SIZE 400 /* do not break a file smaller than this */ | |
24 | ||
25 | struct userdiff_driver; | |
26 | ||
27 | struct diff_filespec { | |
28 | unsigned char sha1[20]; | |
29 | char *path; | |
30 | void *data; | |
31 | void *cnt_data; | |
32 | const char *funcname_pattern_ident; | |
33 | unsigned long size; | |
34 | int count; /* Reference count */ | |
35 | int xfrm_flags; /* for use by the xfrm */ | |
36 | int rename_used; /* Count of rename users */ | |
37 | unsigned short mode; /* file mode */ | |
38 | unsigned sha1_valid : 1; /* if true, use sha1 and trust mode; | |
39 | * if false, use the name and read from | |
40 | * the filesystem. | |
41 | */ | |
42 | #define DIFF_FILE_VALID(spec) (((spec)->mode) != 0) | |
43 | unsigned should_free : 1; /* data should be free()'ed */ | |
44 | unsigned should_munmap : 1; /* data should be munmap()'ed */ | |
45 | unsigned dirty_submodule : 2; /* For submodules: its work tree is dirty */ | |
46 | unsigned is_stdin : 1; | |
47 | #define DIRTY_SUBMODULE_UNTRACKED 1 | |
48 | #define DIRTY_SUBMODULE_MODIFIED 2 | |
49 | unsigned has_more_entries : 1; /* only appear in combined diff */ | |
50 | struct userdiff_driver *driver; | |
51 | /* data should be considered "binary"; -1 means "don't know yet" */ | |
52 | int is_binary; | |
53 | }; | |
54 | ||
55 | extern struct diff_filespec *alloc_filespec(const char *); | |
56 | extern void free_filespec(struct diff_filespec *); | |
57 | extern void fill_filespec(struct diff_filespec *, const unsigned char *, | |
58 | int, unsigned short); | |
59 | ||
60 | extern int diff_populate_filespec(struct diff_filespec *, int); | |
61 | extern void diff_free_filespec_data(struct diff_filespec *); | |
62 | extern void diff_free_filespec_blob(struct diff_filespec *); | |
63 | extern int diff_filespec_is_binary(struct diff_filespec *); | |
64 | ||
65 | struct diff_filepair { | |
66 | struct diff_filespec *one; | |
67 | struct diff_filespec *two; | |
68 | unsigned short int score; | |
69 | char status; /* M C R A D U etc. (see Documentation/diff-format.txt or DIFF_STATUS_* in diff.h) */ | |
70 | unsigned broken_pair : 1; | |
71 | unsigned renamed_pair : 1; | |
72 | unsigned is_unmerged : 1; | |
73 | }; | |
74 | #define DIFF_PAIR_UNMERGED(p) ((p)->is_unmerged) | |
75 | ||
76 | #define DIFF_PAIR_RENAME(p) ((p)->renamed_pair) | |
77 | ||
78 | #define DIFF_PAIR_BROKEN(p) \ | |
79 | ( (!DIFF_FILE_VALID((p)->one) != !DIFF_FILE_VALID((p)->two)) && \ | |
80 | ((p)->broken_pair != 0) ) | |
81 | ||
82 | #define DIFF_PAIR_TYPE_CHANGED(p) \ | |
83 | ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode)) | |
84 | ||
85 | #define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode) | |
86 | ||
87 | extern void diff_free_filepair(struct diff_filepair *); | |
88 | ||
89 | extern int diff_unmodified_pair(struct diff_filepair *); | |
90 | ||
91 | struct diff_queue_struct { | |
92 | struct diff_filepair **queue; | |
93 | int alloc; | |
94 | int nr; | |
95 | }; | |
96 | #define DIFF_QUEUE_CLEAR(q) \ | |
97 | do { \ | |
98 | (q)->queue = NULL; \ | |
99 | (q)->nr = (q)->alloc = 0; \ | |
100 | } while (0) | |
101 | ||
102 | extern struct diff_queue_struct diff_queued_diff; | |
103 | extern struct diff_filepair *diff_queue(struct diff_queue_struct *, | |
104 | struct diff_filespec *, | |
105 | struct diff_filespec *); | |
106 | extern void diff_q(struct diff_queue_struct *, struct diff_filepair *); | |
107 | ||
108 | extern void diffcore_break(int); | |
109 | extern void diffcore_rename(struct diff_options *); | |
110 | extern void diffcore_merge_broken(void); | |
111 | extern void diffcore_pickaxe(struct diff_options *); | |
112 | extern void diffcore_order(const char *orderfile); | |
113 | ||
114 | #define DIFF_DEBUG 0 | |
115 | #if DIFF_DEBUG | |
116 | void diff_debug_filespec(struct diff_filespec *, int, const char *); | |
117 | void diff_debug_filepair(const struct diff_filepair *, int); | |
118 | void diff_debug_queue(const char *, struct diff_queue_struct *); | |
119 | #else | |
120 | #define diff_debug_filespec(a,b,c) do { /* nothing */ } while (0) | |
121 | #define diff_debug_filepair(a,b) do { /* nothing */ } while (0) | |
122 | #define diff_debug_queue(a,b) do { /* nothing */ } while (0) | |
123 | #endif | |
124 | ||
125 | extern int diffcore_count_changes(struct diff_filespec *src, | |
126 | struct diff_filespec *dst, | |
127 | void **src_count_p, | |
128 | void **dst_count_p, | |
129 | unsigned long delta_limit, | |
130 | unsigned long *src_copied, | |
131 | unsigned long *literal_added); | |
132 | ||
133 | #endif |