1/*
2 * Copyright (C) 2005 Junio C Hamano
3 */
4#ifndef DIFF_H
5#define DIFF_H
6#include "tree-walk.h"
8struct rev_info;
10struct diff_options;
11struct diff_queue_struct;
12typedef void (*change_fn_t)(struct diff_options *options,
14 unsigned old_mode, unsigned new_mode,
15 const unsigned char *old_sha1,
16 const unsigned char *new_sha1,
17 const char *fullpath);
18typedef void (*add_remove_fn_t)(struct diff_options *options,
20 int addremove, unsigned mode,
21 const unsigned char *sha1,
22 const char *fullpath);
23typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
25 struct diff_options *options, void *data);
26#define DIFF_FORMAT_RAW 0x0001
28#define DIFF_FORMAT_DIFFSTAT 0x0002
29#define DIFF_FORMAT_NUMSTAT 0x0004
30#define DIFF_FORMAT_SUMMARY 0x0008
31#define DIFF_FORMAT_PATCH 0x0010
32#define DIFF_FORMAT_SHORTSTAT 0x0020
33#define DIFF_FORMAT_DIRSTAT 0x0040
34/* These override all above */
36#define DIFF_FORMAT_NAME 0x0100
37#define DIFF_FORMAT_NAME_STATUS 0x0200
38#define DIFF_FORMAT_CHECKDIFF 0x0400
39/* Same as output_format = 0 but we know that -s flag was given
41 * and we should not give default value to output_format.
42 */
43#define DIFF_FORMAT_NO_OUTPUT 0x0800
44#define DIFF_FORMAT_CALLBACK 0x1000
46#define DIFF_OPT_RECURSIVE (1 << 0)
48#define DIFF_OPT_TREE_IN_RECURSIVE (1 << 1)
49#define DIFF_OPT_BINARY (1 << 2)
50#define DIFF_OPT_TEXT (1 << 3)
51#define DIFF_OPT_FULL_INDEX (1 << 4)
52#define DIFF_OPT_SILENT_ON_REMOVE (1 << 5)
53#define DIFF_OPT_FIND_COPIES_HARDER (1 << 6)
54#define DIFF_OPT_FOLLOW_RENAMES (1 << 7)
55#define DIFF_OPT_COLOR_DIFF (1 << 8)
56#define DIFF_OPT_COLOR_DIFF_WORDS (1 << 9)
57#define DIFF_OPT_HAS_CHANGES (1 << 10)
58#define DIFF_OPT_QUIET (1 << 11)
59#define DIFF_OPT_NO_INDEX (1 << 12)
60#define DIFF_OPT_ALLOW_EXTERNAL (1 << 13)
61#define DIFF_OPT_EXIT_WITH_STATUS (1 << 14)
62#define DIFF_OPT_REVERSE_DIFF (1 << 15)
63#define DIFF_OPT_CHECK_FAILED (1 << 16)
64#define DIFF_OPT_RELATIVE_NAME (1 << 17)
65#define DIFF_OPT_IGNORE_SUBMODULES (1 << 18)
66#define DIFF_OPT_DIRSTAT_CUMULATIVE (1 << 19)
67#define DIFF_OPT_DIRSTAT_BY_FILE (1 << 20)
68#define DIFF_OPT_ALLOW_TEXTCONV (1 << 21)
69#define DIFF_OPT_TST(opts, flag) ((opts)->flags & DIFF_OPT_##flag)
70#define DIFF_OPT_SET(opts, flag) ((opts)->flags |= DIFF_OPT_##flag)
71#define DIFF_OPT_CLR(opts, flag) ((opts)->flags &= ~DIFF_OPT_##flag)
72#define DIFF_XDL_TST(opts, flag) ((opts)->xdl_opts & XDF_##flag)
73#define DIFF_XDL_SET(opts, flag) ((opts)->xdl_opts |= XDF_##flag)
74#define DIFF_XDL_CLR(opts, flag) ((opts)->xdl_opts &= ~XDF_##flag)
75struct diff_options {
77 const char *filter;
78 const char *orderfile;
79 const char *pickaxe;
80 const char *single_follow;
81 const char *a_prefix, *b_prefix;
82 unsigned flags;
83 int context;
84 int interhunkcontext;
85 int break_opt;
86 int detect_rename;
87 int skip_stat_unmatch;
88 int line_termination;
89 int output_format;
90 int pickaxe_opts;
91 int rename_score;
92 int rename_limit;
93 int warn_on_too_large_rename;
94 int dirstat_percent;
95 int setup;
96 int abbrev;
97 const char *prefix;
98 int prefix_length;
99 const char *stat_sep;
100 long xdl_opts;
101 int stat_width;
103 int stat_name_width;
104 const char *word_regex;
105 /* this is set by diffcore for DIFF_FORMAT_PATCH */
107 int found_changes;
108 FILE *file;
110 int close_file;
111 int nr_paths;
113 const char **paths;
114 int *pathlens;
115 change_fn_t change;
116 add_remove_fn_t add_remove;
117 diff_format_fn_t format_callback;
118 void *format_callback_data;
119};
120enum color_diff {
122 DIFF_RESET = 0,
123 DIFF_PLAIN = 1,
124 DIFF_METAINFO = 2,
125 DIFF_FRAGINFO = 3,
126 DIFF_FILE_OLD = 4,
127 DIFF_FILE_NEW = 5,
128 DIFF_COMMIT = 6,
129 DIFF_WHITESPACE = 7,
130};
131const char *diff_get_color(int diff_use_color, enum color_diff ix);
132#define diff_get_color_opt(o, ix) \
133 diff_get_color(DIFF_OPT_TST((o), COLOR_DIFF), ix)
134extern const char mime_boundary_leader[];
137extern void diff_tree_setup_paths(const char **paths, struct diff_options *);
139extern void diff_tree_release_paths(struct diff_options *);
140extern int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
141 const char *base, struct diff_options *opt);
142extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
143 const char *base, struct diff_options *opt);
144extern int diff_root_tree_sha1(const unsigned char *new, const char *base,
145 struct diff_options *opt);
146struct combine_diff_path {
148 struct combine_diff_path *next;
149 int len;
150 char *path;
151 unsigned int mode;
152 unsigned char sha1[20];
153 struct combine_diff_parent {
154 char status;
155 unsigned int mode;
156 unsigned char sha1[20];
157 } parent[FLEX_ARRAY];
158};
159#define combine_diff_path_size(n, l) \
160 (sizeof(struct combine_diff_path) + \
161 sizeof(struct combine_diff_parent) * (n) + (l) + 1)
162extern void show_combined_diff(struct combine_diff_path *elem, int num_parent,
164 int dense, struct rev_info *);
165extern void diff_tree_combined(const unsigned char *sha1, const unsigned char parent[][20], int num_parent, int dense, struct rev_info *rev);
167extern void diff_tree_combined_merge(const unsigned char *sha1, int, struct rev_info *);
169void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b);
171extern void diff_addremove(struct diff_options *,
173 int addremove,
174 unsigned mode,
175 const unsigned char *sha1,
176 const char *fullpath);
177extern void diff_change(struct diff_options *,
179 unsigned mode1, unsigned mode2,
180 const unsigned char *sha1,
181 const unsigned char *sha2,
182 const char *fullpath);
183extern void diff_unmerge(struct diff_options *,
185 const char *path,
186 unsigned mode,
187 const unsigned char *sha1);
188#define DIFF_SETUP_REVERSE 1
190#define DIFF_SETUP_USE_CACHE 2
191#define DIFF_SETUP_USE_SIZE_CACHE 4
192extern int git_diff_basic_config(const char *var, const char *value, void *cb);
194extern int git_diff_ui_config(const char *var, const char *value, void *cb);
195extern int diff_use_color_default;
196extern void diff_setup(struct diff_options *);
197extern int diff_opt_parse(struct diff_options *, const char **, int);
198extern int diff_setup_done(struct diff_options *);
199#define DIFF_DETECT_RENAME 1
201#define DIFF_DETECT_COPY 2
202#define DIFF_PICKAXE_ALL 1
204#define DIFF_PICKAXE_REGEX 2
205extern void diffcore_std(struct diff_options *);
207#define COMMON_DIFF_OPTIONS_HELP \
209"\ncommon diff options:\n" \
210" -z output diff-raw with lines terminated with NUL.\n" \
211" -p output patch format.\n" \
212" -u synonym for -p.\n" \
213" --patch-with-raw\n" \
214" output both a patch and the diff-raw format.\n" \
215" --stat show diffstat instead of patch.\n" \
216" --numstat show numeric diffstat instead of patch.\n" \
217" --patch-with-stat\n" \
218" output a patch and prepend its diffstat.\n" \
219" --name-only show only names of changed files.\n" \
220" --name-status show names and status of changed files.\n" \
221" --full-index show full object name on index lines.\n" \
222" --abbrev=<n> abbreviate object names in diff-tree header and diff-raw.\n" \
223" -R swap input file pairs.\n" \
224" -B detect complete rewrites.\n" \
225" -M detect renames.\n" \
226" -C detect copies.\n" \
227" --find-copies-harder\n" \
228" try unchanged files as candidate for copy detection.\n" \
229" -l<n> limit rename attempts up to <n> paths.\n" \
230" -O<file> reorder diffs according to the <file>.\n" \
231" -S<string> find filepair whose only one side contains the string.\n" \
232" --pickaxe-all\n" \
233" show all files diff when -S is used and hit is found.\n" \
234" -a --text treat all files as text.\n"
235extern int diff_queue_is_empty(void);
237extern void diff_flush(struct diff_options*);
238/* diff-raw status letters */
240#define DIFF_STATUS_ADDED 'A'
241#define DIFF_STATUS_COPIED 'C'
242#define DIFF_STATUS_DELETED 'D'
243#define DIFF_STATUS_MODIFIED 'M'
244#define DIFF_STATUS_RENAMED 'R'
245#define DIFF_STATUS_TYPE_CHANGED 'T'
246#define DIFF_STATUS_UNKNOWN 'X'
247#define DIFF_STATUS_UNMERGED 'U'
248/* these are not diff-raw status letters proper, but used by
250 * diffcore-filter insn to specify additional restrictions.
251 */
252#define DIFF_STATUS_FILTER_AON '*'
253#define DIFF_STATUS_FILTER_BROKEN 'B'
254extern const char *diff_unique_abbrev(const unsigned char *, int);
256/* do not report anything on removed paths */
258#define DIFF_SILENT_ON_REMOVED 01
259/* report racily-clean paths as modified */
260#define DIFF_RACY_IS_MODIFIED 02
261extern int run_diff_files(struct rev_info *revs, unsigned int option);
262extern int run_diff_index(struct rev_info *revs, int cached);
263extern int do_diff_cache(const unsigned char *, struct diff_options *);
265extern int diff_flush_patch_id(struct diff_options *, unsigned char *);
266extern int diff_result_code(struct diff_options *, int);
268extern void diff_no_index(struct rev_info *, int, const char **, int, const char *);
270extern int index_differs_from(const char *def, int diff_flags);
272#endif /* DIFF_H */