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 *base, const char *path);
18typedef void (*add_remove_fn_t)(struct diff_options *options,
20 int addremove, unsigned mode,
21 const unsigned char *sha1,
22 const char *base, const char *path);
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#define DIFF_FORMAT_CUMULATIVE 0x0080
35/* These override all above */
37#define DIFF_FORMAT_NAME 0x0100
38#define DIFF_FORMAT_NAME_STATUS 0x0200
39#define DIFF_FORMAT_CHECKDIFF 0x0400
40/* Same as output_format = 0 but we know that -s flag was given
42 * and we should not give default value to output_format.
43 */
44#define DIFF_FORMAT_NO_OUTPUT 0x0800
45#define DIFF_FORMAT_CALLBACK 0x1000
47#define DIFF_OPT_RECURSIVE (1 << 0)
49#define DIFF_OPT_TREE_IN_RECURSIVE (1 << 1)
50#define DIFF_OPT_BINARY (1 << 2)
51#define DIFF_OPT_TEXT (1 << 3)
52#define DIFF_OPT_FULL_INDEX (1 << 4)
53#define DIFF_OPT_SILENT_ON_REMOVE (1 << 5)
54#define DIFF_OPT_FIND_COPIES_HARDER (1 << 6)
55#define DIFF_OPT_FOLLOW_RENAMES (1 << 7)
56#define DIFF_OPT_COLOR_DIFF (1 << 8)
57#define DIFF_OPT_COLOR_DIFF_WORDS (1 << 9)
58#define DIFF_OPT_HAS_CHANGES (1 << 10)
59#define DIFF_OPT_QUIET (1 << 11)
60#define DIFF_OPT_NO_INDEX (1 << 12)
61#define DIFF_OPT_ALLOW_EXTERNAL (1 << 13)
62#define DIFF_OPT_EXIT_WITH_STATUS (1 << 14)
63#define DIFF_OPT_REVERSE_DIFF (1 << 15)
64#define DIFF_OPT_CHECK_FAILED (1 << 16)
65#define DIFF_OPT_RELATIVE_NAME (1 << 17)
66#define DIFF_OPT_TST(opts, flag) ((opts)->flags & DIFF_OPT_##flag)
67#define DIFF_OPT_SET(opts, flag) ((opts)->flags |= DIFF_OPT_##flag)
68#define DIFF_OPT_CLR(opts, flag) ((opts)->flags &= ~DIFF_OPT_##flag)
69struct diff_options {
71 const char *filter;
72 const char *orderfile;
73 const char *pickaxe;
74 const char *single_follow;
75 const char *a_prefix, *b_prefix;
76 unsigned flags;
77 int context;
78 int break_opt;
79 int detect_rename;
80 int skip_stat_unmatch;
81 int line_termination;
82 int output_format;
83 int pickaxe_opts;
84 int rename_score;
85 int rename_limit;
86 int dirstat_percent;
87 int setup;
88 int abbrev;
89 const char *prefix;
90 int prefix_length;
91 const char *msg_sep;
92 const char *stat_sep;
93 long xdl_opts;
94 int stat_width;
96 int stat_name_width;
97 /* this is set by diffcore for DIFF_FORMAT_PATCH */
99 int found_changes;
100 FILE *file;
102 int close_file;
103 int nr_paths;
105 const char **paths;
106 int *pathlens;
107 change_fn_t change;
108 add_remove_fn_t add_remove;
109 diff_format_fn_t format_callback;
110 void *format_callback_data;
111};
112enum color_diff {
114 DIFF_RESET = 0,
115 DIFF_PLAIN = 1,
116 DIFF_METAINFO = 2,
117 DIFF_FRAGINFO = 3,
118 DIFF_FILE_OLD = 4,
119 DIFF_FILE_NEW = 5,
120 DIFF_COMMIT = 6,
121 DIFF_WHITESPACE = 7,
122};
123const char *diff_get_color(int diff_use_color, enum color_diff ix);
124#define diff_get_color_opt(o, ix) \
125 diff_get_color(DIFF_OPT_TST((o), COLOR_DIFF), ix)
126extern const char mime_boundary_leader[];
129extern void diff_tree_setup_paths(const char **paths, struct diff_options *);
131extern void diff_tree_release_paths(struct diff_options *);
132extern int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
133 const char *base, struct diff_options *opt);
134extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
135 const char *base, struct diff_options *opt);
136extern int diff_root_tree_sha1(const unsigned char *new, const char *base,
137 struct diff_options *opt);
138struct combine_diff_path {
140 struct combine_diff_path *next;
141 int len;
142 char *path;
143 unsigned int mode;
144 unsigned char sha1[20];
145 struct combine_diff_parent {
146 char status;
147 unsigned int mode;
148 unsigned char sha1[20];
149 } parent[FLEX_ARRAY];
150};
151#define combine_diff_path_size(n, l) \
152 (sizeof(struct combine_diff_path) + \
153 sizeof(struct combine_diff_parent) * (n) + (l) + 1)
154extern void show_combined_diff(struct combine_diff_path *elem, int num_parent,
156 int dense, struct rev_info *);
157extern void diff_tree_combined(const unsigned char *sha1, const unsigned char parent[][20], int num_parent, int dense, struct rev_info *rev);
159extern void diff_tree_combined_merge(const unsigned char *sha1, int, struct rev_info *);
161extern void diff_addremove(struct diff_options *,
163 int addremove,
164 unsigned mode,
165 const unsigned char *sha1,
166 const char *base,
167 const char *path);
168extern void diff_change(struct diff_options *,
170 unsigned mode1, unsigned mode2,
171 const unsigned char *sha1,
172 const unsigned char *sha2,
173 const char *base, const char *path);
174extern void diff_unmerge(struct diff_options *,
176 const char *path,
177 unsigned mode,
178 const unsigned char *sha1);
179#define DIFF_SETUP_REVERSE 1
181#define DIFF_SETUP_USE_CACHE 2
182#define DIFF_SETUP_USE_SIZE_CACHE 4
183extern int git_diff_basic_config(const char *var, const char *value);
185extern int git_diff_ui_config(const char *var, const char *value);
186extern int diff_use_color_default;
187extern void diff_setup(struct diff_options *);
188extern int diff_opt_parse(struct diff_options *, const char **, int);
189extern int diff_setup_done(struct diff_options *);
190#define DIFF_DETECT_RENAME 1
192#define DIFF_DETECT_COPY 2
193#define DIFF_PICKAXE_ALL 1
195#define DIFF_PICKAXE_REGEX 2
196extern void diffcore_std(struct diff_options *);
198#define COMMON_DIFF_OPTIONS_HELP \
200"\ncommon diff options:\n" \
201" -z output diff-raw with lines terminated with NUL.\n" \
202" -p output patch format.\n" \
203" -u synonym for -p.\n" \
204" --patch-with-raw\n" \
205" output both a patch and the diff-raw format.\n" \
206" --stat show diffstat instead of patch.\n" \
207" --numstat show numeric diffstat instead of patch.\n" \
208" --patch-with-stat\n" \
209" output a patch and prepend its diffstat.\n" \
210" --name-only show only names of changed files.\n" \
211" --name-status show names and status of changed files.\n" \
212" --full-index show full object name on index lines.\n" \
213" --abbrev=<n> abbreviate object names in diff-tree header and diff-raw.\n" \
214" -R swap input file pairs.\n" \
215" -B detect complete rewrites.\n" \
216" -M detect renames.\n" \
217" -C detect copies.\n" \
218" --find-copies-harder\n" \
219" try unchanged files as candidate for copy detection.\n" \
220" -l<n> limit rename attempts up to <n> paths.\n" \
221" -O<file> reorder diffs according to the <file>.\n" \
222" -S<string> find filepair whose only one side contains the string.\n" \
223" --pickaxe-all\n" \
224" show all files diff when -S is used and hit is found.\n" \
225" -a --text treat all files as text.\n"
226extern int diff_queue_is_empty(void);
228extern void diff_flush(struct diff_options*);
229/* diff-raw status letters */
231#define DIFF_STATUS_ADDED 'A'
232#define DIFF_STATUS_COPIED 'C'
233#define DIFF_STATUS_DELETED 'D'
234#define DIFF_STATUS_MODIFIED 'M'
235#define DIFF_STATUS_RENAMED 'R'
236#define DIFF_STATUS_TYPE_CHANGED 'T'
237#define DIFF_STATUS_UNKNOWN 'X'
238#define DIFF_STATUS_UNMERGED 'U'
239/* these are not diff-raw status letters proper, but used by
241 * diffcore-filter insn to specify additional restrictions.
242 */
243#define DIFF_STATUS_FILTER_AON '*'
244#define DIFF_STATUS_FILTER_BROKEN 'B'
245extern const char *diff_unique_abbrev(const unsigned char *, int);
247/* do not report anything on removed paths */
249#define DIFF_SILENT_ON_REMOVED 01
250/* report racily-clean paths as modified */
251#define DIFF_RACY_IS_MODIFIED 02
252extern int run_diff_files(struct rev_info *revs, unsigned int option);
253extern int setup_diff_no_index(struct rev_info *revs,
254 int argc, const char ** argv, int nongit, const char *prefix);
255extern int run_diff_files_cmd(struct rev_info *revs, int argc, const char **argv);
256extern int run_diff_index(struct rev_info *revs, int cached);
258extern int do_diff_cache(const unsigned char *, struct diff_options *);
260extern int diff_flush_patch_id(struct diff_options *, unsigned char *);
261extern int diff_result_code(struct diff_options *, int);
263#endif /* DIFF_H */