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 *stat_sep;
92 long xdl_opts;
93 int stat_width;
95 int stat_name_width;
96 /* this is set by diffcore for DIFF_FORMAT_PATCH */
98 int found_changes;
99 FILE *file;
101 int close_file;
102 int nr_paths;
104 const char **paths;
105 int *pathlens;
106 change_fn_t change;
107 add_remove_fn_t add_remove;
108 diff_format_fn_t format_callback;
109 void *format_callback_data;
110};
111enum color_diff {
113 DIFF_RESET = 0,
114 DIFF_PLAIN = 1,
115 DIFF_METAINFO = 2,
116 DIFF_FRAGINFO = 3,
117 DIFF_FILE_OLD = 4,
118 DIFF_FILE_NEW = 5,
119 DIFF_COMMIT = 6,
120 DIFF_WHITESPACE = 7,
121};
122const char *diff_get_color(int diff_use_color, enum color_diff ix);
123#define diff_get_color_opt(o, ix) \
124 diff_get_color(DIFF_OPT_TST((o), COLOR_DIFF), ix)
125extern const char mime_boundary_leader[];
128extern void diff_tree_setup_paths(const char **paths, struct diff_options *);
130extern void diff_tree_release_paths(struct diff_options *);
131extern int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
132 const char *base, struct diff_options *opt);
133extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
134 const char *base, struct diff_options *opt);
135extern int diff_root_tree_sha1(const unsigned char *new, const char *base,
136 struct diff_options *opt);
137struct combine_diff_path {
139 struct combine_diff_path *next;
140 int len;
141 char *path;
142 unsigned int mode;
143 unsigned char sha1[20];
144 struct combine_diff_parent {
145 char status;
146 unsigned int mode;
147 unsigned char sha1[20];
148 } parent[FLEX_ARRAY];
149};
150#define combine_diff_path_size(n, l) \
151 (sizeof(struct combine_diff_path) + \
152 sizeof(struct combine_diff_parent) * (n) + (l) + 1)
153extern void show_combined_diff(struct combine_diff_path *elem, int num_parent,
155 int dense, struct rev_info *);
156extern void diff_tree_combined(const unsigned char *sha1, const unsigned char parent[][20], int num_parent, int dense, struct rev_info *rev);
158extern void diff_tree_combined_merge(const unsigned char *sha1, int, struct rev_info *);
160extern void diff_addremove(struct diff_options *,
162 int addremove,
163 unsigned mode,
164 const unsigned char *sha1,
165 const char *base,
166 const char *path);
167extern void diff_change(struct diff_options *,
169 unsigned mode1, unsigned mode2,
170 const unsigned char *sha1,
171 const unsigned char *sha2,
172 const char *base, const char *path);
173extern void diff_unmerge(struct diff_options *,
175 const char *path,
176 unsigned mode,
177 const unsigned char *sha1);
178#define DIFF_SETUP_REVERSE 1
180#define DIFF_SETUP_USE_CACHE 2
181#define DIFF_SETUP_USE_SIZE_CACHE 4
182extern int git_diff_basic_config(const char *var, const char *value);
184extern int git_diff_ui_config(const char *var, const char *value);
185extern int diff_use_color_default;
186extern void diff_setup(struct diff_options *);
187extern int diff_opt_parse(struct diff_options *, const char **, int);
188extern int diff_setup_done(struct diff_options *);
189#define DIFF_DETECT_RENAME 1
191#define DIFF_DETECT_COPY 2
192#define DIFF_PICKAXE_ALL 1
194#define DIFF_PICKAXE_REGEX 2
195extern void diffcore_std(struct diff_options *);
197#define COMMON_DIFF_OPTIONS_HELP \
199"\ncommon diff options:\n" \
200" -z output diff-raw with lines terminated with NUL.\n" \
201" -p output patch format.\n" \
202" -u synonym for -p.\n" \
203" --patch-with-raw\n" \
204" output both a patch and the diff-raw format.\n" \
205" --stat show diffstat instead of patch.\n" \
206" --numstat show numeric diffstat instead of patch.\n" \
207" --patch-with-stat\n" \
208" output a patch and prepend its diffstat.\n" \
209" --name-only show only names of changed files.\n" \
210" --name-status show names and status of changed files.\n" \
211" --full-index show full object name on index lines.\n" \
212" --abbrev=<n> abbreviate object names in diff-tree header and diff-raw.\n" \
213" -R swap input file pairs.\n" \
214" -B detect complete rewrites.\n" \
215" -M detect renames.\n" \
216" -C detect copies.\n" \
217" --find-copies-harder\n" \
218" try unchanged files as candidate for copy detection.\n" \
219" -l<n> limit rename attempts up to <n> paths.\n" \
220" -O<file> reorder diffs according to the <file>.\n" \
221" -S<string> find filepair whose only one side contains the string.\n" \
222" --pickaxe-all\n" \
223" show all files diff when -S is used and hit is found.\n" \
224" -a --text treat all files as text.\n"
225extern int diff_queue_is_empty(void);
227extern void diff_flush(struct diff_options*);
228/* diff-raw status letters */
230#define DIFF_STATUS_ADDED 'A'
231#define DIFF_STATUS_COPIED 'C'
232#define DIFF_STATUS_DELETED 'D'
233#define DIFF_STATUS_MODIFIED 'M'
234#define DIFF_STATUS_RENAMED 'R'
235#define DIFF_STATUS_TYPE_CHANGED 'T'
236#define DIFF_STATUS_UNKNOWN 'X'
237#define DIFF_STATUS_UNMERGED 'U'
238/* these are not diff-raw status letters proper, but used by
240 * diffcore-filter insn to specify additional restrictions.
241 */
242#define DIFF_STATUS_FILTER_AON '*'
243#define DIFF_STATUS_FILTER_BROKEN 'B'
244extern const char *diff_unique_abbrev(const unsigned char *, int);
246/* do not report anything on removed paths */
248#define DIFF_SILENT_ON_REMOVED 01
249/* report racily-clean paths as modified */
250#define DIFF_RACY_IS_MODIFIED 02
251extern int run_diff_files(struct rev_info *revs, unsigned int option);
252extern int setup_diff_no_index(struct rev_info *revs,
253 int argc, const char ** argv, int nongit, const char *prefix);
254extern int run_diff_files_cmd(struct rev_info *revs, int argc, const char **argv);
255extern int run_diff_index(struct rev_info *revs, int cached);
257extern int do_diff_cache(const unsigned char *, struct diff_options *);
259extern int diff_flush_patch_id(struct diff_options *, unsigned char *);
260extern int diff_result_code(struct diff_options *, int);
262#endif /* DIFF_H */