1/*
2 * Copyright (C) 2005 Junio C Hamano
3 */
4#ifndef DIFF_H
5#define DIFF_H
6#include "tree-walk.h"
8#include "pathspec.h"
9#include "object.h"
10struct rev_info;
12struct diff_options;
13struct diff_queue_struct;
14struct strbuf;
15struct diff_filespec;
16struct userdiff_driver;
17struct oid_array;
18struct commit;
19struct combine_diff_path;
20typedef int (*pathchange_fn_t)(struct diff_options *options,
22 struct combine_diff_path *path);
23typedef void (*change_fn_t)(struct diff_options *options,
25 unsigned old_mode, unsigned new_mode,
26 const struct object_id *old_oid,
27 const struct object_id *new_oid,
28 int old_oid_valid, int new_oid_valid,
29 const char *fullpath,
30 unsigned old_dirty_submodule, unsigned new_dirty_submodule);
31typedef void (*add_remove_fn_t)(struct diff_options *options,
33 int addremove, unsigned mode,
34 const struct object_id *oid,
35 int oid_valid,
36 const char *fullpath, unsigned dirty_submodule);
37typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
39 struct diff_options *options, void *data);
40typedef struct strbuf *(*diff_prefix_fn_t)(struct diff_options *opt, void *data);
42#define DIFF_FORMAT_RAW 0x0001
44#define DIFF_FORMAT_DIFFSTAT 0x0002
45#define DIFF_FORMAT_NUMSTAT 0x0004
46#define DIFF_FORMAT_SUMMARY 0x0008
47#define DIFF_FORMAT_PATCH 0x0010
48#define DIFF_FORMAT_SHORTSTAT 0x0020
49#define DIFF_FORMAT_DIRSTAT 0x0040
50/* These override all above */
52#define DIFF_FORMAT_NAME 0x0100
53#define DIFF_FORMAT_NAME_STATUS 0x0200
54#define DIFF_FORMAT_CHECKDIFF 0x0400
55/* Same as output_format = 0 but we know that -s flag was given
57 * and we should not give default value to output_format.
58 */
59#define DIFF_FORMAT_NO_OUTPUT 0x0800
60#define DIFF_FORMAT_CALLBACK 0x1000
62#define DIFF_OPT_RECURSIVE (1 << 0)
64#define DIFF_OPT_TREE_IN_RECURSIVE (1 << 1)
65#define DIFF_OPT_BINARY (1 << 2)
66#define DIFF_OPT_TEXT (1 << 3)
67#define DIFF_OPT_FULL_INDEX (1 << 4)
68#define DIFF_OPT_SILENT_ON_REMOVE (1 << 5)
69#define DIFF_OPT_FIND_COPIES_HARDER (1 << 6)
70#define DIFF_OPT_FOLLOW_RENAMES (1 << 7)
71#define DIFF_OPT_RENAME_EMPTY (1 << 8)
72/* (1 << 9) unused */
73#define DIFF_OPT_HAS_CHANGES (1 << 10)
74#define DIFF_OPT_QUICK (1 << 11)
75#define DIFF_OPT_NO_INDEX (1 << 12)
76#define DIFF_OPT_ALLOW_EXTERNAL (1 << 13)
77#define DIFF_OPT_EXIT_WITH_STATUS (1 << 14)
78#define DIFF_OPT_REVERSE_DIFF (1 << 15)
79#define DIFF_OPT_CHECK_FAILED (1 << 16)
80#define DIFF_OPT_RELATIVE_NAME (1 << 17)
81#define DIFF_OPT_IGNORE_SUBMODULES (1 << 18)
82#define DIFF_OPT_DIRSTAT_CUMULATIVE (1 << 19)
83#define DIFF_OPT_DIRSTAT_BY_FILE (1 << 20)
84#define DIFF_OPT_ALLOW_TEXTCONV (1 << 21)
85#define DIFF_OPT_DIFF_FROM_CONTENTS (1 << 22)
86#define DIFF_OPT_DIRTY_SUBMODULES (1 << 24)
87#define DIFF_OPT_IGNORE_UNTRACKED_IN_SUBMODULES (1 << 25)
88#define DIFF_OPT_IGNORE_DIRTY_SUBMODULES (1 << 26)
89#define DIFF_OPT_OVERRIDE_SUBMODULE_CONFIG (1 << 27)
90#define DIFF_OPT_DIRSTAT_BY_LINE (1 << 28)
91#define DIFF_OPT_FUNCCONTEXT (1 << 29)
92#define DIFF_OPT_PICKAXE_IGNORE_CASE (1 << 30)
93#define DIFF_OPT_DEFAULT_FOLLOW_RENAMES (1U << 31)
94#define DIFF_OPT_TST(opts, flag) ((opts)->flags & DIFF_OPT_##flag)
96#define DIFF_OPT_TOUCHED(opts, flag) ((opts)->touched_flags & DIFF_OPT_##flag)
97#define DIFF_OPT_SET(opts, flag) (((opts)->flags |= DIFF_OPT_##flag),((opts)->touched_flags |= DIFF_OPT_##flag))
98#define DIFF_OPT_CLR(opts, flag) (((opts)->flags &= ~DIFF_OPT_##flag),((opts)->touched_flags |= DIFF_OPT_##flag))
99#define DIFF_XDL_TST(opts, flag) ((opts)->xdl_opts & XDF_##flag)
100#define DIFF_XDL_SET(opts, flag) ((opts)->xdl_opts |= XDF_##flag)
101#define DIFF_XDL_CLR(opts, flag) ((opts)->xdl_opts &= ~XDF_##flag)
102#define DIFF_WITH_ALG(opts, flag) (((opts)->xdl_opts & ~XDF_DIFF_ALGORITHM_MASK) | XDF_##flag)
104enum diff_words_type {
106 DIFF_WORDS_NONE = 0,
107 DIFF_WORDS_PORCELAIN,
108 DIFF_WORDS_PLAIN,
109 DIFF_WORDS_COLOR
110};
111enum diff_submodule_format {
113 DIFF_SUBMODULE_SHORT = 0,
114 DIFF_SUBMODULE_LOG,
115 DIFF_SUBMODULE_INLINE_DIFF
116};
117struct diff_options {
119 const char *orderfile;
120 const char *pickaxe;
121 const char *single_follow;
122 const char *a_prefix, *b_prefix;
123 const char *line_prefix;
124 size_t line_prefix_length;
125 unsigned flags;
126 unsigned touched_flags;
127 /* diff-filter bits */
129 unsigned int filter;
130 int use_color;
132 int context;
133 int interhunkcontext;
134 int break_opt;
135 int detect_rename;
136 int irreversible_delete;
137 int skip_stat_unmatch;
138 int line_termination;
139 int output_format;
140 int pickaxe_opts;
141 int rename_score;
142 int rename_limit;
143 int needed_rename_limit;
144 int degraded_cc_to_c;
145 int show_rename_progress;
146 int dirstat_permille;
147 int setup;
148 int abbrev;
149 int ita_invisible_in_index;
150/* white-space error highlighting */
151#define WSEH_NEW (1<<12)
152#define WSEH_CONTEXT (1<<13)
153#define WSEH_OLD (1<<14)
154 unsigned ws_error_highlight;
155 const char *prefix;
156 int prefix_length;
157 const char *stat_sep;
158 long xdl_opts;
159 int stat_width;
161 int stat_name_width;
162 int stat_graph_width;
163 int stat_count;
164 const char *word_regex;
165 enum diff_words_type word_diff;
166 enum diff_submodule_format submodule_format;
167 /* this is set by diffcore for DIFF_FORMAT_PATCH */
169 int found_changes;
170 /* to support internal diff recursion by --follow hack*/
172 int found_follow;
173 void (*set_default)(struct diff_options *);
175 FILE *file;
177 int close_file;
178 struct pathspec pathspec;
180 pathchange_fn_t pathchange;
181 change_fn_t change;
182 add_remove_fn_t add_remove;
183 diff_format_fn_t format_callback;
184 void *format_callback_data;
185 diff_prefix_fn_t output_prefix;
186 void *output_prefix_data;
187 int diff_path_counter;
189 struct emitted_diff_symbols *emitted_symbols;
191 enum {
192 COLOR_MOVED_NO = 0,
193 COLOR_MOVED_PLAIN = 1,
194 COLOR_MOVED_ZEBRA = 2,
195 COLOR_MOVED_ZEBRA_DIM = 3,
196 } color_moved;
197 #define COLOR_MOVED_DEFAULT COLOR_MOVED_ZEBRA
198 #define COLOR_MOVED_MIN_ALNUM_COUNT 20
199};
200void diff_emit_submodule_del(struct diff_options *o, const char *line);
202void diff_emit_submodule_add(struct diff_options *o, const char *line);
203void diff_emit_submodule_untracked(struct diff_options *o, const char *path);
204void diff_emit_submodule_modified(struct diff_options *o, const char *path);
205void diff_emit_submodule_header(struct diff_options *o, const char *header);
206void diff_emit_submodule_error(struct diff_options *o, const char *err);
207void diff_emit_submodule_pipethrough(struct diff_options *o,
208 const char *line, int len);
209enum color_diff {
211 DIFF_RESET = 0,
212 DIFF_CONTEXT = 1,
213 DIFF_METAINFO = 2,
214 DIFF_FRAGINFO = 3,
215 DIFF_FILE_OLD = 4,
216 DIFF_FILE_NEW = 5,
217 DIFF_COMMIT = 6,
218 DIFF_WHITESPACE = 7,
219 DIFF_FUNCINFO = 8,
220 DIFF_FILE_OLD_MOVED = 9,
221 DIFF_FILE_OLD_MOVED_ALT = 10,
222 DIFF_FILE_OLD_MOVED_DIM = 11,
223 DIFF_FILE_OLD_MOVED_ALT_DIM = 12,
224 DIFF_FILE_NEW_MOVED = 13,
225 DIFF_FILE_NEW_MOVED_ALT = 14,
226 DIFF_FILE_NEW_MOVED_DIM = 15,
227 DIFF_FILE_NEW_MOVED_ALT_DIM = 16
228};
229const char *diff_get_color(int diff_use_color, enum color_diff ix);
230#define diff_get_color_opt(o, ix) \
231 diff_get_color((o)->use_color, ix)
232const char *diff_line_prefix(struct diff_options *);
235extern const char mime_boundary_leader[];
238extern struct combine_diff_path *diff_tree_paths(
240 struct combine_diff_path *p, const struct object_id *oid,
241 const struct object_id **parents_oid, int nparent,
242 struct strbuf *base, struct diff_options *opt);
243extern int diff_tree_oid(const struct object_id *old_oid,
244 const struct object_id *new_oid,
245 const char *base, struct diff_options *opt);
246extern int diff_root_tree_oid(const struct object_id *new_oid, const char *base,
247 struct diff_options *opt);
248struct combine_diff_path {
250 struct combine_diff_path *next;
251 char *path;
252 unsigned int mode;
253 struct object_id oid;
254 struct combine_diff_parent {
255 char status;
256 unsigned int mode;
257 struct object_id oid;
258 } parent[FLEX_ARRAY];
259};
260#define combine_diff_path_size(n, l) \
261 st_add4(sizeof(struct combine_diff_path), (l), 1, \
262 st_mult(sizeof(struct combine_diff_parent), (n)))
263extern void show_combined_diff(struct combine_diff_path *elem, int num_parent,
265 int dense, struct rev_info *);
266extern void diff_tree_combined(const struct object_id *oid, const struct oid_array *parents, int dense, struct rev_info *rev);
268extern void diff_tree_combined_merge(const struct commit *commit, int dense, struct rev_info *rev);
270void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b);
272extern int diff_can_quit_early(struct diff_options *);
274extern void diff_addremove(struct diff_options *,
276 int addremove,
277 unsigned mode,
278 const struct object_id *oid,
279 int oid_valid,
280 const char *fullpath, unsigned dirty_submodule);
281extern void diff_change(struct diff_options *,
283 unsigned mode1, unsigned mode2,
284 const struct object_id *old_oid,
285 const struct object_id *new_oid,
286 int old_oid_valid, int new_oid_valid,
287 const char *fullpath,
288 unsigned dirty_submodule1, unsigned dirty_submodule2);
289extern struct diff_filepair *diff_unmerge(struct diff_options *, const char *path);
291#define DIFF_SETUP_REVERSE 1
293#define DIFF_SETUP_USE_CACHE 2
294#define DIFF_SETUP_USE_SIZE_CACHE 4
295/*
297 * Poor man's alternative to parse-option, to allow both stuck form
298 * (--option=value) and separate form (--option value).
299 */
300extern int parse_long_opt(const char *opt, const char **argv,
301 const char **optarg);
302extern int git_diff_basic_config(const char *var, const char *value, void *cb);
304extern int git_diff_heuristic_config(const char *var, const char *value, void *cb);
305extern void init_diff_ui_defaults(void);
306extern int git_diff_ui_config(const char *var, const char *value, void *cb);
307extern void diff_setup(struct diff_options *);
308extern int diff_opt_parse(struct diff_options *, const char **, int, const char *);
309extern void diff_setup_done(struct diff_options *);
310#define DIFF_DETECT_RENAME 1
312#define DIFF_DETECT_COPY 2
313#define DIFF_PICKAXE_ALL 1
315#define DIFF_PICKAXE_REGEX 2
316#define DIFF_PICKAXE_KIND_S 4 /* traditional plumbing counter */
318#define DIFF_PICKAXE_KIND_G 8 /* grep in the patch */
319extern void diffcore_std(struct diff_options *);
321extern void diffcore_fix_diff_index(struct diff_options *);
322#define COMMON_DIFF_OPTIONS_HELP \
324"\ncommon diff options:\n" \
325" -z output diff-raw with lines terminated with NUL.\n" \
326" -p output patch format.\n" \
327" -u synonym for -p.\n" \
328" --patch-with-raw\n" \
329" output both a patch and the diff-raw format.\n" \
330" --stat show diffstat instead of patch.\n" \
331" --numstat show numeric diffstat instead of patch.\n" \
332" --patch-with-stat\n" \
333" output a patch and prepend its diffstat.\n" \
334" --name-only show only names of changed files.\n" \
335" --name-status show names and status of changed files.\n" \
336" --full-index show full object name on index lines.\n" \
337" --abbrev=<n> abbreviate object names in diff-tree header and diff-raw.\n" \
338" -R swap input file pairs.\n" \
339" -B detect complete rewrites.\n" \
340" -M detect renames.\n" \
341" -C detect copies.\n" \
342" --find-copies-harder\n" \
343" try unchanged files as candidate for copy detection.\n" \
344" -l<n> limit rename attempts up to <n> paths.\n" \
345" -O<file> reorder diffs according to the <file>.\n" \
346" -S<string> find filepair whose only one side contains the string.\n" \
347" --pickaxe-all\n" \
348" show all files diff when -S is used and hit is found.\n" \
349" -a --text treat all files as text.\n"
350extern int diff_queue_is_empty(void);
352extern void diff_flush(struct diff_options*);
353extern void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc);
354/* diff-raw status letters */
356#define DIFF_STATUS_ADDED 'A'
357#define DIFF_STATUS_COPIED 'C'
358#define DIFF_STATUS_DELETED 'D'
359#define DIFF_STATUS_MODIFIED 'M'
360#define DIFF_STATUS_RENAMED 'R'
361#define DIFF_STATUS_TYPE_CHANGED 'T'
362#define DIFF_STATUS_UNKNOWN 'X'
363#define DIFF_STATUS_UNMERGED 'U'
364/* these are not diff-raw status letters proper, but used by
366 * diffcore-filter insn to specify additional restrictions.
367 */
368#define DIFF_STATUS_FILTER_AON '*'
369#define DIFF_STATUS_FILTER_BROKEN 'B'
370/*
372 * This is different from find_unique_abbrev() in that
373 * it stuffs the result with dots for alignment.
374 */
375extern const char *diff_aligned_abbrev(const struct object_id *sha1, int);
376/* do not report anything on removed paths */
378#define DIFF_SILENT_ON_REMOVED 01
379/* report racily-clean paths as modified */
380#define DIFF_RACY_IS_MODIFIED 02
381extern int run_diff_files(struct rev_info *revs, unsigned int option);
382extern int run_diff_index(struct rev_info *revs, int cached);
383extern int do_diff_cache(const struct object_id *, struct diff_options *);
385extern int diff_flush_patch_id(struct diff_options *, struct object_id *, int);
386extern int diff_result_code(struct diff_options *, int);
388extern void diff_no_index(struct rev_info *, int, const char **);
390extern int index_differs_from(const char *def, int diff_flags, int ita_invisible_in_index);
392/*
394 * Fill the contents of the filespec "df", respecting any textconv defined by
395 * its userdiff driver. The "driver" parameter must come from a
396 * previous call to get_textconv(), and therefore should either be NULL or have
397 * textconv enabled.
398 *
399 * Note that the memory ownership of the resulting buffer depends on whether
400 * the driver field is NULL. If it is, then the memory belongs to the filespec
401 * struct. If it is non-NULL, then "outbuf" points to a newly allocated buffer
402 * that should be freed by the caller.
403 */
404extern size_t fill_textconv(struct userdiff_driver *driver,
405 struct diff_filespec *df,
406 char **outbuf);
407/*
409 * Look up the userdiff driver for the given filespec, and return it if
410 * and only if it has textconv enabled (otherwise return NULL). The result
411 * can be passed to fill_textconv().
412 */
413extern struct userdiff_driver *get_textconv(struct diff_filespec *one);
414/*
416 * Prepare diff_filespec and convert it using diff textconv API
417 * if the textconv driver exists.
418 * Return 1 if the conversion succeeds, 0 otherwise.
419 */
420extern int textconv_object(const char *path, unsigned mode, const struct object_id *oid, int oid_valid, char **buf, unsigned long *buf_size);
421extern int parse_rename_score(const char **cp_p);
423extern long parse_algorithm_value(const char *value);
425extern void print_stat_summary(FILE *fp, int files,
427 int insertions, int deletions);
428extern void setup_diff_pager(struct diff_options *);
429#endif /* DIFF_H */