t/helper: merge test-sigchain into test-tool
[alt-git.git] / diff.h
blobd29560f822ca0ee4738f769e2feb3939851d7ff1
1 /*
2 * Copyright (C) 2005 Junio C Hamano
3 */
4 #ifndef DIFF_H
5 #define DIFF_H
7 #include "tree-walk.h"
8 #include "pathspec.h"
9 #include "object.h"
10 #include "oidset.h"
12 struct rev_info;
13 struct diff_options;
14 struct diff_queue_struct;
15 struct strbuf;
16 struct diff_filespec;
17 struct userdiff_driver;
18 struct oid_array;
19 struct commit;
20 struct combine_diff_path;
22 typedef int (*pathchange_fn_t)(struct diff_options *options,
23 struct combine_diff_path *path);
25 typedef void (*change_fn_t)(struct diff_options *options,
26 unsigned old_mode, unsigned new_mode,
27 const struct object_id *old_oid,
28 const struct object_id *new_oid,
29 int old_oid_valid, int new_oid_valid,
30 const char *fullpath,
31 unsigned old_dirty_submodule, unsigned new_dirty_submodule);
33 typedef void (*add_remove_fn_t)(struct diff_options *options,
34 int addremove, unsigned mode,
35 const struct object_id *oid,
36 int oid_valid,
37 const char *fullpath, unsigned dirty_submodule);
39 typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
40 struct diff_options *options, void *data);
42 typedef struct strbuf *(*diff_prefix_fn_t)(struct diff_options *opt, void *data);
44 #define DIFF_FORMAT_RAW 0x0001
45 #define DIFF_FORMAT_DIFFSTAT 0x0002
46 #define DIFF_FORMAT_NUMSTAT 0x0004
47 #define DIFF_FORMAT_SUMMARY 0x0008
48 #define DIFF_FORMAT_PATCH 0x0010
49 #define DIFF_FORMAT_SHORTSTAT 0x0020
50 #define DIFF_FORMAT_DIRSTAT 0x0040
52 /* These override all above */
53 #define DIFF_FORMAT_NAME 0x0100
54 #define DIFF_FORMAT_NAME_STATUS 0x0200
55 #define DIFF_FORMAT_CHECKDIFF 0x0400
57 /* Same as output_format = 0 but we know that -s flag was given
58 * and we should not give default value to output_format.
60 #define DIFF_FORMAT_NO_OUTPUT 0x0800
62 #define DIFF_FORMAT_CALLBACK 0x1000
64 #define DIFF_FLAGS_INIT { 0 }
65 struct diff_flags {
66 unsigned recursive:1;
67 unsigned tree_in_recursive:1;
68 unsigned binary:1;
69 unsigned text:1;
70 unsigned full_index:1;
71 unsigned silent_on_remove:1;
72 unsigned find_copies_harder:1;
73 unsigned follow_renames:1;
74 unsigned rename_empty:1;
75 unsigned has_changes:1;
76 unsigned quick:1;
77 unsigned no_index:1;
78 unsigned allow_external:1;
79 unsigned exit_with_status:1;
80 unsigned reverse_diff:1;
81 unsigned check_failed:1;
82 unsigned relative_name:1;
83 unsigned ignore_submodules:1;
84 unsigned dirstat_cumulative:1;
85 unsigned dirstat_by_file:1;
86 unsigned allow_textconv:1;
87 unsigned textconv_set_via_cmdline:1;
88 unsigned diff_from_contents:1;
89 unsigned dirty_submodules:1;
90 unsigned ignore_untracked_in_submodules:1;
91 unsigned ignore_dirty_submodules:1;
92 unsigned override_submodule_config:1;
93 unsigned dirstat_by_line:1;
94 unsigned funccontext:1;
95 unsigned default_follow_renames:1;
96 unsigned stat_with_summary:1;
99 static inline void diff_flags_or(struct diff_flags *a,
100 const struct diff_flags *b)
102 char *tmp_a = (char *)a;
103 const char *tmp_b = (const char *)b;
104 int i;
106 for (i = 0; i < sizeof(struct diff_flags); i++)
107 tmp_a[i] |= tmp_b[i];
110 #define DIFF_XDL_TST(opts, flag) ((opts)->xdl_opts & XDF_##flag)
111 #define DIFF_XDL_SET(opts, flag) ((opts)->xdl_opts |= XDF_##flag)
112 #define DIFF_XDL_CLR(opts, flag) ((opts)->xdl_opts &= ~XDF_##flag)
114 #define DIFF_WITH_ALG(opts, flag) (((opts)->xdl_opts & ~XDF_DIFF_ALGORITHM_MASK) | XDF_##flag)
116 enum diff_words_type {
117 DIFF_WORDS_NONE = 0,
118 DIFF_WORDS_PORCELAIN,
119 DIFF_WORDS_PLAIN,
120 DIFF_WORDS_COLOR
123 enum diff_submodule_format {
124 DIFF_SUBMODULE_SHORT = 0,
125 DIFF_SUBMODULE_LOG,
126 DIFF_SUBMODULE_INLINE_DIFF
129 struct diff_options {
130 const char *orderfile;
131 const char *pickaxe;
132 const char *single_follow;
133 const char *a_prefix, *b_prefix;
134 const char *line_prefix;
135 size_t line_prefix_length;
136 struct diff_flags flags;
138 /* diff-filter bits */
139 unsigned int filter;
141 int use_color;
142 int context;
143 int interhunkcontext;
144 int break_opt;
145 int detect_rename;
146 int irreversible_delete;
147 int skip_stat_unmatch;
148 int line_termination;
149 int output_format;
150 unsigned pickaxe_opts;
151 int rename_score;
152 int rename_limit;
153 int needed_rename_limit;
154 int degraded_cc_to_c;
155 int show_rename_progress;
156 int dirstat_permille;
157 int setup;
158 int abbrev;
159 int ita_invisible_in_index;
160 /* white-space error highlighting */
161 #define WSEH_NEW (1<<12)
162 #define WSEH_CONTEXT (1<<13)
163 #define WSEH_OLD (1<<14)
164 unsigned ws_error_highlight;
165 const char *prefix;
166 int prefix_length;
167 const char *stat_sep;
168 long xdl_opts;
170 /* see Documentation/diff-options.txt */
171 char **anchors;
172 size_t anchors_nr, anchors_alloc;
174 int stat_width;
175 int stat_name_width;
176 int stat_graph_width;
177 int stat_count;
178 const char *word_regex;
179 enum diff_words_type word_diff;
180 enum diff_submodule_format submodule_format;
182 struct oidset *objfind;
184 /* this is set by diffcore for DIFF_FORMAT_PATCH */
185 int found_changes;
187 /* to support internal diff recursion by --follow hack*/
188 int found_follow;
190 void (*set_default)(struct diff_options *);
192 FILE *file;
193 int close_file;
195 struct pathspec pathspec;
196 pathchange_fn_t pathchange;
197 change_fn_t change;
198 add_remove_fn_t add_remove;
199 void *change_fn_data;
200 diff_format_fn_t format_callback;
201 void *format_callback_data;
202 diff_prefix_fn_t output_prefix;
203 void *output_prefix_data;
205 int diff_path_counter;
207 struct emitted_diff_symbols *emitted_symbols;
208 enum {
209 COLOR_MOVED_NO = 0,
210 COLOR_MOVED_PLAIN = 1,
211 COLOR_MOVED_ZEBRA = 2,
212 COLOR_MOVED_ZEBRA_DIM = 3,
213 } color_moved;
214 #define COLOR_MOVED_DEFAULT COLOR_MOVED_ZEBRA
215 #define COLOR_MOVED_MIN_ALNUM_COUNT 20
218 void diff_emit_submodule_del(struct diff_options *o, const char *line);
219 void diff_emit_submodule_add(struct diff_options *o, const char *line);
220 void diff_emit_submodule_untracked(struct diff_options *o, const char *path);
221 void diff_emit_submodule_modified(struct diff_options *o, const char *path);
222 void diff_emit_submodule_header(struct diff_options *o, const char *header);
223 void diff_emit_submodule_error(struct diff_options *o, const char *err);
224 void diff_emit_submodule_pipethrough(struct diff_options *o,
225 const char *line, int len);
227 enum color_diff {
228 DIFF_RESET = 0,
229 DIFF_CONTEXT = 1,
230 DIFF_METAINFO = 2,
231 DIFF_FRAGINFO = 3,
232 DIFF_FILE_OLD = 4,
233 DIFF_FILE_NEW = 5,
234 DIFF_COMMIT = 6,
235 DIFF_WHITESPACE = 7,
236 DIFF_FUNCINFO = 8,
237 DIFF_FILE_OLD_MOVED = 9,
238 DIFF_FILE_OLD_MOVED_ALT = 10,
239 DIFF_FILE_OLD_MOVED_DIM = 11,
240 DIFF_FILE_OLD_MOVED_ALT_DIM = 12,
241 DIFF_FILE_NEW_MOVED = 13,
242 DIFF_FILE_NEW_MOVED_ALT = 14,
243 DIFF_FILE_NEW_MOVED_DIM = 15,
244 DIFF_FILE_NEW_MOVED_ALT_DIM = 16
246 const char *diff_get_color(int diff_use_color, enum color_diff ix);
247 #define diff_get_color_opt(o, ix) \
248 diff_get_color((o)->use_color, ix)
251 const char *diff_line_prefix(struct diff_options *);
254 extern const char mime_boundary_leader[];
256 extern struct combine_diff_path *diff_tree_paths(
257 struct combine_diff_path *p, const struct object_id *oid,
258 const struct object_id **parents_oid, int nparent,
259 struct strbuf *base, struct diff_options *opt);
260 extern int diff_tree_oid(const struct object_id *old_oid,
261 const struct object_id *new_oid,
262 const char *base, struct diff_options *opt);
263 extern int diff_root_tree_oid(const struct object_id *new_oid, const char *base,
264 struct diff_options *opt);
266 struct combine_diff_path {
267 struct combine_diff_path *next;
268 char *path;
269 unsigned int mode;
270 struct object_id oid;
271 struct combine_diff_parent {
272 char status;
273 unsigned int mode;
274 struct object_id oid;
275 } parent[FLEX_ARRAY];
277 #define combine_diff_path_size(n, l) \
278 st_add4(sizeof(struct combine_diff_path), (l), 1, \
279 st_mult(sizeof(struct combine_diff_parent), (n)))
281 extern void show_combined_diff(struct combine_diff_path *elem, int num_parent,
282 int dense, struct rev_info *);
284 extern void diff_tree_combined(const struct object_id *oid, const struct oid_array *parents, int dense, struct rev_info *rev);
286 extern void diff_tree_combined_merge(const struct commit *commit, int dense, struct rev_info *rev);
288 void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b);
290 extern int diff_can_quit_early(struct diff_options *);
292 extern void diff_addremove(struct diff_options *,
293 int addremove,
294 unsigned mode,
295 const struct object_id *oid,
296 int oid_valid,
297 const char *fullpath, unsigned dirty_submodule);
299 extern void diff_change(struct diff_options *,
300 unsigned mode1, unsigned mode2,
301 const struct object_id *old_oid,
302 const struct object_id *new_oid,
303 int old_oid_valid, int new_oid_valid,
304 const char *fullpath,
305 unsigned dirty_submodule1, unsigned dirty_submodule2);
307 extern struct diff_filepair *diff_unmerge(struct diff_options *, const char *path);
309 #define DIFF_SETUP_REVERSE 1
310 #define DIFF_SETUP_USE_CACHE 2
311 #define DIFF_SETUP_USE_SIZE_CACHE 4
314 * Poor man's alternative to parse-option, to allow both stuck form
315 * (--option=value) and separate form (--option value).
317 extern int parse_long_opt(const char *opt, const char **argv,
318 const char **optarg);
320 extern int git_diff_basic_config(const char *var, const char *value, void *cb);
321 extern int git_diff_heuristic_config(const char *var, const char *value, void *cb);
322 extern void init_diff_ui_defaults(void);
323 extern int git_diff_ui_config(const char *var, const char *value, void *cb);
324 extern void diff_setup(struct diff_options *);
325 extern int diff_opt_parse(struct diff_options *, const char **, int, const char *);
326 extern void diff_setup_done(struct diff_options *);
328 #define DIFF_DETECT_RENAME 1
329 #define DIFF_DETECT_COPY 2
331 #define DIFF_PICKAXE_ALL 1
332 #define DIFF_PICKAXE_REGEX 2
334 #define DIFF_PICKAXE_KIND_S 4 /* traditional plumbing counter */
335 #define DIFF_PICKAXE_KIND_G 8 /* grep in the patch */
336 #define DIFF_PICKAXE_KIND_OBJFIND 16 /* specific object IDs */
338 #define DIFF_PICKAXE_KINDS_MASK (DIFF_PICKAXE_KIND_S | \
339 DIFF_PICKAXE_KIND_G | \
340 DIFF_PICKAXE_KIND_OBJFIND)
342 #define DIFF_PICKAXE_IGNORE_CASE 32
344 extern void diffcore_std(struct diff_options *);
345 extern void diffcore_fix_diff_index(struct diff_options *);
347 #define COMMON_DIFF_OPTIONS_HELP \
348 "\ncommon diff options:\n" \
349 " -z output diff-raw with lines terminated with NUL.\n" \
350 " -p output patch format.\n" \
351 " -u synonym for -p.\n" \
352 " --patch-with-raw\n" \
353 " output both a patch and the diff-raw format.\n" \
354 " --stat show diffstat instead of patch.\n" \
355 " --numstat show numeric diffstat instead of patch.\n" \
356 " --patch-with-stat\n" \
357 " output a patch and prepend its diffstat.\n" \
358 " --name-only show only names of changed files.\n" \
359 " --name-status show names and status of changed files.\n" \
360 " --full-index show full object name on index lines.\n" \
361 " --abbrev=<n> abbreviate object names in diff-tree header and diff-raw.\n" \
362 " -R swap input file pairs.\n" \
363 " -B detect complete rewrites.\n" \
364 " -M detect renames.\n" \
365 " -C detect copies.\n" \
366 " --find-copies-harder\n" \
367 " try unchanged files as candidate for copy detection.\n" \
368 " -l<n> limit rename attempts up to <n> paths.\n" \
369 " -O<file> reorder diffs according to the <file>.\n" \
370 " -S<string> find filepair whose only one side contains the string.\n" \
371 " --pickaxe-all\n" \
372 " show all files diff when -S is used and hit is found.\n" \
373 " -a --text treat all files as text.\n"
375 extern int diff_queue_is_empty(void);
376 extern void diff_flush(struct diff_options*);
377 extern void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc);
379 /* diff-raw status letters */
380 #define DIFF_STATUS_ADDED 'A'
381 #define DIFF_STATUS_COPIED 'C'
382 #define DIFF_STATUS_DELETED 'D'
383 #define DIFF_STATUS_MODIFIED 'M'
384 #define DIFF_STATUS_RENAMED 'R'
385 #define DIFF_STATUS_TYPE_CHANGED 'T'
386 #define DIFF_STATUS_UNKNOWN 'X'
387 #define DIFF_STATUS_UNMERGED 'U'
389 /* these are not diff-raw status letters proper, but used by
390 * diffcore-filter insn to specify additional restrictions.
392 #define DIFF_STATUS_FILTER_AON '*'
393 #define DIFF_STATUS_FILTER_BROKEN 'B'
396 * This is different from find_unique_abbrev() in that
397 * it stuffs the result with dots for alignment.
399 extern const char *diff_aligned_abbrev(const struct object_id *sha1, int);
401 /* do not report anything on removed paths */
402 #define DIFF_SILENT_ON_REMOVED 01
403 /* report racily-clean paths as modified */
404 #define DIFF_RACY_IS_MODIFIED 02
405 extern int run_diff_files(struct rev_info *revs, unsigned int option);
406 extern int run_diff_index(struct rev_info *revs, int cached);
408 extern int do_diff_cache(const struct object_id *, struct diff_options *);
409 extern int diff_flush_patch_id(struct diff_options *, struct object_id *, int);
411 extern int diff_result_code(struct diff_options *, int);
413 extern void diff_no_index(struct rev_info *, int, const char **);
415 extern int index_differs_from(const char *def, const struct diff_flags *flags,
416 int ita_invisible_in_index);
419 * Fill the contents of the filespec "df", respecting any textconv defined by
420 * its userdiff driver. The "driver" parameter must come from a
421 * previous call to get_textconv(), and therefore should either be NULL or have
422 * textconv enabled.
424 * Note that the memory ownership of the resulting buffer depends on whether
425 * the driver field is NULL. If it is, then the memory belongs to the filespec
426 * struct. If it is non-NULL, then "outbuf" points to a newly allocated buffer
427 * that should be freed by the caller.
429 extern size_t fill_textconv(struct userdiff_driver *driver,
430 struct diff_filespec *df,
431 char **outbuf);
434 * Look up the userdiff driver for the given filespec, and return it if
435 * and only if it has textconv enabled (otherwise return NULL). The result
436 * can be passed to fill_textconv().
438 extern struct userdiff_driver *get_textconv(struct diff_filespec *one);
441 * Prepare diff_filespec and convert it using diff textconv API
442 * if the textconv driver exists.
443 * Return 1 if the conversion succeeds, 0 otherwise.
445 extern int textconv_object(const char *path, unsigned mode, const struct object_id *oid, int oid_valid, char **buf, unsigned long *buf_size);
447 extern int parse_rename_score(const char **cp_p);
449 extern long parse_algorithm_value(const char *value);
451 extern void print_stat_summary(FILE *fp, int files,
452 int insertions, int deletions);
453 extern void setup_diff_pager(struct diff_options *);
455 #endif /* DIFF_H */