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"
10#include "oidset.h"
11struct rev_info;
13struct diff_options;
14struct diff_queue_struct;
15struct strbuf;
16struct diff_filespec;
17struct userdiff_driver;
18struct oid_array;
19struct commit;
20struct combine_diff_path;
21struct repository;
22typedef int (*pathchange_fn_t)(struct diff_options *options,
24 struct combine_diff_path *path);
25typedef void (*change_fn_t)(struct diff_options *options,
27 unsigned old_mode, unsigned new_mode,
28 const struct object_id *old_oid,
29 const struct object_id *new_oid,
30 int old_oid_valid, int new_oid_valid,
31 const char *fullpath,
32 unsigned old_dirty_submodule, unsigned new_dirty_submodule);
33typedef void (*add_remove_fn_t)(struct diff_options *options,
35 int addremove, unsigned mode,
36 const struct object_id *oid,
37 int oid_valid,
38 const char *fullpath, unsigned dirty_submodule);
39typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
41 struct diff_options *options, void *data);
42typedef struct strbuf *(*diff_prefix_fn_t)(struct diff_options *opt, void *data);
44#define DIFF_FORMAT_RAW 0x0001
46#define DIFF_FORMAT_DIFFSTAT 0x0002
47#define DIFF_FORMAT_NUMSTAT 0x0004
48#define DIFF_FORMAT_SUMMARY 0x0008
49#define DIFF_FORMAT_PATCH 0x0010
50#define DIFF_FORMAT_SHORTSTAT 0x0020
51#define DIFF_FORMAT_DIRSTAT 0x0040
52/* These override all above */
54#define DIFF_FORMAT_NAME 0x0100
55#define DIFF_FORMAT_NAME_STATUS 0x0200
56#define DIFF_FORMAT_CHECKDIFF 0x0400
57/* Same as output_format = 0 but we know that -s flag was given
59 * and we should not give default value to output_format.
60 */
61#define DIFF_FORMAT_NO_OUTPUT 0x0800
62#define DIFF_FORMAT_CALLBACK 0x1000
64#define DIFF_FLAGS_INIT { 0 }
66struct diff_flags {
67 unsigned recursive:1;
68 unsigned tree_in_recursive:1;
69 unsigned binary:1;
70 unsigned text:1;
71 unsigned full_index:1;
72 unsigned silent_on_remove:1;
73 unsigned find_copies_harder:1;
74 unsigned follow_renames:1;
75 unsigned rename_empty:1;
76 unsigned has_changes:1;
77 unsigned quick:1;
78 unsigned no_index:1;
79 unsigned allow_external:1;
80 unsigned exit_with_status:1;
81 unsigned reverse_diff:1;
82 unsigned check_failed:1;
83 unsigned relative_name:1;
84 unsigned ignore_submodules:1;
85 unsigned dirstat_cumulative:1;
86 unsigned dirstat_by_file:1;
87 unsigned allow_textconv:1;
88 unsigned textconv_set_via_cmdline:1;
89 unsigned diff_from_contents:1;
90 unsigned dirty_submodules:1;
91 unsigned ignore_untracked_in_submodules:1;
92 unsigned ignore_dirty_submodules:1;
93 unsigned override_submodule_config:1;
94 unsigned dirstat_by_line:1;
95 unsigned funccontext:1;
96 unsigned default_follow_renames:1;
97 unsigned stat_with_summary:1;
98 unsigned suppress_diff_headers:1;
99 unsigned dual_color_diffed_diffs:1;
100};
101static inline void diff_flags_or(struct diff_flags *a,
103 const struct diff_flags *b)
104{
105 char *tmp_a = (char *)a;
106 const char *tmp_b = (const char *)b;
107 int i;
108 for (i = 0; i < sizeof(struct diff_flags); i++)
110 tmp_a[i] |= tmp_b[i];
111}
112#define DIFF_XDL_TST(opts, flag) ((opts)->xdl_opts & XDF_##flag)
114#define DIFF_XDL_SET(opts, flag) ((opts)->xdl_opts |= XDF_##flag)
115#define DIFF_XDL_CLR(opts, flag) ((opts)->xdl_opts &= ~XDF_##flag)
116#define DIFF_WITH_ALG(opts, flag) (((opts)->xdl_opts & ~XDF_DIFF_ALGORITHM_MASK) | XDF_##flag)
118enum diff_words_type {
120 DIFF_WORDS_NONE = 0,
121 DIFF_WORDS_PORCELAIN,
122 DIFF_WORDS_PLAIN,
123 DIFF_WORDS_COLOR
124};
125enum diff_submodule_format {
127 DIFF_SUBMODULE_SHORT = 0,
128 DIFF_SUBMODULE_LOG,
129 DIFF_SUBMODULE_INLINE_DIFF
130};
131struct diff_options {
133 const char *orderfile;
134 const char *pickaxe;
135 const char *single_follow;
136 const char *a_prefix, *b_prefix;
137 const char *line_prefix;
138 size_t line_prefix_length;
139 struct diff_flags flags;
140 /* diff-filter bits */
142 unsigned int filter;
143 int use_color;
145 int context;
146 int interhunkcontext;
147 int break_opt;
148 int detect_rename;
149 int irreversible_delete;
150 int skip_stat_unmatch;
151 int line_termination;
152 int output_format;
153 unsigned pickaxe_opts;
154 int rename_score;
155 int rename_limit;
156 int needed_rename_limit;
157 int degraded_cc_to_c;
158 int show_rename_progress;
159 int dirstat_permille;
160 int setup;
161 int abbrev;
162 int ita_invisible_in_index;
163/* white-space error highlighting */
164#define WSEH_NEW (1<<12)
165#define WSEH_CONTEXT (1<<13)
166#define WSEH_OLD (1<<14)
167 unsigned ws_error_highlight;
168 const char *prefix;
169 int prefix_length;
170 const char *stat_sep;
171 long xdl_opts;
172 /* see Documentation/diff-options.txt */
174 char **anchors;
175 size_t anchors_nr, anchors_alloc;
176 int stat_width;
178 int stat_name_width;
179 int stat_graph_width;
180 int stat_count;
181 const char *word_regex;
182 enum diff_words_type word_diff;
183 enum diff_submodule_format submodule_format;
184 struct oidset *objfind;
186 /* this is set by diffcore for DIFF_FORMAT_PATCH */
188 int found_changes;
189 /* to support internal diff recursion by --follow hack*/
191 int found_follow;
192 void (*set_default)(struct diff_options *);
194 FILE *file;
196 int close_file;
197#define OUTPUT_INDICATOR_NEW 0
199#define OUTPUT_INDICATOR_OLD 1
200#define OUTPUT_INDICATOR_CONTEXT 2
201 char output_indicators[3];
202 struct pathspec pathspec;
204 pathchange_fn_t pathchange;
205 change_fn_t change;
206 add_remove_fn_t add_remove;
207 void *change_fn_data;
208 diff_format_fn_t format_callback;
209 void *format_callback_data;
210 diff_prefix_fn_t output_prefix;
211 void *output_prefix_data;
212 int diff_path_counter;
214 struct emitted_diff_symbols *emitted_symbols;
216 enum {
217 COLOR_MOVED_NO = 0,
218 COLOR_MOVED_PLAIN = 1,
219 COLOR_MOVED_BLOCKS = 2,
220 COLOR_MOVED_ZEBRA = 3,
221 COLOR_MOVED_ZEBRA_DIM = 4,
222 } color_moved;
223 #define COLOR_MOVED_DEFAULT COLOR_MOVED_ZEBRA
224 #define COLOR_MOVED_MIN_ALNUM_COUNT 20
225 /* XDF_WHITESPACE_FLAGS regarding block detection are set at 2, 3, 4 */
227 #define COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE (1<<5)
228 int color_moved_ws_handling;
229 struct repository *repo;
231};
232void diff_emit_submodule_del(struct diff_options *o, const char *line);
234void diff_emit_submodule_add(struct diff_options *o, const char *line);
235void diff_emit_submodule_untracked(struct diff_options *o, const char *path);
236void diff_emit_submodule_modified(struct diff_options *o, const char *path);
237void diff_emit_submodule_header(struct diff_options *o, const char *header);
238void diff_emit_submodule_error(struct diff_options *o, const char *err);
239void diff_emit_submodule_pipethrough(struct diff_options *o,
240 const char *line, int len);
241enum color_diff {
243 DIFF_RESET = 0,
244 DIFF_CONTEXT = 1,
245 DIFF_METAINFO = 2,
246 DIFF_FRAGINFO = 3,
247 DIFF_FILE_OLD = 4,
248 DIFF_FILE_NEW = 5,
249 DIFF_COMMIT = 6,
250 DIFF_WHITESPACE = 7,
251 DIFF_FUNCINFO = 8,
252 DIFF_FILE_OLD_MOVED = 9,
253 DIFF_FILE_OLD_MOVED_ALT = 10,
254 DIFF_FILE_OLD_MOVED_DIM = 11,
255 DIFF_FILE_OLD_MOVED_ALT_DIM = 12,
256 DIFF_FILE_NEW_MOVED = 13,
257 DIFF_FILE_NEW_MOVED_ALT = 14,
258 DIFF_FILE_NEW_MOVED_DIM = 15,
259 DIFF_FILE_NEW_MOVED_ALT_DIM = 16,
260 DIFF_CONTEXT_DIM = 17,
261 DIFF_FILE_OLD_DIM = 18,
262 DIFF_FILE_NEW_DIM = 19,
263 DIFF_CONTEXT_BOLD = 20,
264 DIFF_FILE_OLD_BOLD = 21,
265 DIFF_FILE_NEW_BOLD = 22,
266};
267const char *diff_get_color(int diff_use_color, enum color_diff ix);
268#define diff_get_color_opt(o, ix) \
269 diff_get_color((o)->use_color, ix)
270const char *diff_line_prefix(struct diff_options *);
273extern const char mime_boundary_leader[];
276struct combine_diff_path *diff_tree_paths(
278 struct combine_diff_path *p, const struct object_id *oid,
279 const struct object_id **parents_oid, int nparent,
280 struct strbuf *base, struct diff_options *opt);
281int diff_tree_oid(const struct object_id *old_oid,
282 const struct object_id *new_oid,
283 const char *base, struct diff_options *opt);
284int diff_root_tree_oid(const struct object_id *new_oid, const char *base,
285 struct diff_options *opt);
286struct combine_diff_path {
288 struct combine_diff_path *next;
289 char *path;
290 unsigned int mode;
291 struct object_id oid;
292 struct combine_diff_parent {
293 char status;
294 unsigned int mode;
295 struct object_id oid;
296 } parent[FLEX_ARRAY];
297};
298#define combine_diff_path_size(n, l) \
299 st_add4(sizeof(struct combine_diff_path), (l), 1, \
300 st_mult(sizeof(struct combine_diff_parent), (n)))
301void show_combined_diff(struct combine_diff_path *elem, int num_parent,
303 int dense, struct rev_info *);
304void diff_tree_combined(const struct object_id *oid, const struct oid_array *parents, int dense, struct rev_info *rev);
306void diff_tree_combined_merge(const struct commit *commit, int dense, struct rev_info *rev);
308void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b);
310int diff_can_quit_early(struct diff_options *);
312void diff_addremove(struct diff_options *,
314 int addremove,
315 unsigned mode,
316 const struct object_id *oid,
317 int oid_valid,
318 const char *fullpath, unsigned dirty_submodule);
319void diff_change(struct diff_options *,
321 unsigned mode1, unsigned mode2,
322 const struct object_id *old_oid,
323 const struct object_id *new_oid,
324 int old_oid_valid, int new_oid_valid,
325 const char *fullpath,
326 unsigned dirty_submodule1, unsigned dirty_submodule2);
327struct diff_filepair *diff_unmerge(struct diff_options *, const char *path);
329#define DIFF_SETUP_REVERSE 1
331#define DIFF_SETUP_USE_SIZE_CACHE 4
332/*
334 * Poor man's alternative to parse-option, to allow both stuck form
335 * (--option=value) and separate form (--option value).
336 */
337int parse_long_opt(const char *opt, const char **argv,
338 const char **optarg);
339int git_diff_basic_config(const char *var, const char *value, void *cb);
341int git_diff_heuristic_config(const char *var, const char *value, void *cb);
342void init_diff_ui_defaults(void);
343int git_diff_ui_config(const char *var, const char *value, void *cb);
344#ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
345#define diff_setup(diffopts) repo_diff_setup(the_repository, diffopts)
346#endif
347void repo_diff_setup(struct repository *, struct diff_options *);
348int diff_opt_parse(struct diff_options *, const char **, int, const char *);
349void diff_setup_done(struct diff_options *);
350int git_config_rename(const char *var, const char *value);
351#define DIFF_DETECT_RENAME 1
353#define DIFF_DETECT_COPY 2
354#define DIFF_PICKAXE_ALL 1
356#define DIFF_PICKAXE_REGEX 2
357#define DIFF_PICKAXE_KIND_S 4 /* traditional plumbing counter */
359#define DIFF_PICKAXE_KIND_G 8 /* grep in the patch */
360#define DIFF_PICKAXE_KIND_OBJFIND 16 /* specific object IDs */
361#define DIFF_PICKAXE_KINDS_MASK (DIFF_PICKAXE_KIND_S | \
363 DIFF_PICKAXE_KIND_G | \
364 DIFF_PICKAXE_KIND_OBJFIND)
365#define DIFF_PICKAXE_IGNORE_CASE 32
367void diffcore_std(struct diff_options *);
369void diffcore_fix_diff_index(struct diff_options *);
370#define COMMON_DIFF_OPTIONS_HELP \
372"\ncommon diff options:\n" \
373" -z output diff-raw with lines terminated with NUL.\n" \
374" -p output patch format.\n" \
375" -u synonym for -p.\n" \
376" --patch-with-raw\n" \
377" output both a patch and the diff-raw format.\n" \
378" --stat show diffstat instead of patch.\n" \
379" --numstat show numeric diffstat instead of patch.\n" \
380" --patch-with-stat\n" \
381" output a patch and prepend its diffstat.\n" \
382" --name-only show only names of changed files.\n" \
383" --name-status show names and status of changed files.\n" \
384" --full-index show full object name on index lines.\n" \
385" --abbrev=<n> abbreviate object names in diff-tree header and diff-raw.\n" \
386" -R swap input file pairs.\n" \
387" -B detect complete rewrites.\n" \
388" -M detect renames.\n" \
389" -C detect copies.\n" \
390" --find-copies-harder\n" \
391" try unchanged files as candidate for copy detection.\n" \
392" -l<n> limit rename attempts up to <n> paths.\n" \
393" -O<file> reorder diffs according to the <file>.\n" \
394" -S<string> find filepair whose only one side contains the string.\n" \
395" --pickaxe-all\n" \
396" show all files diff when -S is used and hit is found.\n" \
397" -a --text treat all files as text.\n"
398int diff_queue_is_empty(void);
400void diff_flush(struct diff_options*);
401void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc);
402/* diff-raw status letters */
404#define DIFF_STATUS_ADDED 'A'
405#define DIFF_STATUS_COPIED 'C'
406#define DIFF_STATUS_DELETED 'D'
407#define DIFF_STATUS_MODIFIED 'M'
408#define DIFF_STATUS_RENAMED 'R'
409#define DIFF_STATUS_TYPE_CHANGED 'T'
410#define DIFF_STATUS_UNKNOWN 'X'
411#define DIFF_STATUS_UNMERGED 'U'
412/* these are not diff-raw status letters proper, but used by
414 * diffcore-filter insn to specify additional restrictions.
415 */
416#define DIFF_STATUS_FILTER_AON '*'
417#define DIFF_STATUS_FILTER_BROKEN 'B'
418/*
420 * This is different from find_unique_abbrev() in that
421 * it stuffs the result with dots for alignment.
422 */
423const char *diff_aligned_abbrev(const struct object_id *sha1, int);
424/* do not report anything on removed paths */
426#define DIFF_SILENT_ON_REMOVED 01
427/* report racily-clean paths as modified */
428#define DIFF_RACY_IS_MODIFIED 02
429int run_diff_files(struct rev_info *revs, unsigned int option);
430int run_diff_index(struct rev_info *revs, int cached);
431int do_diff_cache(const struct object_id *, struct diff_options *);
433int diff_flush_patch_id(struct diff_options *, struct object_id *, int);
434int diff_result_code(struct diff_options *, int);
436void diff_no_index(struct repository *, struct rev_info *, int, const char **);
438int index_differs_from(struct repository *r, const char *def,
440 const struct diff_flags *flags,
441 int ita_invisible_in_index);
442/*
444 * Fill the contents of the filespec "df", respecting any textconv defined by
445 * its userdiff driver. The "driver" parameter must come from a
446 * previous call to get_textconv(), and therefore should either be NULL or have
447 * textconv enabled.
448 *
449 * Note that the memory ownership of the resulting buffer depends on whether
450 * the driver field is NULL. If it is, then the memory belongs to the filespec
451 * struct. If it is non-NULL, then "outbuf" points to a newly allocated buffer
452 * that should be freed by the caller.
453 */
454size_t fill_textconv(struct repository *r,
455 struct userdiff_driver *driver,
456 struct diff_filespec *df,
457 char **outbuf);
458/*
460 * Look up the userdiff driver for the given filespec, and return it if
461 * and only if it has textconv enabled (otherwise return NULL). The result
462 * can be passed to fill_textconv().
463 */
464struct userdiff_driver *get_textconv(struct repository *r,
465 struct diff_filespec *one);
466/*
468 * Prepare diff_filespec and convert it using diff textconv API
469 * if the textconv driver exists.
470 * Return 1 if the conversion succeeds, 0 otherwise.
471 */
472int textconv_object(struct repository *repo,
473 const char *path,
474 unsigned mode,
475 const struct object_id *oid, int oid_valid,
476 char **buf, unsigned long *buf_size);
477int parse_rename_score(const char **cp_p);
479long parse_algorithm_value(const char *value);
481void print_stat_summary(FILE *fp, int files,
483 int insertions, int deletions);
484void setup_diff_pager(struct diff_options *);
485#endif /* DIFF_H */