[thirdparty/git.git] / diff.h

/*
 * Copyright (C) 2005 Junio C Hamano
 */
#ifndef DIFF_H
#define DIFF_H

#include "tree-walk.h"
#include "pathspec.h"
#include "object.h"

struct rev_info;
struct diff_options;
struct diff_queue_struct;
struct strbuf;
struct diff_filespec;
struct userdiff_driver;
struct sha1_array;
struct commit;
struct combine_diff_path;

typedef int (*pathchange_fn_t)(struct diff_options *options,
		 struct combine_diff_path *path);

typedef void (*change_fn_t)(struct diff_options *options,
		 unsigned old_mode, unsigned new_mode,
		 const unsigned char *old_sha1,
		 const unsigned char *new_sha1,
		 int old_sha1_valid, int new_sha1_valid,
		 const char *fullpath,
		 unsigned old_dirty_submodule, unsigned new_dirty_submodule);

typedef void (*add_remove_fn_t)(struct diff_options *options,
		    int addremove, unsigned mode,
		    const unsigned char *sha1,
		    int sha1_valid,
		    const char *fullpath, unsigned dirty_submodule);

typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
		struct diff_options *options, void *data);

typedef struct strbuf *(*diff_prefix_fn_t)(struct diff_options *opt, void *data);

#define DIFF_FORMAT_RAW		0x0001
#define DIFF_FORMAT_DIFFSTAT	0x0002
#define DIFF_FORMAT_NUMSTAT	0x0004
#define DIFF_FORMAT_SUMMARY	0x0008
#define DIFF_FORMAT_PATCH	0x0010
#define DIFF_FORMAT_SHORTSTAT	0x0020
#define DIFF_FORMAT_DIRSTAT	0x0040

/* These override all above */
#define DIFF_FORMAT_NAME	0x0100
#define DIFF_FORMAT_NAME_STATUS	0x0200
#define DIFF_FORMAT_CHECKDIFF	0x0400

/* Same as output_format = 0 but we know that -s flag was given
 * and we should not give default value to output_format.
 */
#define DIFF_FORMAT_NO_OUTPUT	0x0800

#define DIFF_FORMAT_CALLBACK	0x1000

#define DIFF_OPT_RECURSIVE           (1 <<  0)
#define DIFF_OPT_TREE_IN_RECURSIVE   (1 <<  1)
#define DIFF_OPT_BINARY              (1 <<  2)
#define DIFF_OPT_TEXT                (1 <<  3)
#define DIFF_OPT_FULL_INDEX          (1 <<  4)
#define DIFF_OPT_SILENT_ON_REMOVE    (1 <<  5)
#define DIFF_OPT_FIND_COPIES_HARDER  (1 <<  6)
#define DIFF_OPT_FOLLOW_RENAMES      (1 <<  7)
#define DIFF_OPT_RENAME_EMPTY        (1 <<  8)
/* (1 <<  9) unused */
#define DIFF_OPT_HAS_CHANGES         (1 << 10)
#define DIFF_OPT_QUICK               (1 << 11)
#define DIFF_OPT_NO_INDEX            (1 << 12)
#define DIFF_OPT_ALLOW_EXTERNAL      (1 << 13)
#define DIFF_OPT_EXIT_WITH_STATUS    (1 << 14)
#define DIFF_OPT_REVERSE_DIFF        (1 << 15)
#define DIFF_OPT_CHECK_FAILED        (1 << 16)
#define DIFF_OPT_RELATIVE_NAME       (1 << 17)
#define DIFF_OPT_IGNORE_SUBMODULES   (1 << 18)
#define DIFF_OPT_DIRSTAT_CUMULATIVE  (1 << 19)
#define DIFF_OPT_DIRSTAT_BY_FILE     (1 << 20)
#define DIFF_OPT_ALLOW_TEXTCONV      (1 << 21)
#define DIFF_OPT_DIFF_FROM_CONTENTS  (1 << 22)
#define DIFF_OPT_SUBMODULE_LOG       (1 << 23)
#define DIFF_OPT_DIRTY_SUBMODULES    (1 << 24)
#define DIFF_OPT_IGNORE_UNTRACKED_IN_SUBMODULES (1 << 25)
#define DIFF_OPT_IGNORE_DIRTY_SUBMODULES (1 << 26)
#define DIFF_OPT_OVERRIDE_SUBMODULE_CONFIG (1 << 27)
#define DIFF_OPT_DIRSTAT_BY_LINE     (1 << 28)
#define DIFF_OPT_FUNCCONTEXT         (1 << 29)
#define DIFF_OPT_PICKAXE_IGNORE_CASE (1 << 30)
#define DIFF_OPT_DEFAULT_FOLLOW_RENAMES (1U << 31)

#define DIFF_OPT_TST(opts, flag)    ((opts)->flags & DIFF_OPT_##flag)
#define DIFF_OPT_TOUCHED(opts, flag)    ((opts)->touched_flags & DIFF_OPT_##flag)
#define DIFF_OPT_SET(opts, flag)    (((opts)->flags |= DIFF_OPT_##flag),((opts)->touched_flags |= DIFF_OPT_##flag))
#define DIFF_OPT_CLR(opts, flag)    (((opts)->flags &= ~DIFF_OPT_##flag),((opts)->touched_flags |= DIFF_OPT_##flag))
#define DIFF_XDL_TST(opts, flag)    ((opts)->xdl_opts & XDF_##flag)
#define DIFF_XDL_SET(opts, flag)    ((opts)->xdl_opts |= XDF_##flag)
#define DIFF_XDL_CLR(opts, flag)    ((opts)->xdl_opts &= ~XDF_##flag)

#define DIFF_WITH_ALG(opts, flag)   (((opts)->xdl_opts & ~XDF_DIFF_ALGORITHM_MASK) | XDF_##flag)

enum diff_words_type {
	DIFF_WORDS_NONE = 0,
	DIFF_WORDS_PORCELAIN,
	DIFF_WORDS_PLAIN,
	DIFF_WORDS_COLOR
};

struct diff_options {
	const char *orderfile;
	const char *pickaxe;
	const char *single_follow;
	const char *a_prefix, *b_prefix;
	const char *line_prefix;
	size_t line_prefix_length;
	unsigned flags;
	unsigned touched_flags;

	/* diff-filter bits */
	unsigned int filter;

	int use_color;
	int context;
	int interhunkcontext;
	int break_opt;
	int detect_rename;
	int irreversible_delete;
	int skip_stat_unmatch;
	int line_termination;
	int output_format;
	int pickaxe_opts;
	int rename_score;
	int rename_limit;
	int needed_rename_limit;
	int degraded_cc_to_c;
	int show_rename_progress;
	int dirstat_permille;
	int setup;
	int abbrev;
/* white-space error highlighting */
#define WSEH_NEW 1
#define WSEH_CONTEXT 2
#define WSEH_OLD 4
	unsigned ws_error_highlight;
	const char *prefix;
	int prefix_length;
	const char *stat_sep;
	long xdl_opts;

	int stat_width;
	int stat_name_width;
	int stat_graph_width;
	int stat_count;
	const char *word_regex;
	enum diff_words_type word_diff;

	/* this is set by diffcore for DIFF_FORMAT_PATCH */
	int found_changes;

	/* to support internal diff recursion by --follow hack*/
	int found_follow;

	void (*set_default)(struct diff_options *);

	FILE *file;
	int close_file;

	struct pathspec pathspec;
	pathchange_fn_t pathchange;
	change_fn_t change;
	add_remove_fn_t add_remove;
	diff_format_fn_t format_callback;
	void *format_callback_data;
	diff_prefix_fn_t output_prefix;
	void *output_prefix_data;

	int diff_path_counter;
};

enum color_diff {
	DIFF_RESET = 0,
	DIFF_CONTEXT = 1,
	DIFF_METAINFO = 2,
	DIFF_FRAGINFO = 3,
	DIFF_FILE_OLD = 4,
	DIFF_FILE_NEW = 5,
	DIFF_COMMIT = 6,
	DIFF_WHITESPACE = 7,
	DIFF_FUNCINFO = 8
};
const char *diff_get_color(int diff_use_color, enum color_diff ix);
#define diff_get_color_opt(o, ix) \
	diff_get_color((o)->use_color, ix)


const char *diff_line_prefix(struct diff_options *);


extern const char mime_boundary_leader[];

extern struct combine_diff_path *diff_tree_paths(
	struct combine_diff_path *p, const unsigned char *sha1,
	const unsigned char **parent_sha1, int nparent,
	struct strbuf *base, struct diff_options *opt);
extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
			  const char *base, struct diff_options *opt);
extern int diff_root_tree_sha1(const unsigned char *new, const char *base,
                               struct diff_options *opt);

struct combine_diff_path {
	struct combine_diff_path *next;
	char *path;
	unsigned int mode;
	struct object_id oid;
	struct combine_diff_parent {
		char status;
		unsigned int mode;
		struct object_id oid;
	} parent[FLEX_ARRAY];
};
#define combine_diff_path_size(n, l) \
	st_add4(sizeof(struct combine_diff_path), (l), 1, \
		st_mult(sizeof(struct combine_diff_parent), (n)))

extern void show_combined_diff(struct combine_diff_path *elem, int num_parent,
			      int dense, struct rev_info *);

extern void diff_tree_combined(const unsigned char *sha1, const struct sha1_array *parents, int dense, struct rev_info *rev);

extern void diff_tree_combined_merge(const struct commit *commit, int dense, struct rev_info *rev);

void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b);

extern int diff_can_quit_early(struct diff_options *);

extern void diff_addremove(struct diff_options *,
			   int addremove,
			   unsigned mode,
			   const unsigned char *sha1,
			   int sha1_valid,
			   const char *fullpath, unsigned dirty_submodule);

extern void diff_change(struct diff_options *,
			unsigned mode1, unsigned mode2,
			const unsigned char *sha1,
			const unsigned char *sha2,
			int sha1_valid,
			int sha2_valid,
			const char *fullpath,
			unsigned dirty_submodule1, unsigned dirty_submodule2);

extern struct diff_filepair *diff_unmerge(struct diff_options *, const char *path);

#define DIFF_SETUP_REVERSE      	1
#define DIFF_SETUP_USE_CACHE		2
#define DIFF_SETUP_USE_SIZE_CACHE	4

/*
 * Poor man's alternative to parse-option, to allow both stuck form
 * (--option=value) and separate form (--option value).
 */
extern int parse_long_opt(const char *opt, const char **argv,
			 const char **optarg);

extern int git_diff_basic_config(const char *var, const char *value, void *cb);
extern void init_diff_ui_defaults(void);
extern int git_diff_ui_config(const char *var, const char *value, void *cb);
extern void diff_setup(struct diff_options *);
extern int diff_opt_parse(struct diff_options *, const char **, int, const char *);
extern void diff_setup_done(struct diff_options *);

#define DIFF_DETECT_RENAME	1
#define DIFF_DETECT_COPY	2

#define DIFF_PICKAXE_ALL	1
#define DIFF_PICKAXE_REGEX	2

#define DIFF_PICKAXE_KIND_S	4 /* traditional plumbing counter */
#define DIFF_PICKAXE_KIND_G	8 /* grep in the patch */

extern void diffcore_std(struct diff_options *);
extern void diffcore_fix_diff_index(struct diff_options *);

#define COMMON_DIFF_OPTIONS_HELP \
"\ncommon diff options:\n" \
"  -z            output diff-raw with lines terminated with NUL.\n" \
"  -p            output patch format.\n" \
"  -u            synonym for -p.\n" \
"  --patch-with-raw\n" \
"                output both a patch and the diff-raw format.\n" \
"  --stat        show diffstat instead of patch.\n" \
"  --numstat     show numeric diffstat instead of patch.\n" \
"  --patch-with-stat\n" \
"                output a patch and prepend its diffstat.\n" \
"  --name-only   show only names of changed files.\n" \
"  --name-status show names and status of changed files.\n" \
"  --full-index  show full object name on index lines.\n" \
"  --abbrev=<n>  abbreviate object names in diff-tree header and diff-raw.\n" \
"  -R            swap input file pairs.\n" \
"  -B            detect complete rewrites.\n" \
"  -M            detect renames.\n" \
"  -C            detect copies.\n" \
"  --find-copies-harder\n" \
"                try unchanged files as candidate for copy detection.\n" \
"  -l<n>         limit rename attempts up to <n> paths.\n" \
"  -O<file>      reorder diffs according to the <file>.\n" \
"  -S<string>    find filepair whose only one side contains the string.\n" \
"  --pickaxe-all\n" \
"                show all files diff when -S is used and hit is found.\n" \
"  -a  --text    treat all files as text.\n"

extern int diff_queue_is_empty(void);
extern void diff_flush(struct diff_options*);
extern void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc);

/* diff-raw status letters */
#define DIFF_STATUS_ADDED		'A'
#define DIFF_STATUS_COPIED		'C'
#define DIFF_STATUS_DELETED		'D'
#define DIFF_STATUS_MODIFIED		'M'
#define DIFF_STATUS_RENAMED		'R'
#define DIFF_STATUS_TYPE_CHANGED	'T'
#define DIFF_STATUS_UNKNOWN		'X'
#define DIFF_STATUS_UNMERGED		'U'

/* these are not diff-raw status letters proper, but used by
 * diffcore-filter insn to specify additional restrictions.
 */
#define DIFF_STATUS_FILTER_AON		'*'
#define DIFF_STATUS_FILTER_BROKEN	'B'

extern const char *diff_unique_abbrev(const unsigned char *, int);

/* do not report anything on removed paths */
#define DIFF_SILENT_ON_REMOVED 01
/* report racily-clean paths as modified */
#define DIFF_RACY_IS_MODIFIED 02
extern int run_diff_files(struct rev_info *revs, unsigned int option);
extern int run_diff_index(struct rev_info *revs, int cached);

extern int do_diff_cache(const unsigned char *, struct diff_options *);
extern int diff_flush_patch_id(struct diff_options *, unsigned char *);

extern int diff_result_code(struct diff_options *, int);

extern void diff_no_index(struct rev_info *, int, const char **);

extern int index_differs_from(const char *def, int diff_flags);

/*
 * Fill the contents of the filespec "df", respecting any textconv defined by
 * its userdiff driver.  The "driver" parameter must come from a
 * previous call to get_textconv(), and therefore should either be NULL or have
 * textconv enabled.
 *
 * Note that the memory ownership of the resulting buffer depends on whether
 * the driver field is NULL. If it is, then the memory belongs to the filespec
 * struct. If it is non-NULL, then "outbuf" points to a newly allocated buffer
 * that should be freed by the caller.
 */
extern size_t fill_textconv(struct userdiff_driver *driver,
			    struct diff_filespec *df,
			    char **outbuf);

/*
 * Look up the userdiff driver for the given filespec, and return it if
 * and only if it has textconv enabled (otherwise return NULL). The result
 * can be passed to fill_textconv().
 */
extern struct userdiff_driver *get_textconv(struct diff_filespec *one);

extern int parse_rename_score(const char **cp_p);

extern long parse_algorithm_value(const char *value);

extern int print_stat_summary(FILE *fp, int files,
			      int insertions, int deletions);
extern void setup_diff_pager(struct diff_options *);

#endif /* DIFF_H */
Commit	Line	Data
be3cfa85 JH	1	/*
	2	* Copyright (C) 2005 Junio C Hamano
	3	*/
86436c28 JH	4	#ifndef DIFF_H
	5	#define DIFF_H
	6
1b0c7174	7	#include "tree-walk.h"
64acde94	8	#include "pathspec.h"
1ff57c13	9	#include "object.h"
50f9a858	10
91539833	11	struct rev_info;
ac1b3d12	12	struct diff_options;
04245581	13	struct diff_queue_struct;
a3c158d4	14	struct strbuf;
a788d7d5 AB	15	struct diff_filespec;
a788d7d5 AB	16	struct userdiff_driver;
0041f09d	17	struct sha1_array;
82889295	18	struct commit;
72441af7 KS	19	struct combine_diff_path;
	20
	21	typedef int (pathchange_fn_t)(struct diff_options options,
	22	struct combine_diff_path *path);
ac1b3d12 LT	23
	24	typedef void (change_fn_t)(struct diff_options options,
	25	unsigned old_mode, unsigned new_mode,
	26	const unsigned char *old_sha1,
	27	const unsigned char *new_sha1,
e5450100	28	int old_sha1_valid, int new_sha1_valid,
e3d42c47 JL	29	const char *fullpath,
e3d42c47 JL	30	unsigned old_dirty_submodule, unsigned new_dirty_submodule);
ac1b3d12 LT	31
	32	typedef void (add_remove_fn_t)(struct diff_options options,
	33	int addremove, unsigned mode,
	34	const unsigned char *sha1,
e5450100	35	int sha1_valid,
e3d42c47	36	const char *fullpath, unsigned dirty_submodule);
ac1b3d12	37
04245581 JK	38	typedef void (diff_format_fn_t)(struct diff_queue_struct q,
	39	struct diff_options options, void data);
	40
a3c158d4 BY	41	typedef struct strbuf (diff_prefix_fn_t)(struct diff_options opt, void data);
a3c158d4 BY	42
c6744349 TH	43	#define DIFF_FORMAT_RAW 0x0001
c6744349 TH	44	#define DIFF_FORMAT_DIFFSTAT 0x0002
74e2abe5 JH	45	#define DIFF_FORMAT_NUMSTAT 0x0004
	46	#define DIFF_FORMAT_SUMMARY 0x0008
	47	#define DIFF_FORMAT_PATCH 0x0010
ebd124c6	48	#define DIFF_FORMAT_SHORTSTAT 0x0020
7df7c019	49	#define DIFF_FORMAT_DIRSTAT 0x0040
c6744349 TH	50
c6744349 TH	51	/* These override all above */
74e2abe5 JH	52	#define DIFF_FORMAT_NAME 0x0100
	53	#define DIFF_FORMAT_NAME_STATUS 0x0200
	54	#define DIFF_FORMAT_CHECKDIFF 0x0400
c6744349 TH	55
	56	/* 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	*/
74e2abe5	59	#define DIFF_FORMAT_NO_OUTPUT 0x0800
c6744349	60
74e2abe5	61	#define DIFF_FORMAT_CALLBACK 0x1000
04245581	62
8f67f8ae PH	63	#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)
90d43b07	71	#define DIFF_OPT_RENAME_EMPTY (1 << 8)
882749a0	72	/* (1 << 9) unused */
8f67f8ae	73	#define DIFF_OPT_HAS_CHANGES (1 << 10)
90b19941	74	#define DIFF_OPT_QUICK (1 << 11)
8f67f8ae PH	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)
62c64895	79	#define DIFF_OPT_CHECK_FAILED (1 << 16)
cd676a51	80	#define DIFF_OPT_RELATIVE_NAME (1 << 17)
50fd9bd8	81	#define DIFF_OPT_IGNORE_SUBMODULES (1 << 18)
f88d225f	82	#define DIFF_OPT_DIRSTAT_CUMULATIVE (1 << 19)
fd33777b	83	#define DIFF_OPT_DIRSTAT_BY_FILE (1 << 20)
c7534ef4	84	#define DIFF_OPT_ALLOW_TEXTCONV (1 << 21)
f245194f	85	#define DIFF_OPT_DIFF_FROM_CONTENTS (1 << 22)
752c0c24	86	#define DIFF_OPT_SUBMODULE_LOG (1 << 23)
9297f77e	87	#define DIFF_OPT_DIRTY_SUBMODULES (1 << 24)
3bfc4504	88	#define DIFF_OPT_IGNORE_UNTRACKED_IN_SUBMODULES (1 << 25)
4af574db	89	#define DIFF_OPT_IGNORE_DIRTY_SUBMODULES (1 << 26)
aee9c7d6	90	#define DIFF_OPT_OVERRIDE_SUBMODULE_CONFIG (1 << 27)
1c57a627	91	#define DIFF_OPT_DIRSTAT_BY_LINE (1 << 28)
14937c2c	92	#define DIFF_OPT_FUNCCONTEXT (1 << 29)
accccde4	93	#define DIFF_OPT_PICKAXE_IGNORE_CASE (1 << 30)
9a93c668	94	#define DIFF_OPT_DEFAULT_FOLLOW_RENAMES (1U << 31)
752c0c24	95
8f67f8ae	96	#define DIFF_OPT_TST(opts, flag) ((opts)->flags & DIFF_OPT_##flag)
6c374008 JH	97	#define DIFF_OPT_TOUCHED(opts, flag) ((opts)->touched_flags & DIFF_OPT_##flag)
	98	#define DIFF_OPT_SET(opts, flag) (((opts)->flags \|= DIFF_OPT_##flag),((opts)->touched_flags \|= DIFF_OPT_##flag))
	99	#define DIFF_OPT_CLR(opts, flag) (((opts)->flags &= ~DIFF_OPT_##flag),((opts)->touched_flags \|= DIFF_OPT_##flag))
628d5c2b KC	100	#define DIFF_XDL_TST(opts, flag) ((opts)->xdl_opts & XDF_##flag)
	101	#define DIFF_XDL_SET(opts, flag) ((opts)->xdl_opts \|= XDF_##flag)
	102	#define DIFF_XDL_CLR(opts, flag) ((opts)->xdl_opts &= ~XDF_##flag)
8f67f8ae	103
307ab20b JH	104	#define DIFF_WITH_ALG(opts, flag) (((opts)->xdl_opts & ~XDF_DIFF_ALGORITHM_MASK) \| XDF_##flag)
307ab20b JH	105
882749a0 TR	106	enum diff_words_type {
	107	DIFF_WORDS_NONE = 0,
	108	DIFF_WORDS_PORCELAIN,
	109	DIFF_WORDS_PLAIN,
	110	DIFF_WORDS_COLOR
	111	};
	112
6b5ee137	113	struct diff_options {
6b5ee137 JH	114	const char *orderfile;
6b5ee137 JH	115	const char *pickaxe;
2f3f8b21	116	const char *single_follow;
eab9a40b	117	const char a_prefix, b_prefix;
660e113c JK	118	const char *line_prefix;
660e113c JK	119	size_t line_prefix_length;
8f67f8ae	120	unsigned flags;
6c374008	121	unsigned touched_flags;
1ecc1cbd JH	122
	123	/* diff-filter bits */
	124	unsigned int filter;
	125
f1c96261	126	int use_color;
ee1e5412	127	int context;
6d0e674a	128	int interhunkcontext;
6b5ee137 JH	129	int break_opt;
6b5ee137 JH	130	int detect_rename;
467ddc14	131	int irreversible_delete;
fb13227e	132	int skip_stat_unmatch;
6b5ee137 JH	133	int line_termination;
	134	int output_format;
	135	int pickaxe_opts;
	136	int rename_score;
8082d8d3	137	int rename_limit;
bf0ab10f	138	int needed_rename_limit;
f31027c9	139	int degraded_cc_to_c;
3ac942d4	140	int show_rename_progress;
712d2c7d	141	int dirstat_permille;
6b5ee137	142	int setup;
47dd0d59	143	int abbrev;
b8767f79 JH	144	/* white-space error highlighting */
	145	#define WSEH_NEW 1
	146	#define WSEH_CONTEXT 2
	147	#define WSEH_OLD 4
	148	unsigned ws_error_highlight;
cd676a51 JH	149	const char *prefix;
cd676a51 JH	150	int prefix_length;
698ce6f8	151	const char *stat_sep;
0d21efa5	152	long xdl_opts;
ac1b3d12	153
a2540023 JH	154	int stat_width;
a2540023 JH	155	int stat_name_width;
969fe57b	156	int stat_graph_width;
808e1db2	157	int stat_count;
2b6a5417	158	const char *word_regex;
882749a0	159	enum diff_words_type word_diff;
a2540023	160
34a5e1a2 JS	161	/* this is set by diffcore for DIFF_FORMAT_PATCH */
	162	int found_changes;
	163
44c48a90 JH	164	/* to support internal diff recursion by --follow hack*/
	165	int found_follow;
	166
6c374008 JH	167	void (set_default)(struct diff_options );
6c374008 JH	168
c0c77734 DB	169	FILE *file;
	170	int close_file;
	171
66f13625	172	struct pathspec pathspec;
72441af7	173	pathchange_fn_t pathchange;
ac1b3d12 LT	174	change_fn_t change;
ac1b3d12 LT	175	add_remove_fn_t add_remove;
04245581 JK	176	diff_format_fn_t format_callback;
04245581 JK	177	void *format_callback_data;
a3c158d4 BY	178	diff_prefix_fn_t output_prefix;
a3c158d4 BY	179	void *output_prefix_data;
ee7fb0b1 ZK	180
ee7fb0b1 ZK	181	int diff_path_counter;
6b5ee137 JH	182	};
6b5ee137 JH	183
ce436973 JK	184	enum color_diff {
ce436973 JK	185	DIFF_RESET = 0,
8dbf3eb6	186	DIFF_CONTEXT = 1,
ce436973 JK	187	DIFF_METAINFO = 2,
	188	DIFF_FRAGINFO = 3,
	189	DIFF_FILE_OLD = 4,
	190	DIFF_FILE_NEW = 5,
	191	DIFF_COMMIT = 6,
448c3ef1	192	DIFF_WHITESPACE = 7,
4b05548f	193	DIFF_FUNCINFO = 8
ce436973 JK	194	};
ce436973 JK	195	const char *diff_get_color(int diff_use_color, enum color_diff ix);
8f67f8ae	196	#define diff_get_color_opt(o, ix) \
f1c96261	197	diff_get_color((o)->use_color, ix)
8f67f8ae	198
ce436973	199
f1922234 JK	200	const char diff_line_prefix(struct diff_options );
	201
	202
698ce6f8 JS	203	extern const char mime_boundary_leader[];
698ce6f8 JS	204
72441af7 KS	205	extern struct combine_diff_path *diff_tree_paths(
	206	struct combine_diff_path p, const unsigned char sha1,
	207	const unsigned char **parent_sha1, int nparent,
	208	struct strbuf base, struct diff_options opt);
ac1b3d12 LT	209	extern int diff_tree_sha1(const unsigned char old, const unsigned char new,
ac1b3d12 LT	210	const char base, struct diff_options opt);
2b60356d RS	211	extern int diff_root_tree_sha1(const unsigned char new, const char base,
2b60356d RS	212	struct diff_options *opt);
ac1b3d12	213
ea726d02 JH	214	struct combine_diff_path {
ea726d02 JH	215	struct combine_diff_path *next;
ea726d02	216	char *path;
2454c962	217	unsigned int mode;
1ff57c13	218	struct object_id oid;
2454c962	219	struct combine_diff_parent {
d416df88	220	char status;
2454c962	221	unsigned int mode;
1ff57c13	222	struct object_id oid;
2454c962	223	} parent[FLEX_ARRAY];
ea726d02	224	};
2454c962	225	#define combine_diff_path_size(n, l) \
5b442c4f JK	226	st_add4(sizeof(struct combine_diff_path), (l), 1, \
5b442c4f JK	227	st_mult(sizeof(struct combine_diff_parent), (n)))
ea726d02	228
91539833 LT	229	extern void show_combined_diff(struct combine_diff_path *elem, int num_parent,
91539833 LT	230	int dense, struct rev_info *);
ea726d02	231
0041f09d	232	extern void diff_tree_combined(const unsigned char sha1, const struct sha1_array parents, int dense, struct rev_info *rev);
0fe7c1de	233
82889295	234	extern void diff_tree_combined_merge(const struct commit commit, int dense, struct rev_info rev);
af3feefa	235
a5a818ee JH	236	void diff_set_mnemonic_prefix(struct diff_options options, const char a, const char *b);
a5a818ee JH	237
28b9264d JH	238	extern int diff_can_quit_early(struct diff_options *);
28b9264d JH	239
6b5ee137 JH	240	extern void diff_addremove(struct diff_options *,
6b5ee137 JH	241	int addremove,
77eb2720 JH	242	unsigned mode,
77eb2720 JH	243	const unsigned char *sha1,
e5450100	244	int sha1_valid,
e3d42c47	245	const char *fullpath, unsigned dirty_submodule);
77eb2720	246
6b5ee137 JH	247	extern void diff_change(struct diff_options *,
	248	unsigned mode1, unsigned mode2,
	249	const unsigned char *sha1,
	250	const unsigned char *sha2,
e5450100 JK	251	int sha1_valid,
e5450100 JK	252	int sha2_valid,
e3d42c47 JL	253	const char *fullpath,
e3d42c47 JL	254	unsigned dirty_submodule1, unsigned dirty_submodule2);
77eb2720	255
fa7b2908	256	extern struct diff_filepair diff_unmerge(struct diff_options , const char *path);
77eb2720	257
19feebc8	258	#define DIFF_SETUP_REVERSE 1
f0c6b2a2 JH	259	#define DIFF_SETUP_USE_CACHE 2
f0c6b2a2 JH	260	#define DIFF_SETUP_USE_SIZE_CACHE 4
ce240675	261
dea007fb	262	/*
b0d12fc9	263	* Poor man's alternative to parse-option, to allow both stuck form
dea007fb MM	264	* (--option=value) and separate form (--option value).
	265	*/
	266	extern int parse_long_opt(const char opt, const char *argv,
	267	const char **optarg);
	268
ef90d6d4	269	extern int git_diff_basic_config(const char var, const char value, void *cb);
5404c116	270	extern void init_diff_ui_defaults(void);
ef90d6d4	271	extern int git_diff_ui_config(const char var, const char value, void *cb);
6b5ee137	272	extern void diff_setup(struct diff_options *);
a97262c6	273	extern int diff_opt_parse(struct diff_options , const char , int, const char );
28452655	274	extern void diff_setup_done(struct diff_options *);
86436c28	275
6b14d7fa JH	276	#define DIFF_DETECT_RENAME 1
	277	#define DIFF_DETECT_COPY 2
	278
367cec1c	279	#define DIFF_PICKAXE_ALL 1
d01d8c67	280	#define DIFF_PICKAXE_REGEX 2
f345b0a0	281
f506b8e8 JH	282	#define DIFF_PICKAXE_KIND_S 4 /* traditional plumbing counter */
	283	#define DIFF_PICKAXE_KIND_G 8 /* grep in the patch */
	284
6b5ee137	285	extern void diffcore_std(struct diff_options *);
730f7284	286	extern void diffcore_fix_diff_index(struct diff_options *);
f2ce9fde	287
dda2d79a JH	288	#define COMMON_DIFF_OPTIONS_HELP \
dda2d79a JH	289	"\ncommon diff options:\n" \
8082d8d3 JH	290	" -z output diff-raw with lines terminated with NUL.\n" \
	291	" -p output patch format.\n" \
	292	" -u synonym for -p.\n" \
5c91da25 PB	293	" --patch-with-raw\n" \
5c91da25 PB	294	" output both a patch and the diff-raw format.\n" \
d75f7952	295	" --stat show diffstat instead of patch.\n" \
74e2abe5	296	" --numstat show numeric diffstat instead of patch.\n" \
29353273 JS	297	" --patch-with-stat\n" \
29353273 JS	298	" output a patch and prepend its diffstat.\n" \
8082d8d3	299	" --name-only show only names of changed files.\n" \
946f5f7c	300	" --name-status show names and status of changed files.\n" \
47dd0d59	301	" --full-index show full object name on index lines.\n" \
913419fc	302	" --abbrev=<n> abbreviate object names in diff-tree header and diff-raw.\n" \
8082d8d3 JH	303	" -R swap input file pairs.\n" \
	304	" -B detect complete rewrites.\n" \
	305	" -M detect renames.\n" \
	306	" -C detect copies.\n" \
dda2d79a	307	" --find-copies-harder\n" \
8082d8d3 JH	308	" try unchanged files as candidate for copy detection.\n" \
	309	" -l<n> limit rename attempts up to <n> paths.\n" \
	310	" -O<file> reorder diffs according to the <file>.\n" \
	311	" -S<string> find filepair whose only one side contains the string.\n" \
dda2d79a	312	" --pickaxe-all\n" \
ca49920f SF	313	" show all files diff when -S is used and hit is found.\n" \
ca49920f SF	314	" -a --text treat all files as text.\n"
dda2d79a	315
38c6f780	316	extern int diff_queue_is_empty(void);
6b5ee137	317	extern void diff_flush(struct diff_options*);
f31027c9	318	extern void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc);
86436c28	319
e7baa4f4	320	/* diff-raw status letters */
ca8c9156	321	#define DIFF_STATUS_ADDED 'A'
e7baa4f4 JH	322	#define DIFF_STATUS_COPIED 'C'
	323	#define DIFF_STATUS_DELETED 'D'
	324	#define DIFF_STATUS_MODIFIED 'M'
	325	#define DIFF_STATUS_RENAMED 'R'
	326	#define DIFF_STATUS_TYPE_CHANGED 'T'
	327	#define DIFF_STATUS_UNKNOWN 'X'
	328	#define DIFF_STATUS_UNMERGED 'U'
	329
	330	/* these are not diff-raw status letters proper, but used by
	331	* diffcore-filter insn to specify additional restrictions.
	332	*/
0b34379a	333	#define DIFF_STATUS_FILTER_AON '*'
e7baa4f4 JH	334	#define DIFF_STATUS_FILTER_BROKEN 'B'
e7baa4f4 JH	335
47dd0d59 JH	336	extern const char diff_unique_abbrev(const unsigned char , int);
47dd0d59 JH	337
4bd5b7da JH	338	/* do not report anything on removed paths */
4bd5b7da JH	339	#define DIFF_SILENT_ON_REMOVED 01
fb63d7f8 JH	340	/* report racily-clean paths as modified */
fb63d7f8 JH	341	#define DIFF_RACY_IS_MODIFIED 02
4bd5b7da	342	extern int run_diff_files(struct rev_info *revs, unsigned int option);
5c21ac0e	343	extern int run_diff_index(struct rev_info *revs, int cached);
e09ad6e1	344
1cfe7733	345	extern int do_diff_cache(const unsigned char , struct diff_options );
fcb3d0ad JS	346	extern int diff_flush_patch_id(struct diff_options , unsigned char );
fcb3d0ad JS	347
da31b358 JH	348	extern int diff_result_code(struct diff_options *, int);
da31b358 JH	349
e5f7a5d1	350	extern void diff_no_index(struct rev_info , int, const char *);
0569e9b8	351
75f3ff2e SB	352	extern int index_differs_from(const char *def, int diff_flags);
75f3ff2e SB	353
a64e6a44 JK	354	/*
	355	* Fill the contents of the filespec "df", respecting any textconv defined by
	356	* its userdiff driver. The "driver" parameter must come from a
	357	* previous call to get_textconv(), and therefore should either be NULL or have
	358	* textconv enabled.
	359	*
	360	* Note that the memory ownership of the resulting buffer depends on whether
	361	* the driver field is NULL. If it is, then the memory belongs to the filespec
	362	* struct. If it is non-NULL, then "outbuf" points to a newly allocated buffer
	363	* that should be freed by the caller.
	364	*/
a788d7d5 AB	365	extern size_t fill_textconv(struct userdiff_driver *driver,
	366	struct diff_filespec *df,
	367	char **outbuf);
	368
a64e6a44 JK	369	/*
	370	* Look up the userdiff driver for the given filespec, and return it if
	371	* and only if it has textconv enabled (otherwise return NULL). The result
	372	* can be passed to fill_textconv().
	373	*/
a788d7d5 AB	374	extern struct userdiff_driver get_textconv(struct diff_filespec one);
a788d7d5 AB	375
10ae7526 KB	376	extern int parse_rename_score(const char **cp_p);
10ae7526 KB	377
07924d4d MP	378	extern long parse_algorithm_value(const char *value);
07924d4d MP	379
7f814632 NTND	380	extern int print_stat_summary(FILE *fp, int files,
7f814632 NTND	381	int insertions, int deletions);
4914c962	382	extern void setup_diff_pager(struct diff_options *);
7f814632	383
86436c28	384	#endif /* DIFF_H */