[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"
#include "oidset.h"

struct combine_diff_path;
struct commit;
struct diff_filespec;
struct diff_options;
struct diff_queue_struct;
struct oid_array;
struct option;
struct repository;
struct rev_info;
struct strbuf;
struct userdiff_driver;

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 struct object_id *old_oid,
		 const struct object_id *new_oid,
		 int old_oid_valid, int new_oid_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 struct object_id *oid,
		    int oid_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_FLAGS_INIT { 0 }
struct diff_flags {
	unsigned recursive;
	unsigned tree_in_recursive;
	unsigned binary;
	unsigned text;
	unsigned full_index;
	unsigned silent_on_remove;
	unsigned find_copies_harder;
	unsigned follow_renames;
	unsigned rename_empty;
	unsigned has_changes;
	unsigned quick;
	unsigned no_index;
	unsigned allow_external;
	unsigned exit_with_status;
	unsigned reverse_diff;
	unsigned check_failed;
	unsigned relative_name;
	unsigned ignore_submodules;
	unsigned dirstat_cumulative;
	unsigned dirstat_by_file;
	unsigned allow_textconv;
	unsigned textconv_set_via_cmdline;
	unsigned diff_from_contents;
	unsigned dirty_submodules;
	unsigned ignore_untracked_in_submodules;
	unsigned ignore_dirty_submodules;
	unsigned override_submodule_config;
	unsigned dirstat_by_line;
	unsigned funccontext;
	unsigned default_follow_renames;
	unsigned stat_with_summary;
	unsigned suppress_diff_headers;
	unsigned dual_color_diffed_diffs;
	unsigned suppress_hunk_header_line_count;
};

static inline void diff_flags_or(struct diff_flags *a,
				 const struct diff_flags *b)
{
	char *tmp_a = (char *)a;
	const char *tmp_b = (const char *)b;
	int i;

	for (i = 0; i < sizeof(struct diff_flags); i++)
		tmp_a[i] |= tmp_b[i];
}

#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
};

enum diff_submodule_format {
	DIFF_SUBMODULE_SHORT = 0,
	DIFF_SUBMODULE_LOG,
	DIFF_SUBMODULE_INLINE_DIFF
};

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;
	struct diff_flags 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;
	unsigned 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;
	int ita_invisible_in_index;
/* white-space error highlighting */
#define WSEH_NEW (1<<12)
#define WSEH_CONTEXT (1<<13)
#define WSEH_OLD (1<<14)
	unsigned ws_error_highlight;
	const char *prefix;
	int prefix_length;
	const char *stat_sep;
	int xdl_opts;

	/* see Documentation/diff-options.txt */
	char **anchors;
	size_t anchors_nr, anchors_alloc;

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

	struct oidset *objfind;

	/* 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;

#define OUTPUT_INDICATOR_NEW 0
#define OUTPUT_INDICATOR_OLD 1
#define OUTPUT_INDICATOR_CONTEXT 2
	char output_indicators[3];

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

	int diff_path_counter;

	struct emitted_diff_symbols *emitted_symbols;
	enum {
		COLOR_MOVED_NO = 0,
		COLOR_MOVED_PLAIN = 1,
		COLOR_MOVED_BLOCKS = 2,
		COLOR_MOVED_ZEBRA = 3,
		COLOR_MOVED_ZEBRA_DIM = 4,
	} color_moved;
	#define COLOR_MOVED_DEFAULT COLOR_MOVED_ZEBRA
	#define COLOR_MOVED_MIN_ALNUM_COUNT 20

	/* XDF_WHITESPACE_FLAGS regarding block detection are set at 2, 3, 4 */
	#define COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE (1<<5)
	#define COLOR_MOVED_WS_ERROR (1<<0)
	unsigned color_moved_ws_handling;

	struct repository *repo;
	struct option *parseopts;
};

unsigned diff_filter_bit(char status);

void diff_emit_submodule_del(struct diff_options *o, const char *line);
void diff_emit_submodule_add(struct diff_options *o, const char *line);
void diff_emit_submodule_untracked(struct diff_options *o, const char *path);
void diff_emit_submodule_modified(struct diff_options *o, const char *path);
void diff_emit_submodule_header(struct diff_options *o, const char *header);
void diff_emit_submodule_error(struct diff_options *o, const char *err);
void diff_emit_submodule_pipethrough(struct diff_options *o,
				     const char *line, int len);

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,
	DIFF_FILE_OLD_MOVED = 9,
	DIFF_FILE_OLD_MOVED_ALT = 10,
	DIFF_FILE_OLD_MOVED_DIM = 11,
	DIFF_FILE_OLD_MOVED_ALT_DIM = 12,
	DIFF_FILE_NEW_MOVED = 13,
	DIFF_FILE_NEW_MOVED_ALT = 14,
	DIFF_FILE_NEW_MOVED_DIM = 15,
	DIFF_FILE_NEW_MOVED_ALT_DIM = 16,
	DIFF_CONTEXT_DIM = 17,
	DIFF_FILE_OLD_DIM = 18,
	DIFF_FILE_NEW_DIM = 19,
	DIFF_CONTEXT_BOLD = 20,
	DIFF_FILE_OLD_BOLD = 21,
	DIFF_FILE_NEW_BOLD = 22,
};
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[];

struct combine_diff_path *diff_tree_paths(
	struct combine_diff_path *p, const struct object_id *oid,
	const struct object_id **parents_oid, int nparent,
	struct strbuf *base, struct diff_options *opt);
int diff_tree_oid(const struct object_id *old_oid,
		  const struct object_id *new_oid,
		  const char *base, struct diff_options *opt);
int diff_root_tree_oid(const struct object_id *new_oid, 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;
		struct strbuf path;
	} 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)))

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

void diff_tree_combined(const struct object_id *oid, const struct oid_array *parents, int dense, struct rev_info *rev);

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);

int diff_can_quit_early(struct diff_options *);

void diff_addremove(struct diff_options *,
		    int addremove,
		    unsigned mode,
		    const struct object_id *oid,
		    int oid_valid,
		    const char *fullpath, unsigned dirty_submodule);

void diff_change(struct diff_options *,
		 unsigned mode1, unsigned mode2,
		 const struct object_id *old_oid,
		 const struct object_id *new_oid,
		 int old_oid_valid, int new_oid_valid,
		 const char *fullpath,
		 unsigned dirty_submodule1, unsigned dirty_submodule2);

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

#define DIFF_SETUP_REVERSE      	1
#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).
 */
int parse_long_opt(const char *opt, const char **argv,
		   const char **optarg);

int git_diff_basic_config(const char *var, const char *value, void *cb);
int git_diff_heuristic_config(const char *var, const char *value, void *cb);
void init_diff_ui_defaults(void);
int git_diff_ui_config(const char *var, const char *value, void *cb);
#ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
#define diff_setup(diffopts) repo_diff_setup(the_repository, diffopts)
#endif
void repo_diff_setup(struct repository *, struct diff_options *);
int diff_opt_parse(struct diff_options *, const char **, int, const char *);
void diff_setup_done(struct diff_options *);
int git_config_rename(const char *var, const char *value);

#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 */
#define DIFF_PICKAXE_KIND_OBJFIND	16 /* specific object IDs */

#define DIFF_PICKAXE_KINDS_MASK (DIFF_PICKAXE_KIND_S | \
				 DIFF_PICKAXE_KIND_G | \
				 DIFF_PICKAXE_KIND_OBJFIND)

#define DIFF_PICKAXE_IGNORE_CASE	32

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

#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"

int diff_queue_is_empty(void);
void diff_flush(struct diff_options*);
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'

/*
 * This is different from find_unique_abbrev() in that
 * it stuffs the result with dots for alignment.
 */
const char *diff_aligned_abbrev(const struct object_id *sha1, 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
int run_diff_files(struct rev_info *revs, unsigned int option);
int run_diff_index(struct rev_info *revs, int cached);

int do_diff_cache(const struct object_id *, struct diff_options *);
int diff_flush_patch_id(struct diff_options *, struct object_id *, int, int);
void flush_one_hunk(struct object_id *result, git_hash_ctx *ctx);

int diff_result_code(struct diff_options *, int);

int diff_no_index(struct rev_info *,
		  int implicit_no_index, int, const char **);

int index_differs_from(struct repository *r, const char *def,
		       const struct diff_flags *flags,
		       int ita_invisible_in_index);

/*
 * 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.
 */
size_t fill_textconv(struct repository *r,
		     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().
 */
struct userdiff_driver *get_textconv(struct repository *r,
				     struct diff_filespec *one);

/*
 * Prepare diff_filespec and convert it using diff textconv API
 * if the textconv driver exists.
 * Return 1 if the conversion succeeds, 0 otherwise.
 */
int textconv_object(struct repository *repo,
		    const char *path,
		    unsigned mode,
		    const struct object_id *oid, int oid_valid,
		    char **buf, unsigned long *buf_size);

int parse_rename_score(const char **cp_p);

long parse_algorithm_value(const char *value);

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

#endif /* DIFF_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2005 Junio C Hamano
	3	*/
	4	#ifndef DIFF_H
	5	#define DIFF_H
	6
	7	#include "tree-walk.h"
	8	#include "pathspec.h"
	9	#include "object.h"
	10	#include "oidset.h"
	11
	12	struct combine_diff_path;
	13	struct commit;
	14	struct diff_filespec;
	15	struct diff_options;
	16	struct diff_queue_struct;
	17	struct oid_array;
	18	struct option;
	19	struct repository;
	20	struct rev_info;
	21	struct strbuf;
	22	struct userdiff_driver;
	23
	24	typedef int (pathchange_fn_t)(struct diff_options options,
	25	struct combine_diff_path *path);
	26
	27	typedef void (change_fn_t)(struct diff_options options,
	28	unsigned old_mode, unsigned new_mode,
	29	const struct object_id *old_oid,
	30	const struct object_id *new_oid,
	31	int old_oid_valid, int new_oid_valid,
	32	const char *fullpath,
	33	unsigned old_dirty_submodule, unsigned new_dirty_submodule);
	34
	35	typedef void (add_remove_fn_t)(struct diff_options options,
	36	int addremove, unsigned mode,
	37	const struct object_id *oid,
	38	int oid_valid,
	39	const char *fullpath, unsigned dirty_submodule);
	40
	41	typedef void (diff_format_fn_t)(struct diff_queue_struct q,
	42	struct diff_options options, void data);
	43
	44	typedef struct strbuf (diff_prefix_fn_t)(struct diff_options opt, void data);
	45
	46	#define DIFF_FORMAT_RAW 0x0001
	47	#define DIFF_FORMAT_DIFFSTAT 0x0002
	48	#define DIFF_FORMAT_NUMSTAT 0x0004
	49	#define DIFF_FORMAT_SUMMARY 0x0008
	50	#define DIFF_FORMAT_PATCH 0x0010
	51	#define DIFF_FORMAT_SHORTSTAT 0x0020
	52	#define DIFF_FORMAT_DIRSTAT 0x0040
	53
	54	/* These override all above */
	55	#define DIFF_FORMAT_NAME 0x0100
	56	#define DIFF_FORMAT_NAME_STATUS 0x0200
	57	#define DIFF_FORMAT_CHECKDIFF 0x0400
	58
	59	/* Same as output_format = 0 but we know that -s flag was given
	60	* and we should not give default value to output_format.
	61	*/
	62	#define DIFF_FORMAT_NO_OUTPUT 0x0800
	63
	64	#define DIFF_FORMAT_CALLBACK 0x1000
	65
	66	#define DIFF_FLAGS_INIT { 0 }
	67	struct diff_flags {
	68	unsigned recursive;
	69	unsigned tree_in_recursive;
	70	unsigned binary;
	71	unsigned text;
	72	unsigned full_index;
	73	unsigned silent_on_remove;
	74	unsigned find_copies_harder;
	75	unsigned follow_renames;
	76	unsigned rename_empty;
	77	unsigned has_changes;
	78	unsigned quick;
	79	unsigned no_index;
	80	unsigned allow_external;
	81	unsigned exit_with_status;
	82	unsigned reverse_diff;
	83	unsigned check_failed;
	84	unsigned relative_name;
	85	unsigned ignore_submodules;
	86	unsigned dirstat_cumulative;
	87	unsigned dirstat_by_file;
	88	unsigned allow_textconv;
	89	unsigned textconv_set_via_cmdline;
	90	unsigned diff_from_contents;
	91	unsigned dirty_submodules;
	92	unsigned ignore_untracked_in_submodules;
	93	unsigned ignore_dirty_submodules;
	94	unsigned override_submodule_config;
	95	unsigned dirstat_by_line;
	96	unsigned funccontext;
	97	unsigned default_follow_renames;
	98	unsigned stat_with_summary;
	99	unsigned suppress_diff_headers;
	100	unsigned dual_color_diffed_diffs;
	101	unsigned suppress_hunk_header_line_count;
	102	};
	103
	104	static inline void diff_flags_or(struct diff_flags *a,
	105	const struct diff_flags *b)
	106	{
	107	char tmp_a = (char )a;
	108	const char tmp_b = (const char )b;
	109	int i;
	110
	111	for (i = 0; i < sizeof(struct diff_flags); i++)
	112	tmp_a[i] \|= tmp_b[i];
	113	}
	114
	115	#define DIFF_XDL_TST(opts, flag) ((opts)->xdl_opts & XDF_##flag)
	116	#define DIFF_XDL_SET(opts, flag) ((opts)->xdl_opts \|= XDF_##flag)
	117	#define DIFF_XDL_CLR(opts, flag) ((opts)->xdl_opts &= ~XDF_##flag)
	118
	119	#define DIFF_WITH_ALG(opts, flag) (((opts)->xdl_opts & ~XDF_DIFF_ALGORITHM_MASK) \| XDF_##flag)
	120
	121	enum diff_words_type {
	122	DIFF_WORDS_NONE = 0,
	123	DIFF_WORDS_PORCELAIN,
	124	DIFF_WORDS_PLAIN,
	125	DIFF_WORDS_COLOR
	126	};
	127
	128	enum diff_submodule_format {
	129	DIFF_SUBMODULE_SHORT = 0,
	130	DIFF_SUBMODULE_LOG,
	131	DIFF_SUBMODULE_INLINE_DIFF
	132	};
	133
	134	struct diff_options {
	135	const char *orderfile;
	136	const char *pickaxe;
	137	const char *single_follow;
	138	const char a_prefix, b_prefix;
	139	const char *line_prefix;
	140	size_t line_prefix_length;
	141	struct diff_flags flags;
	142
	143	/* diff-filter bits */
	144	unsigned int filter;
	145
	146	int use_color;
	147	int context;
	148	int interhunkcontext;
	149	int break_opt;
	150	int detect_rename;
	151	int irreversible_delete;
	152	int skip_stat_unmatch;
	153	int line_termination;
	154	int output_format;
	155	unsigned pickaxe_opts;
	156	int rename_score;
	157	int rename_limit;
	158	int needed_rename_limit;
	159	int degraded_cc_to_c;
	160	int show_rename_progress;
	161	int dirstat_permille;
	162	int setup;
	163	int abbrev;
	164	int ita_invisible_in_index;
	165	/* white-space error highlighting */
	166	#define WSEH_NEW (1<<12)
	167	#define WSEH_CONTEXT (1<<13)
	168	#define WSEH_OLD (1<<14)
	169	unsigned ws_error_highlight;
	170	const char *prefix;
	171	int prefix_length;
	172	const char *stat_sep;
	173	int xdl_opts;
	174
	175	/* see Documentation/diff-options.txt */
	176	char **anchors;
	177	size_t anchors_nr, anchors_alloc;
	178
	179	int stat_width;
	180	int stat_name_width;
	181	int stat_graph_width;
	182	int stat_count;
	183	const char *word_regex;
	184	enum diff_words_type word_diff;
	185	enum diff_submodule_format submodule_format;
	186
	187	struct oidset *objfind;
	188
	189	/* this is set by diffcore for DIFF_FORMAT_PATCH */
	190	int found_changes;
	191
	192	/* to support internal diff recursion by --follow hack*/
	193	int found_follow;
	194
	195	void (set_default)(struct diff_options );
	196
	197	FILE *file;
	198	int close_file;
	199
	200	#define OUTPUT_INDICATOR_NEW 0
	201	#define OUTPUT_INDICATOR_OLD 1
	202	#define OUTPUT_INDICATOR_CONTEXT 2
	203	char output_indicators[3];
	204
	205	struct pathspec pathspec;
	206	pathchange_fn_t pathchange;
	207	change_fn_t change;
	208	add_remove_fn_t add_remove;
	209	void *change_fn_data;
	210	diff_format_fn_t format_callback;
	211	void *format_callback_data;
	212	diff_prefix_fn_t output_prefix;
	213	void *output_prefix_data;
	214
	215	int diff_path_counter;
	216
	217	struct emitted_diff_symbols *emitted_symbols;
	218	enum {
	219	COLOR_MOVED_NO = 0,
	220	COLOR_MOVED_PLAIN = 1,
	221	COLOR_MOVED_BLOCKS = 2,
	222	COLOR_MOVED_ZEBRA = 3,
	223	COLOR_MOVED_ZEBRA_DIM = 4,
	224	} color_moved;
	225	#define COLOR_MOVED_DEFAULT COLOR_MOVED_ZEBRA
	226	#define COLOR_MOVED_MIN_ALNUM_COUNT 20
	227
	228	/* XDF_WHITESPACE_FLAGS regarding block detection are set at 2, 3, 4 */
	229	#define COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE (1<<5)
	230	#define COLOR_MOVED_WS_ERROR (1<<0)
	231	unsigned color_moved_ws_handling;
	232
	233	struct repository *repo;
	234	struct option *parseopts;
	235	};
	236
	237	unsigned diff_filter_bit(char status);
	238
	239	void diff_emit_submodule_del(struct diff_options o, const char line);
	240	void diff_emit_submodule_add(struct diff_options o, const char line);
	241	void diff_emit_submodule_untracked(struct diff_options o, const char path);
	242	void diff_emit_submodule_modified(struct diff_options o, const char path);
	243	void diff_emit_submodule_header(struct diff_options o, const char header);
	244	void diff_emit_submodule_error(struct diff_options o, const char err);
	245	void diff_emit_submodule_pipethrough(struct diff_options *o,
	246	const char *line, int len);
	247
	248	enum color_diff {
	249	DIFF_RESET = 0,
	250	DIFF_CONTEXT = 1,
	251	DIFF_METAINFO = 2,
	252	DIFF_FRAGINFO = 3,
	253	DIFF_FILE_OLD = 4,
	254	DIFF_FILE_NEW = 5,
	255	DIFF_COMMIT = 6,
	256	DIFF_WHITESPACE = 7,
	257	DIFF_FUNCINFO = 8,
	258	DIFF_FILE_OLD_MOVED = 9,
	259	DIFF_FILE_OLD_MOVED_ALT = 10,
	260	DIFF_FILE_OLD_MOVED_DIM = 11,
	261	DIFF_FILE_OLD_MOVED_ALT_DIM = 12,
	262	DIFF_FILE_NEW_MOVED = 13,
	263	DIFF_FILE_NEW_MOVED_ALT = 14,
	264	DIFF_FILE_NEW_MOVED_DIM = 15,
	265	DIFF_FILE_NEW_MOVED_ALT_DIM = 16,
	266	DIFF_CONTEXT_DIM = 17,
	267	DIFF_FILE_OLD_DIM = 18,
	268	DIFF_FILE_NEW_DIM = 19,
	269	DIFF_CONTEXT_BOLD = 20,
	270	DIFF_FILE_OLD_BOLD = 21,
	271	DIFF_FILE_NEW_BOLD = 22,
	272	};
	273	const char *diff_get_color(int diff_use_color, enum color_diff ix);
	274	#define diff_get_color_opt(o, ix) \
	275	diff_get_color((o)->use_color, ix)
	276
	277
	278	const char diff_line_prefix(struct diff_options );
	279
	280
	281	extern const char mime_boundary_leader[];
	282
	283	struct combine_diff_path *diff_tree_paths(
	284	struct combine_diff_path p, const struct object_id oid,
	285	const struct object_id **parents_oid, int nparent,
	286	struct strbuf base, struct diff_options opt);
	287	int diff_tree_oid(const struct object_id *old_oid,
	288	const struct object_id *new_oid,
	289	const char base, struct diff_options opt);
	290	int diff_root_tree_oid(const struct object_id new_oid, const char base,
	291	struct diff_options *opt);
	292
	293	struct combine_diff_path {
	294	struct combine_diff_path *next;
	295	char *path;
	296	unsigned int mode;
	297	struct object_id oid;
	298	struct combine_diff_parent {
	299	char status;
	300	unsigned int mode;
	301	struct object_id oid;
	302	struct strbuf path;
	303	} parent[FLEX_ARRAY];
	304	};
	305	#define combine_diff_path_size(n, l) \
	306	st_add4(sizeof(struct combine_diff_path), (l), 1, \
	307	st_mult(sizeof(struct combine_diff_parent), (n)))
	308
	309	void show_combined_diff(struct combine_diff_path *elem, int num_parent,
	310	int dense, struct rev_info *);
	311
	312	void diff_tree_combined(const struct object_id oid, const struct oid_array parents, int dense, struct rev_info *rev);
	313
	314	void diff_tree_combined_merge(const struct commit commit, int dense, struct rev_info rev);
	315
	316	void diff_set_mnemonic_prefix(struct diff_options options, const char a, const char *b);
	317
	318	int diff_can_quit_early(struct diff_options *);
	319
	320	void diff_addremove(struct diff_options *,
	321	int addremove,
	322	unsigned mode,
	323	const struct object_id *oid,
	324	int oid_valid,
	325	const char *fullpath, unsigned dirty_submodule);
	326
	327	void diff_change(struct diff_options *,
	328	unsigned mode1, unsigned mode2,
	329	const struct object_id *old_oid,
	330	const struct object_id *new_oid,
	331	int old_oid_valid, int new_oid_valid,
	332	const char *fullpath,
	333	unsigned dirty_submodule1, unsigned dirty_submodule2);
	334
	335	struct diff_filepair diff_unmerge(struct diff_options , const char *path);
	336
	337	#define DIFF_SETUP_REVERSE 1
	338	#define DIFF_SETUP_USE_SIZE_CACHE 4
	339
	340	/*
	341	* Poor man's alternative to parse-option, to allow both stuck form
	342	* (--option=value) and separate form (--option value).
	343	*/
	344	int parse_long_opt(const char opt, const char *argv,
	345	const char **optarg);
	346
	347	int git_diff_basic_config(const char var, const char value, void *cb);
	348	int git_diff_heuristic_config(const char var, const char value, void *cb);
	349	void init_diff_ui_defaults(void);
	350	int git_diff_ui_config(const char var, const char value, void *cb);
	351	#ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
	352	#define diff_setup(diffopts) repo_diff_setup(the_repository, diffopts)
	353	#endif
	354	void repo_diff_setup(struct repository , struct diff_options );
	355	int diff_opt_parse(struct diff_options , const char , int, const char );
	356	void diff_setup_done(struct diff_options *);
	357	int git_config_rename(const char var, const char value);
	358
	359	#define DIFF_DETECT_RENAME 1
	360	#define DIFF_DETECT_COPY 2
	361
	362	#define DIFF_PICKAXE_ALL 1
	363	#define DIFF_PICKAXE_REGEX 2
	364
	365	#define DIFF_PICKAXE_KIND_S 4 /* traditional plumbing counter */
	366	#define DIFF_PICKAXE_KIND_G 8 /* grep in the patch */
	367	#define DIFF_PICKAXE_KIND_OBJFIND 16 /* specific object IDs */
	368
	369	#define DIFF_PICKAXE_KINDS_MASK (DIFF_PICKAXE_KIND_S \| \
	370	DIFF_PICKAXE_KIND_G \| \
	371	DIFF_PICKAXE_KIND_OBJFIND)
	372
	373	#define DIFF_PICKAXE_IGNORE_CASE 32
	374
	375	void diffcore_std(struct diff_options *);
	376	void diffcore_fix_diff_index(void);
	377
	378	#define COMMON_DIFF_OPTIONS_HELP \
	379	"\ncommon diff options:\n" \
	380	" -z output diff-raw with lines terminated with NUL.\n" \
	381	" -p output patch format.\n" \
	382	" -u synonym for -p.\n" \
	383	" --patch-with-raw\n" \
	384	" output both a patch and the diff-raw format.\n" \
	385	" --stat show diffstat instead of patch.\n" \
	386	" --numstat show numeric diffstat instead of patch.\n" \
	387	" --patch-with-stat\n" \
	388	" output a patch and prepend its diffstat.\n" \
	389	" --name-only show only names of changed files.\n" \
	390	" --name-status show names and status of changed files.\n" \
	391	" --full-index show full object name on index lines.\n" \
	392	" --abbrev=<n> abbreviate object names in diff-tree header and diff-raw.\n" \
	393	" -R swap input file pairs.\n" \
	394	" -B detect complete rewrites.\n" \
	395	" -M detect renames.\n" \
	396	" -C detect copies.\n" \
	397	" --find-copies-harder\n" \
	398	" try unchanged files as candidate for copy detection.\n" \
	399	" -l<n> limit rename attempts up to <n> paths.\n" \
	400	" -O<file> reorder diffs according to the <file>.\n" \
	401	" -S<string> find filepair whose only one side contains the string.\n" \
	402	" --pickaxe-all\n" \
	403	" show all files diff when -S is used and hit is found.\n" \
	404	" -a --text treat all files as text.\n"
	405
	406	int diff_queue_is_empty(void);
	407	void diff_flush(struct diff_options*);
	408	void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc);
	409
	410	/* diff-raw status letters */
	411	#define DIFF_STATUS_ADDED 'A'
	412	#define DIFF_STATUS_COPIED 'C'
	413	#define DIFF_STATUS_DELETED 'D'
	414	#define DIFF_STATUS_MODIFIED 'M'
	415	#define DIFF_STATUS_RENAMED 'R'
	416	#define DIFF_STATUS_TYPE_CHANGED 'T'
	417	#define DIFF_STATUS_UNKNOWN 'X'
	418	#define DIFF_STATUS_UNMERGED 'U'
	419
	420	/* these are not diff-raw status letters proper, but used by
	421	* diffcore-filter insn to specify additional restrictions.
	422	*/
	423	#define DIFF_STATUS_FILTER_AON '*'
	424	#define DIFF_STATUS_FILTER_BROKEN 'B'
	425
	426	/*
	427	* This is different from find_unique_abbrev() in that
	428	* it stuffs the result with dots for alignment.
	429	*/
	430	const char diff_aligned_abbrev(const struct object_id sha1, int);
	431
	432	/* do not report anything on removed paths */
	433	#define DIFF_SILENT_ON_REMOVED 01
	434	/* report racily-clean paths as modified */
	435	#define DIFF_RACY_IS_MODIFIED 02
	436	int run_diff_files(struct rev_info *revs, unsigned int option);
	437	int run_diff_index(struct rev_info *revs, int cached);
	438
	439	int do_diff_cache(const struct object_id , struct diff_options );
	440	int diff_flush_patch_id(struct diff_options , struct object_id , int, int);
	441	void flush_one_hunk(struct object_id result, git_hash_ctx ctx);
	442
	443	int diff_result_code(struct diff_options *, int);
	444
	445	int diff_no_index(struct rev_info *,
	446	int implicit_no_index, int, const char **);
	447
	448	int index_differs_from(struct repository r, const char def,
	449	const struct diff_flags *flags,
	450	int ita_invisible_in_index);
	451
	452	/*
	453	* Fill the contents of the filespec "df", respecting any textconv defined by
	454	* its userdiff driver. The "driver" parameter must come from a
	455	* previous call to get_textconv(), and therefore should either be NULL or have
	456	* textconv enabled.
	457	*
	458	* Note that the memory ownership of the resulting buffer depends on whether
	459	* the driver field is NULL. If it is, then the memory belongs to the filespec
	460	* struct. If it is non-NULL, then "outbuf" points to a newly allocated buffer
	461	* that should be freed by the caller.
	462	*/
	463	size_t fill_textconv(struct repository *r,
	464	struct userdiff_driver *driver,
	465	struct diff_filespec *df,
	466	char **outbuf);
	467
	468	/*
	469	* Look up the userdiff driver for the given filespec, and return it if
	470	* and only if it has textconv enabled (otherwise return NULL). The result
	471	* can be passed to fill_textconv().
	472	*/
	473	struct userdiff_driver get_textconv(struct repository r,
	474	struct diff_filespec *one);
	475
	476	/*
	477	* Prepare diff_filespec and convert it using diff textconv API
	478	* if the textconv driver exists.
	479	* Return 1 if the conversion succeeds, 0 otherwise.
	480	*/
	481	int textconv_object(struct repository *repo,
	482	const char *path,
	483	unsigned mode,
	484	const struct object_id *oid, int oid_valid,
	485	char *buf, unsigned long buf_size);
	486
	487	int parse_rename_score(const char **cp_p);
	488
	489	long parse_algorithm_value(const char *value);
	490
	491	void print_stat_summary(FILE *fp, int files,
	492	int insertions, int deletions);
	493	void setup_diff_pager(struct diff_options *);
	494
	495	#endif /* DIFF_H */