[git/git.git] / diffcore.h

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

/* This header file is internal between diff.c and its diff transformers
 * (e.g. diffcore-rename, diffcore-pickaxe).  Never include this header
 * in anything else.
 */
#define MAX_SCORE 10000
#define DEFAULT_MINIMUM_SCORE 5000

#define RENAME_DST_MATCHED 01

struct diff_filespec {
	unsigned char sha1[20];
	char *path;
	void *data;
	unsigned long size;
	int xfrm_flags;		 /* for use by the xfrm */
	unsigned short mode;	 /* file mode */
	unsigned sha1_valid : 1; /* if true, use sha1 and trust mode;
				  * if false, use the name and read from
				  * the filesystem.
				  */
#define DIFF_FILE_VALID(spec) (((spec)->mode) != 0)
	unsigned should_free : 1; /* data should be free()'ed */
	unsigned should_munmap : 1; /* data should be munmap()'ed */
};

extern struct diff_filespec *alloc_filespec(const char *);
extern void fill_filespec(struct diff_filespec *, const unsigned char *,
			  unsigned short);

extern int diff_populate_filespec(struct diff_filespec *);
extern void diff_free_filespec_data(struct diff_filespec *);

struct diff_filepair {
	struct diff_filespec *one;
	struct diff_filespec *two;
	int score; /* only valid when one and two are different paths */
	int orig_order; /* the original order of insertion into the queue */
	int rename_rank; /* rename/copy dependency needs to enforce
			  * certain ordering of patches that later
			  * diffcore transformations should not break.
			  */
	int status; /* M C R N D U (see Documentation/diff-format.txt) */
};
#define DIFF_PAIR_UNMERGED(p) \
	(!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two))

extern int diff_unmodified_pair(struct diff_filepair *);

struct diff_queue_struct {
	struct diff_filepair **queue;
	int alloc;
	int nr;
};

extern struct diff_queue_struct diff_queued_diff;
extern struct diff_filepair *diff_queue(struct diff_queue_struct *,
					struct diff_filespec *,
					struct diff_filespec *);
extern void diff_q(struct diff_queue_struct *, struct diff_filepair *);

extern int diff_needs_to_stay(struct diff_queue_struct *, int,
			      struct diff_filespec *);

#endif
Commit	Line	Data
427dcb4b JH	1	/*
	2	* Copyright (C) 2005 Junio C Hamano
	3	*/
	4	#ifndef _DIFFCORE_H_
	5	#define _DIFFCORE_H_
	6
	7	/* This header file is internal between diff.c and its diff transformers
	8	* (e.g. diffcore-rename, diffcore-pickaxe). Never include this header
	9	* in anything else.
	10	*/
	11	#define MAX_SCORE 10000
	12	#define DEFAULT_MINIMUM_SCORE 5000
	13
	14	#define RENAME_DST_MATCHED 01
427dcb4b JH	15
	16	struct diff_filespec {
	17	unsigned char sha1[20];
	18	char *path;
	19	void *data;
	20	unsigned long size;
	21	int xfrm_flags; /* for use by the xfrm */
	22	unsigned short mode; /* file mode */
	23	unsigned sha1_valid : 1; /* if true, use sha1 and trust mode;
	24	* if false, use the name and read from
	25	* the filesystem.
	26	*/
81e50eab	27	#define DIFF_FILE_VALID(spec) (((spec)->mode) != 0)
427dcb4b JH	28	unsigned should_free : 1; /* data should be free()'ed */
	29	unsigned should_munmap : 1; /* data should be munmap()'ed */
	30	};
	31
	32	extern struct diff_filespec alloc_filespec(const char );
	33	extern void fill_filespec(struct diff_filespec , const unsigned char ,
	34	unsigned short);
	35
	36	extern int diff_populate_filespec(struct diff_filespec *);
	37	extern void diff_free_filespec_data(struct diff_filespec *);
	38
52e95789	39	struct diff_filepair {
427dcb4b JH	40	struct diff_filespec *one;
427dcb4b JH	41	struct diff_filespec *two;
f7c1512a	42	int score; /* only valid when one and two are different paths */
427dcb4b	43	int orig_order; /* the original order of insertion into the queue */
f7c1512a JH	44	int rename_rank; /* rename/copy dependency needs to enforce
	45	* certain ordering of patches that later
	46	* diffcore transformations should not break.
	47	*/
b6d8f309	48	int status; /* M C R N D U (see Documentation/diff-format.txt) */
427dcb4b	49	};
6b14d7fa JH	50	#define DIFF_PAIR_UNMERGED(p) \
6b14d7fa JH	51	(!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two))
427dcb4b	52
f7c1512a JH	53	extern int diff_unmodified_pair(struct diff_filepair *);
f7c1512a JH	54
427dcb4b	55	struct diff_queue_struct {
52e95789	56	struct diff_filepair **queue;
427dcb4b JH	57	int alloc;
	58	int nr;
	59	};
	60
38c6f780	61	extern struct diff_queue_struct diff_queued_diff;
52e95789 JH	62	extern struct diff_filepair diff_queue(struct diff_queue_struct ,
	63	struct diff_filespec *,
	64	struct diff_filespec *);
6b14d7fa	65	extern void diff_q(struct diff_queue_struct , struct diff_filepair );
f7c1512a JH	66
	67	extern int diff_needs_to_stay(struct diff_queue_struct *, int,
	68	struct diff_filespec *);
427dcb4b JH	69
427dcb4b JH	70	#endif