diff options
Diffstat (limited to 'diffcore.h')
| -rw-r--r-- | diffcore.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/diffcore.h b/diffcore.h new file mode 100644 index 0000000000..1ea80671e3 --- /dev/null +++ b/diffcore.h @@ -0,0 +1,114 @@ +/* + * 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. + */ + +/* We internally use unsigned short as the score value, + * and rely on an int capable to hold 32-bits. -B can take + * -Bmerge_score/break_score format and the two scores are + * passed around in one int (high 16-bit for merge and low 16-bit + * for break). + */ +#define MAX_SCORE 60000.0 +#define DEFAULT_RENAME_SCORE 30000 /* rename/copy similarity minimum (50%) */ +#define DEFAULT_BREAK_SCORE 30000 /* minimum for break to happen (50%) */ +#define DEFAULT_MERGE_SCORE 36000 /* maximum for break-merge to happen 60%) */ + +#define MINIMUM_BREAK_SIZE 400 /* do not break a file smaller than this */ + +struct diff_filespec { + unsigned char sha1[20]; + char *path; + void *data; + void *cnt_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 *, int); +extern void diff_free_filespec_data(struct diff_filespec *); + +struct diff_filepair { + struct diff_filespec *one; + struct diff_filespec *two; + unsigned short int score; + char status; /* M C R N D U (see Documentation/diff-format.txt) */ + unsigned source_stays : 1; /* all of R/C are copies */ + unsigned broken_pair : 1; + unsigned renamed_pair : 1; + unsigned is_unmerged : 1; +}; +#define DIFF_PAIR_UNMERGED(p) ((p)->is_unmerged) + +#define DIFF_PAIR_RENAME(p) ((p)->renamed_pair) + +#define DIFF_PAIR_BROKEN(p) \ + ( (!DIFF_FILE_VALID((p)->one) != !DIFF_FILE_VALID((p)->two)) && \ + ((p)->broken_pair != 0) ) + +#define DIFF_PAIR_TYPE_CHANGED(p) \ + ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode)) + +#define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode) + +extern void diff_free_filepair(struct diff_filepair *); + +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 void diffcore_pathspec(const char **pathspec); +extern void diffcore_break(int); +extern void diffcore_rename(struct diff_options *); +extern void diffcore_merge_broken(void); +extern void diffcore_pickaxe(const char *needle, int opts); +extern void diffcore_order(const char *orderfile); + +#define DIFF_DEBUG 0 +#if DIFF_DEBUG +void diff_debug_filespec(struct diff_filespec *, int, const char *); +void diff_debug_filepair(const struct diff_filepair *, int); +void diff_debug_queue(const char *, struct diff_queue_struct *); +#else +#define diff_debug_filespec(a,b,c) do {} while(0) +#define diff_debug_filepair(a,b) do {} while(0) +#define diff_debug_queue(a,b) do {} while(0) +#endif + +extern int diffcore_count_changes(void *src, unsigned long src_size, + void *dst, unsigned long dst_size, + void **src_count_p, + void **dst_count_p, + unsigned long delta_limit, + unsigned long *src_copied, + unsigned long *literal_added); + +#endif |