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1f4b32c1c1628b1f040da0421423cf5cfb8561ad
   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 60000
  12#define DEFAULT_RENAME_SCORE 30000 /* rename/copy similarity minimum (50%) */
  13#define DEFAULT_BREAK_SCORE  59400 /* minimum for break to happen (99%)*/
  14
  15struct diff_filespec {
  16        unsigned char sha1[20];
  17        char *path;
  18        void *data;
  19        unsigned long size;
  20        int xfrm_flags;          /* for use by the xfrm */
  21        unsigned short mode;     /* file mode */
  22        unsigned sha1_valid : 1; /* if true, use sha1 and trust mode;
  23                                  * if false, use the name and read from
  24                                  * the filesystem.
  25                                  */
  26#define DIFF_FILE_VALID(spec) (((spec)->mode) != 0)
  27        unsigned should_free : 1; /* data should be free()'ed */
  28        unsigned should_munmap : 1; /* data should be munmap()'ed */
  29};
  30
  31extern struct diff_filespec *alloc_filespec(const char *);
  32extern void fill_filespec(struct diff_filespec *, const unsigned char *,
  33                          unsigned short);
  34
  35extern int diff_populate_filespec(struct diff_filespec *, int);
  36extern void diff_free_filespec_data(struct diff_filespec *);
  37
  38struct diff_filepair {
  39        struct diff_filespec *one;
  40        struct diff_filespec *two;
  41        unsigned short int score;
  42        char status; /* M C R N D U (see Documentation/diff-format.txt) */
  43        unsigned source_stays : 1; /* all of R/C are copies */
  44        unsigned broken_pair : 1;
  45};
  46#define DIFF_PAIR_UNMERGED(p) \
  47        (!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two))
  48
  49#define DIFF_PAIR_RENAME(p) (strcmp((p)->one->path, (p)->two->path))
  50
  51#define DIFF_PAIR_BROKEN(p) \
  52        ( (!DIFF_FILE_VALID((p)->one) != !DIFF_FILE_VALID((p)->two)) && \
  53          ((p)->broken_pair != 0) )
  54
  55#define DIFF_PAIR_TYPE_CHANGED(p) \
  56        ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode))
  57
  58#define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode)
  59
  60extern void diff_free_filepair(struct diff_filepair *);
  61
  62extern int diff_unmodified_pair(struct diff_filepair *);
  63
  64struct diff_queue_struct {
  65        struct diff_filepair **queue;
  66        int alloc;
  67        int nr;
  68};
  69
  70extern struct diff_queue_struct diff_queued_diff;
  71extern struct diff_filepair *diff_queue(struct diff_queue_struct *,
  72                                        struct diff_filespec *,
  73                                        struct diff_filespec *);
  74extern void diff_q(struct diff_queue_struct *, struct diff_filepair *);
  75
  76#define DIFF_DEBUG 0
  77#if DIFF_DEBUG
  78void diff_debug_filespec(struct diff_filespec *, int, const char *);
  79void diff_debug_filepair(const struct diff_filepair *, int);
  80void diff_debug_queue(const char *, struct diff_queue_struct *);
  81#else
  82#define diff_debug_filespec(a,b,c) do {} while(0)
  83#define diff_debug_filepair(a,b) do {} while(0)
  84#define diff_debug_queue(a,b) do {} while(0)
  85#endif
  86
  87#endif