Andrew's git - gitweb.git/blob

   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
  15#define RENAME_DST_MATCHED 01
  16
  17struct diff_filespec {
  18        unsigned char sha1[20];
  19        char *path;
  20        void *data;
  21        unsigned long size;
  22        int xfrm_flags;          /* for use by the xfrm */
  23        unsigned short mode;     /* file mode */
  24        unsigned sha1_valid : 1; /* if true, use sha1 and trust mode;
  25                                  * if false, use the name and read from
  26                                  * the filesystem.
  27                                  */
  28#define DIFF_FILE_VALID(spec) (((spec)->mode) != 0)
  29        unsigned should_free : 1; /* data should be free()'ed */
  30        unsigned should_munmap : 1; /* data should be munmap()'ed */
  31};
  32
  33extern struct diff_filespec *alloc_filespec(const char *);
  34extern void fill_filespec(struct diff_filespec *, const unsigned char *,
  35                          unsigned short);
  36
  37extern int diff_populate_filespec(struct diff_filespec *, int);
  38extern void diff_free_filespec_data(struct diff_filespec *);
  39
  40struct diff_filepair {
  41        struct diff_filespec *one;
  42        struct diff_filespec *two;
  43        unsigned short int score;
  44        char status; /* M C R N D U (see Documentation/diff-format.txt) */
  45        unsigned source_stays : 1; /* all of R/C are copies */
  46        unsigned broken_pair : 1;
  47};
  48#define DIFF_PAIR_UNMERGED(p) \
  49        (!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two))
  50
  51#define DIFF_PAIR_RENAME(p) (strcmp((p)->one->path, (p)->two->path))
  52
  53#define DIFF_PAIR_BROKEN(p) \
  54        ( (!DIFF_FILE_VALID((p)->one) != !DIFF_FILE_VALID((p)->two)) && \
  55          ((p)->broken_pair != 0) )
  56
  57#define DIFF_PAIR_TYPE_CHANGED(p) \
  58        ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode))
  59
  60#define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode)
  61
  62#define DIFF_FILE_CANON_MODE(mode) \
  63        (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
  64        S_ISLNK(mode) ? S_IFLNK : S_IFDIR)
  65
  66extern void diff_free_filepair(struct diff_filepair *);
  67
  68extern int diff_unmodified_pair(struct diff_filepair *);
  69
  70struct diff_queue_struct {
  71        struct diff_filepair **queue;
  72        int alloc;
  73        int nr;
  74};
  75
  76extern struct diff_queue_struct diff_queued_diff;
  77extern struct diff_filepair *diff_queue(struct diff_queue_struct *,
  78                                        struct diff_filespec *,
  79                                        struct diff_filespec *);
  80extern void diff_q(struct diff_queue_struct *, struct diff_filepair *);
  81
  82#define DIFF_DEBUG 0
  83#if DIFF_DEBUG
  84void diff_debug_filespec(struct diff_filespec *, int, const char *);
  85void diff_debug_filepair(const struct diff_filepair *, int);
  86void diff_debug_queue(const char *, struct diff_queue_struct *);
  87#else
  88#define diff_debug_filespec(a,b,c) do {} while(0)
  89#define diff_debug_filepair(a,b) do {} while(0)
  90#define diff_debug_queue(a,b) do {} while(0)
  91#endif
  92
  93#endif