diffcore.h

   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
  17 struct 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
  33 extern struct diff_filespec *alloc_filespec(const char *);
  34 extern void fill_filespec(struct diff_filespec *, const unsigned char *,
  35                           unsigned short);
  36
  37 extern int diff_populate_filespec(struct diff_filespec *, int);
  38 extern void diff_free_filespec_data(struct diff_filespec *);
  39
  40 struct 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
  66 extern void diff_free_filepair(struct diff_filepair *);
  67
  68 extern int diff_unmodified_pair(struct diff_filepair *);
  69
  70 struct diff_queue_struct {
  71         struct diff_filepair **queue;
  72         int alloc;
  73         int nr;
  74 };
  75
  76 extern struct diff_queue_struct diff_queued_diff;
  77 extern struct diff_filepair *diff_queue(struct diff_queue_struct *,
  78                                         struct diff_filespec *,
  79                                         struct diff_filespec *);
  80 extern void diff_q(struct diff_queue_struct *, struct diff_filepair *);
  81
  82 #define DIFF_DEBUG 0
  83 #if DIFF_DEBUG
  84 void diff_debug_filespec(struct diff_filespec *, int, const char *);
  85 void diff_debug_filepair(const struct diff_filepair *, int);
  86 void 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