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 struct 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
  31 extern struct diff_filespec *alloc_filespec(const char *);
  32 extern void fill_filespec(struct diff_filespec *, const unsigned char *,
  33                           unsigned short);
  34
  35 extern int diff_populate_filespec(struct diff_filespec *, int);
  36 extern void diff_free_filespec_data(struct diff_filespec *);
  37
  38 struct 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
  60 extern void diff_free_filepair(struct diff_filepair *);
  61
  62 extern int diff_unmodified_pair(struct diff_filepair *);
  63
  64 struct diff_queue_struct {
  65         struct diff_filepair **queue;
  66         int alloc;
  67         int nr;
  68 };
  69
  70 extern struct diff_queue_struct diff_queued_diff;
  71 extern struct diff_filepair *diff_queue(struct diff_queue_struct *,
  72                                         struct diff_filespec *,
  73                                         struct diff_filespec *);
  74 extern void diff_q(struct diff_queue_struct *, struct diff_filepair *);
  75
  76 extern void diffcore_pathspec(const char **pathspec);
  77 extern void diffcore_break(int);
  78 extern void diffcore_rename(int rename_copy, int);
  79 extern void diffcore_pickaxe(const char *needle, int opts);
  80 extern void diffcore_order(const char *orderfile);
  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