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 10000
  12 #define DEFAULT_MINIMUM_SCORE 5000
  13
  14 #define RENAME_DST_MATCHED 01
  15
  16 struct diff_filespec {
  17         unsigned char sha1[20];
  18         char *path;
  19         void *data;
  20         unsigned long size;
  21         int xfrm_flags;          /* for use by the xfrm */
  22         unsigned short mode;     /* file mode */
  23         unsigned sha1_valid : 1; /* if true, use sha1 and trust mode;
  24                                   * if false, use the name and read from
  25                                   * the filesystem.
  26                                   */
  27 #define DIFF_FILE_VALID(spec) (((spec)->mode) != 0)
  28         unsigned should_free : 1; /* data should be free()'ed */
  29         unsigned should_munmap : 1; /* data should be munmap()'ed */
  30 };
  31
  32 extern struct diff_filespec *alloc_filespec(const char *);
  33 extern void fill_filespec(struct diff_filespec *, const unsigned char *,
  34                           unsigned short);
  35
  36 extern int diff_populate_filespec(struct diff_filespec *);
  37 extern void diff_free_filespec_data(struct diff_filespec *);
  38
  39 struct diff_filepair {
  40         struct diff_filespec *one;
  41         struct diff_filespec *two;
  42         int score; /* only valid when one and two are different paths */
  43         int orig_order; /* the original order of insertion into the queue */
  44         int rename_rank; /* rename/copy dependency needs to enforce
  45                           * certain ordering of patches that later
  46                           * diffcore transformations should not break.
  47                           */
  48         int status; /* M C R N D U (see Documentation/diff-format.txt) */
  49 };
  50 #define DIFF_PAIR_UNMERGED(p) \
  51         (!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two))
  52
  53 extern int diff_unmodified_pair(struct diff_filepair *);
  54
  55 struct diff_queue_struct {
  56         struct diff_filepair **queue;
  57         int alloc;
  58         int nr;
  59 };
  60
  61 extern struct diff_queue_struct diff_queued_diff;
  62 extern struct diff_filepair *diff_queue(struct diff_queue_struct *,
  63                                         struct diff_filespec *,
  64                                         struct diff_filespec *);
  65 extern void diff_q(struct diff_queue_struct *, struct diff_filepair *);
  66
  67 extern int diff_needs_to_stay(struct diff_queue_struct *, int,
  68                               struct diff_filespec *);
  69
  70 #endif