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 10000
  12#define DEFAULT_MINIMUM_SCORE 5000
  13
  14#define RENAME_DST_MATCHED 01
  15#define RENAME_SRC_GONE    02
  16#define RENAME_SCORE_SHIFT 8
  17
  18struct diff_filespec {
  19        unsigned char sha1[20];
  20        char *path;
  21        void *data;
  22        unsigned long size;
  23        int xfrm_flags;          /* for use by the xfrm */
  24        unsigned short mode;     /* file mode */
  25        unsigned sha1_valid : 1; /* if true, use sha1 and trust mode;
  26                                  * if false, use the name and read from
  27                                  * the filesystem.
  28                                  */
  29#define DIFF_FILE_VALID(spec) (((spec)->mode) != 0)
  30        unsigned should_free : 1; /* data should be free()'ed */
  31        unsigned should_munmap : 1; /* data should be munmap()'ed */
  32};
  33
  34extern struct diff_filespec *alloc_filespec(const char *);
  35extern void fill_filespec(struct diff_filespec *, const unsigned char *,
  36                          unsigned short);
  37
  38extern int diff_populate_filespec(struct diff_filespec *);
  39extern void diff_free_filespec_data(struct diff_filespec *);
  40
  41struct diff_filepair {
  42        struct diff_filespec *one;
  43        struct diff_filespec *two;
  44        int score; /* only valid when one and two are different paths */
  45        int orig_order; /* the original order of insertion into the queue */
  46        int rename_rank; /* rename/copy dependency needs to enforce
  47                          * certain ordering of patches that later
  48                          * diffcore transformations should not break.
  49                          */
  50};
  51#define DIFF_PAIR_UNMERGED(p) \
  52        (!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two))
  53
  54extern int diff_unmodified_pair(struct diff_filepair *);
  55
  56struct diff_queue_struct {
  57        struct diff_filepair **queue;
  58        int alloc;
  59        int nr;
  60};
  61
  62extern struct diff_queue_struct diff_queued_diff;
  63extern struct diff_filepair *diff_queue(struct diff_queue_struct *,
  64                                        struct diff_filespec *,
  65                                        struct diff_filespec *);
  66extern void diff_q(struct diff_queue_struct *, struct diff_filepair *);
  67
  68extern int diff_needs_to_stay(struct diff_queue_struct *, int,
  69                              struct diff_filespec *);
  70
  71#endif