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
  16struct 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
  32extern struct diff_filespec *alloc_filespec(const char *);
  33extern void fill_filespec(struct diff_filespec *, const unsigned char *,
  34                          unsigned short);
  35
  36extern int diff_populate_filespec(struct diff_filespec *, int);
  37extern void diff_free_filespec_data(struct diff_filespec *);
  38
  39struct diff_filepair {
  40        struct diff_filespec *one;
  41        struct diff_filespec *two;
  42        unsigned short int score; /* only valid when one and two are
  43                                   * different paths
  44                                   */
  45        char source_stays; /* all of R/C are copies */
  46        char status; /* M C R N D U (see Documentation/diff-format.txt) */
  47};
  48#define DIFF_PAIR_UNMERGED(p) \
  49        (!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two))
  50
  51#define DIFF_PAIR_TYPE_CHANGED(p) \
  52        ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode))
  53
  54#define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode)
  55
  56#define DIFF_FILE_CANON_MODE(mode) \
  57        (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
  58        S_ISLNK(mode) ? S_IFLNK : S_IFDIR)
  59
  60extern void diff_free_filepair(struct diff_filepair *);
  61
  62extern int diff_unmodified_pair(struct diff_filepair *);
  63
  64struct diff_queue_struct {
  65        struct diff_filepair **queue;
  66        int alloc;
  67        int nr;
  68};
  69
  70extern struct diff_queue_struct diff_queued_diff;
  71extern struct diff_filepair *diff_queue(struct diff_queue_struct *,
  72                                        struct diff_filespec *,
  73                                        struct diff_filespec *);
  74extern void diff_q(struct diff_queue_struct *, struct diff_filepair *);
  75
  76#define DIFF_DEBUG 0
  77#if DIFF_DEBUG
  78void diff_debug_filespec(struct diff_filespec *, int, const char *);
  79void diff_debug_filepair(const struct diff_filepair *, int);
  80void diff_debug_queue(const char *, struct diff_queue_struct *);
  81#else
  82#define diff_debug_filespec(a,b,c) do {} while(0)
  83#define diff_debug_filepair(a,b) do {} while(0)
  84#define diff_debug_queue(a,b) do {} while(0)
  85#endif
  86
  87#endif