src/diff.h

   1 /*
   2  * Copyright (C) the libgit2 contributors. All rights reserved.
   3  *
   4  * This file is part of libgit2, distributed under the GNU GPL v2 with
   5  * a Linking Exception. For full terms see the included COPYING file.
   6  */
   7 #ifndef INCLUDE_diff_h__
   8 #define INCLUDE_diff_h__
   9
  10 #include "git2/diff.h"
  11 #include "git2/oid.h"
  12
  13 #include <stdio.h>
  14 #include "vector.h"
  15 #include "buffer.h"
  16 #include "iterator.h"
  17 #include "repository.h"
  18 #include "pool.h"
  19
  20 #define DIFF_OLD_PREFIX_DEFAULT "a/"
  21 #define DIFF_NEW_PREFIX_DEFAULT "b/"
  22
  23 enum {
  24         GIT_DIFFCAPS_HAS_SYMLINKS     = (1 << 0), /* symlinks on platform? */
  25         GIT_DIFFCAPS_ASSUME_UNCHANGED = (1 << 1), /* use stat? */
  26         GIT_DIFFCAPS_TRUST_MODE_BITS  = (1 << 2), /* use st_mode? */
  27         GIT_DIFFCAPS_TRUST_CTIME      = (1 << 3), /* use st_ctime? */
  28         GIT_DIFFCAPS_USE_DEV          = (1 << 4), /* use st_dev? */
  29         GIT_DIFFCAPS_TRUST_NANOSECS   = (1 << 5), /* use stat time nanoseconds */
  30 };
  31
  32 #define DIFF_FLAGS_KNOWN_BINARY (GIT_DIFF_FLAG_BINARY|GIT_DIFF_FLAG_NOT_BINARY)
  33 #define DIFF_FLAGS_NOT_BINARY   (GIT_DIFF_FLAG_NOT_BINARY|GIT_DIFF_FLAG__NO_DATA)
  34
  35 enum {
  36         GIT_DIFF_FLAG__FREE_PATH  = (1 << 7),  /* `path` is allocated memory */
  37         GIT_DIFF_FLAG__FREE_DATA  = (1 << 8),  /* internal file data is allocated */
  38         GIT_DIFF_FLAG__UNMAP_DATA = (1 << 9),  /* internal file data is mmap'ed */
  39         GIT_DIFF_FLAG__NO_DATA    = (1 << 10), /* file data should not be loaded */
  40         GIT_DIFF_FLAG__FREE_BLOB  = (1 << 11), /* release the blob when done */
  41         GIT_DIFF_FLAG__LOADED     = (1 << 12), /* file data has been loaded */
  42
  43         GIT_DIFF_FLAG__TO_DELETE  = (1 << 16), /* delete entry during rename det. */
  44         GIT_DIFF_FLAG__TO_SPLIT   = (1 << 17), /* split entry during rename det. */
  45         GIT_DIFF_FLAG__IS_RENAME_TARGET = (1 << 18),
  46         GIT_DIFF_FLAG__IS_RENAME_SOURCE = (1 << 19),
  47         GIT_DIFF_FLAG__HAS_SELF_SIMILARITY = (1 << 20),
  48 };
  49
  50 #define GIT_DIFF_FLAG__CLEAR_INTERNAL(F) (F) = ((F) & 0x00FFFF)
  51
  52 #define GIT_DIFF__VERBOSE  (1 << 30)
  53
  54 struct git_diff_list {
  55         git_refcount     rc;
  56         git_repository   *repo;
  57         git_diff_options opts;
  58         git_vector       pathspec;
  59         git_vector       deltas;    /* vector of git_diff_delta */
  60         git_pool pool;
  61         git_iterator_type_t old_src;
  62         git_iterator_type_t new_src;
  63         uint32_t diffcaps;
  64
  65         int (*strcomp)(const char *, const char *);
  66         int (*strncomp)(const char *, const char *, size_t);
  67         int (*pfxcomp)(const char *str, const char *pfx);
  68         int (*entrycomp)(const void *a, const void *b);
  69 };
  70
  71 extern void git_diff__cleanup_modes(
  72         uint32_t diffcaps, uint32_t *omode, uint32_t *nmode);
  73
  74 extern void git_diff_list_addref(git_diff_list *diff);
  75
  76 extern int git_diff_delta__cmp(const void *a, const void *b);
  77 extern int git_diff_delta__casecmp(const void *a, const void *b);
  78
  79 extern const char *git_diff_delta__path(const git_diff_delta *delta);
  80
  81 extern bool git_diff_delta__should_skip(
  82         const git_diff_options *opts, const git_diff_delta *delta);
  83
  84 extern int git_diff__oid_for_file(
  85         git_repository *, const char *, uint16_t, git_off_t, git_oid *);
  86
  87 extern int git_diff__from_iterators(
  88         git_diff_list **diff_ptr,
  89         git_repository *repo,
  90         git_iterator *old_iter,
  91         git_iterator *new_iter,
  92         const git_diff_options *opts);
  93
  94 extern int git_diff__paired_foreach(
  95         git_diff_list *idx2head,
  96         git_diff_list *wd2idx,
  97         int (*cb)(git_diff_delta *i2h, git_diff_delta *w2i, void *payload),
  98         void *payload);
  99
 100 extern int git_diff_find_similar__hashsig_for_file(
 101         void **out, const git_diff_file *f, const char *path, void *p);
 102
 103 extern int git_diff_find_similar__hashsig_for_buf(
 104         void **out, const git_diff_file *f, const char *buf, size_t len, void *p);
 105
 106 extern void git_diff_find_similar__hashsig_free(void *sig, void *payload);
 107
 108 extern int git_diff_find_similar__calc_similarity(
 109         int *score, void *siga, void *sigb, void *payload);
 110
 111 #endif
 112