diff.h

   1 /*
   2  * Copyright (C) 2005 Junio C Hamano
   3  */
   4 #ifndef DIFF_H
   5 #define DIFF_H
   6
   7 #define DIFF_FILE_CANON_MODE(mode) \
   8         (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
   9         S_ISLNK(mode) ? S_IFLNK : S_IFDIR)
  10
  11 struct tree_desc {
  12         void *buf;
  13         unsigned long size;
  14 };
  15
  16 struct diff_options;
  17
  18 typedef void (*change_fn_t)(struct diff_options *options,
  19                  unsigned old_mode, unsigned new_mode,
  20                  const unsigned char *old_sha1,
  21                  const unsigned char *new_sha1,
  22                  const char *base, const char *path);
  23
  24 typedef void (*add_remove_fn_t)(struct diff_options *options,
  25                     int addremove, unsigned mode,
  26                     const unsigned char *sha1,
  27                     const char *base, const char *path);
  28
  29 struct diff_options {
  30         const char **paths;
  31         const char *filter;
  32         const char *orderfile;
  33         const char *pickaxe;
  34         unsigned recursive:1,
  35                  tree_in_recursive:1,
  36                  full_index:1;
  37         int break_opt;
  38         int detect_rename;
  39         int find_copies_harder;
  40         int line_termination;
  41         int output_format;
  42         int pickaxe_opts;
  43         int rename_score;
  44         int reverse_diff;
  45         int rename_limit;
  46         int setup;
  47         int abbrev;
  48
  49         change_fn_t change;
  50         add_remove_fn_t add_remove;
  51 };
  52
  53 extern void diff_tree_setup_paths(const char **paths);
  54 extern int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
  55                      const char *base, struct diff_options *opt);
  56 extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
  57                           const char *base, struct diff_options *opt);
  58
  59 struct combine_diff_path {
  60         struct combine_diff_path *next;
  61         int len;
  62         char *path;
  63         unsigned char sha1[20];
  64         unsigned char parent_sha1[FLEX_ARRAY][20];
  65 };
  66
  67 int show_combined_diff(struct combine_diff_path *elem, int num_parent,
  68                        int dense, const char *header, int show_empty);
  69
  70 extern int diff_tree_combined_merge(const unsigned char *sha1, const char *, int, int);
  71
  72 extern void diff_addremove(struct diff_options *,
  73                            int addremove,
  74                            unsigned mode,
  75                            const unsigned char *sha1,
  76                            const char *base,
  77                            const char *path);
  78
  79 extern void diff_change(struct diff_options *,
  80                         unsigned mode1, unsigned mode2,
  81                         const unsigned char *sha1,
  82                         const unsigned char *sha2,
  83                         const char *base, const char *path);
  84
  85 extern void diff_unmerge(struct diff_options *,
  86                          const char *path);
  87
  88 extern int diff_scoreopt_parse(const char *opt);
  89
  90 #define DIFF_SETUP_REVERSE              1
  91 #define DIFF_SETUP_USE_CACHE            2
  92 #define DIFF_SETUP_USE_SIZE_CACHE       4
  93
  94 extern int git_diff_config(const char *var, const char *value);
  95 extern void diff_setup(struct diff_options *);
  96 extern int diff_opt_parse(struct diff_options *, const char **, int);
  97 extern int diff_setup_done(struct diff_options *);
  98
  99 #define DIFF_DETECT_RENAME      1
 100 #define DIFF_DETECT_COPY        2
 101
 102 #define DIFF_PICKAXE_ALL        1
 103
 104 #define DIFF_DEFAULT_INDEX_ABBREV       7 /* hex digits */
 105 #define DIFF_DEFAULT_ABBREV     7 /* hex digits */
 106
 107 extern void diffcore_std(struct diff_options *);
 108
 109 extern void diffcore_std_no_resolve(struct diff_options *);
 110
 111 #define COMMON_DIFF_OPTIONS_HELP \
 112 "\ncommon diff options:\n" \
 113 "  -z            output diff-raw with lines terminated with NUL.\n" \
 114 "  -p            output patch format.\n" \
 115 "  -u            synonym for -p.\n" \
 116 "  --name-only   show only names of changed files.\n" \
 117 "  --name-status show names and status of changed files.\n" \
 118 "  --full-index  show full object name on index lines.\n" \
 119 "  --abbrev=<n>  abbreviate object names in diff-tree header and diff-raw.\n" \
 120 "  -R            swap input file pairs.\n" \
 121 "  -B            detect complete rewrites.\n" \
 122 "  -M            detect renames.\n" \
 123 "  -C            detect copies.\n" \
 124 "  --find-copies-harder\n" \
 125 "                try unchanged files as candidate for copy detection.\n" \
 126 "  -l<n>         limit rename attempts up to <n> paths.\n" \
 127 "  -O<file>      reorder diffs according to the <file>.\n" \
 128 "  -S<string>    find filepair whose only one side contains the string.\n" \
 129 "  --pickaxe-all\n" \
 130 "                show all files diff when -S is used and hit is found.\n"
 131
 132 extern int diff_queue_is_empty(void);
 133
 134 #define DIFF_FORMAT_RAW         1
 135 #define DIFF_FORMAT_PATCH       2
 136 #define DIFF_FORMAT_NO_OUTPUT   3
 137 #define DIFF_FORMAT_NAME        4
 138 #define DIFF_FORMAT_NAME_STATUS 5
 139
 140 extern void diff_flush(struct diff_options*);
 141
 142 /* diff-raw status letters */
 143 #define DIFF_STATUS_ADDED               'A'
 144 #define DIFF_STATUS_COPIED              'C'
 145 #define DIFF_STATUS_DELETED             'D'
 146 #define DIFF_STATUS_MODIFIED            'M'
 147 #define DIFF_STATUS_RENAMED             'R'
 148 #define DIFF_STATUS_TYPE_CHANGED        'T'
 149 #define DIFF_STATUS_UNKNOWN             'X'
 150 #define DIFF_STATUS_UNMERGED            'U'
 151
 152 /* these are not diff-raw status letters proper, but used by
 153  * diffcore-filter insn to specify additional restrictions.
 154  */
 155 #define DIFF_STATUS_FILTER_AON          '*'
 156 #define DIFF_STATUS_FILTER_BROKEN       'B'
 157
 158 extern const char *diff_unique_abbrev(const unsigned char *, int);
 159
 160 #endif /* DIFF_H */