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 extern void update_tree_entry(struct tree_desc *);
  17 extern const unsigned char *tree_entry_extract(struct tree_desc *, const char **, unsigned int *);
  18
  19 struct diff_options;
  20
  21 typedef void (*change_fn_t)(struct diff_options *options,
  22                  unsigned old_mode, unsigned new_mode,
  23                  const unsigned char *old_sha1,
  24                  const unsigned char *new_sha1,
  25                  const char *base, const char *path);
  26
  27 typedef void (*add_remove_fn_t)(struct diff_options *options,
  28                     int addremove, unsigned mode,
  29                     const unsigned char *sha1,
  30                     const char *base, const char *path);
  31
  32 struct diff_options {
  33         const char **paths;
  34         const char *filter;
  35         const char *orderfile;
  36         const char *pickaxe;
  37         unsigned recursive:1,
  38                  tree_in_recursive:1,
  39                  full_index:1;
  40         int break_opt;
  41         int detect_rename;
  42         int find_copies_harder;
  43         int line_termination;
  44         int output_format;
  45         int pickaxe_opts;
  46         int rename_score;
  47         int reverse_diff;
  48         int rename_limit;
  49         int setup;
  50         int abbrev;
  51
  52         change_fn_t change;
  53         add_remove_fn_t add_remove;
  54 };
  55
  56 extern void diff_tree_setup_paths(const char **paths);
  57 extern int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
  58                      const char *base, struct diff_options *opt);
  59 extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
  60                           const char *base, struct diff_options *opt);
  61
  62 struct combine_diff_path {
  63         struct combine_diff_path *next;
  64         int len;
  65         char *path;
  66         unsigned int mode;
  67         unsigned char sha1[20];
  68         struct combine_diff_parent {
  69                 char status;
  70                 unsigned int mode;
  71                 unsigned char sha1[20];
  72         } parent[FLEX_ARRAY];
  73 };
  74 #define combine_diff_path_size(n, l) \
  75         (sizeof(struct combine_diff_path) + \
  76          sizeof(struct combine_diff_parent) * (n) + (l) + 1)
  77
  78 extern int show_combined_diff(struct combine_diff_path *elem, int num_parent,
  79                               int dense, const char *header,
  80                               struct diff_options *);
  81
  82 extern const char *diff_tree_combined_merge(const unsigned char *sha1, const char *, int, struct diff_options *opt);
  83
  84 extern void diff_addremove(struct diff_options *,
  85                            int addremove,
  86                            unsigned mode,
  87                            const unsigned char *sha1,
  88                            const char *base,
  89                            const char *path);
  90
  91 extern void diff_change(struct diff_options *,
  92                         unsigned mode1, unsigned mode2,
  93                         const unsigned char *sha1,
  94                         const unsigned char *sha2,
  95                         const char *base, const char *path);
  96
  97 extern void diff_unmerge(struct diff_options *,
  98                          const char *path);
  99
 100 extern int diff_scoreopt_parse(const char *opt);
 101
 102 #define DIFF_SETUP_REVERSE              1
 103 #define DIFF_SETUP_USE_CACHE            2
 104 #define DIFF_SETUP_USE_SIZE_CACHE       4
 105
 106 extern int git_diff_config(const char *var, const char *value);
 107 extern void diff_setup(struct diff_options *);
 108 extern int diff_opt_parse(struct diff_options *, const char **, int);
 109 extern int diff_setup_done(struct diff_options *);
 110
 111 #define DIFF_DETECT_RENAME      1
 112 #define DIFF_DETECT_COPY        2
 113
 114 #define DIFF_PICKAXE_ALL        1
 115
 116 extern void diffcore_std(struct diff_options *);
 117
 118 extern void diffcore_std_no_resolve(struct diff_options *);
 119
 120 #define COMMON_DIFF_OPTIONS_HELP \
 121 "\ncommon diff options:\n" \
 122 "  -z            output diff-raw with lines terminated with NUL.\n" \
 123 "  -p            output patch format.\n" \
 124 "  -u            synonym for -p.\n" \
 125 "  --name-only   show only names of changed files.\n" \
 126 "  --name-status show names and status of changed files.\n" \
 127 "  --full-index  show full object name on index lines.\n" \
 128 "  --abbrev=<n>  abbreviate object names in diff-tree header and diff-raw.\n" \
 129 "  -R            swap input file pairs.\n" \
 130 "  -B            detect complete rewrites.\n" \
 131 "  -M            detect renames.\n" \
 132 "  -C            detect copies.\n" \
 133 "  --find-copies-harder\n" \
 134 "                try unchanged files as candidate for copy detection.\n" \
 135 "  -l<n>         limit rename attempts up to <n> paths.\n" \
 136 "  -O<file>      reorder diffs according to the <file>.\n" \
 137 "  -S<string>    find filepair whose only one side contains the string.\n" \
 138 "  --pickaxe-all\n" \
 139 "                show all files diff when -S is used and hit is found.\n"
 140
 141 extern int diff_queue_is_empty(void);
 142
 143 #define DIFF_FORMAT_RAW         1
 144 #define DIFF_FORMAT_PATCH       2
 145 #define DIFF_FORMAT_NO_OUTPUT   3
 146 #define DIFF_FORMAT_NAME        4
 147 #define DIFF_FORMAT_NAME_STATUS 5
 148
 149 extern void diff_flush(struct diff_options*);
 150
 151 /* diff-raw status letters */
 152 #define DIFF_STATUS_ADDED               'A'
 153 #define DIFF_STATUS_COPIED              'C'
 154 #define DIFF_STATUS_DELETED             'D'
 155 #define DIFF_STATUS_MODIFIED            'M'
 156 #define DIFF_STATUS_RENAMED             'R'
 157 #define DIFF_STATUS_TYPE_CHANGED        'T'
 158 #define DIFF_STATUS_UNKNOWN             'X'
 159 #define DIFF_STATUS_UNMERGED            'U'
 160
 161 /* these are not diff-raw status letters proper, but used by
 162  * diffcore-filter insn to specify additional restrictions.
 163  */
 164 #define DIFF_STATUS_FILTER_AON          '*'
 165 #define DIFF_STATUS_FILTER_BROKEN       'B'
 166
 167 extern const char *diff_unique_abbrev(const unsigned char *, int);
 168
 169 #endif /* DIFF_H */