git/diff.h

   1 /*
   2  * Copyright (C) 2005 Junio C Hamano
   3  */
   4 #ifndef DIFF_H
   5 #define DIFF_H
   6
   7 #include "tree-walk.h"
   8
   9 struct rev_info;
  10 struct diff_options;
  11 struct diff_queue_struct;
  12
  13 typedef void (*change_fn_t)(struct diff_options *options,
  14                  unsigned old_mode, unsigned new_mode,
  15                  const unsigned char *old_sha1,
  16                  const unsigned char *new_sha1,
  17                  const char *base, const char *path);
  18
  19 typedef void (*add_remove_fn_t)(struct diff_options *options,
  20                     int addremove, unsigned mode,
  21                     const unsigned char *sha1,
  22                     const char *base, const char *path);
  23
  24 typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
  25                 struct diff_options *options, void *data);
  26
  27 #define DIFF_FORMAT_RAW         0x0001
  28 #define DIFF_FORMAT_DIFFSTAT    0x0002
  29 #define DIFF_FORMAT_NUMSTAT     0x0004
  30 #define DIFF_FORMAT_SUMMARY     0x0008
  31 #define DIFF_FORMAT_PATCH       0x0010
  32 #define DIFF_FORMAT_SHORTSTAT   0x0020
  33
  34 /* These override all above */
  35 #define DIFF_FORMAT_NAME        0x0100
  36 #define DIFF_FORMAT_NAME_STATUS 0x0200
  37 #define DIFF_FORMAT_CHECKDIFF   0x0400
  38
  39 /* Same as output_format = 0 but we know that -s flag was given
  40  * and we should not give default value to output_format.
  41  */
  42 #define DIFF_FORMAT_NO_OUTPUT   0x0800
  43
  44 #define DIFF_FORMAT_CALLBACK    0x1000
  45
  46 struct diff_options {
  47         const char *filter;
  48         const char *orderfile;
  49         const char *pickaxe;
  50         const char *single_follow;
  51         unsigned recursive:1,
  52                  tree_in_recursive:1,
  53                  binary:1,
  54                  text:1,
  55                  full_index:1,
  56                  silent_on_remove:1,
  57                  find_copies_harder:1,
  58                  follow_renames:1,
  59                  color_diff:1,
  60                  color_diff_words:1,
  61                  has_changes:1,
  62                  quiet:1,
  63                  allow_external:1,
  64                  exit_with_status:1;
  65         int context;
  66         int break_opt;
  67         int detect_rename;
  68         int line_termination;
  69         int output_format;
  70         int pickaxe_opts;
  71         int rename_score;
  72         int reverse_diff;
  73         int rename_limit;
  74         int setup;
  75         int abbrev;
  76         const char *msg_sep;
  77         const char *stat_sep;
  78         long xdl_opts;
  79
  80         int stat_width;
  81         int stat_name_width;
  82
  83         /* this is set by diffcore for DIFF_FORMAT_PATCH */
  84         int found_changes;
  85
  86         int nr_paths;
  87         const char **paths;
  88         int *pathlens;
  89         change_fn_t change;
  90         add_remove_fn_t add_remove;
  91         diff_format_fn_t format_callback;
  92         void *format_callback_data;
  93 };
  94
  95 enum color_diff {
  96         DIFF_RESET = 0,
  97         DIFF_PLAIN = 1,
  98         DIFF_METAINFO = 2,
  99         DIFF_FRAGINFO = 3,
 100         DIFF_FILE_OLD = 4,
 101         DIFF_FILE_NEW = 5,
 102         DIFF_COMMIT = 6,
 103         DIFF_WHITESPACE = 7,
 104 };
 105 const char *diff_get_color(int diff_use_color, enum color_diff ix);
 106
 107 extern const char mime_boundary_leader[];
 108
 109 extern void diff_tree_setup_paths(const char **paths, struct diff_options *);
 110 extern void diff_tree_release_paths(struct diff_options *);
 111 extern int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
 112                      const char *base, struct diff_options *opt);
 113 extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
 114                           const char *base, struct diff_options *opt);
 115 extern int diff_root_tree_sha1(const unsigned char *new, const char *base,
 116                                struct diff_options *opt);
 117
 118 struct combine_diff_path {
 119         struct combine_diff_path *next;
 120         int len;
 121         char *path;
 122         unsigned int mode;
 123         unsigned char sha1[20];
 124         struct combine_diff_parent {
 125                 char status;
 126                 unsigned int mode;
 127                 unsigned char sha1[20];
 128         } parent[FLEX_ARRAY];
 129 };
 130 #define combine_diff_path_size(n, l) \
 131         (sizeof(struct combine_diff_path) + \
 132          sizeof(struct combine_diff_parent) * (n) + (l) + 1)
 133
 134 extern void show_combined_diff(struct combine_diff_path *elem, int num_parent,
 135                               int dense, struct rev_info *);
 136
 137 extern void diff_tree_combined(const unsigned char *sha1, const unsigned char parent[][20], int num_parent, int dense, struct rev_info *rev);
 138
 139 extern void diff_tree_combined_merge(const unsigned char *sha1, int, struct rev_info *);
 140
 141 extern void diff_addremove(struct diff_options *,
 142                            int addremove,
 143                            unsigned mode,
 144                            const unsigned char *sha1,
 145                            const char *base,
 146                            const char *path);
 147
 148 extern void diff_change(struct diff_options *,
 149                         unsigned mode1, unsigned mode2,
 150                         const unsigned char *sha1,
 151                         const unsigned char *sha2,
 152                         const char *base, const char *path);
 153
 154 extern void diff_unmerge(struct diff_options *,
 155                          const char *path,
 156                          unsigned mode,
 157                          const unsigned char *sha1);
 158
 159 #define DIFF_SETUP_REVERSE              1
 160 #define DIFF_SETUP_USE_CACHE            2
 161 #define DIFF_SETUP_USE_SIZE_CACHE       4
 162
 163 extern int git_diff_ui_config(const char *var, const char *value);
 164 extern void diff_setup(struct diff_options *);
 165 extern int diff_opt_parse(struct diff_options *, const char **, int);
 166 extern int diff_setup_done(struct diff_options *);
 167
 168 #define DIFF_DETECT_RENAME      1
 169 #define DIFF_DETECT_COPY        2
 170
 171 #define DIFF_PICKAXE_ALL        1
 172 #define DIFF_PICKAXE_REGEX      2
 173
 174 extern void diffcore_std(struct diff_options *);
 175
 176 #define COMMON_DIFF_OPTIONS_HELP \
 177 "\ncommon diff options:\n" \
 178 "  -z            output diff-raw with lines terminated with NUL.\n" \
 179 "  -p            output patch format.\n" \
 180 "  -u            synonym for -p.\n" \
 181 "  --patch-with-raw\n" \
 182 "                output both a patch and the diff-raw format.\n" \
 183 "  --stat        show diffstat instead of patch.\n" \
 184 "  --numstat     show numeric diffstat instead of patch.\n" \
 185 "  --patch-with-stat\n" \
 186 "                output a patch and prepend its diffstat.\n" \
 187 "  --name-only   show only names of changed files.\n" \
 188 "  --name-status show names and status of changed files.\n" \
 189 "  --full-index  show full object name on index lines.\n" \
 190 "  --abbrev=<n>  abbreviate object names in diff-tree header and diff-raw.\n" \
 191 "  -R            swap input file pairs.\n" \
 192 "  -B            detect complete rewrites.\n" \
 193 "  -M            detect renames.\n" \
 194 "  -C            detect copies.\n" \
 195 "  --find-copies-harder\n" \
 196 "                try unchanged files as candidate for copy detection.\n" \
 197 "  -l<n>         limit rename attempts up to <n> paths.\n" \
 198 "  -O<file>      reorder diffs according to the <file>.\n" \
 199 "  -S<string>    find filepair whose only one side contains the string.\n" \
 200 "  --pickaxe-all\n" \
 201 "                show all files diff when -S is used and hit is found.\n" \
 202 "  -a  --text    treat all files as text.\n"
 203
 204 extern int diff_queue_is_empty(void);
 205 extern void diff_flush(struct diff_options*);
 206
 207 /* diff-raw status letters */
 208 #define DIFF_STATUS_ADDED               'A'
 209 #define DIFF_STATUS_COPIED              'C'
 210 #define DIFF_STATUS_DELETED             'D'
 211 #define DIFF_STATUS_MODIFIED            'M'
 212 #define DIFF_STATUS_RENAMED             'R'
 213 #define DIFF_STATUS_TYPE_CHANGED        'T'
 214 #define DIFF_STATUS_UNKNOWN             'X'
 215 #define DIFF_STATUS_UNMERGED            'U'
 216
 217 /* these are not diff-raw status letters proper, but used by
 218  * diffcore-filter insn to specify additional restrictions.
 219  */
 220 #define DIFF_STATUS_FILTER_AON          '*'
 221 #define DIFF_STATUS_FILTER_BROKEN       'B'
 222
 223 extern const char *diff_unique_abbrev(const unsigned char *, int);
 224
 225 extern int run_diff_files(struct rev_info *revs, int silent_on_removed);
 226 extern int setup_diff_no_index(struct rev_info *revs,
 227                 int argc, const char ** argv, int nongit, const char *prefix);
 228 extern int run_diff_files_cmd(struct rev_info *revs, int argc, const char **argv);
 229
 230 extern int run_diff_index(struct rev_info *revs, int cached);
 231
 232 extern int do_diff_cache(const unsigned char *, struct diff_options *);
 233 extern int diff_flush_patch_id(struct diff_options *, unsigned char *);
 234
 235 #endif /* DIFF_H */