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 struct strbuf;
  13 struct diff_filespec;
  14 struct userdiff_driver;
  15 struct sha1_array;
  16 struct commit;
  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                  int old_sha1_valid, int new_sha1_valid,
  23                  const char *fullpath,
  24                  unsigned old_dirty_submodule, unsigned new_dirty_submodule);
  25
  26 typedef void (*add_remove_fn_t)(struct diff_options *options,
  27                     int addremove, unsigned mode,
  28                     const unsigned char *sha1,
  29                     int sha1_valid,
  30                     const char *fullpath, unsigned dirty_submodule);
  31
  32 typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
  33                 struct diff_options *options, void *data);
  34
  35 typedef struct strbuf *(*diff_prefix_fn_t)(struct diff_options *opt, void *data);
  36
  37 #define DIFF_FORMAT_RAW         0x0001
  38 #define DIFF_FORMAT_DIFFSTAT    0x0002
  39 #define DIFF_FORMAT_NUMSTAT     0x0004
  40 #define DIFF_FORMAT_SUMMARY     0x0008
  41 #define DIFF_FORMAT_PATCH       0x0010
  42 #define DIFF_FORMAT_SHORTSTAT   0x0020
  43 #define DIFF_FORMAT_DIRSTAT     0x0040
  44
  45 /* These override all above */
  46 #define DIFF_FORMAT_NAME        0x0100
  47 #define DIFF_FORMAT_NAME_STATUS 0x0200
  48 #define DIFF_FORMAT_CHECKDIFF   0x0400
  49
  50 /* Same as output_format = 0 but we know that -s flag was given
  51  * and we should not give default value to output_format.
  52  */
  53 #define DIFF_FORMAT_NO_OUTPUT   0x0800
  54
  55 #define DIFF_FORMAT_CALLBACK    0x1000
  56
  57 #define DIFF_OPT_RECURSIVE           (1 <<  0)
  58 #define DIFF_OPT_TREE_IN_RECURSIVE   (1 <<  1)
  59 #define DIFF_OPT_BINARY              (1 <<  2)
  60 #define DIFF_OPT_TEXT                (1 <<  3)
  61 #define DIFF_OPT_FULL_INDEX          (1 <<  4)
  62 #define DIFF_OPT_SILENT_ON_REMOVE    (1 <<  5)
  63 #define DIFF_OPT_FIND_COPIES_HARDER  (1 <<  6)
  64 #define DIFF_OPT_FOLLOW_RENAMES      (1 <<  7)
  65 #define DIFF_OPT_RENAME_EMPTY        (1 <<  8)
  66 /* (1 <<  9) unused */
  67 #define DIFF_OPT_HAS_CHANGES         (1 << 10)
  68 #define DIFF_OPT_QUICK               (1 << 11)
  69 #define DIFF_OPT_NO_INDEX            (1 << 12)
  70 #define DIFF_OPT_ALLOW_EXTERNAL      (1 << 13)
  71 #define DIFF_OPT_EXIT_WITH_STATUS    (1 << 14)
  72 #define DIFF_OPT_REVERSE_DIFF        (1 << 15)
  73 #define DIFF_OPT_CHECK_FAILED        (1 << 16)
  74 #define DIFF_OPT_RELATIVE_NAME       (1 << 17)
  75 #define DIFF_OPT_IGNORE_SUBMODULES   (1 << 18)
  76 #define DIFF_OPT_DIRSTAT_CUMULATIVE  (1 << 19)
  77 #define DIFF_OPT_DIRSTAT_BY_FILE     (1 << 20)
  78 #define DIFF_OPT_ALLOW_TEXTCONV      (1 << 21)
  79 #define DIFF_OPT_DIFF_FROM_CONTENTS  (1 << 22)
  80 #define DIFF_OPT_SUBMODULE_LOG       (1 << 23)
  81 #define DIFF_OPT_DIRTY_SUBMODULES    (1 << 24)
  82 #define DIFF_OPT_IGNORE_UNTRACKED_IN_SUBMODULES (1 << 25)
  83 #define DIFF_OPT_IGNORE_DIRTY_SUBMODULES (1 << 26)
  84 #define DIFF_OPT_OVERRIDE_SUBMODULE_CONFIG (1 << 27)
  85 #define DIFF_OPT_DIRSTAT_BY_LINE     (1 << 28)
  86 #define DIFF_OPT_FUNCCONTEXT         (1 << 29)
  87 #define DIFF_OPT_PICKAXE_IGNORE_CASE (1 << 30)
  88
  89 #define DIFF_OPT_TST(opts, flag)    ((opts)->flags & DIFF_OPT_##flag)
  90 #define DIFF_OPT_SET(opts, flag)    ((opts)->flags |= DIFF_OPT_##flag)
  91 #define DIFF_OPT_CLR(opts, flag)    ((opts)->flags &= ~DIFF_OPT_##flag)
  92 #define DIFF_XDL_TST(opts, flag)    ((opts)->xdl_opts & XDF_##flag)
  93 #define DIFF_XDL_SET(opts, flag)    ((opts)->xdl_opts |= XDF_##flag)
  94 #define DIFF_XDL_CLR(opts, flag)    ((opts)->xdl_opts &= ~XDF_##flag)
  95
  96 #define DIFF_WITH_ALG(opts, flag)   (((opts)->xdl_opts & ~XDF_DIFF_ALGORITHM_MASK) | XDF_##flag)
  97
  98 enum diff_words_type {
  99         DIFF_WORDS_NONE = 0,
 100         DIFF_WORDS_PORCELAIN,
 101         DIFF_WORDS_PLAIN,
 102         DIFF_WORDS_COLOR
 103 };
 104
 105 struct diff_options {
 106         const char *filter;
 107         const char *orderfile;
 108         const char *pickaxe;
 109         const char *single_follow;
 110         const char *a_prefix, *b_prefix;
 111         unsigned flags;
 112         int use_color;
 113         int context;
 114         int interhunkcontext;
 115         int break_opt;
 116         int detect_rename;
 117         int irreversible_delete;
 118         int skip_stat_unmatch;
 119         int line_termination;
 120         int output_format;
 121         int pickaxe_opts;
 122         int rename_score;
 123         int rename_limit;
 124         int needed_rename_limit;
 125         int degraded_cc_to_c;
 126         int show_rename_progress;
 127         int dirstat_permille;
 128         int setup;
 129         int abbrev;
 130         const char *prefix;
 131         int prefix_length;
 132         const char *stat_sep;
 133         long xdl_opts;
 134
 135         int stat_width;
 136         int stat_name_width;
 137         int stat_graph_width;
 138         int stat_count;
 139         const char *word_regex;
 140         enum diff_words_type word_diff;
 141
 142         /* this is set by diffcore for DIFF_FORMAT_PATCH */
 143         int found_changes;
 144
 145         /* to support internal diff recursion by --follow hack*/
 146         int found_follow;
 147
 148         FILE *file;
 149         int close_file;
 150
 151         struct pathspec pathspec;
 152         change_fn_t change;
 153         add_remove_fn_t add_remove;
 154         diff_format_fn_t format_callback;
 155         void *format_callback_data;
 156         diff_prefix_fn_t output_prefix;
 157         int output_prefix_length;
 158         void *output_prefix_data;
 159 };
 160
 161 enum color_diff {
 162         DIFF_RESET = 0,
 163         DIFF_PLAIN = 1,
 164         DIFF_METAINFO = 2,
 165         DIFF_FRAGINFO = 3,
 166         DIFF_FILE_OLD = 4,
 167         DIFF_FILE_NEW = 5,
 168         DIFF_COMMIT = 6,
 169         DIFF_WHITESPACE = 7,
 170         DIFF_FUNCINFO = 8
 171 };
 172 const char *diff_get_color(int diff_use_color, enum color_diff ix);
 173 #define diff_get_color_opt(o, ix) \
 174         diff_get_color((o)->use_color, ix)
 175
 176
 177 const char *diff_line_prefix(struct diff_options *);
 178
 179
 180 extern const char mime_boundary_leader[];
 181
 182 extern void diff_tree_setup_paths(const char **paths, struct diff_options *);
 183 extern void diff_tree_release_paths(struct diff_options *);
 184 extern int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
 185                      const char *base, struct diff_options *opt);
 186 extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
 187                           const char *base, struct diff_options *opt);
 188 extern int diff_root_tree_sha1(const unsigned char *new, const char *base,
 189                                struct diff_options *opt);
 190
 191 struct combine_diff_path {
 192         struct combine_diff_path *next;
 193         int len;
 194         char *path;
 195         unsigned int mode;
 196         unsigned char sha1[20];
 197         struct combine_diff_parent {
 198                 char status;
 199                 unsigned int mode;
 200                 unsigned char sha1[20];
 201         } parent[FLEX_ARRAY];
 202 };
 203 #define combine_diff_path_size(n, l) \
 204         (sizeof(struct combine_diff_path) + \
 205          sizeof(struct combine_diff_parent) * (n) + (l) + 1)
 206
 207 extern void show_combined_diff(struct combine_diff_path *elem, int num_parent,
 208                               int dense, struct rev_info *);
 209
 210 extern void diff_tree_combined(const unsigned char *sha1, const struct sha1_array *parents, int dense, struct rev_info *rev);
 211
 212 extern void diff_tree_combined_merge(const struct commit *commit, int dense, struct rev_info *rev);
 213
 214 void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b);
 215
 216 extern int diff_can_quit_early(struct diff_options *);
 217
 218 extern void diff_addremove(struct diff_options *,
 219                            int addremove,
 220                            unsigned mode,
 221                            const unsigned char *sha1,
 222                            int sha1_valid,
 223                            const char *fullpath, unsigned dirty_submodule);
 224
 225 extern void diff_change(struct diff_options *,
 226                         unsigned mode1, unsigned mode2,
 227                         const unsigned char *sha1,
 228                         const unsigned char *sha2,
 229                         int sha1_valid,
 230                         int sha2_valid,
 231                         const char *fullpath,
 232                         unsigned dirty_submodule1, unsigned dirty_submodule2);
 233
 234 extern struct diff_filepair *diff_unmerge(struct diff_options *, const char *path);
 235
 236 #define DIFF_SETUP_REVERSE              1
 237 #define DIFF_SETUP_USE_CACHE            2
 238 #define DIFF_SETUP_USE_SIZE_CACHE       4
 239
 240 /*
 241  * Poor man's alternative to parse-option, to allow both sticked form
 242  * (--option=value) and separate form (--option value).
 243  */
 244 extern int parse_long_opt(const char *opt, const char **argv,
 245                          const char **optarg);
 246
 247 extern int git_diff_basic_config(const char *var, const char *value, void *cb);
 248 extern int git_diff_ui_config(const char *var, const char *value, void *cb);
 249 extern void diff_setup(struct diff_options *);
 250 extern int diff_opt_parse(struct diff_options *, const char **, int);
 251 extern void diff_setup_done(struct diff_options *);
 252
 253 #define DIFF_DETECT_RENAME      1
 254 #define DIFF_DETECT_COPY        2
 255
 256 #define DIFF_PICKAXE_ALL        1
 257 #define DIFF_PICKAXE_REGEX      2
 258
 259 #define DIFF_PICKAXE_KIND_S     4 /* traditional plumbing counter */
 260 #define DIFF_PICKAXE_KIND_G     8 /* grep in the patch */
 261
 262 extern void diffcore_std(struct diff_options *);
 263 extern void diffcore_fix_diff_index(struct diff_options *);
 264
 265 #define COMMON_DIFF_OPTIONS_HELP \
 266 "\ncommon diff options:\n" \
 267 "  -z            output diff-raw with lines terminated with NUL.\n" \
 268 "  -p            output patch format.\n" \
 269 "  -u            synonym for -p.\n" \
 270 "  --patch-with-raw\n" \
 271 "                output both a patch and the diff-raw format.\n" \
 272 "  --stat        show diffstat instead of patch.\n" \
 273 "  --numstat     show numeric diffstat instead of patch.\n" \
 274 "  --patch-with-stat\n" \
 275 "                output a patch and prepend its diffstat.\n" \
 276 "  --name-only   show only names of changed files.\n" \
 277 "  --name-status show names and status of changed files.\n" \
 278 "  --full-index  show full object name on index lines.\n" \
 279 "  --abbrev=<n>  abbreviate object names in diff-tree header and diff-raw.\n" \
 280 "  -R            swap input file pairs.\n" \
 281 "  -B            detect complete rewrites.\n" \
 282 "  -M            detect renames.\n" \
 283 "  -C            detect copies.\n" \
 284 "  --find-copies-harder\n" \
 285 "                try unchanged files as candidate for copy detection.\n" \
 286 "  -l<n>         limit rename attempts up to <n> paths.\n" \
 287 "  -O<file>      reorder diffs according to the <file>.\n" \
 288 "  -S<string>    find filepair whose only one side contains the string.\n" \
 289 "  --pickaxe-all\n" \
 290 "                show all files diff when -S is used and hit is found.\n" \
 291 "  -a  --text    treat all files as text.\n"
 292
 293 extern int diff_queue_is_empty(void);
 294 extern void diff_flush(struct diff_options*);
 295 extern void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc);
 296
 297 /* diff-raw status letters */
 298 #define DIFF_STATUS_ADDED               'A'
 299 #define DIFF_STATUS_COPIED              'C'
 300 #define DIFF_STATUS_DELETED             'D'
 301 #define DIFF_STATUS_MODIFIED            'M'
 302 #define DIFF_STATUS_RENAMED             'R'
 303 #define DIFF_STATUS_TYPE_CHANGED        'T'
 304 #define DIFF_STATUS_UNKNOWN             'X'
 305 #define DIFF_STATUS_UNMERGED            'U'
 306
 307 /* these are not diff-raw status letters proper, but used by
 308  * diffcore-filter insn to specify additional restrictions.
 309  */
 310 #define DIFF_STATUS_FILTER_AON          '*'
 311 #define DIFF_STATUS_FILTER_BROKEN       'B'
 312
 313 extern const char *diff_unique_abbrev(const unsigned char *, int);
 314
 315 /* do not report anything on removed paths */
 316 #define DIFF_SILENT_ON_REMOVED 01
 317 /* report racily-clean paths as modified */
 318 #define DIFF_RACY_IS_MODIFIED 02
 319 extern int run_diff_files(struct rev_info *revs, unsigned int option);
 320 extern int run_diff_index(struct rev_info *revs, int cached);
 321
 322 extern int do_diff_cache(const unsigned char *, struct diff_options *);
 323 extern int diff_flush_patch_id(struct diff_options *, unsigned char *);
 324
 325 extern int diff_result_code(struct diff_options *, int);
 326
 327 extern void diff_no_index(struct rev_info *, int, const char **, int, const char *);
 328
 329 extern int index_differs_from(const char *def, int diff_flags);
 330
 331 extern size_t fill_textconv(struct userdiff_driver *driver,
 332                             struct diff_filespec *df,
 333                             char **outbuf);
 334
 335 extern struct userdiff_driver *get_textconv(struct diff_filespec *one);
 336
 337 extern int parse_rename_score(const char **cp_p);
 338
 339 extern long parse_algorithm_value(const char *value);
 340
 341 extern int print_stat_summary(FILE *fp, int files,
 342                               int insertions, int deletions);
 343 extern void setup_diff_pager(struct diff_options *);
 344
 345 #endif /* DIFF_H */