Andrew's git - gitweb.git/blob

   1/*
   2 * Copyright (C) 2005 Junio C Hamano
   3 */
   4#ifndef DIFF_H
   5#define DIFF_H
   6
   7#include "tree-walk.h"
   8#include "pathspec.h"
   9
  10struct rev_info;
  11struct diff_options;
  12struct diff_queue_struct;
  13struct strbuf;
  14struct diff_filespec;
  15struct userdiff_driver;
  16struct sha1_array;
  17struct commit;
  18struct combine_diff_path;
  19
  20typedef int (*pathchange_fn_t)(struct diff_options *options,
  21                 struct combine_diff_path *path);
  22
  23typedef void (*change_fn_t)(struct diff_options *options,
  24                 unsigned old_mode, unsigned new_mode,
  25                 const unsigned char *old_sha1,
  26                 const unsigned char *new_sha1,
  27                 int old_sha1_valid, int new_sha1_valid,
  28                 const char *fullpath,
  29                 unsigned old_dirty_submodule, unsigned new_dirty_submodule);
  30
  31typedef void (*add_remove_fn_t)(struct diff_options *options,
  32                    int addremove, unsigned mode,
  33                    const unsigned char *sha1,
  34                    int sha1_valid,
  35                    const char *fullpath, unsigned dirty_submodule);
  36
  37typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
  38                struct diff_options *options, void *data);
  39
  40typedef struct strbuf *(*diff_prefix_fn_t)(struct diff_options *opt, void *data);
  41
  42#define DIFF_FORMAT_RAW         0x0001
  43#define DIFF_FORMAT_DIFFSTAT    0x0002
  44#define DIFF_FORMAT_NUMSTAT     0x0004
  45#define DIFF_FORMAT_SUMMARY     0x0008
  46#define DIFF_FORMAT_PATCH       0x0010
  47#define DIFF_FORMAT_SHORTSTAT   0x0020
  48#define DIFF_FORMAT_DIRSTAT     0x0040
  49
  50/* These override all above */
  51#define DIFF_FORMAT_NAME        0x0100
  52#define DIFF_FORMAT_NAME_STATUS 0x0200
  53#define DIFF_FORMAT_CHECKDIFF   0x0400
  54
  55/* Same as output_format = 0 but we know that -s flag was given
  56 * and we should not give default value to output_format.
  57 */
  58#define DIFF_FORMAT_NO_OUTPUT   0x0800
  59
  60#define DIFF_FORMAT_CALLBACK    0x1000
  61
  62#define DIFF_OPT_RECURSIVE           (1 <<  0)
  63#define DIFF_OPT_TREE_IN_RECURSIVE   (1 <<  1)
  64#define DIFF_OPT_BINARY              (1 <<  2)
  65#define DIFF_OPT_TEXT                (1 <<  3)
  66#define DIFF_OPT_FULL_INDEX          (1 <<  4)
  67#define DIFF_OPT_SILENT_ON_REMOVE    (1 <<  5)
  68#define DIFF_OPT_FIND_COPIES_HARDER  (1 <<  6)
  69#define DIFF_OPT_FOLLOW_RENAMES      (1 <<  7)
  70#define DIFF_OPT_RENAME_EMPTY        (1 <<  8)
  71/* (1 <<  9) unused */
  72#define DIFF_OPT_HAS_CHANGES         (1 << 10)
  73#define DIFF_OPT_QUICK               (1 << 11)
  74#define DIFF_OPT_NO_INDEX            (1 << 12)
  75#define DIFF_OPT_ALLOW_EXTERNAL      (1 << 13)
  76#define DIFF_OPT_EXIT_WITH_STATUS    (1 << 14)
  77#define DIFF_OPT_REVERSE_DIFF        (1 << 15)
  78#define DIFF_OPT_CHECK_FAILED        (1 << 16)
  79#define DIFF_OPT_RELATIVE_NAME       (1 << 17)
  80#define DIFF_OPT_IGNORE_SUBMODULES   (1 << 18)
  81#define DIFF_OPT_DIRSTAT_CUMULATIVE  (1 << 19)
  82#define DIFF_OPT_DIRSTAT_BY_FILE     (1 << 20)
  83#define DIFF_OPT_ALLOW_TEXTCONV      (1 << 21)
  84#define DIFF_OPT_DIFF_FROM_CONTENTS  (1 << 22)
  85#define DIFF_OPT_SUBMODULE_LOG       (1 << 23)
  86#define DIFF_OPT_DIRTY_SUBMODULES    (1 << 24)
  87#define DIFF_OPT_IGNORE_UNTRACKED_IN_SUBMODULES (1 << 25)
  88#define DIFF_OPT_IGNORE_DIRTY_SUBMODULES (1 << 26)
  89#define DIFF_OPT_OVERRIDE_SUBMODULE_CONFIG (1 << 27)
  90#define DIFF_OPT_DIRSTAT_BY_LINE     (1 << 28)
  91#define DIFF_OPT_FUNCCONTEXT         (1 << 29)
  92#define DIFF_OPT_PICKAXE_IGNORE_CASE (1 << 30)
  93
  94#define DIFF_OPT_TST(opts, flag)    ((opts)->flags & DIFF_OPT_##flag)
  95#define DIFF_OPT_TOUCHED(opts, flag)    ((opts)->touched_flags & DIFF_OPT_##flag)
  96#define DIFF_OPT_SET(opts, flag)    (((opts)->flags |= DIFF_OPT_##flag),((opts)->touched_flags |= DIFF_OPT_##flag))
  97#define DIFF_OPT_CLR(opts, flag)    (((opts)->flags &= ~DIFF_OPT_##flag),((opts)->touched_flags |= DIFF_OPT_##flag))
  98#define DIFF_XDL_TST(opts, flag)    ((opts)->xdl_opts & XDF_##flag)
  99#define DIFF_XDL_SET(opts, flag)    ((opts)->xdl_opts |= XDF_##flag)
 100#define DIFF_XDL_CLR(opts, flag)    ((opts)->xdl_opts &= ~XDF_##flag)
 101
 102#define DIFF_WITH_ALG(opts, flag)   (((opts)->xdl_opts & ~XDF_DIFF_ALGORITHM_MASK) | XDF_##flag)
 103
 104enum diff_words_type {
 105        DIFF_WORDS_NONE = 0,
 106        DIFF_WORDS_PORCELAIN,
 107        DIFF_WORDS_PLAIN,
 108        DIFF_WORDS_COLOR
 109};
 110
 111struct diff_options {
 112        const char *orderfile;
 113        const char *pickaxe;
 114        const char *single_follow;
 115        const char *a_prefix, *b_prefix;
 116        unsigned flags;
 117        unsigned touched_flags;
 118
 119        /* diff-filter bits */
 120        unsigned int filter;
 121
 122        int use_color;
 123        int context;
 124        int interhunkcontext;
 125        int break_opt;
 126        int detect_rename;
 127        int irreversible_delete;
 128        int skip_stat_unmatch;
 129        int line_termination;
 130        int output_format;
 131        int pickaxe_opts;
 132        int rename_score;
 133        int rename_limit;
 134        int needed_rename_limit;
 135        int degraded_cc_to_c;
 136        int show_rename_progress;
 137        int dirstat_permille;
 138        int setup;
 139        int abbrev;
 140        const char *prefix;
 141        int prefix_length;
 142        const char *stat_sep;
 143        long xdl_opts;
 144
 145        int stat_width;
 146        int stat_name_width;
 147        int stat_graph_width;
 148        int stat_count;
 149        const char *word_regex;
 150        enum diff_words_type word_diff;
 151
 152        /* this is set by diffcore for DIFF_FORMAT_PATCH */
 153        int found_changes;
 154
 155        /* to support internal diff recursion by --follow hack*/
 156        int found_follow;
 157
 158        void (*set_default)(struct diff_options *);
 159
 160        FILE *file;
 161        int close_file;
 162
 163        struct pathspec pathspec;
 164        pathchange_fn_t pathchange;
 165        change_fn_t change;
 166        add_remove_fn_t add_remove;
 167        diff_format_fn_t format_callback;
 168        void *format_callback_data;
 169        diff_prefix_fn_t output_prefix;
 170        int output_prefix_length;
 171        void *output_prefix_data;
 172
 173        int diff_path_counter;
 174};
 175
 176enum color_diff {
 177        DIFF_RESET = 0,
 178        DIFF_CONTEXT = 1,
 179        DIFF_METAINFO = 2,
 180        DIFF_FRAGINFO = 3,
 181        DIFF_FILE_OLD = 4,
 182        DIFF_FILE_NEW = 5,
 183        DIFF_COMMIT = 6,
 184        DIFF_WHITESPACE = 7,
 185        DIFF_FUNCINFO = 8
 186};
 187const char *diff_get_color(int diff_use_color, enum color_diff ix);
 188#define diff_get_color_opt(o, ix) \
 189        diff_get_color((o)->use_color, ix)
 190
 191
 192const char *diff_line_prefix(struct diff_options *);
 193
 194
 195extern const char mime_boundary_leader[];
 196
 197extern struct combine_diff_path *diff_tree_paths(
 198        struct combine_diff_path *p, const unsigned char *sha1,
 199        const unsigned char **parent_sha1, int nparent,
 200        struct strbuf *base, struct diff_options *opt);
 201extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
 202                          const char *base, struct diff_options *opt);
 203extern int diff_root_tree_sha1(const unsigned char *new, const char *base,
 204                               struct diff_options *opt);
 205
 206struct combine_diff_path {
 207        struct combine_diff_path *next;
 208        char *path;
 209        unsigned int mode;
 210        unsigned char sha1[20];
 211        struct combine_diff_parent {
 212                char status;
 213                unsigned int mode;
 214                unsigned char sha1[20];
 215        } parent[FLEX_ARRAY];
 216};
 217#define combine_diff_path_size(n, l) \
 218        (sizeof(struct combine_diff_path) + \
 219         sizeof(struct combine_diff_parent) * (n) + (l) + 1)
 220
 221extern void show_combined_diff(struct combine_diff_path *elem, int num_parent,
 222                              int dense, struct rev_info *);
 223
 224extern void diff_tree_combined(const unsigned char *sha1, const struct sha1_array *parents, int dense, struct rev_info *rev);
 225
 226extern void diff_tree_combined_merge(const struct commit *commit, int dense, struct rev_info *rev);
 227
 228void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b);
 229
 230extern int diff_can_quit_early(struct diff_options *);
 231
 232extern void diff_addremove(struct diff_options *,
 233                           int addremove,
 234                           unsigned mode,
 235                           const unsigned char *sha1,
 236                           int sha1_valid,
 237                           const char *fullpath, unsigned dirty_submodule);
 238
 239extern void diff_change(struct diff_options *,
 240                        unsigned mode1, unsigned mode2,
 241                        const unsigned char *sha1,
 242                        const unsigned char *sha2,
 243                        int sha1_valid,
 244                        int sha2_valid,
 245                        const char *fullpath,
 246                        unsigned dirty_submodule1, unsigned dirty_submodule2);
 247
 248extern struct diff_filepair *diff_unmerge(struct diff_options *, const char *path);
 249
 250#define DIFF_SETUP_REVERSE              1
 251#define DIFF_SETUP_USE_CACHE            2
 252#define DIFF_SETUP_USE_SIZE_CACHE       4
 253
 254/*
 255 * Poor man's alternative to parse-option, to allow both stuck form
 256 * (--option=value) and separate form (--option value).
 257 */
 258extern int parse_long_opt(const char *opt, const char **argv,
 259                         const char **optarg);
 260
 261extern int git_diff_basic_config(const char *var, const char *value, void *cb);
 262extern int git_diff_ui_config(const char *var, const char *value, void *cb);
 263extern void diff_setup(struct diff_options *);
 264extern int diff_opt_parse(struct diff_options *, const char **, int);
 265extern void diff_setup_done(struct diff_options *);
 266
 267#define DIFF_DETECT_RENAME      1
 268#define DIFF_DETECT_COPY        2
 269
 270#define DIFF_PICKAXE_ALL        1
 271#define DIFF_PICKAXE_REGEX      2
 272
 273#define DIFF_PICKAXE_KIND_S     4 /* traditional plumbing counter */
 274#define DIFF_PICKAXE_KIND_G     8 /* grep in the patch */
 275
 276extern void diffcore_std(struct diff_options *);
 277extern void diffcore_fix_diff_index(struct diff_options *);
 278
 279#define COMMON_DIFF_OPTIONS_HELP \
 280"\ncommon diff options:\n" \
 281"  -z            output diff-raw with lines terminated with NUL.\n" \
 282"  -p            output patch format.\n" \
 283"  -u            synonym for -p.\n" \
 284"  --patch-with-raw\n" \
 285"                output both a patch and the diff-raw format.\n" \
 286"  --stat        show diffstat instead of patch.\n" \
 287"  --numstat     show numeric diffstat instead of patch.\n" \
 288"  --patch-with-stat\n" \
 289"                output a patch and prepend its diffstat.\n" \
 290"  --name-only   show only names of changed files.\n" \
 291"  --name-status show names and status of changed files.\n" \
 292"  --full-index  show full object name on index lines.\n" \
 293"  --abbrev=<n>  abbreviate object names in diff-tree header and diff-raw.\n" \
 294"  -R            swap input file pairs.\n" \
 295"  -B            detect complete rewrites.\n" \
 296"  -M            detect renames.\n" \
 297"  -C            detect copies.\n" \
 298"  --find-copies-harder\n" \
 299"                try unchanged files as candidate for copy detection.\n" \
 300"  -l<n>         limit rename attempts up to <n> paths.\n" \
 301"  -O<file>      reorder diffs according to the <file>.\n" \
 302"  -S<string>    find filepair whose only one side contains the string.\n" \
 303"  --pickaxe-all\n" \
 304"                show all files diff when -S is used and hit is found.\n" \
 305"  -a  --text    treat all files as text.\n"
 306
 307extern int diff_queue_is_empty(void);
 308extern void diff_flush(struct diff_options*);
 309extern void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc);
 310
 311/* diff-raw status letters */
 312#define DIFF_STATUS_ADDED               'A'
 313#define DIFF_STATUS_COPIED              'C'
 314#define DIFF_STATUS_DELETED             'D'
 315#define DIFF_STATUS_MODIFIED            'M'
 316#define DIFF_STATUS_RENAMED             'R'
 317#define DIFF_STATUS_TYPE_CHANGED        'T'
 318#define DIFF_STATUS_UNKNOWN             'X'
 319#define DIFF_STATUS_UNMERGED            'U'
 320
 321/* these are not diff-raw status letters proper, but used by
 322 * diffcore-filter insn to specify additional restrictions.
 323 */
 324#define DIFF_STATUS_FILTER_AON          '*'
 325#define DIFF_STATUS_FILTER_BROKEN       'B'
 326
 327extern const char *diff_unique_abbrev(const unsigned char *, int);
 328
 329/* do not report anything on removed paths */
 330#define DIFF_SILENT_ON_REMOVED 01
 331/* report racily-clean paths as modified */
 332#define DIFF_RACY_IS_MODIFIED 02
 333extern int run_diff_files(struct rev_info *revs, unsigned int option);
 334extern int run_diff_index(struct rev_info *revs, int cached);
 335
 336extern int do_diff_cache(const unsigned char *, struct diff_options *);
 337extern int diff_flush_patch_id(struct diff_options *, unsigned char *);
 338
 339extern int diff_result_code(struct diff_options *, int);
 340
 341extern void diff_no_index(struct rev_info *, int, const char **, const char *);
 342
 343extern int index_differs_from(const char *def, int diff_flags);
 344
 345extern size_t fill_textconv(struct userdiff_driver *driver,
 346                            struct diff_filespec *df,
 347                            char **outbuf);
 348
 349extern struct userdiff_driver *get_textconv(struct diff_filespec *one);
 350
 351extern int parse_rename_score(const char **cp_p);
 352
 353extern long parse_algorithm_value(const char *value);
 354
 355extern int print_stat_summary(FILE *fp, int files,
 356                              int insertions, int deletions);
 357extern void setup_diff_pager(struct diff_options *);
 358
 359#endif /* DIFF_H */