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
   9struct rev_info;
  10struct diff_options;
  11struct diff_queue_struct;
  12struct strbuf;
  13struct diff_filespec;
  14struct userdiff_driver;
  15
  16typedef void (*change_fn_t)(struct diff_options *options,
  17                 unsigned old_mode, unsigned new_mode,
  18                 const unsigned char *old_sha1,
  19                 const unsigned char *new_sha1,
  20                 const char *fullpath,
  21                 unsigned old_dirty_submodule, unsigned new_dirty_submodule);
  22
  23typedef void (*add_remove_fn_t)(struct diff_options *options,
  24                    int addremove, unsigned mode,
  25                    const unsigned char *sha1,
  26                    const char *fullpath, unsigned dirty_submodule);
  27
  28typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
  29                struct diff_options *options, void *data);
  30
  31typedef struct strbuf *(*diff_prefix_fn_t)(struct diff_options *opt, void *data);
  32
  33#define DIFF_FORMAT_RAW         0x0001
  34#define DIFF_FORMAT_DIFFSTAT    0x0002
  35#define DIFF_FORMAT_NUMSTAT     0x0004
  36#define DIFF_FORMAT_SUMMARY     0x0008
  37#define DIFF_FORMAT_PATCH       0x0010
  38#define DIFF_FORMAT_SHORTSTAT   0x0020
  39#define DIFF_FORMAT_DIRSTAT     0x0040
  40
  41/* These override all above */
  42#define DIFF_FORMAT_NAME        0x0100
  43#define DIFF_FORMAT_NAME_STATUS 0x0200
  44#define DIFF_FORMAT_CHECKDIFF   0x0400
  45
  46/* Same as output_format = 0 but we know that -s flag was given
  47 * and we should not give default value to output_format.
  48 */
  49#define DIFF_FORMAT_NO_OUTPUT   0x0800
  50
  51#define DIFF_FORMAT_CALLBACK    0x1000
  52
  53#define DIFF_OPT_RECURSIVE           (1 <<  0)
  54#define DIFF_OPT_TREE_IN_RECURSIVE   (1 <<  1)
  55#define DIFF_OPT_BINARY              (1 <<  2)
  56#define DIFF_OPT_TEXT                (1 <<  3)
  57#define DIFF_OPT_FULL_INDEX          (1 <<  4)
  58#define DIFF_OPT_SILENT_ON_REMOVE    (1 <<  5)
  59#define DIFF_OPT_FIND_COPIES_HARDER  (1 <<  6)
  60#define DIFF_OPT_FOLLOW_RENAMES      (1 <<  7)
  61/* (1 <<  8) unused */
  62/* (1 <<  9) unused */
  63#define DIFF_OPT_HAS_CHANGES         (1 << 10)
  64#define DIFF_OPT_QUICK               (1 << 11)
  65#define DIFF_OPT_NO_INDEX            (1 << 12)
  66#define DIFF_OPT_ALLOW_EXTERNAL      (1 << 13)
  67#define DIFF_OPT_EXIT_WITH_STATUS    (1 << 14)
  68#define DIFF_OPT_REVERSE_DIFF        (1 << 15)
  69#define DIFF_OPT_CHECK_FAILED        (1 << 16)
  70#define DIFF_OPT_RELATIVE_NAME       (1 << 17)
  71#define DIFF_OPT_IGNORE_SUBMODULES   (1 << 18)
  72#define DIFF_OPT_DIRSTAT_CUMULATIVE  (1 << 19)
  73#define DIFF_OPT_DIRSTAT_BY_FILE     (1 << 20)
  74#define DIFF_OPT_ALLOW_TEXTCONV      (1 << 21)
  75#define DIFF_OPT_DIFF_FROM_CONTENTS  (1 << 22)
  76#define DIFF_OPT_SUBMODULE_LOG       (1 << 23)
  77#define DIFF_OPT_DIRTY_SUBMODULES    (1 << 24)
  78#define DIFF_OPT_IGNORE_UNTRACKED_IN_SUBMODULES (1 << 25)
  79#define DIFF_OPT_IGNORE_DIRTY_SUBMODULES (1 << 26)
  80#define DIFF_OPT_OVERRIDE_SUBMODULE_CONFIG (1 << 27)
  81#define DIFF_OPT_DIRSTAT_BY_LINE     (1 << 28)
  82
  83#define DIFF_OPT_TST(opts, flag)    ((opts)->flags & DIFF_OPT_##flag)
  84#define DIFF_OPT_SET(opts, flag)    ((opts)->flags |= DIFF_OPT_##flag)
  85#define DIFF_OPT_CLR(opts, flag)    ((opts)->flags &= ~DIFF_OPT_##flag)
  86#define DIFF_XDL_TST(opts, flag)    ((opts)->xdl_opts & XDF_##flag)
  87#define DIFF_XDL_SET(opts, flag)    ((opts)->xdl_opts |= XDF_##flag)
  88#define DIFF_XDL_CLR(opts, flag)    ((opts)->xdl_opts &= ~XDF_##flag)
  89
  90enum diff_words_type {
  91        DIFF_WORDS_NONE = 0,
  92        DIFF_WORDS_PORCELAIN,
  93        DIFF_WORDS_PLAIN,
  94        DIFF_WORDS_COLOR
  95};
  96
  97struct diff_options {
  98        const char *filter;
  99        const char *orderfile;
 100        const char *pickaxe;
 101        const char *single_follow;
 102        const char *a_prefix, *b_prefix;
 103        unsigned flags;
 104        int use_color;
 105        int context;
 106        int interhunkcontext;
 107        int break_opt;
 108        int detect_rename;
 109        int irreversible_delete;
 110        int skip_stat_unmatch;
 111        int line_termination;
 112        int output_format;
 113        int pickaxe_opts;
 114        int rename_score;
 115        int rename_limit;
 116        int needed_rename_limit;
 117        int degraded_cc_to_c;
 118        int show_rename_progress;
 119        int dirstat_permille;
 120        int setup;
 121        int abbrev;
 122        const char *prefix;
 123        int prefix_length;
 124        const char *stat_sep;
 125        long xdl_opts;
 126
 127        int stat_width;
 128        int stat_name_width;
 129        int stat_count;
 130        const char *word_regex;
 131        enum diff_words_type word_diff;
 132
 133        /* this is set by diffcore for DIFF_FORMAT_PATCH */
 134        int found_changes;
 135
 136        /* to support internal diff recursion by --follow hack*/
 137        int found_follow;
 138
 139        FILE *file;
 140        int close_file;
 141
 142        struct pathspec pathspec;
 143        change_fn_t change;
 144        add_remove_fn_t add_remove;
 145        diff_format_fn_t format_callback;
 146        void *format_callback_data;
 147        diff_prefix_fn_t output_prefix;
 148        void *output_prefix_data;
 149};
 150
 151enum color_diff {
 152        DIFF_RESET = 0,
 153        DIFF_PLAIN = 1,
 154        DIFF_METAINFO = 2,
 155        DIFF_FRAGINFO = 3,
 156        DIFF_FILE_OLD = 4,
 157        DIFF_FILE_NEW = 5,
 158        DIFF_COMMIT = 6,
 159        DIFF_WHITESPACE = 7,
 160        DIFF_FUNCINFO = 8
 161};
 162const char *diff_get_color(int diff_use_color, enum color_diff ix);
 163#define diff_get_color_opt(o, ix) \
 164        diff_get_color((o)->use_color, ix)
 165
 166
 167extern const char mime_boundary_leader[];
 168
 169extern void diff_tree_setup_paths(const char **paths, struct diff_options *);
 170extern void diff_tree_release_paths(struct diff_options *);
 171extern int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
 172                     const char *base, struct diff_options *opt);
 173extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
 174                          const char *base, struct diff_options *opt);
 175extern int diff_root_tree_sha1(const unsigned char *new, const char *base,
 176                               struct diff_options *opt);
 177
 178struct combine_diff_path {
 179        struct combine_diff_path *next;
 180        int len;
 181        char *path;
 182        unsigned int mode;
 183        unsigned char sha1[20];
 184        struct combine_diff_parent {
 185                char status;
 186                unsigned int mode;
 187                unsigned char sha1[20];
 188        } parent[FLEX_ARRAY];
 189};
 190#define combine_diff_path_size(n, l) \
 191        (sizeof(struct combine_diff_path) + \
 192         sizeof(struct combine_diff_parent) * (n) + (l) + 1)
 193
 194extern void show_combined_diff(struct combine_diff_path *elem, int num_parent,
 195                              int dense, struct rev_info *);
 196
 197extern void diff_tree_combined(const unsigned char *sha1, const unsigned char parent[][20], int num_parent, int dense, struct rev_info *rev);
 198
 199extern void diff_tree_combined_merge(const unsigned char *sha1, int, struct rev_info *);
 200
 201void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b);
 202
 203extern int diff_can_quit_early(struct diff_options *);
 204
 205extern void diff_addremove(struct diff_options *,
 206                           int addremove,
 207                           unsigned mode,
 208                           const unsigned char *sha1,
 209                           const char *fullpath, unsigned dirty_submodule);
 210
 211extern void diff_change(struct diff_options *,
 212                        unsigned mode1, unsigned mode2,
 213                        const unsigned char *sha1,
 214                        const unsigned char *sha2,
 215                        const char *fullpath,
 216                        unsigned dirty_submodule1, unsigned dirty_submodule2);
 217
 218extern struct diff_filepair *diff_unmerge(struct diff_options *, const char *path);
 219
 220#define DIFF_SETUP_REVERSE              1
 221#define DIFF_SETUP_USE_CACHE            2
 222#define DIFF_SETUP_USE_SIZE_CACHE       4
 223
 224/*
 225 * Poor man's alternative to parse-option, to allow both sticked form
 226 * (--option=value) and separate form (--option value).
 227 */
 228extern int parse_long_opt(const char *opt, const char **argv,
 229                         const char **optarg);
 230
 231extern int git_diff_basic_config(const char *var, const char *value, void *cb);
 232extern int git_diff_ui_config(const char *var, const char *value, void *cb);
 233extern int diff_use_color_default;
 234extern void diff_setup(struct diff_options *);
 235extern int diff_opt_parse(struct diff_options *, const char **, int);
 236extern int diff_setup_done(struct diff_options *);
 237
 238#define DIFF_DETECT_RENAME      1
 239#define DIFF_DETECT_COPY        2
 240
 241#define DIFF_PICKAXE_ALL        1
 242#define DIFF_PICKAXE_REGEX      2
 243
 244#define DIFF_PICKAXE_KIND_S     4 /* traditional plumbing counter */
 245#define DIFF_PICKAXE_KIND_G     8 /* grep in the patch */
 246
 247extern void diffcore_std(struct diff_options *);
 248extern void diffcore_fix_diff_index(struct diff_options *);
 249
 250#define COMMON_DIFF_OPTIONS_HELP \
 251"\ncommon diff options:\n" \
 252"  -z            output diff-raw with lines terminated with NUL.\n" \
 253"  -p            output patch format.\n" \
 254"  -u            synonym for -p.\n" \
 255"  --patch-with-raw\n" \
 256"                output both a patch and the diff-raw format.\n" \
 257"  --stat        show diffstat instead of patch.\n" \
 258"  --numstat     show numeric diffstat instead of patch.\n" \
 259"  --patch-with-stat\n" \
 260"                output a patch and prepend its diffstat.\n" \
 261"  --name-only   show only names of changed files.\n" \
 262"  --name-status show names and status of changed files.\n" \
 263"  --full-index  show full object name on index lines.\n" \
 264"  --abbrev=<n>  abbreviate object names in diff-tree header and diff-raw.\n" \
 265"  -R            swap input file pairs.\n" \
 266"  -B            detect complete rewrites.\n" \
 267"  -M            detect renames.\n" \
 268"  -C            detect copies.\n" \
 269"  --find-copies-harder\n" \
 270"                try unchanged files as candidate for copy detection.\n" \
 271"  -l<n>         limit rename attempts up to <n> paths.\n" \
 272"  -O<file>      reorder diffs according to the <file>.\n" \
 273"  -S<string>    find filepair whose only one side contains the string.\n" \
 274"  --pickaxe-all\n" \
 275"                show all files diff when -S is used and hit is found.\n" \
 276"  -a  --text    treat all files as text.\n"
 277
 278extern int diff_queue_is_empty(void);
 279extern void diff_flush(struct diff_options*);
 280extern void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc);
 281
 282/* diff-raw status letters */
 283#define DIFF_STATUS_ADDED               'A'
 284#define DIFF_STATUS_COPIED              'C'
 285#define DIFF_STATUS_DELETED             'D'
 286#define DIFF_STATUS_MODIFIED            'M'
 287#define DIFF_STATUS_RENAMED             'R'
 288#define DIFF_STATUS_TYPE_CHANGED        'T'
 289#define DIFF_STATUS_UNKNOWN             'X'
 290#define DIFF_STATUS_UNMERGED            'U'
 291
 292/* these are not diff-raw status letters proper, but used by
 293 * diffcore-filter insn to specify additional restrictions.
 294 */
 295#define DIFF_STATUS_FILTER_AON          '*'
 296#define DIFF_STATUS_FILTER_BROKEN       'B'
 297
 298extern const char *diff_unique_abbrev(const unsigned char *, int);
 299
 300/* do not report anything on removed paths */
 301#define DIFF_SILENT_ON_REMOVED 01
 302/* report racily-clean paths as modified */
 303#define DIFF_RACY_IS_MODIFIED 02
 304extern int run_diff_files(struct rev_info *revs, unsigned int option);
 305extern int run_diff_index(struct rev_info *revs, int cached);
 306
 307extern int do_diff_cache(const unsigned char *, struct diff_options *);
 308extern int diff_flush_patch_id(struct diff_options *, unsigned char *);
 309
 310extern int diff_result_code(struct diff_options *, int);
 311
 312extern void diff_no_index(struct rev_info *, int, const char **, int, const char *);
 313
 314extern int index_differs_from(const char *def, int diff_flags);
 315
 316extern size_t fill_textconv(struct userdiff_driver *driver,
 317                            struct diff_filespec *df,
 318                            char **outbuf);
 319
 320extern struct userdiff_driver *get_textconv(struct diff_filespec *one);
 321
 322extern int parse_rename_score(const char **cp_p);
 323
 324#endif /* DIFF_H */