git.h

   1 #ifndef GIT_H
   2 #define GIT_H
   3
   4
   5 /*
   6  * from git:git-compat-util.h
   7  */
   8
   9
  10 #ifndef FLEX_ARRAY
  11 #if defined(__GNUC__) && (__GNUC__ < 3)
  12 #define FLEX_ARRAY 0
  13 #else
  14 #define FLEX_ARRAY /* empty */
  15 #endif
  16 #endif
  17
  18
  19 #include <unistd.h>
  20 #include <stdio.h>
  21 #include <sys/stat.h>
  22 #include <fcntl.h>
  23 #include <stddef.h>
  24 #include <stdlib.h>
  25 #include <stdarg.h>
  26 #include <string.h>
  27 #include <errno.h>
  28 #include <limits.h>
  29 #include <sys/param.h>
  30 #include <netinet/in.h>
  31 #include <sys/types.h>
  32 #include <dirent.h>
  33 #include <time.h>
  34 #include <regex.h>
  35
  36 /* On most systems <limits.h> would have given us this, but
  37  * not on some systems (e.g. GNU/Hurd).
  38  */
  39 #ifndef PATH_MAX
  40 #define PATH_MAX 4096
  41 #endif
  42
  43 #ifdef __GNUC__
  44 #define NORETURN __attribute__((__noreturn__))
  45 #else
  46 #define NORETURN
  47 #ifndef __attribute__
  48 #define __attribute__(x)
  49 #endif
  50 #endif
  51
  52
  53 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
  54
  55
  56 static inline char* xstrdup(const char *str)
  57 {
  58         char *ret = strdup(str);
  59         if (!ret)
  60                 die("Out of memory, strdup failed");
  61         return ret;
  62 }
  63
  64 static inline void *xmalloc(size_t size)
  65 {
  66         void *ret = malloc(size);
  67         if (!ret && !size)
  68                 ret = malloc(1);
  69         if (!ret)
  70                 die("Out of memory, malloc failed");
  71 #ifdef XMALLOC_POISON
  72         memset(ret, 0xA5, size);
  73 #endif
  74         return ret;
  75 }
  76
  77 static inline void *xrealloc(void *ptr, size_t size)
  78 {
  79         void *ret = realloc(ptr, size);
  80         if (!ret && !size)
  81                 ret = realloc(ptr, 1);
  82         if (!ret)
  83                 die("Out of memory, realloc failed");
  84         return ret;
  85 }
  86
  87 static inline void *xcalloc(size_t nmemb, size_t size)
  88 {
  89         void *ret = calloc(nmemb, size);
  90         if (!ret && (!nmemb || !size))
  91                 ret = calloc(1, 1);
  92         if (!ret)
  93                 die("Out of memory, calloc failed");
  94         return ret;
  95 }
  96
  97 static inline ssize_t xread(int fd, void *buf, size_t len)
  98 {
  99         ssize_t nr;
 100         while (1) {
 101                 nr = read(fd, buf, len);
 102                 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 103                         continue;
 104                 return nr;
 105         }
 106 }
 107
 108 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
 109 {
 110         ssize_t nr;
 111         while (1) {
 112                 nr = write(fd, buf, len);
 113                 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
 114                         continue;
 115                 return nr;
 116         }
 117 }
 118
 119
 120
 121
 122 /*
 123  * from git:cache.h
 124  */
 125
 126
 127 enum object_type {
 128         OBJ_NONE = 0,
 129         OBJ_COMMIT = 1,
 130         OBJ_TREE = 2,
 131         OBJ_BLOB = 3,
 132         OBJ_TAG = 4,
 133         /* 5 for future expansion */
 134         OBJ_OFS_DELTA = 6,
 135         OBJ_REF_DELTA = 7,
 136         OBJ_BAD,
 137 };
 138
 139
 140 /* Convert to/from hex/sha1 representation */
 141 #define MINIMUM_ABBREV 4
 142 #define DEFAULT_ABBREV 7
 143
 144 extern const unsigned char null_sha1[20];
 145
 146 extern int sha1_object_info(const unsigned char *, char *, unsigned long *);
 147
 148 extern void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size);
 149
 150 extern int get_sha1(const char *str, unsigned char *sha1);
 151 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 152 extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 153
 154 static inline int is_null_sha1(const unsigned char *sha1)
 155 {
 156         return !memcmp(sha1, null_sha1, 20);
 157 }
 158 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 159 {
 160         return memcmp(sha1, sha2, 20);
 161 }
 162 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 163 {
 164         memcpy(sha_dst, sha_src, 20);
 165 }
 166 static inline void hashclr(unsigned char *hash)
 167 {
 168         memset(hash, 0, 20);
 169 }
 170
 171
 172 /*
 173  * from git:grep.h
 174  */
 175
 176 enum grep_pat_token {
 177         GREP_PATTERN,
 178         GREP_PATTERN_HEAD,
 179         GREP_PATTERN_BODY,
 180         GREP_AND,
 181         GREP_OPEN_PAREN,
 182         GREP_CLOSE_PAREN,
 183         GREP_NOT,
 184         GREP_OR,
 185 };
 186
 187 enum grep_context {
 188         GREP_CONTEXT_HEAD,
 189         GREP_CONTEXT_BODY,
 190 };
 191
 192 struct grep_pat {
 193         struct grep_pat *next;
 194         const char *origin;
 195         int no;
 196         enum grep_pat_token token;
 197         const char *pattern;
 198         regex_t regexp;
 199 };
 200
 201 enum grep_expr_node {
 202         GREP_NODE_ATOM,
 203         GREP_NODE_NOT,
 204         GREP_NODE_AND,
 205         GREP_NODE_OR,
 206 };
 207
 208 struct grep_opt {
 209         struct grep_pat *pattern_list;
 210         struct grep_pat **pattern_tail;
 211         struct grep_expr *pattern_expression;
 212         int prefix_length;
 213         regex_t regexp;
 214         unsigned linenum:1;
 215         unsigned invert:1;
 216         unsigned status_only:1;
 217         unsigned name_only:1;
 218         unsigned unmatch_name_only:1;
 219         unsigned count:1;
 220         unsigned word_regexp:1;
 221         unsigned fixed:1;
 222         unsigned all_match:1;
 223 #define GREP_BINARY_DEFAULT     0
 224 #define GREP_BINARY_NOMATCH     1
 225 #define GREP_BINARY_TEXT        2
 226         unsigned binary:2;
 227         unsigned extended:1;
 228         unsigned relative:1;
 229         unsigned pathname:1;
 230         int regflags;
 231         unsigned pre_context;
 232         unsigned post_context;
 233 };
 234
 235
 236 extern void compile_grep_patterns(struct grep_opt *opt);
 237 extern void free_grep_patterns(struct grep_opt *opt);
 238
 239
 240 /*
 241  * from git:object.h
 242  */
 243
 244 extern const char *type_names[9];
 245
 246 struct object_list {
 247         struct object *item;
 248         struct object_list *next;
 249 };
 250
 251 struct object_refs {
 252         unsigned count;
 253         struct object *base;
 254         struct object *ref[FLEX_ARRAY]; /* more */
 255 };
 256
 257 struct object_array {
 258         unsigned int nr;
 259         unsigned int alloc;
 260         struct object_array_entry {
 261                 struct object *item;
 262                 const char *name;
 263         } *objects;
 264 };
 265
 266 #define TYPE_BITS   3
 267 #define FLAG_BITS  27
 268
 269 /*
 270  * The object type is stored in 3 bits.
 271  */
 272 struct object {
 273         unsigned parsed : 1;
 274         unsigned used : 1;
 275         unsigned type : TYPE_BITS;
 276         unsigned flags : FLAG_BITS;
 277         unsigned char sha1[20];
 278 };
 279
 280
 281 /*
 282  * from git:tree.h
 283  */
 284
 285 struct tree {
 286         struct object object;
 287         void *buffer;
 288         unsigned long size;
 289 };
 290
 291
 292 struct tree *lookup_tree(const unsigned char *sha1);
 293 int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size);
 294 int parse_tree(struct tree *tree);
 295 struct tree *parse_tree_indirect(const unsigned char *sha1);
 296
 297 typedef int (*read_tree_fn_t)(const unsigned char *, const char *, int, const char *, unsigned int, int);
 298
 299 extern int read_tree_recursive(struct tree *tree,
 300                                const char *base, int baselen,
 301                                int stage, const char **match,
 302                                read_tree_fn_t fn);
 303
 304 extern int read_tree(struct tree *tree, int stage, const char **paths);
 305
 306
 307 /* from git:commit.h */
 308
 309 struct commit_list {
 310         struct commit *item;
 311         struct commit_list *next;
 312 };
 313
 314 struct commit {
 315         struct object object;
 316         void *util;
 317         unsigned long date;
 318         struct commit_list *parents;
 319         struct tree *tree;
 320         char *buffer;
 321 };
 322
 323
 324 struct commit *lookup_commit(const unsigned char *sha1);
 325 struct commit *lookup_commit_reference(const unsigned char *sha1);
 326 struct commit *lookup_commit_reference_gently(const unsigned char *sha1,
 327                                               int quiet);
 328
 329 int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size);
 330 int parse_commit(struct commit *item);
 331
 332 struct commit_list * commit_list_insert(struct commit *item, struct commit_list **list_p);
 333 struct commit_list * insert_by_date(struct commit *item, struct commit_list **list);
 334
 335 void free_commit_list(struct commit_list *list);
 336
 337 void sort_by_date(struct commit_list **list);
 338
 339 /* Commit formats */
 340 enum cmit_fmt {
 341         CMIT_FMT_RAW,
 342         CMIT_FMT_MEDIUM,
 343         CMIT_FMT_DEFAULT = CMIT_FMT_MEDIUM,
 344         CMIT_FMT_SHORT,
 345         CMIT_FMT_FULL,
 346         CMIT_FMT_FULLER,
 347         CMIT_FMT_ONELINE,
 348         CMIT_FMT_EMAIL,
 349
 350         CMIT_FMT_UNSPECIFIED,
 351 };
 352
 353 extern unsigned long pretty_print_commit(enum cmit_fmt fmt, const struct commit *, unsigned long len, char *buf, unsigned long space, int abbrev, const char *subject, const char *after_subject, int relative_date);
 354
 355
 356 typedef void (*topo_sort_set_fn_t)(struct commit*, void *data);
 357 typedef void* (*topo_sort_get_fn_t)(struct commit*);
 358
 359
 360
 361 /*
 362  * from git:tag.h
 363  */
 364
 365 extern const char *tag_type;
 366
 367 struct tag {
 368         struct object object;
 369         struct object *tagged;
 370         char *tag;
 371         char *signature; /* not actually implemented */
 372 };
 373
 374 extern struct tag *lookup_tag(const unsigned char *sha1);
 375 extern int parse_tag_buffer(struct tag *item, void *data, unsigned long size);
 376 extern int parse_tag(struct tag *item);
 377 extern struct object *deref_tag(struct object *, const char *, int);
 378
 379
 380 /*
 381  * from git:diffcore.h
 382  */
 383
 384 struct diff_filespec {
 385         unsigned char sha1[20];
 386         char *path;
 387         void *data;
 388         void *cnt_data;
 389         unsigned long size;
 390         int xfrm_flags;          /* for use by the xfrm */
 391         unsigned short mode;     /* file mode */
 392         unsigned sha1_valid : 1; /* if true, use sha1 and trust mode;
 393                                   * if false, use the name and read from
 394                                   * the filesystem.
 395                                   */
 396 #define DIFF_FILE_VALID(spec) (((spec)->mode) != 0)
 397         unsigned should_free : 1; /* data should be free()'ed */
 398         unsigned should_munmap : 1; /* data should be munmap()'ed */
 399 };
 400
 401 struct diff_filepair {
 402         struct diff_filespec *one;
 403         struct diff_filespec *two;
 404         unsigned short int score;
 405         char status; /* M C R N D U (see Documentation/diff-format.txt) */
 406         unsigned source_stays : 1; /* all of R/C are copies */
 407         unsigned broken_pair : 1;
 408         unsigned renamed_pair : 1;
 409 };
 410
 411 #define DIFF_PAIR_UNMERGED(p) \
 412         (!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two))
 413
 414 #define DIFF_PAIR_RENAME(p) ((p)->renamed_pair)
 415
 416 #define DIFF_PAIR_BROKEN(p) \
 417         ( (!DIFF_FILE_VALID((p)->one) != !DIFF_FILE_VALID((p)->two)) && \
 418           ((p)->broken_pair != 0) )
 419
 420 #define DIFF_PAIR_TYPE_CHANGED(p) \
 421         ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode))
 422
 423 #define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode)
 424
 425 extern void diff_free_filepair(struct diff_filepair *);
 426
 427 extern int diff_unmodified_pair(struct diff_filepair *);
 428
 429 struct diff_queue_struct {
 430         struct diff_filepair **queue;
 431         int alloc;
 432         int nr;
 433 };
 434
 435
 436 /*
 437  *  from git:diff.h
 438  */
 439
 440
 441 struct rev_info;
 442 struct diff_options;
 443 struct diff_queue_struct;
 444
 445 typedef void (*change_fn_t)(struct diff_options *options,
 446                  unsigned old_mode, unsigned new_mode,
 447                  const unsigned char *old_sha1,
 448                  const unsigned char *new_sha1,
 449                  const char *base, const char *path);
 450
 451 typedef void (*add_remove_fn_t)(struct diff_options *options,
 452                     int addremove, unsigned mode,
 453                     const unsigned char *sha1,
 454                     const char *base, const char *path);
 455
 456 typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
 457                 struct diff_options *options, void *data);
 458
 459 #define DIFF_FORMAT_RAW         0x0001
 460 #define DIFF_FORMAT_DIFFSTAT    0x0002
 461 #define DIFF_FORMAT_NUMSTAT     0x0004
 462 #define DIFF_FORMAT_SUMMARY     0x0008
 463 #define DIFF_FORMAT_PATCH       0x0010
 464
 465 /* These override all above */
 466 #define DIFF_FORMAT_NAME        0x0100
 467 #define DIFF_FORMAT_NAME_STATUS 0x0200
 468 #define DIFF_FORMAT_CHECKDIFF   0x0400
 469
 470 /* Same as output_format = 0 but we know that -s flag was given
 471  * and we should not give default value to output_format.
 472  */
 473 #define DIFF_FORMAT_NO_OUTPUT   0x0800
 474
 475 #define DIFF_FORMAT_CALLBACK    0x1000
 476
 477 struct diff_options {
 478         const char *filter;
 479         const char *orderfile;
 480         const char *pickaxe;
 481         const char *single_follow;
 482         unsigned recursive:1,
 483                  tree_in_recursive:1,
 484                  binary:1,
 485                  text:1,
 486                  full_index:1,
 487                  silent_on_remove:1,
 488                  find_copies_harder:1,
 489                  color_diff:1,
 490                  color_diff_words:1;
 491         int context;
 492         int break_opt;
 493         int detect_rename;
 494         int line_termination;
 495         int output_format;
 496         int pickaxe_opts;
 497         int rename_score;
 498         int reverse_diff;
 499         int rename_limit;
 500         int setup;
 501         int abbrev;
 502         const char *msg_sep;
 503         const char *stat_sep;
 504         long xdl_opts;
 505
 506         int stat_width;
 507         int stat_name_width;
 508
 509         int nr_paths;
 510         const char **paths;
 511         int *pathlens;
 512         change_fn_t change;
 513         add_remove_fn_t add_remove;
 514         diff_format_fn_t format_callback;
 515         void *format_callback_data;
 516 };
 517
 518 enum color_diff {
 519         DIFF_RESET = 0,
 520         DIFF_PLAIN = 1,
 521         DIFF_METAINFO = 2,
 522         DIFF_FRAGINFO = 3,
 523         DIFF_FILE_OLD = 4,
 524         DIFF_FILE_NEW = 5,
 525         DIFF_COMMIT = 6,
 526         DIFF_WHITESPACE = 7,
 527 };
 528
 529
 530 extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
 531                           const char *base, struct diff_options *opt);
 532
 533 extern int diff_root_tree_sha1(const unsigned char *new, const char *base,
 534                                struct diff_options *opt);
 535
 536 extern int git_diff_ui_config(const char *var, const char *value);
 537 extern void diff_setup(struct diff_options *);
 538 extern int diff_opt_parse(struct diff_options *, const char **, int);
 539 extern int diff_setup_done(struct diff_options *);
 540
 541
 542 extern void diffcore_std(struct diff_options *);
 543 extern void diff_flush(struct diff_options*);
 544
 545
 546 /* diff-raw status letters */
 547 #define DIFF_STATUS_ADDED               'A'
 548 #define DIFF_STATUS_COPIED              'C'
 549 #define DIFF_STATUS_DELETED             'D'
 550 #define DIFF_STATUS_MODIFIED            'M'
 551 #define DIFF_STATUS_RENAMED             'R'
 552 #define DIFF_STATUS_TYPE_CHANGED        'T'
 553 #define DIFF_STATUS_UNKNOWN             'X'
 554 #define DIFF_STATUS_UNMERGED            'U'
 555
 556
 557
 558 /*
 559  * from git:refs.g
 560  */
 561
 562 typedef int each_ref_fn(const char *refname, const unsigned char *sha1, int flags, void *cb_data);
 563 extern int head_ref(each_ref_fn, void *);
 564 extern int for_each_ref(each_ref_fn, void *);
 565 extern int for_each_tag_ref(each_ref_fn, void *);
 566 extern int for_each_branch_ref(each_ref_fn, void *);
 567 extern int for_each_remote_ref(each_ref_fn, void *);
 568
 569
 570
 571 /*
 572  * from git:revision.h
 573  */
 574
 575 struct rev_info;
 576 struct log_info;
 577
 578 typedef void (prune_fn_t)(struct rev_info *revs, struct commit *commit);
 579
 580 struct rev_info {
 581         /* Starting list */
 582         struct commit_list *commits;
 583         struct object_array pending;
 584
 585         /* Basic information */
 586         const char *prefix;
 587         void *prune_data;
 588         prune_fn_t *prune_fn;
 589
 590         /* Traversal flags */
 591         unsigned int    dense:1,
 592                         no_merges:1,
 593                         no_walk:1,
 594                         remove_empty_trees:1,
 595                         simplify_history:1,
 596                         lifo:1,
 597                         topo_order:1,
 598                         tag_objects:1,
 599                         tree_objects:1,
 600                         blob_objects:1,
 601                         edge_hint:1,
 602                         limited:1,
 603                         unpacked:1, /* see also ignore_packed below */
 604                         boundary:1,
 605                         parents:1;
 606
 607         /* Diff flags */
 608         unsigned int    diff:1,
 609                         full_diff:1,
 610                         show_root_diff:1,
 611                         no_commit_id:1,
 612                         verbose_header:1,
 613                         ignore_merges:1,
 614                         combine_merges:1,
 615                         dense_combined_merges:1,
 616                         always_show_header:1;
 617
 618         /* Format info */
 619         unsigned int    shown_one:1,
 620                         abbrev_commit:1,
 621                         relative_date:1;
 622
 623         const char **ignore_packed; /* pretend objects in these are unpacked */
 624         int num_ignore_packed;
 625
 626         unsigned int    abbrev;
 627         enum cmit_fmt   commit_format;
 628         struct log_info *loginfo;
 629         int             nr, total;
 630         const char      *mime_boundary;
 631         const char      *message_id;
 632         const char      *ref_message_id;
 633         const char      *add_signoff;
 634         const char      *extra_headers;
 635
 636         /* Filter by commit log message */
 637         struct grep_opt *grep_filter;
 638
 639         /* special limits */
 640         int max_count;
 641         unsigned long max_age;
 642         unsigned long min_age;
 643
 644         /* diff info for patches and for paths limiting */
 645         struct diff_options diffopt;
 646         struct diff_options pruning;
 647
 648         topo_sort_set_fn_t topo_setter;
 649         topo_sort_get_fn_t topo_getter;
 650 };
 651
 652
 653 extern void init_revisions(struct rev_info *revs, const char *prefix);
 654 extern int setup_revisions(int argc, const char **argv, struct rev_info *revs, const char *def);
 655 extern int handle_revision_arg(const char *arg, struct rev_info *revs,int flags,int cant_be_filename);
 656
 657 extern void prepare_revision_walk(struct rev_info *revs);
 658 extern struct commit *get_revision(struct rev_info *revs);
 659
 660
 661
 662 /* from git:log-tree.h */
 663
 664 int log_tree_commit(struct rev_info *, struct commit *);
 665
 666
 667
 668 #endif /* GIT_H */