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
  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 /* Convert to/from hex/sha1 representation */
 128 #define MINIMUM_ABBREV 4
 129 #define DEFAULT_ABBREV 7
 130
 131 extern const unsigned char null_sha1[20];
 132
 133 extern int sha1_object_info(const unsigned char *, char *, unsigned long *);
 134
 135 extern void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size);
 136
 137 extern int get_sha1(const char *str, unsigned char *sha1);
 138 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
 139 extern char *sha1_to_hex(const unsigned char *sha1);    /* static buffer result! */
 140
 141 static inline int is_null_sha1(const unsigned char *sha1)
 142 {
 143         return !memcmp(sha1, null_sha1, 20);
 144 }
 145 static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
 146 {
 147         return memcmp(sha1, sha2, 20);
 148 }
 149 static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
 150 {
 151         memcpy(sha_dst, sha_src, 20);
 152 }
 153 static inline void hashclr(unsigned char *hash)
 154 {
 155         memset(hash, 0, 20);
 156 }
 157
 158
 159
 160
 161 /*
 162  * from git:object.h
 163  */
 164
 165 struct object_list {
 166         struct object *item;
 167         struct object_list *next;
 168 };
 169
 170 struct object_refs {
 171         unsigned count;
 172         struct object *base;
 173         struct object *ref[FLEX_ARRAY]; /* more */
 174 };
 175
 176 struct object_array {
 177         unsigned int nr;
 178         unsigned int alloc;
 179         struct object_array_entry {
 180                 struct object *item;
 181                 const char *name;
 182         } *objects;
 183 };
 184
 185 #define TYPE_BITS   3
 186 #define FLAG_BITS  27
 187
 188 /*
 189  * The object type is stored in 3 bits.
 190  */
 191 struct object {
 192         unsigned parsed : 1;
 193         unsigned used : 1;
 194         unsigned type : TYPE_BITS;
 195         unsigned flags : FLAG_BITS;
 196         unsigned char sha1[20];
 197 };
 198
 199
 200 /*
 201  * from git:tree.h
 202  */
 203
 204 struct tree {
 205         struct object object;
 206         void *buffer;
 207         unsigned long size;
 208 };
 209
 210
 211 struct tree *lookup_tree(const unsigned char *sha1);
 212 int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size);
 213 int parse_tree(struct tree *tree);
 214 struct tree *parse_tree_indirect(const unsigned char *sha1);
 215
 216 typedef int (*read_tree_fn_t)(const unsigned char *, const char *, int, const char *, unsigned int, int);
 217
 218 extern int read_tree_recursive(struct tree *tree,
 219                                const char *base, int baselen,
 220                                int stage, const char **match,
 221                                read_tree_fn_t fn);
 222
 223 extern int read_tree(struct tree *tree, int stage, const char **paths);
 224
 225
 226 /* from git:commit.h */
 227
 228 struct commit_list {
 229         struct commit *item;
 230         struct commit_list *next;
 231 };
 232
 233 struct commit {
 234         struct object object;
 235         void *util;
 236         unsigned long date;
 237         struct commit_list *parents;
 238         struct tree *tree;
 239         char *buffer;
 240 };
 241
 242
 243 struct commit *lookup_commit(const unsigned char *sha1);
 244 struct commit *lookup_commit_reference(const unsigned char *sha1);
 245 struct commit *lookup_commit_reference_gently(const unsigned char *sha1,
 246                                               int quiet);
 247
 248 int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size);
 249 int parse_commit(struct commit *item);
 250
 251 struct commit_list * commit_list_insert(struct commit *item, struct commit_list **list_p);
 252 struct commit_list * insert_by_date(struct commit *item, struct commit_list **list);
 253
 254 void free_commit_list(struct commit_list *list);
 255
 256 void sort_by_date(struct commit_list **list);
 257
 258 /* Commit formats */
 259 enum cmit_fmt {
 260         CMIT_FMT_RAW,
 261         CMIT_FMT_MEDIUM,
 262         CMIT_FMT_DEFAULT = CMIT_FMT_MEDIUM,
 263         CMIT_FMT_SHORT,
 264         CMIT_FMT_FULL,
 265         CMIT_FMT_FULLER,
 266         CMIT_FMT_ONELINE,
 267         CMIT_FMT_EMAIL,
 268
 269         CMIT_FMT_UNSPECIFIED,
 270 };
 271
 272 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);
 273
 274
 275 typedef void (*topo_sort_set_fn_t)(struct commit*, void *data);
 276 typedef void* (*topo_sort_get_fn_t)(struct commit*);
 277
 278
 279
 280 /*
 281  * from git:diffcore.h
 282  */
 283
 284 struct diff_filespec {
 285         unsigned char sha1[20];
 286         char *path;
 287         void *data;
 288         void *cnt_data;
 289         unsigned long size;
 290         int xfrm_flags;          /* for use by the xfrm */
 291         unsigned short mode;     /* file mode */
 292         unsigned sha1_valid : 1; /* if true, use sha1 and trust mode;
 293                                   * if false, use the name and read from
 294                                   * the filesystem.
 295                                   */
 296 #define DIFF_FILE_VALID(spec) (((spec)->mode) != 0)
 297         unsigned should_free : 1; /* data should be free()'ed */
 298         unsigned should_munmap : 1; /* data should be munmap()'ed */
 299 };
 300
 301 struct diff_filepair {
 302         struct diff_filespec *one;
 303         struct diff_filespec *two;
 304         unsigned short int score;
 305         char status; /* M C R N D U (see Documentation/diff-format.txt) */
 306         unsigned source_stays : 1; /* all of R/C are copies */
 307         unsigned broken_pair : 1;
 308         unsigned renamed_pair : 1;
 309 };
 310
 311 #define DIFF_PAIR_UNMERGED(p) \
 312         (!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two))
 313
 314 #define DIFF_PAIR_RENAME(p) ((p)->renamed_pair)
 315
 316 #define DIFF_PAIR_BROKEN(p) \
 317         ( (!DIFF_FILE_VALID((p)->one) != !DIFF_FILE_VALID((p)->two)) && \
 318           ((p)->broken_pair != 0) )
 319
 320 #define DIFF_PAIR_TYPE_CHANGED(p) \
 321         ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode))
 322
 323 #define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode)
 324
 325 extern void diff_free_filepair(struct diff_filepair *);
 326
 327 extern int diff_unmodified_pair(struct diff_filepair *);
 328
 329 struct diff_queue_struct {
 330         struct diff_filepair **queue;
 331         int alloc;
 332         int nr;
 333 };
 334
 335
 336 /*
 337  *  from git:diff.h
 338  */
 339
 340
 341 struct rev_info;
 342 struct diff_options;
 343 struct diff_queue_struct;
 344
 345 typedef void (*change_fn_t)(struct diff_options *options,
 346                  unsigned old_mode, unsigned new_mode,
 347                  const unsigned char *old_sha1,
 348                  const unsigned char *new_sha1,
 349                  const char *base, const char *path);
 350
 351 typedef void (*add_remove_fn_t)(struct diff_options *options,
 352                     int addremove, unsigned mode,
 353                     const unsigned char *sha1,
 354                     const char *base, const char *path);
 355
 356 typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
 357                 struct diff_options *options, void *data);
 358
 359 #define DIFF_FORMAT_RAW         0x0001
 360 #define DIFF_FORMAT_DIFFSTAT    0x0002
 361 #define DIFF_FORMAT_NUMSTAT     0x0004
 362 #define DIFF_FORMAT_SUMMARY     0x0008
 363 #define DIFF_FORMAT_PATCH       0x0010
 364
 365 /* These override all above */
 366 #define DIFF_FORMAT_NAME        0x0100
 367 #define DIFF_FORMAT_NAME_STATUS 0x0200
 368 #define DIFF_FORMAT_CHECKDIFF   0x0400
 369
 370 /* Same as output_format = 0 but we know that -s flag was given
 371  * and we should not give default value to output_format.
 372  */
 373 #define DIFF_FORMAT_NO_OUTPUT   0x0800
 374
 375 #define DIFF_FORMAT_CALLBACK    0x1000
 376
 377 struct diff_options {
 378         const char *filter;
 379         const char *orderfile;
 380         const char *pickaxe;
 381         const char *single_follow;
 382         unsigned recursive:1,
 383                  tree_in_recursive:1,
 384                  binary:1,
 385                  text:1,
 386                  full_index:1,
 387                  silent_on_remove:1,
 388                  find_copies_harder:1,
 389                  color_diff:1,
 390                  color_diff_words:1;
 391         int context;
 392         int break_opt;
 393         int detect_rename;
 394         int line_termination;
 395         int output_format;
 396         int pickaxe_opts;
 397         int rename_score;
 398         int reverse_diff;
 399         int rename_limit;
 400         int setup;
 401         int abbrev;
 402         const char *msg_sep;
 403         const char *stat_sep;
 404         long xdl_opts;
 405
 406         int stat_width;
 407         int stat_name_width;
 408
 409         int nr_paths;
 410         const char **paths;
 411         int *pathlens;
 412         change_fn_t change;
 413         add_remove_fn_t add_remove;
 414         diff_format_fn_t format_callback;
 415         void *format_callback_data;
 416 };
 417
 418 enum color_diff {
 419         DIFF_RESET = 0,
 420         DIFF_PLAIN = 1,
 421         DIFF_METAINFO = 2,
 422         DIFF_FRAGINFO = 3,
 423         DIFF_FILE_OLD = 4,
 424         DIFF_FILE_NEW = 5,
 425         DIFF_COMMIT = 6,
 426         DIFF_WHITESPACE = 7,
 427 };
 428
 429
 430 extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
 431                           const char *base, struct diff_options *opt);
 432
 433 extern int diff_root_tree_sha1(const unsigned char *new, const char *base,
 434                                struct diff_options *opt);
 435
 436 extern int git_diff_ui_config(const char *var, const char *value);
 437 extern void diff_setup(struct diff_options *);
 438 extern int diff_opt_parse(struct diff_options *, const char **, int);
 439 extern int diff_setup_done(struct diff_options *);
 440
 441
 442 extern void diffcore_std(struct diff_options *);
 443 extern void diff_flush(struct diff_options*);
 444
 445
 446 /* diff-raw status letters */
 447 #define DIFF_STATUS_ADDED               'A'
 448 #define DIFF_STATUS_COPIED              'C'
 449 #define DIFF_STATUS_DELETED             'D'
 450 #define DIFF_STATUS_MODIFIED            'M'
 451 #define DIFF_STATUS_RENAMED             'R'
 452 #define DIFF_STATUS_TYPE_CHANGED        'T'
 453 #define DIFF_STATUS_UNKNOWN             'X'
 454 #define DIFF_STATUS_UNMERGED            'U'
 455
 456
 457
 458 /*
 459  * from git:refs.g
 460  */
 461
 462 typedef int each_ref_fn(const char *refname, const unsigned char *sha1, int flags, void *cb_data);
 463 extern int head_ref(each_ref_fn, void *);
 464 extern int for_each_ref(each_ref_fn, void *);
 465 extern int for_each_tag_ref(each_ref_fn, void *);
 466 extern int for_each_branch_ref(each_ref_fn, void *);
 467 extern int for_each_remote_ref(each_ref_fn, void *);
 468
 469
 470
 471 /*
 472  * from git:revision.h
 473  */
 474
 475 struct rev_info;
 476 struct log_info;
 477
 478 typedef void (prune_fn_t)(struct rev_info *revs, struct commit *commit);
 479
 480 struct rev_info {
 481         /* Starting list */
 482         struct commit_list *commits;
 483         struct object_array pending;
 484
 485         /* Basic information */
 486         const char *prefix;
 487         void *prune_data;
 488         prune_fn_t *prune_fn;
 489
 490         /* Traversal flags */
 491         unsigned int    dense:1,
 492                         no_merges:1,
 493                         no_walk:1,
 494                         remove_empty_trees:1,
 495                         simplify_history:1,
 496                         lifo:1,
 497                         topo_order:1,
 498                         tag_objects:1,
 499                         tree_objects:1,
 500                         blob_objects:1,
 501                         edge_hint:1,
 502                         limited:1,
 503                         unpacked:1, /* see also ignore_packed below */
 504                         boundary:1,
 505                         parents:1;
 506
 507         /* Diff flags */
 508         unsigned int    diff:1,
 509                         full_diff:1,
 510                         show_root_diff:1,
 511                         no_commit_id:1,
 512                         verbose_header:1,
 513                         ignore_merges:1,
 514                         combine_merges:1,
 515                         dense_combined_merges:1,
 516                         always_show_header:1;
 517
 518         /* Format info */
 519         unsigned int    shown_one:1,
 520                         abbrev_commit:1,
 521                         relative_date:1;
 522
 523         const char **ignore_packed; /* pretend objects in these are unpacked */
 524         int num_ignore_packed;
 525
 526         unsigned int    abbrev;
 527         enum cmit_fmt   commit_format;
 528         struct log_info *loginfo;
 529         int             nr, total;
 530         const char      *mime_boundary;
 531         const char      *message_id;
 532         const char      *ref_message_id;
 533         const char      *add_signoff;
 534         const char      *extra_headers;
 535
 536         /* Filter by commit log message */
 537         struct grep_opt *grep_filter;
 538
 539         /* special limits */
 540         int max_count;
 541         unsigned long max_age;
 542         unsigned long min_age;
 543
 544         /* diff info for patches and for paths limiting */
 545         struct diff_options diffopt;
 546         struct diff_options pruning;
 547
 548         topo_sort_set_fn_t topo_setter;
 549         topo_sort_get_fn_t topo_getter;
 550 };
 551
 552
 553 extern void init_revisions(struct rev_info *revs, const char *prefix);
 554 extern int setup_revisions(int argc, const char **argv, struct rev_info *revs, const char *def);
 555 extern int handle_revision_arg(const char *arg, struct rev_info *revs,int flags,int cant_be_filename);
 556
 557 extern void prepare_revision_walk(struct rev_info *revs);
 558 extern struct commit *get_revision(struct rev_info *revs);
 559
 560
 561
 562 /* from git:log-tree.h */
 563
 564 int log_tree_commit(struct rev_info *, struct commit *);
 565
 566
 567
 568 #endif /* GIT_H */