git.h (view raw)
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
53extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
54
55
56static 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
64static 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
77static 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
87static 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
97static 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
108static 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
131extern const unsigned char null_sha1[20];
132
133extern int sha1_object_info(const unsigned char *, char *, unsigned long *);
134
135extern void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size);
136
137extern int get_sha1(const char *str, unsigned char *sha1);
138extern int get_sha1_hex(const char *hex, unsigned char *sha1);
139extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
140
141static inline int is_null_sha1(const unsigned char *sha1)
142{
143 return !memcmp(sha1, null_sha1, 20);
144}
145static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
146{
147 return memcmp(sha1, sha2, 20);
148}
149static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
150{
151 memcpy(sha_dst, sha_src, 20);
152}
153static 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
165struct object_list {
166 struct object *item;
167 struct object_list *next;
168};
169
170struct object_refs {
171 unsigned count;
172 struct object *base;
173 struct object *ref[FLEX_ARRAY]; /* more */
174};
175
176struct 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 */
191struct 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
204struct tree {
205 struct object object;
206 void *buffer;
207 unsigned long size;
208};
209
210
211struct tree *lookup_tree(const unsigned char *sha1);
212int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size);
213int parse_tree(struct tree *tree);
214struct tree *parse_tree_indirect(const unsigned char *sha1);
215
216typedef int (*read_tree_fn_t)(const unsigned char *, const char *, int, const char *, unsigned int, int);
217
218extern 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
223extern int read_tree(struct tree *tree, int stage, const char **paths);
224
225
226/* from git:commit.h */
227
228struct commit_list {
229 struct commit *item;
230 struct commit_list *next;
231};
232
233struct 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
243struct commit *lookup_commit(const unsigned char *sha1);
244struct commit *lookup_commit_reference(const unsigned char *sha1);
245struct commit *lookup_commit_reference_gently(const unsigned char *sha1,
246 int quiet);
247
248int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size);
249int parse_commit(struct commit *item);
250
251struct commit_list * commit_list_insert(struct commit *item, struct commit_list **list_p);
252struct commit_list * insert_by_date(struct commit *item, struct commit_list **list);
253
254void free_commit_list(struct commit_list *list);
255
256void sort_by_date(struct commit_list **list);
257
258/* Commit formats */
259enum 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
272extern 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
275typedef void (*topo_sort_set_fn_t)(struct commit*, void *data);
276typedef void* (*topo_sort_get_fn_t)(struct commit*);
277
278
279
280/*
281 * from git:diffcore.h
282 */
283
284struct 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
301struct 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
325extern void diff_free_filepair(struct diff_filepair *);
326
327extern int diff_unmodified_pair(struct diff_filepair *);
328
329struct 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
341struct rev_info;
342struct diff_options;
343struct diff_queue_struct;
344
345typedef 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
351typedef 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
356typedef 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
377struct 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
418enum 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
430extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
431 const char *base, struct diff_options *opt);
432
433extern int diff_root_tree_sha1(const unsigned char *new, const char *base,
434 struct diff_options *opt);
435
436extern int git_diff_ui_config(const char *var, const char *value);
437extern void diff_setup(struct diff_options *);
438extern int diff_opt_parse(struct diff_options *, const char **, int);
439extern int diff_setup_done(struct diff_options *);
440
441
442extern void diffcore_std(struct diff_options *);
443extern 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
462typedef int each_ref_fn(const char *refname, const unsigned char *sha1, int flags, void *cb_data);
463extern int head_ref(each_ref_fn, void *);
464extern int for_each_ref(each_ref_fn, void *);
465extern int for_each_tag_ref(each_ref_fn, void *);
466extern int for_each_branch_ref(each_ref_fn, void *);
467extern int for_each_remote_ref(each_ref_fn, void *);
468
469
470
471/*
472 * from git:revision.h
473 */
474
475struct rev_info;
476struct log_info;
477
478typedef void (prune_fn_t)(struct rev_info *revs, struct commit *commit);
479
480struct 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
553extern void init_revisions(struct rev_info *revs, const char *prefix);
554extern int setup_revisions(int argc, const char **argv, struct rev_info *revs, const char *def);
555extern int handle_revision_arg(const char *arg, struct rev_info *revs,int flags,int cant_be_filename);
556
557extern void prepare_revision_walk(struct rev_info *revs);
558extern struct commit *get_revision(struct rev_info *revs);
559
560
561
562/* from git:log-tree.h */
563
564int log_tree_commit(struct rev_info *, struct commit *);
565
566
567
568#endif /* GIT_H */