Fifth batch for 2.19 cycle
[git/git.git] / csum-file.h
1 #ifndef CSUM_FILE_H
2 #define CSUM_FILE_H
3
4 struct progress;
5
6 /* A SHA1-protected file */
7 struct hashfile {
8 int fd;
9 int check_fd;
10 unsigned int offset;
11 git_hash_ctx ctx;
12 off_t total;
13 struct progress *tp;
14 const char *name;
15 int do_crc;
16 uint32_t crc32;
17 unsigned char buffer[8192];
18 };
19
20 /* Checkpoint */
21 struct hashfile_checkpoint {
22 off_t offset;
23 git_hash_ctx ctx;
24 };
25
26 extern void hashfile_checkpoint(struct hashfile *, struct hashfile_checkpoint *);
27 extern int hashfile_truncate(struct hashfile *, struct hashfile_checkpoint *);
28
29 /* finalize_hashfile flags */
30 #define CSUM_CLOSE 1
31 #define CSUM_FSYNC 2
32 #define CSUM_HASH_IN_STREAM 4
33
34 extern struct hashfile *hashfd(int fd, const char *name);
35 extern struct hashfile *hashfd_check(const char *name);
36 extern struct hashfile *hashfd_throughput(int fd, const char *name, struct progress *tp);
37 extern int finalize_hashfile(struct hashfile *, unsigned char *, unsigned int);
38 extern void hashwrite(struct hashfile *, const void *, unsigned int);
39 extern void hashflush(struct hashfile *f);
40 extern void crc32_begin(struct hashfile *);
41 extern uint32_t crc32_end(struct hashfile *);
42
43 static inline void hashwrite_u8(struct hashfile *f, uint8_t data)
44 {
45 hashwrite(f, &data, sizeof(data));
46 }
47
48 static inline void hashwrite_be32(struct hashfile *f, uint32_t data)
49 {
50 data = htonl(data);
51 hashwrite(f, &data, sizeof(data));
52 }
53
54 #endif