1#ifndef CSUM_FILE_H
2#define CSUM_FILE_H
3
4struct progress;
5
6/* A SHA1-protected file */
7struct 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 */
21struct hashfile_checkpoint {
22 off_t offset;
23 git_hash_ctx ctx;
24};
25
26extern void hashfile_checkpoint(struct hashfile *, struct hashfile_checkpoint *);
27extern int hashfile_truncate(struct hashfile *, struct hashfile_checkpoint *);
28
29/* hashclose flags */
30#define CSUM_CLOSE 1
31#define CSUM_FSYNC 2
32
33extern struct hashfile *hashfd(int fd, const char *name);
34extern struct hashfile *hashfd_check(const char *name);
35extern struct hashfile *hashfd_throughput(int fd, const char *name, struct progress *tp);
36extern int hashclose(struct hashfile *, unsigned char *, unsigned int);
37extern void hashwrite(struct hashfile *, const void *, unsigned int);
38extern void hashflush(struct hashfile *f);
39extern void crc32_begin(struct hashfile *);
40extern uint32_t crc32_end(struct hashfile *);
41
42static inline void hashwrite_u8(struct hashfile *f, uint8_t data)
43{
44 hashwrite(f, &data, sizeof(data));
45}
46
47static inline void hashwrite_be32(struct hashfile *f, uint32_t data)
48{
49 data = htonl(data);
50 hashwrite(f, &data, sizeof(data));
51}
52
53#endif