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#ifndef CSUM_FILE_H
#define CSUM_FILE_H
 
struct progress;
 
/* A SHA1-protected file */
struct hashfile {
	int fd;
	int check_fd;
	unsigned int offset;
	git_hash_ctx ctx;
	off_t total;
	struct progress *tp;
	const char *name;
	int do_crc;
	uint32_t crc32;
	unsigned char buffer[8192];
};
 
/* Checkpoint */
struct hashfile_checkpoint {
	off_t offset;
	git_hash_ctx ctx;
};
 
extern void hashfile_checkpoint(struct hashfile *, struct hashfile_checkpoint *);
extern int hashfile_truncate(struct hashfile *, struct hashfile_checkpoint *);
 
/* finalize_hashfile flags */
#define CSUM_CLOSE	1
#define CSUM_FSYNC	2
 
extern struct hashfile *hashfd(int fd, const char *name);
extern struct hashfile *hashfd_check(const char *name);
extern struct hashfile *hashfd_throughput(int fd, const char *name, struct progress *tp);
extern int finalize_hashfile(struct hashfile *, unsigned char *, unsigned int);
extern void hashwrite(struct hashfile *, const void *, unsigned int);
extern void hashflush(struct hashfile *f);
extern void crc32_begin(struct hashfile *);
extern uint32_t crc32_end(struct hashfile *);
 
static inline void hashwrite_u8(struct hashfile *f, uint8_t data)
{
	hashwrite(f, &data, sizeof(data));
}
 
static inline void hashwrite_be32(struct hashfile *f, uint32_t data)
{
	data = htonl(data);
	hashwrite(f, &data, sizeof(data));
}
 
#endif