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#ifndef CSUM_FILE_H

#define CSUM_FILE_H

struct progress;

/* A SHA1-protected file */

struct sha1file {

int fd;

int check_fd;

unsigned int offset;

git_SHA_CTX ctx;

off_t total;

struct progress *tp;

const char *name;

int do_crc;

uint32_t crc32;

unsigned char buffer[8192];

};

/* Checkpoint */

struct sha1file_checkpoint {

off_t offset;

git_SHA_CTX ctx;

};

extern void sha1file_checkpoint(struct sha1file *, struct sha1file_checkpoint *);

extern int sha1file_truncate(struct sha1file *, struct sha1file_checkpoint *);

/* sha1close flags */

#define CSUM_CLOSE 1

#define CSUM_FSYNC 2

extern struct sha1file *sha1fd(int fd, const char *name);

extern struct sha1file *sha1fd_check(const char *name);

extern struct sha1file *sha1fd_throughput(int fd, const char *name, struct progress *tp);

extern int sha1close(struct sha1file *, unsigned char *, unsigned int);

extern void sha1write(struct sha1file *, const void *, unsigned int);

extern void sha1flush(struct sha1file *f);

extern void crc32_begin(struct sha1file *);

extern uint32_t crc32_end(struct sha1file *);

static inline void sha1write_u8(struct sha1file *f, uint8_t data)

{

sha1write(f, &data, sizeof(data));

}

static inline void sha1write_be32(struct sha1file *f, uint32_t data)

{

data = htonl(data);

sha1write(f, &data, sizeof(data));

}

#endif