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tag: v1.8.1-rc0
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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 int sha1write(struct sha1file *, void *, unsigned int);
extern void sha1flush(struct sha1file *f);
extern void crc32_begin(struct sha1file *);
extern uint32_t crc32_end(struct sha1file *);

#endif
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