[thirdparty/git.git] / csum-file.h

#ifndef CSUM_FILE_H
#define CSUM_FILE_H

#include "hash.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;
};

void hashfile_checkpoint(struct hashfile *, struct hashfile_checkpoint *);
int hashfile_truncate(struct hashfile *, struct hashfile_checkpoint *);

/* finalize_hashfile flags */
#define CSUM_CLOSE		1
#define CSUM_FSYNC		2
#define CSUM_HASH_IN_STREAM	4

struct hashfile *hashfd(int fd, const char *name);
struct hashfile *hashfd_check(const char *name);
struct hashfile *hashfd_throughput(int fd, const char *name, struct progress *tp);
int finalize_hashfile(struct hashfile *, unsigned char *, unsigned int);
void hashwrite(struct hashfile *, const void *, unsigned int);
void hashflush(struct hashfile *f);
void crc32_begin(struct hashfile *);
uint32_t crc32_end(struct hashfile *);

/*
 * Returns the total number of bytes fed to the hashfile so far (including ones
 * that have not been written out to the descriptor yet).
 */
static inline off_t hashfile_total(struct hashfile *f)
{
	return f->total + f->offset;
}

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));
}

static inline size_t hashwrite_be64(struct hashfile *f, uint64_t data)
{
	data = htonll(data);
	hashwrite(f, &data, sizeof(data));
	return sizeof(data);
}

#endif
Commit	Line	Data
	1	#ifndef CSUM_FILE_H
	2	#define CSUM_FILE_H
	3
	4	#include "hash.h"
	5
	6	struct progress;
	7
	8	/* A SHA1-protected file */
	9	struct hashfile {
	10	int fd;
	11	int check_fd;
	12	unsigned int offset;
	13	git_hash_ctx ctx;
	14	off_t total;
	15	struct progress *tp;
	16	const char *name;
	17	int do_crc;
	18	uint32_t crc32;
	19	unsigned char buffer[8192];
	20	};
	21
	22	/* Checkpoint */
	23	struct hashfile_checkpoint {
	24	off_t offset;
	25	git_hash_ctx ctx;
	26	};
	27
	28	void hashfile_checkpoint(struct hashfile , struct hashfile_checkpoint );
	29	int hashfile_truncate(struct hashfile , struct hashfile_checkpoint );
	30
	31	/* finalize_hashfile flags */
	32	#define CSUM_CLOSE 1
	33	#define CSUM_FSYNC 2
	34	#define CSUM_HASH_IN_STREAM 4
	35
	36	struct hashfile hashfd(int fd, const char name);
	37	struct hashfile hashfd_check(const char name);
	38	struct hashfile hashfd_throughput(int fd, const char name, struct progress *tp);
	39	int finalize_hashfile(struct hashfile , unsigned char , unsigned int);
	40	void hashwrite(struct hashfile , const void , unsigned int);
	41	void hashflush(struct hashfile *f);
	42	void crc32_begin(struct hashfile *);
	43	uint32_t crc32_end(struct hashfile *);
	44
	45	/*
	46	* Returns the total number of bytes fed to the hashfile so far (including ones
	47	* that have not been written out to the descriptor yet).
	48	*/
	49	static inline off_t hashfile_total(struct hashfile *f)
	50	{
	51	return f->total + f->offset;
	52	}
	53
	54	static inline void hashwrite_u8(struct hashfile *f, uint8_t data)
	55	{
	56	hashwrite(f, &data, sizeof(data));
	57	}
	58
	59	static inline void hashwrite_be32(struct hashfile *f, uint32_t data)
	60	{
	61	data = htonl(data);
	62	hashwrite(f, &data, sizeof(data));
	63	}
	64
	65	static inline size_t hashwrite_be64(struct hashfile *f, uint64_t data)
	66	{
	67	data = htonll(data);
	68	hashwrite(f, &data, sizeof(data));
	69	return sizeof(data);
	70	}
	71
	72	#endif