54273d1042
Add a helper function for hashing and writing 64-bit integers in network byte order. It returns the number of written bytes. This simplifies callers that keep track of the file offset, even though this number is a constant. Suggested-by: Derrick Stolee <dstolee@microsoft.com> Original-patch-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
#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
|