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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>
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
#ifndef CSUM_FILE_H
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#define CSUM_FILE_H
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#include "hash.h"
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struct progress;
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/* A SHA1-protected file */
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struct hashfile {
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int fd;
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int check_fd;
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unsigned int offset;
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git_hash_ctx ctx;
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off_t total;
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struct progress *tp;
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const char *name;
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int do_crc;
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uint32_t crc32;
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unsigned char buffer[8192];
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};
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/* Checkpoint */
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struct hashfile_checkpoint {
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off_t offset;
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git_hash_ctx ctx;
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};
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void hashfile_checkpoint(struct hashfile *, struct hashfile_checkpoint *);
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int hashfile_truncate(struct hashfile *, struct hashfile_checkpoint *);
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/* finalize_hashfile flags */
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#define CSUM_CLOSE 1
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#define CSUM_FSYNC 2
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#define CSUM_HASH_IN_STREAM 4
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struct hashfile *hashfd(int fd, const char *name);
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struct hashfile *hashfd_check(const char *name);
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struct hashfile *hashfd_throughput(int fd, const char *name, struct progress *tp);
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int finalize_hashfile(struct hashfile *, unsigned char *, unsigned int);
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void hashwrite(struct hashfile *, const void *, unsigned int);
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void hashflush(struct hashfile *f);
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void crc32_begin(struct hashfile *);
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uint32_t crc32_end(struct hashfile *);
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/*
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* Returns the total number of bytes fed to the hashfile so far (including ones
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* that have not been written out to the descriptor yet).
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*/
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static inline off_t hashfile_total(struct hashfile *f)
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{
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return f->total + f->offset;
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}
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static inline void hashwrite_u8(struct hashfile *f, uint8_t data)
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{
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hashwrite(f, &data, sizeof(data));
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}
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static inline void hashwrite_be32(struct hashfile *f, uint32_t data)
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{
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data = htonl(data);
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hashwrite(f, &data, sizeof(data));
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}
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static inline size_t hashwrite_be64(struct hashfile *f, uint64_t data)
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{
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data = htonll(data);
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hashwrite(f, &data, sizeof(data));
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return sizeof(data);
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}
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#endif
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