| #ifndef CSUM_FILE_H |
| #define CSUM_FILE_H |
| |
| #include "cache.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; |
| size_t buffer_len; |
| unsigned char *buffer; |
| unsigned char *check_buffer; |
| |
| /** |
| * If non-zero, skip_hash indicates that we should |
| * not actually compute the hash for this hashfile and |
| * instead only use it as a buffered write. |
| */ |
| int skip_hash; |
| }; |
| |
| /* 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 *, enum fsync_component, 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 *); |
| |
| /* Verify checksum validity while reading. Returns non-zero on success. */ |
| int hashfile_checksum_valid(const unsigned char *data, size_t len); |
| |
| /* |
| * 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 |