csum-file.h

   1 #ifndef CSUM_FILE_H
   2 #define CSUM_FILE_H
   3
   4 struct progress;
   5
   6 /* A SHA1-protected file */
   7 struct hashfile {
   8         int fd;
   9         int check_fd;
  10         unsigned int offset;
  11         git_hash_ctx ctx;
  12         off_t total;
  13         struct progress *tp;
  14         const char *name;
  15         int do_crc;
  16         uint32_t crc32;
  17         unsigned char buffer[8192];
  18 };
  19
  20 /* Checkpoint */
  21 struct hashfile_checkpoint {
  22         off_t offset;
  23         git_hash_ctx ctx;
  24 };
  25
  26 extern void hashfile_checkpoint(struct hashfile *, struct hashfile_checkpoint *);
  27 extern int hashfile_truncate(struct hashfile *, struct hashfile_checkpoint *);
  28
  29 /* hashclose flags */
  30 #define CSUM_CLOSE      1
  31 #define CSUM_FSYNC      2
  32
  33 extern struct hashfile *hashfd(int fd, const char *name);
  34 extern struct hashfile *hashfd_check(const char *name);
  35 extern struct hashfile *hashfd_throughput(int fd, const char *name, struct progress *tp);
  36 extern int hashclose(struct hashfile *, unsigned char *, unsigned int);
  37 extern void hashwrite(struct hashfile *, const void *, unsigned int);
  38 extern void hashflush(struct hashfile *f);
  39 extern void crc32_begin(struct hashfile *);
  40 extern uint32_t crc32_end(struct hashfile *);
  41
  42 static inline void hashwrite_u8(struct hashfile *f, uint8_t data)
  43 {
  44         hashwrite(f, &data, sizeof(data));
  45 }
  46
  47 static inline void hashwrite_be32(struct hashfile *f, uint32_t data)
  48 {
  49         data = htonl(data);
  50         hashwrite(f, &data, sizeof(data));
  51 }
  52
  53 #endif