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git.proxmox.com Git - libgit2.git/blob - src/fileops.h
2 * fileops.h - OS agnostic disk io operations
4 * This header describes the strictly internal part of the api
6 #ifndef INCLUDE_fileops_h__
7 #define INCLUDE_fileops_h__
9 /** Force 64 bit off_t size on POSIX. */
10 #define _FILE_OFFSET_BITS 64
19 #if !defined(O_BINARY)
23 #define GITFO_BUF_INIT {NULL, 0}
26 typedef struct gitfo_cache gitfo_cache
;
28 typedef struct { /* file io buffer */
29 void *data
; /* data bytes */
30 size_t len
; /* data length */
33 extern int gitfo_exists(const char *path
);
34 extern int gitfo_open(const char *path
, int flags
);
35 extern int gitfo_creat(const char *path
, int mode
);
36 #define gitfo_close(fd) close(fd)
38 extern int gitfo_read(git_file fd
, void *buf
, size_t cnt
);
39 extern int gitfo_write(git_file fd
, void *buf
, size_t cnt
);
40 extern off_t
gitfo_size(git_file fd
);
42 extern int gitfo_read_file(gitfo_buf
*obj
, const char *path
);
43 extern void gitfo_free_buf(gitfo_buf
*obj
);
45 #define gitfo_unlink(p) unlink(p)
46 #define gitfo_rmdir(p) rmdir(p)
49 #define gitfo_mkdir(p,m) mkdir(p)
51 #define gitfo_mkdir(p,m) mkdir(p, m)
55 * Read-only map all or part of a file into memory.
56 * When possible this function should favor a virtual memory
57 * style mapping over some form of malloc()+read(), as the
58 * data access will be random and is not likely to touch the
59 * majority of the region requested.
61 * @param out buffer to populate with the mapping information.
62 * @param fd open descriptor to configure the mapping from.
63 * @param begin first byte to map, this should be page aligned.
64 * @param end number of bytes to map.
66 * - GIT_SUCCESS on success;
67 * - GIT_EOSERR on an unspecified OS related error.
69 extern int gitfo_map_ro(
76 * Release the memory associated with a previous memory mapping.
77 * @param map the mapping description previously configured.
79 extern void gitfo_free_map(git_map
*map
);
82 * Walk each directory entry, except '.' and '..', calling fn(state).
84 * @param pathbuf buffer the function reads the initial directory
85 * path from, and updates with each successive entry's name.
86 * @param pathmax maximum allocation of pathbuf.
87 * @param fn function to invoke with each entry. The first arg is
88 * the input state and the second arg is pathbuf. The function
89 * may modify the pathbuf, but only by appending new text.
90 * @param state to pass to fn as the first arg.
92 extern int gitfo_dirent(
95 int (*fn
)(void *, char *),
98 extern gitfo_cache
*gitfo_enable_caching(git_file fd
, size_t cache_size
);
99 extern int gitfo_write_cached(gitfo_cache
*ioc
, void *buf
, size_t len
);
100 extern int gitfo_flush_cached(gitfo_cache
*ioc
);
101 extern int gitfo_close_cached(gitfo_cache
*ioc
);
103 #endif /* INCLUDE_fileops_h__ */