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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__
15 #define GIT_PATH_LIST_SEPARATOR ':'
18 #define GIT_PLATFORM_PATH_SEP '\\'
20 #define GIT_PLATFORM_PATH_SEP '/'
24 GIT_INLINE(int) link(const char *GIT_UNUSED(old
), const char *GIT_UNUSED(new))
32 GIT_INLINE(int) git__mkdir(const char *path
, int GIT_UNUSED(mode
))
38 extern int git__unlink(const char *path
);
39 extern int git__mkstemp(char *template);
40 extern int git__fsync(int fd
);
42 # ifndef GIT__WIN32_NO_HIDE_FILEOPS
43 # define unlink(p) git__unlink(p)
44 # define mkstemp(t) git__mkstemp(t)
45 # define mkdir(p,m) git__mkdir(p, m)
46 # define fsync(fd) git__fsync(fd)
48 #endif /* GIT_WIN32 */
51 #if !defined(O_BINARY)
55 #define GITFO_BUF_INIT {NULL, 0}
59 typedef struct { /* file io buffer */
60 void *data
; /* data bytes */
61 size_t len
; /* data length */
64 extern int gitfo_exists(const char *path
);
65 extern int gitfo_open(const char *path
, int flags
);
66 extern int gitfo_creat(const char *path
, int mode
);
67 extern int gitfo_creat_force(const char *path
, int mode
);
68 extern int gitfo_mktemp(char *path_out
, const char *filename
);
69 extern int gitfo_isdir(const char *path
);
70 extern int gitfo_isfile(const char *path
);
71 extern int gitfo_mkdir_recurs(const char *path
, int mode
);
72 extern int gitfo_mkdir_2file(const char *path
);
73 #define gitfo_close(fd) close(fd)
75 extern int gitfo_read(git_file fd
, void *buf
, size_t cnt
);
76 extern int gitfo_write(git_file fd
, void *buf
, size_t cnt
);
77 #define gitfo_lseek(f,n,w) lseek(f, n, w)
78 extern git_off_t
gitfo_size(git_file fd
);
80 extern int gitfo_read_file(gitfo_buf
*obj
, const char *path
);
81 extern void gitfo_free_buf(gitfo_buf
*obj
);
83 /* Move (rename) a file; this operation is atomic */
84 extern int gitfo_mv(const char *from
, const char *to
);
86 /* Move a file (forced); this will create the destination
87 * path if it doesn't exist */
88 extern int gitfo_mv_force(const char *from
, const char *to
);
90 #define gitfo_stat(p,b) stat(p, b)
91 #define gitfo_fstat(f,b) fstat(f, b)
93 #define gitfo_unlink(p) unlink(p)
94 #define gitfo_rmdir(p) rmdir(p)
95 #define gitfo_chdir(p) chdir(p)
96 #define gitfo_mkdir(p,m) mkdir(p, m)
98 #define gitfo_mkstemp(t) mkstemp(t)
99 #define gitfo_fsync(fd) fsync(fd)
100 #define gitfo_chmod(p,m) chmod(p, m)
103 * Read-only map all or part of a file into memory.
104 * When possible this function should favor a virtual memory
105 * style mapping over some form of malloc()+read(), as the
106 * data access will be random and is not likely to touch the
107 * majority of the region requested.
109 * @param out buffer to populate with the mapping information.
110 * @param fd open descriptor to configure the mapping from.
111 * @param begin first byte to map, this should be page aligned.
112 * @param end number of bytes to map.
114 * - GIT_SUCCESS on success;
115 * - GIT_EOSERR on an unspecified OS related error.
117 extern int gitfo_map_ro(
124 * Release the memory associated with a previous memory mapping.
125 * @param map the mapping description previously configured.
127 extern void gitfo_free_map(git_map
*map
);
130 * Walk each directory entry, except '.' and '..', calling fn(state).
132 * @param pathbuf buffer the function reads the initial directory
133 * path from, and updates with each successive entry's name.
134 * @param pathmax maximum allocation of pathbuf.
135 * @param fn function to invoke with each entry. The first arg is
136 * the input state and the second arg is pathbuf. The function
137 * may modify the pathbuf, but only by appending new text.
138 * @param state to pass to fn as the first arg.
140 extern int gitfo_dirent(
143 int (*fn
)(void *, char *),
146 extern int gitfo_cmp_path(const char *name1
, int len1
, int isdir1
,
147 const char *name2
, int len2
, int isdir2
);
149 extern int gitfo_getcwd(char *buffer_out
, size_t size
);
152 * Clean up a provided absolute or relative directory path.
154 * This prettification relies on basic operations such as coalescing
155 * multiple forward slashes into a single slash, removing '.' and
156 * './' current directory segments, and removing parent directory
157 * whenever '..' is encountered.
159 * If not empty, the returned path ends with a forward slash.
161 * For instance, this will turn "d1/s1///s2/..//../s3" into "d1/s3/".
163 * This only performs a string based analysis of the path.
164 * No checks are done to make sure the path actually makes sense from
165 * the file system perspective.
167 * @param buffer_out buffer to populate with the normalized path.
168 * @param size buffer size.
169 * @param path directory path to clean up.
171 * - GIT_SUCCESS on success;
172 * - GIT_ERROR when the input path is invalid or escapes the current directory.
174 int gitfo_prettify_dir_path(char *buffer_out
, size_t size
, const char *path
, const char *base_path
);
177 * Clean up a provided absolute or relative file path.
179 * This prettification relies on basic operations such as coalescing
180 * multiple forward slashes into a single slash, removing '.' and
181 * './' current directory segments, and removing parent directory
182 * whenever '..' is encountered.
184 * For instance, this will turn "d1/s1///s2/..//../s3" into "d1/s3".
186 * This only performs a string based analysis of the path.
187 * No checks are done to make sure the path actually makes sense from
188 * the file system perspective.
190 * @param buffer_out buffer to populate with the normalized path.
191 * @param size buffer size.
192 * @param path file path to clean up.
194 * - GIT_SUCCESS on success;
195 * - GIT_ERROR when the input path is invalid or escapes the current directory.
197 int gitfo_prettify_file_path(char *buffer_out
, size_t size
, const char *path
, const char *base_path
);
199 int gitfo_retrieve_path_root_offset(const char *path
);
201 #endif /* INCLUDE_fileops_h__ */