libroot/posix/dirent.c

35 do_seek_dir(DIR* dir)
37 	if (dir->seek_position == dir->current_position)
42 	if (dir->seek_position < dir->current_position) {
43 		status_t status = _kern_rewind_dir(dir->fd);
49 		dir->current_position = 0;
50 		dir->entries_left = 0;
54 	while (dir->seek_position > dir->current_position) {
56 		long toSkip = dir->seek_position - dir->current_position;
57 		if (toSkip == dir->entries_left) {
59 			dir->current_position = dir->seek_position;
60 			dir->entries_left = 0;
64 		if (toSkip < dir->entries_left) {
68 					((uint8*)&dir->first_entry + dir->next_entry);
69 				dir->entries_left--;
70 				dir->next_entry += entry->d_reclen;
73 			dir->current_position = dir->seek_position;
78 		dir->current_position += dir->entries_left;
79 		dir->entries_left = 0;
81 		count = _kern_read_dir(dir->fd, &dir->first_entry,
82 			(char*)dir + DIR_BUFFER_SIZE - (char*)&dir->first_entry, USHRT_MAX);
91 		dir->next_entry = 0;
92 		dir->entries_left = count;
107 	DIR* dir = (DIR*)malloc(DIR_BUFFER_SIZE);
108 	if (dir == NULL) {
113 	dir->fd = fd;
114 	dir->entries_left = 0;
115 	dir->seek_position = 0;
116 	dir->current_position = 0;
118 	return dir;
128 	DIR* dir;
151 	dir = __create_dir_struct(dirFD);
152 	if (dir == NULL) {
157 	return dir;
164 	DIR* dir;
173 	if ((dir = __create_dir_struct(fd)) == NULL) {
178 	return dir;
183 closedir(DIR* dir)
187 	if (dir == NULL) {
192 	status = _kern_close(dir->fd);
194 	free(dir);
201 readdir(DIR* dir)
205 	if (dir->seek_position != dir->current_position) {
206 		if (do_seek_dir(dir) != 0)
210 	if (dir->entries_left > 0) {
212 			= (struct dirent *)((uint8 *)&dir->first_entry + dir->next_entry);
214 		dir->entries_left--;
215 		dir->next_entry += dirent->d_reclen;
216 		dir->seek_position++;
217 		dir->current_position++;
224 	count = _kern_read_dir(dir->fd, &dir->first_entry,
225 		(char*)dir + DIR_BUFFER_SIZE - (char*)&dir->first_entry, USHRT_MAX);
234 	dir->entries_left = count - 1;
235 	dir->next_entry = dir->first_entry.d_reclen;
236 	dir->seek_position++;
237 	dir->current_position++;
239 	return &dir->first_entry;
244 readdir_r(DIR* dir, struct dirent* entry, struct dirent** _result)
246 	ssize_t count = _kern_read_dir(dir->fd, entry, sizeof(struct dirent)
262 rewinddir(DIR* dir)
264 	dir->seek_position = 0;
269 seekdir(DIR* dir, long int position)
271 	dir->seek_position = position;
276 telldir(DIR* dir)
278 	return dir->seek_position;
283 dirfd(DIR* dir)
285 	return dir->fd;
306 	DIR* dir = opendir(path);
307 	if (dir == NULL)
313 		struct dirent* entry = readdir(dir);
350 	closedir(dir);
361 	closedir(dir);