libroot/posix/dirent.cpp

36 do_seek_dir(DIR* dir)
38 	if (dir->seek_position == dir->current_position)
43 	if (dir->seek_position < dir->current_position) {
44 		status_t status = _kern_rewind_dir(dir->fd);
50 		dir->current_position = 0;
51 		dir->entries_left = 0;
55 	while (dir->seek_position > dir->current_position) {
57 		long toSkip = dir->seek_position - dir->current_position;
58 		if (toSkip == dir->entries_left) {
60 			dir->current_position = dir->seek_position;
61 			dir->entries_left = 0;
65 		if (toSkip < dir->entries_left) {
69 					((uint8*)&dir->first_entry + dir->next_entry);
70 				dir->entries_left--;
71 				dir->next_entry += entry->d_reclen;
74 			dir->current_position = dir->seek_position;
79 		dir->current_position += dir->entries_left;
80 		dir->entries_left = 0;
82 		count = _kern_read_dir(dir->fd, &dir->first_entry,
83 			(char*)dir + DIR_BUFFER_SIZE - (char*)&dir->first_entry, USHRT_MAX);
92 		dir->next_entry = 0;
93 		dir->entries_left = count;
108 	DIR* dir = (DIR*)malloc(DIR_BUFFER_SIZE);
109 	if (dir == NULL) {
114 	dir->fd = fd;
115 	dir->entries_left = 0;
116 	dir->seek_position = 0;
117 	dir->current_position = 0;
119 	return dir;
129 	DIR* dir;
152 	dir = __create_dir_struct(dirFD);
153 	if (dir == NULL) {
158 	return dir;
165 	DIR* dir;
174 	if ((dir = __create_dir_struct(fd)) == NULL) {
179 	return dir;
184 closedir(DIR* dir)
188 	if (dir == NULL) {
193 	status = _kern_close(dir->fd);
195 	free(dir);
202 readdir(DIR* dir)
206 	if (dir->seek_position != dir->current_position) {
207 		if (do_seek_dir(dir) != 0)
211 	if (dir->entries_left > 0) {
213 			= (struct dirent *)((uint8 *)&dir->first_entry + dir->next_entry);
215 		dir->entries_left--;
216 		dir->next_entry += dirent->d_reclen;
217 		dir->seek_position++;
218 		dir->current_position++;
225 	count = _kern_read_dir(dir->fd, &dir->first_entry,
226 		(char*)dir + DIR_BUFFER_SIZE - (char*)&dir->first_entry, USHRT_MAX);
235 	dir->entries_left = count - 1;
236 	dir->next_entry = dir->first_entry.d_reclen;
237 	dir->seek_position++;
238 	dir->current_position++;
240 	return &dir->first_entry;
245 readdir_r(DIR* dir, struct dirent* entry, struct dirent** _result)
250 	struct dirent* dirent = readdir(dir);
263 rewinddir(DIR* dir)
265 	dir->seek_position = 0;
270 seekdir(DIR* dir, long int position)
272 	dir->seek_position = position;
277 telldir(DIR* dir)
279 	return dir->seek_position;
284 dirfd(DIR* dir)
286 	return dir->fd;