-/* Unix directory operations think of "." and ".." as filenames, but
- * Lisp directory operations do not. */
-int
-is_lispy_filename(const char *filename)
-{
- return strcmp(filename, ".") && strcmp(filename, "..");
-}
-
-/* Return a zero-terminated array of strings holding the Lispy filenames
- * (i.e. excluding the Unix magic "." and "..") in the named directory. */
-char**
-alloc_directory_lispy_filenames(const char *directory_name)
-{
- DIR *dir_ptr = opendir(directory_name);
- char **result = 0;
-
- if (dir_ptr) { /* if opendir success */
-
- struct voidacc va;
-
- if (0 == voidacc_ctor(&va)) { /* if voidacc_ctor success */
- struct dirent *dirent_ptr;
-
- while ( (dirent_ptr = readdir(dir_ptr)) ) { /* until end of data */
- char* original_name = dirent_ptr->d_name;
- if (is_lispy_filename(original_name)) {
- /* strdup(3) is in Linux and *BSD. If you port
- * somewhere else that doesn't have it, it's easy
- * to reimplement. */
- char* dup_name = strdup(original_name);
- if (!dup_name) { /* if strdup failure */
- goto dtors;
- }
- if (voidacc_acc(&va, dup_name)) { /* if acc failure */
- goto dtors;
- }
- }
- }
- result = (char**)voidacc_give_away_result(&va);
- }
-
- dtors:
- voidacc_dtor(&va);
- /* ignoring closedir(3) return code, since what could we do?
- *
- * "Never ask questions you don't want to know the answer to."
- * -- William Irving Zumwalt (Rich Cook, _The Wizardry Quested_) */
- closedir(dir_ptr);
- }
-
- return result;
-}
-
-/* Free a result returned by alloc_directory_lispy_filenames(). */
-void
-free_directory_lispy_filenames(char** directory_lispy_filenames)
-{
- char** p;
-
- /* Free the strings. */
- for (p = directory_lispy_filenames; *p; ++p) {
- free(*p);
- }
-
- /* Free the table of strings. */
- free(directory_lispy_filenames);
-}