Method simplify_path

core/string/ustring.cpp:4413–4491

}

String String::simplify_path() const {
	String s = *this;
	String drive;

	// Check if we have a special path (like res://) or a protocol identifier.
	int p = s.find("://");
	bool found = false;
	if (p > 0) {
		bool only_chars = true;
		for (int i = 0; i < p; i++) {
			if (!is_ascii_alphanumeric_char(s[i])) {
				only_chars = false;
				break;
			}
		}
		if (only_chars) {
			found = true;
			drive = s.substr(0, p + 3);
			s = s.substr(p + 3);
		}
	}
	if (!found) {
		if (is_network_share_path()) {
			// Network path, beginning with // or \\.
			drive = s.substr(0, 2);
			s = s.substr(2);
		} else if (s.begins_with("/") || s.begins_with("\\")) {
			// Absolute path.
			drive = s.substr(0, 1);
			s = s.substr(1);
		} else {
			// Windows-style drive path, like C:/ or C:\.
			p = s.find(":/");
			if (p == -1) {
				p = s.find(":\\");
			}
			if (p != -1 && p < s.find_char('/')) {
				drive = s.substr(0, p + 2);
				s = s.substr(p + 2);
			}
		}
	}

	s = s.replace_char('\\', '/');
	while (true) { // in case of using 2 or more slash
		String compare = s.replace("//", "/");
		if (s == compare) {
			break;
		} else {
			s = compare;
		}
	}
	Vector<String> dirs = s.split("/", false);

	for (int i = 0; i < dirs.size(); i++) {
		String d = dirs[i];
		if (d == ".") {
			dirs.remove_at(i);