+
+/** @return true if the metadata was (probably) last written by a version earlier
+ * than the given one; false if it definitely was not.
+ */
+bool
+Film::last_written_by_earlier_than(int major, int minor, int micro) const
+{
+ if (!_last_written_by) {
+ return true;
+ }
+
+ vector<string> parts;
+ boost::split(parts, *_last_written_by, boost::is_any_of("."));
+
+ if (parts.size() != 3) {
+ /* Not sure what's going on, so let's say it was written by an old version */
+ return true;
+ }
+
+ if (boost::ends_with(parts[2], "pre")) {
+ parts[2] = parts[2].substr(0, parts[2].length() - 3);
+ }
+
+ int our_major = dcp::raw_convert<int>(parts[0]);
+ int our_minor = dcp::raw_convert<int>(parts[1]);
+ int our_micro = dcp::raw_convert<int>(parts[2]);
+
+ if (our_major != major) {
+ return our_major < major;
+ }
+
+ if (our_minor != minor) {
+ return our_minor < minor;
+ }
+
+ return our_micro < micro;
+}
+