Separate time -> string functions out.

1 files changed, 44 insertions, 0 deletions

diff --git a/src/util.cc b/src/util.cc
index d7b4f980..4035ffd1 100644
--- a/src/util.cc
+++ b/src/util.cc
@@ -50,6 +50,8 @@ using std::stringstream;
 using std::min;
 using std::max;
 using std::list;
+using std::setw;
+using std::setfill;
 using boost::shared_ptr;
 using boost::lexical_cast;
 using namespace libdcp;
@@ -368,3 +370,45 @@ libdcp::base64_decode (string const & in, unsigned char* out, int out_length)
 
 	return N;
 }
+
+string
+libdcp::tm_to_string (struct tm* tm)
+{
+	char buffer[64];
+	strftime (buffer, 64, "%Y-%m-%dT%I:%M:%S", tm);
+
+	int offset = 0;
+
+#ifdef LIBDCP_POSIX
+	offset = tm->tm_gmtoff / 60;
+#else
+	TIME_ZONE_INFORMATION tz;
+	GetTimeZoneInformation (&tz);
+	offset = tz.Bias;
+#endif
+	
+	return string (buffer) + utc_offset_to_string (offset);
+}
+
+/** @param b Offset from UTC to local time in minutes.
+ *  @return string of the form e.g. -01:00.
+ */
+string
+libdcp::utc_offset_to_string (int b)
+{
+	bool const negative = (b < 0);
+	b = negative ? -b : b;
+
+	int const hours = b / 60;
+	int const minutes = b % 60;
+
+	stringstream o;
+	if (negative) {
+		o << "-";
+	} else {
+		o << "+";
+	}
+
+	o << setw(2) << setfill('0') << hours << ":" << setw(2) << setfill('0') << minutes;
+	return o.str ();
+}