Fixed conversion between JS and NTP timestamps.

Author: colinbdclark

osc.js

@@ -380,13 +380,13 @@ var osc = osc || {};
 
     // TODO: Unit tests.
     osc.jsTimeToNTP = function (jsTime) {
-        var ms = jsTime | 0,
-            secs = (ms / 1000) | 0,
+        var ms = Math.floor(jsTime),
+            secs = ms / 1000,
+            fracSec = secs - Math.floor(secs),
             secs1900 = secs + osc.SEVENTY_YEARS_SECS,
-            fracMs = jsTime - ms,
-            fracSec = ((fracMs / 1000) * 4294967296) | 0;
+            ntpFracs = 4294967296 * fracSec;
 
-        return [secs1900, fracSec];
+        return [secs1900, ntpFracs];
     };
 
     /**

tests/js/osc-tests.js

@@ -434,6 +434,17 @@
 
     timeTagTests(timeTagTestSpecs);
 
+    test("Write native-only time tag.", function () {
+        var testSpec = timeTagTestSpecs[1],
+            expected = testSpec.timeTagBytes,
+            timeTag = {
+                native: testSpec.timeTag.native
+            };
+
+        var actual = osc.writeTimeTag(timeTag);
+        arrayEqual(actual, expected,
+            "A time tag with no raw value (only a native value) should be written correctly.");
+    });
 
     /**********************************************
      * Read Type-Only Arguments (e.g. T, F, N, I) *