From dec723f4b621855731111f58148ed22fa096572f Mon Sep 17 00:00:00 2001
From: Sema <jazz-dev@jazz-soft.net>
Date: Tue, 27 Jun 2023 00:06:28 -0400
Subject: [PATCH] Added helpers

---
 javascript/JZZ.js |  5 +++++
 test/common.js    | 16 ++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/javascript/JZZ.js b/javascript/JZZ.js
index 9974246..11146c7 100644
--- a/javascript/JZZ.js
+++ b/javascript/JZZ.js
@@ -1652,6 +1652,7 @@
   function _8b(n) { if (n != parseInt(n) || n < 0 || n > 0xff) _throw(n); return parseInt(n); }
   function _14b(n) { if (n != parseInt(n) || n < 0 || n > 0x3fff) _throw(n); return parseInt(n); }
   function _16b(n) { if (n != parseInt(n) || n < 0 || n > 0xffff) throw RangeError('Expected a 16-bit value: ' + n); return parseInt(n); }
+  function _20b(n) { if (n != parseInt(n) || n < 0 || n > 0xfffff) throw RangeError('Expected a 20-bit value: ' + n); return parseInt(n); }
   function _21b(n) { if (n != parseInt(n) || n < 0 || n > 0x1fffff) _throw(n); return parseInt(n); }
   function _7bn(n) { return _7b(MIDI.noteValue(n), n); }
   function _lsb(n) { return _14b(n) & 0x7f; }
@@ -2915,6 +2916,10 @@
 
   var _helperNN = {
     noop: function() { return [0, 0, 0, 0]; },
+    ticksPQN: function(n) { n = _16b(n); return [0, 0x30, n >> 8, n & 0xff]; },
+    delta: function(n) { n = _20b(n); return [0, 0x40 + (n >> 16), (n >> 8) & 0xff, n & 0xff]; },
+    clipStart: function() { return [0xf0, 0x20, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]; },
+    clipEnd: function() { return [0xf0, 0x21, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]; },
   };
   var _helperGC = {
   };
diff --git a/test/common.js b/test/common.js
index 21ffbf3..05319aa 100644
--- a/test/common.js
+++ b/test/common.js
@@ -846,6 +846,22 @@ describe('UMP messages', function() {
   it('sxMidiSoft', function() {
     assert.equal(JZZ.UMP.sxMidiSoft(5, 4, 'karaoke...').toString(), '35160020 2400046b,35266172 616f6b65,35332e2e 2e000000');
   });
+  it('ticksPQN', function() {
+    assert.equal(JZZ.UMP.ticksPQN(96).toString(), '00300060');
+    assert.throws(function() { JZZ.UMP.ticksPQN(0x10000); });
+  });
+  it('delta', function() {
+    assert.equal(JZZ.UMP.delta(96).toString(), '00400060');
+    assert.throws(function() { JZZ.UMP.delta(0x100000); });
+  });
+  it('clipStart', function() {
+    var msg = JZZ.UMP.clipStart();
+    assert.equal(typeof msg.getGroup(), 'undefined');
+    assert.equal(msg.toString(), 'f0200000 00000000 00000000 00000000');
+  });
+  it('clipEnd', function() {
+    assert.equal(JZZ.UMP.clipEnd().toString(), 'f0210000 00000000 00000000 00000000');
+  });
 });
 
 describe('SMF events', function() {