From e206ab30dd3301fe383c735ec30d6a44cc144afa Mon Sep 17 00:00:00 2001
From: Aliaksei Chapyzhenka <alex.drom@gmail.com>
Date: Mon, 6 Sep 2021 20:51:17 -0700
Subject: [PATCH] add parseTimescale API

---
 lib/parse-time-scale.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 lib/parse-time-scale.js

diff --git a/lib/parse-time-scale.js b/lib/parse-time-scale.js
new file mode 100644
index 0000000..d711d07
--- /dev/null
+++ b/lib/parse-time-scale.js
@@ -0,0 +1,14 @@
+'use strict';
+
+const parseTimescale = str => {
+  if (typeof str !== 'string') {
+    return;
+  }
+  const str1 = str.trim();
+  const m = str1.match(/^(\d+)\s*(\w+)$/);
+  const res1 = ({1: 0, 10: 1, 100: 2})[m[1]];
+  const res2 = ({s: 0, ms: -3, us: -6, ns: -9, ps: -12, fs: -15})[m[2]];
+  return res1 + res2;
+};
+
+module.exports = parseTimescale;