From 10668e4cc7c59d98fca291b33007a9f83b775785 Mon Sep 17 00:00:00 2001
From: Bixilon <bixilon@bixilon.de>
Date: Mon, 22 Mar 2021 15:16:28 +0100
Subject: [PATCH] Stopwatch

---
 .../de/bixilon/minosoft/util/Stopwatch.kt     | 41 +++++++++++++++++++
 .../de/bixilon/minosoft/util/UnitFormatter.kt | 17 ++++++--
 2 files changed, 55 insertions(+), 3 deletions(-)
 create mode 100644 src/main/java/de/bixilon/minosoft/util/Stopwatch.kt

diff --git a/src/main/java/de/bixilon/minosoft/util/Stopwatch.kt b/src/main/java/de/bixilon/minosoft/util/Stopwatch.kt
new file mode 100644
index 000000000..1b7f63db8
--- /dev/null
+++ b/src/main/java/de/bixilon/minosoft/util/Stopwatch.kt
@@ -0,0 +1,41 @@
+/*
+ * Minosoft
+ * Copyright (C) 2021 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program.If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+
+package de.bixilon.minosoft.util
+
+import de.bixilon.minosoft.util.logging.Log
+
+class Stopwatch {
+    val id = LAST_ID++
+    private val startTime = System.nanoTime()
+    private val labs: MutableList<Long> = mutableListOf()
+
+    /**
+     * @return Returns the difference between the last lab and their new one
+     */
+    fun lab(): Long {
+        val currentTime = System.nanoTime()
+        val lastLab = labs.getOrNull(0) ?: startTime
+        labs.add(currentTime)
+        return currentTime - lastLab
+    }
+
+    fun labPrint() {
+        val delta = lab()
+        Log.info("Stop watch ($id) lab: ${UnitFormatter.formatNanos(delta)}")
+    }
+
+    companion object {
+        private var LAST_ID = 0
+    }
+}
diff --git a/src/main/java/de/bixilon/minosoft/util/UnitFormatter.kt b/src/main/java/de/bixilon/minosoft/util/UnitFormatter.kt
index fd6f16191..121ea4c63 100644
--- a/src/main/java/de/bixilon/minosoft/util/UnitFormatter.kt
+++ b/src/main/java/de/bixilon/minosoft/util/UnitFormatter.kt
@@ -14,8 +14,9 @@
 package de.bixilon.minosoft.util
 
 object UnitFormatter {
-    private val BYTE_UNITS = listOf("B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB")
-    private val UNITS = listOf("", "k", "M", "G", "T", "P", "E", "Z", "Y")
+    private val BYTE_UNITS = arrayOf("B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB")
+    private val UNITS = arrayOf("", "k", "M", "G", "T", "P", "E", "Z", "Y")
+    private val TIME_UNITS = arrayOf("ns", "μs", "ms", "s", "m", "h", "d", "w", "M", "Y")
 
     fun formatBytes(bytes: Long): String {
         return formatUnit(bytes, BYTE_UNITS, 1024L)
@@ -29,7 +30,7 @@ object UnitFormatter {
         return formatUnit(number, UNITS, 1000L)
     }
 
-    private fun formatUnit(number: Long, units: List<String>, factor: Long): String {
+    private fun formatUnit(number: Long, units: Array<String>, factor: Long): String {
         var lastFactor = 1L
         var currentFactor = factor
         for (unit in units) {
@@ -44,4 +45,14 @@ object UnitFormatter {
         }
         throw IllegalArgumentException()
     }
+
+    fun formatNanos(nanos: Long): String {
+        return "${nanos / 1000000}ms"
+
+        // ToDo
+    }
+
+    fun formatMillis(millis: Long): String {
+        return formatNanos(millis * 1000)
+    }
 }