From 84e220b332bfffb0f2dcc39b9697a6fd6691d265 Mon Sep 17 00:00:00 2001
From: Leonard Kugis <leonard@kug.is>
Date: Mon, 25 Apr 2022 18:36:30 +0200
Subject: Initial commit

---
 src/misc/Utils.java | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100755 src/misc/Utils.java

(limited to 'src/misc/Utils.java')

diff --git a/src/misc/Utils.java b/src/misc/Utils.java
new file mode 100755
index 0000000..a3d5b0a
--- /dev/null
+++ b/src/misc/Utils.java
@@ -0,0 +1,73 @@
+package misc;
+
+
+import java.io.UnsupportedEncodingException;
+
+public class Utils {
+	
+	public static int randomInt(int from, int to) {
+		return (int) (from + Math.round(Math.random() * to));
+	}
+	
+	public static String randomStringAN(int length) {
+		String output = "";
+		char[] table = new char[] { 
+				'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 
+				'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
+				'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'
+		};
+		for(int i = 0; i<length; i++)
+			output += table[randomInt(0, table.length-1)];
+		return output;
+	}
+	
+	public static String randomStringUTF8(int length) {
+		byte[] b = new byte[length];
+		while(true) {
+			for(int i = 0; i<length; i++)
+				b[i] = (byte) Utils.randomInt(0, 255);
+			try {
+				return new String(b, "UTF-8");
+			} catch (UnsupportedEncodingException e) {
+				e.printStackTrace();
+			}
+		}
+	}
+	
+	public static int byteArrayToInt(Byte[] b) 
+	{
+	    return   b[3] & 0xFF |
+	            (b[2] & 0xFF) << 8 |
+	            (b[1] & 0xFF) << 16 |
+	            (b[0] & 0xFF) << 24;
+	}
+
+	public static Byte[] intToByteArray(int a)
+	{
+	    return new Byte[] {
+	        (byte) ((a >> 24) & 0xFF),
+	        (byte) ((a >> 16) & 0xFF),   
+	        (byte) ((a >> 8) & 0xFF),   
+	        (byte) (a & 0xFF)
+	    };
+	}
+	
+	public static int byteArrayToInt(byte[] b) 
+	{
+	    return   b[3] & 0xFF |
+	            (b[2] & 0xFF) << 8 |
+	            (b[1] & 0xFF) << 16 |
+	            (b[0] & 0xFF) << 24;
+	}
+
+	public static byte[] intTobyteArray(int a)
+	{
+	    return new byte[] {
+	        (byte) ((a >> 24) & 0xFF),
+	        (byte) ((a >> 16) & 0xFF),   
+	        (byte) ((a >> 8) & 0xFF),   
+	        (byte) (a & 0xFF)
+	    };
+	}
+
+}
-- 
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