Add size specification parsing

frontend/includes/include.exceptions.php

@@ -55,3 +55,5 @@ class ContainerTrafficRetrieveException extends ContainerException {}
 class UnauthorizedException extends Exception {}
 class InsufficientAccessLevelException extends Exception {}
 class TemplateUnavailableException extends Exception {}
+
+class ParsingException extends Exception {}

frontend/includes/include.parsing.php

@@ -37,4 +37,58 @@ function shrink_command($command)
 	return $command;
 }
 
+function parse_size($size, $multiplier = 1024)
+{
+	/* Note that this function will always assume bytes and the given multiplier, regardless of
+	 * what is actually specified. */
+	if(preg_match("/(-?[0-9.,]+)\s*(([kKmMgGtTpPeEzZyY]?)([iI]?)([bB]?))/", $size, $matches))
+	{
+		$number = (float) $matches[1];
+		$unit = $matches[2];
+		$prefix = $matches[3];
+		$suffix = $matches[5];
+		
+		if(empty($prefix))
+		{
+			/* Size is in bytes. */
+			return $number;
+		}
+		else
+		{
+			switch(strtolower($prefix))
+			{
+				case "y":
+					$number = $number * $multiplier;
+				case "z":
+					$number = $number * $multiplier;
+				case "e":
+					$number = $number * $multiplier;
+				case "p":
+					$number = $number * $multiplier;
+				case "t":
+					$number = $number * $multiplier;
+				case "g":
+					$number = $number * $multiplier;
+				case "m":
+					$number = $number * $multiplier;
+				case "k":
+					$number = $number * $multiplier;
+					break;
+				default:
+					throw new ParsingException("No valid unit was specified.");
+			}
+			
+			return $number;
+		}
+	}
+	elseif(is_numeric($size))
+	{
+		return (int) $size;
+	}
+	else
+	{
+		throw new ParsingException("The given size specification could not be parsed.");
+	}
+}
+
 ?>

frontend/module.test.php

@@ -39,7 +39,7 @@ test_iprange("0.0.0.0/1", "0.0.0.0", "127.255.255.255", 1, 4);
 test_iprange("162.16.47.0/16", "162.16.0.0", "162.16.255.255", 16, 4);
 test_iprange("192.168.1.0/27", "192.168.1.0", "192.168.1.31", 27, 4);
 test_iprange("192.168.1.0/32", "192.168.1.0", "192.168.1.0", 32, 4);
-test_iprange("192.168.1.0", "192.168.1.0", "192.168.1.0", 0, 4);*/
+test_iprange("192.168.1.0", "192.168.1.0", "192.168.1.0", 0, 4);
 
 $sContainer = new Container(0);
 $sContainer->uHostname = "test6.cryto.net";
@@ -59,4 +59,10 @@ $sContainer->uTotalTrafficLimit = 1000000000000;
 $sContainer->InsertIntoDatabase();
 
 $sContainer->Deploy();
+*/
 
+var_dump(
+	parse_size("15m"),	parse_size("24 KB"),	parse_size("51"),
+	parse_size("2 TiB"),	parse_size("4.9GiB"),	parse_size("0.75GB"),
+	parse_size("20gb", 1000),	parse_size("14.6 TiB", 1000),	parse_size("84YB")
+);