added test cases

Sources/Info.plist

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>FMWK</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>$(CURRENT_PROJECT_VERSION)</string>
+	<key>NSHumanReadableCopyright</key>
+	<string>Copyright © 2017 Marcel Kröker. All rights reserved.</string>
+	<key>NSPrincipalClass</key>
+	<string></string>
+</dict>
+</plist>

Sources/SMP.swift

@@ -2059,7 +2059,7 @@ public class BIntMath
 			else
 			{
 				last = Limb(arc4random_uniform(UInt32.max)) |
-					(Limb(arc4random_uniform(UInt32(2 ** (singleBits - 32)))) << 32)
+					(Limb(arc4random_uniform(UInt32(2.0 ** (singleBits - 32)))) << 32)
 			}
 
 			res.append(last)
@@ -2259,15 +2259,21 @@ public struct BDouble:
 
 				if sign
 				{
-					let den = ["1"] + [Character](repeating: "0", count: Int(afterExp)!)
-					self.init(beforeExp, over: String(den))
-					return
+					if let safeAfterExp = Int(afterExp) {
+						let den = ["1"] + [Character](repeating: "0", count: safeAfterExp)
+						self.init(beforeExp, over: String(den))
+						return
+					}
+					return nil
 				}
 				else
 				{
-					let num = beforeExp + String([Character](repeating: "0", count: Int(afterExp)!))
-					self.init(num, over: "1")
-					return
+					if let safeAfterExp = Int(afterExp) {
+						let num = beforeExp + String([Character](repeating: "0", count: safeAfterExp))
+						self.init(num, over: "1")
+						return
+					}
+					return nil
 				}
 			}
 
@@ -2354,10 +2360,29 @@ public struct BDouble:
 		}
 		set
 		{
-			_precision = abs(newValue)
+			var nv = newValue
+			if nv < 0 {
+				nv = 0
+			}
+			_precision = nv
+		}
+	}
+	private var _precision : Int = BDouble.precision
+	public var precision : Int
+	{
+		get
+		{
+			return _precision
+		}
+		set
+		{
+		var nv = newValue
+		if nv < 0 {
+		nv = 0
+		}
+		_precision = nv
 		}
 	}
-	public var precision : Int = BDouble.precision
 
 	public var decimalDescription : String
 	{
@@ -2754,3 +2779,7 @@ public func ceil(_ base: BDouble) -> BInt
 
 	return retVal
 }
+
+public func pow(_ base : BDouble, _ exp : Int) -> BDouble {
+	return base**exp
+}