Added partial implementation of linear operation

Author: paulorb

src/main/kotlin/operations/LinearOperation.kt

@@ -0,0 +1,21 @@
+package operations
+
+import Configuration
+import PlcMemory
+import Linear
+import java.util.concurrent.CancellationException
+import toBooleanFromBinary
+class LinearOperation {
+    private var linearVariables: MutableMap<String, Double> = mutableMapOf<String, Double>()
+    fun getNextValue(linear: Linear): String{
+        val x = linearVariables.getOrDefault(linear.symbol, linear.minX)
+        if(x + linear.step < linear.maxX) {
+            linearVariables[linear.symbol] = x + linear.step
+        }else{
+            if(linear.replay){
+                linearVariables[linear.symbol] = linear.minX
+            }
+        }
+        return (linear.a * x + linear.b).toString()
+    }
+}