VirtualMachine: Add atEnd property

Author: adazem009

src/engine/virtualmachine.cpp

@@ -73,6 +73,7 @@ void VirtualMachine::setBytecode(const std::vector<unsigned int> &code)
 /*! Runs the script. */
 unsigned int *VirtualMachine::run(RunningScript *script)
 {
+    m_atEnd = false;
     return run(m_bytecode, script);
 }
 
@@ -127,6 +128,7 @@ unsigned int *VirtualMachine::run(unsigned int *pos, RunningScript *script)
     if (m_regCount > 0) {
         std::cout << "warning: VM: " << m_regCount << " registers were leaked by the script; this is most likely a bug in the VM or in the compiler" << std::endl;
     }
+    m_atEnd = true;
     return pos;
 
 do_const:

src/engine/virtualmachine.h

@@ -77,6 +77,9 @@ class LIBSCRATCHCPP_EXPORT VirtualMachine
 
         unsigned int *run(RunningScript *script);
 
+        /*! Returns true if the VM has reached the vm::OP_HALT instruction. */
+        bool atEnd() const { return m_atEnd; };
+
     private:
         unsigned int *run(unsigned int *pos, RunningScript *script);
 
@@ -89,6 +92,7 @@ class LIBSCRATCHCPP_EXPORT VirtualMachine
         Engine *m_engine = nullptr;
         RunningScript *m_script = nullptr;
         unsigned int *m_globalPos = nullptr;
+        bool m_atEnd = false;
 
         BlockFunc *m_functions;
         std::vector<BlockFunc> m_functionsVector;