Program wrapper struct

vm/program.go

@@ -0,0 +1,5 @@
+package vm
+
+type Program struct {
+	Functions [][]*Instruction
+}

vm/state.go

@@ -6,7 +6,7 @@ type State struct {
 	running bool
 	err     error
 
-	functions        [][]*Instruction
+	program          *Program
 	functionIndex    int64
 	instructionIndex int64
 
@@ -15,9 +15,9 @@ type State struct {
 	stack            []*stackFrame
 }
 
-func NewState(functions [][]*Instruction) (*State, error) {
+func NewState(prog *Program) (*State, error) {
 	return &State{
-		functions:    functions,
+		program:      prog,
 		globalMemory: NewMemory(16),
 	}, nil
 }
@@ -43,7 +43,7 @@ func (state *State) stackFrame() *stackFrame {
 }
 
 func (state *State) function() []*Instruction {
-	return state.functions[state.functionIndex]
+	return state.program.Functions[state.functionIndex]
 }
 
 func (state *State) setError(err error) {
@@ -52,7 +52,7 @@ func (state *State) setError(err error) {
 }
 
 func (state *State) setHandlers() {
-	for _, fnc := range state.functions {
+	for _, fnc := range state.program.Functions {
 		for _, instr := range fnc {
 			handler, found := opHandlers[instr.OpCode]
 			if !found {
@@ -71,7 +71,7 @@ func (state *State) processInstruction() {
 	state.instructionIndex += 1
 	instr.opHandler(state, instr)
 
-	if state.functionIndex >= int64(len(state.functions)) {
+	if state.functionIndex >= int64(len(state.program.Functions)) {
 		state.ret()
 	}