Fix calling convention by managing top of stack and adjusting on way in and out of function calls.

src/main/java/lua/Builtin.java

@@ -31,23 +31,23 @@ final class Builtin extends LFunction {
 	}
 	
 	// perform a lua call
-	public int luaStackCall(StackState state, int base, int nargs) {
+	public void luaStackCall(StackState state, int base) {
 		switch ( id ) {
 		case PRINT:
-			for ( int i=0; i<nargs; i++ ) {
-				if ( i > 0 )
-					System.out.print( "\t" );
-				System.out.print( String.valueOf(state.stack[base+1+i]) );
+			for ( int i=base+1, n=state.top; i<n; i++ ) {
+				System.out.print( String.valueOf(state.stack[i]) );
+				System.out.print( "\t" );
 			}
 			System.out.println();
-			return 0;
+			return;
 		case PAIRS:
+			state.adjustTop(base+2);
 			LValue value = state.stack[base+1].luaPairs();
 			state.stack[base] = value;
-			return 1;
+			state.adjustTop(base+1);
+			return;
 		default:
 			luaUnsupportedOperation();
-			return 0;
 		}
 	}
 

src/main/java/lua/io/Closure.java

@@ -17,8 +17,8 @@ public class Closure extends LValue {
 
 
 	// perform a lua call
-	public int luaStackCall(StackState state, int base, int nargs) {
-		state.clear( base+1+nargs, p.numparams-nargs );
-		return state.vmExecute( this, base+1 );
+	public void luaStackCall(StackState state, int base) {
+		state.adjustTop( base+1+p.numparams );
+		state.vmExecute( this, base+1 );
 	}
 }

src/main/java/lua/value/LTable.java

@@ -50,14 +50,15 @@ public class LTable extends LValue {
 		}
 
 		// perform a lua call
-		public int luaStackCall(StackState state, int base, int nargs) {
+		public void luaStackCall(StackState state, int base) {
 			if ( e.hasMoreElements() ) {
 				LValue key = (LValue) e.nextElement();
+				state.adjustTop(base+2);
 				state.stack[base] = key;
 				state.stack[base+1] = t.luaGetTable(key);
-				return 2;
+			} else {
+				state.adjustTop(base);
 			}
-			return 0;			
 		}
 	}
 

src/main/java/lua/value/LValue.java

@@ -15,9 +15,8 @@ public class LValue {
 	}
 
 	// perform a lua call, return number of results actually produced
-	public int luaStackCall(StackState state, int base, int nargs) {
+	public void luaStackCall(StackState state, int base) {
 		luaUnsupportedOperation();
-		return 0;
 	}
 
 	// unsupported except for numbers