Java Code Examples for org.luaj.vm2.Lua#OP_RETURN

The following examples show how to use org.luaj.vm2.Lua#OP_RETURN . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: BasicBlock.java    From HtmlNative with Apache License 2.0 5 votes vote down vote up 
public static void visitBranches( Prototype p, BranchVisitor visitor ) {
	int sbx,j,c;
	int[] code = p.code;
	int n = code.length;
	for ( int i=0; i<n; i++ ) {
		int ins = code[i];
		switch ( Lua.GET_OPCODE( ins ) ) {
		case Lua.OP_LOADBOOL:
			if ( 0 == Lua.GETARG_C(ins) )
				break;
			if ( Lua.GET_OPCODE(code[i+1]) == Lua.OP_JMP  )
				throw new IllegalArgumentException("OP_LOADBOOL followed by jump at "+i);
			visitor.visitBranch( i, i+2 );
			continue;
		case Lua.OP_EQ:
		case Lua.OP_LT:
		case Lua.OP_LE:
		case Lua.OP_TEST: 
		case Lua.OP_TESTSET:
			if ( Lua.GET_OPCODE(code[i+1]) != Lua.OP_JMP  )
				throw new IllegalArgumentException("test not followed by jump at "+i); 
			sbx = Lua.GETARG_sBx(code[i+1]);
			++i;
			j = i + sbx + 1;
			visitor.visitBranch( i, j );
			visitor.visitBranch( i, i+1 ); 				
			continue;
		case Lua.OP_TFORLOOP:
		case Lua.OP_FORLOOP:
			sbx = Lua.GETARG_sBx(ins);
			j = i + sbx + 1;
			visitor.visitBranch( i, j );
			visitor.visitBranch( i, i+1 ); 				
			continue;
		case Lua.OP_JMP:
		case Lua.OP_FORPREP:
			sbx = Lua.GETARG_sBx(ins);
			j = i + sbx + 1;
			visitor.visitBranch( i, j );
			continue;
		case Lua.OP_TAILCALL:
		case Lua.OP_RETURN:
			visitor.visitReturn( i );
			continue;
		}
		if ( i+1<n && visitor.isbeg[i+1] )
			visitor.visitBranch( i, i+1 );
	}
}
Example 2
Source File: JavaBuilder.java    From luaj with MIT License 4 votes vote down vote up 
public JavaBuilder(ProtoInfo pi, String classname, String filename) {
	this.pi = pi;
	this.p = pi.prototype;
	this.classname = classname;
	
	// what class to inherit from
	superclassType = p.numparams;
	if ( p.is_vararg != 0 || superclassType >= SUPERTYPE_VARARGS )
		superclassType = SUPERTYPE_VARARGS;
	for ( int i=0, n=p.code.length; i<n; i++ ) {
		int inst = p.code[i];
		int o = Lua.GET_OPCODE(inst);
		if ( (o == Lua.OP_TAILCALL) ||
		     ((o == Lua.OP_RETURN) && (Lua.GETARG_B(inst) < 1 || Lua.GETARG_B(inst) > 2)) ) {
			superclassType = SUPERTYPE_VARARGS;
			break;
		}
	}
	
	// create class generator
	cg = new ClassGen(classname, SUPER_NAME_N[superclassType], filename,
			Constants.ACC_PUBLIC | Constants.ACC_SUPER, null);
	cp = cg.getConstantPool(); // cg creates constant pool

	// main instruction lists
	factory = new InstructionFactory(cg);
	init = new InstructionList();
	main = new InstructionList();

	// create the fields
	for ( int i=0; i<p.upvalues.length; i++ ) {
		boolean isrw = pi.isReadWriteUpvalue( pi.upvals[i] ); 
		Type uptype = isrw? (Type) TYPE_LOCALUPVALUE: (Type) TYPE_LUAVALUE;
		FieldGen fg = new FieldGen(0, uptype, upvalueName(i), cp);
		cg.addField(fg.getField());
	}
	
	// create the method
	mg = new MethodGen( Constants.ACC_PUBLIC | Constants.ACC_FINAL, // access flags
			RETURN_TYPE_N[superclassType], // return type
			ARG_TYPES_N[superclassType], // argument types
			ARG_NAMES_N[superclassType], // arg names
			METH_NAME_N[superclassType], 
			STR_LUAVALUE, // method, defining class
			main, cp);
	
	// initialize the values in the slots
	initializeSlots();	

	// initialize branching
	int nc = p.code.length;
	targets = new int[nc];
	branches = new BranchInstruction[nc];
	branchDestHandles = new InstructionHandle[nc];
	lastInstrHandles = new InstructionHandle[nc];
}
Example 3
Source File: BasicBlock.java    From luaj with MIT License 4 votes vote down vote up 
public static void visitBranches( Prototype p, BranchVisitor visitor ) {
	int sbx,j,c;
	int[] code = p.code;
	int n = code.length;
	for ( int i=0; i<n; i++ ) {
		int ins = code[i];
		switch ( Lua.GET_OPCODE( ins ) ) {
		case Lua.OP_LOADBOOL:
			if ( 0 == Lua.GETARG_C(ins) )
				break;
			if ( Lua.GET_OPCODE(code[i+1]) == Lua.OP_JMP  )
				throw new IllegalArgumentException("OP_LOADBOOL followed by jump at "+i);
			visitor.visitBranch( i, i+2 );
			continue;
		case Lua.OP_EQ:
		case Lua.OP_LT:
		case Lua.OP_LE:
		case Lua.OP_TEST: 
		case Lua.OP_TESTSET:
			if ( Lua.GET_OPCODE(code[i+1]) != Lua.OP_JMP  )
				throw new IllegalArgumentException("test not followed by jump at "+i); 
			sbx = Lua.GETARG_sBx(code[i+1]);
			++i;
			j = i + sbx + 1;
			visitor.visitBranch( i, j );
			visitor.visitBranch( i, i+1 ); 				
			continue;
		case Lua.OP_TFORLOOP:
		case Lua.OP_FORLOOP:
			sbx = Lua.GETARG_sBx(ins);
			j = i + sbx + 1;
			visitor.visitBranch( i, j );
			visitor.visitBranch( i, i+1 ); 				
			continue;
		case Lua.OP_JMP:
		case Lua.OP_FORPREP:
			sbx = Lua.GETARG_sBx(ins);
			j = i + sbx + 1;
			visitor.visitBranch( i, j );
			continue;
		case Lua.OP_TAILCALL:
		case Lua.OP_RETURN:
			visitor.visitReturn( i );
			continue;
		}
		if ( i+1<n && visitor.isbeg[i+1] )
			visitor.visitBranch( i, i+1 );
	}
}