public MethodStmtCompiler(ClassStmtCompiler clazz, MethodStmtToken statement) {
super(clazz.getCompiler());
this.clazz = clazz;
this.statement = statement;
this.node = new MethodNodeImpl();
this.localVariables = new LinkedHashMap<>();
entity = new MethodEntity(getCompiler().getContext());
entity.setClazz(clazz.entity);
if (statement != null) entity.setName(statement.getName().getName());
realName = entity.getName();
methodId = compiler.getScope().nextMethodIndex();
}
void writeHeader() {
int access = 0;
if (statement != null) {
if (compiler.getScope().isDebugMode()) {
statement.setDynamicLocal(true);
}
switch (statement.getModifier()) {
case PRIVATE:
access += Opcodes.ACC_PRIVATE;
break;
case PROTECTED:
access += Opcodes.ACC_PROTECTED;
break;
case PUBLIC:
access += Opcodes.ACC_PUBLIC;
break;
}
if (statement.isStatic()) access += Opcodes.ACC_STATIC;
// if (statement.isAbstract()) access += Opcodes.ACC_ABSTRACT;
if (statement.isFinal()) access += Opcodes.ACC_FINAL;
node.access = access;
node.name =
clazz.isSystem() || entity == null
? statement.getName().getName()
: entity.getInternalName();
node.desc =
Type.getMethodDescriptor(
Type.getType(Memory.class),
Type.getType(Environment.class),
Type.getType(Memory[].class));
if (external) {
node.desc =
Type.getMethodDescriptor(
Type.getType(Memory.class),
Type.getType(Environment.class),
Type.getType(Memory[].class),
Type.getType(ArrayMemory.class));
}
}
if (statement != null) {
LabelNode label = labelStart = writeLabel(node, statement.getMeta().getStartLine());
if (!statement.isStatic()) addLocalVariable("~this", label, Object.class);
ExpressionStmtCompiler expressionCompiler = new ExpressionStmtCompiler(this, null);
addLocalVariable("~env", label, Environment.class); // Environment env
LocalVariable args = addLocalVariable("~args", label, Memory[].class); // Memory[] arguments
if (statement.isDynamicLocal()) {
if (external) addLocalVariable("~passedLocal", label, ArrayMemory.class);
LocalVariable local = addLocalVariable("~local", label, ArrayMemory.class);
if (external) {
expressionCompiler.writeVarLoad("~passedLocal");
expressionCompiler.writeSysStaticCall(
ArrayMemory.class, "valueOfRef", ArrayMemory.class, ArrayMemory.class);
expressionCompiler.setStackPeekAsImmutable();
expressionCompiler.writeVarStore(local, false, true);
} else {
expressionCompiler.writePushConstNull();
expressionCompiler.writeSysStaticCall(
ArrayMemory.class, "valueOfRef", ArrayMemory.class, ArrayMemory.class);
expressionCompiler.setStackPeekAsImmutable();
expressionCompiler.writeVarStore(local, false, true);
}
}
if (statement.getUses() != null && !statement.getUses().isEmpty()) {
int i = 0;
expressionCompiler.writeVarLoad("~this");
expressionCompiler.writeGetDynamic("uses", Memory[].class);
for (ArgumentStmtToken argument : statement.getUses()) {
LocalVariable local;
if (statement.isDynamicLocal()) {
expressionCompiler.writeDefineVariable(argument.getName());
local = getLocalVariable(argument.getName().getName());
} else {
local = addLocalVariable(argument.getName().getName(), label, Memory.class);
}
if (argument.isReference()) {
local.setReference(true);
statement.variable(argument.getName()).setUnstable(true);
}
expressionCompiler.writePushDup();
expressionCompiler.writePushGetFromArray(i, Memory.class);
if (statement.isDynamicLocal()) {
expressionCompiler.writeVarAssign(local, argument.getName(), false, false);
} else {
expressionCompiler.writeVarStore(local, false, false);
}
local.pushLevel();
i++;
}
expressionCompiler.writePopAll(1);
}
int i = 0;
for (ArgumentStmtToken argument : statement.getArguments()) {
if (argument.isReference()) {
statement.variable(argument.getName()).setReference(true).setUnstable(true);
}
LabelNode next = new LabelNode();
expressionCompiler.writeDefineVariable(argument.getName());
LocalVariable local = getLocalVariable(argument.getName().getName());
if (local != null) {
expressionCompiler.writeVarLoad(args);
expressionCompiler.writePushGetFromArray(i, Memory.class);
expressionCompiler.writeVarAssign(local, argument.getName(), true, false);
// if length <= i then undefined
node.instructions.add(new JumpInsnNode(Opcodes.IFNONNULL, next));
expressionCompiler.stackPop();
if (argument.getValue() == null) expressionCompiler.writePushNull();
else expressionCompiler.writeExpression(argument.getValue(), true, false);
expressionCompiler.writeVarAssign(local, argument.getName(), false, false);
node.instructions.add(next);
local.pushLevel();
}
i++;
}
} else {
LabelNode label = labelStart = writeLabel(node, clazz.statement.getMeta().getStartLine());
}
}