public boolean compile(String str, VMData data) {
file = str;
// FIXME:
int result = 0;
//
ANTLRStringStream input = new ANTLRStringStream(str);
StackBasicLexer lexer = new StackBasicLexer(input);
CommonTokenStream tokens = new CommonTokenStream(lexer);
StackBasicParser parser = new StackBasicParser(tokens);
// Share data here
parser.driver = this;
try {
parser.compilationUnit();
} catch (RecognitionException e) {
e.printStackTrace();
result = -1;
} finally {
parser.driver = null;
}
if (result != 0) {
return false;
}
while (!state_stack.empty()) {
State state = state_stack.peek();
switch (state.getState()) {
case State.STATE_IF:
error("if does not match endif");
break;
case State.STATE_FOR:
error("for does not match next");
state.setStart(null);
state.setEnd(null);
state.setStep(null);
break;
case State.STATE_WHILE:
error("while does not match wend");
break;
}
state_stack.pop();
}
// FIXME:
VMCode code = statement.get(statement.size() - 1);
if (code.getOp() != VMCode.VM_HALT) {
OpHalt();
}
int code_size = LabelSetting();
// FIXME:CraeteData
// from statements to data (dump to byte array)
CreateData(data, code_size);
return error_count == 0;
}
// FIXME:CraeteData
public boolean CreateData(VMData data, int code_size) {
data.command = new byte[code_size];
data.command_size = code_size;
data.value_size = variables.size();
Iterator<VMCode> it = statement.iterator();
int p = 0;
// NOTE: I forget "while" isn't 'if' !!!
while (it.hasNext()) {
VMCode code = it.next();
p = code.Get(data.command, p);
}
return true;
}
public int LabelSetting() {
int pos = 0;
Iterator<VMCode> it = statement.iterator();
while (it.hasNext()) {
VMCode code = it.next();
if (code.getOp() == VMCode.VM_MAXCOMMAND) {
labels.get(code.getArg1()).setPos(pos);
} else {
pos += code.getSize();
}
}
Iterator<VMCode> it2 = statement.iterator();
while (it2.hasNext()) {
VMCode code = it2.next();
switch (code.getOp()) {
case VMCode.VM_JMP:
case VMCode.VM_JMPC:
case VMCode.VM_JMPNC:
code.setArg1(labels.get(code.getArg1()).getPos());
break;
}
}
return pos;
}
public void debug_dump() {
System.out.println("---variables---");
variables.dump();
String[] op_name = VMCode.VM_OP_NAMES;
System.out.println("---code---");
int pos = 0;
int size = statement.size();
for (int i = 0; i < size; i++) {
VMCode code = (VMCode) statement.get(i);
System.out.print(pos + ": " + op_name[code.getOp()]);
if (code.getSize() > 1) {
System.out.print(", " + code.getArg1());
}
System.out.println();
if (code.getOp() != VMCode.VM_MAXCOMMAND) {
pos += code.getSize();
}
}
System.out.println("---");
}
