options {
	DEBUG_TOKEN_MANAGER = false;
	IGNORE_CASE=true ;
}

PARSER_BEGIN(NibaParser)

import java.io.*;
import java.util.Vector;
public class NibaParser
{
	private static FileGen nibagen = new FileGen();
    public static void main(String args[]) throws ParseException
    {	
	if (args.length < 1){
		System.out.println("Uso: java NibaParser <nome_arquivo>");
		System.exit(1);
	}
	NibaParser parser = null;
	try
	{
	    parser = new NibaParser (new FileInputStream (args[0]));
	}
	catch (FileNotFoundException e)
	{
	    System.err.println("Arquivo nao encontrado!");
	    System.exit (1);
	}

	try
	{
		parser.ParseFile();
		nibagen.resolveSymbols();
		nibagen.genNibaFile(new File("out.niba"));
		System.out.println("out.niba file generated suscefully!");
	}
	catch (Exception e)
	{
	    e.printStackTrace();
	}
    }
    
}

PARSER_END(NibaParser)


// ******** Inicio da Area de Regras Gramaticas ********

SKIP :
{
	"\r"
|	"\t"
|	" "
|	"\f"
|	"\n"
}

MORE:
{
	";" : INLINE_COMMENT
}

<INLINE_COMMENT>
SPECIAL_TOKEN:
{
  <SINGLE_LINE_COMMENT: "\n" | "\r" | "\r\n" > : DEFAULT
}

<INLINE_COMMENT>
MORE:
{
	< ~[] >
}

// reconhece qquer caracter como BYTE
TOKEN :
{

//Opcodes
       <OPCODE : (<LD>|<PUSHES>|<POPS>|<JUMPS>|<JP>|<CALL>|<RET>|<NOP>|<HALT>|<ADD>|<SUB>|<AND>|<XOR>|<OR>|<CP>|<INC>|<DEC>)>
|	< #LD: "ld">
//|	< #PUSH: "push">
//|	< #POP: "pop">
|	< #JPNZ: "jpnz">
|	< #JPNC: "jpnc">
|	< #JPPE: "jppe">
|	< #JPPO: "jppo">
|	< #JPZ: "jpz">
|	< #JPM: "jpm">
|	< #JPP: "jpp">
|	< #JUMPS: (<JPNZ>|<JPNC>|<JPPE>|<JPPO>|<JPZ>|<JPM>|<JPP>)>
|	< #JP: ("jp"|"jump")>
|	< #CALL: "call">
|	< #RET: "ret">
|	< #NOP: "nop">
|	< #HALT: "halt">
|	< #ADD: "add">
|	< #SUB: "sub">
|	< #AND: "and">
|	< #XOR: "xor">
|	< #OR: "or">
|	< #CP: "cp">
|	< #INC: "inc">
|	< #DEC: "dec">
|	< PUSHES: (<PUSHBC>|<PUSHDE>|<PUSHHL>)>
|	< POPS:   (<POPBC>|<POPDE>|<POPHL>)>
|	< #PUSHBC: "pushbc">
|	< #PUSHDE: "pushde">
|	< #PUSHHL: "pushhl">
|	< #POPBC: "popbc">
|	< #POPDE: "popde">
|	< #POPHL: "pophl">
|	< DATA: "data:">

//Registradores
/*|	< #REGA: "a">
|	< #REGB: "b">
|	< #REGC: "c">
|	< #REGD: "d">
|	< #REGE: "e">
|	< #REGH: "h">
|	< #REGL: "l">*/
|	< REGISTER: "$" ("a"|"b"|"c"|"d"|"e"|"h"|"l")>
//Outros
|	< TWODOT:   ":">
|	< #OUTRO_CHAR: ["_"]>
|	< #LETRA:  ["a"-"z"] >
|	< #DIGIT:  ["0"-"9","a"-"f"] >
|	< NUMBER: "0x" <DIGIT> (<DIGIT>)*>
|	< ID: <LETRA> (<LETRA>|<DIGIT>|["_"])*>
|	<LABEL: <ID> <TWODOT> >
}

void ParseFile() :
{}
{
	(Code())*
	(Data())*
	<EOF>
}

void Code():
{
	String label = "";
	String opcode;
	String param1 = "";
	String param2 = "";
}
{
	[<LABEL> {label = token.image.substring(0, token.image.length()-1);
		  nibagen.addLabel(label, nibagen.getLine()+1);
		 }
	]
	<OPCODE> {opcode = token.image;}
	[LOOKAHEAD(<NUMBER>|<REGISTER>|<ID>)
        (<NUMBER>|<REGISTER>|<ID>)
				{
//						if (param1.equals(""))
							param1 = token.image;
//						else
//							param2 = token.image;
				}
	]
	[(<NUMBER>|<REGISTER>|<ID>)
                                {
//                                                if (param1.equals(""))
  //                                                      param1 = token.image;
    //                                            else
                                                        param2 = token.image;
                                }
	]
	{
		nibagen.addCode(opcode, param1, param2);
	}
}

void Data():
{String id;}
{
	<DATA>
	(
		(<ID> {id = token.image;}
//		|<REGISTER>
		)
		<NUMBER>{nibagen.addData(id,Integer.parseInt(token.image.substring(2), 16));}
	)*
}