package IR;

public class AssignOperation {
  public static final int EQ=1;
  public static final int MULTEQ=2;
  public static final int DIVEQ=3;
  public static final int MODEQ=4;
  public static final int PLUSEQ=5;
  public static final int MINUSEQ=6;
  public static final int LSHIFTEQ=7;
  public static final int RSHIFTEQ=8;
  public static final int URSHIFTEQ=9;
  public static final int ANDEQ=10;
  public static final int XOREQ=11;
  public static final int OREQ=12;
  public static final int POSTINC=13;
  public static final int POSTDEC=14;

  private int operation;
  public AssignOperation(int op) {
    this.operation=op;
  }

  public AssignOperation(String op) {
    this.operation=parseOp(op);
  }

  public int getOp() {
    return operation;
  }

  public Operation getBaseOp() {
    switch(operation) {
    case EQ:
      return null;

    case MULTEQ:
      return new Operation(Operation.MULT);

    case DIVEQ:
      return new Operation(Operation.DIV);

    case MODEQ:
      return new Operation(Operation.MOD);

    case PLUSEQ:
      return new Operation(Operation.ADD);

    case MINUSEQ:
      return new Operation(Operation.SUB);

    case LSHIFTEQ:
      return new Operation(Operation.LEFTSHIFT);

    case RSHIFTEQ:
      return new Operation(Operation.RIGHTSHIFT);

    case URSHIFTEQ:
      return new Operation(Operation.URIGHTSHIFT);

    case ANDEQ:
      return new Operation(Operation.BIT_AND);

    case XOREQ:
      return new Operation(Operation.BIT_XOR);

    case OREQ:
      return new Operation(Operation.BIT_OR);

    case POSTINC:
      return new Operation(Operation.POSTINC);

    case POSTDEC:
      return new Operation(Operation.POSTDEC);
    }
    throw new Error();
  }

  public static int parseOp(String st) {
    if (st.equals("eq"))
      return EQ;
    else if (st.equals("multeq"))
      return MULTEQ;
    else if (st.equals("diveq"))
      return DIVEQ;
    else if (st.equals("modeq"))
      return MODEQ;
    else if (st.equals("pluseq"))
      return PLUSEQ;
    else if (st.equals("minuseq"))
      return MINUSEQ;
    else if (st.equals("lshifteq"))
      return LSHIFTEQ;
    else if (st.equals("urshifteq"))
      return URSHIFTEQ;
    else if (st.equals("rshifteq"))
      return RSHIFTEQ;
    else if (st.equals("andeq"))
      return ANDEQ;
    else if (st.equals("xoreq"))
      return XOREQ;
    else if (st.equals("oreq"))
      return OREQ;
    else if (st.equals("postinc"))
      return POSTINC;
    else if (st.equals("postdec"))
      return POSTDEC;
    else throw new Error();
  }

  public String toString() {
    if (operation==EQ)
      return "=";
    else if (operation==MULTEQ)
      return "*=";
    else if (operation==DIVEQ)
      return "/=";
    else if (operation==MODEQ)
      return "%=";
    else if (operation==PLUSEQ)
      return "+=";
    else if (operation==MINUSEQ)
      return "-=";
    else if (operation==LSHIFTEQ)
      return "<=";
    else if (operation==RSHIFTEQ)
      return ">=";
    else if (operation==RSHIFTEQ)
      return ">>=";
    else if (operation==ANDEQ)
      return "&=";
    else if (operation==XOREQ)
      return "^=";
    else if (operation==OREQ)
      return "|=";
    else if (operation==POSTINC)
      return "postinc";
    else if (operation==POSTDEC)
      return "postdec";
    else throw new Error();
  }


}