MODULE Reals; (* interface based on Oberon V4 *)

  IMPORT SYSTEM, CPStrings, CPMath;

  PROCEDURE Expo*(x: REAL): INTEGER;
  BEGIN
    RETURN SHORT(CPMath.Exponent(x));
  END Expo;

  PROCEDURE ExpoL*(x: LONGREAL): INTEGER;
  BEGIN
    RETURN SHORT(CPMath.Exponent(x));
  END ExpoL;

  PROCEDURE SetExpo*(e: INTEGER; VAR x: REAL);
  BEGIN
    x := SHORT(CPMath.Real(CPMath.Mantissa(x), e));
  END SetExpo;

  PROCEDURE SetExpoL*(e: INTEGER; VAR x: LONGREAL);
  BEGIN
    x := CPMath.Real(CPMath.Mantissa(x), e);
  END SetExpoL;

  PROCEDURE Ten*(e: INTEGER): REAL;
  BEGIN
    RETURN SHORT(CPMath.IntPower(10, e));
  END Ten;

  PROCEDURE TenL*(e: INTEGER): LONGREAL;
  BEGIN
    RETURN CPMath.IntPower(10, e);
  END TenL;

  PROCEDURE Convert*(x: REAL; n: INTEGER; VAR d: ARRAY OF CHAR);
  BEGIN
    CPStrings.RealToStringForm(x, n, 0, 3, "0", d);
  END Convert;

  PROCEDURE ConvertL*(x: LONGREAL; n: INTEGER; VAR d: ARRAY OF CHAR);
  BEGIN
    CPStrings.RealToStringForm(x, n, 0, 3, "0", d);
  END ConvertL;

  PROCEDURE ConvertH*(x: REAL; VAR d: ARRAY OF CHAR);
  BEGIN
    CPStrings.IntToStringForm(SYSTEM.VAL(LONGINT, x), CPStrings.hexadecimal, 0, "0", FALSE, d);
  END ConvertH;

  PROCEDURE ConvertHL*(x: LONGREAL; VAR d: ARRAY OF CHAR);
  BEGIN
    CPStrings.IntToStringForm(SYSTEM.VAL(HUGEINT, x), CPStrings.hexadecimal, 0, "0", FALSE, d);
  END ConvertHL;

END Reals.