# F.2 The Package Decimal

## Static Semantics

The library package Decimal has the following declaration:

```package Ada.Decimal is
pragma Pure(Decimal);
```

```    Max_Scale : constant := implementation-defined;
Min_Scale : constant := implementation-defined;
```

```    Min_Delta : constant := 10.0**(-Max_Scale);
Max_Delta : constant := 10.0**(-Min_Scale);
```

```    Max_Decimal_Digits : constant := implementation-defined;
```

```    generic
type Dividend_Type  is delta <> digits <>;
type Divisor_Type   is delta <> digits <>;
type Quotient_Type  is delta <> digits <>;
type Remainder_Type is delta <> digits <>;
procedure Divide (Dividend  : in Dividend_Type;
Divisor   : in Divisor_Type;
Quotient  : out Quotient_Type;
Remainder : out Remainder_Type);
pragma Convention(Intrinsic, Divide);
```

```end Ada.Decimal;
```

Max_Scale is the largest N such that 10.0**(-N) is allowed as a decimal type's delta. Its type is universal_integer.

Min_Scale is the smallest N such that 10.0**(-N) is allowed as a decimal type's delta. Its type is universal_integer.

Min_Delta is the smallest value allowed for delta in a decimal_fixed_point_definition. Its type is universal_real.

Max_Delta is the largest value allowed for delta in a decimal_fixed_point_definition. Its type is universal_real.

Max_Decimal_Digits is the largest value allowed for digits in a decimal_fixed_point_definition. Its type is universal_integer.

## Static Semantics

The effect of Divide is as follows. The value of Quotient is Quotient_Type(Dividend/Divisor). The value of Remainder is Remainder_Type(Intermediate), where Intermediate is the difference between Dividend and the product of Divisor and Quotient; this result is computed exactly.

## Implementation Requirements

Decimal.Max_Decimal_Digits shall be at least 18.

Decimal.Max_Scale shall be at least 18.

Decimal.Min_Scale shall be at most 0.