gcc/ada/libgnat/a-decima.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                          A D A . D E C I M A L                           --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2020, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- This specification is derived from the Ada Reference Manual for use with --
  12 -- GNAT. The copyright notice above, and the license provisions that follow --
  13 -- apply solely to the  contents of the part following the private keyword. --
  14 --                                                                          --
  15 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  16 -- terms of the  GNU General Public License as published  by the Free Soft- --
  17 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  18 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  19 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  20 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  21 --                                                                          --
  22 -- As a special exception under Section 7 of GPL version 3, you are granted --
  23 -- additional permissions described in the GCC Runtime Library Exception,   --
  24 -- version 3.1, as published by the Free Software Foundation.               --
  25 --                                                                          --
  26 -- You should have received a copy of the GNU General Public License and    --
  27 -- a copy of the GCC Runtime Library Exception along with this program;     --
  28 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  29 -- <http://www.gnu.org/licenses/>.                                          --
  30 --                                                                          --
  31 -- GNAT was originally developed  by the GNAT team at  New York University. --
  32 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 package Ada.Decimal is
  37    pragma Pure;
  38
  39    --  The compiler makes a number of assumptions based on the following five
  40    --  constants (e.g. there is an assumption that decimal values can always
  41    --  be represented in 64-bit signed binary form), so code modifications are
  42    --  required to increase these constants.
  43
  44    Max_Scale : constant := +18;
  45    Min_Scale : constant := -18;
  46
  47    Min_Delta : constant := 1.0E-18;
  48    Max_Delta : constant := 1.0E+18;
  49
  50    Max_Decimal_Digits : constant := 18;
  51
  52    generic
  53       type Dividend_Type  is delta <> digits <>;
  54       type Divisor_Type   is delta <> digits <>;
  55       type Quotient_Type  is delta <> digits <>;
  56       type Remainder_Type is delta <> digits <>;
  57
  58    procedure Divide
  59      (Dividend  : Dividend_Type;
  60       Divisor   : Divisor_Type;
  61       Quotient  : out Quotient_Type;
  62       Remainder : out Remainder_Type);
  63
  64 private
  65    pragma Inline (Divide);
  66
  67 end Ada.Decimal;