gcc/ada/libgnat/s-vafi128.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                 S Y S T E M . V A L _ F I X E D _ 1 2 8                  --
   6 --                                                                          --
   7 --                                 S p e c                                  --
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   9 --            Copyright (C) 2020-2023, Free Software Foundation, Inc.       --
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  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
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  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  This package contains routines for scanning values for ordinary fixed point
  33 --  types up to 128-bit small and mantissa, for use in Text_IO.Decimal_IO, and
  34 --  the Value attribute for such decimal types.
  35
  36 with Interfaces;
  37 with System.Arith_128;
  38 with System.Value_F;
  39
  40 package System.Val_Fixed_128 is
  41    pragma Preelaborate;
  42
  43    subtype Int128 is Interfaces.Integer_128;
  44    subtype Uns128 is Interfaces.Unsigned_128;
  45
  46    package Impl is new Value_F (Int128, Uns128, Arith_128.Scaled_Divide128);
  47
  48    function Scan_Fixed128
  49      (Str : String;
  50       Ptr : not null access Integer;
  51       Max : Integer;
  52       Num : Int128;
  53       Den : Int128) return Int128
  54      renames Impl.Scan_Fixed;
  55
  56    function Value_Fixed128
  57      (Str : String; Num : Int128; Den : Int128) return Int128
  58      renames Impl.Value_Fixed;
  59
  60 end System.Val_Fixed_128;