gcc/ada/libgnat/s-valuns.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                       S Y S T E M . V A L _ U N S                        --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2024, Free Software Foundation, Inc.         --
  10 --                                                                          --
  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.                                     --
  17 --                                                                          --
  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 modular Unsigned
  33 --  values for use in Text_IO.Modular_IO, and the Value attribute.
  34
  35 --  Preconditions in this unit are meant for analysis only, not for run-time
  36 --  checking, so that the expected exceptions are raised. This is enforced by
  37 --  setting the corresponding assertion policy to Ignore. Postconditions and
  38 --  contract cases should not be executed at runtime as well, in order not to
  39 --  slow down the execution of these functions.
  40
  41 pragma Assertion_Policy (Pre                => Ignore,
  42                          Post               => Ignore,
  43                          Contract_Cases     => Ignore,
  44                          Ghost              => Ignore,
  45                          Subprogram_Variant => Ignore);
  46
  47 with System.Unsigned_Types;
  48 with System.Value_U;
  49 with System.Vs_Uns;
  50
  51 package System.Val_Uns with SPARK_Mode is
  52    pragma Preelaborate;
  53
  54    subtype Unsigned is Unsigned_Types.Unsigned;
  55
  56    package Impl is new Value_U (Unsigned, System.Vs_Uns.Spec);
  57
  58    procedure Scan_Raw_Unsigned
  59      (Str : String;
  60       Ptr : not null access Integer;
  61       Max : Integer;
  62       Res : out Unsigned)
  63      renames Impl.Scan_Raw_Unsigned;
  64
  65    procedure Scan_Unsigned
  66      (Str : String;
  67       Ptr : not null access Integer;
  68       Max : Integer;
  69       Res : out Unsigned)
  70      renames Impl.Scan_Unsigned;
  71
  72    function Value_Unsigned
  73      (Str : String) return Unsigned
  74      renames Impl.Value_Unsigned;
  75
  76 end System.Val_Uns;