| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT LIBRARY COMPONENTS -- |
| -- -- |
| -- A D A . C O N T A I N E R S . B O U N D E D _ H O L D E R S -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 2015-2021, Free Software Foundation, Inc. -- |
| -- -- |
| -- GNAT is free software; you can redistribute it and/or modify it under -- |
| -- terms of the GNU General Public License as published by the Free Soft- -- |
| -- ware Foundation; either version 3, or (at your option) any later ver- -- |
| -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- |
| -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- |
| -- or FITNESS FOR A PARTICULAR PURPOSE. -- |
| -- -- |
| -- As a special exception under Section 7 of GPL version 3, you are granted -- |
| -- additional permissions described in the GCC Runtime Library Exception, -- |
| -- version 3.1, as published by the Free Software Foundation. -- |
| -- -- |
| -- You should have received a copy of the GNU General Public License and -- |
| -- a copy of the GCC Runtime Library Exception along with this program; -- |
| -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- |
| -- <http://www.gnu.org/licenses/>. -- |
| ------------------------------------------------------------------------------ |
| |
| with Unchecked_Conversion; |
| with System.Put_Images; |
| |
| package body Ada.Containers.Bounded_Holders is |
| |
| function Size_In_Storage_Elements (Element : Element_Type) return Natural; |
| -- This returns the size of Element in storage units. It raises an |
| -- exception if the size is not a multiple of Storage_Unit, or if the size |
| -- is too big. |
| |
| ------------------------------ |
| -- Size_In_Storage_Elements -- |
| ------------------------------ |
| |
| function Size_In_Storage_Elements (Element : Element_Type) return Natural is |
| Max_Size : Natural renames Max_Size_In_Storage_Elements; |
| |
| begin |
| return S : constant Natural := Element'Size / System.Storage_Unit do |
| pragma Assert |
| (Element'Size mod System.Storage_Unit = 0, |
| "Size must be a multiple of Storage_Unit"); |
| |
| pragma Assert |
| (S <= Max_Size, "Size is too big:" & S'Img & " >" & Max_Size'Img); |
| end return; |
| end Size_In_Storage_Elements; |
| |
| function Cast is new |
| Unchecked_Conversion (System.Address, Element_Access); |
| |
| --------- |
| -- "=" -- |
| --------- |
| |
| function "=" (Left, Right : Holder) return Boolean is |
| begin |
| return Get (Left) = Get (Right); |
| end "="; |
| |
| ------------------------ |
| -- Constant_Reference -- |
| ------------------------ |
| |
| function Constant_Reference |
| (Container : aliased Holder) return not null access constant Element_Type |
| is |
| begin |
| return Cast (Container'Address); |
| end Constant_Reference; |
| |
| --------- |
| -- Get -- |
| --------- |
| |
| function Get (Container : Holder) return Element_Type is |
| begin |
| return Cast (Container'Address).all; |
| end Get; |
| |
| --------------- |
| -- Put_Image -- |
| --------------- |
| |
| procedure Put_Image |
| (S : in out Ada.Strings.Text_Buffers.Root_Buffer_Type'Class; V : Holder) |
| is |
| use System.Put_Images; |
| begin |
| Array_Before (S); |
| Element_Type'Put_Image (S, Get (V)); |
| Array_After (S); |
| end Put_Image; |
| |
| --------------- |
| -- Reference -- |
| --------------- |
| |
| function Reference |
| (Container : not null access Holder) return not null access Element_Type |
| is |
| begin |
| return Cast (Container.all'Address); |
| end Reference; |
| |
| --------- |
| -- Set -- |
| --------- |
| |
| procedure Set (Container : in out Holder; New_Item : Element_Type) is |
| Storage : Storage_Array |
| (1 .. Size_In_Storage_Elements (New_Item)) with |
| Address => New_Item'Address; |
| begin |
| Container.Data (Storage'Range) := Storage; |
| end Set; |
| |
| --------------- |
| -- To_Holder -- |
| --------------- |
| |
| function To_Holder (New_Item : Element_Type) return Holder is |
| begin |
| return Result : Holder do |
| Set (Result, New_Item); |
| end return; |
| end To_Holder; |
| |
| end Ada.Containers.Bounded_Holders; |
