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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . I M A G E _ D --
-- --
-- B o d y --
-- --
-- Copyright (C) 2020-2025, 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/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with System.Image_I;
with System.Img_Util; use System.Img_Util;
with System.Value_I_Spec;
with System.Value_U_Spec;
package body System.Image_D is
-- Contracts, ghost code, loop invariants and assertions in this unit are
-- meant for analysis only, not for run-time checking, as it would be too
-- costly otherwise. This is enforced by setting the assertion policy to
-- Ignore.
pragma Assertion_Policy (Assert => Ignore,
Assert_And_Cut => Ignore,
Contract_Cases => Ignore,
Ghost => Ignore,
Loop_Invariant => Ignore,
Pre => Ignore,
Post => Ignore,
Subprogram_Variant => Ignore);
package Uns_Spec is new System.Value_U_Spec (Uns);
package Int_Spec is new System.Value_I_Spec (Int, Uns, Uns_Spec);
package Image_I is new System.Image_I
(Int => Int,
Uns => Uns,
U_Spec => Uns_Spec,
I_Spec => Int_Spec);
procedure Set_Image_Integer
(V : Int;
S : in out String;
P : in out Natural)
renames Image_I.Set_Image_Integer;
-------------------
-- Image_Decimal --
-------------------
procedure Image_Decimal
(V : Int;
S : in out String;
P : out Natural;
Scale : Integer)
is
pragma Assert (S'First = 1);
begin
-- Add space at start for non-negative numbers
if V >= 0 then
S (1) := ' ';
P := 1;
else
P := 0;
end if;
Set_Image_Decimal (V, S, P, Scale, 1, Integer'Max (1, Scale), 0);
end Image_Decimal;
-----------------------
-- Set_Image_Decimal --
-----------------------
procedure Set_Image_Decimal
(V : Int;
S : in out String;
P : in out Natural;
Scale : Integer;
Fore : Natural;
Aft : Natural;
Exp : Natural)
is
Maxdigs : constant Natural := Int'Width;
-- Maximum length needed for Image of an Int
Digs : String (1 .. Maxdigs);
Ndigs : Natural;
-- Buffer for the image of the integer value
begin
-- Set the first character like Image
if V >= 0 then
Digs (1) := ' ';
Ndigs := 1;
else
Ndigs := 0;
end if;
Set_Image_Integer (V, Digs, Ndigs);
pragma Assert (1 <= Ndigs and then Ndigs <= Maxdigs);
Set_Decimal_Digits (Digs, Ndigs, S, P, Scale, Fore, Aft, Exp);
end Set_Image_Decimal;
end System.Image_D;
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