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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . I M G _ I N T --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2025, 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. --
-- --
------------------------------------------------------------------------------
-- This package provides the subprograms supporting the ``Image`` attribute
-- and ``Ada.Text_IO.Integer_IO`` conversions routines for signed integer
-- types up to Size ``Integer'Size``.
with System.Image_I;
package System.Img_Int
with SPARK_Mode
is
package Impl is new Image_I (Integer);
procedure Image_Integer
(V : Integer;
S : in out String;
P : out Natural)
renames Impl.Image_Integer;
-- Computes Integer'Image (``V``) and stores the result in
-- ``S`` (1 .. ``P``) setting the resulting value of ``P``.
-- The caller guarantees that ``S`` is long enough to hold the result,
-- and that ``S``'First is 1.
--
-- If ``V`` is not negative, the subprogram writes the leading blank in
-- ``S``. It then calls *Set_Image_Integer* unconditionally.
procedure Set_Image_Integer
(V : Integer;
S : in out String;
P : in out Natural)
renames Impl.Set_Image_Integer;
-- Stores the image of ``V`` in ``S`` starting at ``S`` (``P`` + 1), ``P``
-- is updated to point to the last character stored. The value stored is
-- identical to the value of Integer'Image (``V``) except that no leading
-- space is stored when ``V`` is non-negative. The caller guarantees that
-- ``S`` is long enough to hold the result. ``S`` need not have a lower
-- bound of 1.
--
-- If ``V`` is negative, the subprogram writes the leading '-' character,
-- otherwise work with -``V`` (always work with negative value to avoid
-- overflow: the largest negative number is not a special case).
--
-- This subprogram then uses recursion: if the value is equal or less than
-- -10, recurse with the value divided by 10. Then add the digit for the
-- remainder.
end System.Img_Int;
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