| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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; |
