| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- S Y S T E M . I M G _ B O O L -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 1992-2022, 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. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- Boolean'Image |
| |
| -- Preconditions in this unit are meant for analysis only, not for run-time |
| -- checking, so that the expected exceptions are raised. This is enforced by |
| -- setting the corresponding assertion policy to Ignore. Postconditions and |
| -- contract cases should not be executed at runtime as well, in order not to |
| -- slow down the execution of these functions. |
| |
| pragma Assertion_Policy (Pre => Ignore, |
| Post => Ignore, |
| Contract_Cases => Ignore, |
| Ghost => Ignore); |
| |
| with System.Val_Bool; |
| |
| package System.Img_Bool |
| with SPARK_Mode, Preelaborate |
| is |
| |
| procedure Image_Boolean |
| (V : Boolean; |
| S : in out String; |
| P : out Natural) |
| with |
| Pre => S'First = 1 |
| and then (if V then S'Length >= 4 else S'Length >= 5), |
| Post => (if V then P = 4 else P = 5) |
| and then System.Val_Bool.Is_Boolean_Image_Ghost (S (1 .. P)) |
| and then System.Val_Bool.Value_Boolean (S (1 .. P)) = V; |
| -- Computes Boolean'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. |
| |
| end System.Img_Bool; |
