| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- S Y S T E M . I M G _ U T I L -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 2020-2022, 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. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This package provides some common utilities used by the s-imgxxx files |
| |
| package System.Img_Util is |
| pragma Pure; |
| |
| Max_Real_Image_Length : constant := 5200; |
| -- If Exp is set to zero and Aft is set to Text_IO.Field'Last (i.e., 255) |
| -- then Long_Long_Float'Last generates an image whose length is slightly |
| -- less than 5200. |
| |
| procedure Set_Decimal_Digits |
| (Digs : in out String; |
| NDigs : Natural; |
| S : out String; |
| P : in out Natural; |
| Scale : Integer; |
| Fore : Natural; |
| Aft : Natural; |
| Exp : Natural); |
| -- Sets the image of Digs (1 .. NDigs), which is a string of decimal digits |
| -- preceded by either a minus sign or a space, i.e. the integer image of |
| -- the value in units of delta if this is for a decimal fixed point type |
| -- with the given Scale, or the integer image of the value converted to an |
| -- implicit decimal fixed point type with the given Scale if this is for an |
| -- ordinary fixed point type, starting at S (P + 1), updating P to point to |
| -- the last character stored. The caller promises that the buffer is large |
| -- enough and therefore no check is made for it. Constraint_Error will not |
| -- necessarily be raised if the requirement is violated since it is valid |
| -- to compile this unit with checks off. The Fore, Aft and Exp values can |
| -- be set to any valid values for the case of use by Text_IO.Decimal_IO or |
| -- Text_IO.Fixed_IO. Note that there is no leading space stored. The call |
| -- may destroy the value in Digs, which is why Digs is in-out (this happens |
| -- if rounding is required). |
| |
| type Floating_Invalid_Value is (Minus_Infinity, Infinity, Not_A_Number); |
| |
| procedure Set_Floating_Invalid_Value |
| (V : Floating_Invalid_Value; |
| S : out String; |
| P : in out Natural; |
| Fore : Natural; |
| Aft : Natural; |
| Exp : Natural); |
| -- Sets the image of a floating-point invalid value, starting at S (P + 1), |
| -- updating P to point to the last character stored. The caller promises |
| -- that the buffer is large enough and therefore no check is made for it. |
| -- Constraint_Error will not necessarily be raised if the requirement is |
| -- violated since it is valid to compile this unit with checks off. |
| |
| end System.Img_Util; |
