| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- S Y S T E M . I M A G E _ R -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 1992-2021, 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 contains routines for the Image attribute of real types, and |
| -- is also for Float_IO/Fixed_IO output. |
| |
| generic |
| |
| type Num is digits <>; |
| |
| Maxpow : Positive; |
| |
| Powten_Address : System.Address; |
| |
| type Uns is mod <>; |
| |
| with procedure Set_Image_Unsigned |
| (V : Uns; |
| S : in out String; |
| P : in out Natural); |
| |
| package System.Image_R is |
| pragma Pure; |
| |
| procedure Image_Fixed_Point |
| (V : Num; |
| S : in out String; |
| P : out Natural; |
| Aft : Natural); |
| -- Computes fixed_type'Image (V) and returns the result in S (1 .. P) |
| -- updating P on return. The result is computed according to the rules for |
| -- image for fixed-point types (RM 3.5(34)), where Aft is the value of the |
| -- Aft attribute for the fixed-point type. The caller guarantees that S is |
| -- long enough to hold the result and has a lower bound of 1. |
| -- |
| -- Note: this procedure should NOT be called with V = -0.0 or V = +/-Inf. |
| |
| procedure Image_Floating_Point |
| (V : Num; |
| S : in out String; |
| P : out Natural; |
| Digs : Natural); |
| -- Computes Uns'Image (V) and returns the result in S (1 .. P) updating P |
| -- on return. The result is computed according to the rules for image for |
| -- floating-point types (RM 3.5(33)), where Digs is the value of the Digits |
| -- attribute for the floating-point type. The caller guarantees that S is |
| -- long enough to hold the result and has a lower bound of 1. |
| |
| procedure Set_Image_Real |
| (V : Num; |
| S : in out String; |
| P : in out Natural; |
| Fore : Natural; |
| Aft : Natural; |
| Exp : Natural); |
| -- Sets the image of V starting at S (P + 1), updating P to point to the |
| -- last character stored, the caller promises that the buffer is large |
| -- enough and no check is made for this. Constraint_Error will not |
| -- necessarily be raised if this is violated, since it is perfectly 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 from Text_IO. Note |
| -- that no space is stored at the start for non-negative values. |
| |
| end System.Image_R; |
