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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . I M A G E _ F --
-- --
-- S p e c --
-- --
-- Copyright (C) 2020-2024, 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 the routines for supporting the Image attribute for
-- ordinary fixed point types whose Small is the ratio of two Int values, and
-- also for conversion operations required in Text_IO.Fixed_IO for such types.
generic
type Int is range <>;
type Uns is mod <>;
with procedure Scaled_Divide
(X, Y, Z : Int;
Q, R : out Int;
Round : Boolean);
package System.Image_F is
procedure Image_Fixed
(V : Int;
S : in out String;
P : out Natural;
Num : Int;
Den : Int;
For0 : Natural;
Aft0 : Natural);
-- Computes fixed_type'Image (V), where V is the integer value (in units of
-- small) of an ordinary fixed point type with small Num/Den, and stores
-- 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)).
-- For0 and Aft0 are the values of the Fore and Aft attributes for the
-- fixed point type whose mantissa type is Int and whose small is Num/Den.
-- This function is used only for fixed point whose Small is an integer or
-- its reciprocal (see package System.Image_R for the handling of other
-- ordinary fixed-point types). The caller guarantees that S is long enough
-- to hold the result and has a lower bound of 1.
procedure Set_Image_Fixed
(V : Int;
S : in out String;
P : in out Natural;
Num : Int;
Den : Int;
For0 : Natural;
Aft0 : Natural;
Fore : Natural;
Aft : Natural;
Exp : Natural);
-- Sets the image of V, where V is the integer value (in units of small)
-- of a fixed point type with small Num/Den, starting at S (P + 1) and
-- updating P to point to the last character stored, the caller promises
-- that the buffer is large enough and no check is made. Constraint_Error
-- will not necessarily be raised if this requirement is violated, since
-- it is perfectly valid to compile this unit with checks off. For0 and
-- Aft0 are the values of the Fore and Aft attributes for the fixed point
-- type whose mantissa type is Int and whose small is Num/Den. The Fore,
-- Aft and Exp can be set to any valid values for use by Text_IO.Fixed_IO.
end System.Image_F;
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