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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . I M G _ D E C --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2007, 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 2, 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. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- Image for decimal fixed types where the size of the corresponding integer
-- type does not exceed Integer'Size (also used for Text_IO.Decimal_IO output)
package System.Img_Dec is
pragma Pure;
procedure Image_Decimal
(V : Integer;
S : in out String;
P : out Natural;
Scale : Integer);
-- Computes fixed_type'Image (V), where V is the integer value (in units of
-- delta) of a decimal type whose Scale is as given and stores the result
-- S (1 .. P), updating P to the value of L. The image is given by the
-- rules in RM 3.5(34) for fixed-point type image functions. The caller
-- guarantees that S is long enough to hold the result. S need not have a
-- lower bound of 1.
procedure Set_Image_Decimal
(V : Integer;
S : in out String;
P : in out Natural;
Scale : Integer;
Fore : Natural;
Aft : Natural;
Exp : Natural);
-- Sets the image of V, where V is the integer value (in units of delta)
-- of a decimal type with the given Scale, 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 requirement 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
-- by Text_IO.Decimal_IO. Note that there is no leading space stored.
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);
-- This procedure has the same semantics as Set_Image_Decimal, except that
-- the value in Digs (1 .. NDigs) is given as 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). The call may destroy the value in Digs,
-- which is why Digs is in-out (this happens if rounding is required).
-- Set_Decimal_Digits is shared by all the decimal image routines.
end System.Img_Dec;
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