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------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- S Y S T E M . I M G _ D E C --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 1992-2005 Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
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-- Boston, MA 02110-1301, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- Image for decimal fixed types where the size of the corresponding integer
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-- type does not exceed Integer'Size (also used for Text_IO.Decimal_IO output)
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package System.Img_Dec is
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pragma Preelaborate;
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function Image_Decimal
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(V : Integer;
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Scale : Integer)
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return String;
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-- Compute 'Image of V, the integer value (in units of delta) of a decimal
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-- type whose Scale is as given and return the result. THe image is given
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-- by the rules in RM 3.5(34) for fixed-point type image functions.
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procedure Set_Image_Decimal
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(V : Integer;
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S : out String;
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P : in out Natural;
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Scale : Integer;
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Fore : Natural;
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Aft : Natural;
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Exp : Natural);
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-- Sets the image of V, where V is the integer value (in units of delta)
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-- of a decimal type with the given Scale, starting at S (P + 1), updating
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-- P to point to the last character stored, the caller promises that the
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-- buffer is large enough and no check is made for this. Constraint_Error
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-- will not necessarily be raised if this requirement is violated, since
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-- it is perfectly valid to compile this unit with checks off. The Fore,
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-- Aft and Exp values can be set to any valid values for the case of use
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-- by Text_IO.Decimal_IO.
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procedure Set_Decimal_Digits
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(Digs : in out String;
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NDigs : Natural;
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S : out String;
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P : in out Natural;
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Scale : Integer;
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Fore : Natural;
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Aft : Natural;
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Exp : Natural);
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-- This procedure has the same semantics as Set_Image_Decimal, except that
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-- the value in Digs (1 .. NDigs) is given as a string of decimal digits
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-- preceded by either a minus sign or a space (i.e. the integer image of
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-- the value in units of delta). The call may destroy the value in Digs,
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-- which is why Digs is in-out (this happens if rounding is required).
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-- Set_Decimal_Digits is shared by all the decimal image routines.
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end System.Img_Dec;
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