84 lines
4.5 KiB
Ada
84 lines
4.5 KiB
Ada
|
------------------------------------------------------------------------------
|
||
|
|
-- --
|
||
|
|
-- GNAT RUN-TIME COMPONENTS --
|
||
|
|
-- --
|
||
|
|
-- S Y S T E M . I M G _ D E C --
|
||
|
|
-- --
|
||
|
|
-- S p e c --
|
||
|
|
-- --
|
||
|
|
-- Copyright (C) 1992-2009, 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. --
|
||
|
|
-- --
|
||
|
|
------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
-- 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;
|