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1 706 jeremybenn
------------------------------------------------------------------------------
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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) 1992-2009, 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 3,  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.                                     --
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--                                                                          --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception,   --
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-- version 3.1, as published by the Free Software Foundation.               --
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--                                                                          --
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-- You should have received a copy of the GNU General Public License and    --
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-- a copy of the GCC Runtime Library Exception along with this program;     --
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-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
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-- <http://www.gnu.org/licenses/>.                                          --
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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 Pure;
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   procedure Image_Decimal
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     (V     : Integer;
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      S     : in out String;
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      P     : out Natural;
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      Scale : Integer);
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   --  Computes fixed_type'Image (V), where V is the integer value (in units of
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   --  delta) of a decimal type whose Scale is as given and stores the result
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   --  S (1 .. P), updating P to the value of L. The image is given by the
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   --  rules in RM 3.5(34) for fixed-point type image functions. The caller
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   --  guarantees that S is long enough to hold the result. S need not have a
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   --  lower bound of 1.
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   procedure Set_Image_Decimal
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     (V     : Integer;
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      S     : in 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. Note that there is no leading space stored.
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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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