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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) 1992-2009, 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.      --

--                                                                          --

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--  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;