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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. --
+-- --
+------------------------------------------------------------------------------
+
+-- 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;