1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT RUN-TIME COMPONENTS                         --
4--                                                                          --
5--                      S Y S T E M . I M G _ R E A L                       --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--          Copyright (C) 1992-2009, Free Software Foundation, Inc.         --
10--                                                                          --
11-- GNAT is free software;  you can  redistribute it  and/or modify it under --
12-- terms of the  GNU General Public License as published  by the Free Soft- --
13-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
14-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
15-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
16-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
17--                                                                          --
18-- As a special exception under Section 7 of GPL version 3, you are granted --
19-- additional permissions described in the GCC Runtime Library Exception,   --
20-- version 3.1, as published by the Free Software Foundation.               --
21--                                                                          --
22-- You should have received a copy of the GNU General Public License and    --
23-- a copy of the GCC Runtime Library Exception along with this program;     --
24-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
25-- <http://www.gnu.org/licenses/>.                                          --
26--                                                                          --
27-- GNAT was originally developed  by the GNAT team at  New York University. --
28-- Extensive contributions were provided by Ada Core Technologies Inc.      --
29--                                                                          --
30------------------------------------------------------------------------------
31
32--  Image for fixed and float types (also used for Float_IO/Fixed_IO output)
33
34package System.Img_Real is
35   pragma Pure;
36
37   procedure Image_Ordinary_Fixed_Point
38     (V   : Long_Long_Float;
39      S   : in out String;
40      P   : out Natural;
41      Aft : Natural);
42   --  Computes fixed_type'Image (V) and returns the result in S (1 .. P)
43   --  updating P on return. The result is computed according to the rules for
44   --  image for fixed-point types (RM 3.5(34)), where Aft is the value of the
45   --  Aft attribute for the fixed-point type. This function is used only for
46   --  ordinary fixed point (see package System.Img_Dec for handling of decimal
47   --  fixed-point). The caller guarantees that S is long enough to hold the
48   --  result and has a lower bound of 1.
49
50   procedure Image_Floating_Point
51     (V    : Long_Long_Float;
52      S    : in out String;
53      P    : out Natural;
54      Digs : Natural);
55   --  Computes fixed_type'Image (V) and returns the result in S (1 .. P)
56   --  updating P on return. The result is computed according to the rules for
57   --  image for floating-point types (RM 3.5(33)), where Digs is the value of
58   --  the Digits attribute for the floating-point type. The caller guarantees
59   --  that S is long enough to hold the result and has a lower bound of 1.
60
61   procedure Set_Image_Real
62     (V    : Long_Long_Float;
63      S    : out String;
64      P    : in out Natural;
65      Fore : Natural;
66      Aft  : Natural;
67      Exp  : Natural);
68   --  Sets the image of V starting at S (P + 1), updating P to point to the
69   --  last character stored, the caller promises that the buffer is large
70   --  enough and no check is made for this. Constraint_Error will not
71   --  necessarily be raised if this is violated, since it is perfectly valid
72   --  to compile this unit with checks off). The Fore, Aft and Exp values
73   --  can be set to any valid values for the case of use from Text_IO. Note
74   --  that no space is stored at the start for non-negative values.
75
76end System.Img_Real;
77