1 ------------------------------------------------------------------------------
3 -- GNAT RUNTIME COMPONENTS --
5 -- S Y S T E M . I M G _ R E A L --
10 -- Copyright (C) 1992-2000 Free Software Foundation, Inc. --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNAT was originally developed by the GNAT team at New York University. --
31 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
33 ------------------------------------------------------------------------------
35 -- Image for fixed and float types (also used for Float_IO/Fixed_IO output)
37 package System.Img_Real is
38 pragma Preelaborate (Img_Real);
40 function Image_Ordinary_Fixed_Point
44 -- Computes the image of V and returns the result according to the rules
45 -- for image for fixed-point types (RM 3.5(34)), where Aft is the value of
46 -- the Aft attribute for the fixed-point type. This function is used only
47 -- for ordinary fixed point (see package System.Img_Dec for handling of
48 -- decimal fixed-point).
50 function Image_Floating_Point
54 -- Computes the image of V and returns the result according to the rules
55 -- for image for foating-point types (RM 3.5(33)), where Digs is the value
56 -- of the Digits attribute for the floating-point type.
58 procedure Set_Image_Real
65 -- Sets the image of V starting at S (P + 1), updating P to point to the
66 -- last character stored, the caller promises that the buffer is large
67 -- enough and no check is made for this. Constraint_Error will not
68 -- necessarily be raised if this is violated, since it is perfectly valid
69 -- to compile this unit with checks off). The Fore, Aft and Exp values
70 -- can be set to any valid values for the case of use from Text_IO.