gcc/ada/s-imgrea.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME COMPONENTS                          --
   4 --                                                                          --
   5 --                      S Y S T E M . I M G _ R E A L                       --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.11 $
  10 --                                                                          --
  11 --          Copyright (C) 1992-2000 Free Software Foundation, Inc.          --
  12 --                                                                          --
  13 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- As a special exception,  if other files  instantiate  generics from this --
  25 -- unit, or you link  this unit with other files  to produce an executable, --
  26 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  27 -- covered  by the  GNU  General  Public  License.  This exception does not --
  28 -- however invalidate  any other reasons why  the executable file  might be --
  29 -- covered by the  GNU Public License.                                      --
  30 --                                                                          --
  31 -- GNAT was originally developed  by the GNAT team at  New York University. --
  32 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 --  Image for fixed and float types (also used for Float_IO/Fixed_IO output)
  37
  38 package System.Img_Real is
  39 pragma Preelaborate (Img_Real);
  40
  41    function Image_Ordinary_Fixed_Point
  42      (V    : Long_Long_Float;
  43       Aft  : Natural)
  44       return String;
  45    --  Computes the image of V and returns the result according to the rules
  46    --  for image for fixed-point types (RM 3.5(34)), where Aft is the value of
  47    --  the Aft attribute for the fixed-point type. This function is used only
  48    --  for ordinary fixed point (see package System.Img_Dec for handling of
  49    --  decimal fixed-point).
  50
  51    function Image_Floating_Point
  52      (V    : Long_Long_Float;
  53       Digs : Natural)
  54       return String;
  55    --  Computes the image of V and returns the result according to the rules
  56    --  for image for foating-point types (RM 3.5(33)), where Digs is the value
  57    --  of the Digits attribute for the floating-point type.
  58
  59    procedure Set_Image_Real
  60      (V    : Long_Long_Float;
  61       S    : out String;
  62       P    : in out Natural;
  63       Fore : Natural;
  64       Aft  : Natural;
  65       Exp  : Natural);
  66    --  Sets the image of V starting at S (P + 1), updating P to point to the
  67    --  last character stored, the caller promises that the buffer is large
  68    --  enough and no check is made for this. Constraint_Error will not
  69    --  necessarily be raised if this is violated, since it is perfectly valid
  70    --  to compile this unit with checks off). The Fore, Aft and Exp values
  71    --  can be set to any valid values for the case of use from Text_IO.
  72
  73 end System.Img_Real;