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 --          Copyright (C) 1992-2000 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 2,  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.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, USA.                                                      --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 --  Image for fixed and float types (also used for Float_IO/Fixed_IO output)
  35
  36 package System.Img_Real is
  37 pragma Preelaborate (Img_Real);
  38
  39    function Image_Ordinary_Fixed_Point
  40      (V    : Long_Long_Float;
  41       Aft  : Natural)
  42       return String;
  43    --  Computes the image of V and returns the result according to the rules
  44    --  for image for fixed-point types (RM 3.5(34)), where Aft is the value of
  45    --  the Aft attribute for the fixed-point type. This function is used only
  46    --  for ordinary fixed point (see package System.Img_Dec for handling of
  47    --  decimal fixed-point).
  48
  49    function Image_Floating_Point
  50      (V    : Long_Long_Float;
  51       Digs : Natural)
  52       return String;
  53    --  Computes the image of V and returns the result according to the rules
  54    --  for image for foating-point types (RM 3.5(33)), where Digs is the value
  55    --  of the Digits attribute for the floating-point type.
  56
  57    procedure Set_Image_Real
  58      (V    : Long_Long_Float;
  59       S    : out String;
  60       P    : in out Natural;
  61       Fore : Natural;
  62       Aft  : Natural;
  63       Exp  : Natural);
  64    --  Sets the image of V starting at S (P + 1), updating P to point to the
  65    --  last character stored, the caller promises that the buffer is large
  66    --  enough and no check is made for this. Constraint_Error will not
  67    --  necessarily be raised if this is violated, since it is perfectly valid
  68    --  to compile this unit with checks off). The Fore, Aft and Exp values
  69    --  can be set to any valid values for the case of use from Text_IO.
  70
  71 end System.Img_Real;