gcc/ada/s-imgrea.ads

   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
  34 package 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
  76 end System.Img_Real;