gcc/ada/s-imgbiu.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME COMPONENTS                          --
   4 --                                                                          --
   5 --                       S Y S T E M . I M G _ B I U                        --
   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 --  Contains the routine for computing the image in based format of signed and
  35 --  unsigned integers whose size <= Integer'Size for use by Text_IO.Integer_IO
  36 --  and Text_IO.Modular_IO.
  37
  38 with System.Unsigned_Types;
  39
  40 package System.Img_BIU is
  41 pragma Pure (Img_BIU);
  42
  43    procedure Set_Image_Based_Integer
  44      (V : Integer;
  45       B : Natural;
  46       W : Integer;
  47       S : out String;
  48       P : in out Natural);
  49    --  Sets the signed image of V in based format, using base value B (2..16)
  50    --  starting at S (P + 1), updating P to point to the last character stored.
  51    --  The image includes a leading minus sign if necessary, but no leading
  52    --  spaces unless W is positive, in which case leading spaces are output if
  53    --  necessary to ensure that the output string is no less than W characters
  54    --  long. The caller promises that the buffer is large enough and no check
  55    --  is made for this. Constraint_Error will not necessarily be raised if
  56    --  this is violated, since it is perfectly valid to compile this unit with
  57    --  checks off.
  58
  59    procedure Set_Image_Based_Unsigned
  60      (V : System.Unsigned_Types.Unsigned;
  61       B : Natural;
  62       W : Integer;
  63       S : out String;
  64       P : in out Natural);
  65    --  Sets the unsigned image of V in based format, using base value B (2..16)
  66    --  starting at S (P + 1), updating P to point to the last character stored.
  67    --  The image includes no leading spaces unless W is positive, in which case
  68    --  leading spaces are output if necessary to ensure that the output string
  69    --  is no less than W characters long. The caller promises that the buffer
  70    --  is large 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).
  73
  74 end System.Img_BIU;