gcc/ada/get_targ.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                             G E T _ T A R G                              --
   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.  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 COPYING3.  If not, go to --
  19 -- http://www.gnu.org/licenses for a complete copy of the license.          --
  20 --                                                                          --
  21 -- GNAT was originally developed  by the GNAT team at  New York University. --
  22 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  23 --                                                                          --
  24 ------------------------------------------------------------------------------
  25
  26 --  This package provides an Import to the C functions which provide
  27 --  values related to types on the target system. It is only needed for
  28 --  exp_dbug and the elaboration of ttypes.
  29
  30 --  NOTE:  Any changes in this package must be reflected in jgettarg.ads
  31 --  and aa_getta.ads!
  32
  33 --  Note that all these values return sizes of C types with corresponding
  34 --  names. This allows GNAT to define the corresponding Ada types to have
  35 --  the same representation. There is one exception to this: the
  36 --  Wide_Character_Type uses twice the size of a C char, instead of the
  37 --  size of wchar_t.
  38
  39 with Types; use Types;
  40
  41 package Get_Targ is
  42    pragma Preelaborate;
  43
  44    function Get_Bits_Per_Unit return Pos;
  45    pragma Import (C, Get_Bits_Per_Unit, "get_target_bits_per_unit");
  46
  47    function Get_Bits_Per_Word return Pos;
  48    pragma Import (C, Get_Bits_Per_Word, "get_target_bits_per_word");
  49
  50    function Get_Char_Size return Pos; -- Standard.Character'Size
  51    pragma Import (C, Get_Char_Size, "get_target_char_size");
  52
  53    function Get_Wchar_T_Size return Pos; -- Interfaces.C.wchar_t'Size
  54    pragma Import (C, Get_Wchar_T_Size, "get_target_wchar_t_size");
  55
  56    function Get_Short_Size return Pos; -- Standard.Short_Integer'Size
  57    pragma Import (C, Get_Short_Size, "get_target_short_size");
  58
  59    function Get_Int_Size return Pos; -- Standard.Integer'Size
  60    pragma Import (C, Get_Int_Size, "get_target_int_size");
  61
  62    function Get_Long_Size return Pos; -- Standard.Long_Integer'Size
  63    pragma Import (C, Get_Long_Size, "get_target_long_size");
  64
  65    function Get_Long_Long_Size return Pos; -- Standard.Long_Long_Integer'Size
  66    pragma Import (C, Get_Long_Long_Size, "get_target_long_long_size");
  67
  68    function Get_Float_Size return Pos; -- Standard.Float'Size
  69    pragma Import (C, Get_Float_Size, "get_target_float_size");
  70
  71    function Get_Double_Size return Pos; -- Standard.Long_Float'Size
  72    pragma Import (C, Get_Double_Size, "get_target_double_size");
  73
  74    function Get_Long_Double_Size return Pos; -- Standard.Long_Long_Float'Size
  75    pragma Import (C, Get_Long_Double_Size, "get_target_long_double_size");
  76
  77    function Get_Pointer_Size return Pos; -- System.Address'Size
  78    pragma Import (C, Get_Pointer_Size, "get_target_pointer_size");
  79
  80    function Get_Maximum_Alignment return Pos;
  81    pragma Import (C, Get_Maximum_Alignment, "get_target_maximum_alignment");
  82
  83    function Get_Float_Words_BE return Nat;
  84    pragma Import (C, Get_Float_Words_BE, "get_float_words_be");
  85
  86    function Get_Words_BE return Nat;
  87    pragma Import (C, Get_Words_BE, "get_words_be");
  88
  89    function Get_Bytes_BE return Nat;
  90    pragma Import (C, Get_Bytes_BE, "get_bytes_be");
  91
  92    function Get_Bits_BE return Nat;
  93    pragma Import (C, Get_Bits_BE, "get_bits_be");
  94
  95    function Get_Strict_Alignment return Nat;
  96    pragma Import (C, Get_Strict_Alignment, "get_target_strict_alignment");
  97
  98    function Get_Double_Float_Alignment return Nat;
  99    pragma Import (C, Get_Double_Float_Alignment,
 100                   "get_target_double_float_alignment");
 101
 102    function Get_Double_Scalar_Alignment return Nat;
 103    pragma Import (C, Get_Double_Scalar_Alignment,
 104                   "get_target_double_scalar_alignment");
 105
 106    function Get_Max_Unaligned_Field return Pos;
 107    --  Returns the maximum supported size in bits for a field that is
 108    --  not aligned on a storage unit boundary.
 109
 110    function Width_From_Size  (Size : Pos) return Pos;
 111    function Digits_From_Size (Size : Pos) return Pos;
 112    --  Calculate values for 'Width or 'Digits from 'Size
 113
 114 end Get_Targ;