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) 1992-2004 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,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- GNAT was originally developed  by the GNAT team at  New York University. --
  23 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  24 --                                                                          --
  25 ------------------------------------------------------------------------------
  26
  27 --  This package provides an Import to the C functions which provide
  28 --  values related to types on the target system. It is only needed for
  29 --  exp_dbug and the elaboration of ttypes.
  30
  31 --  NOTE:  Any changes in this package must be reflected in jgettarg.ads
  32 --  and aa_getta.ads!
  33
  34 --  Note that all these values return sizes of C types with corresponding
  35 --  names. This allows GNAT to define the corresponding Ada types to have
  36 --  the same representation. There is one exception to this: the
  37 --  Wide_Character_Type uses twice the size of a C char, instead of the
  38 --  size of wchar_t.
  39
  40 with Types; use Types;
  41
  42 package Get_Targ is
  43 pragma Preelaborate (Get_Targ);
  44
  45    function Get_Bits_Per_Unit return Pos;
  46    pragma Import (C, Get_Bits_Per_Unit, "get_target_bits_per_unit");
  47
  48    function Get_Bits_Per_Word return Pos;
  49    pragma Import (C, Get_Bits_Per_Word, "get_target_bits_per_word");
  50
  51    function Get_Char_Size return Pos; -- Standard.Character'Size
  52    pragma Import (C, Get_Char_Size, "get_target_char_size");
  53
  54    function Get_Wchar_T_Size return Pos; -- Interfaces.C.wchar_t'Size
  55    pragma Import (C, Get_Wchar_T_Size, "get_target_wchar_t_size");
  56
  57    function Get_Short_Size return Pos; -- Standard.Short_Integer'Size
  58    pragma Import (C, Get_Short_Size, "get_target_short_size");
  59
  60    function Get_Int_Size return Pos; -- Standard.Integer'Size
  61    pragma Import (C, Get_Int_Size, "get_target_int_size");
  62
  63    function Get_Long_Size return Pos; -- Standard.Long_Integer'Size
  64    pragma Import (C, Get_Long_Size, "get_target_long_size");
  65
  66    function Get_Long_Long_Size return Pos; -- Standard.Long_Long_Integer'Size
  67    pragma Import (C, Get_Long_Long_Size, "get_target_long_long_size");
  68
  69    function Get_Float_Size return Pos; -- Standard.Float'Size
  70    pragma Import (C, Get_Float_Size, "get_target_float_size");
  71
  72    function Get_Double_Size return Pos; -- Standard.Long_Float'Size
  73    pragma Import (C, Get_Double_Size, "get_target_double_size");
  74
  75    function Get_Long_Double_Size return Pos; -- Standard.Long_Long_Float'Size
  76    pragma Import (C, Get_Long_Double_Size, "get_target_long_double_size");
  77
  78    function Get_Pointer_Size return Pos; -- System.Address'Size
  79    pragma Import (C, Get_Pointer_Size, "get_target_pointer_size");
  80
  81    function Get_Maximum_Alignment return Pos;
  82    pragma Import (C, Get_Maximum_Alignment, "get_target_maximum_alignment");
  83
  84    function Get_Float_Words_BE return Nat;
  85    pragma Import (C, Get_Float_Words_BE, "get_float_words_be");
  86
  87    function Get_Words_BE return Nat;
  88    pragma Import (C, Get_Words_BE, "get_words_be");
  89
  90    function Get_Bytes_BE return Nat;
  91    pragma Import (C, Get_Bytes_BE, "get_bytes_be");
  92
  93    function Get_Bits_BE return Nat;
  94    pragma Import (C, Get_Bits_BE, "get_bits_be");
  95
  96    function Get_Strict_Alignment return Nat;
  97    pragma Import (C, Get_Strict_Alignment, "get_strict_alignment");
  98
  99    function Get_Max_Unaligned_Field return Pos;
 100    --  Returns the maximum supported size in bits for a field that is
 101    --  not aligned on a storage unit boundary.
 102
 103    function Width_From_Size  (Size : Pos) return Pos;
 104    function Digits_From_Size (Size : Pos) return Pos;
 105    --  Calculate values for 'Width or 'Digits from 'Size
 106
 107 end Get_Targ;