------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- G E T _ T A R G -- -- -- -- S p e c -- -- -- -- Copyright (C) 1992-2014, Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 3, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING3. If not, go to -- -- http://www.gnu.org/licenses for a complete copy of the license. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- This package provides an Import to the C functions which provide -- values related to types on the target system. It is only needed for -- exp_dbug and the elaboration of ttypes, via the Set_Targs package. -- It also contains the routine for registering floating-point types. -- NOTE: Any changes in this package must be reflected in aa_getta.adb -- and any other version in the various back ends. -- Note that all these values return sizes of C types with corresponding -- names. This allows GNAT to define the corresponding Ada types to have -- the same representation. There is one exception to this general rule: -- the Wide_Character_Type uses twice the size of a C char, instead of the -- size of wchar_t. with Einfo; use Einfo; with Types; use Types; package Get_Targ is -- Functions returning individual runtime values function Get_Bits_Per_Unit return Pos; -- System.Storage_Unit function Get_Bits_Per_Word return Pos; -- System.Word_Size function Get_Char_Size return Pos; -- Size of Standard.Character function Get_Wchar_T_Size return Pos; -- Size of Interfaces.C.wchar_t function Get_Short_Size return Pos; -- Size of Standard.Short_Integer function Get_Int_Size return Pos; -- Size of Standard.Integer function Get_Long_Size return Pos; -- Size of Standard.Long_Integer function Get_Long_Long_Size return Pos; -- Size of Standard.Long_Long_Integer function Get_Float_Size return Pos; -- Size of Standard.Float function Get_Double_Size return Pos; -- Size of Standard.Long_Float function Get_Long_Double_Size return Pos; -- Size of Standard.Long_Long_Float function Get_Pointer_Size return Pos; -- Size of System.Address function Get_Maximum_Alignment return Pos; -- Maximum supported alignment function Get_Float_Words_BE return Nat; -- Non-zero iff float words big endian function Get_Words_BE return Nat; -- Non-zero iff integer words big endian function Get_Bytes_BE return Nat; -- Non-zero iff bytes big-endian function Get_Bits_BE return Nat; -- Non-zero iff bit order big endian function Get_Strict_Alignment return Nat; -- Non-zero if target requires strict alignent function Get_System_Allocator_Alignment return Nat; -- Alignment guaranteed by malloc falls function Get_Double_Float_Alignment return Nat; -- Alignment required for Long_Float or 0 if no special requirement function Get_Double_Scalar_Alignment return Nat; -- Alignment required for Long_Long_Integer or larger integer types -- or 0 if no special requirement. function Get_Short_Enums return Int; -- Returns non-zero if we are in short enums mode, where foreign convention -- (in particular C and C++) enumeration types will be sized as in Ada, -- using the shortest possibility from 8,16,32 bits, signed or unsigned. -- A zero value means Short_Enums are not in use, and in this case all -- foreign convention enumeration types are given the same size as c int. -- Other subprograms function Get_Max_Unaligned_Field return Pos; -- Returns the maximum supported size in bits for a field that is -- not aligned on a storage unit boundary. function Width_From_Size (Size : Pos) return Pos; function Digits_From_Size (Size : Pos) return Pos; -- Calculate values for 'Width or 'Digits from 'Size type C_String is array (0 .. 255) of aliased Character; pragma Convention (C, C_String); type Register_Type_Proc is access procedure (C_Name : C_String; -- Nul-terminated string with name of type Digs : Natural; -- Digits for floating point, 0 otherwise Complex : Boolean; -- True iff type has real and imaginary parts Count : Natural; -- Number of elements in vector, 0 otherwise Float_Rep : Float_Rep_Kind; -- Representation used for fpt type Precision : Positive; -- Precision of representation in bits Size : Positive; -- Size of representation in bits Alignment : Natural); -- Required alignment in bits pragma Convention (C, Register_Type_Proc); -- Call back procedure for Register_Back_End_Types. This is to be used by -- Create_Standard to create predefined types for all types supported by -- the back end. procedure Register_Back_End_Types (Call_Back : Register_Type_Proc); -- Calls the Call_Back function with information for each supported type end Get_Targ;