+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT RUN-TIME COMPONENTS --
--- --
--- I N T E R F A C E S . C P P --
--- --
--- B o d y --
--- --
--- $Revision: 1.1.16.1 $
--- --
--- Copyright (C) 2000, 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 2, 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 COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
--- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
--- --
--- GNAT was originally developed by the GNAT team at New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
--- This is the OpenVMS/Alpha DEC C++ (cxx) version of this package.
-
-with Ada.Tags; use Ada.Tags;
-with System; use System;
-with System.Storage_Elements; use System.Storage_Elements;
-with Unchecked_Conversion;
-
-package body Interfaces.CPP is
-
- subtype Cstring is String (Positive);
- type Cstring_Ptr is access all Cstring;
- type Tag_Table is array (Natural range <>) of Vtable_Ptr;
- pragma Suppress_Initialization (Tag_Table);
-
- type Type_Specific_Data is record
- Idepth : Natural;
- Expanded_Name : Cstring_Ptr;
- External_Tag : Cstring_Ptr;
- HT_Link : Tag;
- Ancestor_Tags : Tag_Table (Natural);
- end record;
-
- type Vtable_Entry is record
- Pfn : System.Address;
- end record;
-
- type Type_Specific_Data_Ptr is access all Type_Specific_Data;
- type Vtable_Entry_Array is array (Positive range <>) of Vtable_Entry;
-
- type VTable is record
- Prims_Ptr : Vtable_Entry_Array (Positive);
- TSD : Type_Specific_Data_Ptr;
- -- Location of TSD is unknown so it got moved here to be out of the
- -- way of Prims_Ptr. Find it later. ???
- end record;
-
- --------------------------------------------------------
- -- Unchecked Conversions for Tag, Vtable_Ptr, and TSD --
- --------------------------------------------------------
-
- function To_Type_Specific_Data_Ptr is
- new Unchecked_Conversion (Address, Type_Specific_Data_Ptr);
-
- function To_Address is new Unchecked_Conversion (Vtable_Ptr, Address);
- function To_Address is
- new Unchecked_Conversion (Type_Specific_Data_Ptr, Address);
-
- function To_Vtable_Ptr is new Unchecked_Conversion (Tag, Vtable_Ptr);
- function To_Tag is new Unchecked_Conversion (Vtable_Ptr, Tag);
-
- ---------------------------------------------
- -- Unchecked Conversions for String Fields --
- ---------------------------------------------
-
- function To_Cstring_Ptr is
- new Unchecked_Conversion (Address, Cstring_Ptr);
-
- function To_Address is
- new Unchecked_Conversion (Cstring_Ptr, Address);
-
- -----------------------
- -- Local Subprograms --
- -----------------------
-
- function Length (Str : Cstring_Ptr) return Natural;
- -- Length of string represented by the given pointer (treating the
- -- string as a C-style string, which is Nul terminated).
-
- --------------------
- -- Displaced_This --
- --------------------
-
- function Displaced_This
- (Current_This : System.Address;
- Vptr : Vtable_Ptr;
- Position : Positive)
- return System.Address
- is
- begin
- return Current_This;
--- + Storage_Offset (Vptr.Prims_Ptr (Position).Delta1);
- end Displaced_This;
-
- -----------------------
- -- CPP_CW_Membership --
- -----------------------
-
- function CPP_CW_Membership
- (Obj_Tag : Vtable_Ptr;
- Typ_Tag : Vtable_Ptr)
- return Boolean
- is
- Pos : constant Integer := Obj_Tag.TSD.Idepth - Typ_Tag.TSD.Idepth;
- begin
- return Pos >= 0 and then Obj_Tag.TSD.Ancestor_Tags (Pos) = Typ_Tag;
- end CPP_CW_Membership;
-
- ---------------------------
- -- CPP_Get_Expanded_Name --
- ---------------------------
-
- function CPP_Get_Expanded_Name (T : Vtable_Ptr) return Address is
- begin
- return To_Address (T.TSD.Expanded_Name);
- end CPP_Get_Expanded_Name;
-
- --------------------------
- -- CPP_Get_External_Tag --
- --------------------------
-
- function CPP_Get_External_Tag (T : Vtable_Ptr) return Address is
- begin
- return To_Address (T.TSD.External_Tag);
- end CPP_Get_External_Tag;
-
- -------------------------------
- -- CPP_Get_Inheritance_Depth --
- -------------------------------
-
- function CPP_Get_Inheritance_Depth (T : Vtable_Ptr) return Natural is
- begin
- return T.TSD.Idepth;
- end CPP_Get_Inheritance_Depth;
-
- -------------------------
- -- CPP_Get_Prim_Op_Address --
- -------------------------
-
- function CPP_Get_Prim_Op_Address
- (T : Vtable_Ptr;
- Position : Positive)
- return Address is
- begin
- return T.Prims_Ptr (Position).Pfn;
- end CPP_Get_Prim_Op_Address;
-
- -------------------------------
- -- CPP_Get_Remotely_Callable --
- -------------------------------
-
- function CPP_Get_Remotely_Callable (T : Vtable_Ptr) return Boolean is
- begin
- return True;
- end CPP_Get_Remotely_Callable;
-
- -----------------
- -- CPP_Get_TSD --
- -----------------
-
- function CPP_Get_TSD (T : Vtable_Ptr) return Address is
- begin
- return To_Address (T.TSD);
- end CPP_Get_TSD;
-
- --------------------
- -- CPP_Inherit_DT --
- --------------------
-
- procedure CPP_Inherit_DT
- (Old_T : Vtable_Ptr;
- New_T : Vtable_Ptr;
- Entry_Count : Natural)
- is
- begin
- if Old_T /= null then
- New_T.Prims_Ptr (1 .. Entry_Count)
- := Old_T.Prims_Ptr (1 .. Entry_Count);
- end if;
- end CPP_Inherit_DT;
-
- ---------------------
- -- CPP_Inherit_TSD --
- ---------------------
-
- procedure CPP_Inherit_TSD
- (Old_TSD : Address;
- New_Tag : Vtable_Ptr)
- is
- TSD : constant Type_Specific_Data_Ptr
- := To_Type_Specific_Data_Ptr (Old_TSD);
-
- New_TSD : Type_Specific_Data renames New_Tag.TSD.all;
-
- begin
- if TSD /= null then
- New_TSD.Idepth := TSD.Idepth + 1;
- New_TSD.Ancestor_Tags (1 .. New_TSD.Idepth)
- := TSD.Ancestor_Tags (0 .. TSD.Idepth);
- else
- New_TSD.Idepth := 0;
- end if;
-
- New_TSD.Ancestor_Tags (0) := New_Tag;
- end CPP_Inherit_TSD;
-
- ---------------------------
- -- CPP_Set_Expanded_Name --
- ---------------------------
-
- procedure CPP_Set_Expanded_Name (T : Vtable_Ptr; Value : Address) is
- begin
- T.TSD.Expanded_Name := To_Cstring_Ptr (Value);
- end CPP_Set_Expanded_Name;
-
- --------------------------
- -- CPP_Set_External_Tag --
- --------------------------
-
- procedure CPP_Set_External_Tag (T : Vtable_Ptr; Value : Address) is
- begin
- T.TSD.External_Tag := To_Cstring_Ptr (Value);
- end CPP_Set_External_Tag;
-
- -------------------------------
- -- CPP_Set_Inheritance_Depth --
- -------------------------------
-
- procedure CPP_Set_Inheritance_Depth
- (T : Vtable_Ptr;
- Value : Natural)
- is
- begin
- T.TSD.Idepth := Value;
- end CPP_Set_Inheritance_Depth;
-
- -----------------------------
- -- CPP_Set_Prim_Op_Address --
- -----------------------------
-
- procedure CPP_Set_Prim_Op_Address
- (T : Vtable_Ptr;
- Position : Positive;
- Value : Address)
- is
- begin
- T.Prims_Ptr (Position).Pfn := Value;
- end CPP_Set_Prim_Op_Address;
-
- -------------------------------
- -- CPP_Set_Remotely_Callable --
- -------------------------------
-
- procedure CPP_Set_Remotely_Callable (T : Vtable_Ptr; Value : Boolean) is
- begin
- null;
- end CPP_Set_Remotely_Callable;
-
- -----------------
- -- CPP_Set_TSD --
- -----------------
-
- procedure CPP_Set_TSD (T : Vtable_Ptr; Value : Address) is
- begin
- T.TSD := To_Type_Specific_Data_Ptr (Value);
- end CPP_Set_TSD;
-
- -------------------
- -- Expanded_Name --
- -------------------
-
- function Expanded_Name (T : Vtable_Ptr) return String is
- Result : Cstring_Ptr := T.TSD.Expanded_Name;
-
- begin
- return Result (1 .. Length (Result));
- end Expanded_Name;
-
- ------------------
- -- External_Tag --
- ------------------
-
- function External_Tag (T : Vtable_Ptr) return String is
- Result : Cstring_Ptr := T.TSD.External_Tag;
-
- begin
- return Result (1 .. Length (Result));
- end External_Tag;
-
- ------------
- -- Length --
- ------------
-
- function Length (Str : Cstring_Ptr) return Natural is
- Len : Integer := 1;
-
- begin
- while Str (Len) /= ASCII.Nul loop
- Len := Len + 1;
- end loop;
-
- return Len - 1;
- end Length;
-
- procedure CPP_Set_RC_Offset (T : Vtable_Ptr; Value : SSE.Storage_Offset) is
- begin
- null;
- end CPP_Set_RC_Offset;
-
- function CPP_Get_RC_Offset (T : Vtable_Ptr) return SSE.Storage_Offset is
- begin
- return 0;
- end CPP_Get_RC_Offset;
-end Interfaces.CPP;
projects / msp430-gcc.git / blobdiff