File : gnatcom-guid.adb
------------------------------------------------------------------------------
-- --
-- GNATCOM - Ada 95 COM/DCOM/COM+ Development Framework and Tools --
-- --
-- G N A T C O M . G U I D --
-- --
-- B o d y --
-- --
-- $Revision: 1.3 $
-- --
-- Copyright (C) 1999, 2000, 2001 David Botton --
-- --
-- This 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. It is distributed in the hope that it will be useful, but WITHOUT --
-- 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 this; 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. --
-- --
-- More information about GNATCOM and the most current public version can --
-- be located on the web at http://www.adapower.com/gnatcom --
-- --
-- Support for GNATCOM is available from Ada Core Technologies, Inc. --
-- --
-- In the U.S., contact Ada Core Technologies at: --
-- Tel: +1 (212) 620 7300 ext 117 --
-- Fax: +1 (212) 807 0162 --
-- Email: sales@gnat.com --
-- --
-- In Europe and elsewhere, contact ACT Europe at: --
-- Tel: +33 1 49 70 67 16 --
-- Fax: +33 1 49 70 05 52 --
-- Email: sales@act-europe.fr --
------------------------------------------------------------------------------
with Ada.Characters.Handling;
with Ada.Unchecked_Conversion;
with Interfaces.C;
with System;
with GNATCOM.Errors;
package body GNATCOM.GUID is
package C renames Interfaces.C;
function CLSIDFromString
(lpsz : GNATCOM.Types.LPWSTR;
pclsid : GNATCOM.Types.Pointer_To_GUID)
return GNATCOM.Types.HRESULT;
pragma Import (StdCall, CLSIDFromString, "CLSIDFromString");
function StringFromCLSID
(rclsid : GNATCOM.Types.Pointer_To_GUID;
lplpsz : GNATCOM.Types.Pointer_To_LPWSTR)
return GNATCOM.Types.HRESULT;
pragma Import (StdCall, StringFromCLSID, "StringFromCLSID");
procedure CoTaskMemFree (pv : GNATCOM.Types.Pointer_To_Void);
pragma Import (StdCall, CoTaskMemFree, "CoTaskMemFree");
function CoCreateGuid (pguid : GNATCOM.Types.Pointer_To_GUID)
return GNATCOM.Types.HRESULT;
pragma Import (StdCall, CoCreateGuid, "CoCreateGuid");
-----------------
-- Create_GUID --
-----------------
function Create_GUID return GNATCOM.Types.GUID is
use type GNATCOM.Types.HRESULT;
use GNATCOM.Errors;
New_GUID : aliased GNATCOM.Types.GUID;
begin
if FAILED (CoCreateGuid (New_GUID'Unchecked_Access)) then
raise GUID_Error;
end if;
return New_GUID;
end Create_GUID;
-------------
-- To_GUID --
-------------
function To_GUID (From : String) return GNATCOM.Types.GUID is
use type GNATCOM.Types.HRESULT;
use GNATCOM.Errors;
function To_LPWSTR is
new Ada.Unchecked_Conversion (System.Address, GNATCOM.Types.LPWSTR);
ID_String : C.wchar_array :=
C.To_C (Ada.Characters.Handling.To_Wide_String (From));
ID : aliased GNATCOM.Types.GUID;
begin
if FAILED (CLSIDFromString (To_LPWSTR (ID_String'Address),
ID'Unchecked_Access))
then
raise GUID_Error;
end if;
return ID;
end To_GUID;
---------------
-- To_String --
---------------
function To_String (From : GNATCOM.Types.GUID) return String is
use type GNATCOM.Types.HRESULT;
use type GNATCOM.Types.BSTR;
use GNATCOM.Errors;
Ref_GUID : aliased GNATCOM.Types.GUID := From;
GUID_String : aliased GNATCOM.Types.LPWSTR;
begin
if SUCCEEDED (StringFromCLSID (Ref_GUID'Unchecked_Access,
GUID_String'Unchecked_Access))
then
declare
Ada_GUID_String : String := GNATCOM.Types.To_Ada (GUID_String);
begin
CoTaskMemFree (GUID_String.all'Address);
return Ada_GUID_String;
end;
else
raise GUID_Error;
end if;
end To_String;
end GNATCOM.GUID;