New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45955 138bc75d-0d04-0410-961f-82ee72b054a4

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                     I N T E R F A C E S . O S 2 L I B                    --
+--                                                                          --
+--                                  S p e c                                 --
+--                                                                          --
+--                             $Revision: 1.14 $                            --
+--                                                                          --
+--          Copyright (C) 1993-1997 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. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package (and children) provide interface definitions to the standard
+--  OS/2 Library. They are merely a translation of the various <bse*.h> files.
+
+--  It is intended that higher level interfaces (with better names, and
+--  stronger typing!) be built on top of this one for Ada (i.e. clean)
+--  programming.
+
+--  We have chosen to keep names, types, etc.  as close as possible to the
+--  C definition to provide easier reference to the documentation. The main
+--  exception is when a formal and its type (in C) differed only by the case
+--  of letters (like in HMUX hmux). In this case, we have prepended "F_" to
+--  the formal (i.e. F_hmux : HMUX).
+
+with Interfaces.C;
+with Interfaces.C.Strings;
+with System;
+
+package Interfaces.OS2Lib is
+pragma Preelaborate (OS2Lib);
+
+   package IC  renames Interfaces.C;
+   package ICS renames Interfaces.C.Strings;
+
+   -------------------
+   -- General Types --
+   -------------------
+
+   type    APIRET   is new IC.unsigned_long;
+   type    APIRET16 is new IC.unsigned_short;
+   subtype APIRET32 is     APIRET;
+
+   subtype PSZ    is ICS.chars_ptr;
+   subtype PCHAR  is ICS.chars_ptr;
+   subtype PVOID  is System.Address;
+   type    PPVOID is access all PVOID;
+
+   type BOOL32 is new IC.unsigned_long;
+   False32 : constant BOOL32 := 0;
+   True32  : constant BOOL32 := 1;
+
+   type UCHAR   is new IC.unsigned_char;
+   type USHORT  is new IC.unsigned_short;
+   type ULONG   is new IC.unsigned_long;
+   type PULONG  is access all ULONG;
+
+   --  Coprocessor stack register element.
+
+   type FPREG is record
+      losig             : ULONG;        --  Low 32-bits of the mantissa
+      hisig             : ULONG;        --  High 32-bits of the mantissa
+      signexp           : USHORT;       --  Sign and exponent
+   end record;
+   pragma Convention (C, FPREG);
+
+   type AULONG is array (IC.size_t range <>) of ULONG;
+   type AFPREG is array (IC.size_t range <>) of FPREG;
+
+   type LHANDLE is new IC.unsigned_long;
+
+   NULLHANDLE : constant := 0;
+
+   ---------------------
+   -- Time Management --
+   ---------------------
+
+   function DosSleep (How_long : ULONG) return APIRET;
+   pragma Import (C, DosSleep, "DosSleep");
+
+   type DATETIME is record
+      hours      : UCHAR;
+      minutes    : UCHAR;
+      seconds    : UCHAR;
+      hundredths : UCHAR;
+      day        : UCHAR;
+      month      : UCHAR;
+      year       : USHORT;
+      timezone   : IC.short;
+      weekday    : UCHAR;
+   end record;
+
+   type PDATETIME is access all DATETIME;
+
+   function DosGetDateTime (pdt : PDATETIME) return APIRET;
+   pragma Import (C, DosGetDateTime, "DosGetDateTime");
+
+   function DosSetDateTime (pdt : PDATETIME) return APIRET;
+   pragma Import (C, DosSetDateTime, "DosSetDateTime");
+
+   ----------------------------
+   -- Miscelleneous Features --
+   ----------------------------
+
+   --  Features which do not fit any child
+
+   function DosBeep (Freq : ULONG; Dur : ULONG) return APIRET;
+   pragma Import (C, DosBeep, "DosBeep");
+
+   procedure Must_Not_Fail (Return_Code : OS2Lib.APIRET);
+   pragma Inline (Must_Not_Fail);
+   --  Many OS/2 functions return APIRET and are not supposed to fail. In C
+   --  style, these would be called as procedures, disregarding the returned
+   --  value. This procedure can be used to achieve the same effect with a
+   --  call of the form: Must_Not_Fail (Some_OS2_Function (...));
+
+   procedure Sem_Must_Not_Fail (Return_Code : OS2Lib.APIRET);
+   pragma Inline (Sem_Must_Not_Fail);
+   --  Similar to Must_Not_Fail, but used in the case of DosPostEventSem,
+   --  where the "error" code ERROR_ALREADY_POSTED is not really an error.
+
+end Interfaces.OS2Lib;