⟦409c028e2⟧

E3 Source Code



with Xlbt_Arithmetic;  
use Xlbt_Arithmetic;  
with Xlbt_Basic;  
use Xlbt_Basic;  
with Xlbt_Misc;  
use Xlbt_Misc;  
with Xlbt_Reply;  
use Xlbt_Reply;  
with Xlbt_Request;  
use Xlbt_Request;  
with Xlbt_String;  
use Xlbt_String;

with Xlbip_Get_Reply;  
use Xlbip_Get_Reply;  
with Xlbip_Internal;  
use Xlbip_Internal;  
with Xlbip_Put_Request;  
use Xlbip_Put_Request;

package body Xlbp_Atom is
------------------------------------------------------------------------------
-- X Library Atoms
--
-- Xlbp_Atom - Create and lookup "atoms" (X server string shorthand)
------------------------------------------------------------------------------
-- Copyright 1989 - 1991 by Rational, Santa Clara, California.
-- Copyright 1985 - 1989 by the Massachusetts Institute of Technology
--
--                  All Rights Reserved.
--
-- Permission to use, copy, modify, and distribute this software and its
-- documentation for any purpose and without fee is hereby granted,
-- provided that the above copyright notice(s) appear in all copies and that
-- both that copyright notice(s) and this permission notice appear in
-- supporting documentation, and that the names of MIT or Rational not be
-- used in advertising or publicity pertaining to distribution of the software
-- without specific, written prior permission.
--
-- MIT and Rational disclaim all warranties with regard to this software,
-- including all implied warranties of merchantability and fitness, in no
-- event shall MIT or Rational be liable for any special, indirect or
-- consequential damages or any damages whatsoever resulting from loss of use,
-- data or profits, whether in an action of contract, negligence or other
-- tortious action, arising out of or in connection with the use or performance
-- of this software.
------------------------------------------------------------------------------

--\x0c
    function X_Get_Atom_Name (Display : X_Display;  
                              Atom    : X_Atom) return X_String is  
        Rep  : X_Reply_Contents;  
        Succ : X_Status;  
    begin

----Lock the display.

        Lock_Display (Display);  
        begin

----Send the request.

            Put_X_Get_Atom_Name_Request  
               (Display, (Kind   => Get_Atom_Name,  
                          Length => X_Get_Atom_Name_Request'Size / 32,  
                          Pad    => 0,  
                          Id     => Atom));

----Get the reply.

            Get_Reply (Display => Display,  
                       Code    => Get_Atom_Name,  
                       Reply   => Rep,  
                       Extra   => 0,  
                       Discard => False,  
                       Status  => Succ);

----If reply failed then equate that with atom being undefined.

            if Succ = Failed then  
                Unlock_Display (Display);  
                Sync_Handle (Display); 
                return "";  
            end if;

----Get the string that follows the reply and return that.

            declare  
                Storage : X_String  
                             (1 .. S_Natural (Rep.Get_Atom_Name.Name_Length));  
            begin  
                Get_X_String (Display, Storage);  
                Unlock_Display (Display);  
                Sync_Handle (Display);  
                return Storage;  
            end;

----Catch unexpected exceptions and prevent display lockup.

        exception  
            when others =>  
                Unlock_Display (Display);  
                raise;  
        end;

    end X_Get_Atom_Name;

--\x0c
    function X_Intern_Atom (Display        : X_Display;  
                            Name           : X_String;  
                            Only_If_Exists : Boolean) return X_Atom is  
        N_Bytes : U_Short;  
        Rep     : X_Reply_Contents;  
        Succ    : X_Status;  
    begin

        Lock_Display (Display);  
        begin

            N_Bytes := Name'Length;  
            Put_X_Intern_Atom_Request  
               (Display,  
                (Kind => Intern_Atom,  
                 Length => X_Intern_Atom_Request'Size / 32 + (N_Bytes + 3) / 4,  
                 Pad => 0,  
                 N_Bytes => N_Bytes,  
                 Only_If_Exists => From_Boolean (Only_If_Exists)),  
                S_Natural (N_Bytes));

            Put_X_String (Display, Name);

            Get_Reply (Display => Display,  
                       Code    => Intern_Atom,  
                       Reply   => Rep,  
                       Extra   => 0,  
                       Discard => True,  
                       Status  => Succ);

            if Succ = Failed then  
                Rep.Intern_Atom.Atom := None_X_Atom;  
            end if;

        exception  
            when others =>  
                Unlock_Display (Display);  
                raise;  
        end;

        Unlock_Display (Display);  
        Sync_Handle (Display);  
        return Rep.Intern_Atom.Atom;

    end X_Intern_Atom;

--\x0c
end Xlbp_Atom;
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Rational R1000/400

⟦409c028e2⟧ Ada Source

Derivation

E3 Source Code

E3 Meta Data
