File : zlib-streams-extra.adb


------------------------------------------------------------------------------

--                         ADAGIO - ADALID - AENEA.                         --

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--                            Copyright (C) 2003                            --

--                                 A. Mosteo.                               --

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--  Authors: A. Mosteo. (adagio@mosteo.com)                                 --

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--  $Id: zlib-streams-extra.adb,v 1.5 2004/01/21 21:05:48 Jano Exp $


with Adagio.Trace;
use  Adagio;

with Ada.Unchecked_deallocation;

package body Zlib.Streams.Extra is

   ------------------------------------------------------------------------

   -- Close_abort                                                        --

   ------------------------------------------------------------------------

   -- Closes a [decompressing] stream without flushing it

   procedure Close_abort (Stream : in out Stream_type)
   is
      procedure Free is new Ada.Unchecked_Deallocation
         (Stream_Element_Array, Buffer_Access);
   begin
      if 
            Stream.Mode = Out_Stream or 
            Stream.Mode = Duplex 
      then
         begin
            Flush (Stream, Finish);
         exception
            when E : Zlib_error =>
               Trace.Log ("Zlib.Streams.Close_abort [flush ok]: " & 
                  Trace.Report (E));
         end;
         begin
            Close (Stream.Writer);
         exception
            when E : Zlib_error =>
               Trace.Log ("Zlib.Streams.Close_abort [close ok]: " & 
                  Trace.Report (E));
         end;
      end if;
            
      if 
         Stream.Mode = In_Stream or 
         Stream.Mode = Duplex 
      then
         begin
            Close (Stream.Reader);
         exception
            when E : Zlib_error =>
               Trace.Log (
                  "Zlib.Streams.Close_abort [ok]: " & Trace.Report (E));
         end;
         Free  (Stream.Buffer);
      end if;
   end Close_abort;

end Zlib.Streams.Extra;