create or replace package blob_wrapper as

/*
   Package blob_wrapper (spec.plsql and body.plsql)

   Copyright (C) René Nyffenegger

   This source code is provided 'as-is', without any express or implied
   warranty. In no event will the author be held liable for any damages
   arising from the use of this software.

   Permission is granted to anyone to use this software for any purpose,
   including commercial applications, and to alter it and redistribute it
   freely, subject to the following restrictions:

   1. The origin of this source code must not be misrepresented; you must not
      claim that you wrote the original source code. If you use this source code
      in a product, an acknowledgment in the product documentation would be
      appreciated but is not required.

   2. Altered source versions must be plainly marked as such, and must not be
      misrepresented as being the original source code.

   3. This notice may not be removed or altered from any source distribution.

   René Nyffenegger rene.nyffenegger@adp-gmbh.ch

*/

  procedure   to_file(dir in varchar2, file in varchar2, lob in blob);
  procedure   to_file(filepath in varchar2             , lob in blob);

  function  from_file(dir in varchar2, file in varchar2) return blob;
  procedure from_file(dir in varchar2, file in varchar2, b in out blob);

  function  substr(b in blob, length_ in number, start_ in number, chunk_size in number := 30000) return blob;

end blob_wrapper;
/