Object oriented programming in C.
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Copyright 2009-2014 by the Digital Aggregates Corp., Arvada CO 80001-0587 USA.


This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

As a special exception, if other files instantiate templates or use macros or inline functions from this file, or you compile this file and link it with other works to produce a work based on this file, this file does not by itself cause the resulting work to be covered by the GNU Lesser General Public License. However the source code for this file must still be made available in accordance with the GNU Lesser General Public License.

This exception does not invalidate any other reasons why a work based on this file might be covered by the GNU Lesser General Public License.

Alternative commercial licensing terms are available from the copyright holder. Contact Digital Aggregates Corporation for more information.

This library 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, contact

Free Software Foundation, Inc.
59 Temple Place, Suite 330
Boston MA 02111-1307 USA


This file is part of the Digital Aggregates Corporation Concha package. Concha illustrates how to exploit abstraction, encapsulation, inheritance, and polymorphism in ANSI C. The ideas behind Concha are based on work the author did for one of the Corporation's clients, but is a fully clean room reimplementation and is in fact completely incompatible with that prior commercial intellectual property.

This software is an original work of its authors.

Information regarding Concha can be found here:



Chip Overclock
Digital Aggregates Corporation
3440 Youngfield Street, Suite 209
Wheat Ridge CO 80033 USA