/*
 * tkDList.h --
 *
 * A list is headed by pointers to first and last element. The elements
 * are doubly linked so that an arbitrary element can be removed without
 * a need to traverse the list. New elements can be added to the list
 * before or after an existing element or at the head/tail of the list.
 * A list may be traversed in the forward or backward direction.
 *
 * Copyright (c) 2018 by Gregor Cramer.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

/*
 * Note that this file will not be included in header files, it is the purpose
 * of this file to be included in source files only. Thus we are not using the
 * prefix "Tk_" here for functions, because all the functions have private scope.
 */