walk.c File Reference

#include "tree.h"

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Functions
void	treeWalk (Tree this, TreeAction action)

Detailed Description

Author

Georg Hopp

Copyright

Copyright © 2012 Georg Hopp

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file walk.c.

Function Documentation

void treeWalk	(	Tree	this,
		TreeAction	action
	)

Definition at line 26 of file walk.c.

References TREE_LEFT, TREE_PARENT, and TREE_RIGHT.

Referenced by hashEach(), and main().

{
    Tree previous = this;
    Tree node     = this;
    int  depth    = 1;

    while (NULL != node) {
        if (previous == TREE_RIGHT(node)) {
            previous = node;
            node     = node->parent;
            depth--;
            continue;
        }

        if (NULL == TREE_LEFT(node) || previous == TREE_LEFT(node)) {
            action(node->data, depth);
            previous = node;

            if (NULL != TREE_RIGHT(node)) {
                node = TREE_RIGHT(node);
                depth++;
            } else {
                node = TREE_PARENT(node);
                depth--;
            }
        } else {
            previous = node;
            node     = TREE_LEFT(node);
            depth++;
        }
    }
}

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