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93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
/*
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* Graph data structure.
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*
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* --
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* Copyright (C) 2016 Cumulus Networks, Inc.
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* GNU Zebra is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Zebra; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#ifndef _ZEBRA_COMMAND_GRAPH_H
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#define _ZEBRA_COMMAND_GRAPH_H
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#include "vector.h"
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struct graph
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{
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vector nodes;
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};
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struct graph_node
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{
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vector from; // nodes which have edges to this node
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vector to; // nodes which this node has edges to
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void *data; // node data
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void (*del) (void *data); // deletion callback
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};
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struct graph *
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graph_new (void);
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/**
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* Creates a new node.
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*
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* @struct graph the graph this node exists in
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* @param[in] data this node's data
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* @param[in] del data deletion callback
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* @return the new node
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*/
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struct graph_node *
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graph_new_node (struct graph *graph, void *data, void (*del) (void*));
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/**
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* Deletes a node.
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*
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* Before deletion, this function removes all edges to and from this node from
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* any neighbor nodes.
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*
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* If *data and *del are non-null, the following call is made:
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* (*node->del) (node->data);
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*
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* @param[out] node pointer to node to delete
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*/
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void
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graph_delete_node (struct graph *graph, struct graph_node *node);
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/**
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* Makes a directed edge between two nodes.
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*
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* @param[in] from
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* @param[in] to
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* @return to
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*/
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struct graph_node *
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graph_add_edge (struct graph_node *from, struct graph_node *to);
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/**
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* Deletes a graph.
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*
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* Calls graph_delete_node on each node before freeing the graph struct itself.
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*
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* @param graph the graph to delete
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*/
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void
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graph_delete_graph (struct graph *graph);
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#endif /* _ZEBRA_COMMAND_GRAPH_H */
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