63 lines
2.2 KiB
C
63 lines
2.2 KiB
C
/* $NetBSD: graph2.h,v 1.1 2009/08/15 16:21:05 joerg Exp $ */
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/*-
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* Copyright (c) 2009 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Joerg Sonnenberger.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Implementation of common 2-graph routines:
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* - build a 2-graph with hash-pairs as edges
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* - check a 2-graph for acyclicness and compute an output order
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*/
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struct vertex2 {
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uint32_t l_edge, r_edge;
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};
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struct edge2 {
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uint32_t left, right;
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uint32_t l_prev, l_next;
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uint32_t r_prev, r_next;
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};
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struct graph2 {
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struct vertex2 *verts;
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struct edge2 *edges;
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uint32_t output_index;
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uint32_t *output_order;
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uint8_t *visited;
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uint32_t e, v;
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};
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void graph2_setup(struct graph2 *, uint32_t, uint32_t);
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void graph2_free(struct graph2 *);
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int graph2_hash(struct nbperf *, struct graph2 *);
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int graph2_output_order(struct graph2 *graph);
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