1/*
2 * Copyright (c) 2015, Intel Corporation
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * * Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of Intel Corporation nor the names of its contributors
13 * may be used to endorse or promote products derived from this software
14 * without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** \file
30 * \brief Functions for finding the min/max width of the input required to
31 * match a pattern.
32 */
33
34#ifndef NG_WIDTH_H
35#define NG_WIDTH_H
36
37#include "ue2common.h"
38#include "util/depth.h"
39
40namespace ue2 {
41
42class NGHolder;
43
44/**
45 * \brief Compute the minimum width in bytes of an input that will match the
46 * given graph.
47 */
48depth findMinWidth(const NGHolder &h);
49
50/**
51 * \brief Compute the minimum width in bytes of an input that will match the
52 * given graph, considering only paths activated by the given top.
53 */
54depth findMinWidth(const NGHolder &h, u32 top);
55
56/**
57 * \brief Compute the maximum width in bytes of an input that will match the
58 * given graph.
59 *
60 * If there is no bound on the maximum width, returns infinity.
61 */
62depth findMaxWidth(const NGHolder &h);
63
64/**
65 * \brief Compute the maximum width in bytes of an input that will match the
66 * given graph, considering only paths activated by the given top.
67 *
68 * If there is no bound on the maximum width, returns infinity.
69 */
70depth findMaxWidth(const NGHolder &h, u32 top);
71
72} // namespace ue2
73
74#endif // NG_WIDTH_H
75