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 | |
40 | namespace ue2 { |
41 | |
42 | class NGHolder; |
43 | |
44 | /** |
45 | * \brief Compute the minimum width in bytes of an input that will match the |
46 | * given graph. |
47 | */ |
48 | depth 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 | */ |
54 | depth 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 | */ |
62 | depth 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 | */ |
70 | depth findMaxWidth(const NGHolder &h, u32 top); |
71 | |
72 | } // namespace ue2 |
73 | |
74 | #endif // NG_WIDTH_H |
75 | |