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 | #ifndef ROSE_BUILD_WIDTH_H |
30 | #define ROSE_BUILD_WIDTH_H |
31 | |
32 | #include "rose_build_impl.h" |
33 | #include "ue2common.h" |
34 | |
35 | namespace ue2 { |
36 | |
37 | class RoseBuildImpl; |
38 | |
39 | /* returns a lower bound on the minimum number of bytes required for match to be |
40 | * raised up to the user which requires the given literal table to be used |
41 | * |
42 | * returns ROSE_BOUND_INF if the table can never produce matches */ |
43 | u32 findMinWidth(const RoseBuildImpl &tbi, enum rose_literal_table table); |
44 | |
45 | /* returns an upper bound on the maximum length of a buffer that can result in |
46 | * matches. If there are any patterns which are not bianchored (start and end |
47 | * anchored), then there is no such limit and ROSE_BOUND_INF is returned. |
48 | */ |
49 | u32 findMaxBAWidth(const RoseBuildImpl &tbi); |
50 | |
51 | /* returns an upper bound on the maximum length of a buffer that can result in |
52 | * matches and requires that the given table to be used. If there are any |
53 | * patterns which are not bianchored (start and end anchored), then there is no |
54 | * such limit and ROSE_BOUND_INF is returned. |
55 | */ |
56 | u32 findMaxBAWidth(const RoseBuildImpl &tbi, enum rose_literal_table table); |
57 | |
58 | /** |
59 | * Note: there is no function for determining the min width of the whole rose |
60 | * as this is more easily done by the NG layer which has access to the full |
61 | * nfagraphs before they are chopped into little pieces. |
62 | */ |
63 | |
64 | } // namespace ue2 |
65 | |
66 | #endif |
67 | |