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 Anchored acyclic graph -> DFA analysis.
31 */
32 #include "ng_anchored_acyclic.h"
33
34 #include "ng_holder.h"
35 #include "ng_reports.h"
36 #include "ng_util.h"
37 #include "ue2common.h"
38 #include "rose/rose_build.h"
39 #include "util/compile_context.h"
40
41 namespace ue2 {
42
splitOffAnchoredAcyclic(RoseBuild & rose,const NGHolder & h,const CompileContext & cc)43 bool splitOffAnchoredAcyclic(RoseBuild &rose, const NGHolder &h,
44 const CompileContext &cc) {
45 if (!cc.grey.allowAnchoredAcyclic) {
46 return false;
47 }
48
49 if (!isAnchored(h)) {
50 DEBUG_PRINTF("fail, not anchored\n");
51 return false;
52 }
53
54 if (!isAcyclic(h)) {
55 DEBUG_PRINTF("fail, not acyclic\n");
56 return false;
57 }
58
59 if (rose.addAnchoredAcyclic(h)) {
60 return true;
61 } else {
62 DEBUG_PRINTF("failed to add anchored nfa\n");
63 return false;
64 }
65 }
66
67 } // namespace ue2
68