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comparison Core/HttpServer/StringMatcher.cpp @ 3398:4acd1431e603

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new classes: StringMatcher and MultipartStreamReader
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 07 Jun 2019 13:36:43 +0200
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children 630fc934597f
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3397:9019279dbfd7 3398:4acd1431e603
1 /**
2 * Orthanc - A Lightweight, RESTful DICOM Store
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
6 *
7 * This program is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation, either version 3 of the
10 * License, or (at your option) any later version.
11 *
12 * In addition, as a special exception, the copyright holders of this
13 * program give permission to link the code of its release with the
14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
15 * that use the same license as the "OpenSSL" library), and distribute
16 * the linked executables. You must obey the GNU General Public License
17 * in all respects for all of the code used other than "OpenSSL". If you
18 * modify file(s) with this exception, you may extend this exception to
19 * your version of the file(s), but you are not obligated to do so. If
20 * you do not wish to do so, delete this exception statement from your
21 * version. If you delete this exception statement from all source files
22 * in the program, then also delete it here.
23 *
24 * This program is distributed in the hope that it will be useful, but
25 * WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27 * General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
31 **/
32
33
34 #include "../PrecompiledHeaders.h"
35 #include "StringMatcher.h"
36
37 #include "../OrthancException.h"
38
39 #include <boost/algorithm/searching/boyer_moore.hpp>
40 //#include <boost/algorithm/searching/boyer_moore_horspool.hpp>
41 //#include <boost/algorithm/searching/knuth_morris_pratt.hpp>
42
43 namespace Orthanc
44 {
45 class StringMatcher::Search
46 {
47 private:
48 typedef boost::algorithm::boyer_moore<Iterator> Algorithm;
49 //typedef boost::algorithm::boyer_moore_horspool<std::string::const_iterator> Algorithm;
50
51 Algorithm algorithm_;
52
53 public:
54 Search(const std::string& pattern) :
55 algorithm_(pattern.begin(), pattern.end())
56 {
57 }
58
59 Iterator Apply(Iterator start,
60 Iterator end) const
61 {
62 #if BOOST_VERSION >= 106200
63 return algorithm_(start, end).first;
64 #else
65 return algorithm_(start, end);
66 #endif
67 }
68 };
69
70
71 StringMatcher::StringMatcher(const std::string& pattern) :
72 search_(new Search(pattern)),
73 pattern_(pattern),
74 valid_(false)
75 {
76 }
77
78
79 bool StringMatcher::Apply(Iterator start,
80 Iterator end)
81 {
82 assert(search_.get() != NULL);
83 matchBegin_ = search_->Apply(start, end);
84
85 if (matchBegin_ == end)
86 {
87 valid_ = false;
88 }
89 else
90 {
91 matchEnd_ = matchBegin_ + pattern_.size();
92 assert(matchEnd_ <= end);
93 valid_ = true;
94 }
95
96 return valid_;
97 }
98
99
100 StringMatcher::Iterator StringMatcher::GetMatchBegin() const
101 {
102 if (valid_)
103 {
104 return matchBegin_;
105 }
106 else
107 {
108 throw OrthancException(ErrorCode_BadSequenceOfCalls);
109 }
110 }
111
112
113 StringMatcher::Iterator StringMatcher::GetMatchEnd() const
114 {
115 if (valid_)
116 {
117 return matchEnd_;
118 }
119 else
120 {
121 throw OrthancException(ErrorCode_BadSequenceOfCalls);
122 }
123 }
124
125
126 const char* StringMatcher::GetPointerBegin() const
127 {
128 return &GetMatchBegin()[0];
129 }
130
131
132 const char* StringMatcher::GetPointerEnd() const
133 {
134 return &GetMatchEnd()[0];
135 }
136 }