Mercurial > hg > orthanc

annotate Core/HttpServer/StringMatcher.cpp @ 3640:94f4a18a79cc

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upgrade to year 2020
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 31 Jan 2020 17:14:59 +0100
parents 8de071691d13
children
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
3640
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU General Public License as
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9 * published by the Free Software Foundation, either version 3 of the
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10 * License, or (at your option) any later version.
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11 *
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12 * In addition, as a special exception, the copyright holders of this
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13 * program give permission to link the code of its release with the
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14 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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15 * that use the same license as the "OpenSSL" library), and distribute
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16 * the linked executables. You must obey the GNU General Public License
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17 * in all respects for all of the code used other than "OpenSSL". If you
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18 * modify file(s) with this exception, you may extend this exception to
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19 * your version of the file(s), but you are not obligated to do so. If
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20 * you do not wish to do so, delete this exception statement from your
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21 * version. If you delete this exception statement from all source files
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22 * in the program, then also delete it here.
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23 *
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24 * This program is distributed in the hope that it will be useful, but
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25 * WITHOUT ANY WARRANTY; without even the implied warranty of
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26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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27 * General Public License for more details.
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28 *
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29 * You should have received a copy of the GNU General Public License
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30 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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31 **/
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32
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33
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34 #include "../PrecompiledHeaders.h"
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35 #include "StringMatcher.h"
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36
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37 #include "../OrthancException.h"
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38
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39 #include <boost/algorithm/searching/boyer_moore.hpp>
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40 //#include <boost/algorithm/searching/boyer_moore_horspool.hpp>
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41 //#include <boost/algorithm/searching/knuth_morris_pratt.hpp>
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42
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43 namespace Orthanc
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44 {
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45 class StringMatcher::Search
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46 {
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47 private:
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48 typedef boost::algorithm::boyer_moore<Iterator> Algorithm;
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49 //typedef boost::algorithm::boyer_moore_horspool<std::string::const_iterator> Algorithm;
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50
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51 Algorithm algorithm_;
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52
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53 public:
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54 // WARNING - The lifetime of "pattern_" must be larger than
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55 // "search_", as the latter internally keeps a pointer to "pattern" (*)
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56 Search(const std::string& pattern) :
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57 algorithm_(pattern.begin(), pattern.end())
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58 {
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59 }
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60
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61 Iterator Apply(Iterator start,
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62 Iterator end) const
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63 {
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64 #if BOOST_VERSION >= 106200
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65 return algorithm_(start, end).first;
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66 #else
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67 return algorithm_(start, end);
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68 #endif
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69 }
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70 };
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71
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72
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73 StringMatcher::StringMatcher(const std::string& pattern) :
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74 pattern_(pattern),
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75 valid_(false)
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76 {
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77 // WARNING - Don't use "pattern" (local variable, will be
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78 // destroyed once exiting the constructor) but "pattern_"
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79 // (variable member, will last as long as the algorithm),
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80 // otherwise lifetime is bad! (*)
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81 search_.reset(new Search(pattern_));
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82 }
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83
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84
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85 bool StringMatcher::Apply(Iterator start,
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86 Iterator end)
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87 {
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88 assert(search_.get() != NULL);
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89 matchBegin_ = search_->Apply(start, end);
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90
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91 if (matchBegin_ == end)
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92 {
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93 valid_ = false;
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94 }
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95 else
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96 {
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97 matchEnd_ = matchBegin_ + pattern_.size();
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98 assert(matchEnd_ <= end);
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99 valid_ = true;
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100 }
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101
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102 return valid_;
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103 }
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104
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105
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106 StringMatcher::Iterator StringMatcher::GetMatchBegin() const
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107 {
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108 if (valid_)
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109 {
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110 return matchBegin_;
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111 }
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112 else
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113 {
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114 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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115 }
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116 }
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117
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118
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119 StringMatcher::Iterator StringMatcher::GetMatchEnd() const
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120 {
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121 if (valid_)
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122 {
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123 return matchEnd_;
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124 }
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125 else
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126 {
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127 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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128 }
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129 }
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130
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131
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132 const char* StringMatcher::GetPointerBegin() const
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133 {
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134 return &GetMatchBegin()[0];
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135 }
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136
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137
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Sebastien Jodogne <s.jodogne@gmail.com>
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138 const char* StringMatcher::GetPointerEnd() const
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Sebastien Jodogne <s.jodogne@gmail.com>
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139 {
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8de071691d13 fix for visual studio 2008
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140 return GetPointerBegin() + pattern_.size();
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141 }
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Sebastien Jodogne <s.jodogne@gmail.com>
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142 }