Mercurial > hg > orthanc
annotate Core/HttpServer/StringMatcher.cpp @ 3499:d8f7c3970e25
more tolerance in ImageProcessing::Set()
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 23 Aug 2019 17:31:43 +0200 |
parents | 8de071691d13 |
children | 94f4a18a79cc |
rev | line source |
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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 |
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5 * Copyright (C) 2017-2019 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: |
3403 | 54 // WARNING - The lifetime of "pattern_" must be larger than |
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 { |
3403 | 77 // WARNING - Don't use "pattern" (local variable, will be |
78 // destroyed once exiting the constructor) but "pattern_" | |
79 // (variable member, will last as long as the algorithm), | |
80 // otherwise lifetime is bad! (*) | |
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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138 const char* StringMatcher::GetPointerEnd() const |
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139 { |
3406 | 140 return GetPointerBegin() + pattern_.size(); |
3398
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141 } |
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142 } |