ceph/src/boost/libs/regex/performance/boost.cpp

   1 ///////////////////////////////////////////////////////////////
   2 //  Copyright 2015 John Maddock. Distributed under the Boost
   3 //  Software License, Version 1.0. (See accompanying file
   4 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_
   5 //
   6
   7 #include "performance.hpp"
   8 #include <boost/regex.hpp>
   9 #include <boost/version.hpp>
  10 #include <boost/lexical_cast.hpp>
  11
  12 struct boost_regex : public abstract_regex
  13 {
  14 private:
  15    boost::regex e;
  16    boost::cmatch what;
  17 public:
  18    virtual bool set_expression(const char* pe, bool isperl)
  19    {
  20       e.assign(pe, isperl ? boost::regex::perl : boost::regex::extended);
  21       return e.status() == 0;
  22    }
  23    virtual bool match_test(const char* text);
  24    virtual unsigned find_all(const char* text);
  25    virtual std::string name();
  26
  27    struct initializer
  28    {
  29       initializer()
  30       {
  31          boost_regex::register_instance(boost::shared_ptr<abstract_regex>(new boost_regex));
  32       }
  33       void do_nothing()const {}
  34    };
  35    static const initializer init;
  36 };
  37
  38 const boost_regex::initializer boost_regex::init;
  39
  40
  41 bool boost_regex::match_test(const char * text)
  42 {
  43    return regex_match(text, what, e);
  44 }
  45
  46 unsigned boost_regex::find_all(const char * text)
  47 {
  48    boost::regex_iterator<const char*> i(text, text + std::strlen(text), e), j;
  49    unsigned count = 0;
  50    while(i != j)
  51    {
  52       ++i;
  53       ++count;
  54    }
  55    return count;
  56 }
  57
  58 std::string boost_regex::name()
  59 {
  60    init.do_nothing();
  61    return boost_name();
  62 }