96 lines
2.3 KiB
C++
96 lines
2.3 KiB
C++
///////////////////////////////////////////////////////////////
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// Copyright 2015 John Maddock. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_
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//
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#ifdef TEST_PCRE2
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#define PCRE2_STATIC
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#define PCRE2_CODE_UNIT_WIDTH 8
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#include "performance.hpp"
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#include <pcre2.h>
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#include <boost/version.hpp>
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#include <boost/lexical_cast.hpp>
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struct pcre_regex : public abstract_regex
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{
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private:
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pcre2_code* pe;
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pcre2_match_data* pdata;
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public:
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pcre_regex()
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: pe(0)
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{
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pdata = pcre2_match_data_create(30, NULL);
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}
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~pcre_regex()
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{
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if(pe)
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pcre2_code_free(pe);
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pcre2_match_data_free(pdata);
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}
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virtual bool set_expression(const char* pat, bool isperl)
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{
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if(!isperl)
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return false;
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if(pe)
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pcre2_code_free(pe);
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int errorcode = 0;
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PCRE2_SIZE erroroffset;
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pe = pcre2_compile((PCRE2_SPTR)pat, std::strlen(pat), PCRE2_MULTILINE, &errorcode, &erroroffset, NULL);
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return pe ? true : false;
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}
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virtual bool match_test(const char* text);
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virtual unsigned find_all(const char* text);
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virtual std::string name();
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struct initializer
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{
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initializer()
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{
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pcre_regex::register_instance(boost::shared_ptr<abstract_regex>(new pcre_regex));
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}
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void do_nothing()const {}
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};
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static const initializer init;
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};
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const pcre_regex::initializer pcre_regex::init;
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bool pcre_regex::match_test(const char * text)
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{
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int r = pcre2_match(pe, (PCRE2_SPTR)text, std::strlen(text), 0, PCRE2_ANCHORED, pdata, NULL);
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return r >= 0;
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}
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unsigned pcre_regex::find_all(const char * text)
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{
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unsigned count = 0;
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int flags = 0;
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const char* end = text + std::strlen(text);
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while(pcre2_match(pe, (PCRE2_SPTR)text, end - text, 0, flags, pdata, NULL) >= 0)
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{
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++count;
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PCRE2_SIZE* v = pcre2_get_ovector_pointer(pdata);
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text += v[1];
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if(v[0] == v[1])
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++text;
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if(*text)
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{
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flags = *(text - 1) == '\n' ? 0 : PCRE2_NOTBOL;
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}
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}
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return count;
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}
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std::string pcre_regex::name()
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{
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init.do_nothing();
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return std::string("PCRE-") + boost::lexical_cast<std::string>(PCRE2_MAJOR) + "." + boost::lexical_cast<std::string>(PCRE2_MINOR);
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}
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#endif
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