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 #ifdef TEST_PCRE2
8
9 #define PCRE2_STATIC
10 #define PCRE2_CODE_UNIT_WIDTH 8
11
12 #include "performance.hpp"
13 #include <pcre2.h>
14 #include <boost/version.hpp>
15 #include <boost/lexical_cast.hpp>
16
17 struct pcre_regex : public abstract_regex
18 {
19 private:
20 pcre2_code* pe;
21 pcre2_match_data* pdata;
22 public:
pcre_regexpcre_regex23 pcre_regex()
24 : pe(0)
25 {
26 pdata = pcre2_match_data_create(30, NULL);
27 }
~pcre_regexpcre_regex28 ~pcre_regex()
29 {
30 if(pe)
31 pcre2_code_free(pe);
32 pcre2_match_data_free(pdata);
33 }
set_expressionpcre_regex34 virtual bool set_expression(const char* pat, bool isperl)
35 {
36 if(!isperl)
37 return false;
38 if(pe)
39 pcre2_code_free(pe);
40 int errorcode = 0;
41 PCRE2_SIZE erroroffset;
42 pe = pcre2_compile((PCRE2_SPTR)pat, std::strlen(pat), PCRE2_MULTILINE, &errorcode, &erroroffset, NULL);
43 return pe ? true : false;
44 }
45 virtual bool match_test(const char* text);
46 virtual unsigned find_all(const char* text);
47 virtual std::string name();
48
49 struct initializer
50 {
initializerpcre_regex::initializer51 initializer()
52 {
53 pcre_regex::register_instance(boost::shared_ptr<abstract_regex>(new pcre_regex));
54 }
do_nothingpcre_regex::initializer55 void do_nothing()const {}
56 };
57 static const initializer init;
58 };
59
60 const pcre_regex::initializer pcre_regex::init;
61
62
match_test(const char * text)63 bool pcre_regex::match_test(const char * text)
64 {
65 int r = pcre2_match(pe, (PCRE2_SPTR)text, std::strlen(text), 0, PCRE2_ANCHORED, pdata, NULL);
66 return r >= 0;
67 }
68
find_all(const char * text)69 unsigned pcre_regex::find_all(const char * text)
70 {
71 unsigned count = 0;
72 int flags = 0;
73 const char* end = text + std::strlen(text);
74 while(pcre2_match(pe, (PCRE2_SPTR)text, end - text, 0, flags, pdata, NULL) >= 0)
75 {
76 ++count;
77 PCRE2_SIZE* v = pcre2_get_ovector_pointer(pdata);
78 text += v[1];
79 if(v[0] == v[1])
80 ++text;
81 if(*text)
82 {
83 flags = *(text - 1) == '\n' ? 0 : PCRE2_NOTBOL;
84 }
85 }
86 return count;
87 }
88
name()89 std::string pcre_regex::name()
90 {
91 init.do_nothing();
92 return std::string("PCRE-") + boost::lexical_cast<std::string>(PCRE2_MAJOR) + "." + boost::lexical_cast<std::string>(PCRE2_MINOR);
93 }
94
95 #endif
96