anope

- supernets anope source code & configuration
git clone git://git.acid.vegas/anope.git
m_regex_pcre2.cpp (2190B)
      1 /*
      2  *
      3  * (C) 2012-2022 Anope Team
      4  * Contact us at team@anope.org
      5  *
      6  * Please read COPYING and README for further details.
      7  */
      8 
      9 /* RequiredLibraries: pcre2-8 */
     10 /* RequiredWindowsLibraries: libpcre2-8 */
     11 
     12 #include "module.h"
     13 
     14 #define PCRE2_CODE_UNIT_WIDTH 8
     15 #include <pcre2.h>
     16 
     17 class PCRERegex : public Regex
     18 {
     19 	pcre2_code *regex;
     20 
     21  public:
     22 	PCRERegex(const Anope::string &expr) : Regex(expr)
     23 	{
     24 		int errcode;
     25 		PCRE2_SIZE erroffset;
     26 		this->regex = pcre2_compile(reinterpret_cast<PCRE2_SPTR8>(expr.c_str()), expr.length(), PCRE2_CASELESS, &errcode, &erroffset, NULL);
     27 
     28 		if (!this->regex)
     29 		{
     30 			PCRE2_UCHAR error[128];
     31 			pcre2_get_error_message(errcode, error, sizeof error);
     32 			throw RegexException("Error in regex " + expr + " at offset " + stringify(erroffset) + ": " + reinterpret_cast<const char*>(error));
     33 		}
     34 	}
     35 
     36 	~PCRERegex()
     37 	{
     38 		pcre2_code_free(this->regex);
     39 	}
     40 
     41 	bool Matches(const Anope::string &str)
     42 	{
     43 		pcre2_match_data *unused = pcre2_match_data_create_from_pattern(this->regex, NULL);
     44 		int result = pcre2_match(regex, reinterpret_cast<PCRE2_SPTR8>(str.c_str()), str.length(), 0, 0, unused, NULL);
     45 		pcre2_match_data_free(unused);
     46 		return result >= 0;
     47 	}
     48 };
     49 
     50 class PCRERegexProvider : public RegexProvider
     51 {
     52  public:
     53 	PCRERegexProvider(Module *creator) : RegexProvider(creator, "regex/pcre") { }
     54 
     55 	Regex *Compile(const Anope::string &expression) anope_override
     56 	{
     57 		return new PCRERegex(expression);
     58 	}
     59 };
     60 
     61 class ModuleRegexPCRE : public Module
     62 {
     63 	PCRERegexProvider pcre_regex_provider;
     64 
     65  public:
     66 	ModuleRegexPCRE(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, EXTRA | VENDOR),
     67 		pcre_regex_provider(this)
     68 	{
     69 		this->SetPermanent(true);
     70 	}
     71 
     72 	~ModuleRegexPCRE()
     73 	{
     74 		for (std::list<XLineManager *>::iterator it = XLineManager::XLineManagers.begin(); it != XLineManager::XLineManagers.end(); ++it)
     75 		{
     76 			XLineManager *xlm = *it;
     77 			const std::vector<XLine *> &xlines = xlm->GetList();
     78 
     79 			for (unsigned int i = 0; i < xlines.size(); ++i)
     80 			{
     81 				XLine *x = xlines[i];
     82 
     83 				if (x->regex && dynamic_cast<PCRERegex *>(x->regex))
     84 				{
     85 					delete x->regex;
     86 					x->regex = NULL;
     87 				}
     88 			}
     89 		}
     90 	}
     91 };
     92 
     93 MODULE_INIT(ModuleRegexPCRE)