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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2009 InspIRCd Development Team
* See: http://wiki.inspircd.org/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "m_regex.h"
#include <sys/types.h>
#include <regex.h>
/* $ModDesc: Regex Provider Module for POSIX Regular Expressions */
/* $ModDep: m_regex.h */
class POSIXRegexException : public ModuleException
{
public:
POSIXRegexException(const std::string& rx, const std::string& error)
: ModuleException(std::string("Error in regex ") + rx + ": " + error)
{
}
};
class POSIXRegex : public Regex
{
private:
regex_t regbuf;
public:
POSIXRegex(const std::string& rx, bool extended) : Regex(rx)
{
int flags = (extended ? REG_EXTENDED : 0) | REG_NOSUB;
int errcode;
errcode = regcomp(®buf, rx.c_str(), flags);
if (errcode)
{
// Get the error string into a std::string. YUCK this involves at least 2 string copies.
std::string error;
char* errbuf;
size_t sz = regerror(errcode, ®buf, NULL, 0);
errbuf = new char[sz + 1];
memset(errbuf, 0, sz + 1);
regerror(errcode, ®buf, errbuf, sz + 1);
error = errbuf;
delete[] errbuf;
regfree(®buf);
throw POSIXRegexException(rx, error);
}
}
virtual ~POSIXRegex()
{
regfree(®buf);
}
virtual bool Matches(const std::string& text)
{
if (regexec(®buf, text.c_str(), 0, NULL, 0) == 0)
{
// Bang. :D
return true;
}
return false;
}
};
class ModuleRegexPOSIX : public Module
{
private:
bool extended;
public:
ModuleRegexPOSIX() {
ServerInstance->Modules->PublishInterface("RegularExpression", this);
Implementation eventlist[] = { I_OnRequest, I_OnRehash };
ServerInstance->Modules->Attach(eventlist, this, 2);
OnRehash(NULL);
}
virtual Version GetVersion()
{
return Version("Regex Provider Module for POSIX Regular Expressions", VF_COMMON | VF_VENDOR | VF_SERVICEPROVIDER, API_VERSION);
}
virtual ~ModuleRegexPOSIX()
{
ServerInstance->Modules->UnpublishInterface("RegularExpression", this);
}
virtual void OnRehash(User* u)
{
ConfigReader Conf;
extended = Conf.ReadFlag("posix", "extended", 0);
}
virtual const char* OnRequest(Request* request)
{
if (strcmp("REGEX-NAME", request->GetId()) == 0)
{
return "posix";
}
else if (strcmp("REGEX", request->GetId()) == 0)
{
RegexFactoryRequest* rfr = (RegexFactoryRequest*)request;
std::string rx = rfr->GetRegex();
rfr->result = new POSIXRegex(rx, extended);
return "OK";
}
return NULL;
}
};
MODULE_INIT(ModuleRegexPOSIX)
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