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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "inspircd.h"
#include "modules/regex.h"
#include <sys/types.h>
#include <regex.h>
/* $ModDesc: Regex Provider Module for POSIX Regular Expressions */
/* $ModDep: modules/regex.h */
class POSIXRegexException : public ModuleException
{
public:
POSIXRegexException(const std::string& rx, const std::string& error)
: ModuleException("Error in regex " + rx + ": " + error)
{
}
};
class POSIXRegex : public Regex
{
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);
}
}
~POSIXRegex()
{
regfree(®buf);
}
bool Matches(const std::string& text)
{
if (regexec(®buf, text.c_str(), 0, NULL, 0) == 0)
{
// Bang. :D
return true;
}
return false;
}
};
class PosixFactory : public RegexFactory
{
public:
bool extended;
PosixFactory(Module* m) : RegexFactory(m, "regex/posix") {}
Regex* Create(const std::string& expr)
{
return new POSIXRegex(expr, extended);
}
};
class ModuleRegexPOSIX : public Module
{
PosixFactory ref;
public:
ModuleRegexPOSIX() : ref(this)
{
ServerInstance->Modules->AddService(ref);
Implementation eventlist[] = { I_OnRehash };
ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
OnRehash(NULL);
}
Version GetVersion() CXX11_OVERRIDE
{
return Version("Regex Provider Module for POSIX Regular Expressions", VF_VENDOR);
}
void OnRehash(User* u) CXX11_OVERRIDE
{
ref.extended = ServerInstance->Config->ConfValue("posix")->getBool("extended");
}
};
MODULE_INIT(ModuleRegexPOSIX)
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