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home » brain » inspircd-cvs » inspircd » src » modules » extra

m_regex_pcre.cpp

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/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  InspIRCd: (C) 2002-2008 InspIRCd Development Team
 * See: http://www.inspircd.org/wiki/index.php/Credits
 *
 * This program is free but copyrighted software; see
 *            the file COPYING for details.
 *
 * ---------------------------------------------------
 */

#include "inspircd.h"
#include <pcre.h>
#include "m_regex.h"

/* $ModDesc: Regex Provider Module for PCRE */
/* $ModDep: m_regex.h */
/* $CompileFlags: exec("pcre-config --cflags") */
/* $LinkerFlags: exec("pcre-config --libs") rpath("pcre-config --libs") -lpcre */

#ifdef WINDOWS
#pragma comment(lib, "pcre.lib")
#endif

class PCREException : public ModuleException
{
public:
        PCREException(const std::string& rx, const std::string& error, int erroffset)
                : ModuleException(std::string("Error in regex ") + rx + " at offset " + ConvToStr(erroffset) + ": " + error)
        {
        }
};

class PCRERegex : public Regex
{
private:
        pcre* regex;

public:
        PCRERegex(const std::string& rx, InspIRCd* Me) : Regex(rx, Me)
        {
                const char* error;
                int erroffset;
                regex = pcre_compile(rx.c_str(), 0, &error, &erroffset, NULL);
                if (!regex)
                {
                        Me->Logs->Log("REGEX", DEBUG, "pcre_compile failed: /%s/ [%d] %s", rx.c_str(), erroffset, error);
                        throw PCREException(rx, error, erroffset);
                }
        }

        virtual ~PCRERegex()
        {
                pcre_free(regex);
        }

        virtual bool Matches(const std::string& text)
        {
                if (pcre_exec(regex, NULL, text.c_str(), text.length(), 0, 0, NULL, 0) > -1)
                {
                        // Bang. :D
                        return true;
                }
                return false;
        }
};

class ModuleRegexPCRE : public Module
{
public:
        ModuleRegexPCRE(InspIRCd* Me) : Module(Me)
        {
                Me->Modules->PublishInterface("RegularExpression", this);
                Implementation eventlist[] = { I_OnRequest };
                Me->Modules->Attach(eventlist, this, 1);
        }

        virtual Version GetVersion()
        {
                return Version("$Id: m_regex_pcre.cpp 10593 2008-09-22 15:22:15Z brain $", VF_COMMON | VF_VENDOR | VF_SERVICEPROVIDER, API_VERSION);
        }

        virtual ~ModuleRegexPCRE()
        {
                ServerInstance->Modules->UnpublishInterface("RegularExpression", this);
        }

        virtual const char* OnRequest(Request* request)
        {
                if (strcmp("REGEX-NAME", request->GetId()) == 0)
                {
                        return "pcre";
                }
                else if (strcmp("REGEX", request->GetId()) == 0)
                {
                        RegexFactoryRequest* rfr = (RegexFactoryRequest*)request;
                        std::string rx = rfr->GetRegex();
                        rfr->result = new PCRERegex(rx, ServerInstance);
                        return "OK";
                }
                return NULL;
        }
};

MODULE_INIT(ModuleRegexPCRE)