hashcomp.h

/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2019 linuxdaemon <[email protected]>
 *   Copyright (C) 2013, 2018-2019 Sadie Powell <[email protected]>
 *   Copyright (C) 2013 Adam <[email protected]>
 *   Copyright (C) 2012-2013, 2016 Attila Molnar <[email protected]>
 *   Copyright (C) 2012 Robby <[email protected]>
 *   Copyright (C) 2009 Uli Schlachter <[email protected]>
 *   Copyright (C) 2009 Daniel De Graaf <[email protected]>
 *   Copyright (C) 2008-2009 Robin Burchell <[email protected]>
 *   Copyright (C) 2007 Dennis Friis <[email protected]>
 *   Copyright (C) 2005-2010 Craig Edwards <[email protected]>
 *
 * 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/>.
 */
 
 
#pragma once
 
#include "inspircd.h"
#include "convto.h"
 
/*******************************************************
 * This file contains classes and templates that deal
 * with the comparison and hashing of 'irc strings'.
 * An 'irc string' is a string which compares in a
 * case insensitive manner, and as per RFC 1459 will
 * treat [ identical to {, ] identical to }, and \
 * as identical to |.
 *
 * There are functors that accept std::string and
 * compare/hash them as type irc::string by using
 * mapping arrays internally.
 *******************************************************/
 
CoreExport extern unsigned const char *national_case_insensitive_map;
 
CoreExport extern unsigned const char rfc_case_insensitive_map[256];
 
CoreExport extern unsigned const char ascii_case_insensitive_map[256];
 
namespace irc
{
        CoreExport bool equals(const std::string& s1, const std::string& s2);
 
        CoreExport size_t find(const std::string& haystack, const std::string& needle);
 
        struct StrHashComp
        {
                bool operator()(const std::string& s1, const std::string& s2) const
                {
                        return equals(s1, s2);
                }
        };
 
        struct insensitive
        {
                size_t CoreExport operator()(const std::string &s) const;
        };
 
        struct insensitive_swo
        {
                bool CoreExport operator()(const std::string& a, const std::string& b) const;
        };
 
        class CoreExport sepstream
        {
         protected:
                std::string tokens;
                char sep;
                size_t pos;
                bool allow_empty;
         public:
                sepstream(const std::string &source, char separator, bool allowempty = false);
 
                bool GetToken(std::string& token);
 
                template<typename Numeric>
                bool GetNumericToken(Numeric& token)
                {
                        std::string str;
                        if (!GetToken(str))
                                return false;
 
                        token = ConvToNum<Numeric>(str);
                        return true;
                }
 
                const std::string GetRemaining();
 
                bool StreamEnd();
 
                bool Contains(const std::string& value);
        };
 
        class CoreExport commasepstream : public sepstream
        {
         public:
                commasepstream(const std::string &source, bool allowempty = false) : sepstream(source, ',', allowempty)
                {
                }
        };
 
        class CoreExport spacesepstream : public sepstream
        {
         public:
                spacesepstream(const std::string &source, bool allowempty = false) : sepstream(source, ' ', allowempty)
                {
                }
        };
 
        class CoreExport tokenstream
        {
        private:
                std::string message;
 
                size_t position;
 
         public:
                tokenstream(const std::string& msg, size_t start = 0, size_t end = std::string::npos);
 
                std::string& GetMessage() { return message; }
 
                bool GetMiddle(std::string& token);
 
                bool GetTrailing(std::string& token);
        };
 
        class CoreExport portparser
        {
         private:
 
                commasepstream sep;
 
                long in_range;
 
                long range_begin;
 
                long range_end;
 
                bool overlapped;
 
                std::set<long> overlap_set;
 
                bool Overlaps(long val);
         public:
 
                portparser(const std::string &source, bool allow_overlapped = true);
 
                long GetToken();
        };
}