/* +------------------------------------+ * | Inspire Internet Relay Chat Daemon | * +------------------------------------+ * * InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev. * E-mail: * * * * Written by Craig Edwards, Craig McLure, and others. * This program is free but copyrighted software; see * the file COPYING for details. * * --------------------------------------------------- */ #ifndef _HASHCOMP_H_ #define _HASHCOMP_H_ #include "inspircd_config.h" #include "socket.h" #include "hash_map.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 |. * * Our hashing functions are designed to accept * std::string and compare/hash them as type irc::string * by converting them internally. This makes them * backwards compatible with other code which is not * aware of irc::string. *******************************************************/ using namespace std; using irc::sockets::insp_aton; using irc::sockets::insp_ntoa; using irc::sockets::insp_inaddr; #ifndef LOWERMAP #define LOWERMAP /** A mapping of uppercase to lowercase, including scandinavian * 'oddities' as specified by RFC1459, e.g. { -> [, and | -> \ */ unsigned const char lowermap[256] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, /* 0-19 */ 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, /* 20-39 */ 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, /* 40-59 */ 60, 61, 62, 63, 64, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, /* 60-79 */ 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 94, 95, 96, 97, 98, 99, /* 80-99 */ 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, /* 100-119 */ 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, /* 120-139 */ 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, /* 140-159 */ 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, /* 160-179 */ 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, /* 180-199 */ 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, /* 200-219 */ 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, /* 220-239 */ 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255 /* 240-255 */ }; #endif /** Because of weirdness in g++, before 3.x this was namespace std. It's now __gnu_cxx. * This is a #define'd alias. */ namespace nspace { /** Convert a string to lower case respecting RFC1459 * @param n A string to lowercase */ void strlower(char *n); /** Hashing function to hash insp_inaddr structs */ template<> struct hash { /** Hash an insp_inaddr * @param a An insp_inaddr to hash * @return The hash value */ size_t operator()(const insp_inaddr &a) const; }; /** Hashing function to hash std::string without respect to case */ template<> struct hash { /** Hash a std::string using RFC1459 case sensitivity rules * @param s A string to hash * @return The hash value */ size_t operator()(const string &s) const; }; } /** The irc namespace contains a number of helper classes. */ namespace irc { /** This class returns true if two strings match. * Case sensitivity is ignored, and the RFC 'character set' * is adhered to */ struct StrHashComp { /** The operator () does the actual comparison in hash_map */ bool operator()(const std::string& s1, const std::string& s2) const; }; /** This class returns true if two insp_inaddr structs match. * Checking is done by copying both into a size_t then doing a * numeric comparison of the two. */ struct InAddr_HashComp { /** The operator () does the actual comparison in hash_map */ bool operator()(const insp_inaddr &s1, const insp_inaddr &s2) const; }; /** irc::tokenstream reads a string formatted as per RFC1459 and RFC2812. * It will split the string into 'tokens' each containing one parameter * from the string. * For instance, if it is instantiated with the string: * "PRIVMSG #test :foo bar baz qux" * then each successive call to tokenstream::GetToken() will return * "PRIVMSG", "#test", "foo bar baz qux", "". * Note that if the whole string starts with a colon this is not taken * to mean the string is all one parameter, and the first item in the * list will be ":item". This is to allow for parsing 'source' fields * from data. */ class tokenstream { private: std::string tokens; std::string::iterator last_starting_position; std::string::iterator n; bool last_pushed; public: /** Create a tokenstream and fill it with the provided data */ tokenstream(const std::string &source); ~tokenstream(); /** Fetch the next token from the stream * @returns The next token is returned, or an empty string if none remain */ const std::string GetToken(); }; /** irc::commasepstream allows for splitting comma seperated lists. * Lists passed to irc::commasepstream should not contain spaces * after the commas, or this will be taken to be part of the item * data. Each successive call to commasepstream::GetToken() returns * the next token, until none remain, at which point the method returns * an empty string. */ class commasepstream { private: std::string tokens; std::string::iterator last_starting_position; std::string::iterator n; public: /** Create a commasepstream and fill it with the provided data */ commasepstream(const std::string &source); ~commasepstream(); /** Fetch the next token from the stream * @returns The next token is returned, or an empty string if none remain */ const std::string GetToken(); }; /** The irc_char_traits class is used for RFC-style comparison of strings. * This class is used to implement irc::string, a case-insensitive, RFC- * comparing string class. */ struct irc_char_traits : std::char_traits { /** Check if two chars match */ static bool eq(char c1st, char c2nd); /** Check if two chars do NOT match */ static bool ne(char c1st, char c2nd); /** Check if one char is less than another */ static bool lt(char c1st, char c2nd); /** Compare two strings of size n */ static int compare(const char* str1, const char* str2, size_t n); /** Find a char within a string up to position n */ static const char* find(const char* s1, int n, char c); }; /** This typedef declares irc::string based upon irc_char_traits */ typedef basic_string > string; } /* Define operators for using >> and << with irc::string to an ostream on an istream. */ /* This was endless fun. No. Really. */ /* It was also the first core change Ommeh made, if anyone cares */ std::ostream& operator<<(std::ostream &os, const irc::string &str); std::istream& operator>>(std::istream &is, irc::string &str); /* Define operators for + and == with irc::string to std::string for easy assignment * and comparison - Brain */ std::string operator+ (std::string& leftval, irc::string& rightval); irc::string operator+ (irc::string& leftval, std::string& rightval); bool operator== (std::string& leftval, irc::string& rightval); bool operator== (irc::string& leftval, std::string& rightval); #endif