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05066cfa55
git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@4952 e03df62e-2008-0410-955e-edbf42e46eb7
230 lines
7.9 KiB
C++
230 lines
7.9 KiB
C++
/* +------------------------------------+
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* | Inspire Internet Relay Chat Daemon |
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* +------------------------------------+
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*
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* InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
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* E-mail:
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* <brain@chatspike.net>
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* <Craig@chatspike.net>
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*
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* Written by Craig Edwards, Craig McLure, and others.
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* This program is free but copyrighted software; see
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* the file COPYING for details.
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*
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* ---------------------------------------------------
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*/
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#ifndef _HASHCOMP_H_
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#define _HASHCOMP_H_
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#include "inspircd_config.h"
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#include "socket.h"
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#include "hash_map.h"
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/*******************************************************
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* This file contains classes and templates that deal
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* with the comparison and hashing of 'irc strings'.
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* An 'irc string' is a string which compares in a
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* case insensitive manner, and as per RFC 1459 will
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* treat [ identical to {, ] identical to }, and \
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* as identical to |.
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*
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* Our hashing functions are designed to accept
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* std::string and compare/hash them as type irc::string
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* by converting them internally. This makes them
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* backwards compatible with other code which is not
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* aware of irc::string.
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*******************************************************/
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using namespace std;
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using irc::sockets::insp_aton;
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using irc::sockets::insp_ntoa;
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using irc::sockets::insp_inaddr;
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#ifndef LOWERMAP
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#define LOWERMAP
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/** A mapping of uppercase to lowercase, including scandinavian
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* 'oddities' as specified by RFC1459, e.g. { -> [, and | -> \
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*/
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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 */
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20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, /* 20-39 */
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40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, /* 40-59 */
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60, 61, 62, 63, 64, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, /* 60-79 */
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112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 94, 95, 96, 97, 98, 99, /* 80-99 */
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100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, /* 100-119 */
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120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, /* 120-139 */
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140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, /* 140-159 */
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160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, /* 160-179 */
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180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, /* 180-199 */
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200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, /* 200-219 */
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220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, /* 220-239 */
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240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255 /* 240-255 */
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};
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#endif
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/** Because of weirdness in g++, before 3.x this was namespace std. It's now __gnu_cxx.
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* This is a #define'd alias.
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*/
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namespace nspace
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{
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/** Convert a string to lower case respecting RFC1459
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* @param n A string to lowercase
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*/
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void strlower(char *n);
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/** Hashing function to hash insp_inaddr structs
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*/
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template<> struct hash<insp_inaddr>
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{
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/** Hash an insp_inaddr
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* @param a An insp_inaddr to hash
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* @return The hash value
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*/
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size_t operator()(const insp_inaddr &a) const;
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};
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/** Hashing function to hash std::string without respect to case
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*/
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template<> struct hash<std::string>
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{
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/** Hash a std::string using RFC1459 case sensitivity rules
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* @param s A string to hash
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* @return The hash value
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*/
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size_t operator()(const string &s) const;
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};
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}
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/** The irc namespace contains a number of helper classes.
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*/
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namespace irc
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{
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/** This class returns true if two strings match.
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* Case sensitivity is ignored, and the RFC 'character set'
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* is adhered to
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*/
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struct StrHashComp
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{
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/** The operator () does the actual comparison in hash_map
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*/
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bool operator()(const std::string& s1, const std::string& s2) const;
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};
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/** This class returns true if two insp_inaddr structs match.
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* Checking is done by copying both into a size_t then doing a
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* numeric comparison of the two.
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*/
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struct InAddr_HashComp
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{
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/** The operator () does the actual comparison in hash_map
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*/
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bool operator()(const insp_inaddr &s1, const insp_inaddr &s2) const;
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};
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/** irc::tokenstream reads a string formatted as per RFC1459 and RFC2812.
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* It will split the string into 'tokens' each containing one parameter
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* from the string.
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* For instance, if it is instantiated with the string:
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* "PRIVMSG #test :foo bar baz qux"
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* then each successive call to tokenstream::GetToken() will return
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* "PRIVMSG", "#test", "foo bar baz qux", "".
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* Note that if the whole string starts with a colon this is not taken
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* to mean the string is all one parameter, and the first item in the
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* list will be ":item". This is to allow for parsing 'source' fields
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* from data.
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*/
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class tokenstream
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{
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private:
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std::string tokens;
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std::string::iterator last_starting_position;
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std::string::iterator n;
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bool last_pushed;
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public:
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/** Create a tokenstream and fill it with the provided data
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*/
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tokenstream(const std::string &source);
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~tokenstream();
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/** Fetch the next token from the stream
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* @returns The next token is returned, or an empty string if none remain
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*/
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const std::string GetToken();
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};
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/** irc::commasepstream allows for splitting comma seperated lists.
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* Lists passed to irc::commasepstream should not contain spaces
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* after the commas, or this will be taken to be part of the item
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* data. Each successive call to commasepstream::GetToken() returns
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* the next token, until none remain, at which point the method returns
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* an empty string.
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*/
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class commasepstream
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{
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private:
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std::string tokens;
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std::string::iterator last_starting_position;
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std::string::iterator n;
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public:
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/** Create a commasepstream and fill it with the provided data
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*/
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commasepstream(const std::string &source);
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~commasepstream();
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/** Fetch the next token from the stream
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* @returns The next token is returned, or an empty string if none remain
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*/
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const std::string GetToken();
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};
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/** The irc_char_traits class is used for RFC-style comparison of strings.
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* This class is used to implement irc::string, a case-insensitive, RFC-
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* comparing string class.
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*/
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struct irc_char_traits : std::char_traits<char> {
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/** Check if two chars match
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*/
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static bool eq(char c1st, char c2nd);
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/** Check if two chars do NOT match
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*/
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static bool ne(char c1st, char c2nd);
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/** Check if one char is less than another
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*/
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static bool lt(char c1st, char c2nd);
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/** Compare two strings of size n
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*/
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static int compare(const char* str1, const char* str2, size_t n);
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/** Find a char within a string up to position n
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*/
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static const char* find(const char* s1, int n, char c);
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};
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/** This typedef declares irc::string based upon irc_char_traits
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*/
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typedef basic_string<char, irc_char_traits, allocator<char> > string;
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}
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/* Define operators for using >> and << with irc::string to an ostream on an istream. */
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/* This was endless fun. No. Really. */
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/* It was also the first core change Ommeh made, if anyone cares */
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std::ostream& operator<<(std::ostream &os, const irc::string &str);
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std::istream& operator>>(std::istream &is, irc::string &str);
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/* Define operators for + and == with irc::string to std::string for easy assignment
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* and comparison - Brain
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*/
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std::string operator+ (std::string& leftval, irc::string& rightval);
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irc::string operator+ (irc::string& leftval, std::string& rightval);
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bool operator== (std::string& leftval, irc::string& rightval);
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bool operator== (irc::string& leftval, std::string& rightval);
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#endif
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