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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
* E-mail:
* <brain@chatspike.net>
* <Craig@chatspike.net>
*
* 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<insp_inaddr>
{
/** 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<std::string>
{
/** 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<char> {
/** 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);
};
std::string hex(const unsigned char *raw, size_t rawsz);
/** This typedef declares irc::string based upon irc_char_traits
*/
typedef basic_string<char, irc_char_traits, allocator<char> > 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
|
