/* +------------------------------------+ * | 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. * * --------------------------------------------------- */ #ifndef _HASHCOMP_H_ #define _HASHCOMP_H_ #include //#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. *******************************************************/ #ifndef LOWERMAP #define LOWERMAP /** A mapping of uppercase to lowercase, including scandinavian * 'oddities' as specified by RFC1459, e.g. { -> [, and | -> \ */ unsigned const char rfc_case_insensitive_map[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 */ }; /* * case sensitive map. */ unsigned const char case_sensitive_map[256] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255 }; #endif /** 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; }; /** 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. * @param c1st First character * @param c2nd Second character * @return true if the characters are equal */ static bool eq(char c1st, char c2nd); /** Check if two chars do NOT match. * @param c1st First character * @param c2nd Second character * @return true if the characters are unequal */ static bool ne(char c1st, char c2nd); /** Check if one char is less than another. * @param c1st First character * @param c2nd Second character * @return true if c1st is less than c2nd */ static bool lt(char c1st, char c2nd); /** Compare two strings of size n. * @param str1 First string * @param str2 Second string * @param n Length to compare to * @return similar to strcmp, zero for equal, less than zero for str1 * being less and greater than zero for str1 being greater than str2. */ static CoreExport int compare(const char* str1, const char* str2, size_t n); /** Find a char within a string up to position n. * @param s1 String to find in * @param n Position to search up to * @param c Character to search for * @return Pointer to the first occurance of c in s1 */ static CoreExport const char* find(const char* s1, int n, char c); }; /** Compose a hex string from raw data. * @param raw The raw data to compose hex from * @pram rawsz The size of the raw data buffer * @return The hex string. */ CoreExport std::string hex(const unsigned char *raw, size_t rawsz); /** This typedef declares irc::string based upon irc_char_traits. */ typedef std::basic_string > string; /** irc::stringjoiner joins string lists into a string, using * the given seperator string. * This class can join a vector of std::string, a deque of * std::string, or a const char* const* array, using overloaded * constructors. */ class CoreExport stringjoiner : public classbase { private: /** Output string */ std::string joined; public: /** Join elements of a vector, between (and including) begin and end * @param seperator The string to seperate values with * @param sequence One or more items to seperate * @param begin The starting element in the sequence to be joined * @param end The ending element in the sequence to be joined */ stringjoiner(const std::string &seperator, const std::vector &sequence, int begin, int end); /** Join elements of a deque, between (and including) begin and end * @param seperator The string to seperate values with * @param sequence One or more items to seperate * @param begin The starting element in the sequence to be joined * @param end The ending element in the sequence to be joined */ stringjoiner(const std::string &seperator, const std::deque &sequence, int begin, int end); /** Join elements of an array of char arrays, between (and including) begin and end * @param seperator The string to seperate values with * @param sequence One or more items to seperate * @param begin The starting element in the sequence to be joined * @param end The ending element in the sequence to be joined */ stringjoiner(const std::string &seperator, const char* const* sequence, int begin, int end); /** Get the joined sequence * @return A reference to the joined string */ std::string& GetJoined(); }; /** irc::modestacker stacks mode sequences into a list. * It can then reproduce this list, clamped to a maximum of MAXMODES * values per line. */ class CoreExport modestacker : public classbase { private: InspIRCd* ServerInstance; /** The mode sequence and its parameters */ std::deque sequence; /** True if the mode sequence is initially adding * characters, false if it is initially removing * them */ bool adding; public: /** Construct a new modestacker. * @param add True if the stack is adding modes, * false if it is removing them */ modestacker(InspIRCd* Instance, bool add); /** Push a modeletter and its parameter onto the stack. * No checking is performed as to if this mode actually * requires a parameter. If you stack invalid mode * sequences, they will be tidied if and when they are * passed to a mode parser. * @param modeletter The mode letter to insert * @param parameter The parameter for the mode */ void Push(char modeletter, const std::string ¶meter); /** Push a modeletter without parameter onto the stack. * No checking is performed as to if this mode actually * requires a parameter. If you stack invalid mode * sequences, they will be tidied if and when they are * passed to a mode parser. * @param modeletter The mode letter to insert */ void Push(char modeletter); /** Push a '+' symbol onto the stack. */ void PushPlus(); /** Push a '-' symbol onto the stack. */ void PushMinus(); /** Return zero or more elements which form the * mode line. This will be clamped to a max of * MAXMODES items (MAXMODES-1 mode parameters and * one mode sequence string), and max_line_size * characters. As specified below, this function * should be called in a loop until it returns zero, * indicating there are no more modes to return. * @param result The deque to populate. This will * be cleared before it is used. * @param max_line_size The maximum size of the line * to build, in characters, seperate to MAXMODES. * @return The number of elements in the deque. * The function should be called repeatedly until it * returns 0, in case there are multiple lines of * mode changes to be obtained. */ int GetStackedLine(std::deque &result, int max_line_size = 360); }; /** 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 CoreExport tokenstream : public classbase { private: /** Original string */ std::string tokens; /** Last position of a seperator token */ std::string::iterator last_starting_position; /** Current string position */ std::string::iterator n; /** True if the last value was an ending value */ 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 as a std::string * @param token The next token available, or an empty string if none remain * @return True if tokens are left to be read, false if the last token was just retrieved. */ bool GetToken(std::string &token); /** Fetch the next token from the stream as an irc::string * @param token The next token available, or an empty string if none remain * @return True if tokens are left to be read, false if the last token was just retrieved. */ bool GetToken(irc::string &token); /** Fetch the next token from the stream as an integer * @param token The next token available, or undefined if none remain * @return True if tokens are left to be read, false if the last token was just retrieved. */ bool GetToken(int &token); /** Fetch the next token from the stream as a long integer * @param token The next token available, or undefined if none remain * @return True if tokens are left to be read, false if the last token was just retrieved. */ bool GetToken(long &token); }; /** irc::sepstream allows for splitting token seperated lists. * Each successive call to sepstream::GetToken() returns * the next token, until none remain, at which point the method returns * an empty string. */ class CoreExport sepstream : public classbase { private: /** Original string. */ std::string tokens; /** Last position of a seperator token */ std::string::iterator last_starting_position; /** Current string position */ std::string::iterator n; /** Seperator value */ char sep; public: /** Create a sepstream and fill it with the provided data */ sepstream(const std::string &source, char seperator); virtual ~sepstream(); /** Fetch the next token from the stream * @param token The next token from the stream is placed here * @return True if tokens still remain, false if there are none left */ virtual bool GetToken(std::string &token); /** Fetch the entire remaining stream, without tokenizing * @return The remaining part of the stream */ virtual const std::string GetRemaining(); /** Returns true if the end of the stream has been reached * @return True if the end of the stream has been reached, otherwise false */ virtual bool StreamEnd(); }; /** A derived form of sepstream, which seperates on commas */ class CoreExport commasepstream : public sepstream { public: /** Initialize with comma seperator */ commasepstream(const std::string &source) : sepstream(source, ',') { } }; /** A derived form of sepstream, which seperates on spaces */ class CoreExport spacesepstream : public sepstream { public: /** Initialize with space seperator */ spacesepstream(const std::string &source) : sepstream(source, ' ') { } }; /** The portparser class seperates out a port range into integers. * A port range may be specified in the input string in the form * "6660,6661,6662-6669,7020". The end of the stream is indicated by * a return value of 0 from portparser::GetToken(). If you attempt * to specify an illegal range (e.g. one where start >= end, or * start or end < 0) then GetToken() will return the first element * of the pair of numbers. */ class CoreExport portparser : public classbase { private: /** Used to split on commas */ commasepstream* sep; /** Current position in a range of ports */ long in_range; /** Starting port in a range of ports */ long range_begin; /** Ending port in a range of ports */ long range_end; /** Allow overlapped port ranges */ bool overlapped; /** Used to determine overlapping of ports * without O(n) algorithm being used */ std::map overlap_set; /** Returns true if val overlaps an existing range */ bool Overlaps(long val); public: /** Create a portparser and fill it with the provided data * @param source The source text to parse from * @param allow_overlapped Allow overlapped ranges */ portparser(const std::string &source, bool allow_overlapped = true); /** Frees the internal commasepstream object */ ~portparser(); /** Fetch the next token from the stream * @return The next port number is returned, or 0 if none remain */ long GetToken(); }; /** Used to hold a bitfield definition in dynamicbitmask. * You must be allocated one of these by dynamicbitmask::Allocate(), * you should not fill the values yourself! */ typedef std::pair bitfield; /** The irc::dynamicbitmask class is used to maintain a bitmap of * boolean values, which can grow to any reasonable size no matter * how many bitfields are in it. * * It starts off at 32 bits in size, large enough to hold 32 boolean * values, with a memory allocation of 8 bytes. If you allocate more * than 32 bits, the class will grow the bitmap by 8 bytes at a time * for each set of 8 bitfields you allocate with the Allocate() * method. * * This method is designed so that multiple modules can be allocated * bit values in a bitmap dynamically, rather than having to define * costs in a fixed size unsigned integer and having the possibility * of collisions of values in different third party modules. * * IMPORTANT NOTE: * * To use this class, you must derive from it. * This is because each derived instance has its own freebits array * which can determine what bitfields are allocated on a TYPE BY TYPE * basis, e.g. an irc::dynamicbitmask type for Users, and one for * Channels, etc. You should inheret it in a very simple way as follows. * The base class will resize and maintain freebits as required, you are * just required to make the pointer static and specific to this class * type. * * \code * class mydbitmask : public irc::dynamicbitmask * { * private: * * static unsigned char* freebits; * * public: * * mydbitmask() : irc::dynamicbitmask() * { * freebits = new unsigned char[this->bits_size]; * memset(freebits, 0, this->bits_size); * } * * ~mydbitmask() * { * delete[] freebits; * } * * unsigned char* GetFreeBits() * { * return freebits; * } * * void SetFreeBits(unsigned char* freebt) * { * freebits = freebt; * } * }; * \endcode */ class CoreExport dynamicbitmask : public classbase { private: /** Data bits. We start with four of these, * and we grow the bitfield as we allocate * more than 32 entries with Allocate(). */ unsigned char* bits; protected: /** Current set size (size of freebits and bits). * Both freebits and bits will ALWAYS be the * same length. */ unsigned char bits_size; public: /** Allocate the initial memory for bits and * freebits and zero the memory. */ dynamicbitmask(); /** Free the memory used by bits and freebits */ virtual ~dynamicbitmask(); /** Allocate an irc::bitfield. * @return An irc::bitfield which can be used * with Get, Deallocate and Toggle methods. * @throw Can throw std::bad_alloc if there is * no ram left to grow the bitmask. */ bitfield Allocate(); /** Deallocate an irc::bitfield. * @param An irc::bitfield to deallocate. * @return True if the bitfield could be * deallocated, false if it could not. */ bool Deallocate(bitfield &pos); /** Toggle the value of a bitfield. * @param pos A bitfield to allocate, previously * allocated by dyamicbitmask::Allocate(). * @param state The state to set the field to. */ void Toggle(bitfield &pos, bool state); /** Get the value of a bitfield. * @param pos A bitfield to retrieve, previously * allocated by dyamicbitmask::Allocate(). * @return The value of the bitfield. * @throw Will throw ModuleException if the bitfield * you provide is outside of the range * 0 >= bitfield.first < size_bits. */ bool Get(bitfield &pos); /** Return the size in bytes allocated to the bits * array. * Note that the actual allocation is twice this, * as there are an equal number of bytes allocated * for the freebits array. */ unsigned char GetSize(); /** Get free bits mask */ virtual unsigned char* GetFreeBits() { return NULL; } /** Set free bits mask */ virtual void SetFreeBits(unsigned char* freebits) { freebits = freebits; } }; /** Turn _ characters in a string into spaces * @param n String to translate * @return The new value with _ translated to space. */ CoreExport const char* Spacify(const char* n); } /* 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 */ /** Operator << for irc::string */ inline std::ostream& operator<<(std::ostream &os, const irc::string &str) { return os << str.c_str(); } /** Operator >> for irc::string */ inline std::istream& operator>>(std::istream &is, irc::string &str) { std::string tmp; is >> tmp; str = tmp.c_str(); return is; } /* Define operators for + and == with irc::string to std::string for easy assignment * and comparison * * Operator + */ inline std::string operator+ (std::string& leftval, irc::string& rightval) { return leftval + std::string(rightval.c_str()); } /* Define operators for + and == with irc::string to std::string for easy assignment * and comparison * * Operator + */ inline irc::string operator+ (irc::string& leftval, std::string& rightval) { return leftval + irc::string(rightval.c_str()); } /* Define operators for + and == with irc::string to std::string for easy assignment * and comparison * * Operator == */ inline bool operator== (const std::string& leftval, const irc::string& rightval) { return (leftval.c_str() == rightval); } /* Define operators for + and == with irc::string to std::string for easy assignment * and comparison * * Operator == */ inline bool operator== (const irc::string& leftval, const std::string& rightval) { return (leftval == rightval.c_str()); } /* Define operators != for irc::string to std::string for easy comparison */ inline bool operator!= (const irc::string& leftval, const std::string& rightval) { return !(leftval == rightval.c_str()); } /* Define operators != for std::string to irc::string for easy comparison */ inline bool operator!= (const std::string& leftval, const irc::string& rightval) { return !(leftval.c_str() == rightval); } // FIXME MAXBUF messes up these #if 0 template static inline bool operator == (std::string const &lhs, char const (&rhs)[N]) { return lhs.length() == N - 1 && !std::memcmp(lhs.data(), rhs, N - 1); } template static inline bool operator != (std::string const &lhs, char const (&rhs)[N]) { return !(lhs == rhs); } #endif /** Assign an irc::string to a std::string. */ inline std::string assign(const irc::string &other) { return other.c_str(); } /** Assign a std::string to an irc::string. */ inline irc::string assign(const std::string &other) { return other.c_str(); } /** Trim the leading and trailing spaces from a std::string. */ inline std::string& trim(std::string &str) { std::string::size_type start = str.find_first_not_of(" "); std::string::size_type end = str.find_last_not_of(" "); if (start == std::string::npos || end == std::string::npos) str = ""; else str = str.substr(start, end-start+1); return str; } /** Hashing stuff is totally different on vc++'s hash_map implementation, so to save a buttload of * #ifdefs we'll just do it all at once */ BEGIN_HASHMAP_NAMESPACE /** Hashing function to hash irc::string */ #ifdef WINDOWS template<> class CoreExport hash_compare > { public: enum { bucket_size = 4, min_buckets = 8 }; /* Got these numbers from the CRT source, if anyone wants to change them feel free. */ /** Compare two irc::string values for hashing in hash_map */ bool operator()(const irc::string & s1, const irc::string & s2) const { if(s1.length() != s2.length()) return true; return (irc::irc_char_traits::compare(s1.c_str(), s2.c_str(), s1.length()) < 0); } /** Hash an irc::string value for hash_map */ size_t operator()(const irc::string & s) const; }; template<> class CoreExport hash_compare > { public: enum { bucket_size = 4, min_buckets = 8 }; /* Again, from the CRT source */ /** Compare two std::string values for hashing in hash_map */ bool operator()(const std::string & s1, const std::string & s2) const { if(s1.length() != s2.length()) return true; return (irc::irc_char_traits::compare(s1.c_str(), s2.c_str(), s1.length()) < 0); } /** Hash a std::string using RFC1459 case sensitivity rules * @param s A string to hash * @return The hash value */ size_t operator()(const std::string & s) const; }; #else template<> struct hash { /** Hash an irc::string using RFC1459 case sensitivity rules * @param s A string to hash * @return The hash value */ size_t operator()(const irc::string &s) const; }; /* XXX FIXME: Implement a hash function overriding std::string's that works with TR1! */ #ifdef HASHMAP_DEPRECATED struct insensitive #else template<> struct hash #endif { size_t operator()(const std::string &s) const; }; #endif /** Convert a string to lower case respecting RFC1459 * @param n A string to lowercase */ void strlower(char *n); END_HASHMAP_NAMESPACE #endif