mirror of
https://github.com/matrix-construct/construct
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234 lines
7.1 KiB
C++
234 lines
7.1 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_RFC1459_H
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/// Legacy IRC grammars & tools
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namespace ircd::rfc1459
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{
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struct nick;
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struct user;
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struct host;
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struct cmd;
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struct parv;
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struct pfx;
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struct line;
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IRCD_EXCEPTION(ircd::error, error)
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IRCD_EXCEPTION(error, syntax_error)
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std::ostream &operator<<(std::ostream &, const pfx &);
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std::ostream &operator<<(std::ostream &, const cmd &);
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std::ostream &operator<<(std::ostream &, const parv &);
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std::ostream &operator<<(std::ostream &, const line &); // unterminated
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}
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namespace ircd::rfc1459::character
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{
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enum attr :uint;
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using attr_t = std::underlying_type<attr>::type;
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extern const std::array<attr_t, 256> attrs;
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extern const std::array<unsigned char, 256> tolower_tab;
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extern const std::array<unsigned char, 256> toupper_tab;
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// Tests
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bool is(const uint8_t &c, const attr &attr);
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// Transforms
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const uint8_t &tolower(const uint8_t &c);
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const uint8_t &toupper(const uint8_t &c);
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// Get all characters for an attribute mask
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size_t gather(const attr &attr, uint8_t *const &buf, const size_t &max);
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std::string gather(const attr &attr);
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// Like gather() but with special considerations for boost::spirit's char_()
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size_t charset(const attr &attr, uint8_t *const &buf, const size_t &max);
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std::string charset(const attr &attr);
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}
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enum ircd::rfc1459::character::attr
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:uint
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{
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PRINT = 0x00000001,
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CNTRL = 0x00000002,
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ALPHA = 0x00000004,
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PUNCT = 0x00000008,
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DIGIT = 0x00000010,
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SPACE = 0x00000020,
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NICK = 0x00000040,
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CHAN = 0x00000080,
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KWILD = 0x00000100,
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CHANPFX = 0x00000200,
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USER = 0x00000400,
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HOST = 0x00000800,
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NONEOS = 0x00001000,
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SERV = 0x00002000,
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EOL = 0x00004000,
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MWILD = 0x00008000,
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LET = 0x00010000, // an actual letter
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FCHAN = 0x00020000, // a 'fake' channel char
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};
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namespace ircd::rfc1459
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{
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struct less;
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using character::is;
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using character::toupper;
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using character::tolower;
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using character::gather;
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inline bool is_print(const char &c) { return is(c, character::PRINT); }
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inline bool is_host(const char &c) { return is(c, character::HOST); }
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inline bool is_user(const char &c) { return is(c, character::USER); }
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inline bool is_chan(const char &c) { return is(c, character::CHAN); }
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inline bool is_chan_prefix(const char &c) { return is(c, character::CHANPFX); }
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inline bool is_fake_chan(const char &c) { return is(c, character::FCHAN); }
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inline bool is_kwild(const char &c) { return is(c, character::KWILD); }
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inline bool is_mwild(const char &c) { return is(c, character::MWILD); }
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inline bool is_nick(const char &c) { return is(c, character::NICK); }
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inline bool is_letter(const char &c) { return is(c, character::LET); }
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inline bool is_digit(const char &c) { return is(c, character::DIGIT); }
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inline bool is_cntrl(const char &c) { return is(c, character::CNTRL); }
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inline bool is_alpha(const char &c) { return is(c, character::ALPHA); }
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inline bool is_space(const char &c) { return is(c, character::SPACE); }
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inline bool is_noneos(const char &c) { return is(c, character::NONEOS); }
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inline bool is_eol(const char &c) { return is(c, character::EOL); }
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inline bool is_serv(const char &c) { return is(c, character::SERV) || is_nick(c); }
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inline bool is_id(const char &c) { return is_digit(c) || is_letter(c); }
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inline bool is_alnum(const char &c) { return is_digit(c) || is_alpha(c); }
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inline bool is_punct(const char &c) { return !is_cntrl(c) && !is_alnum(c); }
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inline bool is_lower(const char &c) { return is_alpha(c) && uint8_t(c) > 0x5f; }
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inline bool is_upper(const char &c) { return is_alpha(c) && uint8_t(c) < 0x60; }
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inline bool is_graph(const char &c) { return is_print(c) && uint8_t(c) != 0x32; }
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inline bool is_ascii(const char &c) { return uint8_t(c) < 0x80; }
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inline bool is_xdigit(const char &c)
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{
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return is_digit(c) || ('a' <= c && c <= 'f') || ('A' <= c && c <= 'F');
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}
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}
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struct ircd::rfc1459::nick
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:string_view
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{
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using string_view::string_view;
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};
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struct ircd::rfc1459::user
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:string_view
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{
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using string_view::string_view;
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};
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struct ircd::rfc1459::host
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:string_view
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{
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using string_view::string_view;
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};
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struct ircd::rfc1459::cmd
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:string_view
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{
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using string_view::string_view;
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};
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struct ircd::rfc1459::parv
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:std::vector<string_view>
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{
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using std::vector<string_view>::vector;
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};
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struct ircd::rfc1459::pfx
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{
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struct nick nick;
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struct user user;
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struct host host;
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bool empty() const;
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};
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struct ircd::rfc1459::line
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{
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struct pfx pfx;
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struct cmd cmd;
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struct parv parv;
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bool empty() const;
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auto operator[](const size_t &pos) const { return parv.at(pos); }
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auto operator[](const size_t &pos) { return parv.at(pos); }
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line(const char *&start, const char *const &stop);
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line() = default;
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};
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struct ircd::rfc1459::less
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{
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bool operator()(const char *const &a, const char *const &b) const;
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bool operator()(const std::string &a, const std::string &b) const;
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bool operator()(const std::string_view &a, const std::string_view &b) const;
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};
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inline bool
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ircd::rfc1459::less::operator()(const std::string_view &a,
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const std::string_view &b)
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const
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{
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return std::lexicographical_compare(begin(a), end(a), begin(b), end(b), []
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(const char &a, const char &b)
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{
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return tolower(a) < tolower(b);
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});
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}
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inline bool
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ircd::rfc1459::less::operator()(const std::string &a,
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const std::string &b)
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const
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{
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return std::lexicographical_compare(begin(a), end(a), begin(b), end(b), []
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(const char &a, const char &b)
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{
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return tolower(a) < tolower(b);
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});
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}
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inline bool
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ircd::rfc1459::less::operator()(const char *const &a,
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const char *const &b)
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const
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{
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return std::lexicographical_compare(a, a + strlen(a), b, b + strlen(b), []
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(const char &a, const char &b)
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{
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return tolower(a) < tolower(b);
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});
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}
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inline const uint8_t &
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ircd::rfc1459::character::tolower(const uint8_t &c)
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{
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return tolower_tab[c];
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}
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inline const uint8_t &
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ircd::rfc1459::character::toupper(const uint8_t &c)
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{
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return toupper_tab[c];
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}
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inline bool
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ircd::rfc1459::character::is(const uint8_t &c,
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const attr &attr)
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{
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return (attrs[c] & attr) == attr;
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}
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