mirror of
https://github.com/matrix-construct/construct
synced 2024-08-20 00:24:44 +02:00
694 lines
15 KiB
C++
694 lines
15 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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/// !!! NOTE !!!
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///
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/// Many functions implemented here need to be replaced with karma generators
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/// similar to ircd::fmt. Both the boost and std lexical conversions are an
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/// order of magnitude slower than the formal generators. Some tokenizations
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/// can also be replaced.
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///
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#include <boost/tokenizer.hpp>
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#include <boost/lexical_cast.hpp>
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///////////////////////////////////////////////////////////////////////////////
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//
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// ircd/tokens.h
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//
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ircd::string_view
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ircd::tokens_after(const string_view &str,
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const char &sep,
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const size_t &i)
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{
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const char ssep[2] { sep, '\0' };
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return tokens_after(str, ssep, i);
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}
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ircd::string_view
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ircd::tokens_after(const string_view &str,
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const char *const &sep,
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const size_t &i)
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{
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using type = string_view;
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using iter = typename type::const_iterator;
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using delim = boost::char_separator<char>;
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const delim d(sep);
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const boost::tokenizer<delim, iter, type> view(str, d);
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auto it(begin(view));
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for(size_t j(0); it != end(view); ++it, j++)
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if(j > i)
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return string_view{it->data(), str.data() + str.size()};
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return {};
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}
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ircd::string_view
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ircd::token_first(const string_view &str,
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const char &sep)
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{
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const char ssep[2] { sep, '\0' };
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return token(str, ssep, 0);
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}
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ircd::string_view
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ircd::token_first(const string_view &str,
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const char *const &sep)
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{
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return token(str, sep, 0);
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}
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ircd::string_view
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ircd::token_last(const string_view &str,
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const char &sep)
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{
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const char ssep[2] { sep, '\0' };
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return token_last(str, ssep);
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}
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ircd::string_view
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ircd::token_last(const string_view &str,
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const char *const &sep)
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{
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using type = string_view;
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using iter = typename type::const_iterator;
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using delim = boost::char_separator<char>;
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const delim d(sep);
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const boost::tokenizer<delim, iter, type> view(str, d);
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auto it(begin(view));
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if(it == end(view))
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return str.empty()? str : throw std::out_of_range("token out of range");
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string_view ret(*it);
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for(++it; it != end(view); ++it)
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ret = *it;
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return ret;
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}
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ircd::string_view
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ircd::token(const string_view &str,
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const char &sep,
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const size_t &i)
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{
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const char ssep[2] { sep, '\0' };
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return token(str, ssep, i);
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}
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ircd::string_view
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ircd::token(const string_view &str,
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const char *const &sep,
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const size_t &i)
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{
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using type = string_view;
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using iter = typename type::const_iterator;
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using delim = boost::char_separator<char>;
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const delim d(sep);
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const boost::tokenizer<delim, iter, type> view(str, d);
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const auto it(at(begin(view), end(view), i));
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return *it;
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}
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size_t
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ircd::token_count(const string_view &str,
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const char &sep)
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{
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const char ssep[2] { sep, '\0' };
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return token_count(str, ssep);
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}
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size_t
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ircd::token_count(const string_view &str,
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const char *const &sep)
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{
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using type = string_view;
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using iter = typename type::const_iterator;
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using delim = boost::char_separator<char>;
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const delim d(sep);
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const boost::tokenizer<delim, iter, type> view(str, d);
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return std::distance(begin(view), end(view));
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}
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size_t
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ircd::tokens(const string_view &str,
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const char &sep,
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const mutable_buffer &buf,
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const token_view &closure)
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{
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const char ssep[2] { sep, '\0' };
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return tokens(str, ssep, buf, closure);
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}
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size_t
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ircd::tokens(const string_view &str,
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const char *const &sep,
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const mutable_buffer &buf,
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const token_view &closure)
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{
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char *ptr(data(buf));
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char *const stop(data(buf) + size(buf));
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tokens(str, sep, [&closure, &ptr, &stop]
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(const string_view &token)
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{
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const size_t terminated_size(token.size() + 1);
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const size_t remaining(std::distance(ptr, stop));
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if(remaining < terminated_size)
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return;
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char *const dest(ptr);
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ptr += strlcpy(dest, token.data(), terminated_size);
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closure(string_view(dest, token.size()));
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});
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return std::distance(data(buf), ptr);
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}
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size_t
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ircd::tokens(const string_view &str,
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const char &sep,
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const size_t &limit,
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const token_view &closure)
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{
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const char ssep[2] { sep, '\0' };
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return tokens(str, ssep, limit, closure);
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}
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size_t
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ircd::tokens(const string_view &str,
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const char *const &sep,
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const size_t &limit,
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const token_view &closure)
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{
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using type = string_view;
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using iter = typename type::const_iterator;
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using delim = boost::char_separator<char>;
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const delim d(sep);
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const boost::tokenizer<delim, iter, type> view(str, d);
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size_t i(0);
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for(auto it(begin(view)); i < limit && it != end(view); ++it, i++)
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closure(*it);
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return i;
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}
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void
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ircd::tokens(const string_view &str,
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const char &sep,
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const token_view &closure)
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{
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const char ssep[2] { sep, '\0' };
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tokens(str, ssep, closure);
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}
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void
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ircd::tokens(const string_view &str,
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const char *const &sep,
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const token_view &closure)
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{
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using type = string_view;
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using iter = typename type::const_iterator;
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using delim = boost::char_separator<char>;
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const delim d(sep);
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const boost::tokenizer<delim, iter, type> view(str, d);
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std::for_each(begin(view), end(view), closure);
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// ircd/lex_cast.h
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//
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namespace ircd
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{
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/// The static lex_cast ring buffers are each LEX_CAST_BUFSIZE bytes;
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/// Consider increasing if some lex_cast<T>(str) has more characters.
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const size_t LEX_CAST_BUFSIZE {64};
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/// This is a static "ring buffer" to simplify a majority of lex_cast uses.
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/// If the lex_cast has binary input and string output, and no user buffer
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/// is supplied, the next buffer here will be used instead. The returned
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/// string_view of data from this buffer is only valid for several more
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/// calls to lex_cast before it is overwritten.
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thread_local char lex_cast_buf[LEX_CAST_BUFS][LEX_CAST_BUFSIZE];
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thread_local uint lex_cast_cur;
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template<size_t N, class T> static string_view _lex_cast(const T &i, mutable_buffer buf);
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template<class T> static T _lex_cast(const string_view &s);
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}
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/// Internal template providing conversions from a number to a string;
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/// potentially using the ring buffer if no user buffer is supplied.
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template<size_t N,
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class T>
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ircd::string_view
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ircd::_lex_cast(const T &i,
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mutable_buffer buf)
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try
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{
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using array = std::array<char, N>;
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if(!buf)
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{
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buf = lex_cast_buf[lex_cast_cur++];
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lex_cast_cur %= LEX_CAST_BUFS;
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}
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assert(size(buf) >= N);
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auto &a(*reinterpret_cast<array *>(data(buf)));
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a = boost::lexical_cast<array>(i);
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return { data(buf), strnlen(data(buf), size(buf)) };
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}
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catch(const boost::bad_lexical_cast &e)
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{
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throw ircd::bad_lex_cast("%s", e.what());
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}
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/// Internal template providing conversions from a string to a number;
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/// the native object is returned directly; no ring buffer is consumed.
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template<class T>
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T
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ircd::_lex_cast(const string_view &s)
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try
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{
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return boost::lexical_cast<T>(s);
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}
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catch(const boost::bad_lexical_cast &e)
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{
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throw ircd::bad_lex_cast("%s", e.what());
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}
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template<> ircd::string_view
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ircd::lex_cast(bool i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(8);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(int8_t i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(8);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(uint8_t i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(8);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(short i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(8);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(ushort i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(8);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(int i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(16);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(uint i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(16);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(long i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(32);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(ulong i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(32);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(double i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(64);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(long double i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(64);
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return _lex_cast<MAX>(i, buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(nanoseconds i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(64);
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return _lex_cast<MAX>(i.count(), buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(microseconds i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(64);
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return _lex_cast<MAX>(i.count(), buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(milliseconds i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(64);
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return _lex_cast<MAX>(i.count(), buf);
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}
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template<> ircd::string_view
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ircd::lex_cast(seconds i,
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const mutable_buffer &buf)
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{
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static const size_t MAX(64);
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return _lex_cast<MAX>(i.count(), buf);
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}
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template<> bool
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ircd::lex_cast(const string_view &s)
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{
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return s == "true"? true:
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s == "false"? false:
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_lex_cast<bool>(s);
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}
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template<> int8_t
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ircd::lex_cast(const string_view &s)
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{
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return _lex_cast<char>(s);
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}
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template<> uint8_t
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ircd::lex_cast(const string_view &s)
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{
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return _lex_cast<unsigned char>(s);
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}
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template<> short
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ircd::lex_cast(const string_view &s)
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{
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return _lex_cast<short>(s);
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}
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template<> unsigned short
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ircd::lex_cast(const string_view &s)
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{
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return _lex_cast<unsigned short>(s);
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}
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template<> int
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ircd::lex_cast(const string_view &s)
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{
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return _lex_cast<int>(s);
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}
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template<> unsigned int
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ircd::lex_cast(const string_view &s)
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{
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return _lex_cast<unsigned int>(s);
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}
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template<> long
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ircd::lex_cast(const string_view &s)
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{
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return _lex_cast<long>(s);
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}
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template<> unsigned long
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ircd::lex_cast(const string_view &s)
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{
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return _lex_cast<unsigned long>(s);
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}
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template<> double
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ircd::lex_cast(const string_view &s)
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{
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return _lex_cast<double>(s);
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}
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template<> long double
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ircd::lex_cast(const string_view &s)
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{
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return _lex_cast<long double>(s);
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}
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template<> ircd::nanoseconds
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ircd::lex_cast(const string_view &s)
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{
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return std::chrono::duration<time_t, std::ratio<1L, 1000000000L>>(_lex_cast<time_t>(s));
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}
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template<> ircd::microseconds
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ircd::lex_cast(const string_view &s)
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{
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return std::chrono::duration<time_t, std::ratio<1L, 1000000L>>(_lex_cast<time_t>(s));
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}
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template<> ircd::milliseconds
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ircd::lex_cast(const string_view &s)
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{
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return std::chrono::duration<time_t, std::ratio<1L, 1000L>>(_lex_cast<time_t>(s));
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}
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template<> ircd::seconds
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ircd::lex_cast(const string_view &s)
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{
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return std::chrono::duration<time_t, std::ratio<1L, 1L>>(_lex_cast<time_t>(s));
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}
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template<> bool
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ircd::try_lex_cast<bool>(const string_view &s)
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{
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bool i;
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return boost::conversion::try_lexical_convert(s, i);
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}
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template<> bool
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ircd::try_lex_cast<int8_t>(const string_view &s)
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{
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int8_t i;
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return boost::conversion::try_lexical_convert(s, i);
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}
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template<> bool
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ircd::try_lex_cast<uint8_t>(const string_view &s)
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{
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uint8_t i;
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return boost::conversion::try_lexical_convert(s, i);
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}
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template<> bool
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ircd::try_lex_cast<short>(const string_view &s)
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{
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short i;
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return boost::conversion::try_lexical_convert(s, i);
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}
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template<> bool
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ircd::try_lex_cast<ushort>(const string_view &s)
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{
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ushort i;
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return boost::conversion::try_lexical_convert(s, i);
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}
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template<> bool
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ircd::try_lex_cast<int>(const string_view &s)
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{
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int i;
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return boost::conversion::try_lexical_convert(s, i);
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}
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template<> bool
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ircd::try_lex_cast<unsigned int>(const string_view &s)
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{
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unsigned int i;
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return boost::conversion::try_lexical_convert(s, i);
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}
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template<> bool
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ircd::try_lex_cast<long>(const string_view &s)
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{
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long i;
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return boost::conversion::try_lexical_convert(s, i);
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}
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|
|
template<> bool
|
|
ircd::try_lex_cast<unsigned long>(const string_view &s)
|
|
{
|
|
unsigned long i;
|
|
return boost::conversion::try_lexical_convert(s, i);
|
|
}
|
|
|
|
template<> bool
|
|
ircd::try_lex_cast<double>(const string_view &s)
|
|
{
|
|
double i;
|
|
return boost::conversion::try_lexical_convert(s, i);
|
|
}
|
|
|
|
template<> bool
|
|
ircd::try_lex_cast<long double>(const string_view &s)
|
|
{
|
|
long double i;
|
|
return boost::conversion::try_lexical_convert(s, i);
|
|
}
|
|
|
|
template<> bool
|
|
ircd::try_lex_cast<ircd::nanoseconds>(const string_view &s)
|
|
{
|
|
time_t i; //TODO: XXX
|
|
return boost::conversion::try_lexical_convert(s, i);
|
|
}
|
|
|
|
template<> bool
|
|
ircd::try_lex_cast<ircd::microseconds>(const string_view &s)
|
|
{
|
|
time_t i; //TODO: XXX
|
|
return boost::conversion::try_lexical_convert(s, i);
|
|
}
|
|
|
|
template<> bool
|
|
ircd::try_lex_cast<ircd::milliseconds>(const string_view &s)
|
|
{
|
|
time_t i; //TODO: XXX
|
|
return boost::conversion::try_lexical_convert(s, i);
|
|
}
|
|
|
|
template<> bool
|
|
ircd::try_lex_cast<ircd::seconds>(const string_view &s)
|
|
{
|
|
time_t i; //TODO: XXX
|
|
return boost::conversion::try_lexical_convert(s, i);
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// ircd/stringops.h
|
|
//
|
|
|
|
std::string
|
|
ircd::replace(const string_view &s,
|
|
const char &before,
|
|
const string_view &after)
|
|
{
|
|
const auto occurs
|
|
{
|
|
std::count(begin(s), end(s), before)
|
|
};
|
|
|
|
const size_t size
|
|
{
|
|
occurs? s.size() + (occurs * after.size()):
|
|
s.size() - occurs
|
|
};
|
|
|
|
return string(size, [&s, &before, &after]
|
|
(const mutable_buffer &buf)
|
|
{
|
|
char *p{begin(buf)};
|
|
std::for_each(begin(s), end(s), [&before, &after, &p]
|
|
(const char &c)
|
|
{
|
|
if(c == before)
|
|
{
|
|
memcpy(p, after.data(), after.size());
|
|
p += after.size();
|
|
}
|
|
else *p++ = c;
|
|
});
|
|
|
|
return std::distance(begin(buf), p);
|
|
});
|
|
}
|
|
|
|
std::string
|
|
ircd::u2a(const const_buffer &in)
|
|
{
|
|
return string(size(in) * 2, [&in]
|
|
(const mutable_buffer &out)
|
|
{
|
|
return u2a(out, in);
|
|
});
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::u2a(const mutable_buffer &out,
|
|
const const_buffer &in)
|
|
{
|
|
char *p(data(out));
|
|
for(size_t i(0); i < size(in); ++i)
|
|
p += snprintf(p, size(out) - (p - data(out)), "%02x", in[i]);
|
|
|
|
return { data(out), size_t(p - data(out)) };
|
|
}
|
|
|
|
ircd::const_buffer
|
|
ircd::a2u(const mutable_buffer &out,
|
|
const const_buffer &in)
|
|
{
|
|
const size_t len{size(in) / 2};
|
|
for(size_t i(0); i < len; ++i)
|
|
{
|
|
const char gl[3]
|
|
{
|
|
in[i * 2],
|
|
in[i * 2 + 1],
|
|
'\0'
|
|
};
|
|
|
|
out[i] = strtol(gl, nullptr, 16);
|
|
}
|
|
|
|
return { data(out), len };
|
|
}
|