mirror of
https://github.com/matrix-construct/construct
synced 2024-06-13 07:28:58 +02:00
984 lines
21 KiB
C++
984 lines
21 KiB
C++
/*
|
|
* charybdis: an advanced ircd.
|
|
* inline/stringops.h: inlined string operations used in a few places
|
|
*
|
|
* Copyright (C) 2005-2016 Charybdis Development Team
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
|
|
* USA
|
|
*/
|
|
|
|
/// !!! NOTE !!!
|
|
///
|
|
/// Many functions implemented here need to be replaced with karma generators
|
|
/// similar to ircd::fmt. Both the boost and std lexical conversions are an
|
|
/// order of magnitude slower than the formal generators. Some tokenizations
|
|
/// can also be replaced.
|
|
///
|
|
|
|
#include <RB_INC_BOOST_TOKENIZER_HPP
|
|
#include <RB_INC_BOOST_LEXICAL_CAST_HPP
|
|
#include <boost/archive/iterators/base64_from_binary.hpp>
|
|
#include <boost/archive/iterators/binary_from_base64.hpp>
|
|
#include <boost/archive/iterators/transform_width.hpp>
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// ircd/tokens.h
|
|
//
|
|
|
|
ircd::string_view
|
|
ircd::tokens_after(const string_view &str,
|
|
const char &sep,
|
|
const size_t &i)
|
|
{
|
|
const char ssep[2] { sep, '\0' };
|
|
return tokens_after(str, ssep, i);
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::tokens_after(const string_view &str,
|
|
const char *const &sep,
|
|
const size_t &i)
|
|
{
|
|
using type = string_view;
|
|
using iter = typename type::const_iterator;
|
|
using delim = boost::char_separator<char>;
|
|
|
|
const delim d(sep);
|
|
const boost::tokenizer<delim, iter, type> view(str, d);
|
|
|
|
auto it(begin(view));
|
|
for(size_t j(0); it != end(view); ++it, j++)
|
|
if(j > i)
|
|
return string_view{it->data(), str.data() + str.size()};
|
|
|
|
return {};
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::token_first(const string_view &str,
|
|
const char &sep)
|
|
{
|
|
const char ssep[2] { sep, '\0' };
|
|
return token(str, ssep, 0);
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::token_first(const string_view &str,
|
|
const char *const &sep)
|
|
{
|
|
return token(str, sep, 0);
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::token_last(const string_view &str,
|
|
const char &sep)
|
|
{
|
|
const char ssep[2] { sep, '\0' };
|
|
return token_last(str, ssep);
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::token_last(const string_view &str,
|
|
const char *const &sep)
|
|
{
|
|
using type = string_view;
|
|
using iter = typename type::const_iterator;
|
|
using delim = boost::char_separator<char>;
|
|
|
|
const delim d(sep);
|
|
const boost::tokenizer<delim, iter, type> view(str, d);
|
|
|
|
auto it(begin(view));
|
|
if(it == end(view))
|
|
return str.empty()? str : throw std::out_of_range("token out of range");
|
|
|
|
string_view ret(*it);
|
|
for(++it; it != end(view); ++it)
|
|
ret = *it;
|
|
|
|
return ret;
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::token(const string_view &str,
|
|
const char &sep,
|
|
const size_t &i)
|
|
{
|
|
const char ssep[2] { sep, '\0' };
|
|
return token(str, ssep, i);
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::token(const string_view &str,
|
|
const char *const &sep,
|
|
const size_t &i)
|
|
{
|
|
using type = string_view;
|
|
using iter = typename type::const_iterator;
|
|
using delim = boost::char_separator<char>;
|
|
|
|
const delim d(sep);
|
|
const boost::tokenizer<delim, iter, type> view(str, d);
|
|
const auto it(at(begin(view), end(view), i));
|
|
return *it;
|
|
}
|
|
|
|
size_t
|
|
ircd::token_count(const string_view &str,
|
|
const char &sep)
|
|
{
|
|
const char ssep[2] { sep, '\0' };
|
|
return token_count(str, ssep);
|
|
}
|
|
|
|
size_t
|
|
ircd::token_count(const string_view &str,
|
|
const char *const &sep)
|
|
{
|
|
using type = string_view;
|
|
using iter = typename type::const_iterator;
|
|
using delim = boost::char_separator<char>;
|
|
|
|
const delim d(sep);
|
|
const boost::tokenizer<delim, iter, type> view(str, d);
|
|
return std::distance(begin(view), end(view));
|
|
}
|
|
|
|
size_t
|
|
ircd::tokens(const string_view &str,
|
|
const char &sep,
|
|
const mutable_buffer &buf,
|
|
const token_view &closure)
|
|
{
|
|
const char ssep[2] { sep, '\0' };
|
|
return tokens(str, ssep, buf, closure);
|
|
}
|
|
|
|
size_t
|
|
ircd::tokens(const string_view &str,
|
|
const char *const &sep,
|
|
const mutable_buffer &buf,
|
|
const token_view &closure)
|
|
{
|
|
char *ptr(data(buf));
|
|
char *const stop(data(buf) + size(buf));
|
|
tokens(str, sep, [&closure, &ptr, &stop]
|
|
(const string_view &token)
|
|
{
|
|
const size_t terminated_size(token.size() + 1);
|
|
const size_t remaining(std::distance(ptr, stop));
|
|
if(remaining < terminated_size)
|
|
return;
|
|
|
|
char *const dest(ptr);
|
|
ptr += strlcpy(dest, token.data(), terminated_size);
|
|
closure(string_view(dest, token.size()));
|
|
});
|
|
|
|
return std::distance(data(buf), ptr);
|
|
}
|
|
|
|
size_t
|
|
ircd::tokens(const string_view &str,
|
|
const char &sep,
|
|
const size_t &limit,
|
|
const token_view &closure)
|
|
{
|
|
const char ssep[2] { sep, '\0' };
|
|
return tokens(str, ssep, limit, closure);
|
|
}
|
|
|
|
size_t
|
|
ircd::tokens(const string_view &str,
|
|
const char *const &sep,
|
|
const size_t &limit,
|
|
const token_view &closure)
|
|
{
|
|
using type = string_view;
|
|
using iter = typename type::const_iterator;
|
|
using delim = boost::char_separator<char>;
|
|
|
|
const delim d(sep);
|
|
const boost::tokenizer<delim, iter, type> view(str, d);
|
|
|
|
size_t i(0);
|
|
for(auto it(begin(view)); i < limit && it != end(view); ++it, i++)
|
|
closure(*it);
|
|
|
|
return i;
|
|
}
|
|
|
|
void
|
|
ircd::tokens(const string_view &str,
|
|
const char &sep,
|
|
const token_view &closure)
|
|
{
|
|
const char ssep[2] { sep, '\0' };
|
|
tokens(str, ssep, closure);
|
|
}
|
|
|
|
void
|
|
ircd::tokens(const string_view &str,
|
|
const char *const &sep,
|
|
const token_view &closure)
|
|
{
|
|
using type = string_view;
|
|
using iter = typename type::const_iterator;
|
|
using delim = boost::char_separator<char>;
|
|
|
|
const delim d(sep);
|
|
const boost::tokenizer<delim, iter, type> view(str, d);
|
|
std::for_each(begin(view), end(view), closure);
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// ircd/lex_cast.h
|
|
//
|
|
|
|
namespace ircd
|
|
{
|
|
/// The static lex_cast ring buffers are each LEX_CAST_BUFSIZE bytes;
|
|
/// Consider increasing if some lex_cast<T>(str) has more characters.
|
|
const size_t LEX_CAST_BUFSIZE {64};
|
|
|
|
/// This is a static "ring buffer" to simplify a majority of lex_cast uses.
|
|
/// If the lex_cast has binary input and string output, and no user buffer
|
|
/// is supplied, the next buffer here will be used instead. The returned
|
|
/// string_view of data from this buffer is only valid for several more
|
|
/// calls to lex_cast before it is overwritten.
|
|
thread_local char lex_cast_buf[LEX_CAST_BUFS][LEX_CAST_BUFSIZE];
|
|
thread_local uint lex_cast_cur;
|
|
|
|
template<size_t N, class T> static string_view _lex_cast(const T &i, mutable_buffer buf);
|
|
template<class T> static T _lex_cast(const string_view &s);
|
|
}
|
|
|
|
/// Internal template providing conversions from a number to a string;
|
|
/// potentially using the ring buffer if no user buffer is supplied.
|
|
template<size_t N,
|
|
class T>
|
|
ircd::string_view
|
|
ircd::_lex_cast(const T &i,
|
|
mutable_buffer buf)
|
|
try
|
|
{
|
|
using array = std::array<char, N>;
|
|
|
|
if(!buf)
|
|
{
|
|
buf = lex_cast_buf[lex_cast_cur++];
|
|
lex_cast_cur %= LEX_CAST_BUFS;
|
|
}
|
|
|
|
assert(size(buf) >= N);
|
|
auto &a(*reinterpret_cast<array *>(data(buf)));
|
|
a = boost::lexical_cast<array>(i);
|
|
return { data(buf), strnlen(data(buf), size(buf)) };
|
|
}
|
|
catch(const boost::bad_lexical_cast &e)
|
|
{
|
|
throw ircd::bad_lex_cast("%s", e.what());
|
|
}
|
|
|
|
/// Internal template providing conversions from a string to a number;
|
|
/// the native object is returned directly; no ring buffer is consumed.
|
|
template<class T>
|
|
T
|
|
ircd::_lex_cast(const string_view &s)
|
|
try
|
|
{
|
|
return boost::lexical_cast<T>(s);
|
|
}
|
|
catch(const boost::bad_lexical_cast &e)
|
|
{
|
|
throw ircd::bad_lex_cast("%s", e.what());
|
|
}
|
|
|
|
template<> ircd::string_view
|
|
ircd::lex_cast(bool i,
|
|
const mutable_buffer &buf)
|
|
{
|
|
static const size_t MAX(8);
|
|
return _lex_cast<MAX>(i, buf);
|
|
}
|
|
|
|
template<> ircd::string_view
|
|
ircd::lex_cast(int8_t i,
|
|
const mutable_buffer &buf)
|
|
{
|
|
static const size_t MAX(8);
|
|
return _lex_cast<MAX>(i, buf);
|
|
}
|
|
|
|
template<> ircd::string_view
|
|
ircd::lex_cast(uint8_t i,
|
|
const mutable_buffer &buf)
|
|
{
|
|
static const size_t MAX(8);
|
|
return _lex_cast<MAX>(i, buf);
|
|
}
|
|
|
|
template<> ircd::string_view
|
|
ircd::lex_cast(short i,
|
|
const mutable_buffer &buf)
|
|
{
|
|
static const size_t MAX(8);
|
|
return _lex_cast<MAX>(i, buf);
|
|
}
|
|
|
|
template<> ircd::string_view
|
|
ircd::lex_cast(ushort i,
|
|
const mutable_buffer &buf)
|
|
{
|
|
static const size_t MAX(8);
|
|
return _lex_cast<MAX>(i, buf);
|
|
}
|
|
|
|
template<> ircd::string_view
|
|
ircd::lex_cast(int i,
|
|
const mutable_buffer &buf)
|
|
{
|
|
static const size_t MAX(16);
|
|
return _lex_cast<MAX>(i, buf);
|
|
}
|
|
|
|
template<> ircd::string_view
|
|
ircd::lex_cast(uint i,
|
|
const mutable_buffer &buf)
|
|
{
|
|
static const size_t MAX(16);
|
|
return _lex_cast<MAX>(i, buf);
|
|
}
|
|
|
|
template<> ircd::string_view
|
|
ircd::lex_cast(long i,
|
|
const mutable_buffer &buf)
|
|
{
|
|
static const size_t MAX(32);
|
|
return _lex_cast<MAX>(i, buf);
|
|
}
|
|
|
|
template<> ircd::string_view
|
|
ircd::lex_cast(ulong i,
|
|
const mutable_buffer &buf)
|
|
{
|
|
static const size_t MAX(32);
|
|
return _lex_cast<MAX>(i, buf);
|
|
}
|
|
|
|
template<> ircd::string_view
|
|
ircd::lex_cast(double i,
|
|
const mutable_buffer &buf)
|
|
{
|
|
static const size_t MAX(64);
|
|
return _lex_cast<MAX>(i, buf);
|
|
}
|
|
|
|
template<> ircd::string_view
|
|
ircd::lex_cast(long double i,
|
|
const mutable_buffer &buf)
|
|
{
|
|
static const size_t MAX(64);
|
|
return _lex_cast<MAX>(i, buf);
|
|
}
|
|
|
|
template<> ircd::string_view
|
|
ircd::lex_cast(nanoseconds i,
|
|
const mutable_buffer &buf)
|
|
{
|
|
static const size_t MAX(64);
|
|
return _lex_cast<MAX>(i.count(), buf);
|
|
}
|
|
|
|
template<> ircd::string_view
|
|
ircd::lex_cast(microseconds i,
|
|
const mutable_buffer &buf)
|
|
{
|
|
static const size_t MAX(64);
|
|
return _lex_cast<MAX>(i.count(), buf);
|
|
}
|
|
|
|
template<> ircd::string_view
|
|
ircd::lex_cast(milliseconds i,
|
|
const mutable_buffer &buf)
|
|
{
|
|
static const size_t MAX(64);
|
|
return _lex_cast<MAX>(i.count(), buf);
|
|
}
|
|
|
|
template<> ircd::string_view
|
|
ircd::lex_cast(seconds i,
|
|
const mutable_buffer &buf)
|
|
{
|
|
static const size_t MAX(64);
|
|
return _lex_cast<MAX>(i.count(), buf);
|
|
}
|
|
|
|
template<> bool
|
|
ircd::lex_cast(const string_view &s)
|
|
{
|
|
return s == "true"? true:
|
|
s == "false"? false:
|
|
_lex_cast<bool>(s);
|
|
}
|
|
|
|
template<> int8_t
|
|
ircd::lex_cast(const string_view &s)
|
|
{
|
|
return _lex_cast<char>(s);
|
|
}
|
|
|
|
template<> uint8_t
|
|
ircd::lex_cast(const string_view &s)
|
|
{
|
|
return _lex_cast<unsigned char>(s);
|
|
}
|
|
|
|
template<> short
|
|
ircd::lex_cast(const string_view &s)
|
|
{
|
|
return _lex_cast<short>(s);
|
|
}
|
|
|
|
template<> unsigned short
|
|
ircd::lex_cast(const string_view &s)
|
|
{
|
|
return _lex_cast<unsigned short>(s);
|
|
}
|
|
|
|
template<> int
|
|
ircd::lex_cast(const string_view &s)
|
|
{
|
|
return _lex_cast<int>(s);
|
|
}
|
|
|
|
template<> unsigned int
|
|
ircd::lex_cast(const string_view &s)
|
|
{
|
|
return _lex_cast<unsigned int>(s);
|
|
}
|
|
|
|
template<> long
|
|
ircd::lex_cast(const string_view &s)
|
|
{
|
|
return _lex_cast<long>(s);
|
|
}
|
|
|
|
template<> unsigned long
|
|
ircd::lex_cast(const string_view &s)
|
|
{
|
|
return _lex_cast<unsigned long>(s);
|
|
}
|
|
|
|
template<> double
|
|
ircd::lex_cast(const string_view &s)
|
|
{
|
|
return _lex_cast<double>(s);
|
|
}
|
|
|
|
template<> long double
|
|
ircd::lex_cast(const string_view &s)
|
|
{
|
|
return _lex_cast<long double>(s);
|
|
}
|
|
|
|
template<> ircd::nanoseconds
|
|
ircd::lex_cast(const string_view &s)
|
|
{
|
|
return std::chrono::duration<time_t, std::ratio<1L, 1000000000L>>(_lex_cast<time_t>(s));
|
|
}
|
|
|
|
template<> ircd::microseconds
|
|
ircd::lex_cast(const string_view &s)
|
|
{
|
|
return std::chrono::duration<time_t, std::ratio<1L, 1000000L>>(_lex_cast<time_t>(s));
|
|
}
|
|
|
|
template<> ircd::milliseconds
|
|
ircd::lex_cast(const string_view &s)
|
|
{
|
|
return std::chrono::duration<time_t, std::ratio<1L, 1000L>>(_lex_cast<time_t>(s));
|
|
}
|
|
|
|
template<> ircd::seconds
|
|
ircd::lex_cast(const string_view &s)
|
|
{
|
|
return std::chrono::duration<time_t, std::ratio<1L, 1L>>(_lex_cast<time_t>(s));
|
|
}
|
|
|
|
template<> bool
|
|
ircd::try_lex_cast<bool>(const string_view &s)
|
|
{
|
|
bool i;
|
|
return boost::conversion::try_lexical_convert(s, i);
|
|
}
|
|
|
|
template<> bool
|
|
ircd::try_lex_cast<int8_t>(const string_view &s)
|
|
{
|
|
int8_t i;
|
|
return boost::conversion::try_lexical_convert(s, i);
|
|
}
|
|
|
|
template<> bool
|
|
ircd::try_lex_cast<uint8_t>(const string_view &s)
|
|
{
|
|
uint8_t i;
|
|
return boost::conversion::try_lexical_convert(s, i);
|
|
}
|
|
|
|
template<> bool
|
|
ircd::try_lex_cast<short>(const string_view &s)
|
|
{
|
|
short i;
|
|
return boost::conversion::try_lexical_convert(s, i);
|
|
}
|
|
|
|
template<> bool
|
|
ircd::try_lex_cast<ushort>(const string_view &s)
|
|
{
|
|
ushort i;
|
|
return boost::conversion::try_lexical_convert(s, i);
|
|
}
|
|
|
|
template<> bool
|
|
ircd::try_lex_cast<int>(const string_view &s)
|
|
{
|
|
int i;
|
|
return boost::conversion::try_lexical_convert(s, i);
|
|
}
|
|
|
|
template<> bool
|
|
ircd::try_lex_cast<unsigned int>(const string_view &s)
|
|
{
|
|
unsigned int i;
|
|
return boost::conversion::try_lexical_convert(s, i);
|
|
}
|
|
|
|
template<> bool
|
|
ircd::try_lex_cast<long>(const string_view &s)
|
|
{
|
|
long i;
|
|
return boost::conversion::try_lexical_convert(s, i);
|
|
}
|
|
|
|
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
|
|
};
|
|
|
|
std::string ret(size, char{});
|
|
auto *p{const_cast<char *>(ret.data())};
|
|
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;
|
|
});
|
|
|
|
//assert(ret.size() == size_t(std::distance(ret.data(), const_cast<const char *>(p))));
|
|
ret.resize(std::distance(ret.data(), const_cast<const char *>(p)));
|
|
return ret;
|
|
}
|
|
|
|
namespace ircd
|
|
{
|
|
const char _b64_pad_
|
|
{
|
|
'='
|
|
};
|
|
|
|
using _b64_encoder = std::function<string_view (const mutable_buffer &, const const_raw_buffer &)>;
|
|
static std::string _b64encode(const const_raw_buffer &in, const _b64_encoder &);
|
|
}
|
|
|
|
/// Allocate and return a string without padding from the encoding of in
|
|
std::string
|
|
ircd::b64encode_unpadded(const const_raw_buffer &in)
|
|
{
|
|
return _b64encode(in, [](const auto &out, const auto &in)
|
|
{
|
|
return b64encode_unpadded(out, in);
|
|
});
|
|
}
|
|
|
|
/// Allocate and return a string from the encoding of in
|
|
std::string
|
|
ircd::b64encode(const const_raw_buffer &in)
|
|
{
|
|
return _b64encode(in, [](const auto &out, const auto &in)
|
|
{
|
|
return b64encode(out, in);
|
|
});
|
|
}
|
|
|
|
/// Internal; dedupes encoding functions that create and return a string
|
|
static std::string
|
|
ircd::_b64encode(const const_raw_buffer &in,
|
|
const _b64_encoder &encoder)
|
|
{
|
|
// Allocate a buffer 1.33 times larger than input with pessimistic
|
|
// extra space for any padding and nulling.
|
|
const auto max
|
|
{
|
|
ceil(size(in) * (4.0 / 3.0)) + 4
|
|
};
|
|
|
|
std::string ret(max, char{});
|
|
const mutable_buffer buf
|
|
{
|
|
const_cast<char *>(ret.data()), ret.size()
|
|
};
|
|
|
|
const string_view encoded
|
|
{
|
|
encoder(buf, in)
|
|
};
|
|
|
|
assert(size(encoded) <= ret.size());
|
|
ret.resize(size(encoded));
|
|
return ret;
|
|
}
|
|
|
|
/// Encoding in to base64 at out. Out must be 1.33+ larger than in
|
|
/// padding is not present in the returned view.
|
|
ircd::string_view
|
|
ircd::b64encode(const mutable_buffer &out,
|
|
const const_raw_buffer &in)
|
|
{
|
|
const auto pads
|
|
{
|
|
(3 - size(in) % 3) % 3
|
|
};
|
|
|
|
const auto encoded
|
|
{
|
|
b64encode_unpadded(out, in)
|
|
};
|
|
|
|
assert(size(encoded) + pads <= size(out));
|
|
memset(data(out) + size(encoded), _b64_pad_, pads);
|
|
|
|
const auto len
|
|
{
|
|
size(encoded) + pads
|
|
};
|
|
|
|
return { data(out), len };
|
|
}
|
|
|
|
/// Encoding in to base64 at out. Out must be 1.33+ larger than in.
|
|
ircd::string_view
|
|
ircd::b64encode_unpadded(const mutable_buffer &out,
|
|
const const_raw_buffer &in)
|
|
{
|
|
namespace iterators = boost::archive::iterators;
|
|
using transform = iterators::transform_width<unsigned char *, 6, 8>;
|
|
using b64fb = iterators::base64_from_binary<transform>;
|
|
|
|
const auto cpsz
|
|
{
|
|
std::min(size(in), size_t(size(out) * (3.0 / 4.0)))
|
|
};
|
|
|
|
const auto end
|
|
{
|
|
std::copy(b64fb(data(in)), b64fb(data(in) + cpsz), begin(out))
|
|
};
|
|
|
|
const auto len
|
|
{
|
|
size_t(std::distance(begin(out), end))
|
|
};
|
|
|
|
assert(len <= size(out));
|
|
return { data(out), len };
|
|
}
|
|
|
|
std::string
|
|
ircd::b64decode(const string_view &in)
|
|
{
|
|
// Allocate a buffer 75% than input with pessimistic extra space
|
|
const auto max
|
|
{
|
|
ceil(size(in) * 0.75) + 4
|
|
};
|
|
|
|
std::string ret(max, char{});
|
|
const mutable_raw_buffer buf
|
|
{
|
|
reinterpret_cast<unsigned char *>(const_cast<char *>(ret.data())), ret.size()
|
|
};
|
|
|
|
const auto decoded
|
|
{
|
|
b64decode(buf, in)
|
|
};
|
|
|
|
assert(size(decoded) <= ret.size());
|
|
ret.resize(size(decoded));
|
|
return ret;
|
|
}
|
|
|
|
/// Decode base64 from in to the buffer at out; out can be 75% of the size
|
|
/// of in.
|
|
ircd::const_raw_buffer
|
|
ircd::b64decode(const mutable_raw_buffer &out,
|
|
const string_view &in)
|
|
{
|
|
namespace iterators = boost::archive::iterators;
|
|
using b64bf = iterators::binary_from_base64<const char *>;
|
|
using transform = iterators::transform_width<b64bf, 8, 6>;
|
|
|
|
const auto pads
|
|
{
|
|
endswith_count(in, _b64_pad_)
|
|
};
|
|
|
|
const auto e
|
|
{
|
|
std::copy(transform(begin(in)), transform(begin(in) + size(in) - pads), begin(out))
|
|
};
|
|
|
|
const auto len
|
|
{
|
|
std::distance(begin(out), e)
|
|
};
|
|
|
|
assert(size_t(len) <= size(out));
|
|
return { data(out), size_t(len) };
|
|
}
|
|
|
|
ircd::const_raw_buffer
|
|
ircd::a2u(const mutable_raw_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 };
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::u2a(const mutable_buffer &out,
|
|
const const_raw_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)) };
|
|
}
|
|
|
|
/*
|
|
* strip_colour - remove colour codes from a string
|
|
* -asuffield (?)
|
|
*/
|
|
char *
|
|
ircd::strip_colour(char *string)
|
|
{
|
|
char *c = string;
|
|
char *c2 = string;
|
|
char *last_non_space = NULL;
|
|
|
|
/* c is source, c2 is target */
|
|
for(; c && *c; c++)
|
|
switch (*c)
|
|
{
|
|
case 3:
|
|
if(rfc1459::is_digit(c[1]))
|
|
{
|
|
c++;
|
|
if(rfc1459::is_digit(c[1]))
|
|
c++;
|
|
if(c[1] == ',' && rfc1459::is_digit(c[2]))
|
|
{
|
|
c += 2;
|
|
if(rfc1459::is_digit(c[1]))
|
|
c++;
|
|
}
|
|
}
|
|
break;
|
|
case 2:
|
|
case 4:
|
|
case 6:
|
|
case 7:
|
|
case 15:
|
|
case 22:
|
|
case 23:
|
|
case 27:
|
|
case 29:
|
|
case 31:
|
|
break;
|
|
case 32:
|
|
*c2++ = *c;
|
|
break;
|
|
default:
|
|
*c2++ = *c;
|
|
last_non_space = c2;
|
|
break;
|
|
}
|
|
|
|
*c2 = '\0';
|
|
|
|
if(last_non_space)
|
|
*last_non_space = '\0';
|
|
|
|
return string;
|
|
}
|
|
|
|
char *
|
|
ircd::strip_unprintable(char *string)
|
|
{
|
|
char *c = string;
|
|
char *c2 = string;
|
|
char *last_non_space = NULL;
|
|
|
|
/* c is source, c2 is target */
|
|
for(; c && *c; c++)
|
|
switch (*c)
|
|
{
|
|
case 3:
|
|
if(rfc1459::is_digit(c[1]))
|
|
{
|
|
c++;
|
|
if(rfc1459::is_digit(c[1]))
|
|
c++;
|
|
if(c[1] == ',' && rfc1459::is_digit(c[2]))
|
|
{
|
|
c += 2;
|
|
if(rfc1459::is_digit(c[1]))
|
|
c++;
|
|
}
|
|
}
|
|
break;
|
|
case 32:
|
|
*c2++ = *c;
|
|
break;
|
|
default:
|
|
if (*c < 32)
|
|
break;
|
|
*c2++ = *c;
|
|
last_non_space = c2;
|
|
break;
|
|
}
|
|
|
|
*c2 = '\0';
|
|
|
|
if(last_non_space)
|
|
*last_non_space = '\0';
|
|
|
|
return string;
|
|
}
|
|
|
|
// This is from the old parse.c and does not ensure the trailing :is added
|
|
// NOTE: Deprecated. Use formal grammar.
|
|
char *
|
|
ircd::reconstruct_parv(int parc, const char *parv[])
|
|
{
|
|
static char tmpbuf[BUFSIZE];
|
|
|
|
strlcpy(tmpbuf, parv[0], BUFSIZE);
|
|
for (int i = 1; i < parc; i++)
|
|
{
|
|
strlcat(tmpbuf, " ", BUFSIZE);
|
|
strlcat(tmpbuf, parv[i], BUFSIZE);
|
|
}
|
|
|
|
return tmpbuf;
|
|
}
|