mirror of
https://github.com/matrix-construct/construct
synced 2024-11-27 09:12:36 +01:00
74 lines
1.6 KiB
C++
74 lines
1.6 KiB
C++
// Matrix Construct
|
|
//
|
|
// Copyright (C) Matrix Construct Developers, Authors & Contributors
|
|
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
|
|
//
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
|
// purpose with or without fee is hereby granted, provided that the above
|
|
// copyright notice and this permission notice is present in all copies. The
|
|
// full license for this software is available in the LICENSE file.
|
|
|
|
decltype(ircd::rand::device) ircd::rand::device
|
|
{
|
|
// on linux: uses RDRND or /dev/urandom
|
|
// on windows: TODO: verify construction source
|
|
};
|
|
|
|
decltype(ircd::rand::mt) ircd::rand::mt
|
|
{
|
|
device()
|
|
};
|
|
|
|
decltype(ircd::rand::dict::alnum) ircd::rand::dict::alnum
|
|
{
|
|
"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
|
|
};
|
|
|
|
decltype(ircd::rand::dict::alpha) ircd::rand::dict::alpha
|
|
{
|
|
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
|
|
};
|
|
|
|
decltype(ircd::rand::dict::upper) ircd::rand::dict::upper
|
|
{
|
|
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
|
};
|
|
|
|
decltype(ircd::rand::dict::lower) ircd::rand::dict::lower
|
|
{
|
|
"abcdefghijklmnopqrstuvwxyz"
|
|
};
|
|
|
|
decltype(ircd::rand::dict::numeric) ircd::rand::dict::numeric
|
|
{
|
|
"0123456789"
|
|
};
|
|
|
|
std::string
|
|
ircd::rand::string(const std::string &dict,
|
|
const size_t &len)
|
|
{
|
|
return ircd::util::string(len, [&dict]
|
|
(const mutable_buffer &buf)
|
|
{
|
|
return string(dict, buf);
|
|
});
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::rand::string(const std::string &dict,
|
|
const mutable_buffer &out)
|
|
{
|
|
std::uniform_int_distribution<size_t> dist
|
|
{
|
|
0, dict.size() - 1
|
|
};
|
|
|
|
std::generate(data(out), data(out) + size(out), [&dict, &dist]
|
|
() -> char
|
|
{
|
|
return dict.at(dist(mt));
|
|
});
|
|
|
|
return out;
|
|
}
|