mirror of
https://github.com/matrix-construct/construct
synced 2024-05-29 00:03:45 +02:00
75 lines
1.6 KiB
C++
75 lines
1.6 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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decltype(ircd::rand::device) ircd::rand::device
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{
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// on linux: uses RDRND or /dev/urandom
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// on windows: TODO: verify construction source
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};
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decltype(ircd::rand::mt) ircd::rand::mt
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{
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device()
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};
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decltype(ircd::rand::dict::alnum) ircd::rand::dict::alnum
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{
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"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
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};
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decltype(ircd::rand::dict::alpha) ircd::rand::dict::alpha
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{
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
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};
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decltype(ircd::rand::dict::upper) ircd::rand::dict::upper
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{
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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};
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decltype(ircd::rand::dict::lower) ircd::rand::dict::lower
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{
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"abcdefghijklmnopqrstuvwxyz"
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};
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decltype(ircd::rand::dict::numeric) ircd::rand::dict::numeric
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{
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"0123456789"
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};
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std::string
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ircd::rand::string(const std::string &dict,
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const size_t &len)
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{
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return ircd::util::string(len, [&dict]
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(const mutable_buffer &buf)
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{
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return string(dict, buf);
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});
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}
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ircd::string_view
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ircd::rand::string(const std::string &dict,
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const mutable_buffer &out)
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{
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std::uniform_int_distribution<size_t> dist
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{
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0, dict.size() - 1
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};
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std::generate(data(out), data(out) + size(out), [&dict, &dist]
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() -> char
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{
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return dict.at(dist(mt));
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});
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return out;
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}
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