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57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2019 Telegram Systems LLP
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*/
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#pragma once
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#include <string>
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#include <cassert>
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namespace prng {
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// use this generator unless need a separate one
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class RandomGen;
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RandomGen &rand_gen();
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class RandomGen {
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public:
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struct rand_error {};
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void randomize(bool force = true);
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void seed_add(const void *data, std::size_t size, double entropy = 0);
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bool ok() const;
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RandomGen() {
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randomize(false);
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}
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RandomGen(const void *seed, std::size_t size) {
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seed_add(seed, size);
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randomize(false);
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}
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bool rand_bytes(void *data, std::size_t size, bool strong = false);
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bool strong_rand_bytes(void *data, std::size_t size) {
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return rand_bytes(data, size, true);
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}
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template <class T>
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bool rand_obj(T &obj) {
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return rand_bytes(&obj, sizeof(T));
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}
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template <class T>
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bool rand_objs(T *ptr, std::size_t count) {
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return rand_bytes(ptr, sizeof(T) * count);
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}
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std::string rand_string(std::size_t size, bool strong = false);
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};
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} // namespace prng
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