35 lines
1.0 KiB
C++
35 lines
1.0 KiB
C++
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// Copyright Catch2 Authors
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// https://www.boost.org/LICENSE_1_0.txt)
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// SPDX-License-Identifier: BSL-1.0
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#include <catch2/internal/catch_random_seed_generation.hpp>
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#include <catch2/internal/catch_enforce.hpp>
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#include <ctime>
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#include <random>
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namespace Catch {
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std::uint32_t generateRandomSeed( GenerateFrom from ) {
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switch ( from ) {
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case GenerateFrom::Time:
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return static_cast<std::uint32_t>( std::time( nullptr ) );
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case GenerateFrom::Default:
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case GenerateFrom::RandomDevice:
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// In theory, a platform could have random_device that returns just
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// 16 bits. That is still some randomness, so we don't care too much
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return static_cast<std::uint32_t>( std::random_device{}() );
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default:
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CATCH_ERROR("Unknown generation method");
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}
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}
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} // end namespace Catch
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