diff options
Diffstat (limited to 'src/random.h')
| -rw-r--r-- | src/random.h | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/src/random.h b/src/random.h index 46e3ecc34c..690125079b 100644 --- a/src/random.h +++ b/src/random.h @@ -1,5 +1,5 @@ // Copyright (c) 2009-2010 Satoshi Nakamoto -// Copyright (c) 2009-2019 The Bitcoin Core developers +// Copyright (c) 2009-2020 The Bitcoin Core developers // Distributed under the MIT software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. @@ -104,7 +104,8 @@ void RandAddEvent(const uint32_t event_info) noexcept; * * This class is not thread-safe. */ -class FastRandomContext { +class FastRandomContext +{ private: bool requires_seed; ChaCha20 rng; @@ -156,7 +157,8 @@ public: } /** Generate a random (bits)-bit integer. */ - uint64_t randbits(int bits) noexcept { + uint64_t randbits(int bits) noexcept + { if (bits == 0) { return 0; } else if (bits > 32) { @@ -170,7 +172,9 @@ public: } } - /** Generate a random integer in the range [0..range). */ + /** Generate a random integer in the range [0..range). + * Precondition: range > 0. + */ uint64_t randrange(uint64_t range) noexcept { assert(range); @@ -211,7 +215,7 @@ public: * debug mode detects and panics on. This is a known issue, see * https://stackoverflow.com/questions/22915325/avoiding-self-assignment-in-stdshuffle */ -template<typename I, typename R> +template <typename I, typename R> void Shuffle(I first, I last, R&& rng) { while (first != last) { @@ -234,7 +238,7 @@ static const int NUM_OS_RANDOM_BYTES = 32; /** Get 32 bytes of system entropy. Do not use this in application code: use * GetStrongRandBytes instead. */ -void GetOSRand(unsigned char *ent32); +void GetOSRand(unsigned char* ent32); /** Check that OS randomness is available and returning the requested number * of bytes. |