Differential D19042 Diff 56875 src/random.h

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src/random.h

Show First 20 Lines • Show All 224 Lines • ▼ Show 20 Lines	uint64_t randrange(uint64_t range) noexcept {
uint64_t ret = randbits(bits);		uint64_t ret = randbits(bits);
if (ret <= range) {		if (ret <= range) {
return ret;		return ret;
}		}
}		}
}		}

/** Generate random bytes. */		/** Generate random bytes. */
template <typename B = uint8_t> std::vector<B> randbytes(size_t len);		template <typename B = uint8_t> std::vector<B> randbytes(size_t len) {
		std::vector<B> ret(len);
		fillrand(MakeWritableByteSpan(ret));
		return ret;
		}

/** Fill a byte Span with random bytes. */		/** Fill a byte Span with random bytes. */
void fillrand(Span<std::byte> output);		void fillrand(Span<std::byte> output);

/** Generate a random 32-bit integer. */		/** Generate a random 32-bit integer. */
uint32_t rand32() noexcept { return randbits(32); }		uint32_t rand32() noexcept { return randbits(32); }

/** generate a random uint160. */		/** generate a random uint160. */
uint160 rand160() noexcept;		uint160 rand160() noexcept {
		uint160 ret;
		fillrand(MakeWritableByteSpan(ret));
		return ret;
		}

/** generate a random uint256. */		/** generate a random uint256. */
uint256 rand256() noexcept;		uint256 rand256() noexcept {
		uint256 ret;
		fillrand(MakeWritableByteSpan(ret));
		return ret;
		}

/** Generate a random boolean. */		/** Generate a random boolean. */
bool randbool() noexcept { return randbits(1); }		bool randbool() noexcept { return randbits(1); }

/** Return the time point advanced by a uniform random duration. */		/** Return the time point advanced by a uniform random duration. */
template <typename Tp>		template <typename Tp>
Tp rand_uniform_delay(const Tp &time, typename Tp::duration range) {		Tp rand_uniform_delay(const Tp &time, typename Tp::duration range) {
using Dur = typename Tp::duration;		using Dur = typename Tp::duration;
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