cdef20bb66
adjust clang-format options to get closer to ISC style See merge request isc-projects/bind9!3061 (cherry picked from commitd3b49b6675)0255a974revise .clang-format and add a C formatting script in utile851ed0bapply the modified style
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/*
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* Portions Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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/*
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* Written in 2018 by David Blackman and Sebastiano Vigna (vigna@acm.org)
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*
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* To the extent possible under law, the author has dedicated all
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* copyright and related and neighboring rights to this software to the
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* public domain worldwide. This software is distributed without any
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* warranty.
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*
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* See <http://creativecommons.org/publicdomain/zero/1.0/>.
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*/
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#include <inttypes.h>
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#include <isc/thread.h>
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/*
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* This is xoshiro128** 1.0, our 32-bit all-purpose, rock-solid generator.
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* It has excellent (sub-ns) speed, a state size (128 bits) that is large
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* enough for mild parallelism, and it passes all tests we are aware of.
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*
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* For generating just single-precision (i.e., 32-bit) floating-point
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* numbers, xoshiro128+ is even faster.
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*
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* The state must be seeded so that it is not everywhere zero.
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*/
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ISC_THREAD_LOCAL uint32_t seed[4] = { 0 };
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static inline uint32_t
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rotl(const uint32_t x, int k) {
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return ((x << k) | (x >> (32 - k)));
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}
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static inline uint32_t
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next(void) {
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uint32_t result_starstar, t;
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result_starstar = rotl(seed[0] * 5, 7) * 9;
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t = seed[1] << 9;
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seed[2] ^= seed[0];
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seed[3] ^= seed[1];
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seed[1] ^= seed[2];
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seed[0] ^= seed[3];
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seed[2] ^= t;
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seed[3] = rotl(seed[3], 11);
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return (result_starstar);
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}
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