From 6fad44af4ae20b424ff1caddc8b38957897d400a Mon Sep 17 00:00:00 2001 From: Raymaekers Luca Date: Thu, 13 Nov 2025 12:37:21 +0100 Subject: checkpoint --- src/haversine/libs/pcg/pcg-advance-32.c | 62 --------------------------------- 1 file changed, 62 deletions(-) delete mode 100644 src/haversine/libs/pcg/pcg-advance-32.c (limited to 'src/haversine/libs/pcg/pcg-advance-32.c') diff --git a/src/haversine/libs/pcg/pcg-advance-32.c b/src/haversine/libs/pcg/pcg-advance-32.c deleted file mode 100644 index 76f35fc..0000000 --- a/src/haversine/libs/pcg/pcg-advance-32.c +++ /dev/null @@ -1,62 +0,0 @@ -/* - * PCG Random Number Generation for C. - * - * Copyright 2014 Melissa O'Neill - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - * For additional information about the PCG random number generation scheme, - * including its license and other licensing options, visit - * - * http://www.pcg-random.org - */ - -/* - * This code is derived from the canonical C++ PCG implementation, which - * has many additional features and is preferable if you can use C++ in - * your project. - * - * Repetative C code is derived using C preprocessor metaprogramming - * techniques. - */ - -#include "pcg_variants.h" - -/* Multi-step advance functions (jump-ahead, jump-back) - * - * The method used here is based on Brown, "Random Number Generation - * with Arbitrary Stride,", Transactions of the American Nuclear - * Society (Nov. 1994). The algorithm is very similar to fast - * exponentiation. - * - * Even though delta is an unsigned integer, we can pass a - * signed integer to go backwards, it just goes "the long way round". - */ - -uint32_t pcg_advance_lcg_32(uint32_t state, uint32_t delta, uint32_t cur_mult, - uint32_t cur_plus) -{ - uint32_t acc_mult = 1u; - uint32_t acc_plus = 0u; - while (delta > 0) { - if (delta & 1) { - acc_mult *= cur_mult; - acc_plus = acc_plus * cur_mult + cur_plus; - } - cur_plus = (cur_mult + 1) * cur_plus; - cur_mult *= cur_mult; - delta /= 2; - } - return acc_mult * state + acc_plus; -} - -- cgit v1.2.3-70-g09d2