-
Notifications
You must be signed in to change notification settings - Fork 481
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
This reverts commit 86854a1.
- Loading branch information
Showing
1 changed file
with
142 additions
and
145 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,145 +1,142 @@ | ||
| /* | ||
| * This file is part of the BSGS distribution (https://github.com/JeanLucPons/BSGS). | ||
| * Copyright (c) 2020 Jean Luc PONS. | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, version 3. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, but | ||
| * WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| * General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
|
|
||
| #include "Random.h" | ||
|
|
||
| #if defined(_WIN64) && !defined(__CYGWIN__) | ||
| #else | ||
| #include <sys/random.h> | ||
| #endif | ||
|
|
||
| #ifdef __unix__ | ||
| #ifdef __CYGWIN__ | ||
| #else | ||
| #include <linux/random.h> | ||
| #endif | ||
| #endif | ||
|
|
||
| #define RK_STATE_LEN 624 | ||
|
|
||
| /* State of the RNG */ | ||
| typedef struct rk_state_ | ||
| { | ||
| unsigned long key[RK_STATE_LEN]; | ||
| int pos; | ||
| } rk_state; | ||
|
|
||
| rk_state localState; | ||
|
|
||
| /* Maximum generated random value */ | ||
| #define RK_MAX 0xFFFFFFFFUL | ||
|
|
||
| void rk_seed(unsigned long seed, rk_state *state) | ||
| { | ||
| int pos; | ||
| seed &= 0xffffffffUL; | ||
|
|
||
| /* Knuth's PRNG as used in the Mersenne Twister reference implementation */ | ||
| for (pos=0; pos<RK_STATE_LEN; pos++) | ||
| { | ||
| state->key[pos] = seed; | ||
| seed = (1812433253UL * (seed ^ (seed >> 30)) + pos + 1) & 0xffffffffUL; | ||
| } | ||
|
|
||
| state->pos = RK_STATE_LEN; | ||
| } | ||
|
|
||
| /* Magic Mersenne Twister constants */ | ||
| #define N 624 | ||
| #define M 397 | ||
| #define MATRIX_A 0x9908b0dfUL | ||
| #define UPPER_MASK 0x80000000UL | ||
| #define LOWER_MASK 0x7fffffffUL | ||
|
|
||
| #ifdef _WIN64 | ||
| // Disable "unary minus operator applied to unsigned type, result still unsigned" warning. | ||
| #pragma warning(disable : 4146) | ||
| #endif | ||
|
|
||
| /* Slightly optimised reference implementation of the Mersenne Twister */ | ||
| inline unsigned long rk_random(rk_state *state) | ||
| { | ||
| unsigned long y; | ||
|
|
||
| if (state->pos == RK_STATE_LEN) | ||
| { | ||
| int i; | ||
|
|
||
| for (i=0;i<N-M;i++) | ||
| { | ||
| y = (state->key[i] & UPPER_MASK) | (state->key[i+1] & LOWER_MASK); | ||
| state->key[i] = state->key[i+M] ^ (y>>1) ^ (-(y & 1) & MATRIX_A); | ||
| } | ||
| for (;i<N-1;i++) | ||
| { | ||
| y = (state->key[i] & UPPER_MASK) | (state->key[i+1] & LOWER_MASK); | ||
| state->key[i] = state->key[i+(M-N)] ^ (y>>1) ^ (-(y & 1) & MATRIX_A); | ||
| } | ||
| y = (state->key[N-1] & UPPER_MASK) | (state->key[0] & LOWER_MASK); | ||
| state->key[N-1] = state->key[M-1] ^ (y>>1) ^ (-(y & 1) & MATRIX_A); | ||
|
|
||
| state->pos = 0; | ||
| } | ||
|
|
||
| y = state->key[state->pos++]; | ||
|
|
||
| /* Tempering */ | ||
| y ^= (y >> 11); | ||
| y ^= (y << 7) & 0x9d2c5680UL; | ||
| y ^= (y << 15) & 0xefc60000UL; | ||
| y ^= (y >> 18); | ||
|
|
||
| return y; | ||
| } | ||
|
|
||
| inline double rk_double(rk_state *state) | ||
| { | ||
| /* shifts : 67108864 = 0x4000000, 9007199254740992 = 0x20000000000000 */ | ||
| long a = rk_random(state) >> 5, b = rk_random(state) >> 6; | ||
| return (a * 67108864.0 + b) / 9007199254740992.0; | ||
| } | ||
|
|
||
| // Initialise the random generator with the specified seed | ||
| void rseed(unsigned long seed) { | ||
| rk_seed(seed,&localState); | ||
| //srand(seed); | ||
| } | ||
|
|
||
| #if defined(_WIN64) && !defined(__CYGWIN__) | ||
| unsigned long rndl() { | ||
| return rk_random(&localState); | ||
| } | ||
| #else | ||
| unsigned long rndl() { | ||
| unsigned long r; | ||
| int bytes_read = getrandom(&r, sizeof(unsigned long), GRND_NONBLOCK ); | ||
| if (bytes_read > 0) { | ||
| return r; | ||
| } | ||
| else { | ||
| /*Fail safe */ | ||
| return rk_random(&localState); | ||
| } | ||
| } | ||
|
|
||
| #endif | ||
|
|
||
| // Returns a uniform distributed double value in the interval ]0,1[ | ||
| double rnd() { | ||
| return rk_double(&localState); | ||
| } | ||
| /* | ||
| * This file is part of the BSGS distribution (https://github.com/JeanLucPons/BSGS). | ||
| * Copyright (c) 2020 Jean Luc PONS. | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, version 3. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, but | ||
| * WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| * General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
||
|
|
||
| #include "Random.h" | ||
|
|
||
| #if defined(_WIN64) && !defined(__CYGWIN__) | ||
| #else | ||
| #include <sys/random.h> | ||
| #endif | ||
|
|
||
| #ifdef __unix__ | ||
| #include <linux/random.h> | ||
| #endif | ||
|
|
||
| #define RK_STATE_LEN 624 | ||
|
|
||
| /* State of the RNG */ | ||
| typedef struct rk_state_ | ||
| { | ||
| unsigned long key[RK_STATE_LEN]; | ||
| int pos; | ||
| } rk_state; | ||
|
|
||
| rk_state localState; | ||
|
|
||
| /* Maximum generated random value */ | ||
| #define RK_MAX 0xFFFFFFFFUL | ||
|
|
||
| void rk_seed(unsigned long seed, rk_state *state) | ||
| { | ||
| int pos; | ||
| seed &= 0xffffffffUL; | ||
|
|
||
| /* Knuth's PRNG as used in the Mersenne Twister reference implementation */ | ||
| for (pos=0; pos<RK_STATE_LEN; pos++) | ||
| { | ||
| state->key[pos] = seed; | ||
| seed = (1812433253UL * (seed ^ (seed >> 30)) + pos + 1) & 0xffffffffUL; | ||
| } | ||
|
|
||
| state->pos = RK_STATE_LEN; | ||
| } | ||
|
|
||
| /* Magic Mersenne Twister constants */ | ||
| #define N 624 | ||
| #define M 397 | ||
| #define MATRIX_A 0x9908b0dfUL | ||
| #define UPPER_MASK 0x80000000UL | ||
| #define LOWER_MASK 0x7fffffffUL | ||
|
|
||
| #ifdef _WIN64 | ||
| // Disable "unary minus operator applied to unsigned type, result still unsigned" warning. | ||
| #pragma warning(disable : 4146) | ||
| #endif | ||
|
|
||
| /* Slightly optimised reference implementation of the Mersenne Twister */ | ||
| inline unsigned long rk_random(rk_state *state) | ||
| { | ||
| unsigned long y; | ||
|
|
||
| if (state->pos == RK_STATE_LEN) | ||
| { | ||
| int i; | ||
|
|
||
| for (i=0;i<N-M;i++) | ||
| { | ||
| y = (state->key[i] & UPPER_MASK) | (state->key[i+1] & LOWER_MASK); | ||
| state->key[i] = state->key[i+M] ^ (y>>1) ^ (-(y & 1) & MATRIX_A); | ||
| } | ||
| for (;i<N-1;i++) | ||
| { | ||
| y = (state->key[i] & UPPER_MASK) | (state->key[i+1] & LOWER_MASK); | ||
| state->key[i] = state->key[i+(M-N)] ^ (y>>1) ^ (-(y & 1) & MATRIX_A); | ||
| } | ||
| y = (state->key[N-1] & UPPER_MASK) | (state->key[0] & LOWER_MASK); | ||
| state->key[N-1] = state->key[M-1] ^ (y>>1) ^ (-(y & 1) & MATRIX_A); | ||
|
|
||
| state->pos = 0; | ||
| } | ||
|
|
||
| y = state->key[state->pos++]; | ||
|
|
||
| /* Tempering */ | ||
| y ^= (y >> 11); | ||
| y ^= (y << 7) & 0x9d2c5680UL; | ||
| y ^= (y << 15) & 0xefc60000UL; | ||
| y ^= (y >> 18); | ||
|
|
||
| return y; | ||
| } | ||
|
|
||
| inline double rk_double(rk_state *state) | ||
| { | ||
| /* shifts : 67108864 = 0x4000000, 9007199254740992 = 0x20000000000000 */ | ||
| long a = rk_random(state) >> 5, b = rk_random(state) >> 6; | ||
| return (a * 67108864.0 + b) / 9007199254740992.0; | ||
| } | ||
|
|
||
| // Initialise the random generator with the specified seed | ||
| void rseed(unsigned long seed) { | ||
| rk_seed(seed,&localState); | ||
| //srand(seed); | ||
| } | ||
|
|
||
| #if defined(_WIN64) && !defined(__CYGWIN__) | ||
| unsigned long rndl() { | ||
| return rk_random(&localState); | ||
| } | ||
| #else | ||
| unsigned long rndl() { | ||
| unsigned long r; | ||
| int bytes_read = getrandom(&r, sizeof(unsigned long), GRND_NONBLOCK ); | ||
| if (bytes_read > 0) { | ||
| return r; | ||
| } | ||
| else { | ||
| /*Fail safe */ | ||
| return rk_random(&localState); | ||
| } | ||
| } | ||
|
|
||
| #endif | ||
|
|
||
| // Returns a uniform distributed double value in the interval ]0,1[ | ||
| double rnd() { | ||
| return rk_double(&localState); | ||
| } |