stellar

Extract random number generation

6 files changed, 50 insertions(+), 28 deletions(-)

diff --git a/ CMakeLists.txt b/ CMakeLists.txt

@@ -3,7 +3,7 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON) project( Stellar

VERSION 0.0.15

VERSION 0.0.16

DESCRIPTION "Chess engine written in C" HOMEPAGE_URL https://git.dimitrijedobrota.com/stellar.git LANGUAGES C

diff --git a/ src/attacks/CMakeLists.txt b/ src/attacks/CMakeLists.txt

@@ -26,6 +26,7 @@ add_executable(magic target_link_libraries(magic PRIVATE utils

PRIVATE random

) set_target_properties(magic PROPERTIES

diff --git a/ src/attacks/magic_generate.c b/ src/attacks/magic_generate.c

@@ -1,4 +1,5 @@ #include "internal.h"

#include "random.h"

#include <inttypes.h> #include <stdio.h>

@@ -8,34 +9,9 @@ const char *FORMAT = "C64(0x%llx),\n";

// pseudo random numbers

U32 state = C32(1804289383);

U32 get_random_U32_number() {

U32 number = state;

number ^= number << 13;

number ^= number >> 17;

number ^= number << 5;

return state = number;

}

U64 get_random_U64_number() {

U64 n1, n2, n3, n4;

n1 = (U64)(get_random_U32_number()) & C64(0xFFFF);

n2 = (U64)(get_random_U32_number()) & C64(0xFFFF);

n3 = (U64)(get_random_U32_number()) & C64(0xFFFF);

n4 = (U64)(get_random_U32_number()) & C64(0xFFFF);

return n1 | (n2 << 16) | (n3 << 32) | (n4 << 48);

}

U64 generate_magic_number() {

return get_random_U64_number() & get_random_U64_number() &

get_random_U64_number();

return random_get_U64() & random_get_U64() &

random_get_U64();

} U64 find_magic_number(Square square, int relevant_bits, int bishop) {

@@ -76,6 +52,7 @@ U64 find_magic_number(Square square, int relevant_bits, int bishop) { } int main(void) {

random_state_reset();

printf("Bishup Magic Numbers:\n"); for (int i = 0; i < 64; i++)

diff --git a/ src/include/random.h b/ src/include/random.h

@@ -0,0 +1,10 @@

#ifndef STELLAR_RANDOM_H

#define STELLAR_RANDOM_H

#include "utils.h"

void random_state_reset();

U32 random_get_U32();

U64 random_get_U64();

#endif

diff --git a/ src/utils/CMakeLists.txt b/ src/utils/CMakeLists.txt

@@ -5,3 +5,11 @@ add_library(utils OBJECT target_include_directories(utils PUBLIC "${PROJECT_SOURCE_DIR}/src/include" )

add_library(random OBJECT

random.c

)

target_include_directories(random

PUBLIC "${PROJECT_SOURCE_DIR}/src/include"

)

diff --git a/ src/utils/random.c b/ src/utils/random.c

@@ -0,0 +1,26 @@

#include "random.h"

U32 state = C32(1804289383);

void random_state_reset() { state = C32(1804289383); }

U32 random_get_U32() {

U32 number = state;

number ^= number << 13;

number ^= number >> 17;

number ^= number << 5;

return state = number;

}

U64 random_get_U64() {

U64 n1, n2, n3, n4;

n1 = (U64)(random_get_U32()) & C64(0xFFFF);

n2 = (U64)(random_get_U32()) & C64(0xFFFF);

n3 = (U64)(random_get_U32()) & C64(0xFFFF);

n4 = (U64)(random_get_U32()) & C64(0xFFFF);

return n1 | (n2 << 16) | (n3 << 32) | (n4 << 48);

}