From 4d2a86c7b7bf79cffd5469668bd580e14784d184 Mon Sep 17 00:00:00 2001
From: MrGeorgen <moinl6162@gmail.com>
Date: Wed, 18 Sep 2024 22:39:16 +0200
Subject: [PATCH] generate zobrist masks

---
 include/chess/rand.h       |  3 +++
 src/common/rand.c          | 10 ++++++++++
 src/findMagicNumber.c      |  8 +-------
 src/generateCode/zobrist.c | 30 ++++++++++++++++++++++++++++++
 4 files changed, 44 insertions(+), 7 deletions(-)
 create mode 100644 include/chess/rand.h
 create mode 100644 src/common/rand.c
 create mode 100644 src/generateCode/zobrist.c

diff --git a/include/chess/rand.h b/include/chess/rand.h
new file mode 100644
index 0000000..c786646
--- /dev/null
+++ b/include/chess/rand.h
@@ -0,0 +1,3 @@
+#include <stdint.h>
+
+uint_least64_t rand_64();
diff --git a/src/common/rand.c b/src/common/rand.c
new file mode 100644
index 0000000..6f30c43
--- /dev/null
+++ b/src/common/rand.c
@@ -0,0 +1,10 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <chess/rand.h>
+
+uint_least64_t rand_64() {
+	uint_least64_t u1, u2, u3, u4;
+  u1 = (uint_least64_t)(rand()) & 0xFFFF; u2 = (uint_least64_t)(rand()) & 0xFFFF;
+  u3 = (uint_least64_t)(rand()) & 0xFFFF; u4 = (uint_least64_t)(rand()) & 0xFFFF;
+  return u1 | (u2 << 16) | (u3 << 32) | (u4 << 48);
+}
diff --git a/src/findMagicNumber.c b/src/findMagicNumber.c
index 5fe9bf5..7cda657 100644
--- a/src/findMagicNumber.c
+++ b/src/findMagicNumber.c
@@ -9,18 +9,12 @@
 #include <chess/magic.h>
 #include <chess/generated/moveConsts.h>
 #include <chess/bitboard.h>
+#include <chess/rand.h>
 
 #define MAX_BITS 12
 #define MAX_SIZE (1 << MAX_BITS)
 #define ATTACK_TABLE_LENGTH (2 * MAX_SIZE * TOTAL_BOARD_SIZE)
 
-static uint_least64_t rand_64() {
-	uint_least64_t u1, u2, u3, u4;
-  u1 = (uint_least64_t)(rand()) & 0xFFFF; u2 = (uint_least64_t)(rand()) & 0xFFFF;
-  u3 = (uint_least64_t)(rand()) & 0xFFFF; u4 = (uint_least64_t)(rand()) & 0xFFFF;
-  return u1 | (u2 << 16) | (u3 << 32) | (u4 << 48);
-}
-
 static uint_least64_t randFewBits() {
 	return rand_64() & rand_64() & rand_64();
 }
diff --git a/src/generateCode/zobrist.c b/src/generateCode/zobrist.c
new file mode 100644
index 0000000..a7ac819
--- /dev/null
+++ b/src/generateCode/zobrist.c
@@ -0,0 +1,30 @@
+#include "chess/types.h"
+#include <stdint.h>
+#include <stdio.h>
+#include <chess/rand.h>
+#include <stdlib.h>
+#include <chess/print.h>
+#include <inttypes.h>
+
+static uint_least64_t zobristPieceI(struct piece_t piece, uint_least8_t field) {
+	return field * 2 * PIECES_LENGTH + piece.color * PIECES_LENGTH + piece.type;
+}
+
+int main() {
+	uint_least64_t zobristPiece[TOTAL_BOARD_SIZE * 2 * PIECES_LENGTH];
+	srand(0xc0229b8e);
+	printf("#ifndef CHESS_GENERATED_ZOBRIST_H\n"
+			"#define CHESS_GENERATED_ZOBRIST_H\n"
+			"#include <stdint.h>\n"
+			);
+	for(uint_least8_t color = BLACK; color <= WHITE; ++color) {
+		for(uint_least8_t pieceType = KING; pieceType < PIECES_LENGTH; ++pieceType) {
+			const struct piece_t piece = {pieceType, color};
+			for(uint_least8_t field = 0; field < TOTAL_BOARD_SIZE; ++field) {
+				zobristPiece[zobristPieceI(piece, field)] = rand_64();
+			}
+		}
+	}
+	defineArray("#define defineZobristPiece const static uint_least64_t ZOBRIST_PIECE", printerull, zobristPiece);
+	printf("#define defineZobristBlackMove const uint_least64_t ZOBRIST_BLACK_MOVE = %" PRIuLEAST64 "\n", rand_64());
+}