adding more memory efficnet helper functions

1 files changed, 34 insertions, 0 deletions

diff --git a/src/board/board.cpp b/src/board/board.cpp
index ad5ab12..9d0ef47 100644
--- a/src/board/board.cpp
+++ b/src/board/board.cpp
@@ -2,6 +2,7 @@
 #include <cstdint>
 #include <cstdlib>
 #include <cstring>
+#include <iostream>
 
 #include "board.hpp"
 #include "moves.hpp"
@@ -9,6 +10,39 @@
 
 int PositionToIndex(Position i) { return (i.rank * 8) + i.file; }
 
+PieceType getPromotionTypeFromMove(uint16_t move) {
+  bool firstFlag = (move & (1 << 1)) != 0;
+  bool secondFlag = (move & (1 << 0)) != 0;
+
+  /*
+   * 00 for knight
+   * 10 for queen
+   * 01 for rook
+   * 11 for bishop
+   */
+  if (!firstFlag && !secondFlag) {
+    // 00
+    return KNIGHT;
+  }
+  if (firstFlag && !secondFlag) {
+    // 10
+    return QUEEN;
+  }
+  if (!firstFlag && secondFlag) {
+    // 01
+    return ROOK;
+  }
+  if (firstFlag && secondFlag) {
+    // 11
+    return BISHOP;
+  }
+  std::cout << "should have never happend";
+  assert(false);
+  return ROOK;
+};
+uint8_t getFromValueFromMove(uint16_t move) { return (move >> 2) & 63; };
+uint8_t getToValueFromMove(uint16_t move) { return (move >> 8) & 63; };
+
 Position FindKing(Game *g, bool color) {
   return IndexToPosition(__builtin_ctzll(g->PieceBitboards[color][KING]));
 }