Move.cpp

#include "Move.h"

// Create a move by packing all components into a 32-bit integer
// Uses bit shifting to efficiently store all move information
Move createMove(int from, int to, int piece, int captured, int promoted, int flags) {
    return (from & FROM_MASK)                    // Bits 0-5: from square
         | ((to & TO_MASK) << 6)                 // Bits 6-11: to square
         | ((piece & PIECE_MASK) << 12)          // Bits 12-15: moving piece
         | ((captured & CAPTURED_MASK) << 16)    // Bits 16-19: captured piece
         | ((promoted & PROMOTED_MASK) << 20)    // Bits 20-23: promotion piece
         | ((flags & FLAGS_MASK) << 24);         // Bits 24-31: move flags
}

// Extract the source square from a move (0-63)
int getFrom(Move move) {
    return move & FROM_MASK;
}

// Extract the destination square from a move (0-63)
int getTo(Move move) {
    return (move >> 6) & TO_MASK;
}

// Extract the moving piece type from a move
int getPiece(Move move) {
    return (move >> 12) & PIECE_MASK;
}

// Extract the captured piece type from a move (0 if no capture)
int getCaptured(Move move) {
    return (move >> 16) & CAPTURED_MASK;
}

// Extract the promotion piece type from a move (0 if no promotion)
int getPromoted(Move move) {
    return (move >> 20) & PROMOTED_MASK;
}

// Extract the move flags from a move
int getFlags(Move move) {
    return (move >> 24) & FLAGS_MASK;
}

// Add a move to the move list by creating and storing the packed move
void MoveList::addMove(int from, int to, int piece, int captured, int promoted, int flags) {
    moves.push_back(createMove(from, to, piece, captured, promoted, flags));
}

// Clear all moves from the list
void MoveList::clear() {
    moves.clear();
}

// Get the number of moves in the list
size_t MoveList::size() const {
    return moves.size();
}

// Access a move by index
Move MoveList::operator[](size_t index) const {
    return moves[index];
}