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-rw-r--r--src/engine/fen.c197
1 files changed, 0 insertions, 197 deletions
diff --git a/src/engine/fen.c b/src/engine/fen.c
deleted file mode 100644
index aa258c9..0000000
--- a/src/engine/fen.c
+++ /dev/null
@@ -1,197 +0,0 @@
-#include <assert.h>
-#include <stdbool.h>
-#include "fen.h"
-#include "bitboard.h"
-
-int get_castling(char c) {
- if (c == 'K') return WHITE_SHORT_CASTLE;
- if (c == 'Q') return WHITE_LONG_CASTLE;
- if (c == 'k') return BLACK_SHORT_CASTLE;
- if (c == 'q') return BLACK_LONG_CASTLE;
- return -1;
-}
-
-int get_turn(char c) {
- if (c == 'w') return WHITE_TURN;
- if (c == 'b') return BLACK_TURN;
- return -1;
-}
-
-int get_piece_enum_item(char c) {
- if (c == 'P') return WHITE_PAWN;
- if (c == 'N') return WHITE_KNIGHT;
- if (c == 'B') return WHITE_BISHOP;
- if (c == 'R') return WHITE_ROOK;
- if (c == 'Q') return WHITE_QUEEN;
- if (c == 'K') return WHITE_KING;
-
- if (c == 'p') return BLACK_PAWN;
- if (c == 'n') return BLACK_KNIGHT;
- if (c == 'b') return BLACK_BISHOP;
- if (c == 'r') return BLACK_ROOK;
- if (c == 'q') return BLACK_QUEEN;
- if (c == 'k') return BLACK_KING;
-
- return -1;
-}
-
-/*
- * from Wikipedia
- * Piece placement data
- * Each rank is described, starting with rank 8 and ending with rank 1,
- * with a "/" between each one; within each rank, the contents of the
- * squares are described in order from the a-file to the h-file.
- * Each piece is identified by a single letter taken from the standard
- * English names in algebraic notation
- * (pawn = "P", knight = "N", bishop = "B",
- * rook = "R", queen = "Q", and king = "K").
- * White pieces are designated using uppercase letters ("PNBRQK"),
- * while black pieces use lowercase letters ("pnbrqk").
- * A set of one or more consecutive empty squares within a rank is denoted
- * by a digit from "1" to "8", corresponding to the number of squares.
- * Active color
- * "w" means that White is to move; "b" means that Black is to move.
- * Castling availability
- * If neither side has the ability to castle, this field uses the character
- * "-". Otherwise, this field contains one or more letters:
- * "K" if White can castle kingside,
- * "Q" if White can castle queenside,
- * "k" if Black can castle kingside,
- * and "q" if Black can castle queenside.
- * A situation that temporarily prevents castling does not
- * prevent the use of this notation.
- * En passant target square
- * This is a square over which a pawn has just passed while moving two
- * squares; it is given in algebraic notation.
- * If there is no en passant target square, this field uses the character "-".
- * This is recorded regardless of whether there is a pawn in position to
- * capture en passant. An updated version of the spec has since made it
- * so the target square is recorded only if a legal en passant capture is
- * possible, but the old version of the standard
- * is the one most commonly used.
- * Halfmove clock
- * The number of halfmoves since the last capture or pawn advance,
- * used for the fifty-move rule.
- * Fullmove number
- * The number of the full moves.
- * It starts at 1 and is incremented after Black's move.
- *
- * e.g. 1B6/2n5/p1N1P2R/P1K3N1/4Pk2/1Q2p2p/6nP/1B4R1 w - - 0 1
- */
-struct fen_load load_fen(const char* fen) {
- position_t position = {0};
-
- int square = 56;
- int i = -1;
- char c;
- while ((c = fen[++i]) != ' ') {
- if (c >= '0' && c <= '9') {
- if (c == '9') return (struct fen_load) { true, position };
- square += c - '0';
- continue;
- }
- if (c == '/') {
- square -= 16;
- continue;
- }
-
- int piece_type = get_piece_enum_item(c);
- if (piece_type == -1) return (struct fen_load) { true, position };
- position.bitboards[piece_type] |= (bitboard_t)1 << square++;
- }
-
- c = fen[++i];
- int turn = get_turn(c);
- if (turn == -1) return (struct fen_load) { true, position };
- position.turn = turn;
- if (fen[++i] != ' ') return (struct fen_load) { true, position };
-
- while ((c = fen[++i]) != ' ') {
- if (c == '-') continue;
- int castling = get_castling(c);
- if (castling == -1) return (struct fen_load) { true, position };
- position.castling |= castling;
- }
-
- c = fen[++i];
- if (c >= 'a' && c <= 'z') {
- if (c > 'h') return (struct fen_load) { true, position };
- position.passantable_file = c - 'a' + 1;
- c = fen[++i];
- if (c < '1' && c > '8') return (struct fen_load) { true, position };
- } else {
- position.passantable_file = 0;
- }
- if (fen[++i] != ' ') return (struct fen_load) { true, position };
-
- while ((c = fen[++i]) != ' ') {
- if (c < '0' || c > '9') return (struct fen_load) { true, position };
- position.halfmove_clock *= 10;
- position.halfmove_clock += c - '0';
- }
-
- while ((c = fen[++i]) != 0) {
- if (c < '0' || c > '9') return (struct fen_load) { true, position };
- position.fullmove_clock *= 10;
- position.fullmove_clock += c - '0';
- }
-
- bool error = !check_valid_position(position);
- return (struct fen_load) { error, position };
-}
-
-#ifdef TEST_MOD
-#include "bitboard.c"
-
-bool test_fen_no_passant() {
- struct fen_load r = load_fen("1B6/2n5/p1N1P2R/P1K3N1/4Pk2/1Q2p2p/6nP/1B4R1 w - - 0 1");
- if (r.failed) return false;
-
- position_t p = r.position;
- if (p.castling != 0) return false;
- if (p.passantable_file != 0) return false;
- return true;
-}
-bool test_fen_passant() {
- struct fen_load r = load_fen("rnbqkbnr/ppp1p1pp/8/3pPp2/8/8/PPPP1PPP/RNBQKBNR w KQkq f6 0 3");
- if (r.failed) return false;
-
- position_t p = r.position;
- if (
- p.castling != (
- WHITE_LONG_CASTLE | WHITE_SHORT_CASTLE |
- BLACK_LONG_CASTLE | BLACK_SHORT_CASTLE
- )
- ) return false;
- if (p.passantable_file != 6) return false;
- return true;
-}
-
-bool test_starting_position() {
- struct fen_load r = load_fen("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1");
- if (r.failed) return false;
-
- position_t position = r.position;
- position_t expected = position_starting();
-
- if (position.castling != expected.castling) return false;
- if (position.passantable_file != expected.passantable_file) return false;
- if (position.turn != expected.turn) return false;
- if (position.fullmove_clock != expected.fullmove_clock) return false;
- if (position.halfmove_clock != expected.halfmove_clock) return false;
- if (position.bitboards[0] != expected.bitboards[0]) return false;
- if (position.bitboards[1] != expected.bitboards[1]) return false;
- if (position.bitboards[2] != expected.bitboards[2]) return false;
- if (position.bitboards[3] != expected.bitboards[3]) return false;
- if (position.bitboards[4] != expected.bitboards[4]) return false;
- if (position.bitboards[5] != expected.bitboards[5]) return false;
- if (position.bitboards[6] != expected.bitboards[6]) return false;
- if (position.bitboards[7] != expected.bitboards[7]) return false;
- if (position.bitboards[8] != expected.bitboards[8]) return false;
- if (position.bitboards[9] != expected.bitboards[9]) return false;
- if (position.bitboards[10] != expected.bitboards[10]) return false;
- if (position.bitboards[11] != expected.bitboards[11]) return false;
-
- return true;
-}
-#endif
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