310 lines
7 KiB
Python
310 lines
7 KiB
Python
import enum
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import gdb.printing
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class Square(object):
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"""
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Python representation of a 'seer::board::square::Square' raw value.
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"""
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FILES = list(map(lambda n: chr(ord("A") + n), range(8)))
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RANKS = list(map(lambda n: str(n + 1), range(8)))
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def __init__(self, val):
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self._val = val
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def __str__(self):
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return self.FILES[self.file] + self.RANKS[self.rank]
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@property
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def rank(self):
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return int(self._val) % 8
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@property
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def file(self):
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return int(self._val) // 8
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class Bitboard(object):
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"""
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Python representation of a 'seer::board::bitboard::Bitboard' raw value.
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"""
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def __init__(self, val):
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self._val = val
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def __str__(self):
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return "[" + ", ".join(map(str, self.squares)) + "]"
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@property
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def squares(self):
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n = self._val
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while n:
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b = n & (~n + 1)
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yield Square(b.bit_length() - 1)
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n ^= b
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class CastleRights(enum.IntEnum):
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"""
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Python representation of a 'seer::board::castle_rights::CastleRights' raw value.
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"""
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# Should be kept in sync with the enum in `color.rs`
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NO_SIDE = 0
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KING_SIDE = 1
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QUEEN_SIDE = 2
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BOTH_SIDES = 3
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def __str__(self):
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return self.name.title().replace("_", "")
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class Color(enum.IntEnum):
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"""
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Python representation of a 'seer::board::color::Color' raw value.
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"""
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# Should be kept in sync with the enum in `color.rs`
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WHITE = 0
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BLACK = 1
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def __str__(self):
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return self.name.title()
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class File(enum.IntEnum):
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"""
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Python representation of a 'seer::board::file::File' raw value.
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"""
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# Should be kept in sync with the enum in `file.rs`
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A = 0
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B = 1
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C = 2
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D = 3
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E = 4
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F = 5
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G = 6
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H = 7
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def __str__(self):
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return self.name.title()
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class Rank(enum.IntEnum):
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"""
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Python representation of a 'seer::board::rank::Rank' raw value.
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"""
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# Should be kept in sync with the enum in `rank.rs`
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First = 0
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Second = 1
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Third = 2
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Fourth = 3
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Fifth = 4
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Sixth = 5
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Seventh = 6
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Eighth = 7
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def __str__(self):
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return self.name.title()
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class Piece(enum.IntEnum):
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"""
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Python representation of a 'seer::board::piece::Piece' raw value.
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"""
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# Should be kept in sync with the enum in `piece.rs`
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KING = 0
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QUEEN = 1
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ROOK = 2
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BISHOP = 3
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KNIGHT = 4
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PAWN = 5
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def __str__(self):
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return self.name.title()
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class Move(object):
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"""
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Wrapper around GDB's representation of a 'seer::board::move::Move'
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in memory.
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"""
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# Should be kept in sync with the values in `move.rs`
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PIECE_SHIFT = 0
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PIECE_MASK = 0b111
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START_SHIFT = 3
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START_MASK = 0b11_1111
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DESTINATION_SHIFT = 9
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DESTINATION_MASK = 0b11_1111
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CAPTURE_SHIFT = 15
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CAPTURE_MASK = 0b111
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PROMOTION_SHIFT = 18
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PROMOTION_MASK = 0b111
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EN_PASSANT_SHIFT = 21
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EN_PASSANT_MASK = 0b1
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DOUBLE_STEP_SHIFT = 22
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DOUBLE_STEP_MASK = 0b1
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CASTLING_SHIFT = 23
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CASTLING_MASK = 0b1
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def __init__(self, val):
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self._val = val
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@property
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def piece(self):
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return Piece(self._val >> self.PIECE_SHIFT & self.PIECE_MASK)
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@property
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def start(self):
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return Square(self._val >> self.START_SHIFT & self.START_MASK)
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@property
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def destination(self):
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return Square(self._val >> self.DESTINATION_SHIFT & self.DESTINATION_MASK)
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@property
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def capture(self):
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index = self._val >> self.CAPTURE_SHIFT & self.CAPTURE_MASK
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if index == 7:
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return None
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return Piece(index)
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@property
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def promotion(self):
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index = self._val >> self.PROMOTION_SHIFT & self.PROMOTION_MASK
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if index == 7:
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return None
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return Piece(index)
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@property
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def en_passant(self):
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return bool(self._val >> self.EN_PASSANT_SHIFT & self.EN_PASSANT_MASK)
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@property
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def double_step(self):
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return bool(self._val >> self.DOUBLE_STEP_SHIFT & self.DOUBLE_STEP_MASK)
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@property
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def castling(self):
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return bool(self._val >> self.CASTLING_SHIFT & self.CASTLING_MASK)
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def __str__(self):
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KEYS = [
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"piece",
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"start",
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"destination",
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"capture",
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"promotion",
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"en_passant",
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"double_step",
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"castling",
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]
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print_opt = lambda val: "(None)" if val is None else str(val)
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indent = lambda s: " " + s
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values = [key + ": " + print_opt(getattr(self, key)) + ",\n" for key in KEYS]
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return "Move{\n" + "".join(map(indent, values)) + "}"
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class SquarePrinter(object):
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"Print a seer::board::square::Square"
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def __init__(self, val):
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self._val = Square(val)
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def to_string(self):
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return str(self._val)
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class BitboardPrinter(object):
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"Print a seer::board::bitboard::Bitboard"
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def __init__(self, val):
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self._val = Bitboard(int(val["__0"]))
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def to_string(self):
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return "Bitboard{" + str(self._val)[1:-1] + "}"
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class CastleRightsPrinter(object):
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"Print a seer::board::castle_rights::CastleRights"
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def __init__(self, val):
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self._val = CastleRights(int(val))
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def to_string(self):
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return str(self._val)
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class ColorPrinter(object):
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"Print a seer::board::color::Color"
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def __init__(self, val):
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self._val = Color(int(val))
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def to_string(self):
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return str(self._val)
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class FilePrinter(object):
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"Print a seer::board::file::File"
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def __init__(self, val):
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self._val = File(int(val))
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def to_string(self):
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return str(self._val)
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class RankPrinter(object):
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"Print a seer::board::rank::Rank"
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def __init__(self, val):
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self._val = Rank(int(val))
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def to_string(self):
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return str(self._val)
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class PiecePrinter(object):
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"Print a seer::board::piece::Piece"
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def __init__(self, val):
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self._val = Piece(int(val))
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def to_string(self):
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return str(self._val)
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class MovePrinter(object):
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"Print a seer::board::move::Move"
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def __init__(self, val):
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self._val = Move(int(val["__0"]))
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def to_string(self):
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return str(self._val)
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def build_pretty_printer():
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pp = gdb.printing.RegexpCollectionPrettyPrinter('seer')
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pp.add_printer('Square', '^seer::board::square::Square$', SquarePrinter)
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pp.add_printer('Bitboard', '^seer::board::bitboard::Bitboard$', BitboardPrinter)
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pp.add_printer('CastleRights', '^seer::board::castle_rights::CastleRights$', CastleRightsPrinter)
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pp.add_printer('Color', '^seer::board::color::Color$', ColorPrinter)
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pp.add_printer('File', '^seer::board::file::File$', FilePrinter)
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pp.add_printer('Rank', '^seer::board::rank::Rank$', RankPrinter)
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pp.add_printer('Piece', '^seer::board::piece::Piece$', ColorPrinter)
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pp.add_printer('Move', '^seer::board::move::Move$', MovePrinter)
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return pp
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gdb.printing.register_pretty_printer(gdb.current_objfile(), build_pretty_printer(), True)
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