Fix attack to tests

binding/python_c_ffi.py

@@ -28,12 +28,12 @@ FILES = {c:i for i,c in enumerate("abcdefgh")}
 WHITE, BLACK, BOTH = 0, 1, 2
 P, N, B, R, Q, K, p, n, b, r, q, k = range(12)
 
+
 """
     Register C function bindings and interfaces in a dictionary.
 """
 PAWN_MOVE_SIG = ((C.POINTER(Board), C.POINTER(Move), C.POINTER(C.c_int)), None)
 PIECE_MOVE_SIG = ((C.POINTER(Board), C.POINTER(Move), C.POINTER(C.c_int), C.c_bool), None)
-
 FFI_SPEC = {
     "create_knight_attack_cache": None,
     "create_king_attack_cache": None,
@@ -61,9 +61,40 @@ FFI_SPEC = {
 }
 
 
+def draw_bb(mask, origin=None):
+    print("\n")
+    lines = []
+    for r in range(7, -1, -1):
+        row = []
+        for f in range(8):
+            sqi = r * 8 + f
+            bit = (mask >> sqi) & 1
+            if origin is not None and sqi == origin:
+                ch = 'O'
+            elif bit:
+                ch = 'x'
+            else:
+                ch = '.'
+            row.append(ch)
+        lines.append(f"{r+1} " + " ".join(row))
+    lines.append("  " + " ".join(FILES))
+    lines = "\n".join(lines)
+    print(lines, "\n") 
+
+
+def sq_to_coord(sq):
+    return chr(ord('a') + (sq % 8)) + chr(ord('1') + (sq // 8))
+
+
+def sq(name):
+    f = FILES[name[0].lower()]
+    r = int(name[1]) - 1
+    return f + 8 * r
+
+
 class ChessFFI:
     def __init__(self):
-        self.lib_path = "./build/lichess.so"
+        self.lib_path = "./build/libchess.so"
         self._load_lib()
         self._load_constants()
         self._bind_functions()
@@ -76,7 +107,7 @@ class ChessFFI:
 
     
     def load_fen(self, board, fen_string):
-        return self._c_load_fen(C.byref(board), fen_string.encode("ascii"))
+        return self._c_load_fen(board, fen_string.encode("ascii"))
             
 
     def gen_pseudo_moves(self, board, captures_only=False, cap=256):
@@ -98,44 +129,13 @@ class ChessFFI:
 
 
     def attackers_to(self, board, sq, by):
-        return int(self._c_attackers_to(C.byref(board), int(sq), int(by)))
-
-
-    def sq_to_coord(self, sq):
-        return chr(ord('a') + (sq % 8)) + chr(ord('1') + (sq // 8))
-
-
-    def sq(self, name):
-        f = FILES[name[0].lower()]
-        r = int(name[1]) - 1
-        return f + 8 * r
+        return self._c_attackers_to(board, sq, by)
 
 
     def popcount(self, x):
         return x.bit_count()
     
 
-    def draw_bb(self, mask, origin=None):
-        print("\n")
-        lines = []
-        for r in range(7, -1, -1):
-            row = []
-            for f in range(8):
-                sqi = r * 8 + f
-                bit = (mask >> sqi) & 1
-                if origin is not None and sqi == origin:
-                    ch = 'O'
-                elif bit:
-                    ch = 'x'
-                else:
-                    ch = '.'
-                row.append(ch)
-            lines.append(f"{r+1} " + " ".join(row))
-        lines.append("  " + " ".join(FILES))
-        lines = "\n".join(lines)
-        print(lines, "\n") 
-
-
     def _load_lib(self):
         self._lib = C.CDLL(self.lib_path)
 
@@ -164,7 +164,7 @@ class ChessFFI:
 
             if fn is not None:
                 fn.argtypes = argtypes
-                fn.restype  = restype
+                fn.restype = restype
 
             # Prepend each function name with _c to allow us to reuse the 
             # function names as methods on this class. This means that we