Sync

lib/lomka.py

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+class BCCCalculator:
+    """
+    Класс для работы с BCC
+    """
+    
+    @staticmethod
+    def xor_bcc(data):
+        """XOR BCC"""
+        if isinstance(data, str):
+            data = data.encode('utf-8')
+        elif isinstance(data, list):
+            data = bytes(data)
+        
+        bcc = 0
+        for byte in data:
+            bcc ^= byte
+        return bcc
+    
+    @staticmethod
+    def sum_bcc(data):
+        """Суммирование BCC"""
+        if isinstance(data, str):
+            data = data.encode('utf-8')
+        elif isinstance(data, list):
+            data = bytes(data)
+        
+        total = sum(data)
+        return total & 0xFF
+    
+    @staticmethod
+    def verify_bcc(data_with_bcc):
+        """
+        Проверка BCC в данных
+        """
+        if len(data_with_bcc) < 2:
+            return False
+        
+        data = data_with_bcc[:-1]
+        expected_bcc = data_with_bcc[-1]
+        calculated_bcc = BCCCalculator.xor_bcc(data)
+        
+        return expected_bcc == calculated_bcc