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+# engine/processors.py
+# Copyright (C) 2010-2024 the SQLAlchemy authors and contributors
+# <see AUTHORS file>
+# Copyright (C) 2010 Gaetan de Menten gdementen@gmail.com
+#
+# This module is part of SQLAlchemy and is released under
+# the MIT License: https://www.opensource.org/licenses/mit-license.php
+
+"""defines generic type conversion functions, as used in bind and result
+processors.
+
+They all share one common characteristic: None is passed through unchanged.
+
+"""
+from __future__ import annotations
+
+import typing
+
+from ._py_processors import str_to_datetime_processor_factory # noqa
+from ..util._has_cy import HAS_CYEXTENSION
+
+if typing.TYPE_CHECKING or not HAS_CYEXTENSION:
+ from ._py_processors import int_to_boolean as int_to_boolean
+ from ._py_processors import str_to_date as str_to_date
+ from ._py_processors import str_to_datetime as str_to_datetime
+ from ._py_processors import str_to_time as str_to_time
+ from ._py_processors import (
+ to_decimal_processor_factory as to_decimal_processor_factory,
+ )
+ from ._py_processors import to_float as to_float
+ from ._py_processors import to_str as to_str
+else:
+ from sqlalchemy.cyextension.processors import (
+ DecimalResultProcessor,
+ )
+ from sqlalchemy.cyextension.processors import ( # noqa: F401
+ int_to_boolean as int_to_boolean,
+ )
+ from sqlalchemy.cyextension.processors import ( # noqa: F401,E501
+ str_to_date as str_to_date,
+ )
+ from sqlalchemy.cyextension.processors import ( # noqa: F401
+ str_to_datetime as str_to_datetime,
+ )
+ from sqlalchemy.cyextension.processors import ( # noqa: F401,E501
+ str_to_time as str_to_time,
+ )
+ from sqlalchemy.cyextension.processors import ( # noqa: F401,E501
+ to_float as to_float,
+ )
+ from sqlalchemy.cyextension.processors import ( # noqa: F401,E501
+ to_str as to_str,
+ )
+
+ def to_decimal_processor_factory(target_class, scale):
+ # Note that the scale argument is not taken into account for integer
+ # values in the C implementation while it is in the Python one.
+ # For example, the Python implementation might return
+ # Decimal('5.00000') whereas the C implementation will
+ # return Decimal('5'). These are equivalent of course.
+ return DecimalResultProcessor(target_class, "%%.%df" % scale).process