Source code for wheezy.validation.patches

""" ``patches`` module.
"""


def patch_strptime_cache_size(max_size=100):
    """ Patch for strptime regex cache max size.
    """
    try:  # pragma: nocover
        import _strptime
        if not hasattr(_strptime, '_CACHE_MAX_SIZE'):
            return False
        if not hasattr(_strptime, '_cache_lock'):
            return False
    except (ImportError, AttributeError):  # pragma: nocover
        return False

    l = _strptime._cache_lock
    l.acquire()
    try:
        _strptime._CACHE_MAX_SIZE = max_size
    finally:
        l.release()
    return True


def patch_use_cdecimal():  # pragma: nocover
    """ Use cdecimal module globally. Pure python implementation
        in-place replacement.
    """
    import sys
    if sys.version_info[:2] >= (3, 3):
        return True
    try:
        import cdecimal
        sys.modules["decimal"] = cdecimal
        return True
    except ImportError:
        return False