def __vciFormatError(library_instance: CLibrary, function: Callable, vret: int):
"""Format a VCI error and attach failed function and decoded HRESULT
:param CLibrary library_instance:
Mapped instance of IXXAT vcinpl library
:param callable function:
Failed function
:param HRESULT vret:
HRESULT returned by vcinpl call
:return:
Formatted string
"""
buf = ctypes.create_string_buffer(constants.VCI_MAX_ERRSTRLEN)
ctypes.memset(buf, 0, constants.VCI_MAX_ERRSTRLEN)
library_instance.vciFormatError(vret, buf, constants.VCI_MAX_ERRSTRLEN)
return "function {} failed ({})".format(
function._name, buf.value.decode("utf-8", "replace")
)
log = logging.getLogger('can.ixxat')
try:
# since Python 3.3
from time import perf_counter as _timer_function
except ImportError:
from time import clock as _timer_function
# Hack to have vciFormatError as a free function, see below
vciFormatError = None
# main ctypes instance
_canlib = None
if sys.platform == "win32":
try:
_canlib = CLibrary("vcinpl")
except Exception as e:
log.warning("Cannot load IXXAT vcinpl library: %s", e)
elif sys.platform == "cygwin":
try:
_canlib = CLibrary("vcinpl.dll")
except Exception as e:
log.warning("Cannot load IXXAT vcinpl library: %s", e)
else:
# Will not work on other systems, but have it importable anyway for
# tests/sphinx
log.warning("IXXAT VCI library does not work on %s platform", sys.platform)
def __vciFormatErrorExtended(library_instance, function, HRESULT, arguments):
""" Format a VCI error and attach failed function, decoded HRESULT and arguments