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import ctypes
from ctypes.util import find_library
import os
from evemu import const
from evemu import exception
class EvEmuBase(object):
"""
A base wrapper class for the evemu functions, accessed via ctypes.
"""
def __init__(self, library=""):
if not library:
library = const.LIB
self._lib = ctypes.CDLL(library, use_errno=True)
self._libc = ctypes.CDLL(find_library("c"), use_errno=True)
def _call0(self, api_call, *parameters):
result = api_call(*parameters)
if result == 0 and self.get_c_errno() != 0:
raise exception.ExecutionError, "%s: %s" % (
api_call.__name__, self.get_c_error())
return result
def _call(self, api_call, *parameters):
result = api_call(*parameters)
if result < 0 and self.get_c_errno() != 0:
raise exception.ExecutionError, "%s: %s" % (
api_call.__name__, self.get_c_error())
return result
def get_c_errno(self):
return ctypes.get_errno()
def get_c_error(self):
return os.strerror(ctypes.get_errno())
def get_c_lib(self):
return self._libc
def get_lib(self):
return self._lib
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