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# ===========================================================================
#
# PUBLIC DOMAIN NOTICE
# National Center for Biotechnology Information
#
# This software/database is a "United States Government Work" under the
# terms of the United States Copyright Act. It was written as part of
# the author's official duties as a United States Government employee and
# thus cannot be copyrighted. This software/database is freely available
# to the public for use. The National Library of Medicine and the U.S.
# Government have not placed any restriction on its use or reproduction.
#
# Although all reasonable efforts have been taken to ensure the accuracy
# and reliability of the software and data, the NLM and the U.S.
# Government do not and cannot warrant the performance or results that
# may be obtained by using this software or data. The NLM and the U.S.
# Government disclaim all warranties, express or implied, including
# warranties of performance, merchantability or fitness for any particular
# purpose.
#
# Please cite the author in any work or product based on this material.
#
# ===========================================================================
#
#
from ctypes import cast, c_char_p, c_void_p, POINTER
class ErrorMsg(RuntimeError):
pass
# def check_res(res, ngs_str_error):
# if res != PY_RES_OK:
# raise ErrorMsg(ngs_str_error.getPyString())
def _dereference_byref(byref_arg):
# this helper function exctracts a value of the argument passed to the C-function with byref
# it uses internal variable so it may change in the future version of python
return byref_arg._obj
def check_res_embedded(result, func, args):
from . import PY_RES_OK
if result != PY_RES_OK:
# We rely on the fact that we always have
# POINTER(c_void_p) parameter as the last one
# in args (check_res_embedded is intended to be
# used with ngs-sdk C-functions)
ref_err = _dereference_byref(args[-1]) # void* ref_err = *void_pp; (void** void_pp = args[-1])
assert isinstance(ref_err, c_void_p)
char_p = cast(ref_err, c_char_p) # char* char_p = (char*)ref_err;
raise ErrorMsg(str(char_p.value))
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