def _c_call2(c_type1, c_type2, c_fun, *args, handler=None):
'''
Helper to simplify calling C functions where the last two parameters are a
reference to the return value.
'''
p_ret1 = _ffi.new(f'{c_type1}*')
p_ret2 = _ffi.new(f'{c_type2}*')
_handle_error(c_fun(*args, p_ret1, p_ret2), handler)
return p_ret1[0], p_ret2[0]
def _c_call(c_type, c_fun, *args, handler=None):
'''
Helper to simplify calling C functions where the last parameter is a
reference to the return value.
'''
if isinstance(c_type, str):
p_ret = _ffi.new(f'{c_type}*')
else:
p_ret = c_type
_handle_error(c_fun(*args, p_ret), handler)
return p_ret[0]
def _str(f_size, f_str, *args, handler=None):
p_size = _ffi.new('size_t*')
_handle_error(f_size(*args, p_size), handler)
p_str = _ffi.new('char[]', p_size[0])
_handle_error(f_str(*args, p_str, p_size[0]), handler)
return _ffi.string(p_str).decode()