示例#1
0
// decodeType translates a Python object to a Go value.  Its type must be
// non-zero.
func decodeType(pyType C.int, pyValue *C.PyObject) (value interface{}, err error) {
	switch pyType {
	case 0:
		err = getError()

	case 1:
		// nil

	case 2:
		value = false

	case 3:
		value = true

	case 4:
		value = C.GoString(C.PyString_AsString(pyValue))

	case 5:
		value = int(C.PyInt_AsLong(pyValue))

	case 6:
		var overflow C.int
		i := int64(C.PyLong_AsLongLongAndOverflow(pyValue, &overflow))

		switch overflow {
		case -1:
			err = fmt.Errorf("Python integer %s is too small", stringify(pyValue))

		case 0:
			value = i

		case 1:
			n := uint64(C.PyLong_AsUnsignedLongLong(pyValue))
			if n == 0xffffffffffffffff {
				C.PyErr_Clear()
				err = fmt.Errorf("Python integer %s is too large", stringify(pyValue))
			} else {
				value = n
			}
		}

	case 7:
		value = float64(C.PyFloat_AsDouble(pyValue))

	case 8:
		value = complex(C.PyComplex_RealAsDouble(pyValue), C.PyComplex_ImagAsDouble(pyValue))

	case 9:
		return decodeSequence(pyValue)

	case 10:
		return decodeMapping(pyValue)

	default:
		err = fmt.Errorf("unable to translate %s from Python", stringify(C.PyObject_Type(pyValue)))
		return
	}

	return
}
示例#2
0
文件: numeric.go 项目: remh/go-python
// unsigned PY_LONG_LONG PyLong_AsUnsignedLongLong(PyObject *pylong)
// Return a C unsigned long long from a Python long integer. If pylong cannot be represented as an unsigned long long, an OverflowError is raised and (unsigned long long)-1 is returned.
//
// New in version 2.2.
//
// Changed in version 2.7: A negative pylong now raises OverflowError, not TypeError.
func PyLong_AsUnsignedLongLong(self *PyObject) uint64 {
	return uint64(C.PyLong_AsUnsignedLongLong(topy(self)))
}