func GetCgoCharArray() (interface{}, int, int) {
	return C.ca, len(C.ca), cap(C.ca)
}
GetCgoCharArray returns a char array via cgo and the array's len and cap.
This is only used for tests.
package testdata
import "C"
func GetCgoNullCharPointer() interface{} {
	return C.ncp
}
func GetCgoCharPointer() interface{} {
	return C.cp
}