_DoPrepend
bool _DoPrepend(const char* string, int32 length);
_DoPrepend(string, strlen(string));
_DoPrepend(string.String(), string.Length());
_DoPrepend(string, strlen_clamp(string, length));
_DoPrepend(string.fPrivateData, min_clamp0(length, string.Length()));
if (count > 0 && _DoPrepend("", count))