void GzWriter::writeString(string s)
{
int16_t i = (int16_t)(s.size());
swap_endian(i);
out.write(reinterpret_cast<const char*>(&i),sizeof(i));
out.write(reinterpret_cast<const char*>(&s[0]),s.size());
}
void writeDouble(double d)
{swap_endian(d); out.write(reinterpret_cast<const char*>(&d),sizeof(d));};
void writeInt(int i)
{swap_endian(i); out.write(reinterpret_cast<const char*>(&i),sizeof(i));};