// This is core/vgl/io/vgl_io_box_2d.hxx
#ifndef vgl_io_box_2d_hxx_
#define vgl_io_box_2d_hxx_
//:
// \file

#include <iostream>
#include "vgl_io_box_2d.h"
#include <vsl/vsl_binary_io.h>

//============================================================================
//: Binary save self to stream.
template<class T>
void vsl_b_write(vsl_b_ostream &os, const vgl_box_2d<T> & p)
{
  constexpr short io_version_no = 1;
  vsl_b_write(os, io_version_no);
  vsl_b_write(os, p.min_x());
  vsl_b_write(os, p.min_y());
  vsl_b_write(os, p.max_x());
  vsl_b_write(os, p.max_y());
}

//============================================================================
//: Binary load self from stream.
template<class T>
void vsl_b_read(vsl_b_istream &is, vgl_box_2d<T> & p)
{
  if (!is) return;

  short v;
  T min_pos[2];
  T max_pos[2];
  vsl_b_read(is, v);
  switch (v)
  {
   case 1:
    vsl_b_read(is, min_pos[0]);
    vsl_b_read(is, min_pos[1]);
    vsl_b_read(is, max_pos[0]);
    vsl_b_read(is, max_pos[1]);

    p.set_min_x(min_pos[0]);
    p.set_min_y(min_pos[1]);
    p.set_max_x(max_pos[0]);
    p.set_max_y(max_pos[1]);
    break;

   default:
    std::cerr << "I/O ERROR: vsl_b_read(vsl_b_istream&, vgl_box_2d<T>&)\n"
             << "           Unknown version number "<< v << '\n';
    is.is().clear(std::ios::badbit); // Set an unrecoverable IO error on stream
    return;
  }
}

//============================================================================
//: Output a human readable summary to the stream
template<class T>
void vsl_print_summary(std::ostream& os,const vgl_box_2d<T> & p)
{
  if (p.is_empty())
    os<<"Empty 2d box\n";
  else
    os<<"2d box with opposite corners at (" <<p.min_x() << ',' << p.min_y()
      <<") and (" << p.max_x() << ',' << p.max_y() << ")\n";
}

#define VGL_IO_BOX_2D_INSTANTIATE(T) \
template void vsl_print_summary(std::ostream &, const vgl_box_2d<T > &); \
template void vsl_b_read(vsl_b_istream &, vgl_box_2d<T > &); \
template void vsl_b_write(vsl_b_ostream &, const vgl_box_2d<T > &)

#endif // vgl_io_box_2d_hxx_
