Function demzip_prepare_header_for_write

LASlib/src/demzip_dll.cpp:1809–1867

---------------------------------------------------------------------------*/

/*---------------------------------------------------------------------------*/
static I32
demzip_prepare_header_for_write(
    demzip_dll_struct*                 demzip_dll
)
{
  if ((demzip_dll->header.version_major != 1) || (demzip_dll->header.version_minor > 4))
  {
    sprintf(demzip_dll->error, "unknown LAS version %d.%d", (I32)demzip_dll->header.version_major, (I32)demzip_dll->header.version_minor);
    return 1;
  }

  // check counters
  U32 i;

  if (demzip_dll->header.point_data_format > 5)
  {
    // legacy counters are zero for new point types

    demzip_dll->header.number_of_point_records = 0;
    for (i = 0; i < 5; i++)
    {
      demzip_dll->header.number_of_points_by_return[i] = 0;
    }
  }
  else if (demzip_dll->header.version_minor > 3)
  {
    // legacy counters must be zero or consistent for old point types

    if (demzip_dll->header.number_of_point_records != demzip_dll->header.extended_number_of_point_records)
    {
      if (demzip_dll->header.number_of_point_records != 0)
      {
        sprintf(demzip_dll->error, "inconsistent number_of_point_records %u and extended_number_of_point_records %llu", demzip_dll->header.number_of_point_records, demzip_dll->header.extended_number_of_point_records);
        return 1;
      }
      else if (demzip_dll->header.extended_number_of_point_records <= U32_MAX)
      {
        demzip_dll->header.number_of_point_records = (U32)demzip_dll->header.extended_number_of_point_records;
      }
    }
    for (i = 0; i < 5; i++)
    {
      if (demzip_dll->header.number_of_points_by_return[i] != demzip_dll->header.extended_number_of_points_by_return[i])
      {
        if (demzip_dll->header.number_of_points_by_return[i] != 0)
        {
          sprintf(demzip_dll->error, "inconsistent number_of_points_by_return[%u] %u and extended_number_of_points_by_return[%u] %llu", i, demzip_dll->header.number_of_points_by_return[i], i, demzip_dll->header.extended_number_of_points_by_return[i]);
          return 1;
        }
        else if (demzip_dll->header.extended_number_of_points_by_return[i] <= U32_MAX)
        {
          demzip_dll->header.number_of_points_by_return[i] = (U32)demzip_dll->header.extended_number_of_points_by_return[i];
        }
      }
    }
  }

  return 0;