serializationArray.cpp

This code demonstrates how to serialize and deserialize an ArrayXf object to/from a file.

This code demonstrates how to serialize and deserialize an ArrayXf object to/from a file.The code creates a 2D array of size 4x2, fills it with float values and writes it to a file. It then reads the data back and prints the content of the array.

#include <iostream>
 
#include <boost/filesystem.hpp>
 
#include <iolink/serialization/Serialization.h>
#include <iolink/storage/StreamAccessFactory.h>
 
using namespace iolink;
 
static void
serializeArrayXf()
{
  // path to a temporary file in the temp directory
  const boost::filesystem::path tmpFilePath = boost::filesystem::temp_directory_path() / "serialization_array_cpp.txt";
 
  VectorXu64 shape{4, 2};
  ArrayXf arrayf(shape);
 
  // fill the array with some values, cell by cell
  arrayf.setAt(VectorXu64{0, 0}, 0.0F);
  arrayf.setAt(VectorXu64{1, 0}, 1.0F);
  arrayf.setAt(VectorXu64{2, 0}, 2.0F);
  arrayf.setAt(VectorXu64{3, 0}, 3.0F);
  arrayf.setAt(VectorXu64{0, 1}, 10.0F);
  arrayf.setAt(VectorXu64{1, 1}, 11.0F);
  arrayf.setAt(VectorXu64{2, 1}, 12.0F);
  arrayf.setAt(VectorXu64{3, 1}, 13.0F);
 
  std::cout << "Serialize array into " << tmpFilePath << std::endl;
 
  // open a streamAccess to serialize the array to a file
  std::shared_ptr<StreamAccess> dst = StreamAccessFactory::openFileWrite(tmpFilePath.string());
 
  if (!dst)
  {
    std::cerr << "Impossible to open file " << tmpFilePath.string() << std::endl;
  }
 
  // array is serialized to the file
  Serialization::encodeArrayXf(arrayf, dst);
 
  // flush and close the streamAccess
  dst.reset();
 
  // open another streamAccess to read the serialized array from the file
  std::shared_ptr<StreamAccess> src = StreamAccessFactory::openFileRead(tmpFilePath.string());
 
  if (!src)
  {
    std::cerr << "Impossible to open file " << tmpFilePath.string() << std::endl;
  }
 
  // array is deserialized from the file
  ArrayXf arrayRead = Serialization::decodeArrayXf(src);
 
  // print the content of the array
  std::cout << "Content of unserialized array:" << arrayRead.toString() << std::endl;
}
 
int
main(int argc, char** argv)
{
  serializeArrayXf();
  return EXIT_SUCCESS;
}