HDF5 Archive support

[alvarovm]

Hello,

I wrote subroutines to support HDF5 files, see:
https://github.com/alvarovm/madness/blob/h5files/src/madness/world/h5_archive.h

For now, I am just saving one dataset per file. See example below.

It would be great if you could give feedback. I could clean up and send a PR to the main branch if this is useful.

Thanks

#include <madness/world/info.h>
#include <cstdio>
#include <vector>
#include <iostream>

using namespace madness;

#include <madness/world/h5_archive.h>
using madness::archive::H5OutputArchive;
using madness::archive::H5InputArchive;
template <class OutputArchive>
void test_out(const OutputArchive& oar) {
    constexpr const int n = 3;
    oar & n;
}
int main(int argc, char** argv) {

	std::cout << "git revision " << info::git_commit() << std::endl;
	std::string name = "dsetmad.h5";
	std::vector<int> v = { 7, 5, 16, 8 ,9  };
	std::vector<int> vi = { 0, 0, 0, 0 ,0  };



	    // Print out the vector
        std::cout << "v = { ";
        for (int n : v) {
           std::cout << n << ", ";
        }
        std::cout << "}; \n";
        std::cout << "v is size "<< v.size() <<  std::endl;
        


	{
#Write H5 FILE
	const char *f = "test.h5";
        std::cout << std::endl << "testing h5 archive" << std::endl;
        H5OutputArchive oar(f);
	oar & v;

        oar.flush();
        oar.close();

# Read H5 FILE
        H5InputArchive iar(f);
	iar & vi;
        iar.close();

	    // Print out the vector
        std::cout << "vi = { ";
        for (int n : vi) {
           std::cout << n << ", ";
        }
        std::cout << "}; \n";

	}
	
	return 0;
}

[robertjharrison]

Alvaro ... sorry ... did not see this until now. Is this the same as you just merged into the main tree?

[alvarovm]

Yes. It is the same, just updated