FetchContent_Declare(
uCSV
GIT_REPOSITORY https://github.com/fytch/uCSV.git
)
FetchContent_MakeAvailable(uCSV)
target_link_libraries(YOURPROGRAM uCSV)#include <uCSV.hpp>
#include <fstream>
#include <iostream>
#include <iterator>
#include <deque>
namespace foo
{
struct vec3
{
double x, y, z;
};
void deserialize(uCSV::Deserializer& data, vec3& vec)
{
using uCSV::deserialize;
deserialize(data, vec.x);
deserialize(data, vec.y);
deserialize(data, vec.z);
}
}
int main()
{
// This file is supposed to be structured as follows:
// 0,0,1
// 0.2,0.3,-0.4
// ...
std::ifstream file1("vecs.csv", std::ifstream::binary);
if(!file1.is_open())
{
std::cerr << "vecs.csv couldn't be opened\n";
return 1;
}
uCSV::Reader reader1(file1, uCSV::ErrorLog(std::cerr), uCSV::Delimiter<','>{}, uCSV::ignoreHeader);
std::deque<foo::vec3> vecs;
reader1.fetchAll(std::back_inserter(vecs));
// This file is supposed to be structured as follows:
// id,px,py,pz,vx,vy,vz
// 0,2,2,3,1,0,0
// ...
std::ifstream file2("particles.csv", std::ifstream::binary);
if(!file2.is_open())
{
std::cerr << "particles.csv couldn't be opened\n";
return 1;
}
uCSV::Reader reader2(file2, uCSV::ErrorLog(std::cerr), uCSV::readHeader);
std::deque<int> ids;
std::deque<foo::vec3> positions;
std::deque<foo::vec3> velocities;
while(!reader2.done())
{
int id;
foo::vec3 p, v;
std::optional<uCSV::Deserializer> des = reader2.fetch();
if(!des)
break;
uCSV::deserializeMany(*des, id, p, v);
ids.push_back(id);
positions.emplace_back(std::move(p));
velocities.emplace_back(std::move(v));
}
}