dora/examples/c++-dataflow/node-c-api/main.cc

extern "C"
{
#include "../../../apis/c/node/node_api.h"
}

#include <iostream>
#include <vector>

int run(void *dora_context)
{
    unsigned char counter = 0;

    for (int i = 0; i < 20; i++)
    {

        auto input = dora_next_input(dora_context);
        if (input == NULL)
        {
            return 0; // end of input
        }
        counter += 1;

        char *id_ptr;
        size_t id_len;
        read_dora_input_id(input, &id_ptr, &id_len);
        std::string id(id_ptr, id_len);

        char *data_ptr;
        size_t data_len;
        read_dora_input_data(input, &data_ptr, &data_len);
        std::vector<unsigned char> data;
        for (size_t i = 0; i < data_len; i++)
        {
            data.push_back(*(data_ptr + i));
        }

        std::cout
            << "Received input "
            << " (counter: " << (unsigned int)counter << ") data: [";
        for (unsigned char &v : data)
        {
            std::cout << (unsigned int)v << ", ";
        }
        std::cout << "]" << std::endl;

        free_dora_input(input);

        std::vector<unsigned char> out_vec{counter};

        std::string out_id = "counter";

        int result = dora_send_output(dora_context, &out_id[0], out_id.length(), (char *)&counter, 1);
        if (result != 0)
        {
            std::cerr << "failed to send output" << std::endl;
            return 1;
        }
    }
    return 0;
}

int main()
{
    std::cout << "HELLO FROM C++ (using C API)" << std::endl;

    auto dora_context = init_dora_context_from_env();
    auto ret = run(dora_context);
    free_dora_context(dora_context);

    return ret;
}