#include <iostream>
#include "eel2/ns-eel.h"

using namespace std;

// these functions must be compiled in but
// actual mutex locking omitted here for brevity in this example
void NSEEL_HOSTSTUB_EnterMutex() {}
void NSEEL_HOSTSTUB_LeaveMutex() {}

int main()
{
    NSEEL_VMCTX vm=NSEEL_VM_alloc(); // create virtual machine
    double* variable_x=NSEEL_VM_regvar(vm,"x"); // register a variable into vm to get a value out
    double* variable_y=NSEEL_VM_regvar(vm,"y"); // register another variable into vm
    double* variable_t=NSEEL_VM_regvar(vm,"t"); // etc
    char codetext[65536]; // this needs to be larger than might be anticipated as eel2 uses this buffer as workspace
    memset(codetext,0,65536);
    strcpy(codetext,"x=2+2;y=sin(t);");
    NSEEL_CODEHANDLE codehandle=NSEEL_code_compile(vm,codetext,0); // compile code
    NSEEL_code_execute(codehandle); // execute code
    cout << "variable x is "<<*variable_x<<std::endl;
    // execute the already compiled code many times
    for (int i=0;i<16;i++)
    {
        *variable_t=i;
        NSEEL_code_execute(codehandle);
        cout << "t="<<*variable_t<<" y="<<*variable_y<<std::endl;
    }
    // especially in production code, remember to deallocate the VMs and codehandles as appropriate
    NSEEL_code_free(codehandle);
    NSEEL_VM_free(vm);
    return 0;
}