source: trunk/FACT++/src/InterpreterV8-4.cc@ 20075

#include "InterpreterV8.h"

#ifdef HAVE_V8

#include <fstream>
#include <sstream>
#include <iomanip>

#include <sys/stat.h>

#include <boost/tokenizer.hpp>
#include <boost/filesystem.hpp>
#include <boost/algorithm/string/join.hpp>

#ifdef HAVE_NOVA
#include "nova.h"
#endif

#ifdef HAVE_SQL
#include "Database.h"
#endif

#include <v8.h>
#include <libplatform/libplatform.h>

#include "dim.h"
#include "tools.h"
#include "Readline.h"
#include "izstream.h"

#include "WindowLog.h"

using namespace std;
using namespace v8;

v8::Handle<v8::FunctionTemplate> InterpreterV8::fTemplateLocal;
v8::Handle<v8::FunctionTemplate> InterpreterV8::fTemplateSky;
v8::Handle<v8::FunctionTemplate> InterpreterV8::fTemplateEvent;
v8::Handle<v8::FunctionTemplate> InterpreterV8::fTemplateDescription;
//v8::Handle<v8::FunctionTemplate> InterpreterV8::fTemplateDatabase;


// ==========================================================================
//                           Some documentation
// ==========================================================================
//
// Threads:
// --------
// In most cases Js* and other calls to native C++ code could be wrapped
// with an Unlocker to allow possible other JavaScipt 'threads' to run
// during that time. However, all of these calls should take much less than
// the preemption time of 10ms, so it would just be a waste of tim.
//
// Termination:
// ------------
// Each thread running V8 code needs to be signalled individually for
// termination. Therefor a list of V8 thread ids is created.
//
// If termination has already be signalled, no thread should start running
// anymore (thy could, e.g., wait for their locking). So after locking
// it has to be checked if the thread was terminated already. Note
// that all calls to Terminate() must be locked to ensure that fThreadId
// is correct when it is checked.
//
// The current thread id must be added to fThreadIds _before_ any
// function is called after Locking and before execution is given
// back to JavaScript, e.g. in script->Run(). So until the thread
// is added to the list Terminate will not be executed. If Terminate
// is then executed, it is ensured that the current thread is
// already in the list. If terminate has been called before
// the Locking, the check for the validiy of fThreadId ensures that
// nothing is executed.
//
// Empty handles:
// --------------
// If exceution is terminated, V8 calls might return with empty handles,
// e.g. Date::New(isolate). Therefore, the returned handles of these calls have to
// be checked in all placed to avoid that V8 will core dump.
//
// HandleScope:
// ------------
// A handle scope is a garbage collector and collects all handles created
// until it goes out of scope. Handles which are not needed anymore are
// then deleted. To return a handle from a HandleScope you need to use
// Close(). E.g., String::Utf8Value does not create a new handle and
// hence does not need a HandleScope. Any ::New will need a handle scope.
// Forgetting the HandleScope could in principle fill your memory,
// but everything is properly deleted by the global HandleScope at
// script termination.
//
// Here is another good reference for v8, also containing some
// good explanations for the meaning of handles, persistent handles
// and weak handles: http://create.tpsitulsa.com/wiki/V8_Cookbook
//
// ==========================================================================
//                            Simple interface
// ==========================================================================

typedef FunctionCallbackInfo<Value> Arguments;

void InterpreterV8::FuncExit(const Arguments &)
{
    fMainThread->TerminateExecution();

    // we have to throw an excption to make sure that the
    // calling thread does not go on executing until it
    // has realized that it should terminate

    //*NEw* FIXME: Which Thread???
    Isolate* isolate = Isolate::GetCurrent();
    isolate->ThrowException(Null(isolate));
}

void InterpreterV8::FuncSleep(const Arguments& args)
{
    Isolate* isolate = Isolate::GetCurrent();

    if (args.Length()==0)
    {
        // Theoretically, the CPU usage can be reduced by maybe a factor
        // of four using a larger value, but this also means that the
        // JavaScript is locked for a longer time.
        const Unlocker unlock(isolate);
        usleep(1000);
        return;
    }

    if (args.Length()!=1)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Number of arguments must be exactly 1."));
        return;
    }

    if (!args[0]->IsUint32())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 1 must be an uint32."));
        return;
    }

    // Using a Javascript function has the advantage that it is fully
    // interruptable without the need of C++ code
    const string code =
        "(function(){"
        "var t=new Date();"
        "while ((new Date()-t)<"+to_string(args[0]->Int32Value())+") v8.sleep();"
        "})();";

    args.GetReturnValue().Set(ExecuteInternal(code));
}

void InterpreterV8::FuncTimeout(const Arguments &args)
{
    Isolate* isolate = Isolate::GetCurrent();

    if (args.Length()<2)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Number of arguments must be at least two."));
        return;
    }

    if (!args[0]->IsNull() && !args[0]->IsInt32())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 0 not null and not an int32."));
        return;
    }

    if (!args[1]->IsFunction())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 1 not a function."));
        return;
    }

    if (args.Length()>2 && !args[2]->IsObject())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 2 not an object."));
        return;
    }

    const int32_t timeout = args[0]->IsNull() ? 0 : args[0]->Int32Value();
    const bool    null    = args[0]->IsNull();

    HandleScope handle_scope(isolate);

    Handle<Function> func = Handle<Function>::Cast(args[1]);

    const int nn = args.Length()==2 ? 0 : args.Length()-3;

    vector<Handle<Value>> argv(nn);
    for (int i=0; i<nn; i++)
        argv[i] = args[i+3];

    Time t;
    while (1)
    {
        const Handle<Value> rc = args.Length()<3 ?
            func->Call(func, nn, argv.data()) :
            func->Call(args[2]->ToObject(), nn, argv.data());

        if (rc.IsEmpty())
            return;
        
        if (!rc->IsUndefined())
        {
            args.GetReturnValue().Set(rc);
            return;
        }

        if (!null && Time()-t>=boost::posix_time::milliseconds(abs(timeout)))
            break;

        // Theoretically, the CPU usage can be reduced by maybe a factor
        // of four using a larger value, but this also means that the
        // JavaScript is locked for a longer time.
        const Unlocker unlock(isolate);
        usleep(1000);
    }

    if (timeout<0)
        return;

    isolate->ThrowException(String::NewFromUtf8(isolate, "Waiting for func to return a defined value timed out."));
}

void InterpreterV8::Thread(int &id, Persistent<Object> _this, Persistent<Function> func, uint32_t ms)
{
    /*
    Isolate *isolate = Isolate::GetCurrent();

    const Locker lock(isolate);

    if (fThreadId<0)
    {
        id = -1;
        return;
    }

    // Warning: As soon as id is set, the parent of this thread might terminate
    //          and hance the reference to id does not exist anymore. So, id
    //          is just a kind of return value and must not be used at all
    //          otherwise.

    const int id_local = V8::GetCurrentThreadId();
    id = id_local;
    fThreadIds.insert(id_local);

    const HandleScope handle_scope(isolate);

    func->CreationContext()->Enter();

    TryCatch exception;

    const bool rc = ms==0 || !ExecuteInternal("v8.sleep("+to_string(ms)+");").IsEmpty();
    if (rc)
    {
        if (_this.IsEmpty())
            func->Call(func, 0, NULL);
        else
            func->Call(_this, 0, NULL);
    }

    func.Dispose();
    _this.Dispose();

    fThreadIds.erase(id_local);

    if (!HandleException(exception, "thread"))
        V8::TerminateExecution(isolate);

    func->CreationContext()->Exit();
    */
}

void InterpreterV8::FuncThread(const Arguments& args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (!args.IsConstructCall())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Thread must be called as constructor."));
        return;
    }

    if (args.Length()!=2 && args.Length()!=3)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Number of arguments must be two or three."));
        return;
    }


    if (!args[0]->IsUint32())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 0 not an uint32."));
        return;
    }


    if (!args[1]->IsFunction())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 1 not a function."));
        return;
    }

    if (args.Length()==3 && !args[2]->IsObject())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 2 not an object."));
        return;
    }

    //*NEW or OLD?*
    //if (!args.IsConstructCall())
    //    return Constructor(args);
/*
    const HandleScope handle_scope(isolate);

    Handle<Function> handle = Handle<Function>::Cast(args[1]);

    Persistent<Function> func = Persistent<Function>::New(isolate, handle);
    Persistent<Object> _this;
    if (args.Length()==3)
        _this = Persistent<Object>::New(args[2]->ToObject());

    const uint32_t ms = args[0]->Uint32Value();

    int id=-2;
    fThreads.push_back(thread(bind(&InterpreterV8::Thread, this, ref(id), _this, func, ms)));
    {
        // Allow the thread to lock, so we can get the thread id.
        const Unlocker unlock(isolate);
        while (id==-2)
            usleep(1);
    }
*/
//    Handle<Object> self = args.This();
//    self->Set(String::NewFromUtf8(isolate, "id"), Integer::NewFromUnsigned(isolate, id)/*, ReadOnly*/);
//    self->Set(String::NewFromUtf8(isolate, "kill"), FunctionTemplate::New(isolate, WrapKill)->GetFunction()/*, ReadOnly*/);
//    args.GetReturnValue().Set(self);
}

void InterpreterV8::FuncKill(const Arguments& args)
{
    /*
    Isolate *isolate = Isolate::GetCurrent();

    const uint32_t id = args.This()->Get(String::NewFromUtf8(isolate, "id"))->Uint32Value();

    V8::TerminateExecution(id);

    // DISPOSE?

    return Boolean::New(fThreadIds.erase(id));
    */
}

void InterpreterV8::FuncSend(const Arguments& args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()==0)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Number of arguments must be at least 1."));
        return;
    }

    if (!args[0]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 1 must be a string."));
        return;
    }

    string command = *String::Utf8Value(args[0]);

    if (command.length()==0)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Server name empty."));
        return;
    }

    if (args.Length()==0)
    {
        if (command.find_first_of('/')==string::npos)
            command += "/";
    }

    // Escape all string arguments. All others can be kept as they are.
    for (int i=1; i<args.Length(); i++)
    {
        string arg = *String::Utf8Value(args[i]);

        // Escape string
        if (args[i]->IsString())
        {
            boost::replace_all(arg, "\\", "\\\\");
            boost::replace_all(arg, "'", "\\'");
            boost::replace_all(arg, "\"", "\\\"");
        }

        command += " "+arg;
    }

    try
    {
        args.GetReturnValue().Set(JsSend(command));
    }
    catch (const runtime_error &e)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, e.what()));
    }
}

// ==========================================================================
//                               State control
// ==========================================================================

void InterpreterV8::FuncWait(const Arguments& args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()!=2 && args.Length()!=3)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Number of arguments must be 2 or 3."));
        return;
    }

    if (!args[0]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 1 not a string."));
        return;
    }

    if (!args[1]->IsInt32() && !args[1]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 2 not an int32 and not a string."));
        return;
    }

    if (args.Length()==3 && !args[2]->IsInt32() && !args[2]->IsUndefined())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 3 not an int32 and not undefined."));
        return;
    }

    // Using a Javascript function has the advantage that it is fully
    // interruptable without the need of C++ code

    const string index   = args[1]->IsInt32() ? "s.index" : "s.name";
    const bool   timeout = args.Length()==3 && !args[2]->IsUndefined();
    const string arg0    = *String::Utf8Value(args[0]);
    const string state   = args[1]->IsString() ? *String::Utf8Value(args[1]) : "";
    const string arg1    = args[1]->IsString() ? ("\""+state+"\"") : to_string(args[1]->Int32Value());
    const bool   isNot   = arg0[0]=='!';
    const string name    = isNot ? arg0.substr(1) : arg0;

    if (arg0.find_first_of("\"'")!=string::npos)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Server name must not contain quotation marks."));
        return;
    }

    if (args[1]->IsString())
        if (state.find_first_of("\"'")!=string::npos)
        {
            isolate->ThrowException(String::NewFromUtf8(isolate, "State name must not contain quotation marks."));
            return;
        }

    string code =  "(function(name,state,ms)"
                   "{";
    if (timeout)
        code +=       "var t = new Date();";
    code +=           "var s;"
                      "while (1)"
                      "{"
                         "s = dim.state(name);"
                         "if(!s)throw new Error('Waiting for state "+arg1+" of server "+arg0+" failed.');";
    if (isNot)
        code +=
                         "if(state!="+index+")return true;";
    else
        code +=
                         "if(state=="+index+")return true;";
    if (timeout)
        code +=          "if((new Date()-t)>Math.abs(ms))break;";

    code +=              "v8.sleep();"
                      "}";
    if (timeout)
        code +=       "if(ms>0)throw new Error('Waiting for state "+arg1+" of server "+arg0+" ['+"+index+"+'] timed out.');";
    code +=           "return false;"
                   "})('"+name+"',"+arg1;
    if (timeout)
        code +=    "," + (args[2]->IsUndefined()?"undefined":to_string(args[2]->Int32Value()));
    code +=        ");";

    args.GetReturnValue().Set(ExecuteInternal(code));
}

void InterpreterV8::FuncState(const Arguments& args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()!=1)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Number of arguments must be exactly 1."));
        return;
    }

    if (!args[0]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 1 must be a string."));
        return;
    }

    // Return state.name/state.index

    const String::Utf8Value str(args[0]);

    const State rc = JsState(*str);
    if (rc.index<=-256)
        return;

    const HandleScope handle_scope(isolate);

    Handle<ObjectTemplate> obj = ObjectTemplate::New(isolate);
    if (obj.IsEmpty())
        return;

    obj->Set(String::NewFromUtf8(isolate, "server"), String::NewFromUtf8(isolate, *str),            ReadOnly);
    obj->Set(String::NewFromUtf8(isolate, "index"),  Integer::New(isolate, rc.index),               ReadOnly);
    obj->Set(String::NewFromUtf8(isolate, "name"),   String::NewFromUtf8(isolate, rc.name.c_str()), ReadOnly);

    MaybeLocal<Value> date = Date::New(isolate->GetCurrentContext(), rc.time.JavaDate());
    if (rc.index>-256 && !date.IsEmpty())
        obj->Set(String::NewFromUtf8(isolate, "time"), date.ToLocalChecked());

    args.GetReturnValue().Set(obj->NewInstance());
}

void InterpreterV8::FuncNewState(const Arguments& args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()<1 || args.Length()>3)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Number of arguments must be 1, 2 or 3."));
        return;
    }

    if (!args[0]->IsUint32())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 1 must be an uint32."));
        return;
    }
    if (args.Length()>1 && !args[1]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 2 must be a string."));
        return;
    }
    if (args.Length()>2 && !args[2]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 3 must be a string."));
        return;
    }

    const uint32_t index   = args[0]->Int32Value();
    const string   name    = *String::Utf8Value(args[1]);
    const string   comment = *String::Utf8Value(args[2]);

    if (index<10 || index>255)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "State must be in the range [10, 255]."));
        return;
    }

    if (name.empty())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "State name must not be empty."));
        return;
    }

    if (name.find_first_of(':')!=string::npos || name.find_first_of('=')!=string::npos)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "State name must not contain : or =."));
        return;
    }

    struct Find : State
    {
        Find(int idx, const string &n) : State(idx, n) { }
        bool operator()(const pair<int, string> &p) { return index==p.first || name==p.second; }
    };

    if (find_if(fStates.begin(), fStates.end(), Find(index, name))!=fStates.end())
    {
        const string what =
            "State index ["+to_string(index)+"] or name ["+name+"] already defined.";

        isolate->ThrowException(String::NewFromUtf8(isolate, what.c_str()));
        return;
    }

    args.GetReturnValue().Set(JsNewState(index, name, comment));
}

void InterpreterV8::FuncSetState(const Arguments& args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()!=1)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Number of arguments must be exactly 1."));
        return;
    }

    if (!args[0]->IsUint32() && !args[0]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument must be an uint32 or a string."));
        return;
    }

    int index = -2;
    if (args[0]->IsUint32())
    {
        index = args[0]->Int32Value();
    }
    else
    {
        const string name = *String::Utf8Value(args[0]);
        index = JsGetState(name);
        if (index==-2)
        {
            isolate->ThrowException(String::NewFromUtf8(isolate, ("State '"+name+"' not found.").c_str()));
            return;
        }
    }

    if (index<10 || index>255)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "State must be in the range [10, 255]."));
        return;
    }

    args.GetReturnValue().Set(JsSetState(index));
}

void InterpreterV8::FuncGetState(const Arguments& args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()>0)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "getState must not take arguments."));
        return;
    }

    const State state = JsGetCurrentState();

    const HandleScope handle_scope(isolate);

    Handle<ObjectTemplate> obj = ObjectTemplate::New(isolate);
    if (obj.IsEmpty())
        return;

    obj->Set(String::NewFromUtf8(isolate, "index"),       Integer::New(isolate, state.index),                  ReadOnly);
    obj->Set(String::NewFromUtf8(isolate, "name"),        String::NewFromUtf8(isolate, state.name.c_str()),    ReadOnly);
    obj->Set(String::NewFromUtf8(isolate, "description"), String::NewFromUtf8(isolate, state.comment.c_str()), ReadOnly);

    args.GetReturnValue().Set(obj->NewInstance());
}

void InterpreterV8::FuncGetStates(const Arguments& args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()>1)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "getStates must not take more than one arguments."));
        return;
    }

    if (args.Length()==1 && !args[0]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument must be a string."));
        return;
    }

    const string server = args.Length()==1 ? *String::Utf8Value(args[0]) : "DIM_CONTROL";

    const vector<State> states = JsGetStates(server);

    const HandleScope handle_scope(isolate);

    Handle<Object> obj = Object::New(isolate);
    if (obj.IsEmpty())
        return;

    for (auto it=states.begin(); it!=states.end(); it++)
    {
        Handle<Value> entry = StringObject::New(String::NewFromUtf8(isolate, it->name.c_str()));
        if (entry.IsEmpty())
            return;

        StringObject::Cast(*entry)->Set(String::NewFromUtf8(isolate, "description"), String::NewFromUtf8(isolate, it->comment.c_str())/*, ReadOnly*/);
        obj->Set(Integer::New(isolate, it->index), entry/*, ReadOnly*/);
    }

    args.GetReturnValue().Set(obj);
}

void InterpreterV8::FuncGetDescription(const Arguments& args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()!=1)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "getDescription must take exactly one argument."));
        return;
    }

    if (args.Length()==1 && !args[0]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument must be a string."));
        return;
    }

    const string service = *String::Utf8Value(args[0]);

    const vector<Description> descriptions = JsGetDescription(service);
    const set<Service> services = JsGetServices();

    auto is=services.begin();
    for (; is!=services.end(); is++)
        if (is->name==service)
            break;

    if (is==services.end())
        return;

    const HandleScope handle_scope(isolate);

    Local<Context> context = isolate->GetCurrentContext();
    MaybeLocal<Object> marr = fTemplateDescription->GetFunction()->NewInstance(context);
    if (marr.IsEmpty())
        return;

    Local<Object> arr = marr.ToLocalChecked();

    auto it=descriptions.begin();
    arr->Set(String::NewFromUtf8(isolate, "name"), String::NewFromUtf8(isolate, it->name.c_str())/*, ReadOnly*/);
    if (!it->comment.empty())
        arr->Set(String::NewFromUtf8(isolate, "description"), String::NewFromUtf8(isolate, it->comment.c_str())/*, ReadOnly*/);
    if (is!=services.end())
    {
        arr->Set(String::NewFromUtf8(isolate, "server"), String::NewFromUtf8(isolate, is->server.c_str())/*, ReadOnly*/);
        arr->Set(String::NewFromUtf8(isolate, "service"), String::NewFromUtf8(isolate, is->service.c_str())/*, ReadOnly*/);
        arr->Set(String::NewFromUtf8(isolate, "isCommand"), Boolean::New(isolate, is->iscmd)/*, ReadOnly*/);
        if (!is->format.empty())
            arr->Set(String::NewFromUtf8(isolate, "format"), String::NewFromUtf8(isolate, is->format.c_str())/*, ReadOnly*/);
    }

    uint32_t i=0;
    for (it++; it!=descriptions.end(); it++)
    {
        Handle<Object> obj = Object::New(isolate);
        if (obj.IsEmpty())
            return;

        if (!it->name.empty())
            obj->Set(String::NewFromUtf8(isolate, "name"), String::NewFromUtf8(isolate, it->name.c_str())/*, ReadOnly*/);
        if (!it->comment.empty())
            obj->Set(String::NewFromUtf8(isolate, "description"), String::NewFromUtf8(isolate, it->comment.c_str())/*, ReadOnly*/);
        if (!it->unit.empty())
            obj->Set(String::NewFromUtf8(isolate, "unit"), String::NewFromUtf8(isolate, it->unit.c_str())/*, ReadOnly*/);

        arr->Set(i++, obj);
    }

    args.GetReturnValue().Set(arr);
}

void InterpreterV8::FuncGetServices(const Arguments& args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()>2)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "getServices must not take more than two argument."));
        return;
    }

    if (args.Length()>=1 && !args[0]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "First argument must be a string."));
        return;
    }

    if (args.Length()==2 && !args[1]->IsBoolean())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Second argument must be a boolean."));
        return;
    }

    string arg0 = args.Length() ? *String::Utf8Value(args[0]) : "";
    if (arg0=="*")
        arg0="";

    const set<Service> services = JsGetServices();

    const HandleScope handle_scope(isolate);

    Handle<Array> arr = Array::New(isolate);
    if (arr.IsEmpty())
        return;

    uint32_t i=0;
    for (auto is=services.begin(); is!=services.end(); is++)
    {
        if (!arg0.empty() && is->name.find(arg0)!=0)
            continue;

        if (args.Length()==2 && args[1]->BooleanValue()!=is->iscmd)
            continue;

        Handle<Object> obj = Object::New(isolate);
        if (obj.IsEmpty())
            return;

        obj->Set(String::NewFromUtf8(isolate, "name"), String::NewFromUtf8(isolate, is->name.c_str())/*, ReadOnly*/);
        obj->Set(String::NewFromUtf8(isolate, "server"), String::NewFromUtf8(isolate, is->server.c_str())/*, ReadOnly*/);
        obj->Set(String::NewFromUtf8(isolate, "service"), String::NewFromUtf8(isolate, is->service.c_str())/*, ReadOnly*/);
        obj->Set(String::NewFromUtf8(isolate, "isCommand"), Boolean::New(isolate, is->iscmd)/*, ReadOnly*/);
        if (!is->format.empty())
            obj->Set(String::NewFromUtf8(isolate, "format"), String::NewFromUtf8(isolate, is->format.c_str())/*, ReadOnly*/);

        arr->Set(i++, obj);
    }

    args.GetReturnValue().Set(arr);
}

// ==========================================================================
//                             Internal functions
// ==========================================================================


// The callback that is invoked by v8 whenever the JavaScript 'print'
// function is called.  Prints its arguments on stdout separated by
// spaces and ending with a newline.
void InterpreterV8::FuncLog(const Arguments& args)
{
    for (int i=0; i<args.Length(); i++)
    {
        const String::Utf8Value str(args[i]);
        if (*str)
            JsPrint(*str);
    }

    if (args.Length()==0)
        JsPrint();
}

void InterpreterV8::FuncAlarm(const Arguments& args)
{
    for (int i=0; i<args.Length(); i++)
    {
        const String::Utf8Value str(args[i]);
        if (*str)
            JsAlarm(*str);
    }

    if (args.Length()==0)
        JsAlarm();
}

void InterpreterV8::FuncOut(const Arguments& args)
{
    for (int i=0; i<args.Length(); i++)
    {
        const String::Utf8Value str(args[i]);
        if (*str)
            JsOut(*str);
    }
}

void InterpreterV8::FuncWarn(const Arguments& args)
{
    for (int i=0; i<args.Length(); i++)
    {
        const String::Utf8Value str(args[i]);
        if (*str)
            JsWarn(*str);
    }
}

// The callback that is invoked by v8 whenever the JavaScript 'load'
// function is called.  Loads, compiles and executes its argument
// JavaScript file.
void InterpreterV8::FuncInclude(const Arguments& args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()!=1)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Number of arguments must be one."));
        return;
    }
    if (!args[0]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument must be a string."));
        return;
    }

    const String::Utf8Value file(args[0]);
    if (*file == NULL)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "File name missing."));
        return;
    }

    if (strlen(*file)==0)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "File name empty."));
        return;
    }

    const auto path = boost::filesystem::path(*file);

    const auto f = path.is_absolute() ? path : boost::filesystem::path(fIncludePath)/path;

    izstream fin(*file);//f.string().c_str());
    if (!fin)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, errno!=0?strerror(errno):"Insufficient memory for decompression"));
        return;
    }

    string buffer;
    getline(fin, buffer, '\0');

    if ((fin.fail() && !fin.eof()) || fin.bad())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, strerror(errno)));
        return;
    }

    if (buffer.length()>1 && buffer[0]=='#' && buffer[1]=='!')
        buffer.insert(0, "//");

    args.GetReturnValue().Set(ExecuteCode(buffer, *file));
}

void InterpreterV8::FuncFile(const Arguments& args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()!=1 && args.Length()!=2)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Number of arguments must be one or two."));
        return;
    }

    const String::Utf8Value file(args[0]);
    if (*file == NULL)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "File name missing"));
        return;
    }

    if (args.Length()==2 && !args[1]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Second argument must be a string."));
        return;
    }

    const string delim = args.Length()==2 ? *String::Utf8Value(args[1]) : "";

    if (args.Length()==2 && delim.size()!=1)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Second argument must be a string of length 1."));
        return;
    }

    const HandleScope handle_scope(isolate);

    const auto path = boost::filesystem::path(*file);

    const auto f = path.is_absolute() ? path : boost::filesystem::path(fIncludePath)/path;

    izstream fin(*file);//f.string().c_str());
    if (!fin)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, errno!=0?strerror(errno):"Insufficient memory for decompression"));
        return;
    }

    if (args.Length()==1)
    {
        string buffer;
        getline(fin, buffer, '\0');
        if ((fin.fail() && !fin.eof()) || fin.bad())
        {
            isolate->ThrowException(String::NewFromUtf8(isolate, strerror(errno)));
            return;
        }

        Handle<Value> str = StringObject::New(String::NewFromUtf8(isolate, buffer.c_str()));
        StringObject::Cast(*str)->Set(String::NewFromUtf8(isolate, "name"), String::NewFromUtf8(isolate, *file));
        args.GetReturnValue().Set(str);
        return;
    }

    Handle<Array> arr = Array::New(isolate);
    if (arr.IsEmpty())
        return;

    int i=0;
    string buffer;
    while (getline(fin, buffer, delim[0]))
        arr->Set(i++, String::NewFromUtf8(isolate, buffer.c_str()));

    if ((fin.fail() && !fin.eof()) || fin.bad())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, strerror(errno)));
        return;
    }

    arr->Set(String::NewFromUtf8(isolate, "name"),  String::NewFromUtf8(isolate, *file));
    arr->Set(String::NewFromUtf8(isolate, "delim"), String::NewFromUtf8(isolate, delim.c_str(), NewStringType::kNormal, 1).ToLocalChecked());

    args.GetReturnValue().Set(arr);
}

// ==========================================================================
//                                 Mail
// ==========================================================================

void InterpreterV8::ConstructorMail(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (!args.IsConstructCall())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Mail must be called as constructor"));
        return;
    }

    if (args.Length()!=1 || !args[0]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Constructor must be called with a single string as argument"));
        return;
    }

    const HandleScope handle_scope(isolate);

    Handle<Array> rec = Array::New(isolate);
    Handle<Array> att = Array::New(isolate);
    Handle<Array> bcc = Array::New(isolate);
    Handle<Array> cc  = Array::New(isolate);
    Handle<Array> txt = Array::New(isolate);
    if (rec.IsEmpty() || att.IsEmpty() || bcc.IsEmpty() || cc.IsEmpty() || txt.IsEmpty())
        return;

    Handle<Object> self = args.This();

    self->Set(String::NewFromUtf8(isolate, "subject"),     args[0]->ToString()/*, ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "recipients"),  rec/*, ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "attachments"), att/*, ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "bcc"),         bcc/*, ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "cc"),          cc/*,  ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "text"),        txt/*, ReadOnly*/);

    self->Set(String::NewFromUtf8(isolate, "send"), FunctionTemplate::New(isolate, WrapSendMail)->GetFunction()/*, ReadOnly*/);

    args.GetReturnValue().Set(self);
}

vector<string> InterpreterV8::ValueToArray(const Handle<Value> &val, bool only)
{
    vector<string> rc;

    Handle<Array> arr = Handle<Array>::Cast(val);
    for (uint32_t i=0; i<arr->Length(); i++)
    {
        Handle<Value> obj = arr->Get(i);
        if (obj.IsEmpty())
            continue;

        if (obj->IsNull() || obj->IsUndefined())
            continue;

        if (only && !obj->IsString())
            continue;

        rc.push_back(*String::Utf8Value(obj->ToString()));
    }

    return rc;
}

void InterpreterV8::FuncSendMail(const Arguments& args)
{
    Isolate *isolate = Isolate::GetCurrent();

    const HandleScope handle_scope(isolate);

    if (args.Length()>1)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Only one argument allowed."));
        return;
    }

    if (args.Length()==1 && !args[0]->IsBoolean())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument must be a boolean."));
        return;
    }

    const bool block = args.Length()==0 || args[0]->BooleanValue();

    const Handle<Value> sub = args.This()->Get(String::NewFromUtf8(isolate, "subject"));
    const Handle<Value> rec = args.This()->Get(String::NewFromUtf8(isolate, "recipients"));
    const Handle<Value> txt = args.This()->Get(String::NewFromUtf8(isolate, "text"));
    const Handle<Value> att = args.This()->Get(String::NewFromUtf8(isolate, "attachments"));
    const Handle<Value> bcc = args.This()->Get(String::NewFromUtf8(isolate, "bcc"));
    const Handle<Value> cc  = args.This()->Get(String::NewFromUtf8(isolate, "cc"));

    const vector<string> vrec = ValueToArray(rec);
    const vector<string> vtxt = ValueToArray(txt, false);
    const vector<string> vatt = ValueToArray(att);
    const vector<string> vbcc = ValueToArray(bcc);
    const vector<string> vcc  = ValueToArray(cc);

    if (vrec.size()==0)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "At least one valid string is required in 'recipients'."));
        return;
    }
    if (vtxt.size()==0)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "At least one valid string is required in 'text'."));
        return;
    }

    const string subject = *String::Utf8Value(sub->ToString());

    FILE *pipe = popen(("from=no-reply@fact-project.org mailx -~ "+vrec[0]).c_str(), "w");
    if (!pipe)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, strerror(errno)));
        return;
    }


    fprintf(pipe, "%s", ("~s"+subject+"\n").c_str());
    for (auto it=vrec.begin()+1; it<vrec.end(); it++)
        fprintf(pipe, "%s", ("~t"+*it+"\n").c_str());
    for (auto it=vbcc.begin(); it<vbcc.end(); it++)
        fprintf(pipe, "%s", ("~b"+*it+"\n").c_str());
    for (auto it=vcc.begin(); it<vcc.end(); it++)
        fprintf(pipe, "%s", ("~c"+*it+"\n").c_str());
    for (auto it=vatt.begin(); it<vatt.end(); it++)
        fprintf(pipe, "%s", ("~@"+*it+"\n").c_str());  // Must not contain white spaces

    for (auto it=vtxt.begin(); it<vtxt.end(); it++)
        fwrite((*it+"\n").c_str(), it->length()+1, 1, pipe);

    fprintf(pipe, "\n---\nsent by dimctrl");

    if (!block)
        return;

    const int rc = pclose(pipe);

    const Locker lock(isolate);
    args.GetReturnValue().Set(WEXITSTATUS(rc));
}

// =========================================================================
//                                 Curl
// ==========================================================================

void InterpreterV8::ConstructorCurl(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (!args.IsConstructCall())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Curl must be called as constructor"));
        return;
    }

    if (args.Length()!=1 || !args[0]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Constructor must be called with a single string as argument"));
        return;
    }

    const HandleScope handle_scope(isolate);

    Handle<Array> data = Array::New(isolate);
    if (data.IsEmpty())
        return;

    Handle<Object> self = args.This();

    self->Set(String::NewFromUtf8(isolate, "url"),  args[0]->ToString()/*, ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "data"), data/*, ReadOnly*/);

    self->Set(String::NewFromUtf8(isolate, "send"), FunctionTemplate::New(isolate, WrapSendCurl)->GetFunction()/*, ReadOnly*/);

    args.GetReturnValue().Set(self);
}

void InterpreterV8::FuncSendCurl(const Arguments& args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()>1)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Only one argument allowed."));
        return;
    }

    if (args.Length()==1 && !args[0]->IsBoolean())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument must be a boolean."));
        return;
    }

    const HandleScope handle_scope(isolate);

    const bool block = args.Length()==0 || args[0]->BooleanValue();

    const Handle<Value> url  = args.This()->Get(String::NewFromUtf8(isolate, "url"));
    const Handle<Value> data = args.This()->Get(String::NewFromUtf8(isolate, "data"));

    const vector<string> vdata = ValueToArray(data);
    const string sdata = boost::algorithm::join(vdata, "&");

    const string surl = *String::Utf8Value(url->ToString());

    string cmd = "curl -sSf ";
    if (!sdata.empty())
        cmd += "--data '"+sdata+"' ";
    cmd += "'http://"+surl+"' 2>&1 ";

    FILE *pipe = popen(cmd.c_str(), "r");
    if (!pipe)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, strerror(errno)));
        return;
    }

    if (!block)
        return;

    string txt;

    while (!feof(pipe))
    {
        char buf[1025];
        if (fgets(buf, 1024, pipe)==NULL)
            break;
        txt += buf;
    }

    const int rc = pclose(pipe);

    Handle<Object> obj = Object::New(isolate);

    obj->Set(String::NewFromUtf8(isolate, "cmd"), String::NewFromUtf8(isolate, cmd.c_str()));
    obj->Set(String::NewFromUtf8(isolate, "data"), String::NewFromUtf8(isolate, txt.c_str()));
    obj->Set(String::NewFromUtf8(isolate, "rc"), Integer::NewFromUnsigned(isolate, WEXITSTATUS(rc)));

    const Locker lock(isolate);
    args.GetReturnValue().Set(obj);
}

// ==========================================================================
//                                 Database
// ==========================================================================

void InterpreterV8::FuncDbClose(const Arguments &args)
{
    Isolate* isolate = Isolate::GetCurrent();

    void *ptr = args.This()->GetInternalField(0).As<v8::External>()->Value();
    if (!ptr)
    {
        args.GetReturnValue().Set(false);
        return;
    }

#ifdef HAVE_SQL
    Database *db = reinterpret_cast<Database*>(ptr);
    auto it = find(fDatabases.begin(), fDatabases.end(), db);
    fDatabases.erase(it);
    delete db;
#endif

    const HandleScope handle_scope(isolate);

    args.This()->SetInternalField(0, External::New(isolate, 0));

    args.GetReturnValue().Set(true);
}

void InterpreterV8::FuncDbQuery(const Arguments &args)
{
    Isolate* isolate = Isolate::GetCurrent();

    if (args.Length()==0)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Arguments expected."));
        return;
    }

    void *ptr = args.This()->GetInternalField(0).As<v8::External>()->Value();
    if (!ptr)
        return;

    string query;
    for (int i=0; i<args.Length(); i++)
        query += string(" ") + *String::Utf8Value(args[i]);
    query.erase(0, 1);

#ifdef HAVE_SQL
    try
    {
        const HandleScope handle_scope(isolate);

        Database *db = reinterpret_cast<Database*>(ptr);

        const mysqlpp::StoreQueryResult res = db->query(query).store();

        Handle<Array> ret = Array::New(isolate);
        if (ret.IsEmpty())
            return;

        ret->Set(String::NewFromUtf8(isolate, "table"), String::NewFromUtf8(isolate, res.table())/*,   ReadOnly*/);
        ret->Set(String::NewFromUtf8(isolate, "query"), String::NewFromUtf8(isolate, query.c_str())/*, ReadOnly*/);

        Handle<Array> cols = Array::New(isolate);
        if (cols.IsEmpty())
            return;

        int irow=0;
        for (vector<mysqlpp::Row>::const_iterator it=res.begin(); it<res.end(); it++)
        {
            Handle<Object> row = Object::New(isolate);
            if (row.IsEmpty())
                return;

            const mysqlpp::FieldNames *list = it->field_list().list;

            for (size_t i=0; i<it->size(); i++)
            {
                const Handle<Value> name = String::NewFromUtf8(isolate, (*list)[i].c_str());
                if (irow==0)
                    cols->Set(i, name);

                if ((*it)[i].is_null())
                {
                    row->Set(name, Undefined(isolate)/*, ReadOnly*/);
                    continue;
                }

                const string sql_type = (*it)[i].type().sql_name();

                const bool uns = sql_type.find("UNSIGNED")==string::npos;

                if (sql_type.find("BIGINT")!=string::npos)
                {
                    if (uns)
                    {
                        const uint64_t val = (uint64_t)(*it)[i];
                        if (val>UINT32_MAX)
                            row->Set(name, Number::New(isolate, val)/*, ReadOnly*/);
                        else
                            row->Set(name, Integer::NewFromUnsigned(isolate, val)/*, ReadOnly*/);
                    }
                    else
                    {
                        const int64_t val = (int64_t)(*it)[i];
                        if (val<INT32_MIN || val>INT32_MAX)
                            row->Set(name, Number::New(isolate, val)/*, ReadOnly*/);
                        else
                            row->Set(name, Integer::NewFromUnsigned(isolate, val)/*, ReadOnly*/);
                    }
                    continue;
                }

                // 32 bit
                if (sql_type.find("INT")!=string::npos)
                {
                    if (uns)
                        row->Set(name, Integer::NewFromUnsigned(isolate, (uint32_t)(*it)[i])/*, ReadOnly*/);
                    else
                        row->Set(name, Integer::New(isolate, (int32_t)(*it)[i])/*, ReadOnly*/);
                    continue;
                }

                if (sql_type.find("BOOL")!=string::npos )
                {
                    row->Set(name, Boolean::New(isolate, (bool)(*it)[i])/*, ReadOnly*/);
                    continue;
                }

                if (sql_type.find("FLOAT")!=string::npos)
                {
                    ostringstream val;
                    val << setprecision(7) << (float)(*it)[i];
                    row->Set(name, Number::New(isolate, stod(val.str()))/*, ReadOnly*/);
                    continue;

                }
                if (sql_type.find("DOUBLE")!=string::npos)
                {
                    row->Set(name, Number::New(isolate, (double)(*it)[i])/*, ReadOnly*/);
                    continue;
                }

                if (sql_type.find("CHAR")!=string::npos ||
                    sql_type.find("TEXT")!=string::npos)
                {
                    row->Set(name, String::NewFromUtf8(isolate, (const char*)(*it)[i])/*, ReadOnly*/);
                    continue;
                }

                time_t date = 0;
                if (sql_type.find("TIMESTAMP")!=string::npos)
                    date = mysqlpp::Time((*it)[i]);

                if (sql_type.find("DATETIME")!=string::npos)
                    date = mysqlpp::DateTime((*it)[i]);

                if (sql_type.find(" DATE ")!=string::npos)
                    date = mysqlpp::Date((*it)[i]);

                if (date>0)
                {
                    // It is important to catch the exception thrown
                    // by Date::New in case of thread termination!
                    const Local<Value> val = Date::New(isolate, date*1000);
                    if (val.IsEmpty())
                        return;

                    row->Set(name, val/*, ReadOnly*/);
                }
            }

            ret->Set(irow++, row);
        }

        if (irow>0)
            ret->Set(String::NewFromUtf8(isolate, "cols"), cols/*, ReadOnly*/);

        args.GetReturnValue().Set(ret);
    }
    catch (const exception &e)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, e.what()));
    }
#endif
}

void InterpreterV8::FuncDatabase(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (!args.IsConstructCall())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Database must be called as constructor."));
        return;
    }

    if (args.Length()!=1)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Number of arguments must be 1."));
        return;
    }

    if (!args[0]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 1 not a string."));
        return;
    }

#ifdef HAVE_SQL
    try
    {
        const HandleScope handle_scope(isolate);

        // if (!args.IsConstructCall())
        //    return Constructor(fTemplateDatabase, args);

        Database *db = new Database(*String::Utf8Value(args[0]));
        fDatabases.push_back(db);

        Handle<Object> self = args.This();
        self->Set(String::NewFromUtf8(isolate, "user"),     String::NewFromUtf8(isolate, db->user.c_str())/*, ReadOnly*/);
        self->Set(String::NewFromUtf8(isolate, "server"),   String::NewFromUtf8(isolate, db->server.c_str())/*, ReadOnly*/);
        self->Set(String::NewFromUtf8(isolate, "database"), String::NewFromUtf8(isolate, db->db.c_str())/*, ReadOnly*/);
        if (db->port)
            self->Set(String::NewFromUtf8(isolate, "port"), Integer::NewFromUnsigned(isolate, db->port));
        self->Set(String::NewFromUtf8(isolate, "query"),    FunctionTemplate::New(isolate, WrapDbQuery)->GetFunction()/*, ReadOnly*/);
        self->Set(String::NewFromUtf8(isolate, "close"),    FunctionTemplate::New(isolate, WrapDbClose)->GetFunction()/*,   ReadOnly*/);
        self->SetInternalField(0, External::New(isolate, db));

        args.GetReturnValue().Set(self);
    }
    catch (const exception &e)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, e.what()));
    }
#endif
}

// ==========================================================================
//                                 Services
// ==========================================================================

Handle<Value> InterpreterV8::Convert(char type, const char* &ptr)
{
    Isolate *isolate = Isolate::GetCurrent();

    // Dim values are always unsigned per (FACT++) definition
    switch (type)
    {
    case 'F':
        {
            // Remove the "imprecision" effect coming from casting a float to
            // a double and then showing it with double precision
            ostringstream val;
            val << setprecision(7) << *reinterpret_cast<const float*>(ptr);
            ptr += 4;
            return Number::New(isolate, stod(val.str()));
        }
    case 'D':  { Handle<Value> v=Number::New(isolate, *reinterpret_cast<const double*>(ptr)); ptr+=8; return v; }
    case 'I':
    case 'L':  { Handle<Value> v=Integer::NewFromUnsigned(isolate, *reinterpret_cast<const uint32_t*>(ptr)); ptr += 4; return v; }
    case 'X':
        {
            const int64_t val = *reinterpret_cast<const int64_t*>(ptr);
            ptr += 8;
            if (val>=0 && val<=UINT32_MAX)
                return Integer::NewFromUnsigned(isolate, val);
            if (val>=INT32_MIN && val<0)
                return Integer::New(isolate, val);
            return Number::New(isolate, val);
        }
    case 'S':  { Handle<Value> v=Integer::NewFromUnsigned(isolate, *reinterpret_cast<const uint16_t*>(ptr)); ptr += 2; return v; }
    case 'C':  { Handle<Value> v=Integer::NewFromUnsigned(isolate, (uint16_t)*reinterpret_cast<const uint8_t*>(ptr));  ptr += 1; return v; }
    }
    return Undefined(isolate);
}

void InterpreterV8::FuncClose(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    const HandleScope handle_scope(isolate);

    //const void *ptr = Local<External>::Cast(args.Holder()->GetInternalField(0))->Value();

    const String::Utf8Value str(args.This()->Get(String::NewFromUtf8(isolate, "name")));

    const auto it = fReverseMap.find(*str);
    if (it!=fReverseMap.end())
        fReverseMap.erase(it);

    args.This()->Set(String::NewFromUtf8(isolate, "isOpen"), Boolean::New(isolate, false)/*, ReadOnly*/);

    args.GetReturnValue().Set(JsUnsubscribe(*str));
}

Handle<Value> InterpreterV8::ConvertEvent(const EventImp *evt, uint64_t counter, const char *str)
{
    Isolate *isolate = Isolate::GetCurrent();

    const vector<Description> vec = JsDescription(str);

    Local<Context> context = isolate->GetCurrentContext();
    MaybeLocal<Object> mret = fTemplateEvent->GetFunction()->NewInstance(context);
    if (mret.IsEmpty())
        return Undefined(isolate);

    const Local<Value> date = Date::New(isolate, evt->GetJavaDate());
    if (date.IsEmpty())
        return Undefined(isolate);

    Local<Object> ret = mret.ToLocalChecked();

    ret->Set(String::NewFromUtf8(isolate, "name"),    String::NewFromUtf8(isolate, str)/*,              ReadOnly*/);
    ret->Set(String::NewFromUtf8(isolate, "format"),  String::NewFromUtf8(isolate, evt->GetFormat().c_str())/*, ReadOnly*/);
    ret->Set(String::NewFromUtf8(isolate, "qos"),     Integer::New(isolate, evt->GetQoS())/*,   ReadOnly*/);
    ret->Set(String::NewFromUtf8(isolate, "size"),    Integer::New(isolate, evt->GetSize())/*,  ReadOnly*/);
    ret->Set(String::NewFromUtf8(isolate, "counter"), Integer::New(isolate, counter)/*,         ReadOnly*/);
    if (evt->GetJavaDate()>0)
        ret->Set(String::NewFromUtf8(isolate, "time"), date/*, ReadOnly*/);

    // If names are available data will also be provided as an
    // object. If an empty event was received, but names are available,
    // the object will be empty. Otherwise 'obj' will be undefined.
    // obj===undefined:               no data received
    // obj!==undefined, length==0:    names for event available
    // obj!==undefined, obj.length>0: names available, data received
    Handle<Object> named = Object::New(isolate);
    if (vec.size()>0)
        ret->Set(String::NewFromUtf8(isolate, "obj"), named/*, ReadOnly*/);

    // If no event was received (usually a disconnection event in
    // the context of FACT++), no data is returned
    if (evt->IsEmpty())
        return ret;

    // If valid data was received, but the size was zero, then
    // null is returned as data
    // data===undefined: no data received
    // data===null:      event received, but no data
    // data.length>0:    event received, contains data
    if (evt->GetSize()==0 || evt->GetFormat().empty())
    {
        ret->Set(String::NewFromUtf8(isolate, "data"), Null(isolate)/*, ReadOnly*/);
        return ret;
    }

    // It seems a copy is required either in the boost which comes with
    // Ubuntu 16.04 or in gcc5 ?!
    const string fmt = evt->GetFormat();

    typedef boost::char_separator<char> separator;
    const boost::tokenizer<separator> tokenizer(fmt, separator(";:"));

    const vector<string> tok(tokenizer.begin(), tokenizer.end());

    //Handle<Object> arr = tok.size()>1 ? Array::New(isolate) : ret;

    Handle<Object> arr;
    if (tok.size()>1)
        arr = Array::New(isolate);
    else
        arr = ret;

    if (arr.IsEmpty())
        return Undefined(isolate);

    const char *ptr = evt->GetText();
    const char *end = evt->GetText()+evt->GetSize();

    try
    {
        size_t pos = 1;
        for (auto it=tok.begin(); it<tok.end() && ptr<end; it++, pos++)
        {
            char type = (*it)[0];
            it++;

            string name = pos<vec.size() ? vec[pos].name : "";
            if (tok.size()==1)
                name = "data";

            // Get element size
            uint32_t sz = 1;
            switch (type)
            {
            case 'X':
            case 'D': sz = 8; break;
            case 'F':
            case 'I':
            case 'L': sz = 4; break;
            case 'S': sz = 2; break;
            case 'C': sz = 1; break;
            }

            // Check if no number is attached if the size of the
            // received data is consistent with the format string
            if (it==tok.end() && (end-ptr)%sz>0)
                return Exception::Error(String::NewFromUtf8(isolate, ("Number of received bytes ["+to_string(evt->GetSize())+"] does not match format ["+evt->GetFormat()+"]").c_str()));

            // Check if format has a number attached.
            // If no number is attached calculate number of elements
            const uint32_t cnt = it==tok.end() ? (end-ptr)/sz : stoi(it->c_str());

            // is_str: Array of type C but unknown size (String)
            // is_one: Array of known size, but size is 1 (I:1)
            const bool is_str = type=='C' && it==tok.end();
            const bool is_one = cnt==1    && it!=tok.end();

            Handle<Value> v;

            if (is_str)
                v = String::NewFromUtf8(isolate, ptr);
            if (is_one)
                v = Convert(type, ptr);

            // Array of known (I:5) or unknown size (I), but no string
            if (!is_str && !is_one)
            {
                Handle<Object> a = Array::New(isolate, cnt);
                if (a.IsEmpty())
                    return Undefined(isolate);

                for (uint32_t i=0; i<cnt; i++)
                    a->Set(i, Convert(type, ptr));

                v = a;
            }

            if (tok.size()>1)
                arr->Set(pos-1, v);
            else
                ret->Set(String::NewFromUtf8(isolate, "data"), v/*, ReadOnly*/);

            if (!name.empty())
            {
                const Handle<String> n = String::NewFromUtf8(isolate, name.c_str());
                named->Set(n, v);
            }
        }

        if (tok.size()>1)
            ret->Set(String::NewFromUtf8(isolate, "data"), arr/*, ReadOnly*/);

        return ret;
    }
    catch (...)
    {
        return Exception::Error(String::NewFromUtf8(isolate, ("Format string conversion '"+evt->GetFormat()+"' failed.").c_str()));
    }
}
/*
Handle<Value> InterpreterV8::FuncGetData(const Arguments &args)
{
    HandleScope handle_scope;

    const String::Utf8Value str(args.Holder()->Get(String::NewFromUtf8(isolate, "name")));

    const pair<uint64_t, EventImp *> p = JsGetEvent(*str);

    const EventImp *evt = p.second;
    if (!evt)
        return Undefined(isolate);

    //if (counter==cnt)
    //    return info.Holder();//Holder()->Get(String::NewFromUtf8(isolate, "data"));

    Handle<Value> ret = ConvertEvent(evt, p.first, *str);
    return ret->IsNativeError() ? isolate->ThrowException(ret) : handle_scope.Escape(ret);
}
*/
void InterpreterV8::FuncGetData(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()>2)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Number of arguments must not be greater than 2."));
        return;
    }

    if (args.Length()>=1 && !args[0]->IsInt32() && !args[0]->IsNull())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 1 not an uint32."));
        return;
    }

    if (args.Length()==2 && !args[1]->IsBoolean())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 2 not a boolean."));
        return;
    }

    // Using a Javascript function has the advantage that it is fully
    // interruptable without the need of C++ code
    const bool    null    = args.Length()>=1 && args[0]->IsNull();
    const int32_t timeout = args.Length()>=1 ? args[0]->Int32Value() : 0;
    const bool    named   = args.Length()<2 || args[1]->BooleanValue();

    const HandleScope handle_scope(isolate);

    const Handle<String> data   = String::NewFromUtf8(isolate, "data");
    const Handle<String> object = String::NewFromUtf8(isolate, "obj");

    const String::Utf8Value name(args.Holder()->Get(String::NewFromUtf8(isolate, "name")));

    TryCatch exception(isolate);

    Time t;
    while (!exception.HasCaught())
    {
        const pair<uint64_t, EventImp *> p = JsGetEvent(*name);

        const EventImp *evt = p.second;
        if (evt)
        {
            const Handle<Value> val = ConvertEvent(evt, p.first, *name);
            if (val->IsNativeError())
            {
                isolate->ThrowException(val);
                return;
            }


            // Protect against the return of an exception
            if (val->IsObject())
            {
                const Handle<Object> event = val->ToObject();
                const Handle<Value>  obj   = event->Get(named?object:data);
                if (!obj.IsEmpty())
                {
                    if (!named)
                    {
                        // No names (no 'obj'), but 'data'
                        if (!obj->IsUndefined())
                        {
                            args.GetReturnValue().Set(val);
                            return;
                        }
                    }
                    else
                    {
                        // Has names and data was received?
                        if (obj->IsObject() && obj->ToObject()->GetOwnPropertyNames()->Length()>0)
                        {
                            args.GetReturnValue().Set(val);
                            return;
                        }
                    }
                }
            }
        }

        if (args.Length()==0)
            break;

        if (!null && Time()-t>=boost::posix_time::milliseconds(abs(timeout)))
            break;

        // Theoretically, the CPU usage can be reduced by maybe a factor
        // of four using a larger value, but this also means that the
        // JavaScript is locked for a longer time.
        const Unlocker unlock(isolate);
        usleep(1000);
    }

    // This hides the location of the exception, which is wanted.
    if (exception.HasCaught())
    {
        exception.ReThrow();
        return;
    }

    if (timeout<0)
        return;

    const string str = "Waiting for a valid event of "+string(*name)+" timed out.";
    isolate->ThrowException(String::NewFromUtf8(isolate, str.c_str()));
}

void InterpreterV8::TerminateExecution(Isolate* isolate)
{
    // This makes all threads/contexts sooner or later terminate
    isolate->TerminateExecution();
}

// This is a callback from the RemoteControl piping event handling
// to the java script ---> in test phase!
void InterpreterV8::JsHandleEvent(const EventImp &evt, uint64_t cnt, const string &service)
{
    // FIXME: This is not thread safe!
    // This is copied as fMainThread=0 is used to signal
    // that no execution should take place anymore
    Isolate *isolate = fMainThread;
    if (!isolate)
        return;

    //{

    // We want to run as an interrupt in the main thread
    const Locker locker(isolate);
    if (!fMainThread)
        return;

    const Isolate::Scope isolate_scope(isolate);
    const HandleScope handle_scope(isolate);

    const auto it = fReverseMap.find(service);
    if (it==fReverseMap.end())
        return;

    Handle<Object> fun = it->second.Get(isolate);
    const Context::Scope scope(fun->CreationContext());

    const Handle<String> onchange = String::NewFromUtf8(isolate, "onchange");
    if (!fun->Has(onchange))
        return;

    const Handle<Value> val = fun->Get(onchange);
    if (!val->IsFunction())
        return;

    TryCatch exception(isolate);

    Handle<Value> ret = ConvertEvent(&evt, cnt, service.c_str());
    if (ret->IsObject())
        Handle<Function>::Cast(val)->Call(fun->CreationContext(), fun, 1, &ret).IsEmpty();

    if (!HandleException(exception, "Service.onchange"))
        isolate->AddBeforeCallEnteredCallback(TerminateExecution);

    if (ret->IsNativeError())
    {
        JsException(service+".onchange callback - "+*String::Utf8Value(ret));
        isolate->AddBeforeCallEnteredCallback(TerminateExecution);
    }

    // isolate->DiscardThreadSpecificMetadata();

/*
    // The Isolation context isolates (keeps local) interrupts and termination requests!
    // Terminating execution doesn't work while the JS is still runnning in this script
    if (term)
    {
        // There is no point in calling TerminateExecution before (after releasing
        // the lock) the scheduler has entered the main thread again, as the
        // TerminateExecution would just be lost.
        const Unlocker unlock(isolate);
        for (int i=0; i<10 && !fMainThread->InContext(); i++)
            usleep(50);
        isolate->TerminateExecution();
    }
*/
}

void InterpreterV8::OnChangeSet(Local<Name> name, Local<Value> value, const PropertyCallbackInfo<Value> &)
{
    Isolate *isolate = Isolate::GetCurrent();

    // Returns the value if the setter intercepts the request.
    // Otherwise, returns an empty handle.
    const string server = *String::Utf8Value(name);
    auto it = fStateCallbacks.find(server);

    if (it!=fStateCallbacks.end())
        fStateCallbacks.erase(it);

    if (value->IsFunction())
        fStateCallbacks[server] = PersistentCopy<Object>(isolate, value->ToObject());
}

void InterpreterV8::JsHandleState(const std::string &server, const State &state)
{
    // FIXME: This is not thread safe!
    // This is copied as fMainThread=0 is used to signal
    // that no execution should take place anymore
    Isolate *isolate = fMainThread;
    if (!isolate)
        return;

    //{

    // We want to run as an interrupt in the main thread
    const Locker locker(isolate);
    if (!fMainThread)
        return;

    const Isolate::Scope isolate_scope(isolate);
    const HandleScope handle_scope(isolate);


    auto it = fStateCallbacks.find(server);
    if (it==fStateCallbacks.end())
    {
        it = fStateCallbacks.find("*");
        if (it==fStateCallbacks.end())
            return;
    }

    Handle<Object> fun = it->second.Get(isolate);
    const Context::Scope scope(fun->CreationContext());

    // -------------------------------------------------------------------

    Handle<ObjectTemplate> obj = ObjectTemplate::New(isolate);
    obj->Set(String::NewFromUtf8(isolate, "server"),  String::NewFromUtf8(isolate, server.c_str()), ReadOnly);

    if (state.index>-256)
    {
        obj->Set(String::NewFromUtf8(isolate, "index"),   Integer::New(isolate, state.index),                  ReadOnly);
        obj->Set(String::NewFromUtf8(isolate, "name"),    String::NewFromUtf8(isolate, state.name.c_str()),    ReadOnly);
        obj->Set(String::NewFromUtf8(isolate, "comment"), String::NewFromUtf8(isolate, state.comment.c_str()), ReadOnly);

         MaybeLocal<Value> date = Date::New(isolate->GetCurrentContext(), state.time.JavaDate());
         if (!date.IsEmpty())
         {
             obj->Set(String::NewFromUtf8(isolate, "time"), date.ToLocalChecked()->ToString(), ReadOnly);

             // This crahshes when called a secont time. I don't know why.
             // obj->Set(String::NewFromUtf8(isolate, "time"), date.ToLocalChecked(), ReadOnly);
         }
    }

    // -------------------------------------------------------------------

    TryCatch exception(isolate);

    Handle<Value> args[] = { obj->NewInstance() };
    Handle<Function>::Cast(fun)->Call(fun->CreationContext(), fun, 1, args).IsEmpty();

    if (!HandleException(exception, "dim.onchange"))
        isolate->AddBeforeCallEnteredCallback(TerminateExecution);

    // isolate->DiscardThreadSpecificMetadata();
}

// ==========================================================================
//                           Interrupt handling
// ==========================================================================

void InterpreterV8::FuncSetInterrupt(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()!=1)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Number of arguments must be 1."));
        return;
    }

    if (!args[0]->IsNull() && !args[0]->IsUndefined() && !args[0]->IsFunction())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument not a function, null or undefined."));
        return;
    }

    if (args[0]->IsNull() || args[0]->IsUndefined())
    {
        fInterruptCallback.Reset();
        return;
    }

    // Returns the value if the setter intercepts the request. Otherwise, returns an empty handle.
    fInterruptCallback = PersistentCopy<Object>(isolate, args[0]->ToObject());
}

Handle<Value> InterpreterV8::HandleInterruptImp(string str, uint64_t time)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (fInterruptCallback.IsEmpty())
        return Handle<Value>();

    const size_t p = str.find_last_of('\n');

    const string usr = p==string::npos?"":str.substr(p+1);

    string irq = p==string::npos?str:str.substr(0, p);

    map<string,string> data;
    try
    {
        data = Tools::Split(irq, true);
    }
    catch (const exception &e)
    {
        irq = "ERROR";
        data["0"] = e.what();
        JsWarn("Couldn't parse interrupt: "+irq+" ["+string(e.what())+"]");
    }

    Local<Value>  irq_str = String::NewFromUtf8(isolate, irq.c_str());
    Local<Value>  usr_str = String::NewFromUtf8(isolate, usr.c_str());
    Local<Value>  date    = Date::New(isolate, time);
    Handle<Object> arr    = Array::New(isolate, data.size());

    if (date.IsEmpty() || arr.IsEmpty())
        return Handle<Value>();

    for (auto it=data.begin(); it!=data.end(); it++)
        arr->Set(String::NewFromUtf8(isolate, it->first.c_str()), String::NewFromUtf8(isolate, it->second.c_str()));

    Handle<Value> args[] = { irq_str, arr, date, usr_str };

    Handle<Object> fun = fInterruptCallback.Get(isolate);
    //const Context::Scope scope(obj->CreationContext());

    MaybeLocal<Value> ret = Handle<Function>::Cast(fun)->Call(fun->CreationContext(), fun, 4, args);
    return ret.IsEmpty() ? Handle<Value>() : ret.ToLocalChecked();
}

int InterpreterV8::JsHandleInterrupt(const EventImp &evt)
{
    // FIXME: This is not thread safe!
    // This is copied as fMainThread=0 is used to signal
    // that no execution should take place anymore
    Isolate *isolate = fMainThread;
    if (!isolate)
        return -42;

    //{

    // We want to run as an interrupt in the main thread
    const Locker locker(isolate);
    if (!fMainThread)
        return -42;

    const Isolate::Scope isolate_scope(isolate);
    const HandleScope handle_scope(isolate);

    if (fInterruptCallback.IsEmpty())
        return -42;

    Handle<Object> fun = fInterruptCallback.Get(isolate);
    const Context::Scope scope(fun->CreationContext());

    // -------------------------------------------------------------------

    TryCatch exception(isolate);

    const Handle<Value> val = HandleInterruptImp(evt.GetString(), evt.GetJavaDate());

    const int rc = !val.IsEmpty() && val->IsInt32() ? val->Int32Value() : 0;

    if (!HandleException(exception, "interrupt"))
        isolate->AddBeforeCallEnteredCallback(TerminateExecution);

    return rc<10 || rc>255 ? -42 : rc;
}

void InterpreterV8::FuncTriggerInterrupt(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    string data;
    for (int i=0; i<args.Length(); i++)
    {
        const String::Utf8Value str(args[i]);

        if (string(*str).find_first_of('\n')!=string::npos)
        {
            isolate->ThrowException(String::NewFromUtf8(isolate, "No argument must contain line breaks."));
            return;
        }

        if (!*str)
            continue;

        data += *str;
        data += ' ';
    }

    const HandleScope handle_scope(isolate);

    const Handle<Value> rc = HandleInterruptImp(Tools::Trim(data), Time().JavaDate());
    args.GetReturnValue().Set(rc);
}

// ==========================================================================
//                           Class 'Subscription'
// ==========================================================================

void InterpreterV8::FuncSubscription(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()!=1 && args.Length()!=2)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Number of arguments must be one or two."));
        return;
    }

    if (!args[0]->IsString())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 1 must be a string."));
        return;
    }

    if (args.Length()==2 && !args[1]->IsFunction())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Argument 2 must be a function."));
        return;
    }

    const String::Utf8Value str(args[0]);

    if (!args.IsConstructCall())
    {
        const auto it = fReverseMap.find(*str);
        if (it!=fReverseMap.end())
            args.GetReturnValue().Set(it->second.Get(isolate)/*Local<Object>::New(isolate, it->second)*/);

        return;
    }

    const HandleScope handle_scope(isolate);

    Handle<Object> self = args.This();
    self->Set(String::NewFromUtf8(isolate, "get"),    FunctionTemplate::New(isolate, WrapGetData)->GetFunction()/*,  ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "close"),  FunctionTemplate::New(isolate, WrapClose)->GetFunction()/*,    ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "name"),   String::NewFromUtf8(isolate, *str)/*, ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "isOpen"), Boolean::New(isolate, true));

    if (args.Length()==2)
        self->Set(String::NewFromUtf8(isolate, "onchange"), args[1]);

    fReverseMap[*str] = PersistentCopy<Object>(isolate, self);

    void *ptr = JsSubscribe(*str);
    if (ptr==0)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, ("Subscription to '"+string(*str)+"' already exists.").c_str()));
        return;
    }

    self->SetInternalField(0, External::New(isolate, ptr));

    // Persistent<Object> p = Persistent<Object>::New(obj->NewInstance());
    // obj.MakeWeak((void*)1, Cleanup);
    // return obj;
}

// ==========================================================================
//                            Astrometry
// ==========================================================================
#ifdef HAVE_NOVA

double InterpreterV8::GetDataMember(const Arguments &args, const char *name)
{
    Isolate *isolate = Isolate::GetCurrent();
    return args.This()->Get(String::NewFromUtf8(isolate, name))->NumberValue();
}

void InterpreterV8::CalcDist(const Arguments &args, const bool local)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()!=2)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "dist must be called with exactly two arguments."));
        return;
    }

    if (!args[0]->IsObject() || !args[1]->IsObject())
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "At least one argument not an object."));
        return;
    }

    // FiXME: Add a check for the argument type

    const HandleScope handle_scope(isolate);

    Handle<Object> obj[2] =
    {
        Handle<Object>::Cast(args[0]),
        Handle<Object>::Cast(args[1])
    };

    const Handle<String> s_theta = String::NewFromUtf8(isolate, local?"zd":"dec"); // was: zd
    const Handle<String> s_phi   = String::NewFromUtf8(isolate, local?"az":"ra");  // was: az

    const double conv_t = M_PI/180;
    const double conv_p = local ? -M_PI/180 : M_PI/12;
    const double offset = local ? 0 : M_PI;

    const double theta0 = offset - obj[0]->Get(s_theta)->NumberValue() * conv_t;
    const double phi0   =          obj[0]->Get(s_phi  )->NumberValue() * conv_p;
    const double theta1 = offset - obj[1]->Get(s_theta)->NumberValue() * conv_t;
    const double phi1   =          obj[1]->Get(s_phi  )->NumberValue() * conv_p;

    if (!finite(theta0) || !finite(theta1) || !finite(phi0) || !finite(phi1))
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "some values not valid or not finite."));
        return;
    }

    /*
    const double x0 = sin(zd0) * cos(az0);   // az0 -= az0
    const double y0 = sin(zd0) * sin(az0);   // az0 -= az0
    const double z0 = cos(zd0);

    const double x1 = sin(zd1) * cos(az1);   // az1 -= az0
    const double y1 = sin(zd1) * sin(az1);   // az1 -= az0
    const double z1 = cos(zd1);

    const double res = acos(x0*x1 + y0*y1 + z0*z1) * 180/M_PI;
    */

    // cos(az1-az0) = cos(az1)*cos(az0) + sin(az1)*sin(az0)

    const double x = sin(theta0) * sin(theta1) * cos(phi1-phi0);
    const double y = cos(theta0) * cos(theta1);

    const double res = acos(x + y) * 180/M_PI;

    args.GetReturnValue().Set(res);
}

void InterpreterV8::LocalDist(const Arguments &args)
{
    CalcDist(args, true);
}

void InterpreterV8::SkyDist(const Arguments &args)
{
    CalcDist(args, false);
}

void InterpreterV8::MoonDisk(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()>1)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "disk must not be called with more than one argument."));
        return;
    }

    const uint64_t v = uint64_t(args[0]->NumberValue());
    const Time utc = args.Length()==0 ? Time() : Time(v/1000, v%1000);

    args.GetReturnValue().Set(Nova::GetLunarDisk(utc.JD()));
}

struct AstroArgs
{
    string obs;
    Nova::LnLatPosn posn;
    double jd;
    uint64_t jsdate;

    AstroArgs() : jsdate(0) { }
};

AstroArgs EvalAstroArgs(int offset, const Arguments &args, int8_t type=2)
{
    const uint8_t max = abs(type);

    if (args.Length()>offset+max)
        throw runtime_error("Number of arguments must not exceed "+to_string(offset+max)+".");

    if (type==1  && args.Length()==offset+1 && !args[offset]->IsString())
        throw runtime_error("Argument "+to_string(offset+1)+" must be a string.");
    if (type==-1 && args.Length()==offset+1 && !args[offset]->IsDate())
        throw runtime_error("Argument "+to_string(offset+1)+" must be a date.");

    if (args.Length()==offset+1 && !(args[offset]->IsDate() || args[offset]->IsString()))
        throw runtime_error("Argument "+to_string(offset+1)+" must be a string or Date.");

    if (args.Length()==offset+2 &&
        !(args[offset+0]->IsDate() && args[offset+1]->IsString()) &&
        !(args[offset+1]->IsDate() && args[offset+0]->IsString()))
        throw runtime_error("Arguments "+to_string(offset+1)+" and "+to_string(offset+2)+" must be a string/Date or Date/string.");

    Isolate *isolate = Isolate::GetCurrent();

    const HandleScope handle_scope(isolate);

    Local<Value> obs = args.This()->Get(String::NewFromUtf8(isolate, "observatory"));
    if (args.Length()>offset && args[offset]->IsString())
        obs = args[offset];
    if (args.Length()>offset+1 && args[offset+1]->IsString())
        obs = args[offset+1];

    AstroArgs rc;

    // For constructors, observatory can stay empty if not explicitly given
    if (offset<2)
        rc.obs = Nova::LnLatPosn::preset();

    if (!obs.IsEmpty() && !obs->IsUndefined())
        rc.obs = *String::Utf8Value(obs);

    rc.posn = rc.obs;

    if ((!rc.obs.empty() || offset==0) && !rc.posn.isValid())
        throw runtime_error("Observatory "+rc.obs+" unknown.");

    Local<Value> date = args.This()->Get(String::NewFromUtf8(isolate, "time"));
    if (args.Length()>offset && args[offset]->IsDate())
        date = args[offset];
    if (args.Length()>offset+1 && args[offset+1]->IsDate())
        date = args[offset+1];

    // For constructors, time can stay empty if not explicitly given
    if (offset<2)
        rc.jsdate = Time().JavaDate();

    if (!date.IsEmpty() && !date->IsUndefined())
        rc.jsdate = uint64_t(date->NumberValue());

    rc.jd = Time(rc.jsdate/1000, rc.jsdate%1000).JD();

    return rc;
}

void InterpreterV8::LocalToSky(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    AstroArgs local;
    try
    {
        local = EvalAstroArgs(0, args, 2);
    }
    catch (const exception &e)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, e.what()));
        return;
    }

    Nova::ZdAzPosn hrz;
    hrz.zd = GetDataMember(args, "zd");
    hrz.az = GetDataMember(args, "az");

    if (!finite(hrz.zd) || !finite(hrz.az))
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Zd and az must be finite."));
        return;
    }

    const Nova::EquPosn equ = Nova::GetEquFromHrz(hrz, local.posn, local.jd);

    const HandleScope handle_scope(isolate);

    Local<Context> context = isolate->GetCurrentContext();

    Handle<Value> arg_loc[] = { Number::New(isolate, hrz.zd), Number::New(isolate, hrz.az), String::NewFromUtf8(isolate, local.obs.c_str()), Date::New(isolate, local.jsdate) };
    MaybeLocal<Object> loc = fTemplateLocal->GetFunction()->NewInstance(context, 4, arg_loc);

    Handle<Value> arg_sky[] = { Number::New(isolate, equ.ra/15), Number::New(isolate, equ.dec), loc.ToLocalChecked() };
    args.GetReturnValue().Set(fTemplateSky->GetFunction()->NewInstance(context, 3, arg_sky).ToLocalChecked());
}

void InterpreterV8::SkyToLocal(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    AstroArgs local;
    try
    {
        local = EvalAstroArgs(0, args, 2);
    }
    catch (const exception &e)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, e.what()));
        return;
    }

    Nova::EquPosn equ;
    equ.ra  = GetDataMember(args, "ra")*15;
    equ.dec = GetDataMember(args, "dec");

    if (!finite(equ.ra) || !finite(equ.dec))
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Ra and dec must be finite."));
        return;
    }

    const HandleScope handle_scope(isolate);

    Local<Context> context = isolate->GetCurrentContext();

    const Nova::ZdAzPosn hrz = Nova::GetHrzFromEqu(equ, local.posn, local.jd);

    Handle<Value> arg[] = { Number::New(isolate, hrz.zd), Number::New(isolate, hrz.az), String::NewFromUtf8(isolate, local.obs.c_str()), Date::New(isolate, local.jsdate) };
    args.GetReturnValue().Set(fTemplateLocal->GetFunction()->NewInstance(context, 4, arg).ToLocalChecked());
}

void InterpreterV8::MoonToLocal(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    AstroArgs local;
    try
    {
        local = EvalAstroArgs(0, args, 1);
    }
    catch (const exception &e)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, e.what()));
        return;
    }

    Nova::EquPosn equ;
    equ.ra  = GetDataMember(args, "ra")*15;
    equ.dec = GetDataMember(args, "dec");

    if (!finite(equ.ra) || !finite(equ.dec))
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Ra and dec must be finite."));
        return;
    }

    const HandleScope handle_scope(isolate);

    Local<Context> context = isolate->GetCurrentContext();

    const Nova::ZdAzPosn hrz = Nova::GetHrzFromEqu(equ, local.posn, local.jd);

    Handle<Value> arg[] = { Number::New(isolate, hrz.zd), Number::New(isolate, hrz.az), String::NewFromUtf8(isolate, local.obs.c_str()), Date::New(isolate, local.jsdate) };
    args.GetReturnValue().Set(fTemplateLocal->GetFunction()->NewInstance(context, 4, arg).ToLocalChecked());
}

void InterpreterV8::ConstructorMoon(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    AstroArgs local;
    try
    {
        local = EvalAstroArgs(0, args, -1);
    }
    catch (const exception &e)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, e.what()));
        return;
    }

    const Nova::EquPosn equ = Nova::GetLunarEquCoords(local.jd, 0.01);

    const HandleScope handle_scope(isolate);

    // ----------------------------

    if (!args.IsConstructCall())
    {
        args.GetReturnValue().Set(Constructor(args));
        return;
    }

    Handle<Function> function =
        FunctionTemplate::New(isolate, MoonToLocal)->GetFunction();
    if (function.IsEmpty())
        return;

    Handle<Object> self = args.This();
    self->Set(String::NewFromUtf8(isolate, "ra"),      Number::New(isolate, equ.ra/15)/*,  ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "dec"),     Number::New(isolate, equ.dec)/*,    ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "toLocal"), function/*,                ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "time"),    Date::New(isolate, local.jsdate)/*, ReadOnly*/);

    args.GetReturnValue().Set(self);
}

void InterpreterV8::ConstructorSky(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    if (args.Length()<2 || args.Length()>3)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "Sky constructor takes two or three arguments."));
        return;
    }

    if (args.Length()>2 && !args[2]->IsObject())
    {
        const string n = *String::Utf8Value(args[2]->ToObject()->GetConstructorName());
        if (n!="Local")
        {
            isolate->ThrowException(String::NewFromUtf8(isolate, "Third argument must be of type Local."));
            return;
        }
    }

    const double ra  = args[0]->NumberValue();
    const double dec = args[1]->NumberValue();

    if (!finite(ra) || !finite(dec))
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "The first two arguments to Sky must be valid numbers."));
        return;
    }


    // ----------------------------

    const HandleScope handle_scope(isolate);

    if (!args.IsConstructCall())
    {
        args.GetReturnValue().Set(Constructor(args));
        return;
    }

    Handle<Function> function =
        FunctionTemplate::New(isolate, SkyToLocal)->GetFunction();
    if (function.IsEmpty())
        return;

    Handle<Object> self = args.This();
    self->Set(String::NewFromUtf8(isolate, "ra"),      Number::New(isolate, ra)/*,  ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "dec"),     Number::New(isolate, dec)/*, ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "toLocal"), function/*,         ReadOnly*/);
    if (args.Length()==3)
        self->Set(String::NewFromUtf8(isolate, "local"), args[2]/*, ReadOnly*/);

    args.GetReturnValue().Set(self);
}

void InterpreterV8::ConstructorLocal(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    AstroArgs local;
    try
    {
        local = EvalAstroArgs(2, args, 2);
    }
    catch (const exception &e)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, e.what()));
        return;
    }

    const double zd = args[0]->NumberValue();
    const double az = args[1]->NumberValue();

    if (!finite(zd) || !finite(az))
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "The first two arguments to Local must be valid numbers."));
        return;
    }

    // --------------------

    const HandleScope handle_scope(isolate);

    if (!args.IsConstructCall())
    {
        args.GetReturnValue().Set(Constructor(args));
        return;
    }

    Handle<Function> function = FunctionTemplate::New(isolate, LocalToSky)->GetFunction();
    if (function.IsEmpty())
        return;

    Handle<Object> self = args.This();
    self->Set(String::NewFromUtf8(isolate, "zd"),    Number::New(isolate, zd)/*, ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "az"),    Number::New(isolate, az)/*, ReadOnly*/);
    self->Set(String::NewFromUtf8(isolate, "toSky"), function/*,        ReadOnly*/);
    if (!local.obs.empty())
        self->Set(String::NewFromUtf8(isolate, "observatory"), String::NewFromUtf8(isolate, local.obs.c_str())/*, ReadOnly*/);
    if (local.jsdate>0)
        self->Set(String::NewFromUtf8(isolate, "time"),  Date::New(isolate, local.jsdate)/*, ReadOnly*/);

    args.GetReturnValue().Set(self);
}

Handle<Object> ConstructRiseSet(const AstroArgs &args, const Nova::RstTime &rst, const bool &rc)
{
    Isolate *isolate = Isolate::GetCurrent();

    Handle<Object> obj = Object::New(isolate);
    obj->Set(String::NewFromUtf8(isolate, "time"), Date::New(isolate, args.jsdate)/*, ReadOnly*/);
    obj->Set(String::NewFromUtf8(isolate, "observatory"), String::NewFromUtf8(isolate, args.obs.c_str())/*, ReadOnly*/);

    const bool isUp = 
        (rst.rise<rst.set && (args.jd>rst.rise && args.jd<rst.set)) ||
        (rst.rise>rst.set && (args.jd<rst.set  || args.jd>rst.rise));

    obj->Set(String::NewFromUtf8(isolate, "isUp"), Boolean::New(isolate, isUp)/*, ReadOnly*/);

    if (!rc) // circumpolar
        return obj;

    Handle<Value> rise  = Date::New(isolate, Time(rst.rise).JavaDate());
    Handle<Value> set   = Date::New(isolate, Time(rst.set).JavaDate());
    Handle<Value> trans = Date::New(isolate, Time(rst.transit).JavaDate());
    if (rise.IsEmpty() || set.IsEmpty() || trans.IsEmpty())
        return Handle<Object>();

    obj->Set(String::NewFromUtf8(isolate, "rise"), rise/*, ReadOnly*/);
    obj->Set(String::NewFromUtf8(isolate, "set"), set/*, ReadOnly*/);
    obj->Set(String::NewFromUtf8(isolate, "transit"), trans/*, ReadOnly*/);

    return obj;
}

void InterpreterV8::SunHorizon(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    AstroArgs local;
    try
    {
        local = EvalAstroArgs(1, args, 2);
    }
    catch (const exception &e)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, e.what()));
        return;
    }

    const HandleScope handle_scope(isolate);

    double hrz = NAN;
    if (args.Length()==0 || args[0]->IsNull())
        hrz = LN_SOLAR_STANDART_HORIZON;
    if (args.Length()>0 && args[0]->IsNumber())
        hrz = args[0]->NumberValue();
    if (args.Length()>0 && args[0]->IsString())
    {
        string arg(Tools::Trim(*String::Utf8Value(args[0])));
        transform(arg.begin(), arg.end(), arg.begin(), ::tolower);

        if (arg==string("horizon").substr(0, arg.length()))
            hrz = LN_SOLAR_STANDART_HORIZON;
        if (arg==string("civil").substr(0, arg.length()))
            hrz = LN_SOLAR_CIVIL_HORIZON;
        if (arg==string("nautical").substr(0, arg.length()))
            hrz = LN_SOLAR_NAUTIC_HORIZON;
        if (arg==string("fact").substr(0, arg.length()))
            hrz = -13;
        if (arg==string("astronomical").substr(0, arg.length()))
            hrz = LN_SOLAR_ASTRONOMICAL_HORIZON;
    }

    if (!finite(hrz))
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, "First argument did not yield a valid number."));
        return;
    }

    ln_rst_time sun;
    const bool rc = ln_get_solar_rst_horizon(local.jd-0.5, &local.posn, hrz, &sun)==0;
    Handle<Object> rst = ConstructRiseSet(local, sun, rc);
    rst->Set(String::NewFromUtf8(isolate, "horizon"), Number::New(isolate, hrz));
    args.GetReturnValue().Set(rst);
};

void InterpreterV8::MoonHorizon(const Arguments &args)
{
    Isolate *isolate = Isolate::GetCurrent();

    AstroArgs local;
    try
    {
        local = EvalAstroArgs(0, args, 2);
    }
    catch (const exception &e)
    {
        isolate->ThrowException(String::NewFromUtf8(isolate, e.what()));
        return;
    }

    const HandleScope handle_scope(isolate);

    ln_rst_time moon;
    const bool rc = ln_get_lunar_rst(local.jd-0.5, &local.posn, &moon)==0;
    Handle<Object> rst = ConstructRiseSet(local, moon, rc);
    args.GetReturnValue().Set(rst);
};
#endif

// ==========================================================================
//                            Process control
// ==========================================================================

bool InterpreterV8::HandleException(TryCatch& try_catch, const char *where)
{
    if (!try_catch.HasCaught() || !try_catch.CanContinue())
        return true;

    Isolate *isolate = Isolate::GetCurrent();

    const HandleScope handle_scope(isolate);

    Handle<Value> except = try_catch.Exception();
    if (except.IsEmpty() || except->IsNull())
        return true;

    const String::Utf8Value exception(except);

    const Handle<Message> message = try_catch.Message();
    if (message.IsEmpty())
        return false;

    ostringstream out;

    if (!message->GetScriptResourceName()->IsUndefined())
    {
        // Print (filename):(line number): (message).
        const String::Utf8Value filename(message->GetScriptResourceName());
        if (filename.length()>0)
        {
            out << *filename;
            if (message->GetLineNumber()>0)
                out << ": l." << message->GetLineNumber();
            if (*exception)
                out << ": ";
        }
    }

    if (*exception)
        out << *exception;

    out << " [" << where << "]";

    JsException(out.str());

    // Print line of source code.
    const String::Utf8Value sourceline(message->GetSourceLine());
    if (*sourceline)
        JsException(*sourceline);

    // Print wavy underline (GetUnderline is deprecated).
    const int start = message->GetStartColumn();
    const int end   = message->GetEndColumn();

    out.str("");
    if (start>0)
        out << setfill(' ') << setw(start) << ' ';
    out << setfill('^') << setw(end-start) << '^';

    JsException(out.str());

    const String::Utf8Value stack_trace(try_catch.StackTrace());
    if (stack_trace.length()<=0)
        return false;

    if (!*stack_trace)
        return false;

    const string trace(*stack_trace);

    typedef boost::char_separator<char> separator;
    const boost::tokenizer<separator> tokenizer(trace, separator("\n"));

    // maybe skip: "    at internal:"
    // maybe skip: "    at unknown source:"

    auto it = tokenizer.begin();
    JsException("");
    while (it!=tokenizer.end())
        JsException(*it++);

    return false;
}

Handle<Value> InterpreterV8::ExecuteInternal(const string &code)
{
    Isolate *isolate = Isolate::GetCurrent();

    // Try/catch and re-throw hides our internal code from
    // the displayed exception showing the origin and shows
    // the user function instead.
    TryCatch exception(isolate);

    const Handle<Value> result = ExecuteCode(code);

    // This hides the location of the exception in the internal code,
    // which is wanted.
    if (exception.HasCaught())
        exception.ReThrow();

    return result;
}

Handle<Value> InterpreterV8::ExecuteCode(const string &code, const string &file)
{
    Isolate *isolate = Isolate::GetCurrent();

    EscapableHandleScope handle_scope(isolate);

    MaybeLocal<String> source = String::NewFromUtf8(isolate, code.c_str(), NewStringType::kNormal, code.size());
    const Handle<String> origin = String::NewFromUtf8(isolate, file.c_str());
    if (source.IsEmpty())
        return Undefined(isolate);

    ScriptOrigin sorigin(origin);

    Local<Context> context = isolate->GetCurrentContext();
    MaybeLocal<Script> script = Script::Compile(context, source.ToLocalChecked(), &sorigin);
    if (script.IsEmpty())
        return Undefined(isolate);

    const Handle<String> __date__ = String::NewFromUtf8(isolate, "__DATE__");
    const Handle<String> __file__ = String::NewFromUtf8(isolate, "__FILE__");

    Handle<Value> save_date;
    Handle<Value> save_file;

    //*NEW* FIMXE: context->Global() or isolate->GetCurrentContext()
    Handle<Object> global = /*Context::GetCurrent()*/context->Global();
    if (!global.IsEmpty())
    {
        struct stat attrib;
        if (stat(file.c_str(), &attrib)==0)
        {
            save_date = global->Get(__date__);
            save_file = global->Get(__file__);

            global->Set(__file__, String::NewFromUtf8(isolate, file.c_str()));

            const Local<Value> date = Date::New(isolate, attrib.st_mtime*1000);
            if (!date.IsEmpty())
                global->Set(__date__, date);
        }
    }

    MaybeLocal<Value> rc = script.ToLocalChecked()->Run(context);
    if (rc.IsEmpty())
        return Undefined(isolate);

    if (!global.IsEmpty() && !save_date.IsEmpty())
    {
        global->/*Force*/Set(__date__, save_date);
        global->/*Force*/Set(__file__, save_file);
    }

    return handle_scope.Escape(rc.ToLocalChecked());
}

void InterpreterV8::ExecuteConsole()
{
    WindowLog lout;
    lout << "\n " << kUnderline << " JavaScript interpreter " << kReset << " (enter '.q' to quit)\n" << endl;

    Readline::StaticPushHistory("java.his");

    string command;
    while (1)
    {
        Isolate *isolate = Isolate::GetCurrent();

        // Create a local handle scope so that left-overs from single
        // console inputs will not fill up the memory
        const HandleScope handle_scope(isolate);

        // Unlocking is necessary for the preemption to work
        const Unlocker global_unlock(isolate);

        const string buffer = Tools::Trim(Readline::StaticPrompt(command.empty() ? "JS> " : " \\> "));
        if (buffer==".q")
            break;

        // buffer empty, do nothing
        if (buffer.empty())
            continue;

        // Compose command
        if (!command.empty())
            command += ' ';
        command += buffer;

        // If line ends with a backslash, allow addition of next line
        auto back = command.rbegin();
        if (*back=='\\')
        {
            *back = ' ';
            command = Tools::Trim(command);
            continue;
        }

        // Locking is necessary to be able to execute java script code
        const Locker lock(isolate);

        // Catch exceptions during code compilation
        TryCatch exception(isolate);

        // Execute code which was entered
        const Handle<Value> rc = ExecuteCode(command, "console");

        // If all went well and the result wasn't undefined then print
        // the returned value.
        if (!rc->IsUndefined() && !rc->IsFunction())
            JsResult(*String::Utf8Value(rc));

        if (!HandleException(exception, "console"))
            lout << endl;

        // Stop all other threads
        for (auto it=fThreadIsolates.begin(); it!=fThreadIsolates.end(); it++)
            (*it)->TerminateExecution();

        // Allow the java scripts (threads) to run and hence to terminate
        const Unlocker unlock(isolate);

        // Wait until all threads are terminated
        while (!fThreadIsolates.empty())
            usleep(1000);

        // command has been executed, collect new command
        command = "";
    }

    lout << endl;

    Readline::StaticPopHistory("java.his");
}

// ==========================================================================
//                                  CORE
// ==========================================================================

InterpreterV8::InterpreterV8() : fMainThread(nullptr)
{
    const string ver(V8::GetVersion());

    typedef boost::char_separator<char> separator;
    const boost::tokenizer<separator> tokenizer(ver, separator("."));

    const vector<string> tok(tokenizer.begin(), tokenizer.end());

    const int major = tok.size()>0 ? stol(tok[0]) : -1;
    const int minor = tok.size()>1 ? stol(tok[1]) : -1;
    const int build = tok.size()>2 ? stol(tok[2]) : -1;

    if (major>3 || (major==3 && minor>9) || (major==3 && minor==9 && build>10))
    {
        const string argv = "--use_strict";
        V8::SetFlagsFromString(argv.c_str(), argv.size());
    }

    /*
     const string argv1 = "--prof";
     const string argv2 = "--noprof-lazy";

     V8::SetFlagsFromString(argv1.c_str(), argv1.size());
     V8::SetFlagsFromString(argv2.c_str(), argv2.size());
     */

    if (!fPlatform)
    {
        // Initialize V8.
        V8::InitializeICU();
        //v8::V8::InitializeExternalStartupData(argv[0]);
        fPlatform = platform::NewDefaultPlatform();
        V8::InitializePlatform(fPlatform.get());
        V8::Initialize();

        // Releases any resources used by v8 and stops any utility threads
        // that may be running. Note that disposing v8 is permanent,
        // it cannot be reinitialized.
        // It should generally not be necessary to dispose v8 before exiting
        // a process, this should happen automatically. It is only necessary
        // to use if the process needs the resources taken up by v8.
        //
        // v8::V8::Dispose();
        // v8::V8::ShutdownPlatform();
    }

    This = this;
}

Handle<Value> InterpreterV8::Constructor(const Arguments &args)
{
    vector<Handle<Value>> argv(args.Length());

    for (int i=0; i<args.Length(); i++)
        argv[i] = args[i];

    Local<Context> context = Isolate::GetCurrent()->GetCurrentContext();
    MaybeLocal<Value> obj = args.This()->CallAsConstructor(context, args.Length(), argv.data());
    if (obj.IsEmpty())
        return Undefined(Isolate::GetCurrent());

    return obj.ToLocalChecked();
}


void InterpreterV8::AddFormatToGlobal()// const
{
    const string code =
        "String.form = function(str, arr)"
        "{"
            "var i = -1;"
            "function callback(exp, p0, p1, p2, p3, p4/*, pos, str*/)"
            "{"
                "if (exp=='%%')"
                    "return '%';"
                ""
                "if (arr[++i]===undefined)"
                    "return undefined;"
                ""
                "var exp  = p2 ? parseInt(p2.substr(1)) : undefined;"
                "var base = p3 ? parseInt(p3.substr(1)) : undefined;"
                ""
                "var val;"
                "switch (p4)"
                "{"
                "case 's': val = arr[i]; break;"
                "case 'c': val = arr[i][0]; break;"
                "case 'f': val = parseFloat(arr[i]).toFixed(exp); break;"
                "case 'p': val = parseFloat(arr[i]).toPrecision(exp); break;"
                "case 'e': val = parseFloat(arr[i]).toExponential(exp); break;"
                "case 'x': val = parseInt(arr[i]).toString(base?base:16); break;"
                "case 'd': val = parseFloat(parseInt(arr[i], base?base:10).toPrecision(exp)).toFixed(0); break;"
                //"default:\n"
                //"    throw new SyntaxError('Conversion specifier '+p4+' unknown.');\n"
                "}"
                ""
                "val = val==undefined || typeof(val)=='object' ? JSON.stringify(val) : val.toString(base);"
                ""
                "var sz = parseInt(p1); /* padding size */"
                "var ch = p1 && p1[0]=='0' ? '0' : ' '; /* isnull? */"
                "while (val.length<sz)"
                    "val = p0 !== undefined ? val+ch : ch+val; /* isminus? */"
                ""
                "return val;"
            "}"
            ""
            "var regex = /%(-)?(0?[0-9]+)?([.][0-9]+)?([#][0-9]+)?([scfpexd])/g;"
            "return str.replace(regex, callback);"
        "}"
        "\n"
        "String.prototype.$ = function()"
        "{"
            "return String.form(this, Array.prototype.slice.call(arguments));"
        "}"
        "\n"
        "String.prototype.count = function(c,i)"
        "{"
            "return (this.match(new RegExp(c,i?'gi':'g'))||[]).length;"
        "}"/*
        "\n"
        "var format = function()"
        "{"
            "return dim.format(arguments[0], Array.prototype.slice.call(arguments,1));"
        "}"*/;

    Isolate *isolate = Isolate::GetCurrent();

    // Create a string containing the JavaScript source code.
    const Local<String> source = String::NewFromUtf8(isolate, code.c_str(), v8::NewStringType::kNormal).ToLocalChecked();;

    // Compile the source code.
    const Local<Script> script = Script::Compile(isolate->GetCurrentContext(), source).ToLocalChecked();

    // Run the script to get the result.
    if (!script.IsEmpty())
        script->Run(isolate->GetCurrentContext()).IsEmpty(); // Is empty to avoid warning on usused return value
}

void InterpreterV8::JsLoad(const std::string &)
{
    Readline::SetScriptDepth(1);
}

void InterpreterV8::JsEnd(const std::string &)
{
    Readline::SetScriptDepth(0);
}

// For debugging purposes only
// void BeforeCallEnteredCallbackF(Isolate*isolate) { cout << ">> " << isolate << endl; }
// void CallCompletedCallbackF(Isolate*isolate) { cout << "<< " << isolate << endl; }

bool InterpreterV8::JsRun(const string &filename, const map<string, string> &map)
{
    JsPrint(string("JavaScript Engine V8 ")+V8::GetVersion());
    JsLoad(filename);

    // Create a new Isolate and make it the current one.
    Isolate::CreateParams create_params;
    create_params.array_buffer_allocator = ArrayBuffer::Allocator::NewDefaultAllocator();

    Isolate* isolate = Isolate::New(create_params);

    // For debugging purposes only
    // isolate->AddBeforeCallEnteredCallback    (       BeforeCallEnteredCallbackF);
    // isolate->AddCallCompletedCallback        (       CallCompletedCallbackF);

    {
        // #
        // # Fatal error in HandleScope::HandleScope
        // # Entering the V8 API without proper locking in place
        // #
        const Locker lock(isolate);

        const Isolate::Scope isolate_scope(isolate);

        // Create a stack-allocated handle scope.
        const HandleScope handle_scope(isolate);

        // ===================================================================================

        // Create a template for the global object.
        Handle<ObjectTemplate> dim = ObjectTemplate::New(isolate);
        dim->Set(String::NewFromUtf8(isolate, "log"),            FunctionTemplate::New(isolate, WrapLog),            ReadOnly);
        dim->Set(String::NewFromUtf8(isolate, "alarm"),          FunctionTemplate::New(isolate, WrapAlarm),          ReadOnly);
        dim->Set(String::NewFromUtf8(isolate, "wait"),           FunctionTemplate::New(isolate, WrapWait),           ReadOnly);
        dim->Set(String::NewFromUtf8(isolate, "send"),           FunctionTemplate::New(isolate, WrapSend),           ReadOnly);
        dim->Set(String::NewFromUtf8(isolate, "state"),          FunctionTemplate::New(isolate, WrapState),          ReadOnly);
        dim->Set(String::NewFromUtf8(isolate, "version"),        Integer::New(isolate, DIM_VERSION_NUMBER),          ReadOnly);
        dim->Set(String::NewFromUtf8(isolate, "getStates"),      FunctionTemplate::New(isolate, WrapGetStates),      ReadOnly);
        dim->Set(String::NewFromUtf8(isolate, "getDescription"), FunctionTemplate::New(isolate, WrapGetDescription), ReadOnly);
        dim->Set(String::NewFromUtf8(isolate, "getServices"),    FunctionTemplate::New(isolate, WrapGetServices),    ReadOnly);

        Handle<ObjectTemplate> dimctrl = ObjectTemplate::New(isolate);
        dimctrl->Set(String::NewFromUtf8(isolate, "defineState"),         FunctionTemplate::New(isolate, WrapNewState),         ReadOnly);
        dimctrl->Set(String::NewFromUtf8(isolate, "setState"),            FunctionTemplate::New(isolate, WrapSetState),         ReadOnly);
        dimctrl->Set(String::NewFromUtf8(isolate, "getState"),            FunctionTemplate::New(isolate, WrapGetState),         ReadOnly);
        dimctrl->Set(String::NewFromUtf8(isolate, "setInterruptHandler"), FunctionTemplate::New(isolate, WrapSetInterrupt),     ReadOnly);
        dimctrl->Set(String::NewFromUtf8(isolate, "triggerInterrupt"),    FunctionTemplate::New(isolate, WrapTriggerInterrupt), ReadOnly);

        Handle<ObjectTemplate> v8 = ObjectTemplate::New(isolate);
        v8->Set(String::NewFromUtf8(isolate, "sleep"),   FunctionTemplate::New(isolate, WrapSleep),      ReadOnly);
        v8->Set(String::NewFromUtf8(isolate, "timeout"), FunctionTemplate::New(isolate, WrapTimeout),    ReadOnly);
        v8->Set(String::NewFromUtf8(isolate, "version"), String::NewFromUtf8(isolate, V8::GetVersion()), ReadOnly);

        Handle<ObjectTemplate> console = ObjectTemplate::New(isolate);
        console->Set(String::NewFromUtf8(isolate, "out"),  FunctionTemplate::New(isolate, WrapOut),  ReadOnly);
        console->Set(String::NewFromUtf8(isolate, "warn"), FunctionTemplate::New(isolate, WrapWarn), ReadOnly);

        Handle<ObjectTemplate> onchange = ObjectTemplate::New(isolate);
        //onchange->SetNamedPropertyHandler(OnChangeGet, WrapOnChangeSet);
        onchange->SetHandler(v8::NamedPropertyHandlerConfiguration(OnChangeGet, WrapOnChangeSet));
        dim->Set(String::NewFromUtf8(isolate, "onchange"), onchange);

        Handle<ObjectTemplate> global = ObjectTemplate::New(isolate);
        global->Set(String::NewFromUtf8(isolate, "v8"),      v8,      ReadOnly);
        global->Set(String::NewFromUtf8(isolate, "dim"),     dim,     ReadOnly);
        global->Set(String::NewFromUtf8(isolate, "dimctrl"), dimctrl, ReadOnly);
        global->Set(String::NewFromUtf8(isolate, "console"), console, ReadOnly);
        global->Set(String::NewFromUtf8(isolate, "include"), FunctionTemplate::New(isolate, WrapInclude), ReadOnly);
        global->Set(String::NewFromUtf8(isolate, "exit"),    FunctionTemplate::New(isolate, WrapExit),    ReadOnly);

        Handle<FunctionTemplate> sub = FunctionTemplate::New(isolate, WrapSubscription);
        sub->SetClassName(String::NewFromUtf8(isolate, "Subscription"));
        sub->InstanceTemplate()->SetInternalFieldCount(1);
        global->Set(String::NewFromUtf8(isolate, "Subscription"), sub, ReadOnly);

#ifdef HAVE_SQL
        Handle<FunctionTemplate> db = FunctionTemplate::New(isolate, WrapDatabase);
        db->SetClassName(String::NewFromUtf8(isolate, "Database"));
        db->InstanceTemplate()->SetInternalFieldCount(1);
        global->Set(String::NewFromUtf8(isolate, "Database"), db, ReadOnly);
#endif

        Handle<FunctionTemplate> thread = FunctionTemplate::New(isolate, WrapThread);
        thread->SetClassName(String::NewFromUtf8(isolate, "Thread"));
#if 0
        global->Set(String::NewFromUtf8(isolate, "Thread"), thread, ReadOnly);
#endif

        Handle<FunctionTemplate> file = FunctionTemplate::New(isolate, WrapFile);
        file->SetClassName(String::NewFromUtf8(isolate, "File"));
        global->Set(String::NewFromUtf8(isolate, "File"), file, ReadOnly);

        Handle<FunctionTemplate> evt = FunctionTemplate::New(isolate);
        evt->SetClassName(String::NewFromUtf8(isolate, "Event"));
        global->Set(String::NewFromUtf8(isolate, "Event"), evt, ReadOnly);

        Handle<FunctionTemplate> desc = FunctionTemplate::New(isolate);
        desc->SetClassName(String::NewFromUtf8(isolate, "Description"));
        global->Set(String::NewFromUtf8(isolate, "Description"), desc, ReadOnly);

        fTemplateEvent = evt;
        fTemplateDescription = desc;

#ifdef HAVE_MAILX
        Handle<FunctionTemplate> mail = FunctionTemplate::New(isolate, ConstructorMail);
        mail->SetClassName(String::NewFromUtf8(isolate, "Mail"));
        global->Set(String::NewFromUtf8(isolate, "Mail"), mail, ReadOnly);
#endif

#ifdef HAVE_CURL
        Handle<FunctionTemplate> curl = FunctionTemplate::New(isolate, ConstructorCurl);
        curl->SetClassName(String::NewFromUtf8(isolate, "Curl"));
        global->Set(String::NewFromUtf8(isolate, "Curl"), curl, ReadOnly);
#endif

#ifdef HAVE_NOVA
        Handle<FunctionTemplate> sky = FunctionTemplate::New(isolate, ConstructorSky);
        sky->SetClassName(String::NewFromUtf8(isolate, "Sky"));
        sky->Set(String::NewFromUtf8(isolate, "dist"),  FunctionTemplate::New(isolate, SkyDist), ReadOnly);
        global->Set(String::NewFromUtf8(isolate, "Sky"), sky, ReadOnly);

        Handle<FunctionTemplate> loc = FunctionTemplate::New(isolate, ConstructorLocal);
        loc->SetClassName(String::NewFromUtf8(isolate, "Local"));
        loc->Set(String::NewFromUtf8(isolate, "dist"),  FunctionTemplate::New(isolate, LocalDist), ReadOnly);
        global->Set(String::NewFromUtf8(isolate, "Local"), loc, ReadOnly);

        Handle<FunctionTemplate> moon = FunctionTemplate::New(isolate, ConstructorMoon);
        moon->SetClassName(String::NewFromUtf8(isolate, "Moon"));
        moon->Set(String::NewFromUtf8(isolate, "disk"), FunctionTemplate::New(isolate, MoonDisk), ReadOnly);
        moon->Set(String::NewFromUtf8(isolate, "horizon"), FunctionTemplate::New(isolate, MoonHorizon), ReadOnly);
        global->Set(String::NewFromUtf8(isolate, "Moon"), moon, ReadOnly);

        Handle<FunctionTemplate> sun = FunctionTemplate::New(isolate);
        sun->SetClassName(String::NewFromUtf8(isolate, "Sun"));
        sun->Set(String::NewFromUtf8(isolate, "horizon"), FunctionTemplate::New(isolate, SunHorizon), ReadOnly);
        global->Set(String::NewFromUtf8(isolate, "Sun"), sun, ReadOnly);

        fTemplateLocal = loc;
        fTemplateSky   = sky;
#endif

        // ===================================================================================

        // Create a new context with "global" as contents
        Local<Context> context = Context::New(isolate, nullptr, global);
        if (context.IsEmpty())
        {
            JsException("Creation of global context failed...");
            JsEnd(filename);
            return false;
        }

        // Switch off eval(). It is not possible to track it's exceptions.
        context->AllowCodeGenerationFromStrings(false);

        // Enter the context for compiling and running the hello world script.
        const Context::Scope scope(context);

        // ===================================================================================

        Handle<Array> args = Array::New(isolate, map.size());
        for (auto it=map.begin(); it!=map.end(); it++)
            args->Set(String::NewFromUtf8(isolate, it->first.c_str()), String::NewFromUtf8(isolate, it->second.c_str()));

        context->Global()->Set(String::NewFromUtf8(isolate, "$"),   args/*, ReadOnly*/);
        context->Global()->Set(String::NewFromUtf8(isolate, "arg"), args/*, ReadOnly*/);

        const Local<Value> starttime = Date::New(isolate, Time().JavaDate());
        if (!starttime.IsEmpty())
            context->Global()->Set(String::NewFromUtf8(isolate, "__START__"), starttime/*, ReadOnly*/);

        //V8::ResumeProfiler();

        TryCatch exception(isolate);

        AddFormatToGlobal();

        // ===================================================================================

        if (!exception.HasCaught())
        {
#if 0
            // Create a string containing the JavaScript source code.
            v8::Local<v8::String> source =
                v8::String::NewFromUtf8(isolate, "var x=5; 'Hello' + ', World!'+x", v8::NewStringType::kNormal).ToLocalChecked();

            // Compile the source code.
            v8::Local<v8::Script> script =
                v8::Script::Compile(context, source).ToLocalChecked();

            // Run the script to get the result.
            v8::Local<v8::Value> result =
                script->Run(context).ToLocalChecked();

            // Convert the result to an UTF8 string and print it.
            v8::String::Utf8Value utf8(isolate, result);
            printf("%s\n", *utf8);
#endif

            JsStart(filename);

//        Locker::StartPreemption(10);

            // We are ready to go an can allow other threads to run...
            fMainThread = isolate;

            if (filename.empty())
            {
                JsSetState(3);
                ExecuteConsole();
            }
            else
            {
                // We call script->Run because it is the only way to
                // catch exceptions.
                const Handle<String> source = String::NewFromUtf8(isolate, ("include('"+filename+"');").c_str());
                const Handle<String> origin = String::NewFromUtf8(isolate, "main");
                const Handle<Script> script = Script::Compile(source, origin);
                if (!script.IsEmpty())
                 {
                     JsSetState(3);
                     script->Run();
                 }
            }

            // Before releasing the Lock, signal all other threads not to run again
            fMainThread = 0;

            //        Locker::StopPreemption();
/*OLD*/
            // Stop all other threads
            //        for (auto it=fThreadIsolates.begin(); it!=fThreadIsolates.end(); it++)
            //            (*it)->TerminateExecution();
            //        fThreadIsolates.clear();
        }

        // Handle an exception
        HandleException(exception, "main");
    }

    // Just to be on the safe side:
    // Terminate all other threads once they try to run
    isolate->AddBeforeCallEnteredCallback(TerminateExecution);

    // Wait until all threads have finished so that we can safely(?) proceed
    while (isolate->IsInUse())
        usleep(50);

    // The threads are started already and wait to get the lock
    // So we have to unlock (manual preemtion) so that they get
    // the signal to terminate.
    /*
    {
        const Unlocker unlock(isolate);

        for (auto it=fThreads.begin(); it!=fThreads.end(); it++)
        {
            it->join();
            fThreads.clear();
        }*/

    // Now we can dispose the persistent interrupt handler
    fInterruptCallback.Reset();

    // Now we can dispose all persistent handles from state callbacks
    fStateCallbacks.clear();

    // ... and from the onchange callbacks
    fReverseMap.clear();

#ifdef HAVE_SQL
    // ...and close all database handles
    for (auto it=fDatabases.begin(); it!=fDatabases.end(); it++)
        delete *it;
    fDatabases.clear();
#endif

    //fStates.clear();

    isolate->Dispose();

    delete create_params.array_buffer_allocator;
    create_params.array_buffer_allocator = 0;

    JsEnd(filename);

    return 0;
}

void InterpreterV8::JsStop()
{
    Isolate *isolate = This ? This->fMainThread : nullptr;
    if (!isolate)
        return;

    // Terminate the main thread immediately
    isolate->TerminateExecution();
    // Terminate all other threads once they try to run
    isolate->AddBeforeCallEnteredCallback(TerminateExecution);
}

vector<string> InterpreterV8::JsGetCommandList(const char *, int) const
{
    vector<string> rc;

    rc.emplace_back("for (");
    rc.emplace_back("while (");
    rc.emplace_back("if (");
    rc.emplace_back("switch (");
    rc.emplace_back("case ");
    rc.emplace_back("var ");
    rc.emplace_back("function ");
    rc.emplace_back("Date(");
    rc.emplace_back("new Date(");
    rc.emplace_back("'use strict';");
    rc.emplace_back("undefined");
    rc.emplace_back("null");
    rc.emplace_back("delete ");
    rc.emplace_back("JSON.stringify(");
    rc.emplace_back("JSON.parse(");

    rc.emplace_back("dim.log(");
    rc.emplace_back("dim.alarm(");
    rc.emplace_back("dim.wait(");
    rc.emplace_back("dim.send(");
    rc.emplace_back("dim.state(");
    rc.emplace_back("dim.version");
    rc.emplace_back("dim.getStates(");
    rc.emplace_back("dim.getDescription(");
    rc.emplace_back("dim.getServices(");

    rc.emplace_back("dimctrl.defineState(");
    rc.emplace_back("dimctrl.setState(");
    rc.emplace_back("dimctrl.getState(");
    rc.emplace_back("dimctrl.setInterruptHandler(");
    rc.emplace_back("dimctrl.triggerInterrupt(");

    rc.emplace_back("v8.sleep(");
    rc.emplace_back("v8.timeout(");
    rc.emplace_back("v8.version");

    rc.emplace_back("console.out(");
    rc.emplace_back("console.warn(");

    rc.emplace_back("include(");
    rc.emplace_back("exit()");

#ifdef HAVE_SQL
    rc.emplace_back("Database(");
    rc.emplace_back("new Database(");

    rc.emplace_back(".table");
    rc.emplace_back(".user");
    rc.emplace_back(".database");
    rc.emplace_back(".port");
    rc.emplace_back(".query");
#endif

    rc.emplace_back("Subscription(");
    rc.emplace_back("new Subscription(");

    rc.emplace_back("Thread(");
    rc.emplace_back("new Thread(");

    rc.emplace_back("File(");
    rc.emplace_back("new File(");

    rc.emplace_back("Event(");
    rc.emplace_back("new Event(");

    rc.emplace_back("Description(");
    rc.emplace_back("new Description(");

#ifdef HAVE_MAILX
    rc.emplace_back("Mail(");
    rc.emplace_back("new Mail(");

    rc.emplace_back(".subject");
    rc.emplace_back(".receipients");
    rc.emplace_back(".attachments");
    rc.emplace_back(".bcc");
    rc.emplace_back(".cc");
    rc.emplace_back(".text");
    rc.emplace_back(".send(");
#endif

#ifdef HAVE_CURL
    rc.emplace_back("Curl(");
    rc.emplace_back("new Curl(");

    rc.emplace_back(".url");
    rc.emplace_back(".user");
    rc.emplace_back(".data");
//    rc.emplace_back(".send("); -> MAILX
#endif

#ifdef HAVE_NOVA
    rc.emplace_back("Sky(");
    rc.emplace_back("new Sky(");

    rc.emplace_back("Sky.dist");
    rc.emplace_back("Local(");

    rc.emplace_back("new Local(");
    rc.emplace_back("Local.dist");

    rc.emplace_back("Moon(");
    rc.emplace_back("new Moon(");
    rc.emplace_back("Moon.disk(");
    rc.emplace_back("Moon.horizon(");

    rc.emplace_back("Sun.horizon(");

    rc.emplace_back(".zd");
    rc.emplace_back(".az");
    rc.emplace_back(".ra");
    rc.emplace_back(".dec");

    rc.emplace_back(".toLocal(");
    rc.emplace_back(".toSky(");
    rc.emplace_back(".rise");
    rc.emplace_back(".set");
    rc.emplace_back(".transit");
    rc.emplace_back(".isUp");

    rc.emplace_back("horizon");
    rc.emplace_back("civil");
    rc.emplace_back("nautical");
    rc.emplace_back("astronomical");
#endif

    rc.emplace_back(".server");
    rc.emplace_back(".service");
    rc.emplace_back(".name");
    rc.emplace_back(".isCommand");
    rc.emplace_back(".format");
    rc.emplace_back(".description");
    rc.emplace_back(".unit");
    rc.emplace_back(".delim");
    rc.emplace_back(".isOpen");

    rc.emplace_back(".qos");
    rc.emplace_back(".size");
    rc.emplace_back(".counter");
    rc.emplace_back(".type");
    rc.emplace_back(".obj");
    rc.emplace_back(".data");
    rc.emplace_back(".comment");
    rc.emplace_back(".index");
    rc.emplace_back(".time");
    rc.emplace_back(".close()");
    rc.emplace_back(".onchange");
    rc.emplace_back(".get(");


    rc.emplace_back("__DATE__");
    rc.emplace_back("__FILE__");

    return rc;
}

#endif

InterpreterV8 *InterpreterV8::This = 0;
unique_ptr<v8::Platform> InterpreterV8::fPlatform;