SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// Multi-Phasic Applications: SquirrelJME
//     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
// ---------------------------------------------------------------------------
// SquirrelJME is under the Mozilla Public License Version 2.0.
// See license.mkd for licensing and copyright information.
// ---------------------------------------------------------------------------

package cc.squirreljme.vm.nanocoat;

import cc.squirreljme.emulator.profiler.ProfilerSnapshot;
import cc.squirreljme.emulator.vm.VMException;
import cc.squirreljme.emulator.vm.VMFactory;
import cc.squirreljme.emulator.vm.VMSuiteManager;
import cc.squirreljme.emulator.vm.VMThreadModel;
import cc.squirreljme.emulator.vm.VirtualMachine;
import cc.squirreljme.jdwp.host.JDWPHostFactory;
import cc.squirreljme.runtime.cldc.debug.Debugging;
import cc.squirreljme.runtime.cldc.util.IntegerArrayList;
import cc.squirreljme.vm.VMClassLibrary;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Objects;

/**
 * Instantiates and initializes the NanoCoat VM.
 *
 * @since 2023/12/03
 */
public class NanoCoatFactory
    extends VMFactory
{
    /**
     * Initializes the factory.
     *
     * @since 2023/12/03
     */
    public NanoCoatFactory()
    {
        super("nanocoat");
    }
    
    /**
     * {@inheritDoc}
     * @since 2023/12/03
     */
    @Override
    protected VirtualMachine createVM(ProfilerSnapshot __profiler,
        JDWPHostFactory __jdwp, VMThreadModel __threadModel,
        VMSuiteManager __suiteManager, VMClassLibrary[] __classpath,
        String __mainClass, Map<String, String> __sysProps, String[] __args)
        throws IllegalArgumentException, NullPointerException, VMException
    {
        // Make sure the native library is loaded
        __Native__.__loadLibrary();
        
        // We need an allocation pool to work with everything
        AllocPool mainPool = new AllocPool(32 * 1048576);
        
        // Allocate the reserved pool, so we can throw everything in there
        AllocLink reservedLink = mainPool.alloc(
            AllocSizeOf.RESERVED_POOL.size());
        AllocPool reservedPool = new AllocPool(reservedLink.pointerAddress(), 
            reservedLink.size());
        
        // Setup virtual suite manager
        VirtualSuite suite = new VirtualSuite(reservedPool, __suiteManager);
        
        // Map the class path to IDs so NanoCoat knows which ones to use
        int numClassPath = __classpath.length;
        int[] classPathIds = new int[numClassPath];
        for (int i = 0; i < numClassPath; i++)
            classPathIds[i] = suite.manager.libraryId(__classpath[i]);
        
        // Debug
        Debugging.debugNote("Main ClassPath: %s",
            IntegerArrayList.asList(classPathIds));
        
        // Initialize boot parameters
        NvmBootParam param = new NvmBootParam(reservedPool);
        
        // Configure the virtual machine
        param.setSuite(suite);
        param.setMainClassPathIds(
            FlatList.fromArray(reservedPool, classPathIds));
        param.setMainClass(reservedPool.strDup(__mainClass));
        param.setMainArgs(FlatList.flatten(reservedPool, __args));
        
        // Determine all system properties to copy
        List<String> rawSysProps = new ArrayList<>(
            __sysProps.size() * 2);
        for (Map.Entry<String, String> entry : __sysProps.entrySet())
        {
            rawSysProps.add(Objects.toString(entry.getKey(), ""));
            rawSysProps.add(Objects.toString(entry.getValue(), ""));
        }
        
        // Set all system properties
        param.setSysProps(FlatList.flatten(reservedPool, rawSysProps));
        
        // Setup main virtual machine
        NvmState state = new NvmState(mainPool, reservedPool, param);
        
        throw Debugging.todo();
    }
}