BicaVM/main.js

include("linearDataStream.js");
include("constantPool.js");

// access flags DEFINE
var ACC_PUBLIC    = 0x0001; // Declared public; may be accessed from outside its package.
var ACC_PRIVATE	  = 0x0002; // Declared private; usable only within the defining class.
var ACC_PROTECTED = 0x0004; // Declared protected; may be accessed within subclasses.
var ACC_STATIC	  = 0x0008; // Declared static.
var ACC_FINAL     = 0x0010; // Declared final; no subclasses allowed.
var ACC_SUPER     = 0x0020; // Treat superclass methods specially when invoked by the invokespecial instruction.
var ACC_VOLATILE  = 0x0040; // Declared volatile; cannot be cached.
var ACC_INTERFACE = 0x0200; // Is an interface, not a class.
var ACC_ABSTRACT  = 0x0400; // Declared abstract; may not be instantiated.
var ACC_TRANSIENT = 0x0080; // Declared transient; not written or read by a persistent object manager.

function slurpFile (filename, fa) {
    var xmlHttpRequest, response, result ;
    // ie support if (typeof ActiveXObject == "function") return this.load_binary_ie9(filename, fa);
    xmlHttpRequest = new XMLHttpRequest();
    xmlHttpRequest.open('GET', filename, false);
    if ('mozResponseType' in xmlHttpRequest) {
        xmlHttpRequest.mozResponseType = 'arraybuffer';
    } else if ('responseType' in xmlHttpRequest) {
        xmlHttpRequest.responseType = 'arraybuffer';
    } else {
        xmlHttpRequest.overrideMimeType('text/plain; charset=x-user-defined');
    }
    xmlHttpRequest.send(null);
    if (xmlHttpRequest.status != 200 && xmlHttpRequest.status != 0) {
        throw "Error while loading " + filename;
    }
    bf = true;
    if ('mozResponse' in xmlHttpRequest) {
        response = xmlHttpRequest.mozResponse;
    } else if (xmlHttpRequest.mozResponseArrayBuffer) {
        response = xmlHttpRequest.mozResponseArrayBuffer;
    } else if ('responseType' in xmlHttpRequest) {
        response = xmlHttpRequest.response;
    } else {
        response = xmlHttpRequest.responseText;
        bf = false;
    }
    if (bf) {
        result = [response.byteLength, response];
    } else {
        throw "No typed arrays";
    }
    return result;
};
log = function (msg){
    write(msg);
    if (console){
        console.log(msg);
    }
}

ClassDefinition = function (file){
    var dataStream = new DataStream(slurpFile(file)[1]);
    this.magic = dataStream.getU4();
    if (this.magic != 0xCAFEBABE){
        throw "Invalid Class Magic (" + this.magic + ")" ;
    }
    this.minorVersion = dataStream.getU2();
    
    this.majorVersion = dataStream.getU2();
    if (this.majorVersion > 50 || this.majorVersion < 45){
        throw "Unsuported java class file format version";
    }
    this.constantPool = new ConstantPool(dataStream);
    this.access_flags = dataStream.getU2();
    
    this.this_class = ConstantPoolRef(dataStream.getU2(), this.constantPool,CONSTANT_Class);
    this.super_class = ConstantPoolRef(dataStream.getU2(), this.constantPool,CONSTANT_Class);
    this.interface_count = dataStream.getU2();
    
    // VER: interfaces refs must be classes
    this.interfaces = [];
    for(var i=0; i<this.interface_count; i++){
        this.interfaces[i] = ConstantPoolRef(dataStream.getU2(), this.constantPool,CONSTANT_Class);
    }

    this.fields_count = dataStream.getU2();
}

function main (args){
    var classDef = new ClassDefinition("Test.class");
}