pluotsorbet/native.js

293 строки
9.5 KiB
JavaScript
Исходник Обычный вид История

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/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set shiftwidth=4 tabstop=4 autoindent cindent expandtab: */
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'Use strict';
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var Native = {};
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Native.invoke = function(caller, methodInfo, callback) {
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if (!methodInfo.native) {
var key = methodInfo.classInfo.className + "." + methodInfo.name + "." + methodInfo.signature;
methodInfo.native = Native.fast[key];
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if (!methodInfo.native)
return Native.slow[key](caller, callback);
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}
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function pushType(type, value) {
if (type === "long" || type === "double") {
caller.stack.push2(value);
return;
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}
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caller.stack.push(value);
}
function popType(type) {
return (type === "long" || type === "double") ? caller.stack.pop2() : caller.stack.pop();
}
function popArgs(types) {
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var argc = types.length;
if (!ACCESS_FLAGS.isStatic(methodInfo.access_flags))
++argc;
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var args = Array(argc);
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for (var i=types.length-1, j=args.length-1; i >= 0; --i, --j)
args[j] = popType(types[i].type);
if (j >= 0)
args[0] = caller.stack.pop();
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return args;
}
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var signature = Signature.parse(methodInfo.signature);
var args = popArgs(signature.IN);
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var result = methodInfo.native.apply(caller, args);
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if (signature.OUT.length)
pushType(signature.OUT[0].type, result);
return true;
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}
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Native.fast = {};
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Native.slow = {};
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Native.fast["java/lang/System.arraycopy.(Ljava/lang/Object;ILjava/lang/Object;II)V"] = function(src, srcOffset, dst, dstOffset, length) {
var frame = this;
if (!src || !dst) {
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throw this.newException("java/lang/NullPointerException", "Cannot copy to/from a null array.");
return;
}
var srcClass = src.class;
var dstClass = dst.class;
if (!srcClass.isArrayClass || !dstClass.isArrayClass) {
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throw this.newException("java/lang/ArrayStoreException", "Can only copy to/from array types.");
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return;
}
if (srcClass != dstClass && (!srcClass.elementClass || !dstClass.elementClass || !srcClass.elementClass.isAssignableTo(dstClass.elementClass))) {
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throw this.newException("java/lang/ArrayStoreException", "Incompatible component types.");
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return;
}
if (srcOffset < 0 || (srcOffset+length) > src.length || dstOffset < 0 || (dstOffset+length) > dst.length || length < 0) {
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throw this.newException("java/lang/ArrayIndexOutOfBoundsException", "Invalid index.");
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return;
}
if (dst !== src || dstOffset < srcOffset) {
for (var n = 0; n < length; ++n)
dst[dstOffset++] = src[srcOffset++];
} else {
dstOffset += length;
srcOffset += length;
for (var n = 0; n < length; ++n)
dst[--dstOffset] = src[--srcOffset];
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}
}
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Native.fast["java/lang/System.getProperty0.(Ljava/lang/String;)Ljava/lang/String;"] = function(key) {
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switch (util.fromJavaString(key)) {
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case "microedition.encoding":
return this.newString("UTF-8");
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}
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console.log("UNKNOWN PROPERTY: " + util.fromJavaString(key));
return null;
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}
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Native.fast["java/lang/System.currentTimeMillis.()J"] = function() {
return Long.fromNumber(Date.now());
}
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Native.fast["com/sun/cldchi/jvm/JVM.unchecked_char_arraycopy.([CI[CII)V"] = function(src, srcOffset, dst, dstOffset, length) {
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if (dst !== src || dstOffset < srcOffset) {
for (var n = 0; n < length; ++n)
dst[dstOffset++] = src[srcOffset++];
} else {
dstOffset += length;
srcOffset += length;
for (var n = 0; n < length; ++n)
dst[--dstOffset] = src[--srcOffset];
}
}
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Native.fast["java/lang/Object.getClass.()Ljava/lang/Class;"] = function(obj) {
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return obj.class.getClassObject();
}
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Native.fast["java/lang/Class.getName.()Ljava/lang/String;"] = function(obj) {
var frame = this;
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return util.cache(obj, "getName", function () {
return frame.newString(obj.vmClass.className.replace("/", ".", "g"));
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});
}
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Native.fast["java/lang/Class.forName.(Ljava/lang/String;)Ljava/lang/Class;"] = function(name) {
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var className = util.fromJavaString(name).replace(".", "/", "g");
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var classInfo = (className[0] === "[") ? null : CLASSES.getClass(className);
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if (!classInfo) {
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throw new Native.VM.JavaException("java/lang/ClassNotFoundException", "'" + className + "' not found.");
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}
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return classInfo.getClassObject();
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}
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Native.fast["java/lang/Class.newInstance.()Ljava/lang/Object;"] = function(classObject) {
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var classInfo = classObject.vmClass;
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this.initClass(classInfo);
var obj = CLASSES.newObject(classInfo);
this.invokeConstructor(obj);
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return obj;
};
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Native.fast["java/lang/Class.isInterface.()Z"] = function(classObject) {
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var classInfo = classObject.vmClass;
return ACCESS_FLAGS.isInterface(classInfo.access_flags) ? 1 : 0;
}
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Native.fast["java/lang/Class.isArray.()Z"] = function(classObject) {
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var classInfo = classObject.vmClass;
return classInfo.isArrayClass ? 1 : 0;
}
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Native.fast["java/lang/Class.isAssignableFrom.(Ljava/lang/Class;)Z"] = function(classObject, fromClass) {
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if (!fromClass) {
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throw this.newException("java/lang/NullPointerException");
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return;
}
return fromClass.vmClass.isAssignableTo(classObject.vmClass) ? 1 : 0;
}
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Native.fast["java/lang/Class.isInstance.(Ljava/lang/Object;)Z"] = function(classObject, obj) {
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return obj && obj.class.isAssignableTo(classObject.vmClass) ? 1 : 0;
}
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Native.fast["java/lang/Float.floatToIntBits.(F)I"] = (function() {
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var fa = Float32Array(1);
var ia = Int32Array(fa.buffer);
return function(f) {
fa[0] = f;
return ia[0];
}
})();
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Native.fast["java/lang/Double.doubleToLongBits.(D)J"] = (function() {
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var da = Float64Array(1);
var ia = Int32Array(da.buffer);
return function(d) {
da[0] = d;
return Long.fromBits(ia[0], ia[1]);
}
})();
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Native.fast["java/lang/Float.intBitsToFloat.(I)F"] = (function() {
var fa = Float32Array(1);
var ia = Int32Array(fa.buffer);
return function(i) {
ia[0] = i;
return fa[0];
}
})();
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Native.fast["java/lang/Double.longBitsToDouble.(J)D"] = (function() {
var da = Float64Array(1);
var ia = Int32Array(da.buffer);
return function(l) {
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ia[0] = l.low_;
ia[1] = l.high_;
return da[0];
}
})();
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Native.fast["java/lang/Throwable.fillInStackTrace.()V"] = (function() {
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});
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Native.fast["java/lang/Throwable.obtainBackTrace.()Ljava/lang/Object;"] = (function() {
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return null;
});
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Native.fast["java/lang/Runtime.freeMemory.()J"] = function() {
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return Long.fromInt(0x800000);
}
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Native.fast["java/lang/Runtime.totalMemory.()J"] = function() {
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return Long.fromInt(0x1000000);
}
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Native.fast["java/lang/Runtime.gc.()V"] = function() {
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}
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Native.fast["java/lang/Math.floor.(D)D"] = function(d) {
return Math.floor(d);
}
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Native.fast["java/lang/Thread.currentThread.()Ljava/lang/Thread;"] = function() {
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return this.getThread();
}
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Native.fast["java/lang/Thread.setPriority0.(II)V"] = function(thread, oldPriority, newPriority) {
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}
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Native.fast["java/lang/Thread.start0.()V"] = function(thread) {
// The main thread starts during bootstrap and don't allow calling start()
// on already running threads.
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if (thread === CLASSES.mainThread || thread.running)
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throw this.newException("java/lang/IllegalThreadStateException");
thread.running = true;
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var run = CLASSES.getMethod(thread.class, "run", "()V", false, true);
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window.setZeroTimeout(VM.invoke.bind(VM, thread, run, [thread]));
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}
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Native.slow["java/lang/Thread.sleep.(J)V"] = function(caller, callback) {
var thread = caller.getThread();
var delay = caller.stack.pop2().toNumber();
if (thread.level > 1) {
console.log("WARNING: nested invocation, can't reschedule.");
return true;
}
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window.setTimeout(VM.resume.bind(VM, caller, callback), delay);
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return false;
}
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Native.fast["com/sun/cldchi/io/ConsoleOutputStream.write.(I)V"] = (function() {
var s = "";
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return function(obj, ch) {
if (ch === 10) {
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document.getElementById("output").textContent += s + "\n";
s = "";
return;
}
s += String.fromCharCode(ch);
}
})();
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Native.fast["com/sun/cldc/io/ResourceInputStream.open.(Ljava/lang/String;)Ljava/lang/Object;"] = function(name) {
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var fileName = util.fromJavaString(name);
var data = CLASSES.loadFile(fileName);
if (!data)
return null;
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var obj = CLASSES.newObject(CLASSES.java_lang_Object);
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obj.data = Uint8Array(data);
obj.pos = 0;
return obj;
};
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Native.fast["com/sun/cldc/io/ResourceInputStream.bytesRemain.(Ljava/lang/Object;)I"] = function(handle) {
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return handle.data.length - handle.pos;
}
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Native.fast["com/sun/cldc/io/ResourceInputStream.readByte.(Ljava/lang/Object;)I"] = function(handle) {
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return handle.data[handle.pos++];
}
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Native.fast["com/sun/cldc/io/ResourceInputStream.readBytes.(Ljava/lang/Object;[BII)I"] = function(handle, b, off, len) {
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var data = handle.data;
var remaining = data.length - handle.pos;
if (remaining > len)
len = remaining;
for (var n = 0; n < len; ++n)
b[off+n] = data[n];
handle.pos += len;
return len;
}
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Native.fast["com/sun/cldc/i18n/uclc/DefaultCaseConverter.toLowerCase.(C)C"] = function(c) {
return String.fromCharCode(c).toLowerCase().charCodeAt(0);
}
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Native.fast["com/sun/cldc/i18n/uclc/DefaultCaseConverter.toUpperCase.(C)C"] = function(c) {
return String.fromCharCode(c).toUpperCase().charCodeAt(0);
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}