org.eclipse.swt.browser.InputStream Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of org.eclipse.swt.gtk.hpux.ia64 Show documentation
SWT is an open source widget toolkit for Java designed to provide efficient, portable access to the user-interface facilities of the operating systems on which it is implemented.
The newest version!
/*******************************************************************************
 * Copyright (c) 2003, 2013 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.browser;

import org.eclipse.swt.internal.C;
import org.eclipse.swt.internal.mozilla.*;

class InputStream {
	XPCOMObject inputStream;
	int refCount = 0;

	byte[] buffer;
	int index = 0;
	
InputStream (byte[] buffer) {
	this.buffer = buffer;
	index = 0;
	createCOMInterfaces ();
}

int AddRef () {
	refCount++;
	return refCount;
}

void createCOMInterfaces () {
	/* Create each of the interfaces that this object implements */
	inputStream = new XPCOMObject (new int[] {2, 0, 0, 0, 1, 3, 4, 1}) {
		public long /*int*/ method0 (long /*int*/[] args) {return QueryInterface (args[0], args[1]);}
		public long /*int*/ method1 (long /*int*/[] args) {return AddRef ();}
		public long /*int*/ method2 (long /*int*/[] args) {return Release ();}
		public long /*int*/ method3 (long /*int*/[] args) {return Close ();}
		public long /*int*/ method4 (long /*int*/[] args) {return Available (args[0]);}
		public long /*int*/ method5 (long /*int*/[] args) {return Read (args[0], (int)/*64*/args[1], args[2]);}
		public long /*int*/ method6 (long /*int*/[] args) {return ReadSegments (args[0], args[1], (int)/*64*/args[2], args[3]);}
		public long /*int*/ method7 (long /*int*/[] args) {return IsNonBlocking (args[0]);}
	};
}

void disposeCOMInterfaces () {
	if (inputStream != null) {
		inputStream.dispose ();
		inputStream = null;	
	}
}

long /*int*/ getAddress () {
	return inputStream.getAddress ();
}

int QueryInterface (long /*int*/ riid, long /*int*/ ppvObject) {
	if (riid == 0 || ppvObject == 0) return XPCOM.NS_ERROR_NO_INTERFACE;
	nsID guid = new nsID ();
	XPCOM.memmove (guid, riid, nsID.sizeof);
	
	if (guid.Equals (nsISupports.NS_ISUPPORTS_IID)) {
		XPCOM.memmove (ppvObject, new long /*int*/[] {inputStream.getAddress ()}, C.PTR_SIZEOF);
		AddRef ();
		return XPCOM.NS_OK;
	}
	if (guid.Equals (nsIInputStream.NS_IINPUTSTREAM_IID) || guid.Equals (nsIInputStream.NS_IINPUTSTREAM_17_IID)) {
		XPCOM.memmove (ppvObject, new long /*int*/[] {inputStream.getAddress ()}, C.PTR_SIZEOF);
		AddRef ();
		return XPCOM.NS_OK;
	}	
	XPCOM.memmove (ppvObject, new long /*int*/[] {0}, C.PTR_SIZEOF);
	return XPCOM.NS_ERROR_NO_INTERFACE;
}
        	
int Release () {
	refCount--;
	if (refCount == 0) disposeCOMInterfaces ();
	return refCount;
}
	
/* nsIInputStream implementation */

int Close () {
	buffer = null;
	index = 0;
	return XPCOM.NS_OK;
}

int Available (long /*int*/ _retval) {
	int available = buffer == null ? 0 : buffer.length - index;
	XPCOM.memmove (_retval, new int[] {available}, 4);
	return XPCOM.NS_OK;
}

int Read(long /*int*/ aBuf, int aCount, long /*int*/ _retval) {
	int max = Math.min (aCount, buffer == null ? 0 : buffer.length - index);
	if (max > 0) {
		byte[] src = new byte[max];
		System.arraycopy (buffer, index, src, 0, max);
		XPCOM.memmove (aBuf, src, max);
		index += max;
	}
	XPCOM.memmove(_retval, new int[] {max}, 4);
	return XPCOM.NS_OK;
}

int ReadSegments (long /*int*/ aWriter, long /*int*/ aClosure, int aCount, long /*int*/ _retval) {
	int max = buffer == null ? 0 : buffer.length - index;
	if (aCount != -1) {
		max = Math.min (max, aCount);
	}
	int cnt = max;
	while (cnt > 0) {
		int[] aWriteCount = new int[1];
		long /*int*/ rc = XPCOM.Call (aWriter, getAddress (), aClosure, buffer, index, cnt, aWriteCount);
		if (rc != XPCOM.NS_OK) break;
		index += aWriteCount[0];
		cnt -= aWriteCount[0];
	}
	XPCOM.memmove (_retval, new int[] {max - cnt}, 4);
	return XPCOM.NS_OK;
}

int IsNonBlocking (long /*int*/ _retval) {
	/* blocking */
	XPCOM.memmove (_retval, new boolean[] {false});
	return XPCOM.NS_OK;
}		
}