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/*******************************************************************************
* Copyright (c) 2003, 2004 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.mozilla.*;
class InputStream {
XPCOMObject inputStream;
int refCount = 0;
byte[] buffer;
int index = 0;
public 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 int method0(int[] args) {return queryInterface(args[0], args[1]);}
public int method1(int[] args) {return AddRef();}
public int method2(int[] args) {return Release();}
public int method3(int[] args) {return Close();}
public int method4(int[] args) {return Available(args[0]);}
public int method5(int[] args) {return Read(args[0], args[1], args[2]);}
public int method6(int[] args) {return ReadSegments(args[0], args[1], args[2], args[3]);}
public int method7(int[] args) {return IsNonBlocking(args[0]);}
};
}
void disposeCOMInterfaces() {
if (inputStream != null) {
inputStream.dispose();
inputStream = null;
}
}
int getAddress() {
return inputStream.getAddress();
}
int queryInterface(int riid, 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 int[] {inputStream.getAddress()}, 4);
AddRef();
return XPCOM.NS_OK;
}
if (guid.Equals(nsIInputStream.NS_IINPUTSTREAM_IID)) {
XPCOM.memmove(ppvObject, new int[] {inputStream.getAddress()}, 4);
AddRef();
return XPCOM.NS_OK;
}
XPCOM.memmove(ppvObject, new int[] {0}, 4);
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(int _retval) {
int available = buffer == null ? 0 : buffer.length - index;
XPCOM.memmove(_retval, new int[] {available}, 4);
return XPCOM.NS_OK;
}
int Read(int aBuf, int aCount, 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(int aWriter, int aClosure, int aCount, int _retval) {
int max = Math.min(aCount, buffer == null ? 0 : buffer.length - index);
int cnt = max;
while (cnt > 0) {
int[] aWriteCount = new int[1];
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(int _retval) {
/* blocking */
XPCOM.memmove(_retval, new int[] {0}, 4);
return XPCOM.NS_OK;
}
}
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