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/*******************************************************************************
* Copyright (c) 2009, 2011 Wind River Systems, Inc. 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.internal.debug.ui.launch.setup;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
abstract class AbstractRemoteShell implements IRemoteShell {
protected boolean debug;
protected BufferedReader inp;
protected PrintWriter out;
public void setDebug(boolean debug) {
this.debug = debug;
}
public synchronized void write(String s) {
out.write(s);
}
public synchronized void expect(String s) throws IOException {
expect(new String[]{ s });
}
public synchronized int expect(String s[]) throws IOException {
out.flush();
int[] pos = new int[s.length];
for (int i = 0; i < pos.length; i++) pos[i] = 0;
StringBuffer buf = new StringBuffer();
try {
for (;;) {
int ch = inp.read();
if (ch < 0) throw new IOException("Unexpected EOF");
if (ch == '\r') continue;
if (debug) System.out.write(ch);
for (int i = 0; i < pos.length; i++) {
String p = s[i];
if (ch == p.charAt(pos[i])) {
pos[i]++;
if (pos[i] == p.length()) return i;
}
else {
int nps = pos[i];
while (nps > 0) {
if (ch == p.charAt(nps - 1)) {
int j = nps - 2;
int k = pos[i] - 1;
while (j >= 0 && p.charAt(j) == p.charAt(k)) {
j--;
k--;
}
if (j < 0) break;
}
nps--;
}
pos[i] = nps;
}
}
buf.append((char)ch);
if (ch == '\n') buf.setLength(0);
}
}
catch (IOException x) {
if (buf.length() == 0) throw x;
IOException y = new IOException("I/O error, last text received: " + buf);
y.initCause(x);
throw y;
}
finally {
if (debug) System.out.flush();
}
}
public synchronized String waitPrompt() throws IOException {
StringBuffer res = new StringBuffer();
StringBuffer buf = new StringBuffer();
out.flush();
try {
for (;;) {
int ch = inp.read();
if (ch < 0) throw new IOException("Unexpected EOF");
if (ch == '\r') continue;
if (debug) System.out.write(ch);
buf.append((char)ch);
if (buf.length() == PROMPT.length() && buf.toString().equals(PROMPT)) break;
if (ch == '\n') {
res.append(buf);
buf.setLength(0);
}
}
return res.toString();
}
catch (IOException x) {
if (buf.length() == 0) throw x;
IOException y = new IOException("I/O error, last text received: " + buf);
y.initCause(x);
throw y;
}
finally {
if (debug) System.out.flush();
}
}
}
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