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/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package jdk.testlibrary;
/**
* Defines useful I/O methods.
*/
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
public final class IOUtils {
/*
* Prevent instantiation.
*/
private IOUtils() {}
/**
* Read all bytes from <code>in</code>
* until EOF is detected.
* @param in input stream, must not be null
* @return bytes read
* @throws IOException Any IO error.
*/
public static byte[] readFully(InputStream is) throws IOException {
byte[] output = {};
int pos = 0;
while (true) {
int bytesToRead;
if (pos >= output.length) { // Only expand when there's no room
bytesToRead = output.length + 1024;
if (output.length < pos + bytesToRead) {
output = Arrays.copyOf(output, pos + bytesToRead);
}
} else {
bytesToRead = output.length - pos;
}
int cc = is.read(output, pos, bytesToRead);
if (cc < 0) {
if (output.length != pos) {
output = Arrays.copyOf(output, pos);
}
break;
}
pos += cc;
}
return output;
}
}
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