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/*
* Copyright (c) 2012, 2018, 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 vm.share;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
public class FileUtils {
private static ClassLoader cl = ClassLoader.getSystemClassLoader();
public static byte[] readFile(File f) throws IOException {
FileInputStream is = new FileInputStream(f);
try {
return readStream(is);
} finally {
is.close();
}
}
public static byte[] readClass(String name) throws IOException {
return readResource(name.replace('.', '/') + ".class");
}
public static byte[] readResource(String name) throws IOException {
InputStream is = FileUtils.cl.getResourceAsStream(name);
if (is == null)
throw new IOException("Can't read resource " + name);
try {
return readStream(is);
} finally {
is.close();
}
}
public static byte[] readStream(InputStream is) throws IOException {
byte buf[] = new byte[0xFFFF];
int offset = 0;
int r;
while ((r = is.read(buf, offset, buf.length - offset)) > 0)
offset += r;
return Arrays.copyOf(buf, offset);
}
public static void writeBytesToFile(File file, byte[] buf)
throws IOException {
FileOutputStream fos = new FileOutputStream(file);
try {
fos.write(buf);
} finally {
fos.close();
}
}
}
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