82 lines
2.5 KiB
Java
82 lines
2.5 KiB
Java
/*
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* Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package vm.share;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.Arrays;
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public class FileUtils {
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private static ClassLoader cl = ClassLoader.getSystemClassLoader();
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public static byte[] readFile(File f) throws IOException {
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FileInputStream is = new FileInputStream(f);
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try {
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return readStream(is);
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} finally {
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is.close();
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}
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}
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public static byte[] readClass(String name) throws IOException {
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return readResource(name.replace('.', '/') + ".class");
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}
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public static byte[] readResource(String name) throws IOException {
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InputStream is = FileUtils.cl.getResourceAsStream(name);
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if (is == null)
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throw new IOException("Can't read resource " + name);
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try {
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return readStream(is);
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} finally {
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is.close();
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}
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}
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public static byte[] readStream(InputStream is) throws IOException {
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byte buf[] = new byte[0xFFFF];
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int offset = 0;
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int r;
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while ((r = is.read(buf, offset, buf.length - offset)) > 0)
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offset += r;
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return Arrays.copyOf(buf, offset);
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}
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public static void writeBytesToFile(File file, byte[] buf)
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throws IOException {
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FileOutputStream fos = new FileOutputStream(file);
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try {
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fos.write(buf);
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} finally {
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fos.close();
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}
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}
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}
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