/*
* JBoss, Home of Professional Open Source.
* Copyright 2014, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.remoting3.util;
import static org.xnio.Bits.allAreClear;
import static org.xnio.Bits.allAreSet;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* @author <a href="mailto:david.lloyd@redhat.com">David M. Lloyd</a>
*/
public final class StreamUtils {
public static int readInt8(InputStream is) throws IOException {
final int res = is.read();
if (res == -1) {
throw new EOFException();
}
return res;
}
public static int readInt16LE(InputStream is) throws IOException {
int a, b;
a = is.read();
if (a == -1) {
throw new EOFException();
}
b = is.read();
if (b == -1) {
throw new EOFException();
}
return a | b << 8;
}
public static int readInt16BE(InputStream is) throws IOException {
int a, b;
a = is.read();
if (a == -1) {
throw new EOFException();
}
b = is.read();
if (b == -1) {
throw new EOFException();
}
return b | a << 8;
}
public static int readInt24LE(InputStream is) throws IOException {
int a, b, c;
a = is.read();
if (a == -1) {
throw new EOFException();
}
b = is.read();
if (b == -1) {
throw new EOFException();
}
c = is.read();
if (c == -1) {
throw new EOFException();
}
return a | b << 8 | c << 16;
}
public static int readInt24BE(InputStream is) throws IOException {
int a, b, c;
a = is.read();
if (a == -1) {
throw new EOFException();
}
b = is.read();
if (b == -1) {
throw new EOFException();
}
c = is.read();
if (c == -1) {
throw new EOFException();
}
return c | b << 8 | a << 16;
}
public static int readInt32LE(InputStream is) throws IOException {
int a, b, c, d;
a = is.read();
if (a == -1) {
throw new EOFException();
}
b = is.read();
if (b == -1) {
throw new EOFException();
}
c = is.read();
if (c == -1) {
throw new EOFException();
}
d = is.read();
if (d == -1) {
throw new EOFException();
}
return a | b << 8 | c << 16 | d << 24;
}
public static int readInt32BE(InputStream is) throws IOException {
int a, b, c, d;
a = is.read();
if (a == -1) {
throw new EOFException();
}
b = is.read();
if (b == -1) {
throw new EOFException();
}
c = is.read();
if (c == -1) {
throw new EOFException();
}
d = is.read();
if (d == -1) {
throw new EOFException();
}
return d | c << 8 | b << 16 | a << 24;
}
public static void skipBytes(InputStream is, long skip) throws IOException {
long res;
while (skip > 0) {
res = is.skip(skip);
skip -= res;
if (res == 0) {
readInt8(is);
skip--;
}
}
}
public static int readPackedUnsignedInt31(InputStream is) throws IOException {
int t;
int res;
res = readInt8(is);
t = res & 0b0111_1111;
while (allAreSet(res, 0b1000_0000)) {
res = readInt8(is);
t = t << 7 | res & 0b0111_1111;
}
return t & 0x7fff_ffff;
}
public static int readPackedUnsignedInt32(InputStream is) throws IOException {
int t;
int res;
res = readInt8(is);
t = res & 0b0111_1111;
while (allAreSet(res, 0b1000_0000)) {
res = readInt8(is);
t = t << 7 | res & 0b0111_1111;
}
return t;
}
public static int readPackedSignedInt32(InputStream is) throws IOException {
int t;
int res;
res = readInt8(is);
t = res & 0b0111_1111;
if (allAreSet(t, 0b0100_0000)) {
// sign-extend first 6 bits
t |= 0b1111_1111_1100_0000;
}
if (allAreSet(res, 0b1000_0000)) {
do {
res = readInt8(is);
t = t << 7 | res & 0b0111_1111;
} while (allAreSet(res, 0b1000_0000));
}
return t;
}
// write
public static void writeInt8(OutputStream os, int val) throws IOException {
os.write(val);
}
public static void writeInt8(OutputStream os, long val) throws IOException {
writeInt8(os, (int) val);
}
public static void writeInt16LE(OutputStream os, int val) throws IOException {
os.write(val);
os.write(val >> 8);
}
public static void writeInt16LE(OutputStream os, long val) throws IOException {
writeInt16LE(os, (int) val);
}
public static void writeInt16BE(OutputStream os, int val) throws IOException {
os.write(val >> 8);
os.write(val);
}
public static void writeInt16BE(OutputStream os, long val) throws IOException {
writeInt16BE(os, (int) val);
}
public static void writeInt24LE(OutputStream os, int val) throws IOException {
os.write(val);
os.write(val >> 8);
os.write(val >> 16);
}
public static void writeInt24LE(OutputStream os, long val) throws IOException {
writeInt24LE(os, (int) val);
}
public static void writeInt24BE(OutputStream os, int val) throws IOException {
os.write(val >> 16);
os.write(val >> 8);
os.write(val);
}
public static void writeInt24BE(OutputStream os, long val) throws IOException {
writeInt24BE(os, (int) val);
}
public static void writeInt32LE(OutputStream os, int val) throws IOException {
os.write(val);
os.write(val >> 8);
os.write(val >> 16);
os.write(val >> 24);
}
public static void writeInt32LE(OutputStream os, long val) throws IOException {
writeInt32LE(os, (int) val);
}
public static void writeInt32BE(OutputStream os, int val) throws IOException {
os.write(val >> 24);
os.write(val >> 16);
os.write(val >> 8);
os.write(val);
}
public static void writeInt32BE(OutputStream os, long val) throws IOException {
writeInt32BE(os, (int) val);
}
public static void writePackedUnsignedInt31(OutputStream os, int val) throws IOException {
val &= 0x7fff_ffff;
while (32 - Integer.numberOfLeadingZeros(val) > 7) {
os.write(val | 0b1000_0000);
val >>>= 7;
}
assert allAreClear(val, 0b1000_0000);
os.write(val);
}
public static void writePackedUnsignedInt32(OutputStream os, int val) throws IOException {
while (32 - Integer.numberOfLeadingZeros(val) > 7) {
os.write(val | 0b1000_0000);
val >>>= 7;
}
assert allAreClear(val, 0b1000_0000);
os.write(val);
}
public static void readFully(final InputStream is, final byte[] bytes) throws IOException {
readFully(is, bytes, 0, bytes.length);
}
public static void readFully(final InputStream is, final byte[] bytes, final int off, final int len) throws IOException {
int t = is.read(bytes, off, len);
if (t == -1) throw new EOFException();
while (t < len) {
int res = is.read(bytes, off + t, len - t);
if (res == -1) throw new EOFException();
t += res;
}
}
}