/**************************************************************************
* Copyright (c) 2001 by Punch Telematix. All rights reserved. *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions *
* are met: *
* 1. Redistributions of source code must retain the above copyright *
* notice, this list of conditions and the following disclaimer. *
* 2. Redistributions in binary form must reproduce the above copyright *
* notice, this list of conditions and the following disclaimer in the *
* documentation and/or other materials provided with the distribution. *
* 3. Neither the name of Punch Telematix nor the names of *
* other contributors may be used to endorse or promote products *
* derived from this software without specific prior written permission.*
* *
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED *
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF *
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. *
* IN NO EVENT SHALL PUNCH TELEMATIX OR OTHER CONTRIBUTORS BE LIABLE *
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR *
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF *
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR *
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, *
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE *
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN *
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
**************************************************************************/
/*
** $Id: DataInputStream.java,v 1.2 2005/11/29 10:20:16 cvs Exp $
*/
package java.io;
import wonka.vm.ArrayUtil;
public class DataInputStream extends FilterInputStream implements DataInput {
/**
** TODO checks for this condition ...
*/
private boolean lastWasReturn = false;
private byte[] buffer = new byte[8];
public DataInputStream(InputStream input) {
super(input);
}
public final int read(byte[] bytes) throws java.io.IOException {
return read(bytes, 0, bytes.length);
}
public final int read(byte[] bytes, int offset, int length) throws java.io.IOException {
if(lastWasReturn){
int rd = in.read();
if(rd == -1){
return -1;
}
if(rd == '\n'){
return in.read(bytes, offset, length);
}
bytes[offset++] = (byte)rd;
if(in.available() > 0){
return in.read(bytes, offset, length-1);
}
return 1;
}
return in.read(bytes, offset, length);
}
public final void readFully(byte[] b) throws IOException {
readFully(b, 0, b.length);
}
public final void readFully(byte[] b, int off, int len) throws IOException {
int done = 0;
do {
int read = in.read(b, off+done, len-done);
if(read < 0){
throw new EOFException();
}
done += read;
} while(done < len);
}
public final int skipBytes(int n) throws IOException {
int done = 0;
while(done < n){
int skipped = (int)in.skip(n-done);
if(skipped == 0){
throw new EOFException();
}
done += skipped;
}
return done;
}
public final boolean readBoolean() throws IOException {
int next = in.read();
if (next == -1){
throw new EOFException();
}
return (next > 0);
}
public final byte readByte() throws IOException {
int next = in.read();
if (next == -1){
throw new EOFException();
}
return (byte)next;
}
public final int readUnsignedByte() throws IOException {
int next = in.read();
if (next == -1){
throw new EOFException();
}
return next;
}
public final short readShort() throws IOException {
return (short)readUnsignedShort();
}
public final int readUnsignedShort() throws IOException {
int read = in.read(this.buffer, 0, 2);
if(read == 1){
read = in.read(buffer, 1, 1);
}
if (read == -1) {
throw new EOFException();
}
return ((this.buffer[0] & 0xff) << 8) | (this.buffer[1] & 0xff);
}
public final char readChar() throws IOException {
return (char) readUnsignedShort();
}
public final int readInt() throws IOException {
readFully(buffer, 0, 4);
return ArrayUtil.bArrayToI(buffer,0);
}
public final long readLong() throws IOException {
readFully(buffer, 0, 8);
return ArrayUtil.bArrayToL(buffer,0);
}
public final float readFloat() throws IOException {
readFully(buffer, 0, 4);
return ArrayUtil.bArrayToF(buffer,0);
}
public final double readDouble() throws IOException {
readFully(buffer, 0, 8);
return ArrayUtil.bArrayToD(buffer,0);
}
public final String readLine() throws IOException {
StringBuffer result = new StringBuffer();
while(true) {
int next = in.read();
if (next == -1){
if(result.length() == 0){
return null;
}
break;
}
if (next == '\r') {
lastWasReturn = true;
break;
}
if (next == '\n') {
if(!lastWasReturn) {
break;
}
continue;
}
result.append((char)(next & 0xff));
lastWasReturn = false;
}
return result.toString();
}
public final String readUTF() throws IOException {
int UTFlength = readUnsignedShort();
if (UTFlength < 0){
throw new UTFDataFormatException();
}
byte[] bytes = new byte[UTFlength];
readFully(bytes);
return new String(bytes,"UTF8");
}
public static final String readUTF(DataInput in) throws IOException {
int UTFlength = in.readUnsignedShort();
if (UTFlength < 0){
throw new UTFDataFormatException();
}
byte[] bytes = new byte[UTFlength];
in.readFully(bytes);
return new String(bytes,"UTF8");
}
}