/*
* MixedEndianDataOutputStream.java
*
* Created on March 28, 2007, 10:10 PM
*
*/
package edu.oregonstate.cartography.geometryexport;
import java.io.*;
/**
*
* @author Bernhard Jenny, Institute of Cartography, ETH Zurich
*/
public class MixedEndianDataOutputStream extends DataOutputStream {
/**
* Creates a new mixed endian output stream and chains it to the
* output stream specified by the out argument.
*
* @param out the underlying output stream.
* @see java.io.FilterOutputStream#out
*/
public MixedEndianDataOutputStream(OutputStream out) {
super(out);
}
/**
* Writes a two byte <code>short</code> to the underlying output stream in
* little endian order, low byte first.
*
* @param s the <code>short</code> to be written.
* @exception IOException if the underlying stream throws an IOException.
*/
public void writeLittleEndianShort(int s) throws IOException {
out.write(s & 0xFF);
out.write((s >>> 8) & 0xFF);
written += 2;
}
/**
* Writes a two byte <code>char</code> to the underlying output stream
* in little endian order, low byte first.
*
* @param c the <code>char</code> value to be written.
* @exception IOException if the underlying stream throws an IOException.
*/
public void writeLittleEndianChar(int c) throws IOException {
out.write(c & 0xFF);
out.write((c >>> 8) & 0xFF);
written += 2;
}
/**
* Writes a four-byte <code>int</code> to the underlying output stream
* in little endian order, low byte first, high byte last
*
* @param i the <code>int</code> to be written.
* @exception IOException if the underlying stream throws an IOException.
*/
public void writeLittleEndianInt(int i) throws IOException {
out.write(i & 0xFF);
out.write((i >>> 8) & 0xFF);
out.write((i >>> 16) & 0xFF);
out.write((i >>> 24) & 0xFF);
written += 4;
}
/**
* Writes an eight-byte <code>long</code> to the underlying output stream
* in little endian order, low byte first, high byte last
*
* @param l the <code>long</code> to be written.
* @exception IOException if the underlying stream throws an IOException.
*/
public void writeLittleEndianLong(long l) throws IOException {
out.write((int) l & 0xFF);
out.write((int) (l >>> 8) & 0xFF);
out.write((int) (l >>> 16) & 0xFF);
out.write((int) (l >>> 24) & 0xFF);
out.write((int) (l >>> 32) & 0xFF);
out.write((int) (l >>> 40) & 0xFF);
out.write((int) (l >>> 48) & 0xFF);
out.write((int) (l >>> 56) & 0xFF);
written += 8;
}
/**
* Writes a 4 byte Java float to the underlying output stream in
* little endian order.
*
* @param f the <code>float</code> value to be written.
* @exception IOException if an I/O error occurs.
*/
public final void writeLittleEndianFloat(float f) throws IOException {
this.writeLittleEndianInt(Float.floatToIntBits(f));
}
/**
* Writes an 8 byte Java double to the underlying output stream in
* little endian order.
*
* @param d the <code>double</code> value to be written.
* @exception IOException if an I/O error occurs.
*/
public final void writeLittleEndianDouble(double d) throws IOException {
this.writeLittleEndianLong(Double.doubleToLongBits(d));
}
/**
* Writes a string to the underlying output stream as a sequence of
* characters. Each character is written to the data output stream as
* if by the <code>writeChar</code> method.
*
* @param s a <code>String</code> value to be written.
* @exception IOException if the underlying stream throws an IOException.
* @see java.io.LittleEndianOutputStream#writeChar(int)
* @see java.io.LittleEndianOutputStream#out
*/
public void writeLittleEndianChars(String s) throws IOException {
int length = s.length();
for (int i = 0; i < length; i++) {
int c = s.charAt(i);
out.write(c & 0xFF);
out.write((c >>> 8) & 0xFF);
}
written += length * 2;
}
/**
* Writes a string of no more than 65,535 characters
* to the underlying output stream using UTF-8
* encoding. This method first writes a two byte short
* in <b>big</b> endian order as required by the
* UTF-8 specification. This gives the number of bytes in the
* UTF-8 encoded version of the string, not the number of characters
* in the string. Next each character of the string is written
* using the UTF-8 encoding for the character.
*
* @param s the string to be written.
* @exception UTFDataFormatException if the string is longer than
* 65,535 characters.
* @exception IOException if the underlying stream throws an IOException.
*/
public void writeLittleEndianUTF(String s) throws IOException {
int numchars = s.length();
int numbytes = 0;
for (int i = 0 ; i < numchars ; i++) {
int c = s.charAt(i);
if ((c >= 0x0001) && (c <= 0x007F)) numbytes++;
else if (c > 0x07FF) numbytes += 3;
else numbytes += 2;
}
if (numbytes > 65535) throw new UTFDataFormatException();
out.write((numbytes >>> 8) & 0xFF);
out.write(numbytes & 0xFF);
for (int i = 0 ; i < numchars ; i++) {
int c = s.charAt(i);
if ((c >= 0x0001) && (c <= 0x007F)) {
out.write(c);
} else if (c > 0x07FF) {
out.write(0xE0 | ((c >> 12) & 0x0F));
out.write(0x80 | ((c >> 6) & 0x3F));
out.write(0x80 | (c & 0x3F));
written += 2;
} else {
out.write(0xC0 | ((c >> 6) & 0x1F));
out.write(0x80 | (c & 0x3F));
written += 1;
}
}
written += numchars + 2;
}
}