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import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;
/**
* Convert lines into the canonical format, that is, terminate lines with the
* CRLF sequence.
*
* @author John Mani
*/
public class CRLFOutputStream extends FilterOutputStream {
protected int lastb = -1;
protected boolean atBOL = true; // at beginning of line?
private static final byte[] newline = { (byte) '\r', (byte) '\n' };
public CRLFOutputStream(OutputStream os) {
super(os);
}
public void write(int b) throws IOException {
if (b == '\r') {
writeln();
} else if (b == '\n') {
if (lastb != '\r')
writeln();
} else {
out.write(b);
atBOL = false;
}
lastb = b;
}
public void write(byte b[]) throws IOException {
write(b, 0, b.length);
}
public void write(byte b[], int off, int len) throws IOException {
int start = off;
len += off;
for (int i = start; i < len; i++) {
if (b[i] == '\r') {
out.write(b, start, i - start);
writeln();
start = i + 1;
} else if (b[i] == '\n') {
if (lastb != '\r') {
out.write(b, start, i - start);
writeln();
}
start = i + 1;
}
lastb = b[i];
}
if ((len - start) > 0) {
out.write(b, start, len - start);
atBOL = false;
}
}
/*
* Just write out a new line, something similar to out.println()
*/
public void writeln() throws IOException {
out.write(newline);
atBOL = true;
}
}
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