org.bouncycastle.mail.smime.util.CRLFOutputStream Maven / Gradle / Ivy

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The Bouncy Castle Java APIs for doing S/MIME with the Jakarta Mail APIs. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified and used appropriately.

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package org.bouncycastle.mail.smime.util;

import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;

public class CRLFOutputStream extends FilterOutputStream
{
    protected int lastb;
    protected static byte newline[];

    public CRLFOutputStream(OutputStream outputstream)
    {
        super(outputstream);
        lastb = -1;
    }

    public void write(int i)
        throws IOException
    {
        if (i == '\r')
        {
            out.write(newline);
        }
        else if (i == '\n')
        {
            if (lastb != '\r')
            {
                out.write(newline);
            }
        }
        else
        {
           out.write(i);
        }
        
        lastb = i;
    }

    public void write(byte[] buf)
        throws IOException
    {
        this.write(buf, 0, buf.length);
    }

    public void write(byte buf[], int off, int len)
        throws IOException
    {
        for (int i = off; i != off + len; i++)
        {
            this.write(buf[i]);
        }
    }

    public void writeln()
        throws IOException
    {
        super.out.write(newline);
    }

    static 
    {
        newline = new byte[2];
        newline[0] = '\r';
        newline[1] = '\n';
    }
}