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  /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 package org.apache.commons.net.io;
 
This class wraps an input stream, replacing all singly occurring <LF> (linefeed) characters with <CR><LF> (carriage return followed by linefeed), which is the NETASCII standard for representing a newline. You would use this class to implement ASCII file transfers requiring conversion to NETASCII.

 
 
 public final class ToNetASCIIInputStream extends FilterInputStream
 {
     private static final int __NOTHING_SPECIAL = 0;
     private static final int __LAST_WAS_CR = 1;
     private static final int __LAST_WAS_NL = 2;
     private int __status;

    
Creates a ToNetASCIIInputStream instance that wraps an existing InputStream.

Parameters:
input The InputStream to wrap.
 
     public ToNetASCIIInputStream(InputStream input)
     {
         super(input);
          = ;
     }


    
Reads and returns the next byte in the stream. If the end of the message has been reached, returns -1.

Returns:
The next character in the stream. Returns -1 if the end of the stream has been reached.
Throws:
java.io.IOException If an error occurs while reading the underlying stream.
 
     @Override
     public int read() throws IOException
     {
         int ch;
 
         if ( == )
         {
              = ;
             return '\n';
         }
 
         ch = .read();
 
         switch (ch)
         {
         case '\r':
              = ;
             return '\r';
         case '\n':
             if ( != )
             {
                  = ;
                 return '\r';
             }
             //$FALL-THROUGH$
         default:
              = ;
             return ch;
         }
         // statement not reached
         //return ch;
     }


    
Reads the next number of bytes from the stream into an array and returns the number of bytes read. Returns -1 if the end of the stream has been reached.

Parameters:
buffer The byte array in which to store the data.
Returns:
The number of bytes read. Returns -1 if the end of the message has been reached.
Throws:
java.io.IOException If an error occurs in reading the underlying stream.
    @Override
    public int read(byte buffer[]) throws IOException
    {
        return read(buffer, 0, buffer.length);
    }


    
Reads the next number of bytes from the stream into an array and returns the number of bytes read. Returns -1 if the end of the message has been reached. The characters are stored in the array starting from the given offset and up to the length specified.

Parameters:
buffer The byte array in which to store the data.
offset The offset into the array at which to start storing data.
length The number of bytes to read.
Returns:
The number of bytes read. Returns -1 if the end of the stream has been reached.
Throws:
java.io.IOException If an error occurs while reading the underlying stream.
    @Override
    public int read(byte buffer[], int offsetint lengththrows IOException
    {
        int choff;
        if (length < 1) {
            return 0;
        }
        ch = available();
        if (length > ch) {
            length = ch;
        }
        // If nothing is available, block to read only one character
        if (length < 1) {
            length = 1;
        }
        if ((ch = read()) == -1) {
            return -1;
        }
        off = offset;
        do
        {
            buffer[offset++] = (byte)ch;
        }
        while (--length > 0 && (ch = read()) != -1);
        return (offset - off);
    }

    
Returns false. Mark is not supported. *
    @Override
    public boolean markSupported()
    {
        return false;
    }
    @Override
    public int available() throws IOException
    {
        int result;
        result = .available();
        if ( == ) {
            return (result + 1);
        }
        return result;
    }
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