diff options
Diffstat (limited to 'org/apache/commons/net/io/FromNetASCIIInputStream.java')
| -rw-r--r-- | org/apache/commons/net/io/FromNetASCIIInputStream.java | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/org/apache/commons/net/io/FromNetASCIIInputStream.java b/org/apache/commons/net/io/FromNetASCIIInputStream.java deleted file mode 100644 index 76588ab..0000000 --- a/org/apache/commons/net/io/FromNetASCIIInputStream.java +++ /dev/null @@ -1,205 +0,0 @@ -/*
- * 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;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.PushbackInputStream;
-
-/***
- * This class wraps an input stream, replacing all occurrences
- * of <CR><LF> (carriage return followed by a linefeed),
- * which is the NETASCII standard for representing a newline, with the
- * local line separator representation. You would use this class to
- * implement ASCII file transfers requiring conversion from NETASCII.
- * <p>
- * <p>
- * @author Daniel F. Savarese
- ***/
-
-public final class FromNetASCIIInputStream extends PushbackInputStream
-{
- static final boolean _noConversionRequired;
- static final String _lineSeparator;
- static final byte[] _lineSeparatorBytes;
-
- static {
- _lineSeparator = System.getProperty("line.separator");
- _noConversionRequired = _lineSeparator.equals("\r\n");
- _lineSeparatorBytes = _lineSeparator.getBytes();
- }
-
- private int __length = 0;
-
- /***
- * Returns true if the NetASCII line separator differs from the system
- * line separator, false if they are the same. This method is useful
- * to determine whether or not you need to instantiate a
- * FromNetASCIIInputStream object.
- * <p>
- * @return True if the NETASCII line separator differs from the local
- * system line separator, false if they are the same.
- ***/
- public static final boolean isConversionRequired()
- {
- return !_noConversionRequired;
- }
-
- /***
- * Creates a FromNetASCIIInputStream instance that wraps an existing
- * InputStream.
- ***/
- public FromNetASCIIInputStream(InputStream input)
- {
- super(input, _lineSeparatorBytes.length + 1);
- }
-
-
- private int __read() throws IOException
- {
- int ch;
-
- ch = super.read();
-
- if (ch == '\r')
- {
- ch = super.read();
- if (ch == '\n')
- {
- unread(_lineSeparatorBytes);
- ch = super.read();
- // This is a kluge for read(byte[], ...) to read the right amount
- --__length;
- }
- else
- {
- if (ch != -1)
- unread(ch);
- return '\r';
- }
- }
-
- return ch;
- }
-
-
- /***
- * Reads and returns the next byte in the stream. If the end of the
- * message has been reached, returns -1. Note that a call to this method
- * may result in multiple reads from the underlying input stream in order
- * to convert NETASCII line separators to the local line separator format.
- * This is transparent to the programmer and is only mentioned for
- * completeness.
- * <p>
- * @return The next character in the stream. Returns -1 if the end of the
- * stream has been reached.
- * @exception IOException If an error occurs while reading the underlying
- * stream.
- ***/
- @Override
- public int read() throws IOException
- {
- if (_noConversionRequired)
- return super.read();
-
- return __read();
- }
-
-
- /***
- * 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.
- * <p>
- * @param buffer The byte array in which to store the data.
- * @return The number of bytes read. Returns -1 if the
- * end of the message has been reached.
- * @exception 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.
- * <p>
- * @param buffer The byte array in which to store the data.
- * @param offset The offset into the array at which to start storing data.
- * @param length The number of bytes to read.
- * @return The number of bytes read. Returns -1 if the
- * end of the stream has been reached.
- * @exception IOException If an error occurs while reading the underlying
- * stream.
- ***/
- @Override
- public int read(byte buffer[], int offset, int length) throws IOException
- {
- int ch, off;
-
- if (length < 1)
- return 0;
-
- ch = available();
-
- __length = (length > ch ? ch : length);
-
- // If nothing is available, block to read only one character
- if (__length < 1)
- __length = 1;
-
- if (_noConversionRequired)
- return super.read(buffer, offset, __length);
-
- if ((ch = __read()) == -1)
- return -1;
-
- off = offset;
-
- do
- {
- buffer[offset++] = (byte)ch;
- }
- while (--__length > 0 && (ch = __read()) != -1);
-
-
- return (offset - off);
- }
-
-
- // PushbackInputStream in JDK 1.1.3 returns the wrong thing
- /***
- * Returns the number of bytes that can be read without blocking EXCEPT
- * when newline conversions have to be made somewhere within the
- * available block of bytes. In other words, you really should not
- * rely on the value returned by this method if you are trying to avoid
- * blocking.
- ***/
- @Override
- public int available() throws IOException
- {
- return (buf.length - pos) + in.available();
- }
-
-}
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