diff options
Diffstat (limited to 'app/src/main/java/org/apache/commons/net/io/ToNetASCIIOutputStream.java')
| -rw-r--r-- | app/src/main/java/org/apache/commons/net/io/ToNetASCIIOutputStream.java | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/app/src/main/java/org/apache/commons/net/io/ToNetASCIIOutputStream.java b/app/src/main/java/org/apache/commons/net/io/ToNetASCIIOutputStream.java new file mode 100644 index 0000000..aeacc98 --- /dev/null +++ b/app/src/main/java/org/apache/commons/net/io/ToNetASCIIOutputStream.java @@ -0,0 +1,119 @@ +/*
+ * 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.FilterOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+/***
+ * This class wraps an output 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.
+ * <p>
+ * <p>
+ * @author Daniel F. Savarese
+ ***/
+
+public final class ToNetASCIIOutputStream extends FilterOutputStream
+{
+ private boolean __lastWasCR;
+
+ /***
+ * Creates a ToNetASCIIOutputStream instance that wraps an existing
+ * OutputStream.
+ * <p>
+ * @param output The OutputStream to wrap.
+ ***/
+ public ToNetASCIIOutputStream(OutputStream output)
+ {
+ super(output);
+ __lastWasCR = false;
+ }
+
+
+ /***
+ * Writes a byte to the stream. Note that a call to this method
+ * may result in multiple writes to the underlying input stream in order
+ * to convert naked newlines to NETASCII line separators.
+ * This is transparent to the programmer and is only mentioned for
+ * completeness.
+ * <p>
+ * @param ch The byte to write.
+ * @exception IOException If an error occurs while writing to the underlying
+ * stream.
+ ***/
+ @Override
+ public synchronized void write(int ch)
+ throws IOException
+ {
+ switch (ch)
+ {
+ case '\r':
+ __lastWasCR = true;
+ out.write('\r');
+ return ;
+ case '\n':
+ if (!__lastWasCR)
+ out.write('\r');
+ // Fall through
+ default:
+ __lastWasCR = false;
+ out.write(ch);
+ return ;
+ }
+ }
+
+
+ /***
+ * Writes a byte array to the stream.
+ * <p>
+ * @param buffer The byte array to write.
+ * @exception IOException If an error occurs while writing to the underlying
+ * stream.
+ ***/
+ @Override
+ public synchronized void write(byte buffer[])
+ throws IOException
+ {
+ write(buffer, 0, buffer.length);
+ }
+
+
+ /***
+ * Writes a number of bytes from a byte array to the stream starting from
+ * a given offset.
+ * <p>
+ * @param buffer The byte array to write.
+ * @param offset The offset into the array at which to start copying data.
+ * @param length The number of bytes to write.
+ * @exception IOException If an error occurs while writing to the underlying
+ * stream.
+ ***/
+ @Override
+ public synchronized void write(byte buffer[], int offset, int length)
+ throws IOException
+ {
+ while (length-- > 0)
+ write(buffer[offset++]);
+ }
+
+}
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