Introduce mbox support

[gpl/argeo-slc.git] / ext / javax.mail.mbox / src / com / sun / mail / mbox / NewlineOutputStream.java

diff --git a/ext/javax.mail.mbox/src/com/sun/mail/mbox/NewlineOutputStream.java b/ext/javax.mail.mbox/src/com/sun/mail/mbox/NewlineOutputStream.java
new file mode 100644 (file)
index 0000000..f4a31cb
--- /dev/null
+++ b/ext/javax.mail.mbox/src/com/sun/mail/mbox/NewlineOutputStream.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0, which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * This Source Code may also be made available under the following Secondary
+ * Licenses when the conditions for such availability set forth in the
+ * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
+ * version 2 with the GNU Classpath Exception, which is available at
+ * https://www.gnu.org/software/classpath/license.html.
+ *
+ * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
+ */
+
+package com.sun.mail.mbox;
+
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+
+/**
+ * Convert the various newline conventions to the local platform's
+ * newline convention.  Optionally, make sure the output ends with
+ * a blank line.
+ */
+public class NewlineOutputStream extends FilterOutputStream {
+    private int lastb = -1;
+    private int bol = 1; // number of times in a row we're at beginning of line
+    private final boolean endWithBlankLine;
+    private static final byte[] newline;
+
+    static {
+       String s = null;
+       try {
+           s = System.lineSeparator();
+       } catch (SecurityException sex) {
+           // ignore, should never happen
+       }
+       if (s == null || s.length() <= 0)
+           s = "\n";
+       newline = s.getBytes(StandardCharsets.ISO_8859_1);
+    }
+
+    public NewlineOutputStream(OutputStream os) {
+       this(os, false);
+    }
+
+    public NewlineOutputStream(OutputStream os, boolean endWithBlankLine) {
+       super(os);
+       this.endWithBlankLine = endWithBlankLine;
+    }
+
+    public void write(int b) throws IOException {
+       if (b == '\r') {
+           out.write(newline);
+           bol++;
+       } else if (b == '\n') {
+           if (lastb != '\r') {
+               out.write(newline);
+               bol++;
+           }
+       } else {
+           out.write(b);
+           bol = 0;    // no longer at beginning of line
+       }
+       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 {
+       for (int i = 0 ; i < len ; i++) {
+           write(b[off + i]);
+       }
+    }
+
+    public void flush() throws IOException {
+       if (endWithBlankLine) {
+           if (bol == 0) {
+               // not at bol, return to bol and add a blank line
+               out.write(newline);
+               out.write(newline);
+           } else if (bol == 1) {
+               // at bol, add a blank line
+               out.write(newline);
+           }
+       }
+       bol = 2;
+       out.flush();
+    }
+}