01: /*
02: * Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04: *
05: * This code is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU General Public License version 2 only, as
07: * published by the Free Software Foundation. Sun designates this
08: * particular file as subject to the "Classpath" exception as provided
09: * by Sun in the LICENSE file that accompanied this code.
10: *
11: * This code is distributed in the hope that it will be useful, but WITHOUT
12: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14: * version 2 for more details (a copy is included in the LICENSE file that
15: * accompanied this code).
16: *
17: * You should have received a copy of the GNU General Public License version
18: * 2 along with this work; if not, write to the Free Software Foundation,
19: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20: *
21: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22: * CA 95054 USA or visit www.sun.com if you need additional information or
23: * have any questions.
24: */
25:
26: /**
27: * This FilterWriter class takes an existing Writer and uses
28: * the 'back-tick U' escape notation to escape characters which are
29: * encountered within the input character based stream which
30: * are outside the 7-bit ASCII range. The native platforms linefeed
31: * character is emitted for each line of processed input
32: */package sun.tools.native2ascii;
33:
34: import java.io.*;
35: import java.nio.BufferOverflowException;
36:
37: class N2AFilter extends FilterWriter {
38:
39: public N2AFilter(Writer out) {
40: super (out);
41: }
42:
43: public void write(char b) throws IOException {
44: char[] buf = new char[1];
45: buf[0] = (char) b;
46: write(buf, 0, 1);
47: }
48:
49: public void write(char[] buf, int off, int len) throws IOException {
50:
51: String lineBreak = System.getProperty("line.separator");
52:
53: //System.err.println ("xx Out buffer length is " + buf.length );
54: for (int i = 0; i < len; i++) {
55: if ((buf[i] > '\u007f')) {
56: // write \udddd
57: out.write('\\');
58: out.write('u');
59: String hex = Integer.toHexString(buf[i]);
60: StringBuffer hex4 = new StringBuffer(hex);
61: hex4.reverse();
62: int length = 4 - hex4.length();
63: for (int j = 0; j < length; j++) {
64: hex4.append('0');
65: }
66: for (int j = 0; j < 4; j++) {
67: out.write(hex4.charAt(3 - j));
68: }
69: } else
70: out.write(buf[i]);
71: }
72: }
73: }
|