--- a/jdk/src/jdk.dev/share/classes/sun/tools/native2ascii/A2NFilter.java Fri May 22 10:45:59 2015 -0700
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,144 +0,0 @@
-/*
- * Copyright (c) 2001, 2005, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-/**
- * This FilterReader class processes a sequence of characters from
- * a source stream containing a mixture of 7-bit ASCII data and
- * 'back-tick U' escaped sequences representing characters which have
- * the possibility of being encoded in a user specified encoding
- * The filter relies on knowing the target encoding and makes a
- * determination as to whether a given supplied character in its
- * source character stream is encodeable in the target encoding.
- * If not, it is remains in its back-tick U escaped form.
- */
-
-package sun.tools.native2ascii;
-import java.io.*;
-
-
-class A2NFilter extends FilterReader {
-
- // maintain a trailing buffer to hold any incompleted
- // unicode escaped sequences
- private char[] trailChars = null;
-
- public A2NFilter(Reader in) {
- super(in);
- }
-
- public int read(char[] buf, int off, int len) throws IOException {
- int numChars = 0; // how many characters have been read
- int retChars = 0; // how many characters we'll return
-
- char[] cBuf = new char[len];
- int cOffset = 0; // offset at which we'll start reading
- boolean eof = false;
-
- // copy trailing chars from previous invocation to input buffer
- if (trailChars != null) {
- for (int i = 0; i < trailChars.length; i++)
- cBuf[i] = trailChars[i];
- numChars = trailChars.length;
- trailChars = null;
- }
-
- int n = in.read(cBuf, numChars, len - numChars);
- if (n < 0) {
- eof = true;
- if (numChars == 0)
- return -1; // EOF;
- } else {
- numChars += n;
- }
-
- for (int i = 0; i < numChars;) {
- char c = cBuf[i++];
-
- if (c != '\\' || (eof && numChars <= 5)) {
- // Not a backslash, so copy and continue
- // Always pass non backslash chars straight thru
- // for regular encoding. If backslash occurs in
- // input stream at the final 5 chars then don't
- // attempt to read-ahead and de-escape since these
- // are literal occurrences of U+005C which need to
- // be encoded verbatim in the target encoding.
- buf[retChars++] = c;
- continue;
- }
-
- int remaining = numChars - i;
- if (remaining < 5) {
- // Might be the first character of a unicode escape, but we
- // don't have enough characters to tell, so save it and finish
- trailChars = new char[1 + remaining];
- trailChars[0] = c;
- for (int j = 0; j < remaining; j++)
- trailChars[1 + j] = cBuf[i + j];
- break;
- }
- // At this point we have at least five characters remaining
-
- c = cBuf[i++];
- if (c != 'u') {
- // Not a unicode escape, so copy and continue
- buf[retChars++] = '\\';
- buf[retChars++] = c;
- continue;
- }
-
- // The next four characters are the hex part of a unicode escape
- char rc = 0;
- boolean isUE = true;
- try {
- rc = (char)Integer.parseInt(new String(cBuf, i, 4), 16);
- } catch (NumberFormatException x) {
- isUE = false;
- }
- if (isUE && Main.canConvert(rc)) {
- // We'll be able to convert this
- buf[retChars++] = rc;
- i += 4; // Align beyond the current uXXXX sequence
- } else {
- // We won't, so just retain the original sequence
- buf[retChars++] = '\\';
- buf[retChars++] = 'u';
- continue;
- }
-
- }
-
- return retChars;
- }
-
- public int read() throws IOException {
- char[] buf = new char[1];
-
- if (read(buf, 0, 1) == -1)
- return -1;
- else
- return (int)buf[0];
- }
-
-}