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Diffstat (limited to 'libjava/gnu/java/nio/charset/UTF_16Decoder.java')
| -rw-r--r-- | libjava/gnu/java/nio/charset/UTF_16Decoder.java | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/libjava/gnu/java/nio/charset/UTF_16Decoder.java b/libjava/gnu/java/nio/charset/UTF_16Decoder.java deleted file mode 100644 index ddcea88dd36..00000000000 --- a/libjava/gnu/java/nio/charset/UTF_16Decoder.java +++ /dev/null @@ -1,151 +0,0 @@ -/* UTF_16Decoder.java -- - Copyright (C) 2002 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath 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 for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - -package gnu.java.nio.charset; - -import java.nio.ByteBuffer; -import java.nio.CharBuffer; -import java.nio.charset.Charset; -import java.nio.charset.CharsetDecoder; -import java.nio.charset.CoderResult; - -/** - * Decoder for UTF-16, UTF-15LE, and UTF-16BE. - * - * @author Jesse Rosenstock - */ -final class UTF_16Decoder extends CharsetDecoder -{ - // byte orders - static final int BIG_ENDIAN = 0; - static final int LITTLE_ENDIAN = 1; - static final int UNKNOWN_ENDIAN = 2; - - private static final char BYTE_ORDER_MARK = '\uFEFF'; - private static final char REVERSED_BYTE_ORDER_MARK = '\uFFFE'; - - private final int originalByteOrder; - private int byteOrder; - - UTF_16Decoder (Charset cs, int byteOrder) - { - super (cs, 0.5f, 1.0f); - this.originalByteOrder = byteOrder; - this.byteOrder = byteOrder; - } - - protected CoderResult decodeLoop (ByteBuffer in, CharBuffer out) - { - // TODO: Optimize this in the case in.hasArray() / out.hasArray() - - int inPos = in.position (); - try - { - while (in.remaining () >= 2) - { - byte b1 = in.get (); - byte b2 = in.get (); - - // handle byte order mark - if (byteOrder == UNKNOWN_ENDIAN) - { - char c = (char) ((b1 << 8) | b2); - if (c == BYTE_ORDER_MARK) - { - byteOrder = BIG_ENDIAN; - inPos += 2; - continue; - } - else if (c == REVERSED_BYTE_ORDER_MARK) - { - byteOrder = LITTLE_ENDIAN; - inPos += 2; - continue; - } - else - { - // assume big endian, do not consume bytes, - // continue with normal processing - byteOrder = BIG_ENDIAN; - } - } - - char c = byteOrder == BIG_ENDIAN ? (char) ((b1 << 8) | b2) - : (char) ((b2 << 8) | b1); - - if (0xD800 <= c && c <= 0xDFFF) - { - // c is a surrogate - - // make sure c is a high surrogate - if (c > 0xDBFF) - return CoderResult.malformedForLength (2); - if (in.remaining () < 2) - return CoderResult.UNDERFLOW; - byte b3 = in.get (); - byte b4 = in.get (); - char d = byteOrder == BIG_ENDIAN ? (char) ((b3 << 8) | b4) - : (char) ((b4 << 8) | b3); - // make sure d is a low surrogate - if (d < 0xDC00 || d > 0xDFFF) - return CoderResult.malformedForLength (2); - out.put (c); - out.put (d); - inPos += 4; - } - else - { - if (!out.hasRemaining ()) - return CoderResult.UNDERFLOW; - out.put (c); - inPos += 2; - } - } - - return CoderResult.UNDERFLOW; - } - finally - { - in.position (inPos); - } - } - - protected void implReset () - { - byteOrder = originalByteOrder; - } -} |