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src/java.base/share/classes/java/lang/StringDecoderUTF8.java

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   1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.lang;
  27 
  28 import java.nio.charset.Charset;
  29 import java.util.Arrays;
  30 
  31 import static java.lang.String.LATIN1;
  32 import static java.lang.String.UTF16;
  33 import static java.lang.String.COMPACT_STRINGS;
  34 import static java.lang.Character.isSurrogate;
  35 import static java.lang.Character.highSurrogate;
  36 import static java.lang.Character.lowSurrogate;
  37 import static java.lang.Character.isSupplementaryCodePoint;
  38 import static java.lang.StringUTF16.putChar;
  39 
  40 class StringDecoderUTF8 extends StringCoding.StringDecoder {
  41 
  42     StringDecoderUTF8(Charset cs, String rcn) {
  43         super(cs, rcn);
  44     }
  45 
  46     private static boolean isNotContinuation(int b) {
  47         return (b & 0xc0) != 0x80;
  48     }
  49 
  50     private static boolean isMalformed3(int b1, int b2, int b3) {
  51         return (b1 == (byte)0xe0 && (b2 & 0xe0) == 0x80) ||
  52                (b2 & 0xc0) != 0x80 || (b3 & 0xc0) != 0x80;
  53     }
  54 
  55     private static boolean isMalformed3_2(int b1, int b2) {
  56         return (b1 == (byte)0xe0 && (b2 & 0xe0) == 0x80) ||
  57                (b2 & 0xc0) != 0x80;
  58     }


   1 /*
   2  * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.lang;
  27 
  28 import java.nio.charset.Charset;
  29 import java.util.Arrays;
  30 
  31 import static java.lang.String.LATIN1;
  32 import static java.lang.String.UTF16;
  33 import static java.lang.String.COMPACT_STRINGS;
  34 import static java.lang.Character.isSurrogate;
  35 import static java.lang.Character.highSurrogate;
  36 import static java.lang.Character.lowSurrogate;
  37 import static java.lang.Character.isSupplementaryCodePoint;
  38 import static java.lang.StringUTF16.Trusted.putChar;
  39 
  40 class StringDecoderUTF8 extends StringCoding.StringDecoder {
  41 
  42     StringDecoderUTF8(Charset cs, String rcn) {
  43         super(cs, rcn);
  44     }
  45 
  46     private static boolean isNotContinuation(int b) {
  47         return (b & 0xc0) != 0x80;
  48     }
  49 
  50     private static boolean isMalformed3(int b1, int b2, int b3) {
  51         return (b1 == (byte)0xe0 && (b2 & 0xe0) == 0x80) ||
  52                (b2 & 0xc0) != 0x80 || (b3 & 0xc0) != 0x80;
  53     }
  54 
  55     private static boolean isMalformed3_2(int b1, int b2) {
  56         return (b1 == (byte)0xe0 && (b2 & 0xe0) == 0x80) ||
  57                (b2 & 0xc0) != 0x80;
  58     }


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