From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- .../classpath/java/nio/charset/CoderResult.java | 189 +++++++++++++++++++++ 1 file changed, 189 insertions(+) create mode 100644 libjava/classpath/java/nio/charset/CoderResult.java (limited to 'libjava/classpath/java/nio/charset/CoderResult.java') diff --git a/libjava/classpath/java/nio/charset/CoderResult.java b/libjava/classpath/java/nio/charset/CoderResult.java new file mode 100644 index 000000000..b083d840e --- /dev/null +++ b/libjava/classpath/java/nio/charset/CoderResult.java @@ -0,0 +1,189 @@ +/* CoderResult.java -- + Copyright (C) 2002, 2004 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 java.nio.charset; + +import java.lang.ref.WeakReference; +import java.nio.BufferOverflowException; +import java.nio.BufferUnderflowException; +import java.util.HashMap; + +/** + * @author Jesse Rosenstock + * @since 1.4 + */ +public class CoderResult +{ + private static final int TYPE_MALFORMED = 0; + private static final int TYPE_OVERFLOW = 1; + private static final int TYPE_UNDERFLOW = 2; + private static final int TYPE_UNMAPPABLE = 3; + + public static final CoderResult OVERFLOW + = new CoderResult (TYPE_OVERFLOW, 0); + public static final CoderResult UNDERFLOW + = new CoderResult (TYPE_UNDERFLOW, 0); + + private static final String[] names + = { "MALFORMED", "OVERFLOW", "UNDERFLOW", "UNMAPPABLE" }; + + private static final Cache malformedCache + = new Cache () + { + protected CoderResult make (int length) + { + return new CoderResult (TYPE_MALFORMED, length); + } + }; + + private static final Cache unmappableCache + = new Cache () + { + protected CoderResult make (int length) + { + return new CoderResult (TYPE_UNMAPPABLE, length); + } + }; + + private final int type; + private final int length; + + // Package-private to avoid a trampoline constructor. + CoderResult (int type, int length) + { + this.type = type; + this.length = length; + } + + public boolean isError () + { + return length > 0; + } + + public boolean isMalformed () + { + return type == TYPE_MALFORMED; + } + + public boolean isOverflow () + { + return type == TYPE_OVERFLOW; + } + + public boolean isUnderflow () + { + return type == TYPE_UNDERFLOW; + } + + public boolean isUnmappable () + { + return type == TYPE_UNMAPPABLE; + } + + public int length () + { + if (length <= 0) + throw new UnsupportedOperationException (); + else + return length; + } + + public static CoderResult malformedForLength (int length) + { + return malformedCache.get (length); + } + + public void throwException () + throws CharacterCodingException + { + switch (type) + { + case TYPE_MALFORMED: + throw new MalformedInputException (length); + case TYPE_OVERFLOW: + throw new BufferOverflowException (); + case TYPE_UNDERFLOW: + throw new BufferUnderflowException (); + case TYPE_UNMAPPABLE: + throw new UnmappableCharacterException (length); + } + } + + public String toString () + { + String name = names[type]; + return (length > 0) ? name + '[' + length + ']' : name; + } + + public static CoderResult unmappableForLength (int length) + { + return unmappableCache.get (length); + } + + private abstract static class Cache + { + private final HashMap cache; + + // Package-private to avoid a trampoline constructor. + Cache () + { + cache = new HashMap (); + } + + // Package-private to avoid a trampoline. + synchronized CoderResult get (int length) + { + if (length <= 0) + throw new IllegalArgumentException ("Non-positive length"); + + Integer len = Integer.valueOf (length); + CoderResult cr = null; + Object o; + if ((o = cache.get (len)) != null) + cr = (CoderResult) ((WeakReference) o).get (); + if (cr == null) + { + cr = make (length); + cache.put (len, new WeakReference (cr)); + } + + return cr; + } + + protected abstract CoderResult make (int length); + } +} -- cgit v1.2.3