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. --- .../gnu/java/nio/charset/ByteCharset.java | 193 +++++++++++++++++++++ 1 file changed, 193 insertions(+) create mode 100644 libjava/classpath/gnu/java/nio/charset/ByteCharset.java (limited to 'libjava/classpath/gnu/java/nio/charset/ByteCharset.java') diff --git a/libjava/classpath/gnu/java/nio/charset/ByteCharset.java b/libjava/classpath/gnu/java/nio/charset/ByteCharset.java new file mode 100644 index 000000000..60d06fc4b --- /dev/null +++ b/libjava/classpath/gnu/java/nio/charset/ByteCharset.java @@ -0,0 +1,193 @@ +/* ByteCharset.java -- Abstract class for generic 1-byte encodings. + Copyright (C) 2005 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.CharsetEncoder; +import java.nio.charset.CoderResult; + +/** + * A generic encoding framework for single-byte encodings, utilizing a look-up + * table. + * + * This replaces the gnu.java.io.EncoderEightBitLookup class, created by Aron + * Renn. + * + * @author Sven de Marothy + * @modified Ian Rogers + */ +abstract class ByteCharset extends Charset +{ + protected final char[] lookupTable; + /** + * Char to signify the character in the table is undefined + */ + protected static final char NONE = (char) 0xFFFD; + + ByteCharset(String canonicalName, String[] aliases, char[] lookup) + { + super(canonicalName, aliases); + lookupTable = lookup; + } + + /** + * Most western charsets include ASCII, but this should be overloaded for + * others. + */ + public boolean contains(Charset cs) + { + return cs instanceof US_ASCII || (cs.getClass() == getClass()); + } + + char[] getLookupTable() + { + return lookupTable; + } + + public CharsetDecoder newDecoder() + { + return new Decoder(this); + } + + public CharsetEncoder newEncoder() + { + return new Encoder(this); + } + + private static final class Decoder extends CharsetDecoder + { + /** Lookup of byte to char mappings */ + private final char[] lookup; + + /** Helper to decode loops */ + private final ByteDecodeLoopHelper helper = new ByteDecodeLoopHelper() + { + protected boolean isMappable(byte b) + { + return lookup[(int) (b & 0xFF)] != NONE; + } + protected char mapToChar(byte b) + { + return lookup[(int) (b & 0xFF)]; + } + }; + + // Package-private to avoid a trampoline constructor. + Decoder(ByteCharset cs) + { + super(cs, 1.0f, 1.0f); + lookup = cs.getLookupTable(); + } + + protected CoderResult decodeLoop(ByteBuffer in, CharBuffer out) + { + return helper.decodeLoop(in, out); + } + } + + private static final class Encoder extends CharsetEncoder + { + /** Lookup of char to byte mappings */ + private final byte[] lookup; + + /** Helper to encode loops */ + private final ByteEncodeLoopHelper helper = new ByteEncodeLoopHelper() + { + protected boolean isMappable(char c) + { + return canEncode(c); + } + protected byte mapToByte(char c) + { + return lookup[c]; + } + }; + + // Package-private to avoid a trampoline constructor. + Encoder(ByteCharset cs) + { + super(cs, 1.0f, 1.0f); + + char[] lookup_table = cs.getLookupTable(); + + // Create the inverse look-up table. + // determine required size of encoding_table: + int max = 0; + for (int i = 0; i < lookup_table.length; i++) + { + int c = (int) lookup_table[i]; + max = (c > max && c < NONE) ? c : max; + } + + lookup = new byte[max + 1]; + + for (int i = 0; i < lookup_table.length; i++) + { + int c = (int) lookup_table[i]; + if (c != 0 && c < NONE) + { + lookup[c] = (byte) i; + } + } + } + + public boolean canEncode(char c) + { + byte b = (c < lookup.length) ? lookup[c] : 0; + return b != 0 || c == 0; + } + + public boolean canEncode(CharSequence cs) + { + for (int i = 0; i < cs.length(); ++i) + { + if (!canEncode(cs.charAt(i))) + return false; + } + return true; + } + + protected CoderResult encodeLoop(CharBuffer in, ByteBuffer out) + { + return helper.encodeLoop(in, out); + } + } +} -- cgit v1.2.3