diff options
Diffstat (limited to 'libjava/classpath/gnu/xml/stream/CRLFReader.java')
| -rw-r--r-- | libjava/classpath/gnu/xml/stream/CRLFReader.java | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/xml/stream/CRLFReader.java b/libjava/classpath/gnu/xml/stream/CRLFReader.java new file mode 100644 index 00000000000..1d214ce52c1 --- /dev/null +++ b/libjava/classpath/gnu/xml/stream/CRLFReader.java @@ -0,0 +1,180 @@ +/* CRLFReader.java -- + 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.xml.stream; + +import java.io.BufferedReader; +import java.io.IOException; +import java.io.Reader; + +/** + * Filtered reader that normalizes CRLF pairs into LFs. + * + * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> + */ +class CRLFReader + extends Reader +{ + + /** + * The CR octet. + */ + public static final int CR = 13; + + /** + * The LF octet. + */ + public static final int LF = 10; + + private boolean doReset; + + protected Reader in; + + /** + * Constructor. + */ + protected CRLFReader(Reader in) + { + if (!in.markSupported()) + in = new BufferedReader(in); + this.in = in; + } + + public int read() + throws IOException + { + int c = in.read(); + if (c == 13) // CR + { + in.mark(1); + int d = in.read(); + if (d == 10) // LF + c = d; + else + in.reset(); + } + return c; + } + + public int read(char[] b) + throws IOException + { + return read(b, 0, b.length); + } + + public int read(char[] b, int off, int len) + throws IOException + { + in.mark(len + 1); + int l = in.read(b, off, len); + if (l > 0) + { + int i = indexOfCRLF(b, off, l); + if (doReset) + { + in.reset(); + if (i != -1) + { + l = in.read(b, off, (i + 1) - off); // read to CR + in.read(); // skip LF + b[i] = '\n'; // fix CR as LF + } + else + l = in.read(b, off, len); // CR(s) but no LF + } + } + return l; + } + + public boolean markSupported() + { + return in.markSupported(); + } + + public void mark(int limit) + throws IOException + { + in.mark(limit); + } + + public void reset() + throws IOException + { + in.reset(); + } + + public long skip(long n) + throws IOException + { + return in.skip(n); + } + + public void close() + throws IOException + { + in.close(); + } + + private int indexOfCRLF(char[] b, int off, int len) + throws IOException + { + doReset = false; + int lm1 = len - 1; + for (int i = off; i < len; i++) + { + if (b[i] == '\r') // CR + { + int d; + if (i == lm1) + { + d = in.read(); + doReset = true; + } + else + d = b[i + 1]; + if (d == '\n') // LF + { + doReset = true; + return i; + } + } + } + return -1; + } + +} + |