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Diffstat (limited to 'libjava/java/io/PushbackReader.java')
-rw-r--r-- | libjava/java/io/PushbackReader.java | 136 |
1 files changed, 0 insertions, 136 deletions
diff --git a/libjava/java/io/PushbackReader.java b/libjava/java/io/PushbackReader.java deleted file mode 100644 index 0cfd63cdb2b..00000000000 --- a/libjava/java/io/PushbackReader.java +++ /dev/null @@ -1,136 +0,0 @@ -/* Copyright (C) 1998, 1999 Cygnus Solutions - - This file is part of libgcj. - -This software is copyrighted work licensed under the terms of the -Libgcj License. Please consult the file "LIBGCJ_LICENSE" for -details. */ - -package java.io; - -/** - * @author Warren Levy <warrenl@cygnus.com> - * @date October 16, 1998. - */ -/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3 - * "The Java Language Specification", ISBN 0-201-63451-1 - * plus online API docs for JDK 1.2 beta from http://www.javasoft.com. - * Status: Believed complete and correct. - */ - -public class PushbackReader extends FilterReader -{ - /* Internal buffer array for data. */ - private char[] buf; - - /* The current position in the buffer. */ - private int pos; - - public PushbackReader(Reader in) - { - this(in, 1); - } - - public PushbackReader(Reader in, int size) - { - super(in); - if (size < 0) - throw new IllegalArgumentException(); - buf = new char[size]; - pos = buf.length; - } - - public void close() throws IOException - { - synchronized (lock) - { - buf = null; - super.close(); - } - } - - public boolean markSupported() - { - return false; - } - - public int read() throws IOException - { - synchronized (lock) - { - if (buf == null) - throw new IOException(); - - if (pos < buf.length) - return ((int) buf[pos++]) & 0xFFFF; - - return super.read(); - } - } - - public int read(char[] b, int off, int len) throws IOException - { - synchronized (lock) - { - if (buf == null) - throw new IOException(); - - if (off < 0 || len < 0 || off + len > b.length) - throw new ArrayIndexOutOfBoundsException(); - - int numBytes = Math.min(buf.length - pos, len); - for (int i = 0; i < numBytes; i++) - b[off++] = buf[pos++]; - - return numBytes + super.read(b, off, len - numBytes); - } - } - - public boolean ready() throws IOException - { - synchronized (lock) - { - if (buf == null) - throw new IOException(); - - if (buf.length - pos > 0) - return true; - - return super.ready(); - } - } - - public void unread(int b) throws IOException - { - synchronized (lock) - { - if (buf == null || pos <= 0) - throw new IOException(); - - buf[--pos] = (char) b; - } - } - - public void unread(char[] b) throws IOException - { - unread(b, 0, b.length); - } - - public void unread(char[] b, int off, int len) throws IOException - { - synchronized (lock) - { - if (buf == null || pos < len) - throw new IOException(); - - // Note the order that these chars are being added is the opposite - // of what would be done if they were added to the buffer one at a time. - // See the Java Class Libraries book p. 1397. - System.arraycopy(b, off, buf, pos - len, len); - - // Don't put this into the arraycopy above, an exception might be thrown - // and in that case we don't want to modify pos. - pos -= len; - } - } -} |