Update #48 - Added some features from OptiFine

sources/main/java/jdk_internal/icu/impl/StringPrepDataReader.java

@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+/*
+/*
+ ******************************************************************************
+ * Copyright (C) 2003, International Business Machines Corporation and   *
+ * others. All Rights Reserved.                                               *
+ ******************************************************************************
+ *
+ * Created on May 2, 2003
+ *
+ * To change the template for this generated file go to
+ * Window>Preferences>Java>Code Generation>Code and Comments
+ */
+// CHANGELOG
+//      2005-05-19 Edward Wang
+//          - copy this file from icu4jsrc_3_2/src/com/ibm/icu/impl/StringPrepDataReader.java
+//          - move from package com.ibm.icu.impl to package sun.net.idn
+//
+package jdk_internal.icu.impl;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * @author ram
+ *
+ *         To change the template for this generated type comment go to
+ *         Window>Preferences>Java>Code Generation>Code and Comments
+ */
+public final class StringPrepDataReader implements ICUBinary.Authenticate {
+
+	/**
+	 * <p>
+	 * private constructor.
+	 * </p>
+	 * 
+	 * @param inputStream ICU uprop.dat file input stream
+	 * @exception IOException throw if data file fails authentication
+	 * @draft 2.1
+	 */
+	public StringPrepDataReader(InputStream inputStream) throws IOException {
+
+		unicodeVersion = ICUBinary.readHeader(inputStream, DATA_FORMAT_ID, this);
+
+		dataInputStream = new DataInputStream(inputStream);
+
+	}
+
+	public void read(byte[] idnaBytes, char[] mappingTable) throws IOException {
+
+		// Read the bytes that make up the idnaTrie
+		dataInputStream.read(idnaBytes);
+
+		// Read the extra data
+		for (int i = 0; i < mappingTable.length; i++) {
+			mappingTable[i] = dataInputStream.readChar();
+		}
+	}
+
+	public byte[] getDataFormatVersion() {
+		return DATA_FORMAT_VERSION;
+	}
+
+	public boolean isDataVersionAcceptable(byte version[]) {
+		return version[0] == DATA_FORMAT_VERSION[0] && version[2] == DATA_FORMAT_VERSION[2]
+				&& version[3] == DATA_FORMAT_VERSION[3];
+	}
+
+	public int[] readIndexes(int length) throws IOException {
+		int[] indexes = new int[length];
+		// Read the indexes
+		for (int i = 0; i < length; i++) {
+			indexes[i] = dataInputStream.readInt();
+		}
+		return indexes;
+	}
+
+	public byte[] getUnicodeVersion() {
+		return unicodeVersion;
+	}
+	// private data members -------------------------------------------------
+
+	/**
+	 * ICU data file input stream
+	 */
+	private DataInputStream dataInputStream;
+	private byte[] unicodeVersion;
+	/**
+	 * File format version that this class understands. No guarantees are made if a
+	 * older version is used see store.c of gennorm for more information and values
+	 */
+	/// * dataFormat="SPRP" 0x53, 0x50, 0x52, 0x50 */
+	private static final byte DATA_FORMAT_ID[] = { (byte) 0x53, (byte) 0x50, (byte) 0x52, (byte) 0x50 };
+	private static final byte DATA_FORMAT_VERSION[] = { (byte) 0x3, (byte) 0x2, (byte) 0x5, (byte) 0x2 };
+
+}