--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007- VTT Technical Research Centre of Finland.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+/*\r
+ * Created on Jan 21, 2005\r
+ * \r
+ * Copyright Toni Kalajainen\r
+ * \r
+ * Licensed under the Apache License, Version 2.0 (the "License");\r
+ * you may not use this file except in compliance with the License.\r
+ * You may obtain a copy of the License at\r
+ *\r
+ * http://www.apache.org/licenses/LICENSE-2.0\r
+ *\r
+ * Unless required by applicable law or agreed to in writing, software\r
+ * distributed under the License is distributed on an "AS IS" BASIS,\r
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
+ * See the License for the specific language governing permissions and\r
+ * limitations under the License.\r
+ */\r
+package org.simantics.utils.bytes;\r
+\r
+/**\r
+ * Big Endian long <-> byte array conversions\r
+ * Motorola order, Network order\r
+ *\r
+ * @author Toni Kalajainen\r
+ */\r
+public class BELong {\r
+ \r
+ /**\r
+ * Convert long to byte array\r
+ * @param l long value\r
+ * @return byte array\r
+ */\r
+ public static byte[] toBytes(long value)\r
+ {\r
+ byte array[] = new byte[8];\r
+ array[0] = (byte) (value & 0xff);\r
+ array[1] = (byte) ((value >> 8) & 0xff);\r
+ array[2] = (byte) ((value >> 16) & 0xff);\r
+ array[3] = (byte) ((value >> 24) & 0xff);\r
+ array[4] = (byte) ((value >> 32) & 0xff);\r
+ array[5] = (byte) ((value >> 40) & 0xff);\r
+ array[6] = (byte) ((value >> 48) & 0xff);\r
+ array[7] = (byte) ((value >> 56) & 0xff);\r
+ return array;\r
+ }\r
+ \r
+ /**\r
+ * Write long value to byte array\r
+ * @param value the long value\r
+ * @param array the byte array\r
+ * @param offset the offset\r
+ */\r
+ public static void write(long value, byte array[], int offset)\r
+ {\r
+ if (offset+8>array.length)\r
+ throw new IndexOutOfBoundsException(); \r
+ array[0 + offset] = (byte) (value & 0xff);\r
+ array[1 + offset] = (byte) (value >> 8);\r
+ array[2 + offset] = (byte) (value >> 16);\r
+ array[3 + offset] = (byte) (value >> 24);\r
+ array[4 + offset] = (byte) (value >> 32);\r
+ array[5 + offset] = (byte) (value >> 40);\r
+ array[6 + offset] = (byte) (value >> 48);\r
+ array[7 + offset] = (byte) (value >> 56);\r
+ }\r
+ \r
+ /**\r
+ * Write long value to byte array\r
+ * @param value the long value\r
+ * @param array the byte array\r
+ * @param offset the offset\r
+ */\r
+ public static void write(long value, byte array[])\r
+ {\r
+ if (array.length<8)\r
+ throw new IndexOutOfBoundsException(); \r
+ array[0] = (byte) (value & 0xff);\r
+ array[1] = (byte) (value >> 8);\r
+ array[2] = (byte) (value >> 16);\r
+ array[3] = (byte) (value >> 24);\r
+ array[4] = (byte) (value >> 32);\r
+ array[5] = (byte) (value >> 40);\r
+ array[6] = (byte) (value >> 48);\r
+ array[7] = (byte) (value >> 56);\r
+ } \r
+ /**\r
+ * read long value from byte array\r
+ * @param array the array\r
+ * @param offset offset\r
+ * @return the value\r
+ */\r
+ public static long toLong(byte array[], int offset)\r
+ {\r
+ if (offset+8>array.length)\r
+ throw new IndexOutOfBoundsException(); \r
+ long value = \r
+ ( ((long) array[0 + offset] & 0xFF) ) |\r
+ ( ((long) array[1 + offset] & 0xFF) << 8) |\r
+ ( ((long) array[2 + offset] & 0xFF) << 16) | \r
+ ( ((long) array[3 + offset] & 0xFF) << 24) | \r
+ ( ((long) array[4 + offset] & 0xFF) << 32) | \r
+ ( ((long) array[5 + offset] & 0xFF) << 40) | \r
+ ( ((long) array[6 + offset] & 0xFF) << 48) | \r
+ ( ((long) array[7 + offset] & 0xFF) << 56);\r
+ return value;\r
+ }\r
+ /**\r
+ * read long value from byte array\r
+ * @param array the array\r
+ * @return the value\r
+ */\r
+ public static long toLong(byte array[])\r
+ {\r
+ if (8>array.length)\r
+ throw new IndexOutOfBoundsException(); \r
+ long value = \r
+ ( ((long) array[0] & 0xFF) ) |\r
+ ( ((long) array[1] & 0xFF) << 8) |\r
+ ( ((long) array[2] & 0xFF) << 16) | \r
+ ( ((long) array[3] & 0xFF) << 24) | \r
+ ( ((long) array[4] & 0xFF) << 32) | \r
+ ( ((long) array[5] & 0xFF) << 40) | \r
+ ( ((long) array[6] & 0xFF) << 48) | \r
+ ( ((long) array[7] & 0xFF) << 56);\r
+ return value;\r
+ }\r
+\r
+ /**\r
+ * Test cases\r
+ * @param args\r
+ */\r
+ public static void main(String[] args) {\r
+ System.out.println("min="+Long.MIN_VALUE+" max="+Long.MAX_VALUE);\r
+ long value = -1290000000;\r
+ byte array[] = toBytes(value);\r
+ System.out.print(value);\r
+ System.out.print(" = ");\r
+ printByteArray(array);\r
+ System.out.println();\r
+ \r
+ write(value, array, 0);\r
+ System.out.print(value);\r
+ System.out.print(" = ");\r
+ printByteArray(array);\r
+ System.out.println();\r
+ \r
+ value = toLong(array, 0);\r
+ printByteArray(array);\r
+ System.out.print(" = ");\r
+ System.out.print(value);\r
+ System.out.println();\r
+ \r
+ value = toLong(array);\r
+ printByteArray(array);\r
+ System.out.print(" = ");\r
+ System.out.print(value);\r
+ System.out.println();\r
+ \r
+ }\r
+ \r
+ public static void printByteArray(byte array[]) {\r
+ for (int i=0; i<array.length; i++) {\r
+ System.out.print(array[i] & 0xff);\r
+ if (i<array.length-1) \r
+ System.out.print(",");\r
+ }\r
+ }\r
+}\r
Code Review / simantics / platform.git / blobdiff