diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/ZipEightByteInteger.java')
| -rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/ZipEightByteInteger.java | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/ZipEightByteInteger.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/ZipEightByteInteger.java deleted file mode 100644 index 8d582dd8..00000000 --- a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/ZipEightByteInteger.java +++ /dev/null @@ -1,229 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - */ -package org.apache.tools.zip; - -import static org.apache.tools.zip.ZipConstants.BYTE_MASK; - -import java.math.BigInteger; - -/** - * Utility class that represents an eight byte integer with conversion - * rules for the big endian byte order of ZIP files. - */ -public final class ZipEightByteInteger { - - private static final int BYTE_1 = 1; - private static final int BYTE_1_MASK = 0xFF00; - private static final int BYTE_1_SHIFT = 8; - - private static final int BYTE_2 = 2; - private static final int BYTE_2_MASK = 0xFF0000; - private static final int BYTE_2_SHIFT = 16; - - private static final int BYTE_3 = 3; - private static final long BYTE_3_MASK = 0xFF000000L; - private static final int BYTE_3_SHIFT = 24; - - private static final int BYTE_4 = 4; - private static final long BYTE_4_MASK = 0xFF00000000L; - private static final int BYTE_4_SHIFT = 32; - - private static final int BYTE_5 = 5; - private static final long BYTE_5_MASK = 0xFF0000000000L; - private static final int BYTE_5_SHIFT = 40; - - private static final int BYTE_6 = 6; - private static final long BYTE_6_MASK = 0xFF000000000000L; - private static final int BYTE_6_SHIFT = 48; - - private static final int BYTE_7 = 7; - private static final long BYTE_7_MASK = 0x7F00000000000000L; - private static final int BYTE_7_SHIFT = 56; - - private static final int LEFTMOST_BIT_SHIFT = 63; - private static final byte LEFTMOST_BIT = (byte) 0x80; - - private final BigInteger value; - - public static final ZipEightByteInteger ZERO = new ZipEightByteInteger(0); - - /** - * Create instance from a number. - * @param value the long to store as a ZipEightByteInteger - */ - public ZipEightByteInteger(long value) { - this(BigInteger.valueOf(value)); - } - - /** - * Create instance from a number. - * @param value the BigInteger to store as a ZipEightByteInteger - */ - public ZipEightByteInteger(BigInteger value) { - this.value = value; - } - - /** - * Create instance from bytes. - * @param bytes the bytes to store as a ZipEightByteInteger - */ - public ZipEightByteInteger (byte[] bytes) { - this(bytes, 0); - } - - /** - * Create instance from the eight bytes starting at offset. - * @param bytes the bytes to store as a ZipEightByteInteger - * @param offset the offset to start - */ - public ZipEightByteInteger (byte[] bytes, int offset) { - value = ZipEightByteInteger.getValue(bytes, offset); - } - - /** - * Get value as eight bytes in big endian byte order. - * @return value as eight bytes in big endian order - */ - public byte[] getBytes() { - return ZipEightByteInteger.getBytes(value); - } - - /** - * Get value as Java long. - * @return value as a long - */ - public long getLongValue() { - return value.longValue(); - } - - /** - * Get value as Java long. - * @return value as a long - */ - public BigInteger getValue() { - return value; - } - - /** - * Get value as eight bytes in big endian byte order. - * @param value the value to convert - * @return value as eight bytes in big endian byte order - */ - public static byte[] getBytes(long value) { - return getBytes(BigInteger.valueOf(value)); - } - - /** - * Get value as eight bytes in big endian byte order. - * @param value the value to convert - * @return value as eight bytes in big endian byte order - */ - public static byte[] getBytes(BigInteger value) { - byte[] result = new byte[8]; - long val = value.longValue(); - result[0] = (byte) ((val & BYTE_MASK)); - result[BYTE_1] = (byte) ((val & BYTE_1_MASK) >> BYTE_1_SHIFT); - result[BYTE_2] = (byte) ((val & BYTE_2_MASK) >> BYTE_2_SHIFT); - result[BYTE_3] = (byte) ((val & BYTE_3_MASK) >> BYTE_3_SHIFT); - result[BYTE_4] = (byte) ((val & BYTE_4_MASK) >> BYTE_4_SHIFT); - result[BYTE_5] = (byte) ((val & BYTE_5_MASK) >> BYTE_5_SHIFT); - result[BYTE_6] = (byte) ((val & BYTE_6_MASK) >> BYTE_6_SHIFT); - result[BYTE_7] = (byte) ((val & BYTE_7_MASK) >> BYTE_7_SHIFT); - if (value.testBit(LEFTMOST_BIT_SHIFT)) { - result[BYTE_7] |= LEFTMOST_BIT; - } - return result; - } - - /** - * Helper method to get the value as a Java long from eight bytes - * starting at given array offset - * @param bytes the array of bytes - * @param offset the offset to start - * @return the corresponding Java long value - */ - public static long getLongValue(byte[] bytes, int offset) { - return getValue(bytes, offset).longValue(); - } - - /** - * Helper method to get the value as a Java BigInteger from eight - * bytes starting at given array offset - * @param bytes the array of bytes - * @param offset the offset to start - * @return the corresponding Java BigInteger value - */ - public static BigInteger getValue(byte[] bytes, int offset) { - long value = ((long) bytes[offset + BYTE_7] << BYTE_7_SHIFT) & BYTE_7_MASK; - value += ((long) bytes[offset + BYTE_6] << BYTE_6_SHIFT) & BYTE_6_MASK; - value += ((long) bytes[offset + BYTE_5] << BYTE_5_SHIFT) & BYTE_5_MASK; - value += ((long) bytes[offset + BYTE_4] << BYTE_4_SHIFT) & BYTE_4_MASK; - value += ((long) bytes[offset + BYTE_3] << BYTE_3_SHIFT) & BYTE_3_MASK; - value += ((long) bytes[offset + BYTE_2] << BYTE_2_SHIFT) & BYTE_2_MASK; - value += ((long) bytes[offset + BYTE_1] << BYTE_1_SHIFT) & BYTE_1_MASK; - value += ((long) bytes[offset] & BYTE_MASK); - BigInteger val = BigInteger.valueOf(value); - return (bytes[offset + BYTE_7] & LEFTMOST_BIT) == LEFTMOST_BIT - ? val.setBit(LEFTMOST_BIT_SHIFT) : val; - } - - /** - * Helper method to get the value as a Java long from an eight-byte array - * @param bytes the array of bytes - * @return the corresponding Java long value - */ - public static long getLongValue(byte[] bytes) { - return getLongValue(bytes, 0); - } - - /** - * Helper method to get the value as a Java long from an eight-byte array - * @param bytes the array of bytes - * @return the corresponding Java BigInteger value - */ - public static BigInteger getValue(byte[] bytes) { - return getValue(bytes, 0); - } - - /** - * Override to make two instances with same value equal. - * @param o an object to compare - * @return true if the objects are equal - */ - @Override - public boolean equals(Object o) { - if (o == null || !(o instanceof ZipEightByteInteger)) { - return false; - } - return value.equals(((ZipEightByteInteger) o).getValue()); - } - - /** - * Override to make two instances with same value equal. - * @return the hashCode of the value stored in the ZipEightByteInteger - */ - @Override - public int hashCode() { - return value.hashCode(); - } - - @Override - public String toString() { - return "ZipEightByteInteger value: " + value; - } -} |