diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/GeneralPurposeBit.java')
| -rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/GeneralPurposeBit.java | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/GeneralPurposeBit.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/GeneralPurposeBit.java deleted file mode 100644 index 1d2255fa..00000000 --- a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/GeneralPurposeBit.java +++ /dev/null @@ -1,194 +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; - -/** - * Parser/encoder for the "general purpose bit" field in ZIP's local - * file and central directory headers. - * - * @since Ant 1.9.0 - */ -public final class GeneralPurposeBit implements Cloneable { - /** - * Indicates that the file is encrypted. - */ - private static final int ENCRYPTION_FLAG = 1 << 0; - - /** - * Indicates that a data descriptor stored after the file contents - * will hold CRC and size information. - */ - private static final int DATA_DESCRIPTOR_FLAG = 1 << 3; - - /** - * Indicates strong encryption. - */ - private static final int STRONG_ENCRYPTION_FLAG = 1 << 6; - - /** - * Indicates that filenames are written in utf-8. - * - * <p>The only reason this is public is that {@link - * ZipOutputStream#EFS_FLAG} was public in several versions of - * Apache Ant and we needed a substitute for it.</p> - */ - public static final int UFT8_NAMES_FLAG = 1 << 11; - - private boolean languageEncodingFlag = false; - private boolean dataDescriptorFlag = false; - private boolean encryptionFlag = false; - private boolean strongEncryptionFlag = false; - - public GeneralPurposeBit() { - } - - /** - * whether the current entry uses UTF8 for file name and comment. - */ - public boolean usesUTF8ForNames() { - return languageEncodingFlag; - } - - /** - * whether the current entry will use UTF8 for file name and comment. - */ - public void useUTF8ForNames(boolean b) { - languageEncodingFlag = b; - } - - /** - * whether the current entry uses the data descriptor to store CRC - * and size information - */ - public boolean usesDataDescriptor() { - return dataDescriptorFlag; - } - - /** - * whether the current entry will use the data descriptor to store - * CRC and size information - */ - public void useDataDescriptor(boolean b) { - dataDescriptorFlag = b; - } - - /** - * whether the current entry is encrypted - */ - public boolean usesEncryption() { - return encryptionFlag; - } - - /** - * whether the current entry will be encrypted - */ - public void useEncryption(boolean b) { - encryptionFlag = b; - } - - /** - * whether the current entry is encrypted using strong encryption - */ - public boolean usesStrongEncryption() { - return encryptionFlag && strongEncryptionFlag; - } - - /** - * whether the current entry will be encrypted using strong encryption - */ - public void useStrongEncryption(boolean b) { - strongEncryptionFlag = b; - if (b) { - useEncryption(true); - } - } - - /** - * Encodes the set bits in a form suitable for ZIP archives. - */ - public byte[] encode() { - byte[] result = new byte[2]; - encode(result, 0); - return result; - } - - /** - * Encodes the set bits in a form suitable for ZIP archives. - * - * @param buf the output buffer - * @param offset - * The offset within the output buffer of the first byte to be written. - * must be non-negative and no larger than <tt>buf.length-2</tt> - */ - public void encode(byte[] buf, int offset) { - ZipShort.putShort((dataDescriptorFlag ? DATA_DESCRIPTOR_FLAG : 0) - | - (languageEncodingFlag ? UFT8_NAMES_FLAG : 0) - | - (encryptionFlag ? ENCRYPTION_FLAG : 0) - | - (strongEncryptionFlag ? STRONG_ENCRYPTION_FLAG : 0) - , buf, offset); - } - - /** - * Parses the supported flags from the given archive data. - * @param data local file header or a central directory entry. - * @param offset offset at which the general purpose bit starts - */ - public static GeneralPurposeBit parse(final byte[] data, final int offset) { - final int generalPurposeFlag = ZipShort.getValue(data, offset); - GeneralPurposeBit b = new GeneralPurposeBit(); - b.useDataDescriptor((generalPurposeFlag & DATA_DESCRIPTOR_FLAG) != 0); - b.useUTF8ForNames((generalPurposeFlag & UFT8_NAMES_FLAG) != 0); - b.useStrongEncryption((generalPurposeFlag & STRONG_ENCRYPTION_FLAG) - != 0); - b.useEncryption((generalPurposeFlag & ENCRYPTION_FLAG) != 0); - return b; - } - - @Override - public int hashCode() { - return 3 * (7 * (13 * (17 * (encryptionFlag ? 1 : 0) - + (strongEncryptionFlag ? 1 : 0)) - + (languageEncodingFlag ? 1 : 0)) - + (dataDescriptorFlag ? 1 : 0)); - } - - @Override - public boolean equals(Object o) { - if (!(o instanceof GeneralPurposeBit)) { - return false; - } - GeneralPurposeBit g = (GeneralPurposeBit) o; - return g.encryptionFlag == encryptionFlag - && g.strongEncryptionFlag == strongEncryptionFlag - && g.languageEncodingFlag == languageEncodingFlag - && g.dataDescriptorFlag == dataDescriptorFlag; - } - - @Override - public Object clone() { - try { - return super.clone(); - } catch (CloneNotSupportedException ex) { - // impossible - throw new RuntimeException("GeneralPurposeBit is not Cloneable?", ex); - } - } -} |