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Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/ZipUtil.java')
| -rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/ZipUtil.java | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/ZipUtil.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/ZipUtil.java deleted file mode 100644 index c25b8c7f..00000000 --- a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/ZipUtil.java +++ /dev/null @@ -1,252 +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 java.io.IOException; -import java.util.Calendar; -import java.util.Date; -import java.util.zip.CRC32; - -/** - * Utility class for handling DOS and Java time conversions. - * @since Ant 1.8.1 - */ -public abstract class ZipUtil { - /** - * Smallest date/time ZIP can handle. - */ - private static final byte[] DOS_TIME_MIN = ZipLong.getBytes(0x00002100L); - - /** - * Convert a Date object to a DOS date/time field. - * @param time the <code>Date</code> to convert - * @return the date as a <code>ZipLong</code> - */ - public static ZipLong toDosTime(Date time) { - return new ZipLong(toDosTime(time.getTime())); - } - - /** - * Convert a Date object to a DOS date/time field. - * - * <p>Stolen from InfoZip's <code>fileio.c</code></p> - * @param t number of milliseconds since the epoch - * @return the date as a byte array - */ - public static byte[] toDosTime(long t) { - byte[] result = new byte[4]; - toDosTime(t, result, 0); - return result; - } - - /** - * Convert a Date object to a DOS date/time field. - * - * <p>Stolen from InfoZip's <code>fileio.c</code></p> - * @param t number of milliseconds since the epoch - * @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-4</tt> - */ - public static void toDosTime(long t, byte[] buf, int offset) { - toDosTime(Calendar.getInstance(), t, buf, offset); - } - - static void toDosTime(Calendar c, long t, byte[] buf, int offset) { - c.setTimeInMillis(t); - - int year = c.get(Calendar.YEAR); - if (year < 1980) { - System.arraycopy(DOS_TIME_MIN, 0, buf, offset, DOS_TIME_MIN.length);// stop callers from changing the array - return; - } - int month = c.get(Calendar.MONTH) + 1; - long value = ((year - 1980) << 25) - | (month << 21) - | (c.get(Calendar.DAY_OF_MONTH) << 16) - | (c.get(Calendar.HOUR_OF_DAY) << 11) - | (c.get(Calendar.MINUTE) << 5) - | (c.get(Calendar.SECOND) >> 1); - ZipLong.putLong(value, buf, offset); - } - - /** - * Assumes a negative integer really is a positive integer that - * has wrapped around and re-creates the original value. - * - * <p>This methods is no longer used as of Apache Ant 1.9.0</p> - * - * @param i the value to treat as unsigned int. - * @return the unsigned int as a long. - */ - public static long adjustToLong(int i) { - if (i < 0) { - return 2 * ((long) Integer.MAX_VALUE) + 2 + i; - } else { - return i; - } - } - - /** - * Convert a DOS date/time field to a Date object. - * - * @param zipDosTime contains the stored DOS time. - * @return a Date instance corresponding to the given time. - */ - public static Date fromDosTime(ZipLong zipDosTime) { - long dosTime = zipDosTime.getValue(); - return new Date(dosToJavaTime(dosTime)); - } - - /** - * Converts DOS time to Java time (number of milliseconds since - * epoch). - */ - public static long dosToJavaTime(long dosTime) { - Calendar cal = Calendar.getInstance(); - // CheckStyle:MagicNumberCheck OFF - no point - cal.set(Calendar.YEAR, (int) ((dosTime >> 25) & 0x7f) + 1980); - cal.set(Calendar.MONTH, (int) ((dosTime >> 21) & 0x0f) - 1); - cal.set(Calendar.DATE, (int) (dosTime >> 16) & 0x1f); - cal.set(Calendar.HOUR_OF_DAY, (int) (dosTime >> 11) & 0x1f); - cal.set(Calendar.MINUTE, (int) (dosTime >> 5) & 0x3f); - cal.set(Calendar.SECOND, (int) (dosTime << 1) & 0x3e); - cal.set(Calendar.MILLISECOND, 0); - // CheckStyle:MagicNumberCheck ON - return cal.getTime().getTime(); - } - - /** - * If the entry has Unicode*ExtraFields and the CRCs of the - * names/comments match those of the extra fields, transfer the - * known Unicode values from the extra field. - */ - static void setNameAndCommentFromExtraFields(ZipEntry ze, - byte[] originalNameBytes, - byte[] commentBytes) { - UnicodePathExtraField name = (UnicodePathExtraField) - ze.getExtraField(UnicodePathExtraField.UPATH_ID); - String originalName = ze.getName(); - String newName = getUnicodeStringIfOriginalMatches(name, - originalNameBytes); - if (newName != null && !originalName.equals(newName)) { - ze.setName(newName); - } - - if (commentBytes != null && commentBytes.length > 0) { - UnicodeCommentExtraField cmt = (UnicodeCommentExtraField) - ze.getExtraField(UnicodeCommentExtraField.UCOM_ID); - String newComment = - getUnicodeStringIfOriginalMatches(cmt, commentBytes); - if (newComment != null) { - ze.setComment(newComment); - } - } - } - - /** - * If the stored CRC matches the one of the given name, return the - * Unicode name of the given field. - * - * <p>If the field is null or the CRCs don't match, return null - * instead.</p> - */ - private static - String getUnicodeStringIfOriginalMatches(AbstractUnicodeExtraField f, - byte[] orig) { - if (f != null) { - CRC32 crc32 = new CRC32(); - crc32.update(orig); - long origCRC32 = crc32.getValue(); - - if (origCRC32 == f.getNameCRC32()) { - try { - return ZipEncodingHelper - .UTF8_ZIP_ENCODING.decode(f.getUnicodeName()); - } catch (IOException ex) { - // UTF-8 unsupported? should be impossible the - // Unicode*ExtraField must contain some bad bytes - - // TODO log this anywhere? - return null; - } - } - } - return null; - } - - /** - * Create a copy of the given array - or return null if the - * argument is null. - */ - static byte[] copy(byte[] from) { - if (from != null) { - byte[] to = new byte[from.length]; - System.arraycopy(from, 0, to, 0, to.length); - return to; - } - return null; - } - - /** - * Whether this library is able to read or write the given entry. - */ - static boolean canHandleEntryData(ZipEntry entry) { - return supportsEncryptionOf(entry) && supportsMethodOf(entry); - } - - /** - * Whether this library supports the encryption used by the given - * entry. - * - * @return true if the entry isn't encrypted at all - */ - private static boolean supportsEncryptionOf(ZipEntry entry) { - return !entry.getGeneralPurposeBit().usesEncryption(); - } - - /** - * Whether this library supports the compression method used by - * the given entry. - * - * @return true if the compression method is STORED or DEFLATED - */ - private static boolean supportsMethodOf(ZipEntry entry) { - return entry.getMethod() == ZipEntry.STORED - || entry.getMethod() == ZipEntry.DEFLATED; - } - - /** - * Checks whether the entry requires features not (yet) supported - * by the library and throws an exception if it does. - */ - static void checkRequestedFeatures(ZipEntry ze) - throws UnsupportedZipFeatureException { - if (!supportsEncryptionOf(ze)) { - throw - new UnsupportedZipFeatureException(UnsupportedZipFeatureException - .Feature.ENCRYPTION, ze); - } - if (!supportsMethodOf(ze)) { - throw - new UnsupportedZipFeatureException(UnsupportedZipFeatureException - .Feature.METHOD, ze); - } - } -} |