226 lines
6.3 KiB
Java
226 lines
6.3 KiB
Java
/* ZipEntry.java - Represents entries in a zip file archive
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Copyright (C) 1999, 2000 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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As a special exception, if you link this library with other files to
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produce an executable, this library does not by itself cause the
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resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why the
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executable file might be covered by the GNU General Public License. */
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package java.util.zip;
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/**
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* @author Per Bothner
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* @date January 6, 1999.
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*/
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/*
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* Written using on-line Java Platform 1.2 API Specification, as well
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* as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
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* Status: Believed complete and correct.
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*/
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/**
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* Represents entries in a zip file archive.
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* An Entry cn be created by giving a name or by giving an already existing
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* ZipEntries whose values should be copied. The name normally represents a
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* file path name or directory name.
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*/
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public class ZipEntry implements ZipConstants, Cloneable
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{
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// These values were determined using a simple test program.
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public static final int STORED = 0;
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public static final int DEFLATED = 8;
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String comment;
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long compressedSize = -1;
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long crc = -1;
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byte[] extra;
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int method = -1;
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String name;
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long size = -1;
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long time = -1;
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long relativeOffset = -1;
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ZipEntry next;
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public ZipEntry (String name)
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{
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if (name.length() > 65535)
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throw new IllegalArgumentException ();
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this.name = name;
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}
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/**
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* Creates a new ZipEntry using the fields of a given ZipEntry.
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* The comment, compressedSize, crc, extra, method, name, size, time and
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* relativeOffset fields are copied from the given entry.
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* Note that the contents of the extra byte array field is not cloned,
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* only the reference is copied.
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* The clone() method does clone the contents of the extra byte array if
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* needed.
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* @since 1.2
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*/
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public ZipEntry (ZipEntry ent)
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{
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comment = ent.comment;
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compressedSize = ent.compressedSize;
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crc = ent.crc;
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extra = ent.extra;
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method = ent.method;
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name = ent.name;
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size = ent.size;
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time = ent.time;
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relativeOffset = ent.relativeOffset;
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}
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/**
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* Creates a clone of this ZipEntry. Calls <code>new ZipEntry (this)</code>
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* and creates a clone of the contents of the extra byte array field.
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*
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* @since 1.2
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*/
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public Object clone ()
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{
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// JCL defines this as being the same as the copy constructor above,
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// except that value of the "extra" field is also copied.
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ZipEntry clone = new ZipEntry (this);
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clone.extra = (byte[]) extra.clone ();
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return clone;
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}
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public String getComment () { return comment; }
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public long getCompressedSize () { return compressedSize; }
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public long getCrc () { return crc; }
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public byte[] getExtra() { return extra; }
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public int getMethod () { return method; }
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public String getName () { return name; }
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public long getSize () { return size; }
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public long getTime () { return time; }
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public boolean isDirectory ()
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{
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if (name != null)
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{
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int nlen = name.length();
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if (nlen > 0 && name.charAt(nlen-1) == '/')
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return true;
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}
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return false;
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}
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public void setComment (String comment)
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{
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if (comment != null && comment.length() > 65535)
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throw new IllegalArgumentException ();
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this.comment = comment;
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}
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/**
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* Sets the compressedSize of this ZipEntry.
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* The new size must be between 0 and 0xffffffffL.
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* @since 1.2
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*/
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public void setCompressedSize (long compressedSize)
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{
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if (compressedSize < 0 || compressedSize > 0xffffffffL)
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throw new IllegalArgumentException ();
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this.compressedSize = compressedSize;
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}
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public void setCrc (long crc)
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{
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if (crc < 0 || crc > 0xffffffffL)
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throw new IllegalArgumentException ();
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this.crc = crc;
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}
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public void setExtra (byte[] extra)
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{
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if (extra != null && extra.length > 65535)
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throw new IllegalArgumentException ();
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this.extra = extra;
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}
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public void setMethod (int method)
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{
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if (method != DEFLATED && method != STORED)
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throw new IllegalArgumentException ();
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this.method = method;
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}
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public void setSize (long size)
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{
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if (size < 0 || size > 0xffffffffL)
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throw new IllegalArgumentException ();
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this.size = size;
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}
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public void setTime (long time)
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{
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this.time = time;
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}
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private final static short[] daysToMonthStart = {
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//Jan Feb Mar Apr May Jun Jul
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0, 31, 31+28, 2*31+28, 2*31+28+30, 3*31+28+30, 3*31+28+2*30,
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// Aug Sep Oct Nov Dec
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4*31+28+2*30, 5*31+28+2*30, 5*31+28+3*30, 6*31+28+3*30, 6*31+28+4*30};
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/** Convert a DOS-style type value to milliseconds since 1970. */
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static long timeFromDOS (int date, int time)
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{
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int sec = 2 * (time & 0x1f);
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int min = (time >> 5) & 0x3f;
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int hrs = (time >> 11) & 0x1f;
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int day = date & 0x1f;
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int mon = ((date >> 5) & 0xf) - 1;
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int year = ((date >> 9) & 0x7f) + 10; /* Since 1970. */
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// Guard against invalid or missing date causing IndexOutOfBoundsException.
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if (mon < 0 || mon > 11)
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return -1;
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long mtime = (((hrs * 60) + min) * 60 + sec) * 1000;
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// Leap year calculations are rather trivial in this case ...
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int days = 365 * year + ((year+1)>>2);
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days += daysToMonthStart[mon];
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if ((year & 3) == 0 && mon > 1)
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days++;
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days += day;
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return (days * 24*60*60L + ((hrs * 60) + min) * 60 + sec) * 1000L;
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}
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public String toString () { return name; }
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/**
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* Returns the hashcode of the name of this ZipEntry.
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*/
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public int hashCode () { return name.hashCode (); }
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}
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