Java example source code file (ZipConstants.java)
The ZipConstants.java Java example source code/*
* Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This source code is provided to illustrate the usage of a given feature
* or technique and has been deliberately simplified. Additional steps
* required for a production-quality application, such as security checks,
* input validation and proper error handling, might not be present in
* this sample code.
*/
package com.sun.nio.zipfs;
/**
*
* @author Xueming Shen
*/
class ZipConstants {
/*
* Compression methods
*/
static final int METHOD_STORED = 0;
static final int METHOD_DEFLATED = 8;
static final int METHOD_DEFLATED64 = 9;
static final int METHOD_BZIP2 = 12;
static final int METHOD_LZMA = 14;
static final int METHOD_LZ77 = 19;
static final int METHOD_AES = 99;
/*
* General purpose big flag
*/
static final int FLAG_ENCRYPTED = 0x01;
static final int FLAG_DATADESCR = 0x08; // crc, size and csize in dd
static final int FLAG_EFS = 0x800; // If this bit is set the filename and
// comment fields for this file must be
// encoded using UTF-8.
/*
* Header signatures
*/
static long LOCSIG = 0x04034b50L; // "PK\003\004"
static long EXTSIG = 0x08074b50L; // "PK\007\008"
static long CENSIG = 0x02014b50L; // "PK\001\002"
static long ENDSIG = 0x06054b50L; // "PK\005\006"
/*
* Header sizes in bytes (including signatures)
*/
static final int LOCHDR = 30; // LOC header size
static final int EXTHDR = 16; // EXT header size
static final int CENHDR = 46; // CEN header size
static final int ENDHDR = 22; // END header size
/*
* Local file (LOC) header field offsets
*/
static final int LOCVER = 4; // version needed to extract
static final int LOCFLG = 6; // general purpose bit flag
static final int LOCHOW = 8; // compression method
static final int LOCTIM = 10; // modification time
static final int LOCCRC = 14; // uncompressed file crc-32 value
static final int LOCSIZ = 18; // compressed size
static final int LOCLEN = 22; // uncompressed size
static final int LOCNAM = 26; // filename length
static final int LOCEXT = 28; // extra field length
/*
* Extra local (EXT) header field offsets
*/
static final int EXTCRC = 4; // uncompressed file crc-32 value
static final int EXTSIZ = 8; // compressed size
static final int EXTLEN = 12; // uncompressed size
/*
* Central directory (CEN) header field offsets
*/
static final int CENVEM = 4; // version made by
static final int CENVER = 6; // version needed to extract
static final int CENFLG = 8; // encrypt, decrypt flags
static final int CENHOW = 10; // compression method
static final int CENTIM = 12; // modification time
static final int CENCRC = 16; // uncompressed file crc-32 value
static final int CENSIZ = 20; // compressed size
static final int CENLEN = 24; // uncompressed size
static final int CENNAM = 28; // filename length
static final int CENEXT = 30; // extra field length
static final int CENCOM = 32; // comment length
static final int CENDSK = 34; // disk number start
static final int CENATT = 36; // internal file attributes
static final int CENATX = 38; // external file attributes
static final int CENOFF = 42; // LOC header offset
/*
* End of central directory (END) header field offsets
*/
static final int ENDSUB = 8; // number of entries on this disk
static final int ENDTOT = 10; // total number of entries
static final int ENDSIZ = 12; // central directory size in bytes
static final int ENDOFF = 16; // offset of first CEN header
static final int ENDCOM = 20; // zip file comment length
/*
* ZIP64 constants
*/
static final long ZIP64_ENDSIG = 0x06064b50L; // "PK\006\006"
static final long ZIP64_LOCSIG = 0x07064b50L; // "PK\006\007"
static final int ZIP64_ENDHDR = 56; // ZIP64 end header size
static final int ZIP64_LOCHDR = 20; // ZIP64 end loc header size
static final int ZIP64_EXTHDR = 24; // EXT header size
static final int ZIP64_EXTID = 0x0001; // Extra field Zip64 header ID
static final int ZIP64_MINVAL32 = 0xFFFF;
static final long ZIP64_MINVAL = 0xFFFFFFFFL;
/*
* Zip64 End of central directory (END) header field offsets
*/
static final int ZIP64_ENDLEN = 4; // size of zip64 end of central dir
static final int ZIP64_ENDVEM = 12; // version made by
static final int ZIP64_ENDVER = 14; // version needed to extract
static final int ZIP64_ENDNMD = 16; // number of this disk
static final int ZIP64_ENDDSK = 20; // disk number of start
static final int ZIP64_ENDTOD = 24; // total number of entries on this disk
static final int ZIP64_ENDTOT = 32; // total number of entries
static final int ZIP64_ENDSIZ = 40; // central directory size in bytes
static final int ZIP64_ENDOFF = 48; // offset of first CEN header
static final int ZIP64_ENDEXT = 56; // zip64 extensible data sector
/*
* Zip64 End of central directory locator field offsets
*/
static final int ZIP64_LOCDSK = 4; // disk number start
static final int ZIP64_LOCOFF = 8; // offset of zip64 end
static final int ZIP64_LOCTOT = 16; // total number of disks
/*
* Zip64 Extra local (EXT) header field offsets
*/
static final int ZIP64_EXTCRC = 4; // uncompressed file crc-32 value
static final int ZIP64_EXTSIZ = 8; // compressed size, 8-byte
static final int ZIP64_EXTLEN = 16; // uncompressed size, 8-byte
/*
* Extra field header ID
*/
static final int EXTID_ZIP64 = 0x0001; // ZIP64
static final int EXTID_NTFS = 0x000a; // NTFS
static final int EXTID_UNIX = 0x000d; // UNIX
static final int EXTID_EFS = 0x0017; // Strong Encryption
static final int EXTID_EXTT = 0x5455; // Info-ZIP Extended Timestamp
/*
* fields access methods
*/
///////////////////////////////////////////////////////
static final int CH(byte[] b, int n) {
return Byte.toUnsignedInt(b[n]);
}
static final int SH(byte[] b, int n) {
return Byte.toUnsignedInt(b[n]) | (Byte.toUnsignedInt(b[n + 1]) << 8);
}
static final long LG(byte[] b, int n) {
return ((SH(b, n)) | (SH(b, n + 2) << 16)) & 0xffffffffL;
}
static final long LL(byte[] b, int n) {
return (LG(b, n)) | (LG(b, n + 4) << 32);
}
static final long GETSIG(byte[] b) {
return LG(b, 0);
}
// local file (LOC) header fields
static final long LOCSIG(byte[] b) { return LG(b, 0); } // signature
static final int LOCVER(byte[] b) { return SH(b, 4); } // version needed to extract
static final int LOCFLG(byte[] b) { return SH(b, 6); } // general purpose bit flags
static final int LOCHOW(byte[] b) { return SH(b, 8); } // compression method
static final long LOCTIM(byte[] b) { return LG(b, 10);} // modification time
static final long LOCCRC(byte[] b) { return LG(b, 14);} // crc of uncompressed data
static final long LOCSIZ(byte[] b) { return LG(b, 18);} // compressed data size
static final long LOCLEN(byte[] b) { return LG(b, 22);} // uncompressed data size
static final int LOCNAM(byte[] b) { return SH(b, 26);} // filename length
static final int LOCEXT(byte[] b) { return SH(b, 28);} // extra field length
// extra local (EXT) header fields
static final long EXTCRC(byte[] b) { return LG(b, 4);} // crc of uncompressed data
static final long EXTSIZ(byte[] b) { return LG(b, 8);} // compressed size
static final long EXTLEN(byte[] b) { return LG(b, 12);} // uncompressed size
// end of central directory header (END) fields
static final int ENDSUB(byte[] b) { return SH(b, 8); } // number of entries on this disk
static final int ENDTOT(byte[] b) { return SH(b, 10);} // total number of entries
static final long ENDSIZ(byte[] b) { return LG(b, 12);} // central directory size
static final long ENDOFF(byte[] b) { return LG(b, 16);} // central directory offset
static final int ENDCOM(byte[] b) { return SH(b, 20);} // size of zip file comment
static final int ENDCOM(byte[] b, int off) { return SH(b, off + 20);}
// zip64 end of central directory recoder fields
static final long ZIP64_ENDTOD(byte[] b) { return LL(b, 24);} // total number of entries on disk
static final long ZIP64_ENDTOT(byte[] b) { return LL(b, 32);} // total number of entries
static final long ZIP64_ENDSIZ(byte[] b) { return LL(b, 40);} // central directory size
static final long ZIP64_ENDOFF(byte[] b) { return LL(b, 48);} // central directory offset
static final long ZIP64_LOCOFF(byte[] b) { return LL(b, 8);} // zip64 end offset
// central directory header (CEN) fields
static final long CENSIG(byte[] b, int pos) { return LG(b, pos + 0); }
static final int CENVEM(byte[] b, int pos) { return SH(b, pos + 4); }
static final int CENVER(byte[] b, int pos) { return SH(b, pos + 6); }
static final int CENFLG(byte[] b, int pos) { return SH(b, pos + 8); }
static final int CENHOW(byte[] b, int pos) { return SH(b, pos + 10);}
static final long CENTIM(byte[] b, int pos) { return LG(b, pos + 12);}
static final long CENCRC(byte[] b, int pos) { return LG(b, pos + 16);}
static final long CENSIZ(byte[] b, int pos) { return LG(b, pos + 20);}
static final long CENLEN(byte[] b, int pos) { return LG(b, pos + 24);}
static final int CENNAM(byte[] b, int pos) { return SH(b, pos + 28);}
static final int CENEXT(byte[] b, int pos) { return SH(b, pos + 30);}
static final int CENCOM(byte[] b, int pos) { return SH(b, pos + 32);}
static final int CENDSK(byte[] b, int pos) { return SH(b, pos + 34);}
static final int CENATT(byte[] b, int pos) { return SH(b, pos + 36);}
static final long CENATX(byte[] b, int pos) { return LG(b, pos + 38);}
static final long CENOFF(byte[] b, int pos) { return LG(b, pos + 42);}
/* The END header is followed by a variable length comment of size < 64k. */
static final long END_MAXLEN = 0xFFFF + ENDHDR;
static final int READBLOCKSZ = 128;
}
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