/* * Copyright (c) 1995, 2022, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions.
*/
/* * Macros for getting local file (LOC) header fields
*/ #define LOCVER(b) SH(b, 4) /* version needed to extract */ #define LOCFLG(b) SH(b, 6) /* general purpose bit flags */ #define LOCHOW(b) SH(b, 8) /* compression method */ #define LOCTIM(b) LG(b, 10) /* modification time */ #define LOCCRC(b) LG(b, 14) /* crc of uncompressed data */ #define LOCSIZ(b) LG(b, 18) /* compressed data size */ #define LOCLEN(b) LG(b, 22) /* uncompressed data size */ #define LOCNAM(b) SH(b, 26) /* filename length */ #define LOCEXT(b) SH(b, 28) /* extra field length */
/* * Macros for getting extra local (EXT) header fields
*/ #define EXTCRC(b) LG(b, 4) /* crc of uncompressed data */ #define EXTSIZ(b) LG(b, 8) /* compressed size */ #define EXTLEN(b) LG(b, 12) /* uncompressed size */
/* * Macros for getting central directory header (CEN) fields
*/ #define CENVEM(b) SH(b, 4) /* version made by */ #define CENVER(b) SH(b, 6) /* version needed to extract */ #define CENFLG(b) SH(b, 8) /* general purpose bit flags */ #define CENHOW(b) SH(b, 10) /* compression method */ #define CENTIM(b) LG(b, 12) /* modification time */ #define CENCRC(b) LG(b, 16) /* crc of uncompressed data */ #define CENSIZ(b) LG(b, 20) /* compressed size */ #define CENLEN(b) LG(b, 24) /* uncompressed size */ #define CENNAM(b) SH(b, 28) /* length of filename */ #define CENEXT(b) SH(b, 30) /* length of extra field */ #define CENCOM(b) SH(b, 32) /* file comment length */ #define CENDSK(b) SH(b, 34) /* disk number start */ #define CENATT(b) SH(b, 36) /* internal file attributes */ #define CENATX(b) LG(b, 38) /* external file attributes */ #define CENOFF(b) LG(b, 42) /* offset of local header */
/* * Macros for getting end of central directory header (END) fields
*/ #define ENDSUB(b) SH(b, 8) /* number of entries on this disk */ #define ENDTOT(b) SH(b, 10) /* total number of entries */ #define ENDSIZ(b) LG(b, 12) /* central directory size */ #define ENDOFF(b) LG(b, 16) /* central directory offset */ #define ENDCOM(b) SH(b, 20) /* size of zip file comment */
/* * Macros for getting Zip64 end of central directory header fields
*/ #define ZIP64_ENDLEN(b) LL(b, 4) /* size of zip64 end of central dir */ #define ZIP64_ENDVEM(b) SH(b, 12) /* version made by */ #define ZIP64_ENDVER(b) SH(b, 14) /* version needed to extract */ #define ZIP64_ENDNMD(b) LG(b, 16) /* number of this disk */ #define ZIP64_ENDDSK(b) LG(b, 20) /* disk number of start */ #define ZIP64_ENDTOD(b) LL(b, 24) /* total number of entries on this disk */ #define ZIP64_ENDTOT(b) LL(b, 32) /* total number of entries */ #define ZIP64_ENDSIZ(b) LL(b, 40) /* central directory size in bytes */ #define ZIP64_ENDOFF(b) LL(b, 48) /* offset of first CEN header */
/* * Macros for getting Zip64 end of central directory locator fields
*/ #define ZIP64_LOCDSK(b) LG(b, 4) /* disk number start */ #define ZIP64_LOCOFF(b) LL(b, 8) /* offset of zip64 end */ #define ZIP64_LOCTOT(b) LG(b, 16) /* total number of disks */
/* * Support for reading ZIP/JAR files. Some things worth noting: * * - Zip file entries larger than 2**32 bytes are not supported. * - jzentry time and crc fields are signed even though they really * represent unsigned quantities. * - If csize is zero then the entry is uncompressed. * - If extra != 0 then the first two bytes are the length of the extra * data in intel byte order. * - If pos <= 0 then it is the position of entry LOC header. * If pos > 0 then it is the position of entry data. * pos should not be accessed directly, but only by ZIP_GetEntryDataOffset. * - entry name may include embedded null character, use nlen for length
*/
typedefstruct jzentry { /* Zip file entry */ char *name; /* entry name */
jlong time; /* modification time */
jlong size; /* size of uncompressed data */
jlong csize; /* size of compressed data (zero if uncompressed) */
jint crc; /* crc of uncompressed data */ char *comment; /* optional zip file comment */
jbyte *extra; /* optional extra data */
jlong pos; /* position of LOC header or entry data */
jint flag; /* general purpose flag */
jint nlen; /* length of the entry name */
} jzentry;
/* * In-memory hash table cell. * In a typical system we have a *lot* of these, as we have one for * every entry in every active JAR. * Note that in order to save space we don't keep the name in memory, * but merely remember a 32 bit hash.
*/ typedefstruct jzcell { unsignedint hash; /* 32 bit hashcode on name */ unsignedint next; /* hash chain: index into jzfile->entries */
jlong cenpos; /* Offset of central directory file header */
} jzcell;
typedefstruct cencache { char *data; /* A cached page of CEN headers */
jlong pos; /* file offset of data */
} cencache;
/* * Use ZFILE to represent access to a file in a platform-indepenent * fashion.
*/ #ifdef WIN32 #define ZFILE jlong #else #define ZFILE int #endif
/* * Descriptor for a ZIP file.
*/ typedefstruct jzfile { /* Zip file */ char *name; /* zip file name */
jint refs; /* number of active references */
jlong len; /* length (in bytes) of zip file */ #ifdef USE_MMAP unsignedchar *maddr; /* beginning address of the CEN & ENDHDR */
jlong mlen; /* length (in bytes) mmapped */
jlong offset; /* offset of the mmapped region from the
start of the file. */
jboolean usemmap; /* if mmap is used. */ #endif
jboolean locsig; /* if zip file starts with LOCSIG */
cencache cencache; /* CEN header cache */
ZFILE zfd; /* open file descriptor */ void *lock; /* read lock */ char *comment; /* zip file comment */
jint clen; /* length of the zip file comment */ char *msg; /* zip error message */
jzcell *entries; /* array of hash cells */
jint total; /* total number of entries */
jint *table; /* Hash chain heads: indexes into entries */
jint tablelen; /* number of hash heads */ struct jzfile *next; /* next zip file in search list */
jzentry *cache; /* we cache the most recently freed jzentry */ /* Information on metadata names in META-INF directory */ char **metanames; /* array of meta names (may have null names) */
jint metacurrent; /* the next empty slot in metanames array */
jint metacount; /* number of slots in metanames array */
jlong lastModified; /* last modified time */
jlong locpos; /* position of first LOC header (usually 0) */
} jzfile;
/* * Index representing end of hash chain
*/ #define ZIP_ENDCHAIN ((jint)-1)
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