Java example source code file (zip_util.h)
The zip_util.h Java example source code/*
* Copyright (c) 1995, 2013, 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.
*/
/*
* Prototypes for zip file support
*/
#ifndef _ZIP_H_
#define _ZIP_H_
/*
* Header signatures
*/
#define LOCSIG 0x04034b50L /* "PK\003\004" */
#define EXTSIG 0x08074b50L /* "PK\007\008" */
#define CENSIG 0x02014b50L /* "PK\001\002" */
#define ENDSIG 0x06054b50L /* "PK\005\006" */
#define ZIP64_ENDSIG 0x06064b50L /* "PK\006\006" */
#define ZIP64_LOCSIG 0x07064b50L /* "PK\006\007" */
/*
* Header sizes including signatures
*/
#define LOCHDR 30
#define EXTHDR 16
#define CENHDR 46
#define ENDHDR 22
#define ZIP64_ENDHDR 56 // ZIP64 end header size
#define ZIP64_LOCHDR 20 // ZIP64 end loc header size
#define ZIP64_EXTHDR 24 // EXT header size
#define ZIP64_EXTID 1 // Extra field Zip64 header ID
#define ZIP64_MAGICVAL 0xffffffffLL
#define ZIP64_MAGICCOUNT 0xffff
/*
* Header field access macros
*/
#define CH(b, n) (((unsigned char *)(b))[n])
#define SH(b, n) (CH(b, n) | (CH(b, n+1) << 8))
#define LG(b, n) ((SH(b, n) | (SH(b, n+2) << 16)) &0xffffffffUL)
#define LL(b, n) (((jlong)LG(b, n)) | (((jlong)LG(b, n+4)) << 32))
#define GETSIG(b) LG(b, 0)
/*
* 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 */
/*
* Supported compression methods
*/
#define STORED 0
#define DEFLATED 8
/*
* 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.
*/
typedef struct 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 */
} 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.
*/
typedef struct jzcell {
unsigned int hash; /* 32 bit hashcode on name */
unsigned int next; /* hash chain: index into jzfile->entries */
jlong cenpos; /* Offset of central directory file header */
} jzcell;
typedef struct 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.
*/
typedef struct 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
unsigned char *maddr; /* beginning address of the CEN & ENDHDR */
jlong mlen; /* length (in bytes) mmaped */
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)
jzentry * JNICALL
ZIP_FindEntry(jzfile *zip, char *name, jint *sizeP, jint *nameLenP);
jboolean JNICALL
ZIP_ReadEntry(jzfile *zip, jzentry *entry, unsigned char *buf, char *entrynm);
jzentry * JNICALL
ZIP_GetNextEntry(jzfile *zip, jint n);
jzfile * JNICALL
ZIP_Open(const char *name, char **pmsg);
jzfile *
ZIP_Open_Generic(const char *name, char **pmsg, int mode, jlong lastModified);
jzfile *
ZIP_Get_From_Cache(const char *name, char **pmsg, jlong lastModified);
jzfile *
ZIP_Put_In_Cache(const char *name, ZFILE zfd, char **pmsg, jlong lastModified);
jzfile *
ZIP_Put_In_Cache0(const char *name, ZFILE zfd, char **pmsg, jlong lastModified, jboolean usemmap);
void JNICALL
ZIP_Close(jzfile *zip);
jzentry * ZIP_GetEntry(jzfile *zip, char *name, jint ulen);
void ZIP_Lock(jzfile *zip);
void ZIP_Unlock(jzfile *zip);
jint ZIP_Read(jzfile *zip, jzentry *entry, jlong pos, void *buf, jint len);
void ZIP_FreeEntry(jzfile *zip, jzentry *ze);
jlong ZIP_GetEntryDataOffset(jzfile *zip, jzentry *entry);
#endif /* !_ZIP_H_ */
Other Java examples (source code examples)Here is a short list of links related to this Java zip_util.h source code file: |
The search page
Other Java source code examples at this package level
Click here to learn more about this project
