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zip.c
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/* zip.c -- IO on .zip files using zlib
Version 1.1, February 14h, 2010
part of the MiniZip project - ( http://www.winimage.com/zLibDll/minizip.html )
Copyright (C) 1998-2010 Gilles Vollant (minizip) ( http://www.winimage.com/zLibDll/minizip.html )
Modifications for Zip64 support
Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )
For more info read MiniZip_info.txt
Changes
Oct-2009 - Mathias Svensson - Remove old C style function prototypes
Oct-2009 - Mathias Svensson - Added Zip64 Support when creating new file archives
Oct-2009 - Mathias Svensson - Did some code cleanup and refactoring to get better overview of some functions.
Oct-2009 - Mathias Svensson - Added zipRemoveExtraInfoBlock to strip extra field data from its ZIP64 data
It is used when recreting zip archive with RAW when deleting items from a zip.
ZIP64 data is automaticly added to items that needs it, and existing ZIP64 data need to be removed.
Oct-2009 - Mathias Svensson - Added support for BZIP2 as compression mode (bzip2 lib is required)
Jan-2010 - back to unzip and minizip 1.0 name scheme, with compatibility layer
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "zlib.h"
#include "zip.h"
#ifdef STDC
# include <stddef.h>
# include <string.h>
# include <stdlib.h>
#endif
#ifdef NO_ERRNO_H
extern int errno;
#else
# include <errno.h>
#endif
#ifndef local
# define local static
#endif
/* compile with -Dlocal if your debugger can't find static symbols */
#ifndef VERSIONMADEBY
# define VERSIONMADEBY (0x0) /* platform depedent */
#endif
#ifndef Z_BUFSIZE
#define Z_BUFSIZE (64*1024) //(16384)
#endif
#ifndef Z_MAXFILENAMEINZIP
#define Z_MAXFILENAMEINZIP (256)
#endif
#ifndef ALLOC
# define ALLOC(size) (malloc(size))
#endif
#ifndef TRYFREE
# define TRYFREE(p) {if (p) free(p);}
#endif
/*
#define SIZECENTRALDIRITEM (0x2e)
#define SIZEZIPLOCALHEADER (0x1e)
*/
/* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */
// NOT sure that this work on ALL platform
#define MAKEULONG64(a, b) ((ZPOS64_T)(((unsigned long)(a)) | ((ZPOS64_T)((unsigned long)(b))) << 32))
#ifndef SEEK_CUR
#define SEEK_CUR 1
#endif
#ifndef SEEK_END
#define SEEK_END 2
#endif
#ifndef SEEK_SET
#define SEEK_SET 0
#endif
#ifndef DEF_MEM_LEVEL
#if MAX_MEM_LEVEL >= 8
# define DEF_MEM_LEVEL 8
#else
# define DEF_MEM_LEVEL MAX_MEM_LEVEL
#endif
#endif
const char zip_copyright[] =" zip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll";
#define SIZEDATA_INDATABLOCK (4096-(4*4))
#define LOCALHEADERMAGIC (0x04034b50)
#define CENTRALHEADERMAGIC (0x02014b50)
#define ENDHEADERMAGIC (0x06054b50)
#define ZIP64ENDHEADERMAGIC (0x6064b50)
#define ZIP64ENDLOCHEADERMAGIC (0x7064b50)
#define FLAG_LOCALHEADER_OFFSET (0x06)
#define CRC_LOCALHEADER_OFFSET (0x0e)
#define SIZECENTRALHEADER (0x2e) /* 46 */
typedef struct linkedlist_datablock_internal_s
{
struct linkedlist_datablock_internal_s* next_datablock;
uLong avail_in_this_block;
uLong filled_in_this_block;
uLong unused; /* for future use and alignement */
unsigned char data[SIZEDATA_INDATABLOCK];
} linkedlist_datablock_internal;
typedef struct linkedlist_data_s
{
linkedlist_datablock_internal* first_block;
linkedlist_datablock_internal* last_block;
} linkedlist_data;
typedef struct
{
z_stream stream; /* zLib stream structure for inflate */
#ifdef HAVE_BZIP2
bz_stream bstream; /* bzLib stream structure for bziped */
#endif
int stream_initialised; /* 1 is stream is initialised */
uInt pos_in_buffered_data; /* last written byte in buffered_data */
ZPOS64_T pos_local_header; /* offset of the local header of the file
currenty writing */
char* central_header; /* central header data for the current file */
uLong size_centralExtra;
uLong size_centralheader; /* size of the central header for cur file */
uLong size_centralExtraFree; /* Extra bytes allocated to the centralheader but that are not used */
uLong flag; /* flag of the file currently writing */
int method; /* compression method of file currenty wr.*/
int raw; /* 1 for directly writing raw data */
Byte buffered_data[Z_BUFSIZE];/* buffer contain compressed data to be writ*/
uLong dosDate;
uLong crc32;
int encrypt;
int zip64; /* Add ZIP64 extened information in the extra field */
ZPOS64_T pos_zip64extrainfo;
ZPOS64_T totalCompressedData;
ZPOS64_T totalUncompressedData;
#ifndef NOCRYPT
unsigned long keys[3]; /* keys defining the pseudo-random sequence */
const z_crc_t* pcrc_32_tab;
int crypt_header_size;
#endif
} curfile64_info;
typedef struct
{
zlib_filefunc64_32_def z_filefunc;
voidpf filestream; /* io structore of the zipfile */
linkedlist_data central_dir;/* datablock with central dir in construction*/
int in_opened_file_inzip; /* 1 if a file in the zip is currently writ.*/
curfile64_info ci; /* info on the file curretly writing */
ZPOS64_T begin_pos; /* position of the beginning of the zipfile */
ZPOS64_T add_position_when_writting_offset;
ZPOS64_T number_entry;
#ifndef NO_ADDFILEINEXISTINGZIP
char *globalcomment;
#endif
} zip64_internal;
#ifndef NOCRYPT
#define INCLUDECRYPTINGCODE_IFCRYPTALLOWED
#include "crypt.h"
#endif
local linkedlist_datablock_internal* allocate_new_datablock()
{
linkedlist_datablock_internal* ldi;
ldi = (linkedlist_datablock_internal*)
ALLOC(sizeof(linkedlist_datablock_internal));
if (ldi!=NULL)
{
ldi->next_datablock = NULL ;
ldi->filled_in_this_block = 0 ;
ldi->avail_in_this_block = SIZEDATA_INDATABLOCK ;
}
return ldi;
}
local void free_datablock(linkedlist_datablock_internal* ldi)
{
while (ldi!=NULL)
{
linkedlist_datablock_internal* ldinext = ldi->next_datablock;
TRYFREE(ldi);
ldi = ldinext;
}
}
local void init_linkedlist(linkedlist_data* ll)
{
ll->first_block = ll->last_block = NULL;
}
local void free_linkedlist(linkedlist_data* ll)
{
free_datablock(ll->first_block);
ll->first_block = ll->last_block = NULL;
}
local int add_data_in_datablock(linkedlist_data* ll, const void* buf, uLong len)
{
linkedlist_datablock_internal* ldi;
const unsigned char* from_copy;
if (ll==NULL)
return ZIP_INTERNALERROR;
if (ll->last_block == NULL)
{
ll->first_block = ll->last_block = allocate_new_datablock();
if (ll->first_block == NULL)
return ZIP_INTERNALERROR;
}
ldi = ll->last_block;
from_copy = (unsigned char*)buf;
while (len>0)
{
uInt copy_this;
uInt i;
unsigned char* to_copy;
if (ldi->avail_in_this_block==0)
{
ldi->next_datablock = allocate_new_datablock();
if (ldi->next_datablock == NULL)
return ZIP_INTERNALERROR;
ldi = ldi->next_datablock ;
ll->last_block = ldi;
}
if (ldi->avail_in_this_block < len)
copy_this = (uInt)ldi->avail_in_this_block;
else
copy_this = (uInt)len;
to_copy = &(ldi->data[ldi->filled_in_this_block]);
for (i=0;i<copy_this;i++)
*(to_copy+i)=*(from_copy+i);
ldi->filled_in_this_block += copy_this;
ldi->avail_in_this_block -= copy_this;
from_copy += copy_this ;
len -= copy_this;
}
return ZIP_OK;
}
/****************************************************************************/
#ifndef NO_ADDFILEINEXISTINGZIP
/* ===========================================================================
Inputs a long in LSB order to the given file
nbByte == 1, 2 ,4 or 8 (byte, short or long, ZPOS64_T)
*/
local int zip64local_putValue OF((const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, ZPOS64_T x, int nbByte));
local int zip64local_putValue (const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, ZPOS64_T x, int nbByte)
{
unsigned char buf[8];
int n;
for (n = 0; n < nbByte; n++)
{
buf[n] = (unsigned char)(x & 0xff);
x >>= 8;
}
if (x != 0)
{ /* data overflow - hack for ZIP64 (X Roche) */
for (n = 0; n < nbByte; n++)
{
buf[n] = 0xff;
}
}
if (ZWRITE64(*pzlib_filefunc_def,filestream,buf,nbByte)!=(uLong)nbByte)
return ZIP_ERRNO;
else
return ZIP_OK;
}
local void zip64local_putValue_inmemory OF((void* dest, ZPOS64_T x, int nbByte));
local void zip64local_putValue_inmemory (void* dest, ZPOS64_T x, int nbByte)
{
unsigned char* buf=(unsigned char*)dest;
int n;
for (n = 0; n < nbByte; n++) {
buf[n] = (unsigned char)(x & 0xff);
x >>= 8;
}
if (x != 0)
{ /* data overflow - hack for ZIP64 */
for (n = 0; n < nbByte; n++)
{
buf[n] = 0xff;
}
}
}
/****************************************************************************/
local uLong zip64local_TmzDateToDosDate(const tm_zip* ptm)
{
uLong year = (uLong)ptm->tm_year;
if (year>=1980)
year-=1980;
else if (year>=80)
year-=80;
return
(uLong) (((ptm->tm_mday) + (32 * (ptm->tm_mon+1)) + (512 * year)) << 16) |
((ptm->tm_sec/2) + (32* ptm->tm_min) + (2048 * (uLong)ptm->tm_hour));
}
/****************************************************************************/
local int zip64local_getByte OF((const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, int *pi));
local int zip64local_getByte(const zlib_filefunc64_32_def* pzlib_filefunc_def,voidpf filestream,int* pi)
{
unsigned char c;
int err = (int)ZREAD64(*pzlib_filefunc_def,filestream,&c,1);
if (err==1)
{
*pi = (int)c;
return ZIP_OK;
}
else
{
if (ZERROR64(*pzlib_filefunc_def,filestream))
return ZIP_ERRNO;
else
return ZIP_EOF;
}
}
/* ===========================================================================
Reads a long in LSB order from the given gz_stream. Sets
*/
local int zip64local_getShort OF((const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, uLong *pX));
local int zip64local_getShort (const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, uLong* pX)
{
uLong x ;
int i = 0;
int err;
err = zip64local_getByte(pzlib_filefunc_def,filestream,&i);
x = (uLong)i;
if (err==ZIP_OK)
err = zip64local_getByte(pzlib_filefunc_def,filestream,&i);
x += ((uLong)i)<<8;
if (err==ZIP_OK)
*pX = x;
else
*pX = 0;
return err;
}
local int zip64local_getLong OF((const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, uLong *pX));
local int zip64local_getLong (const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, uLong* pX)
{
uLong x ;
int i = 0;
int err;
err = zip64local_getByte(pzlib_filefunc_def,filestream,&i);
x = (uLong)i;
if (err==ZIP_OK)
err = zip64local_getByte(pzlib_filefunc_def,filestream,&i);
x += ((uLong)i)<<8;
if (err==ZIP_OK)
err = zip64local_getByte(pzlib_filefunc_def,filestream,&i);
x += ((uLong)i)<<16;
if (err==ZIP_OK)
err = zip64local_getByte(pzlib_filefunc_def,filestream,&i);
x += ((uLong)i)<<24;
if (err==ZIP_OK)
*pX = x;
else
*pX = 0;
return err;
}
local int zip64local_getLong64 OF((const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, ZPOS64_T *pX));
local int zip64local_getLong64 (const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, ZPOS64_T *pX)
{
ZPOS64_T x;
int i = 0;
int err;
err = zip64local_getByte(pzlib_filefunc_def,filestream,&i);
x = (ZPOS64_T)i;
if (err==ZIP_OK)
err = zip64local_getByte(pzlib_filefunc_def,filestream,&i);
x += ((ZPOS64_T)i)<<8;
if (err==ZIP_OK)
err = zip64local_getByte(pzlib_filefunc_def,filestream,&i);
x += ((ZPOS64_T)i)<<16;
if (err==ZIP_OK)
err = zip64local_getByte(pzlib_filefunc_def,filestream,&i);
x += ((ZPOS64_T)i)<<24;
if (err==ZIP_OK)
err = zip64local_getByte(pzlib_filefunc_def,filestream,&i);
x += ((ZPOS64_T)i)<<32;
if (err==ZIP_OK)
err = zip64local_getByte(pzlib_filefunc_def,filestream,&i);
x += ((ZPOS64_T)i)<<40;
if (err==ZIP_OK)
err = zip64local_getByte(pzlib_filefunc_def,filestream,&i);
x += ((ZPOS64_T)i)<<48;
if (err==ZIP_OK)
err = zip64local_getByte(pzlib_filefunc_def,filestream,&i);
x += ((ZPOS64_T)i)<<56;
if (err==ZIP_OK)
*pX = x;
else
*pX = 0;
return err;
}
#ifndef BUFREADCOMMENT
#define BUFREADCOMMENT (0x400)
#endif
/*
Locate the Central directory of a zipfile (at the end, just before
the global comment)
*/
local ZPOS64_T zip64local_SearchCentralDir OF((const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream));
local ZPOS64_T zip64local_SearchCentralDir(const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream)
{
unsigned char* buf;
ZPOS64_T uSizeFile;
ZPOS64_T uBackRead;
ZPOS64_T uMaxBack=0xffff; /* maximum size of global comment */
ZPOS64_T uPosFound=0;
if (ZSEEK64(*pzlib_filefunc_def,filestream,0,ZLIB_FILEFUNC_SEEK_END) != 0)
return 0;
uSizeFile = ZTELL64(*pzlib_filefunc_def,filestream);
if (uMaxBack>uSizeFile)
uMaxBack = uSizeFile;
buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
if (buf==NULL)
return 0;
uBackRead = 4;
while (uBackRead<uMaxBack)
{
uLong uReadSize;
ZPOS64_T uReadPos ;
int i;
if (uBackRead+BUFREADCOMMENT>uMaxBack)
uBackRead = uMaxBack;
else
uBackRead+=BUFREADCOMMENT;
uReadPos = uSizeFile-uBackRead ;
uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ?
(BUFREADCOMMENT+4) : (uLong)(uSizeFile-uReadPos);
if (ZSEEK64(*pzlib_filefunc_def,filestream,uReadPos,ZLIB_FILEFUNC_SEEK_SET)!=0)
break;
if (ZREAD64(*pzlib_filefunc_def,filestream,buf,uReadSize)!=uReadSize)
break;
for (i=(int)uReadSize-3; (i--)>0;)
if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06))
{
uPosFound = uReadPos+i;
break;
}
if (uPosFound!=0)
break;
}
TRYFREE(buf);
return uPosFound;
}
/*
Locate the End of Zip64 Central directory locator and from there find the CD of a zipfile (at the end, just before
the global comment)
*/
local ZPOS64_T zip64local_SearchCentralDir64 OF((const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream));
local ZPOS64_T zip64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream)
{
unsigned char* buf;
ZPOS64_T uSizeFile;
ZPOS64_T uBackRead;
ZPOS64_T uMaxBack=0xffff; /* maximum size of global comment */
ZPOS64_T uPosFound=0;
uLong uL;
ZPOS64_T relativeOffset;
if (ZSEEK64(*pzlib_filefunc_def,filestream,0,ZLIB_FILEFUNC_SEEK_END) != 0)
return 0;
uSizeFile = ZTELL64(*pzlib_filefunc_def,filestream);
if (uMaxBack>uSizeFile)
uMaxBack = uSizeFile;
buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
if (buf==NULL)
return 0;
uBackRead = 4;
while (uBackRead<uMaxBack)
{
uLong uReadSize;
ZPOS64_T uReadPos;
int i;
if (uBackRead+BUFREADCOMMENT>uMaxBack)
uBackRead = uMaxBack;
else
uBackRead+=BUFREADCOMMENT;
uReadPos = uSizeFile-uBackRead ;
uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ?
(BUFREADCOMMENT+4) : (uLong)(uSizeFile-uReadPos);
if (ZSEEK64(*pzlib_filefunc_def,filestream,uReadPos,ZLIB_FILEFUNC_SEEK_SET)!=0)
break;
if (ZREAD64(*pzlib_filefunc_def,filestream,buf,uReadSize)!=uReadSize)
break;
for (i=(int)uReadSize-3; (i--)>0;)
{
// Signature "0x07064b50" Zip64 end of central directory locater
if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) && ((*(buf+i+2))==0x06) && ((*(buf+i+3))==0x07))
{
uPosFound = uReadPos+i;
break;
}
}
if (uPosFound!=0)
break;
}
TRYFREE(buf);
if (uPosFound == 0)
return 0;
/* Zip64 end of central directory locator */
if (ZSEEK64(*pzlib_filefunc_def,filestream, uPosFound,ZLIB_FILEFUNC_SEEK_SET)!=0)
return 0;
/* the signature, already checked */
if (zip64local_getLong(pzlib_filefunc_def,filestream,&uL)!=ZIP_OK)
return 0;
/* number of the disk with the start of the zip64 end of central directory */
if (zip64local_getLong(pzlib_filefunc_def,filestream,&uL)!=ZIP_OK)
return 0;
if (uL != 0)
return 0;
/* relative offset of the zip64 end of central directory record */
if (zip64local_getLong64(pzlib_filefunc_def,filestream,&relativeOffset)!=ZIP_OK)
return 0;
/* total number of disks */
if (zip64local_getLong(pzlib_filefunc_def,filestream,&uL)!=ZIP_OK)
return 0;
if (uL != 1)
return 0;
/* Goto Zip64 end of central directory record */
if (ZSEEK64(*pzlib_filefunc_def,filestream, relativeOffset,ZLIB_FILEFUNC_SEEK_SET)!=0)
return 0;
/* the signature */
if (zip64local_getLong(pzlib_filefunc_def,filestream,&uL)!=ZIP_OK)
return 0;
if (uL != 0x06064b50) // signature of 'Zip64 end of central directory'
return 0;
return relativeOffset;
}
int LoadCentralDirectoryRecord(zip64_internal* pziinit)
{
int err=ZIP_OK;
ZPOS64_T byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
ZPOS64_T size_central_dir; /* size of the central directory */
ZPOS64_T offset_central_dir; /* offset of start of central directory */
ZPOS64_T central_pos;
uLong uL;
uLong number_disk; /* number of the current dist, used for
spaning ZIP, unsupported, always 0*/
uLong number_disk_with_CD; /* number the the disk with central dir, used
for spaning ZIP, unsupported, always 0*/
ZPOS64_T number_entry;
ZPOS64_T number_entry_CD; /* total number of entries in
the central dir
(same than number_entry on nospan) */
uLong VersionMadeBy;
uLong VersionNeeded;
uLong size_comment;
int hasZIP64Record = 0;
// check first if we find a ZIP64 record
central_pos = zip64local_SearchCentralDir64(&pziinit->z_filefunc,pziinit->filestream);
if(central_pos > 0)
{
hasZIP64Record = 1;
}
else if(central_pos == 0)
{
central_pos = zip64local_SearchCentralDir(&pziinit->z_filefunc,pziinit->filestream);
}
/* disable to allow appending to empty ZIP archive
if (central_pos==0)
err=ZIP_ERRNO;
*/
if(hasZIP64Record)
{
ZPOS64_T sizeEndOfCentralDirectory;
if (ZSEEK64(pziinit->z_filefunc, pziinit->filestream, central_pos, ZLIB_FILEFUNC_SEEK_SET) != 0)
err=ZIP_ERRNO;
/* the signature, already checked */
if (zip64local_getLong(&pziinit->z_filefunc, pziinit->filestream,&uL)!=ZIP_OK)
err=ZIP_ERRNO;
/* size of zip64 end of central directory record */
if (zip64local_getLong64(&pziinit->z_filefunc, pziinit->filestream, &sizeEndOfCentralDirectory)!=ZIP_OK)
err=ZIP_ERRNO;
/* version made by */
if (zip64local_getShort(&pziinit->z_filefunc, pziinit->filestream, &VersionMadeBy)!=ZIP_OK)
err=ZIP_ERRNO;
/* version needed to extract */
if (zip64local_getShort(&pziinit->z_filefunc, pziinit->filestream, &VersionNeeded)!=ZIP_OK)
err=ZIP_ERRNO;
/* number of this disk */
if (zip64local_getLong(&pziinit->z_filefunc, pziinit->filestream,&number_disk)!=ZIP_OK)
err=ZIP_ERRNO;
/* number of the disk with the start of the central directory */
if (zip64local_getLong(&pziinit->z_filefunc, pziinit->filestream,&number_disk_with_CD)!=ZIP_OK)
err=ZIP_ERRNO;
/* total number of entries in the central directory on this disk */
if (zip64local_getLong64(&pziinit->z_filefunc, pziinit->filestream, &number_entry)!=ZIP_OK)
err=ZIP_ERRNO;
/* total number of entries in the central directory */
if (zip64local_getLong64(&pziinit->z_filefunc, pziinit->filestream,&number_entry_CD)!=ZIP_OK)
err=ZIP_ERRNO;
if ((number_entry_CD!=number_entry) || (number_disk_with_CD!=0) || (number_disk!=0))
err=ZIP_BADZIPFILE;
/* size of the central directory */
if (zip64local_getLong64(&pziinit->z_filefunc, pziinit->filestream,&size_central_dir)!=ZIP_OK)
err=ZIP_ERRNO;
/* offset of start of central directory with respect to the
starting disk number */
if (zip64local_getLong64(&pziinit->z_filefunc, pziinit->filestream,&offset_central_dir)!=ZIP_OK)
err=ZIP_ERRNO;
// TODO..
// read the comment from the standard central header.
size_comment = 0;
}
else
{
// Read End of central Directory info
if (ZSEEK64(pziinit->z_filefunc, pziinit->filestream, central_pos,ZLIB_FILEFUNC_SEEK_SET)!=0)
err=ZIP_ERRNO;
/* the signature, already checked */
if (zip64local_getLong(&pziinit->z_filefunc, pziinit->filestream,&uL)!=ZIP_OK)
err=ZIP_ERRNO;
/* number of this disk */
if (zip64local_getShort(&pziinit->z_filefunc, pziinit->filestream,&number_disk)!=ZIP_OK)
err=ZIP_ERRNO;
/* number of the disk with the start of the central directory */
if (zip64local_getShort(&pziinit->z_filefunc, pziinit->filestream,&number_disk_with_CD)!=ZIP_OK)
err=ZIP_ERRNO;
/* total number of entries in the central dir on this disk */
number_entry = 0;
if (zip64local_getShort(&pziinit->z_filefunc, pziinit->filestream, &uL)!=ZIP_OK)
err=ZIP_ERRNO;
else
number_entry = uL;
/* total number of entries in the central dir */
number_entry_CD = 0;
if (zip64local_getShort(&pziinit->z_filefunc, pziinit->filestream, &uL)!=ZIP_OK)
err=ZIP_ERRNO;
else
number_entry_CD = uL;
if ((number_entry_CD!=number_entry) || (number_disk_with_CD!=0) || (number_disk!=0))
err=ZIP_BADZIPFILE;
/* size of the central directory */
size_central_dir = 0;
if (zip64local_getLong(&pziinit->z_filefunc, pziinit->filestream, &uL)!=ZIP_OK)
err=ZIP_ERRNO;
else
size_central_dir = uL;
/* offset of start of central directory with respect to the starting disk number */
offset_central_dir = 0;
if (zip64local_getLong(&pziinit->z_filefunc, pziinit->filestream, &uL)!=ZIP_OK)
err=ZIP_ERRNO;
else
offset_central_dir = uL;
/* zipfile global comment length */
if (zip64local_getShort(&pziinit->z_filefunc, pziinit->filestream, &size_comment)!=ZIP_OK)
err=ZIP_ERRNO;
}
if ((central_pos<offset_central_dir+size_central_dir) &&
(err==ZIP_OK))
err=ZIP_BADZIPFILE;
if (err!=ZIP_OK)
{
ZCLOSE64(pziinit->z_filefunc, pziinit->filestream);
return ZIP_ERRNO;
}
if (size_comment>0)
{
pziinit->globalcomment = (char*)ALLOC(size_comment+1);
if (pziinit->globalcomment)
{
size_comment = ZREAD64(pziinit->z_filefunc, pziinit->filestream, pziinit->globalcomment,size_comment);
pziinit->globalcomment[size_comment]=0;
}
}
byte_before_the_zipfile = central_pos - (offset_central_dir+size_central_dir);
pziinit->add_position_when_writting_offset = byte_before_the_zipfile;
{
ZPOS64_T size_central_dir_to_read = size_central_dir;
size_t buf_size = SIZEDATA_INDATABLOCK;
void* buf_read = (void*)ALLOC(buf_size);
if (ZSEEK64(pziinit->z_filefunc, pziinit->filestream, offset_central_dir + byte_before_the_zipfile, ZLIB_FILEFUNC_SEEK_SET) != 0)
err=ZIP_ERRNO;
while ((size_central_dir_to_read>0) && (err==ZIP_OK))
{
ZPOS64_T read_this = SIZEDATA_INDATABLOCK;
if (read_this > size_central_dir_to_read)
read_this = size_central_dir_to_read;
if (ZREAD64(pziinit->z_filefunc, pziinit->filestream,buf_read,(uLong)read_this) != read_this)
err=ZIP_ERRNO;
if (err==ZIP_OK)
err = add_data_in_datablock(&pziinit->central_dir,buf_read, (uLong)read_this);
size_central_dir_to_read-=read_this;
}
TRYFREE(buf_read);
}
pziinit->begin_pos = byte_before_the_zipfile;
pziinit->number_entry = number_entry_CD;
if (ZSEEK64(pziinit->z_filefunc, pziinit->filestream, offset_central_dir+byte_before_the_zipfile,ZLIB_FILEFUNC_SEEK_SET) != 0)
err=ZIP_ERRNO;
return err;
}
#endif /* !NO_ADDFILEINEXISTINGZIP*/
/************************************************************/
extern zipFile ZEXPORT zipOpen3 (const void *pathname, int append, zipcharpc* globalcomment, zlib_filefunc64_32_def* pzlib_filefunc64_32_def)
{
zip64_internal ziinit;
zip64_internal* zi;
int err=ZIP_OK;
ziinit.z_filefunc.zseek32_file = NULL;
ziinit.z_filefunc.ztell32_file = NULL;
if (pzlib_filefunc64_32_def==NULL)
fill_fopen64_filefunc(&ziinit.z_filefunc.zfile_func64);
else
ziinit.z_filefunc = *pzlib_filefunc64_32_def;
ziinit.filestream = ZOPEN64(ziinit.z_filefunc,
pathname,
(append == APPEND_STATUS_CREATE) ?
(ZLIB_FILEFUNC_MODE_READ | ZLIB_FILEFUNC_MODE_WRITE | ZLIB_FILEFUNC_MODE_CREATE) :
(ZLIB_FILEFUNC_MODE_READ | ZLIB_FILEFUNC_MODE_WRITE | ZLIB_FILEFUNC_MODE_EXISTING));
if (ziinit.filestream == NULL)
return NULL;
if (append == APPEND_STATUS_CREATEAFTER)
ZSEEK64(ziinit.z_filefunc,ziinit.filestream,0,SEEK_END);
ziinit.begin_pos = ZTELL64(ziinit.z_filefunc,ziinit.filestream);
ziinit.in_opened_file_inzip = 0;
ziinit.ci.stream_initialised = 0;
ziinit.number_entry = 0;
ziinit.add_position_when_writting_offset = 0;
init_linkedlist(&(ziinit.central_dir));
zi = (zip64_internal*)ALLOC(sizeof(zip64_internal));
if (zi==NULL)
{
ZCLOSE64(ziinit.z_filefunc,ziinit.filestream);
return NULL;
}
/* now we add file in a zipfile */
# ifndef NO_ADDFILEINEXISTINGZIP
ziinit.globalcomment = NULL;
if (append == APPEND_STATUS_ADDINZIP)
{
// Read and Cache Central Directory Records
err = LoadCentralDirectoryRecord(&ziinit);
}
if (globalcomment)
{
*globalcomment = ziinit.globalcomment;
}
# endif /* !NO_ADDFILEINEXISTINGZIP*/
if (err != ZIP_OK)
{
# ifndef NO_ADDFILEINEXISTINGZIP
TRYFREE(ziinit.globalcomment);
# endif /* !NO_ADDFILEINEXISTINGZIP*/
TRYFREE(zi);
return NULL;
}
else
{
*zi = ziinit;
return (zipFile)zi;
}
}
extern zipFile ZEXPORT zipOpen2 (const char *pathname, int append, zipcharpc* globalcomment, zlib_filefunc_def* pzlib_filefunc32_def)
{
if (pzlib_filefunc32_def != NULL)
{
zlib_filefunc64_32_def zlib_filefunc64_32_def_fill;
fill_zlib_filefunc64_32_def_from_filefunc32(&zlib_filefunc64_32_def_fill,pzlib_filefunc32_def);
return zipOpen3(pathname, append, globalcomment, &zlib_filefunc64_32_def_fill);
}
else
return zipOpen3(pathname, append, globalcomment, NULL);
}
extern zipFile ZEXPORT zipOpen2_64 (const void *pathname, int append, zipcharpc* globalcomment, zlib_filefunc64_def* pzlib_filefunc_def)
{
if (pzlib_filefunc_def != NULL)
{
zlib_filefunc64_32_def zlib_filefunc64_32_def_fill;
zlib_filefunc64_32_def_fill.zfile_func64 = *pzlib_filefunc_def;
zlib_filefunc64_32_def_fill.ztell32_file = NULL;
zlib_filefunc64_32_def_fill.zseek32_file = NULL;
return zipOpen3(pathname, append, globalcomment, &zlib_filefunc64_32_def_fill);
}
else
return zipOpen3(pathname, append, globalcomment, NULL);
}
extern zipFile ZEXPORT zipOpen (const char* pathname, int append)
{
return zipOpen3((const void*)pathname,append,NULL,NULL);
}
extern zipFile ZEXPORT zipOpen64 (const void* pathname, int append)
{
return zipOpen3(pathname,append,NULL,NULL);
}
int Write_LocalFileHeader(zip64_internal* zi, const char* filename, uInt size_extrafield_local, const void* extrafield_local)
{
/* write the local header */
int err;
uInt size_filename = (uInt)strlen(filename);
uInt size_extrafield = size_extrafield_local;
err = zip64local_putValue(&zi->z_filefunc,zi->filestream,(uLong)LOCALHEADERMAGIC, 4);
if (err==ZIP_OK)
{
if(zi->ci.zip64)
err = zip64local_putValue(&zi->z_filefunc,zi->filestream,(uLong)45,2);/* version needed to extract */
else
err = zip64local_putValue(&zi->z_filefunc,zi->filestream,(uLong)20,2);/* version needed to extract */
}
if (err==ZIP_OK)
err = zip64local_putValue(&zi->z_filefunc,zi->filestream,(uLong)zi->ci.flag,2);
if (err==ZIP_OK)
err = zip64local_putValue(&zi->z_filefunc,zi->filestream,(uLong)zi->ci.method,2);
if (err==ZIP_OK)
err = zip64local_putValue(&zi->z_filefunc,zi->filestream,(uLong)zi->ci.dosDate,4);
// CRC / Compressed size / Uncompressed size will be filled in later and rewritten later
if (err==ZIP_OK)
err = zip64local_putValue(&zi->z_filefunc,zi->filestream,(uLong)0,4); /* crc 32, unknown */
if (err==ZIP_OK)
{
if(zi->ci.zip64)
err = zip64local_putValue(&zi->z_filefunc,zi->filestream,(uLong)0xFFFFFFFF,4); /* compressed size, unknown */
else
err = zip64local_putValue(&zi->z_filefunc,zi->filestream,(uLong)0,4); /* compressed size, unknown */
}
if (err==ZIP_OK)
{
if(zi->ci.zip64)
err = zip64local_putValue(&zi->z_filefunc,zi->filestream,(uLong)0xFFFFFFFF,4); /* uncompressed size, unknown */
else
err = zip64local_putValue(&zi->z_filefunc,zi->filestream,(uLong)0,4); /* uncompressed size, unknown */
}