/* 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 automatically 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 alignment */

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_writing_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_writing_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;

/* GODOT start */

if (pzlib_filefunc64_32_def==NULL) {

//fill_fopen64_filefunc(&ziinit.z_filefunc.zfile_func64);

} else

/* GODOT end */

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_writing_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