/* 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></stdio.h>

#include <stdlib.h></stdlib.h>

#include <string.h></string.h>

#include <time.h></time.h>

#include "zlib.h"

#include "zip.h"

#ifdef STDC

#  include <stddef.h></stddef.h>

#  include <string.h></string.h>

#  include <stdlib.h></stdlib.h>

#endif

#ifdef NO_ERRNO_H

    extern int errno;

#else

#   include <errno.h></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

            *(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

  {

    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

  {

    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

    (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;