1 /* unzip.c -- IO for uncompress .zip files using zlib

     2    Version 1.01e, February 12th, 2005

     3 

     4    Copyright (C) 1998-2005 Gilles Vollant

     5 

     6    Read unzip.h for more info

     7 

     8    Modified by Sergey A. Tachenov to integrate with Qt.

     9 */

    10 

    11 /* Decryption code comes from crypt.c by Info-ZIP but has been greatly reduced in terms of

    12 compatibility with older software. The following is from the original crypt.c. Code

    13 woven in by Terry Thorsen 1/2003.

    14 */

    15 /*

    16   Copyright (c) 1990-2000 Info-ZIP.  All rights reserved.

    17 

    18   See the accompanying file LICENSE, version 2000-Apr-09 or later

    19   (the contents of which are also included in zip.h) for terms of use.

    20   If, for some reason, all these files are missing, the Info-ZIP license

    21   also may be found at:  ftp://ftp.info-zip.org/pub/infozip/license.html

    22 */

    23 /*

    24   crypt.c (full version) by Info-ZIP.      Last revised:  [see crypt.h]

    25 

    26   The encryption/decryption parts of this source code (as opposed to the

    27   non-echoing password parts) were originally written in Europe.  The

    28   whole source package can be freely distributed, including from the USA.

    29   (Prior to January 2000, re-export from the US was a violation of US law.)

    30  */

    31 

    32 /*

    33   This encryption code is a direct transcription of the algorithm from

    34   Roger Schlafly, described by Phil Katz in the file appnote.txt.  This

    35   file (appnote.txt) is distributed with the PKZIP program (even in the

    36   version without encryption capabilities).

    37  */

    38 

    39 

    40 #include <stdio.h>

    41 #include <stdlib.h>

    42 #include <string.h>

    43 #include "zlib.h"

    44 #include "unzip.h"

    45 

    46 #ifdef STDC

    47 #  include <stddef.h>

    48 #  include <string.h>

    49 #  include <stdlib.h>

    50 #endif

    51 #ifdef NO_ERRNO_H

    52     extern int errno;

    53 #else

    54 #   include <errno.h>

    55 #endif

    56 

    57 

    58 #ifndef local

    59 #  define local static

    60 #endif

    61 /* compile with -Dlocal if your debugger can't find static symbols */

    62 

    63 

    64 #ifndef CASESENSITIVITYDEFAULT_NO

    65 #  if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES)

    66 #    define CASESENSITIVITYDEFAULT_NO

    67 #  endif

    68 #endif

    69 

    70 

    71 #ifndef UNZ_BUFSIZE

    72 #define UNZ_BUFSIZE (16384)

    73 #endif

    74 

    75 #ifndef UNZ_MAXFILENAMEINZIP

    76 #define UNZ_MAXFILENAMEINZIP (256)

    77 #endif

    78 

    79 #ifndef ALLOC

    80 # define ALLOC(size) (malloc(size))

    81 #endif

    82 #ifndef TRYFREE

    83 # define TRYFREE(p) {if (p) free(p);}

    84 #endif

    85 

    86 #define SIZECENTRALDIRITEM (0x2e)

    87 #define SIZEZIPLOCALHEADER (0x1e)

    88 

    89 

    90 

    91 

    92 const char unz_copyright[] =

    93    " unzip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll";

    94 

    95 /* unz_file_info_interntal contain internal info about a file in zipfile*/

    96 typedef struct unz_file_info_internal_s

    97 {

    98     uLong offset_curfile;/* relative offset of local header 4 bytes */

    99 } unz_file_info_internal;

   100 

   101 

   102 /* file_in_zip_read_info_s contain internal information about a file in zipfile,

   103     when reading and decompress it */

   104 typedef struct

   105 {

   106     char  *read_buffer;         /* internal buffer for compressed data */

   107     z_stream stream;            /* zLib stream structure for inflate */

   108 

   109     uLong pos_in_zipfile;       /* position in byte on the zipfile, for fseek*/

   110     uLong stream_initialised;   /* flag set if stream structure is initialised*/

   111 

   112     uLong offset_local_extrafield;/* offset of the local extra field */

   113     uInt  size_local_extrafield;/* size of the local extra field */

   114     uLong pos_local_extrafield;   /* position in the local extra field in read*/

   115 

   116     uLong crc32;                /* crc32 of all data uncompressed */

   117     uLong crc32_wait;           /* crc32 we must obtain after decompress all */

   118     uLong rest_read_compressed; /* number of byte to be decompressed */

   119     uLong rest_read_uncompressed;/*number of byte to be obtained after decomp*/

   120     zlib_filefunc_def z_filefunc;

   121     voidpf filestream;        /* io structore of the zipfile */

   122     uLong compression_method;   /* compression method (0==store) */

   123     uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/

   124     int   raw;

   125 } file_in_zip_read_info_s;

   126 

   127 

   128 /* unz_s contain internal information about the zipfile

   129 */

   130 typedef struct

   131 {

   132     zlib_filefunc_def z_filefunc;

   133     voidpf filestream;        /* io structore of the zipfile */

   134     unz_global_info gi;       /* public global information */

   135     uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/

   136     uLong num_file;             /* number of the current file in the zipfile*/

   137     uLong pos_in_central_dir;   /* pos of the current file in the central dir*/

   138     uLong current_file_ok;      /* flag about the usability of the current file*/

   139     uLong central_pos;          /* position of the beginning of the central dir*/

   140 

   141     uLong size_central_dir;     /* size of the central directory  */

   142     uLong offset_central_dir;   /* offset of start of central directory with

   143                                    respect to the starting disk number */

   144 

   145     unz_file_info cur_file_info; /* public info about the current file in zip*/

   146     unz_file_info_internal cur_file_info_internal; /* private info about it*/

   147     file_in_zip_read_info_s* pfile_in_zip_read; /* structure about the current

   148                                         file if we are decompressing it */

   149     int encrypted;

   150 #    ifndef NOUNCRYPT

   151     unsigned long keys[3];     /* keys defining the pseudo-random sequence */

   152     const unsigned long* pcrc_32_tab;

   153 #    endif

   154 } unz_s;

   155 

   156 

   157 #ifndef NOUNCRYPT

   158 #include "crypt.h"

   159 #endif

   160 

   161 /* ===========================================================================

   162      Read a byte from a gz_stream; update next_in and avail_in. Return EOF

   163    for end of file.

   164    IN assertion: the stream s has been sucessfully opened for reading.

   165 */

   166 

   167 

   168 local int unzlocal_getByte OF((

   169     const zlib_filefunc_def* pzlib_filefunc_def,

   170     voidpf filestream,

   171     int *pi));

   172 

   173 local int unzlocal_getByte(pzlib_filefunc_def,filestream,pi)

   174     const zlib_filefunc_def* pzlib_filefunc_def;

   175     voidpf filestream;

   176     int *pi;

   177 {

   178     unsigned char c;

   179     int err = (int)ZREAD(*pzlib_filefunc_def,filestream,&c,1);

   180     if (err==1)

   181     {

   182         *pi = (int)c;

   183         return UNZ_OK;

   184     }

   185     else

   186     {

   187         if (ZERROR(*pzlib_filefunc_def,filestream))

   188             return UNZ_ERRNO;

   189         else

   190             return UNZ_EOF;

   191     }

   192 }

   193 

   194 

   195 /* ===========================================================================

   196    Reads a long in LSB order from the given gz_stream. Sets

   197 */

   198 local int unzlocal_getShort OF((

   199     const zlib_filefunc_def* pzlib_filefunc_def,

   200     voidpf filestream,

   201     uLong *pX));

   202 

   203 local int unzlocal_getShort (pzlib_filefunc_def,filestream,pX)

   204     const zlib_filefunc_def* pzlib_filefunc_def;

   205     voidpf filestream;

   206     uLong *pX;

   207 {

   208     uLong x ;

   209     int i;

   210     int err;

   211 

   212     err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);

   213     x = (uLong)i;

   214 

   215     if (err==UNZ_OK)

   216         err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);

   217     x += ((uLong)i)<<8;

   218 

   219     if (err==UNZ_OK)

   220         *pX = x;

   221     else

   222         *pX = 0;

   223     return err;

   224 }

   225 

   226 local int unzlocal_getLong OF((

   227     const zlib_filefunc_def* pzlib_filefunc_def,

   228     voidpf filestream,

   229     uLong *pX));

   230 

   231 local int unzlocal_getLong (pzlib_filefunc_def,filestream,pX)

   232     const zlib_filefunc_def* pzlib_filefunc_def;

   233     voidpf filestream;

   234     uLong *pX;

   235 {

   236     uLong x ;

   237     int i;

   238     int err;

   239 

   240     err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);

   241     x = (uLong)i;

   242 

   243     if (err==UNZ_OK)

   244         err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);

   245     x += ((uLong)i)<<8;

   246 

   247     if (err==UNZ_OK)

   248         err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);

   249     x += ((uLong)i)<<16;

   250 

   251     if (err==UNZ_OK)

   252         err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);

   253     x += ((uLong)i)<<24;

   254 

   255     if (err==UNZ_OK)

   256         *pX = x;

   257     else

   258         *pX = 0;

   259     return err;

   260 }

   261 

   262 

   263 /* My own strcmpi / strcasecmp */

   264 local int strcmpcasenosensitive_internal (fileName1,fileName2)

   265     const char* fileName1;

   266     const char* fileName2;

   267 {

   268     for (;;)

   269     {

   270         char c1=*(fileName1++);

   271         char c2=*(fileName2++);

   272         if ((c1>='a') && (c1<='z'))

   273             c1 -= 0x20;

   274         if ((c2>='a') && (c2<='z'))

   275             c2 -= 0x20;

   276         if (c1=='\0')

   277             return ((c2=='\0') ? 0 : -1);

   278         if (c2=='\0')

   279             return 1;

   280         if (c1<c2)

   281             return -1;

   282         if (c1>c2)

   283             return 1;

   284     }

   285 }

   286 

   287 

   288 #ifdef  CASESENSITIVITYDEFAULT_NO

   289 #define CASESENSITIVITYDEFAULTVALUE 2

   290 #else

   291 #define CASESENSITIVITYDEFAULTVALUE 1

   292 #endif

   293 

   294 #ifndef STRCMPCASENOSENTIVEFUNCTION

   295 #define STRCMPCASENOSENTIVEFUNCTION strcmpcasenosensitive_internal

   296 #endif

   297 

   298 /*

   299    Compare two filename (fileName1,fileName2).

   300    If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp)

   301    If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi

   302                                                                 or strcasecmp)

   303    If iCaseSenisivity = 0, case sensitivity is defaut of your operating system

   304         (like 1 on Unix, 2 on Windows)

   305 

   306 */

   307 extern int ZEXPORT unzStringFileNameCompare (fileName1,fileName2,iCaseSensitivity)

   308     const char* fileName1;

   309     const char* fileName2;

   310     int iCaseSensitivity;

   311 {

   312     if (iCaseSensitivity==0)

   313         iCaseSensitivity=CASESENSITIVITYDEFAULTVALUE;

   314 

   315     if (iCaseSensitivity==1)

   316         return strcmp(fileName1,fileName2);

   317 

   318     return STRCMPCASENOSENTIVEFUNCTION(fileName1,fileName2);

   319 }

   320 

   321 #ifndef BUFREADCOMMENT

   322 #define BUFREADCOMMENT (0x400)

   323 #endif

   324 

   325 /*

   326   Locate the Central directory of a zipfile (at the end, just before

   327     the global comment)

   328 */

   329 local uLong unzlocal_SearchCentralDir OF((

   330     const zlib_filefunc_def* pzlib_filefunc_def,

   331     voidpf filestream));

   332 

   333 local uLong unzlocal_SearchCentralDir(pzlib_filefunc_def,filestream)

   334     const zlib_filefunc_def* pzlib_filefunc_def;

   335     voidpf filestream;

   336 {

   337     unsigned char* buf;

   338     uLong uSizeFile;

   339     uLong uBackRead;

   340     uLong uMaxBack=0xffff; /* maximum size of global comment */

   341     uLong uPosFound=0;

   342 

   343     if (ZSEEK(*pzlib_filefunc_def,filestream,0,ZLIB_FILEFUNC_SEEK_END) != 0)

   344         return 0;

   345 

   346 

   347     uSizeFile = ZTELL(*pzlib_filefunc_def,filestream);

   348 

   349     if (uMaxBack>uSizeFile)

   350         uMaxBack = uSizeFile;

   351 

   352     buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);

   353     if (buf==NULL)

   354         return 0;

   355 

   356     uBackRead = 4;

   357     while (uBackRead<uMaxBack)

   358     {

   359         uLong uReadSize,uReadPos ;

   360         int i;

   361         if (uBackRead+BUFREADCOMMENT>uMaxBack)

   362             uBackRead = uMaxBack;

   363         else

   364             uBackRead+=BUFREADCOMMENT;

   365         uReadPos = uSizeFile-uBackRead ;

   366 

   367         uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ?

   368                      (BUFREADCOMMENT+4) : (uSizeFile-uReadPos);

   369         if (ZSEEK(*pzlib_filefunc_def,filestream,uReadPos,ZLIB_FILEFUNC_SEEK_SET)!=0)

   370             break;

   371 

   372         if (ZREAD(*pzlib_filefunc_def,filestream,buf,uReadSize)!=uReadSize)

   373             break;

   374 

   375         for (i=(int)uReadSize-3; (i--)>0;)

   376             if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&

   377                 ((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06))

   378             {

   379                 uPosFound = uReadPos+i;

   380                 break;

   381             }

   382 

   383         if (uPosFound!=0)

   384             break;

   385     }

   386     TRYFREE(buf);

   387     return uPosFound;

   388 }

   389 

   390 /*

   391   Open a Zip file. path contain the full pathname (by example,

   392      on a Windows NT computer "c:\\test\\zlib114.zip" or on an Unix computer

   393      "zlib/zlib114.zip".

   394      If the zipfile cannot be opened (file doesn't exist or in not valid), the

   395        return value is NULL.

   396      Else, the return value is a unzFile Handle, usable with other function

   397        of this unzip package.

   398 */

   399 extern unzFile ZEXPORT unzOpen2 (file, pzlib_filefunc_def)

   400     voidpf file;

   401     zlib_filefunc_def* pzlib_filefunc_def;

   402 {

   403     unz_s us;

   404     unz_s *s;

   405     uLong central_pos,uL;

   406 

   407     uLong number_disk;          /* number of the current dist, used for

   408                                    spaning ZIP, unsupported, always 0*/

   409     uLong number_disk_with_CD;  /* number the the disk with central dir, used

   410                                    for spaning ZIP, unsupported, always 0*/

   411     uLong number_entry_CD;      /* total number of entries in

   412                                    the central dir

   413                                    (same than number_entry on nospan) */

   414 

   415     int err=UNZ_OK;

   416 

   417     if (unz_copyright[0]!=' ')

   418         return NULL;

   419 

   420     if (pzlib_filefunc_def==NULL)

   421         fill_qiodevice_filefunc(&us.z_filefunc);

   422     else

   423         us.z_filefunc = *pzlib_filefunc_def;

   424 

   425     us.filestream= (*(us.z_filefunc.zopen_file))(us.z_filefunc.opaque,

   426                                                  file,

   427                                                  ZLIB_FILEFUNC_MODE_READ |

   428                                                  ZLIB_FILEFUNC_MODE_EXISTING);

   429     if (us.filestream==NULL)

   430         return NULL;

   431 

   432     central_pos = unzlocal_SearchCentralDir(&us.z_filefunc,us.filestream);

   433     if (central_pos==0)

   434         err=UNZ_ERRNO;

   435 

   436     if (ZSEEK(us.z_filefunc, us.filestream,

   437                                       central_pos,ZLIB_FILEFUNC_SEEK_SET)!=0)

   438         err=UNZ_ERRNO;

   439 

   440     /* the signature, already checked */

   441     if (unzlocal_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)

   442         err=UNZ_ERRNO;

   443 

   444     /* number of this disk */

   445     if (unzlocal_getShort(&us.z_filefunc, us.filestream,&number_disk)!=UNZ_OK)

   446         err=UNZ_ERRNO;

   447 

   448     /* number of the disk with the start of the central directory */

   449     if (unzlocal_getShort(&us.z_filefunc, us.filestream,&number_disk_with_CD)!=UNZ_OK)

   450         err=UNZ_ERRNO;

   451 

   452     /* total number of entries in the central dir on this disk */

   453     if (unzlocal_getShort(&us.z_filefunc, us.filestream,&us.gi.number_entry)!=UNZ_OK)

   454         err=UNZ_ERRNO;

   455 

   456     /* total number of entries in the central dir */

   457     if (unzlocal_getShort(&us.z_filefunc, us.filestream,&number_entry_CD)!=UNZ_OK)

   458         err=UNZ_ERRNO;

   459 

   460     if ((number_entry_CD!=us.gi.number_entry) ||

   461         (number_disk_with_CD!=0) ||

   462         (number_disk!=0))

   463         err=UNZ_BADZIPFILE;

   464 

   465     /* size of the central directory */

   466     if (unzlocal_getLong(&us.z_filefunc, us.filestream,&us.size_central_dir)!=UNZ_OK)

   467         err=UNZ_ERRNO;

   468 

   469     /* offset of start of central directory with respect to the

   470           starting disk number */

   471     if (unzlocal_getLong(&us.z_filefunc, us.filestream,&us.offset_central_dir)!=UNZ_OK)

   472         err=UNZ_ERRNO;

   473 

   474     /* zipfile comment length */

   475     if (unzlocal_getShort(&us.z_filefunc, us.filestream,&us.gi.size_comment)!=UNZ_OK)

   476         err=UNZ_ERRNO;

   477 

   478     if ((central_pos<us.offset_central_dir+us.size_central_dir) &&

   479         (err==UNZ_OK))

   480         err=UNZ_BADZIPFILE;

   481 

   482     if (err!=UNZ_OK)

   483     {

   484         ZCLOSE(us.z_filefunc, us.filestream);

   485         return NULL;

   486     }

   487 

   488     us.byte_before_the_zipfile = central_pos -

   489                             (us.offset_central_dir+us.size_central_dir);

   490     us.central_pos = central_pos;

   491     us.pfile_in_zip_read = NULL;

   492     us.encrypted = 0;

   493 

   494 

   495     s=(unz_s*)ALLOC(sizeof(unz_s));

   496     *s=us;

   497     unzGoToFirstFile((unzFile)s);

   498     return (unzFile)s;

   499 }

   500 

   501 

   502 extern unzFile ZEXPORT unzOpen (file)

   503     voidpf file;

   504 {

   505     return unzOpen2(file, NULL);

   506 }

   507 

   508 /*

   509   Close a ZipFile opened with unzipOpen.

   510   If there is files inside the .Zip opened with unzipOpenCurrentFile (see later),

   511     these files MUST be closed with unzipCloseCurrentFile before call unzipClose.

   512   return UNZ_OK if there is no problem. */

   513 extern int ZEXPORT unzClose (file)

   514     unzFile file;

   515 {

   516     unz_s* s;

   517     if (file==NULL)

   518         return UNZ_PARAMERROR;

   519     s=(unz_s*)file;

   520 

   521     if (s->pfile_in_zip_read!=NULL)

   522         unzCloseCurrentFile(file);

   523 

   524     ZCLOSE(s->z_filefunc, s->filestream);

   525     TRYFREE(s);

   526     return UNZ_OK;

   527 }

   528 

   529 

   530 /*

   531   Write info about the ZipFile in the *pglobal_info structure.

   532   No preparation of the structure is needed

   533   return UNZ_OK if there is no problem. */

   534 extern int ZEXPORT unzGetGlobalInfo (file,pglobal_info)

   535     unzFile file;

   536     unz_global_info *pglobal_info;

   537 {

   538     unz_s* s;

   539     if (file==NULL)

   540         return UNZ_PARAMERROR;

   541     s=(unz_s*)file;

   542     *pglobal_info=s->gi;

   543     return UNZ_OK;

   544 }

   545 

   546 

   547 /*

   548    Translate date/time from Dos format to tm_unz (readable more easilty)

   549 */

   550 local void unzlocal_DosDateToTmuDate (ulDosDate, ptm)

   551     uLong ulDosDate;

   552     tm_unz* ptm;

   553 {

   554     uLong uDate;

   555     uDate = (uLong)(ulDosDate>>16);

   556     ptm->tm_mday = (uInt)(uDate&0x1f) ;

   557     ptm->tm_mon =  (uInt)((((uDate)&0x1E0)/0x20)-1) ;

   558     ptm->tm_year = (uInt)(((uDate&0x0FE00)/0x0200)+1980) ;

   559 

   560     ptm->tm_hour = (uInt) ((ulDosDate &0xF800)/0x800);

   561     ptm->tm_min =  (uInt) ((ulDosDate&0x7E0)/0x20) ;

   562     ptm->tm_sec =  (uInt) (2*(ulDosDate&0x1f)) ;

   563 }

   564 

   565 /*

   566   Get Info about the current file in the zipfile, with internal only info

   567 */

   568 local int unzlocal_GetCurrentFileInfoInternal OF((unzFile file,

   569                                                   unz_file_info *pfile_info,

   570                                                   unz_file_info_internal

   571                                                   *pfile_info_internal,

   572                                                   char *szFileName,

   573                                                   uLong fileNameBufferSize,

   574                                                   void *extraField,

   575                                                   uLong extraFieldBufferSize,

   576                                                   char *szComment,

   577                                                   uLong commentBufferSize));

   578 

   579 local int unzlocal_GetCurrentFileInfoInternal (file,

   580                                               pfile_info,

   581                                               pfile_info_internal,

   582                                               szFileName, fileNameBufferSize,

   583                                               extraField, extraFieldBufferSize,

   584                                               szComment,  commentBufferSize)

   585     unzFile file;

   586     unz_file_info *pfile_info;

   587     unz_file_info_internal *pfile_info_internal;

   588     char *szFileName;

   589     uLong fileNameBufferSize;

   590     void *extraField;

   591     uLong extraFieldBufferSize;

   592     char *szComment;

   593     uLong commentBufferSize;

   594 {

   595     unz_s* s;

   596     unz_file_info file_info;

   597     unz_file_info_internal file_info_internal;

   598     int err=UNZ_OK;

   599     uLong uMagic;

   600     uLong uSeek=0;

   601 

   602     if (file==NULL)

   603         return UNZ_PARAMERROR;

   604     s=(unz_s*)file;

   605     if (ZSEEK(s->z_filefunc, s->filestream,

   606               s->pos_in_central_dir+s->byte_before_the_zipfile,

   607               ZLIB_FILEFUNC_SEEK_SET)!=0)

   608         err=UNZ_ERRNO;

   609 

   610 

   611     /* we check the magic */

   612     if (err==UNZ_OK) {

   613         if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uMagic) != UNZ_OK)

   614             err=UNZ_ERRNO;

   615         else if (uMagic!=0x02014b50)

   616             err=UNZ_BADZIPFILE;

   617     }

   618 

   619     if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.version) != UNZ_OK)

   620         err=UNZ_ERRNO;

   621 

   622     if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.version_needed) != UNZ_OK)

   623         err=UNZ_ERRNO;

   624 

   625     if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.flag) != UNZ_OK)

   626         err=UNZ_ERRNO;

   627 

   628     if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.compression_method) != UNZ_OK)

   629         err=UNZ_ERRNO;

   630 

   631     if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.dosDate) != UNZ_OK)

   632         err=UNZ_ERRNO;

   633 

   634     unzlocal_DosDateToTmuDate(file_info.dosDate,&file_info.tmu_date);

   635 

   636     if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.crc) != UNZ_OK)

   637         err=UNZ_ERRNO;

   638 

   639     if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.compressed_size) != UNZ_OK)

   640         err=UNZ_ERRNO;

   641 

   642     if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.uncompressed_size) != UNZ_OK)

   643         err=UNZ_ERRNO;

   644 

   645     if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.size_filename) != UNZ_OK)

   646         err=UNZ_ERRNO;

   647 

   648     if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_extra) != UNZ_OK)

   649         err=UNZ_ERRNO;

   650 

   651     if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_comment) != UNZ_OK)

   652         err=UNZ_ERRNO;

   653 

   654     if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.disk_num_start) != UNZ_OK)

   655         err=UNZ_ERRNO;

   656 

   657     if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.internal_fa) != UNZ_OK)

   658         err=UNZ_ERRNO;

   659 

   660     if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.external_fa) != UNZ_OK)

   661         err=UNZ_ERRNO;

   662 

   663     if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info_internal.offset_curfile) != UNZ_OK)

   664         err=UNZ_ERRNO;

   665 

   666     uSeek+=file_info.size_filename;

   667     if ((err==UNZ_OK) && (szFileName!=NULL))

   668     {

   669         uLong uSizeRead ;

   670         if (file_info.size_filename<fileNameBufferSize)

   671         {

   672             *(szFileName+file_info.size_filename)='\0';

   673             uSizeRead = file_info.size_filename;

   674         }

   675         else

   676             uSizeRead = fileNameBufferSize;

   677 

   678         if ((file_info.size_filename>0) && (fileNameBufferSize>0))

   679             if (ZREAD(s->z_filefunc, s->filestream,szFileName,uSizeRead)!=uSizeRead)

   680                 err=UNZ_ERRNO;

   681         uSeek -= uSizeRead;

   682     }

   683 

   684 

   685     if ((err==UNZ_OK) && (extraField!=NULL))

   686     {

   687         uLong uSizeRead ;

   688         if (file_info.size_file_extra<extraFieldBufferSize)

   689             uSizeRead = file_info.size_file_extra;

   690         else

   691             uSizeRead = extraFieldBufferSize;

   692 

   693         if (uSeek!=0) {

   694             if (ZSEEK(s->z_filefunc, s->filestream,uSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)

   695                 uSeek=0;

   696             else

   697                 err=UNZ_ERRNO;

   698         }

   699         if ((file_info.size_file_extra>0) && (extraFieldBufferSize>0))

   700             if (ZREAD(s->z_filefunc, s->filestream,extraField,uSizeRead)!=uSizeRead)

   701                 err=UNZ_ERRNO;

   702         uSeek += file_info.size_file_extra - uSizeRead;

   703     }

   704     else

   705         uSeek+=file_info.size_file_extra;

   706 

   707 

   708     if ((err==UNZ_OK) && (szComment!=NULL))

   709     {

   710         uLong uSizeRead ;

   711         if (file_info.size_file_comment<commentBufferSize)

   712         {

   713             *(szComment+file_info.size_file_comment)='\0';

   714             uSizeRead = file_info.size_file_comment;

   715         }

   716         else

   717             uSizeRead = commentBufferSize;

   718 

   719         if (uSeek!=0) {

   720             if (ZSEEK(s->z_filefunc, s->filestream,uSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)

   721                 uSeek=0;

   722             else

   723                 err=UNZ_ERRNO;

   724         }

   725         if ((file_info.size_file_comment>0) && (commentBufferSize>0))

   726             if (ZREAD(s->z_filefunc, s->filestream,szComment,uSizeRead)!=uSizeRead)

   727                 err=UNZ_ERRNO;

   728         uSeek+=file_info.size_file_comment - uSizeRead;

   729     }

   730     else

   731         uSeek+=file_info.size_file_comment;

   732 

   733     if ((err==UNZ_OK) && (pfile_info!=NULL))

   734         *pfile_info=file_info;

   735 

   736     if ((err==UNZ_OK) && (pfile_info_internal!=NULL))

   737         *pfile_info_internal=file_info_internal;

   738 

   739     return err;

   740 }

   741 

   742 

   743 

   744 /*

   745   Write info about the ZipFile in the *pglobal_info structure.

   746   No preparation of the structure is needed

   747   return UNZ_OK if there is no problem.

   748 */

   749 extern int ZEXPORT unzGetCurrentFileInfo (file,

   750                                           pfile_info,

   751                                           szFileName, fileNameBufferSize,

   752                                           extraField, extraFieldBufferSize,

   753                                           szComment,  commentBufferSize)

   754     unzFile file;

   755     unz_file_info *pfile_info;

   756     char *szFileName;

   757     uLong fileNameBufferSize;

   758     void *extraField;

   759     uLong extraFieldBufferSize;

   760     char *szComment;

   761     uLong commentBufferSize;

   762 {

   763     return unzlocal_GetCurrentFileInfoInternal(file,pfile_info,NULL,

   764                                                 szFileName,fileNameBufferSize,

   765                                                 extraField,extraFieldBufferSize,

   766                                                 szComment,commentBufferSize);

   767 }

   768 

   769 /*

   770   Set the current file of the zipfile to the first file.

   771   return UNZ_OK if there is no problem

   772 */

   773 extern int ZEXPORT unzGoToFirstFile (file)

   774     unzFile file;

   775 {

   776     int err=UNZ_OK;

   777     unz_s* s;

   778     if (file==NULL)

   779         return UNZ_PARAMERROR;

   780     s=(unz_s*)file;

   781     s->pos_in_central_dir=s->offset_central_dir;

   782     s->num_file=0;

   783     err=unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,

   784                                              &s->cur_file_info_internal,

   785                                              NULL,0,NULL,0,NULL,0);

   786     s->current_file_ok = (err == UNZ_OK);

   787     return err;

   788 }

   789 

   790 /*

   791   Set the current file of the zipfile to the next file.

   792   return UNZ_OK if there is no problem

   793   return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.

   794 */

   795 extern int ZEXPORT unzGoToNextFile (file)

   796     unzFile file;

   797 {

   798     unz_s* s;

   799     int err;

   800 

   801     if (file==NULL)

   802         return UNZ_PARAMERROR;

   803     s=(unz_s*)file;

   804     if (!s->current_file_ok)

   805         return UNZ_END_OF_LIST_OF_FILE;

   806     if (s->gi.number_entry != 0xffff)    /* 2^16 files overflow hack */

   807       if (s->num_file+1==s->gi.number_entry)

   808         return UNZ_END_OF_LIST_OF_FILE;

   809 

   810     s->pos_in_central_dir += SIZECENTRALDIRITEM + s->cur_file_info.size_filename +

   811             s->cur_file_info.size_file_extra + s->cur_file_info.size_file_comment ;

   812     s->num_file++;

   813     err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,

   814                                                &s->cur_file_info_internal,

   815                                                NULL,0,NULL,0,NULL,0);

   816     s->current_file_ok = (err == UNZ_OK);

   817     return err;

   818 }

   819 

   820 

   821 /*

   822   Try locate the file szFileName in the zipfile.

   823   For the iCaseSensitivity signification, see unzipStringFileNameCompare

   824 

   825   return value :

   826   UNZ_OK if the file is found. It becomes the current file.

   827   UNZ_END_OF_LIST_OF_FILE if the file is not found

   828 */

   829 extern int ZEXPORT unzLocateFile (file, szFileName, iCaseSensitivity)

   830     unzFile file;

   831     const char *szFileName;

   832     int iCaseSensitivity;

   833 {

   834     unz_s* s;

   835     int err;

   836 

   837     /* We remember the 'current' position in the file so that we can jump

   838      * back there if we fail.

   839      */

   840     unz_file_info cur_file_infoSaved;

   841     unz_file_info_internal cur_file_info_internalSaved;

   842     uLong num_fileSaved;

   843     uLong pos_in_central_dirSaved;

   844 

   845 

   846     if (file==NULL)

   847         return UNZ_PARAMERROR;

   848 

   849     if (strlen(szFileName)>=UNZ_MAXFILENAMEINZIP)

   850         return UNZ_PARAMERROR;

   851 

   852     s=(unz_s*)file;

   853     if (!s->current_file_ok)

   854         return UNZ_END_OF_LIST_OF_FILE;

   855 

   856     /* Save the current state */

   857     num_fileSaved = s->num_file;

   858     pos_in_central_dirSaved = s->pos_in_central_dir;

   859     cur_file_infoSaved = s->cur_file_info;

   860     cur_file_info_internalSaved = s->cur_file_info_internal;

   861 

   862     err = unzGoToFirstFile(file);

   863 

   864     while (err == UNZ_OK)

   865     {

   866         char szCurrentFileName[UNZ_MAXFILENAMEINZIP+1];

   867         err = unzGetCurrentFileInfo(file,NULL,

   868                                     szCurrentFileName,sizeof(szCurrentFileName)-1,

   869                                     NULL,0,NULL,0);

   870         if (err == UNZ_OK)

   871         {

   872             if (unzStringFileNameCompare(szCurrentFileName,

   873                                             szFileName,iCaseSensitivity)==0)

   874                 return UNZ_OK;

   875             err = unzGoToNextFile(file);

   876         }

   877     }

   878 

   879     /* We failed, so restore the state of the 'current file' to where we

   880      * were.

   881      */

   882     s->num_file = num_fileSaved ;

   883     s->pos_in_central_dir = pos_in_central_dirSaved ;

   884     s->cur_file_info = cur_file_infoSaved;

   885     s->cur_file_info_internal = cur_file_info_internalSaved;

   886     return err;

   887 }

   888 

   889 

   890 /*

   891 ///////////////////////////////////////////

   892 // Contributed by Ryan Haksi (mailto://cryogen@infoserve.net)

   893 // I need random access

   894 //

   895 // Further optimization could be realized by adding an ability

   896 // to cache the directory in memory. The goal being a single

   897 // comprehensive file read to put the file I need in a memory.

   898 */

   899 

   900 /*

   901 typedef struct unz_file_pos_s

   902 {

   903     uLong pos_in_zip_directory;   // offset in file

   904     uLong num_of_file;            // # of file

   905 } unz_file_pos;

   906 */

   907 

   908 extern int ZEXPORT unzGetFilePos(file, file_pos)

   909     unzFile file;

   910     unz_file_pos* file_pos;

   911 {

   912     unz_s* s;

   913 

   914     if (file==NULL || file_pos==NULL)

   915         return UNZ_PARAMERROR;

   916     s=(unz_s*)file;

   917     if (!s->current_file_ok)

   918         return UNZ_END_OF_LIST_OF_FILE;

   919 

   920     file_pos->pos_in_zip_directory  = s->pos_in_central_dir;

   921     file_pos->num_of_file           = s->num_file;

   922 

   923     return UNZ_OK;

   924 }

   925 

   926 extern int ZEXPORT unzGoToFilePos(file, file_pos)

   927     unzFile file;

   928     unz_file_pos* file_pos;

   929 {

   930     unz_s* s;

   931     int err;

   932 

   933     if (file==NULL || file_pos==NULL)

   934         return UNZ_PARAMERROR;

   935     s=(unz_s*)file;

   936 

   937     /* jump to the right spot */

   938     s->pos_in_central_dir = file_pos->pos_in_zip_directory;

   939     s->num_file           = file_pos->num_of_file;

   940 

   941     /* set the current file */

   942     err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,

   943                                                &s->cur_file_info_internal,

   944                                                NULL,0,NULL,0,NULL,0);

   945     /* return results */

   946     s->current_file_ok = (err == UNZ_OK);

   947     return err;

   948 }

   949 

   950 /*

   951 // Unzip Helper Functions - should be here?

   952 ///////////////////////////////////////////

   953 */

   954 

   955 /*

   956   Read the local header of the current zipfile

   957   Check the coherency of the local header and info in the end of central

   958         directory about this file

   959   store in *piSizeVar the size of extra info in local header

   960         (filename and size of extra field data)

   961 */

   962 local int unzlocal_CheckCurrentFileCoherencyHeader (s,piSizeVar,

   963                                                     poffset_local_extrafield,

   964                                                     psize_local_extrafield)

   965     unz_s* s;

   966     uInt* piSizeVar;

   967     uLong *poffset_local_extrafield;

   968     uInt  *psize_local_extrafield;

   969 {

   970     uLong uMagic,uData,uFlags;

   971     uLong size_filename;

   972     uLong size_extra_field;

   973     int err=UNZ_OK;

   974 

   975     *piSizeVar = 0;

   976     *poffset_local_extrafield = 0;

   977     *psize_local_extrafield = 0;

   978 

   979     if (ZSEEK(s->z_filefunc, s->filestream,s->cur_file_info_internal.offset_curfile +

   980                                 s->byte_before_the_zipfile,ZLIB_FILEFUNC_SEEK_SET)!=0)

   981         return UNZ_ERRNO;

   982 

   983 

   984     if (err==UNZ_OK) {

   985         if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uMagic) != UNZ_OK)

   986             err=UNZ_ERRNO;

   987         else if (uMagic!=0x04034b50)

   988             err=UNZ_BADZIPFILE;

   989     }

   990 

   991     if (unzlocal_getShort(&s->z_filefunc, s->filestream,&uData) != UNZ_OK)

   992         err=UNZ_ERRNO;

   993 /*

   994     else if ((err==UNZ_OK) && (uData!=s->cur_file_info.wVersion))

   995         err=UNZ_BADZIPFILE;

   996 */

   997     if (unzlocal_getShort(&s->z_filefunc, s->filestream,&uFlags) != UNZ_OK)

   998         err=UNZ_ERRNO;

   999 

  1000     if (unzlocal_getShort(&s->z_filefunc, s->filestream,&uData) != UNZ_OK)

  1001         err=UNZ_ERRNO;

  1002     else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compression_method))

  1003         err=UNZ_BADZIPFILE;

  1004 

  1005     if ((err==UNZ_OK) && (s->cur_file_info.compression_method!=0) &&

  1006                          (s->cur_file_info.compression_method!=Z_DEFLATED))

  1007         err=UNZ_BADZIPFILE;

  1008 

  1009     if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* date/time */

  1010         err=UNZ_ERRNO;

  1011 

  1012     if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* crc */

  1013         err=UNZ_ERRNO;

  1014     else if ((err==UNZ_OK) && (uData!=s->cur_file_info.crc) &&

  1015                               ((uFlags & 8)==0))

  1016         err=UNZ_BADZIPFILE;

  1017 

  1018     if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* size compr */

  1019         err=UNZ_ERRNO;

  1020     else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compressed_size) &&

  1021                               ((uFlags & 8)==0))

  1022         err=UNZ_BADZIPFILE;

  1023 

  1024     if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* size uncompr */

  1025         err=UNZ_ERRNO;

  1026     else if ((err==UNZ_OK) && (uData!=s->cur_file_info.uncompressed_size) &&

  1027                               ((uFlags & 8)==0))

  1028         err=UNZ_BADZIPFILE;

  1029 

  1030 

  1031     if (unzlocal_getShort(&s->z_filefunc, s->filestream,&size_filename) != UNZ_OK)

  1032         err=UNZ_ERRNO;

  1033     else if ((err==UNZ_OK) && (size_filename!=s->cur_file_info.size_filename))

  1034         err=UNZ_BADZIPFILE;

  1035 

  1036     *piSizeVar += (uInt)size_filename;

  1037 

  1038     if (unzlocal_getShort(&s->z_filefunc, s->filestream,&size_extra_field) != UNZ_OK)

  1039         err=UNZ_ERRNO;

  1040     *poffset_local_extrafield= s->cur_file_info_internal.offset_curfile +

  1041                                     SIZEZIPLOCALHEADER + size_filename;

  1042     *psize_local_extrafield = (uInt)size_extra_field;

  1043 

  1044     *piSizeVar += (uInt)size_extra_field;

  1045 

  1046     return err;

  1047 }

  1048 

  1049 /*

  1050   Open for reading data the current file in the zipfile.

  1051   If there is no error and the file is opened, the return value is UNZ_OK.

  1052 */

  1053 extern int ZEXPORT unzOpenCurrentFile3 (file, method, level, raw, password)

  1054     unzFile file;

  1055     int* method;

  1056     int* level;

  1057     int raw;

  1058     const char* password;

  1059 {

  1060     int err=UNZ_OK;

  1061     uInt iSizeVar;

  1062     unz_s* s;

  1063     file_in_zip_read_info_s* pfile_in_zip_read_info;

  1064     uLong offset_local_extrafield;  /* offset of the local extra field */

  1065     uInt  size_local_extrafield;    /* size of the local extra field */

  1066 #    ifndef NOUNCRYPT

  1067     char source[12];

  1068 #    else

  1069     if (password != NULL)

  1070         return UNZ_PARAMERROR;

  1071 #    endif

  1072 

  1073     if (file==NULL)

  1074         return UNZ_PARAMERROR;

  1075     s=(unz_s*)file;

  1076     if (!s->current_file_ok)

  1077         return UNZ_PARAMERROR;

  1078 

  1079     if (s->pfile_in_zip_read != NULL)

  1080         unzCloseCurrentFile(file);

  1081 

  1082     if (unzlocal_CheckCurrentFileCoherencyHeader(s,&iSizeVar,

  1083                 &offset_local_extrafield,&size_local_extrafield)!=UNZ_OK)

  1084         return UNZ_BADZIPFILE;

  1085 

  1086     pfile_in_zip_read_info = (file_in_zip_read_info_s*)

  1087                                         ALLOC(sizeof(file_in_zip_read_info_s));

  1088     if (pfile_in_zip_read_info==NULL)

  1089         return UNZ_INTERNALERROR;

  1090 

  1091     pfile_in_zip_read_info->read_buffer=(char*)ALLOC(UNZ_BUFSIZE);

  1092     pfile_in_zip_read_info->offset_local_extrafield = offset_local_extrafield;

  1093     pfile_in_zip_read_info->size_local_extrafield = size_local_extrafield;

  1094     pfile_in_zip_read_info->pos_local_extrafield=0;

  1095     pfile_in_zip_read_info->raw=raw;

  1096 

  1097     if (pfile_in_zip_read_info->read_buffer==NULL)

  1098     {

  1099         TRYFREE(pfile_in_zip_read_info);

  1100         return UNZ_INTERNALERROR;

  1101     }

  1102 

  1103     pfile_in_zip_read_info->stream_initialised=0;

  1104 

  1105     if (method!=NULL)

  1106         *method = (int)s->cur_file_info.compression_method;

  1107 

  1108     if (level!=NULL)

  1109     {

  1110         *level = 6;

  1111         switch (s->cur_file_info.flag & 0x06)

  1112         {

  1113           case 6 : *level = 1; break;

  1114           case 4 : *level = 2; break;

  1115           case 2 : *level = 9; break;

  1116         }

  1117     }

  1118 

  1119     if ((s->cur_file_info.compression_method!=0) &&

  1120         (s->cur_file_info.compression_method!=Z_DEFLATED))

  1121         err=UNZ_BADZIPFILE;

  1122 

  1123     pfile_in_zip_read_info->crc32_wait=s->cur_file_info.crc;

  1124     pfile_in_zip_read_info->crc32=0;

  1125     pfile_in_zip_read_info->compression_method =

  1126             s->cur_file_info.compression_method;

  1127     pfile_in_zip_read_info->filestream=s->filestream;

  1128     pfile_in_zip_read_info->z_filefunc=s->z_filefunc;

  1129     pfile_in_zip_read_info->byte_before_the_zipfile=s->byte_before_the_zipfile;

  1130 

  1131     pfile_in_zip_read_info->stream.total_out = 0;

  1132 

  1133     if ((s->cur_file_info.compression_method==Z_DEFLATED) &&

  1134         (!raw))