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scummvm/common/unzip.cpp
Max Horn 14c5bbbccf Renamed Archive::openFile to createReadStreamForMember 
svn-id: r36021
2009-01-23 04:45:44 +00:00

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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*/
/* unzip.c -- IO on .zip files using zlib
Version 0.15 beta, Mar 19th, 1998,
Read unzip.h for more info
*/
/* unzip.h -- IO for uncompress .zip files using zlib
Version 0.15 beta, Mar 19th, 1998,
Copyright (C) 1998 Gilles Vollant
This unzip package allow extract file from .ZIP file, compatible with PKZip 2.04g
WinZip, InfoZip tools and compatible.
Encryption and multi volume ZipFile (span) are not supported.
Old compressions used by old PKZip 1.x are not supported
THIS IS AN ALPHA VERSION. AT THIS STAGE OF DEVELOPPEMENT, SOMES API OR STRUCTURE
CAN CHANGE IN FUTURE VERSION !!
I WAIT FEEDBACK at mail info@winimage.com
Visit also http://www.winimage.com/zLibDll/unzip.htm for evolution
Condition of use and distribution are the same than zlib :
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
/* for more info about .ZIP format, see
ftp://ftp.cdrom.com/pub/infozip/doc/appnote-970311-iz.zip
PkWare has also a specification at :
ftp://ftp.pkware.com/probdesc.zip */
#include "common/scummsys.h"
#ifdef USE_ZLIB
#ifdef __SYMBIAN32__
#include <zlib\zlib.h>
#else
#include <zlib.h>
#endif
#include "common/fs.h"
#include "common/unzip.h"
#include "common/file.h"
#if defined(STRICTUNZIP) || defined(STRICTZIPUNZIP)
/* like the STRICT of WIN32, we define a pointer that cannot be converted
from (void*) without cast */
typedef struct TagunzFile__ { int unused; } unzFile__;
typedef unzFile__ *unzFile;
#else
typedef voidp unzFile;
#endif
#define UNZ_OK (0)
#define UNZ_END_OF_LIST_OF_FILE (-100)
#define UNZ_ERRNO (Z_ERRNO)
#define UNZ_EOF (0)
#define UNZ_PARAMERROR (-102)
#define UNZ_BADZIPFILE (-103)
#define UNZ_INTERNALERROR (-104)
#define UNZ_CRCERROR (-105)
/* tm_unz contain date/time info */
typedef struct {
uInt tm_sec; /* seconds after the minute - [0,59] */
uInt tm_min; /* minutes after the hour - [0,59] */
uInt tm_hour; /* hours since midnight - [0,23] */
uInt tm_mday; /* day of the month - [1,31] */
uInt tm_mon; /* months since January - [0,11] */
uInt tm_year; /* years - [1980..2044] */
} tm_unz;
/* unz_global_info structure contain global data about the ZIPfile
These data comes from the end of central dir */
typedef struct {
uLong number_entry; /* total number of entries in
the central dir on this disk */
uLong size_comment; /* size of the global comment of the zipfile */
} unz_global_info;
/* unz_file_info contain information about a file in the zipfile */
typedef struct {
uLong version; /* version made by 2 bytes */
uLong version_needed; /* version needed to extract 2 bytes */
uLong flag; /* general purpose bit flag 2 bytes */
uLong compression_method; /* compression method 2 bytes */
uLong dosDate; /* last mod file date in Dos fmt 4 bytes */
uLong crc; /* crc-32 4 bytes */
uLong compressed_size; /* compressed size 4 bytes */
uLong uncompressed_size; /* uncompressed size 4 bytes */
uLong size_filename; /* filename length 2 bytes */
uLong size_file_extra; /* extra field length 2 bytes */
uLong size_file_comment; /* file comment length 2 bytes */
uLong disk_num_start; /* disk number start 2 bytes */
uLong internal_fa; /* internal file attributes 2 bytes */
uLong external_fa; /* external file attributes 4 bytes */
tm_unz tmu_date;
} unz_file_info;
int unzStringFileNameCompare(const char* fileName1,
const char* fileName2,
int iCaseSensitivity);
/*
Compare two filename (fileName1,fileName2).
If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp)
If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi
or strcasecmp)
If iCaseSenisivity = 0, case sensitivity is defaut of your operating system
(like 1 on Unix, 2 on Windows)
*/
/*
Open a Zip file. path contain the full pathname (by example,
on a Windows NT computer "c:\\zlib\\zlib111.zip" or on an Unix computer
"zlib/zlib111.zip".
If the zipfile cannot be opened (file don't exist or in not valid), the
return value is NULL.
Else, the return value is a unzFile Handle, usable with other function
of this unzip package.
*/
int unzClose(unzFile file);
/*
Close a ZipFile opened with unzipOpen.
If there is files inside the .Zip opened with unzOpenCurrentFile (see later),
these files MUST be closed with unzipCloseCurrentFile before call unzipClose.
return UNZ_OK if there is no problem. */
int unzGetGlobalInfo(unzFile file,
unz_global_info *pglobal_info);
/*
Write info about the ZipFile in the *pglobal_info structure.
No preparation of the structure is needed
return UNZ_OK if there is no problem. */
int unzGetGlobalComment(unzFile file, char *szComment, uLong uSizeBuf);
/*
Get the global comment string of the ZipFile, in the szComment buffer.
uSizeBuf is the size of the szComment buffer.
return the number of byte copied or an error code <0
*/
/***************************************************************************/
/* Unzip package allow you browse the directory of the zipfile */
int unzGoToFirstFile(unzFile file);
/*
Set the current file of the zipfile to the first file.
return UNZ_OK if there is no problem
*/
int unzGoToNextFile(unzFile file);
/*
Set the current file of the zipfile to the next file.
return UNZ_OK if there is no problem
return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.
*/
int unzLocateFile(unzFile file, const char *szFileName, int iCaseSensitivity);
/*
Try locate the file szFileName in the zipfile.
For the iCaseSensitivity signification, see unzStringFileNameCompare
return value :
UNZ_OK if the file is found. It becomes the current file.
UNZ_END_OF_LIST_OF_FILE if the file is not found
*/
int unzGetCurrentFileInfo(unzFile file,
unz_file_info *pfile_info,
char *szFileName,
uLong fileNameBufferSize,
void *extraField,
uLong extraFieldBufferSize,
char *szComment,
uLong commentBufferSize);
/*
Get Info about the current file
if pfile_info!=NULL, the *pfile_info structure will contain somes info about
the current file
if szFileName!=NULL, the filemane string will be copied in szFileName
(fileNameBufferSize is the size of the buffer)
if extraField!=NULL, the extra field information will be copied in extraField
(extraFieldBufferSize is the size of the buffer).
This is the Central-header version of the extra field
if szComment!=NULL, the comment string of the file will be copied in szComment
(commentBufferSize is the size of the buffer)
*/
/***************************************************************************/
/* for reading the content of the current zipfile, you can open it, read data
from it, and close it (you can close it before reading all the file)
*/
int unzOpenCurrentFile(unzFile file);
/*
Open for reading data the current file in the zipfile.
If there is no error, the return value is UNZ_OK.
*/
int unzCloseCurrentFile(unzFile file);
/*
Close the file in zip opened with unzOpenCurrentFile
Return UNZ_CRCERROR if all the file was read but the CRC is not good
*/
int unzReadCurrentFile(unzFile file, voidp buf, unsigned len);
/*
Read bytes from the current file (opened by unzOpenCurrentFile)
buf contain buffer where data must be copied
len the size of buf.
return the number of byte copied if somes bytes are copied
return 0 if the end of file was reached
return <0 with error code if there is an error
(UNZ_ERRNO for IO error, or zLib error for uncompress error)
*/
z_off_t unztell(unzFile file);
/*
Give the current position in uncompressed data
*/
int unzeof(unzFile file);
/*
return 1 if the end of file was reached, 0 elsewhere
*/
int unzGetLocalExtrafield(unzFile file, voidp buf, unsigned len);
/*
Read extra field from the current file (opened by unzOpenCurrentFile)
This is the local-header version of the extra field (sometimes, there is
more info in the local-header version than in the central-header)
if buf==NULL, it return the size of the local extra field
if buf!=NULL, len is the size of the buffer, the extra header is copied in
buf.
the return value is the number of bytes copied in buf, or (if <0)
the error code
*/
#if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES) && \
!defined(CASESENSITIVITYDEFAULT_NO)
#define CASESENSITIVITYDEFAULT_NO
#endif
#ifndef UNZ_BUFSIZE
#define UNZ_BUFSIZE (16384)
#endif
#ifndef UNZ_MAXFILENAMEINZIP
#define UNZ_MAXFILENAMEINZIP (256)
#endif
#define SIZECENTRALDIRITEM (0x2e)
#define SIZEZIPLOCALHEADER (0x1e)
const char unz_copyright[] =
" unzip 0.15 Copyright 1998 Gilles Vollant ";
/* unz_file_info_interntal contain internal info about a file in zipfile*/
typedef struct {
uLong offset_curfile;/* relative offset of local header 4 bytes */
} unz_file_info_internal;
/* file_in_zip_read_info_s contain internal information about a file in zipfile,
when reading and decompress it */
typedef struct {
char *read_buffer; /* internal buffer for compressed data */
z_stream stream; /* zLib stream structure for inflate */
uLong pos_in_zipfile; /* position in byte on the zipfile, for fseek*/
uLong stream_initialised; /* flag set if stream structure is initialised*/
uLong offset_local_extrafield;/* offset of the local extra field */
uInt size_local_extrafield;/* size of the local extra field */
uLong pos_local_extrafield; /* position in the local extra field in read*/
uLong crc32_data; /* crc32 of all data uncompressed */
uLong crc32_wait; /* crc32 we must obtain after decompress all */
uLong rest_read_compressed; /* number of byte to be decompressed */
uLong rest_read_uncompressed;/*number of byte to be obtained after decomp*/
Common::SeekableReadStream *_stream; /* io structore of the zipfile */
uLong compression_method; /* compression method (0==store) */
uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
} file_in_zip_read_info_s;
/* unz_s contain internal information about the zipfile
*/
typedef struct {
Common::SeekableReadStream *_stream; /* io structore of the zipfile */
unz_global_info gi; /* public global information */
uLong byte_before_the_zipfile; /* byte before the zipfile, (>0 for sfx)*/
uLong num_file; /* number of the current file in the zipfile*/
uLong pos_in_central_dir; /* pos of the current file in the central dir*/
uLong current_file_ok; /* flag about the usability of the current file*/
uLong central_pos; /* position of the beginning of the central dir*/
uLong size_central_dir; /* size of the central directory */
uLong offset_central_dir; /* offset of start of central directory with
respect to the starting disk number */
unz_file_info cur_file_info; /* public info about the current file in zip*/
unz_file_info_internal cur_file_info_internal; /* private info about it*/
file_in_zip_read_info_s* pfile_in_zip_read; /* structure about the current
file if we are decompressing it */
} unz_s;
/* ===========================================================================
Read a byte from a gz_stream; update next_in and avail_in. Return EOF
for end of file.
IN assertion: the stream s has been sucessfully opened for reading.
*/
/*static int unzlocal_getByte(Common::SeekableReadStream &fin, int *pi) {
unsigned char c = fin.readByte();
*pi = (int)c;
return UNZ_OK;
} else {
if (fin.ioFailed())
return UNZ_ERRNO;
else
return UNZ_EOF;
}
}*/
/* ===========================================================================
Reads a long in LSB order from the given gz_stream. Sets
*/
static int unzlocal_getShort(Common::SeekableReadStream *fin, uLong *pX) {
*pX = fin->readUint16LE();
return fin->ioFailed() ? UNZ_ERRNO : UNZ_OK;
}
static int unzlocal_getLong(Common::SeekableReadStream *fin, uLong *pX) {
*pX = fin->readUint32LE();
return fin->ioFailed() ? UNZ_ERRNO : UNZ_OK;
}
#ifdef CASESENSITIVITYDEFAULT_NO
#define CASESENSITIVITYDEFAULTVALUE 2
#else
#define CASESENSITIVITYDEFAULTVALUE 1
#endif
/*
Compare two filename (fileName1,fileName2).
If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp)
If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi
or strcasecmp)
If iCaseSenisivity = 0, case sensitivity is defaut of your operating system
(like 1 on Unix, 2 on Windows)
*/
int unzStringFileNameCompare(const char* fileName1, const char* fileName2, int iCaseSensitivity) {
if (iCaseSensitivity==0)
iCaseSensitivity=CASESENSITIVITYDEFAULTVALUE;
if (iCaseSensitivity==1)
return strcmp(fileName1,fileName2);
return scumm_stricmp(fileName1,fileName2);
}
#define BUFREADCOMMENT (0x400)
/*
Locate the Central directory of a zipfile (at the end, just before
the global comment)
*/
static uLong unzlocal_SearchCentralDir(Common::SeekableReadStream &fin) {
unsigned char* buf;
uLong uSizeFile;
uLong uBackRead;
uLong uMaxBack=0xffff; /* maximum size of global comment */
uLong uPosFound=0;
uSizeFile = fin.size();
if (fin.ioFailed())
return 0;
if (uMaxBack>uSizeFile)
uMaxBack = uSizeFile;
buf = (unsigned char*)malloc(BUFREADCOMMENT+4);
if (buf==NULL)
return 0;
uBackRead = 4;
while (uBackRead<uMaxBack) {
uLong uReadSize,uReadPos ;
int i;
if (uBackRead+BUFREADCOMMENT>uMaxBack)
uBackRead = uMaxBack;
else
uBackRead+=BUFREADCOMMENT;
uReadPos = uSizeFile-uBackRead ;
uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ?
(BUFREADCOMMENT+4) : (uSizeFile-uReadPos);
fin.seek(uReadPos, SEEK_SET);
if (fin.ioFailed())
break;
if (fin.read(buf,(uInt)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;
}
free(buf);
return uPosFound;
}
/*
Open a Zip file. path contain the full pathname (by example,
on a Windows NT computer "c:\\test\\zlib109.zip" or on an Unix computer
"zlib/zlib109.zip".
If the zipfile cannot be opened (file don't exist or in not valid), the
return value is NULL.
Else, the return value is a unzFile Handle, usable with other function
of this unzip package.
*/
unzFile unzOpen(Common::SeekableReadStream *stream) {
if (!stream)
return NULL;
unz_s *us = new unz_s;
uLong central_pos,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*/
uLong number_entry_CD; /* total number of entries in
the central dir
(same than number_entry on nospan) */
int err=UNZ_OK;
us->_stream = stream;
central_pos = unzlocal_SearchCentralDir(*us->_stream);
if (central_pos==0)
err=UNZ_ERRNO;
us->_stream->seek(central_pos, SEEK_SET);
if (us->_stream->ioFailed())
err=UNZ_ERRNO;
/* the signature, already checked */
if (unzlocal_getLong(us->_stream,&uL)!=UNZ_OK)
err=UNZ_ERRNO;
/* number of this disk */
if (unzlocal_getShort(us->_stream,&number_disk)!=UNZ_OK)
err=UNZ_ERRNO;
/* number of the disk with the start of the central directory */
if (unzlocal_getShort(us->_stream,&number_disk_with_CD)!=UNZ_OK)
err=UNZ_ERRNO;
/* total number of entries in the central dir on this disk */
if (unzlocal_getShort(us->_stream,&us->gi.number_entry)!=UNZ_OK)
err=UNZ_ERRNO;
/* total number of entries in the central dir */
if (unzlocal_getShort(us->_stream,&number_entry_CD)!=UNZ_OK)
err=UNZ_ERRNO;
if ((number_entry_CD!=us->gi.number_entry) ||
(number_disk_with_CD!=0) ||
(number_disk!=0))
err=UNZ_BADZIPFILE;
/* size of the central directory */
if (unzlocal_getLong(us->_stream,&us->size_central_dir)!=UNZ_OK)
err=UNZ_ERRNO;
/* offset of start of central directory with respect to the
starting disk number */
if (unzlocal_getLong(us->_stream,&us->offset_central_dir)!=UNZ_OK)
err=UNZ_ERRNO;
/* zipfile comment length */
if (unzlocal_getShort(us->_stream,&us->gi.size_comment)!=UNZ_OK)
err=UNZ_ERRNO;
if ((central_pos<us->offset_central_dir+us->size_central_dir) && (err==UNZ_OK))
err=UNZ_BADZIPFILE;
if (err!=UNZ_OK) {
delete us->_stream;
delete us;
return NULL;
}
us->byte_before_the_zipfile = central_pos -
(us->offset_central_dir+us->size_central_dir);
us->central_pos = central_pos;
us->pfile_in_zip_read = NULL;
unzGoToFirstFile((unzFile)us);
return (unzFile)us;
}
/*
Close a ZipFile opened with unzipOpen.
If there is files inside the .Zip opened with unzipOpenCurrentFile (see later),
these files MUST be closed with unzipCloseCurrentFile before call unzipClose.
return UNZ_OK if there is no problem. */
int unzClose(unzFile file) {
unz_s* s;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz_s*)file;
if (s->pfile_in_zip_read!=NULL)
unzCloseCurrentFile(file);
delete s->_stream;
delete s;
return UNZ_OK;
}
/*
Write info about the ZipFile in the *pglobal_info structure.
No preparation of the structure is needed
return UNZ_OK if there is no problem. */
int unzGetGlobalInfo (unzFile file, unz_global_info *pglobal_info) {
unz_s* s;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz_s*)file;
*pglobal_info=s->gi;
return UNZ_OK;
}
/*
Translate date/time from Dos format to tm_unz (readable more easilty)
*/
static void unzlocal_DosDateToTmuDate (uLong ulDosDate, tm_unz* ptm) {
uLong uDate;
uDate = (uLong)(ulDosDate>>16);
ptm->tm_mday = (uInt)(uDate&0x1f) ;
ptm->tm_mon = (uInt)((((uDate)&0x1E0)/0x20)-1) ;
ptm->tm_year = (uInt)(((uDate&0x0FE00)/0x0200)+1980) ;
ptm->tm_hour = (uInt) ((ulDosDate &0xF800)/0x800);
ptm->tm_min = (uInt) ((ulDosDate&0x7E0)/0x20) ;
ptm->tm_sec = (uInt) (2*(ulDosDate&0x1f)) ;
}
/*
Get Info about the current file in the zipfile, with internal only info
*/
static int unzlocal_GetCurrentFileInfoInternal(unzFile file,
unz_file_info *pfile_info,
unz_file_info_internal
*pfile_info_internal,
char *szFileName,
uLong fileNameBufferSize,
void *extraField,
uLong extraFieldBufferSize,
char *szComment,
uLong commentBufferSize);
static int unzlocal_GetCurrentFileInfoInternal(unzFile file,
unz_file_info *pfile_info,
unz_file_info_internal *pfile_info_internal,
char *szFileName, uLong fileNameBufferSize,
void *extraField, uLong extraFieldBufferSize,
char *szComment, uLong commentBufferSize)
{
unz_s* s;
unz_file_info file_info;
unz_file_info_internal file_info_internal;
int err=UNZ_OK;
uLong uMagic;
long lSeek=0;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz_s*)file;
s->_stream->seek(s->pos_in_central_dir+s->byte_before_the_zipfile, SEEK_SET);
if (s->_stream->ioFailed())
err=UNZ_ERRNO;
/* we check the magic */
if (err==UNZ_OK) {
if (unzlocal_getLong(s->_stream,&uMagic) != UNZ_OK)
err=UNZ_ERRNO;
else if (uMagic!=0x02014b50)
err=UNZ_BADZIPFILE;
}
if (unzlocal_getShort(s->_stream,&file_info.version) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(s->_stream,&file_info.version_needed) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(s->_stream,&file_info.flag) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(s->_stream,&file_info.compression_method) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getLong(s->_stream,&file_info.dosDate) != UNZ_OK)
err=UNZ_ERRNO;
unzlocal_DosDateToTmuDate(file_info.dosDate,&file_info.tmu_date);
if (unzlocal_getLong(s->_stream,&file_info.crc) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getLong(s->_stream,&file_info.compressed_size) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getLong(s->_stream,&file_info.uncompressed_size) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(s->_stream,&file_info.size_filename) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(s->_stream,&file_info.size_file_extra) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(s->_stream,&file_info.size_file_comment) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(s->_stream,&file_info.disk_num_start) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(s->_stream,&file_info.internal_fa) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getLong(s->_stream,&file_info.external_fa) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getLong(s->_stream,&file_info_internal.offset_curfile) != UNZ_OK)
err=UNZ_ERRNO;
lSeek+=file_info.size_filename;
if ((err==UNZ_OK) && (szFileName!=NULL)) {
uLong uSizeRead ;
if (file_info.size_filename<fileNameBufferSize) {
*(szFileName+file_info.size_filename)='\0';
uSizeRead = file_info.size_filename;
} else
uSizeRead = fileNameBufferSize;
if ((file_info.size_filename>0) && (fileNameBufferSize>0))
if (s->_stream->read(szFileName,(uInt)uSizeRead)!=uSizeRead)
err=UNZ_ERRNO;
lSeek -= uSizeRead;
}
if ((err==UNZ_OK) && (extraField!=NULL)) {
uLong uSizeRead ;
if (file_info.size_file_extra<extraFieldBufferSize)
uSizeRead = file_info.size_file_extra;
else
uSizeRead = extraFieldBufferSize;
if (lSeek!=0) {
s->_stream->seek(lSeek, SEEK_CUR);
if (s->_stream->ioFailed())
lSeek=0;
else
err=UNZ_ERRNO;
}
if ((file_info.size_file_extra>0) && (extraFieldBufferSize>0))
if (s->_stream->read(extraField,(uInt)uSizeRead)!=uSizeRead)
err=UNZ_ERRNO;
lSeek += file_info.size_file_extra - uSizeRead;
}
else
lSeek+=file_info.size_file_extra;
if ((err==UNZ_OK) && (szComment!=NULL)) {
uLong uSizeRead ;
if (file_info.size_file_comment<commentBufferSize) {
*(szComment+file_info.size_file_comment)='\0';
uSizeRead = file_info.size_file_comment;
} else
uSizeRead = commentBufferSize;
if (lSeek!=0) {
s->_stream->seek(lSeek, SEEK_CUR);
if (s->_stream->ioFailed())
lSeek=0;
else
err=UNZ_ERRNO;
}
if ((file_info.size_file_comment>0) && (commentBufferSize>0))
if (s->_stream->read(szComment,(uInt)uSizeRead)!=uSizeRead)
err=UNZ_ERRNO;
lSeek+=file_info.size_file_comment - uSizeRead;
} else
lSeek+=file_info.size_file_comment;
if ((err==UNZ_OK) && (pfile_info!=NULL))
*pfile_info=file_info;
if ((err==UNZ_OK) && (pfile_info_internal!=NULL))
*pfile_info_internal=file_info_internal;
return err;
}
/*
Write info about the ZipFile in the *pglobal_info structure.
No preparation of the structure is needed
return UNZ_OK if there is no problem.
*/
int unzGetCurrentFileInfo(unzFile file,
unz_file_info *pfile_info,
char *szFileName, uLong fileNameBufferSize,
void *extraField, uLong extraFieldBufferSize,
char *szComment, uLong commentBufferSize)
{
return unzlocal_GetCurrentFileInfoInternal(file,pfile_info,NULL,
szFileName,fileNameBufferSize,
extraField,extraFieldBufferSize,
szComment,commentBufferSize);
}
/*
Set the current file of the zipfile to the first file.
return UNZ_OK if there is no problem
*/
int unzGoToFirstFile(unzFile file) {
int err=UNZ_OK;
unz_s* s;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz_s*)file;
s->pos_in_central_dir=s->offset_central_dir;
s->num_file=0;
err=unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,
&s->cur_file_info_internal,
NULL,0,NULL,0,NULL,0);
s->current_file_ok = (err == UNZ_OK);
return err;
}
/*
Set the current file of the zipfile to the next file.
return UNZ_OK if there is no problem
return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.
*/
int unzGoToNextFile(unzFile file) {
unz_s* s;
int err;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz_s*)file;
if (!s->current_file_ok)
return UNZ_END_OF_LIST_OF_FILE;
if (s->num_file+1==s->gi.number_entry)
return UNZ_END_OF_LIST_OF_FILE;
s->pos_in_central_dir += SIZECENTRALDIRITEM + s->cur_file_info.size_filename +
s->cur_file_info.size_file_extra + s->cur_file_info.size_file_comment ;
s->num_file++;
err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,
&s->cur_file_info_internal,
NULL,0,NULL,0,NULL,0);
s->current_file_ok = (err == UNZ_OK);
return err;
}
/*
Try locate the file szFileName in the zipfile.
For the iCaseSensitivity signification, see unzipStringFileNameCompare
return value :
UNZ_OK if the file is found. It becomes the current file.
UNZ_END_OF_LIST_OF_FILE if the file is not found
*/
int unzLocateFile(unzFile file, const char *szFileName, int iCaseSensitivity) {
unz_s* s;
int err;
uLong num_fileSaved;
uLong pos_in_central_dirSaved;
if (file==NULL)
return UNZ_PARAMERROR;
if (strlen(szFileName)>=UNZ_MAXFILENAMEINZIP)
return UNZ_PARAMERROR;
s=(unz_s*)file;
if (!s->current_file_ok)
return UNZ_END_OF_LIST_OF_FILE;
num_fileSaved = s->num_file;
pos_in_central_dirSaved = s->pos_in_central_dir;
err = unzGoToFirstFile(file);
while (err == UNZ_OK) {
char szCurrentFileName[UNZ_MAXFILENAMEINZIP+1];
unzGetCurrentFileInfo(file,NULL,
szCurrentFileName,sizeof(szCurrentFileName)-1,
NULL,0,NULL,0);
if (unzStringFileNameCompare(szCurrentFileName,
szFileName,iCaseSensitivity)==0)
return UNZ_OK;
err = unzGoToNextFile(file);
}
s->num_file = num_fileSaved ;
s->pos_in_central_dir = pos_in_central_dirSaved ;
return err;
}
/*
Read the local header of the current zipfile
Check the coherency of the local header and info in the end of central
directory about this file
store in *piSizeVar the size of extra info in local header
(filename and size of extra field data)
*/
static int unzlocal_CheckCurrentFileCoherencyHeader(unz_s* s, uInt* piSizeVar,
uLong *poffset_local_extrafield,
uInt *psize_local_extrafield) {
uLong uMagic,uData,uFlags;
uLong size_filename;
uLong size_extra_field;
int err=UNZ_OK;
*piSizeVar = 0;
*poffset_local_extrafield = 0;
*psize_local_extrafield = 0;
s->_stream->seek(s->cur_file_info_internal.offset_curfile +
s->byte_before_the_zipfile, SEEK_SET);
if (s->_stream->ioFailed())
return UNZ_ERRNO;
if (err==UNZ_OK) {
if (unzlocal_getLong(s->_stream,&uMagic) != UNZ_OK)
err=UNZ_ERRNO;
else if (uMagic!=0x04034b50)
err=UNZ_BADZIPFILE;
}
if (unzlocal_getShort(s->_stream,&uData) != UNZ_OK)
err=UNZ_ERRNO;
/*
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.wVersion))
err=UNZ_BADZIPFILE;
*/
if (unzlocal_getShort(s->_stream,&uFlags) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(s->_stream,&uData) != UNZ_OK)
err=UNZ_ERRNO;
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compression_method))
err=UNZ_BADZIPFILE;
if ((err==UNZ_OK) && (s->cur_file_info.compression_method!=0) &&
(s->cur_file_info.compression_method!=Z_DEFLATED))
err=UNZ_BADZIPFILE;
if (unzlocal_getLong(s->_stream,&uData) != UNZ_OK) /* date/time */
err=UNZ_ERRNO;
if (unzlocal_getLong(s->_stream,&uData) != UNZ_OK) /* crc */
err=UNZ_ERRNO;
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.crc) &&
((uFlags & 8)==0))
err=UNZ_BADZIPFILE;
if (unzlocal_getLong(s->_stream,&uData) != UNZ_OK) /* size compr */
err=UNZ_ERRNO;
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compressed_size) &&
((uFlags & 8)==0))
err=UNZ_BADZIPFILE;
if (unzlocal_getLong(s->_stream,&uData) != UNZ_OK) /* size uncompr */
err=UNZ_ERRNO;
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.uncompressed_size) &&
((uFlags & 8)==0))
err=UNZ_BADZIPFILE;
if (unzlocal_getShort(s->_stream,&size_filename) != UNZ_OK)
err=UNZ_ERRNO;
else if ((err==UNZ_OK) && (size_filename!=s->cur_file_info.size_filename))
err=UNZ_BADZIPFILE;
*piSizeVar += (uInt)size_filename;
if (unzlocal_getShort(s->_stream,&size_extra_field) != UNZ_OK)
err=UNZ_ERRNO;
*poffset_local_extrafield= s->cur_file_info_internal.offset_curfile +
SIZEZIPLOCALHEADER + size_filename;
*psize_local_extrafield = (uInt)size_extra_field;
*piSizeVar += (uInt)size_extra_field;
return err;
}
/*
Open for reading data the current file in the zipfile.
If there is no error and the file is opened, the return value is UNZ_OK.
*/
int unzOpenCurrentFile (unzFile file) {
int err=UNZ_OK;
int Store;
uInt iSizeVar;
unz_s* s;
file_in_zip_read_info_s* pfile_in_zip_read_info;
uLong offset_local_extrafield; /* offset of the local extra field */
uInt size_local_extrafield; /* size of the local extra field */
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz_s*)file;
if (!s->current_file_ok)
return UNZ_PARAMERROR;
if (s->pfile_in_zip_read != NULL)
unzCloseCurrentFile(file);
if (unzlocal_CheckCurrentFileCoherencyHeader(s,&iSizeVar,
&offset_local_extrafield,&size_local_extrafield)!=UNZ_OK)
return UNZ_BADZIPFILE;
pfile_in_zip_read_info = (file_in_zip_read_info_s*) malloc(sizeof(file_in_zip_read_info_s));
if (pfile_in_zip_read_info==NULL)
return UNZ_INTERNALERROR;
pfile_in_zip_read_info->read_buffer=(char*)malloc(UNZ_BUFSIZE);
pfile_in_zip_read_info->offset_local_extrafield = offset_local_extrafield;
pfile_in_zip_read_info->size_local_extrafield = size_local_extrafield;
pfile_in_zip_read_info->pos_local_extrafield=0;
if (pfile_in_zip_read_info->read_buffer==NULL)
{
free(pfile_in_zip_read_info);
return UNZ_INTERNALERROR;
}
pfile_in_zip_read_info->stream_initialised=0;
if ((s->cur_file_info.compression_method!=0) &&
(s->cur_file_info.compression_method!=Z_DEFLATED))
err=UNZ_BADZIPFILE;
Store = s->cur_file_info.compression_method==0;
pfile_in_zip_read_info->crc32_wait=s->cur_file_info.crc;
pfile_in_zip_read_info->crc32_data=0;
pfile_in_zip_read_info->compression_method = s->cur_file_info.compression_method;
pfile_in_zip_read_info->_stream=s->_stream;
pfile_in_zip_read_info->byte_before_the_zipfile=s->byte_before_the_zipfile;
pfile_in_zip_read_info->stream.total_out = 0;
if (!Store) {
pfile_in_zip_read_info->stream.zalloc = (alloc_func)0;
pfile_in_zip_read_info->stream.zfree = (free_func)0;
pfile_in_zip_read_info->stream.opaque = (voidpf)0;
err=inflateInit2(&pfile_in_zip_read_info->stream, -MAX_WBITS);
if (err == Z_OK)
pfile_in_zip_read_info->stream_initialised = 1;
/* windowBits is passed < 0 to tell that there is no zlib header.
* Note that in this case inflate *requires* an extra "dummy" byte
* after the compressed stream in order to complete decompression and
* return Z_STREAM_END.
* In unzip, i don't wait absolutely Z_STREAM_END because I known the
* size of both compressed and uncompressed data
*/
}
pfile_in_zip_read_info->rest_read_compressed = s->cur_file_info.compressed_size;
pfile_in_zip_read_info->rest_read_uncompressed = s->cur_file_info.uncompressed_size;
pfile_in_zip_read_info->pos_in_zipfile =
s->cur_file_info_internal.offset_curfile + SIZEZIPLOCALHEADER + iSizeVar;
pfile_in_zip_read_info->stream.avail_in = (uInt)0;
s->pfile_in_zip_read = pfile_in_zip_read_info;
return UNZ_OK;
}
/*
Read bytes from the current file.
buf contain buffer where data must be copied
len the size of buf.
return the number of byte copied if somes bytes are copied
return 0 if the end of file was reached
return <0 with error code if there is an error
(UNZ_ERRNO for IO error, or zLib error for uncompress error)
*/
int unzReadCurrentFile(unzFile file, voidp buf, unsigned len) {
int err=UNZ_OK;
uInt iRead = 0;
unz_s* s;
file_in_zip_read_info_s* pfile_in_zip_read_info;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz_s*)file;
pfile_in_zip_read_info=s->pfile_in_zip_read;
if (pfile_in_zip_read_info==NULL)
return UNZ_PARAMERROR;
if ((pfile_in_zip_read_info->read_buffer == NULL))
return UNZ_END_OF_LIST_OF_FILE;
if (len==0)
return 0;
pfile_in_zip_read_info->stream.next_out = (Bytef*)buf;
pfile_in_zip_read_info->stream.avail_out = (uInt)len;
if (len>pfile_in_zip_read_info->rest_read_uncompressed)
pfile_in_zip_read_info->stream.avail_out =
(uInt)pfile_in_zip_read_info->rest_read_uncompressed;
while (pfile_in_zip_read_info->stream.avail_out>0) {
if ((pfile_in_zip_read_info->stream.avail_in==0) &&
(pfile_in_zip_read_info->rest_read_compressed>0)) {
uInt uReadThis = UNZ_BUFSIZE;
if (pfile_in_zip_read_info->rest_read_compressed<uReadThis)
uReadThis = (uInt)pfile_in_zip_read_info->rest_read_compressed;
if (uReadThis == 0)
return UNZ_EOF;
pfile_in_zip_read_info->_stream->seek(pfile_in_zip_read_info->pos_in_zipfile +
pfile_in_zip_read_info->byte_before_the_zipfile, SEEK_SET);
if (pfile_in_zip_read_info->_stream->ioFailed())
return UNZ_ERRNO;
if (pfile_in_zip_read_info->_stream->read(pfile_in_zip_read_info->read_buffer,uReadThis)!=uReadThis)
return UNZ_ERRNO;
pfile_in_zip_read_info->pos_in_zipfile += uReadThis;
pfile_in_zip_read_info->rest_read_compressed-=uReadThis;
pfile_in_zip_read_info->stream.next_in = (Bytef*)pfile_in_zip_read_info->read_buffer;
pfile_in_zip_read_info->stream.avail_in = (uInt)uReadThis;
}
if (pfile_in_zip_read_info->compression_method==0) {
uInt uDoCopy,i ;
if (pfile_in_zip_read_info->stream.avail_out < pfile_in_zip_read_info->stream.avail_in)
uDoCopy = pfile_in_zip_read_info->stream.avail_out ;
else
uDoCopy = pfile_in_zip_read_info->stream.avail_in ;
for (i=0;i<uDoCopy;i++)
*(pfile_in_zip_read_info->stream.next_out+i) = *(pfile_in_zip_read_info->stream.next_in+i);
pfile_in_zip_read_info->crc32_data = crc32(pfile_in_zip_read_info->crc32_data,
pfile_in_zip_read_info->stream.next_out,
uDoCopy);
pfile_in_zip_read_info->rest_read_uncompressed-=uDoCopy;
pfile_in_zip_read_info->stream.avail_in -= uDoCopy;
pfile_in_zip_read_info->stream.avail_out -= uDoCopy;
pfile_in_zip_read_info->stream.next_out += uDoCopy;
pfile_in_zip_read_info->stream.next_in += uDoCopy;
pfile_in_zip_read_info->stream.total_out += uDoCopy;
iRead += uDoCopy;
} else {
uLong uTotalOutBefore,uTotalOutAfter;
const Bytef *bufBefore;
uLong uOutThis;
int flush = Z_SYNC_FLUSH;
uTotalOutBefore = pfile_in_zip_read_info->stream.total_out;
bufBefore = pfile_in_zip_read_info->stream.next_out;
/*
if ((pfile_in_zip_read_info->rest_read_uncompressed ==
pfile_in_zip_read_info->stream.avail_out) &&
(pfile_in_zip_read_info->rest_read_compressed == 0))
flush = Z_FINISH;
*/
err=inflate(&pfile_in_zip_read_info->stream,flush);
uTotalOutAfter = pfile_in_zip_read_info->stream.total_out;
uOutThis = uTotalOutAfter-uTotalOutBefore;
pfile_in_zip_read_info->crc32_data =
crc32(pfile_in_zip_read_info->crc32_data,bufBefore, (uInt)(uOutThis));
pfile_in_zip_read_info->rest_read_uncompressed -= uOutThis;
iRead += (uInt)(uTotalOutAfter - uTotalOutBefore);
if (err==Z_STREAM_END)
return (iRead==0) ? UNZ_EOF : iRead;
if (err!=Z_OK)
break;
}
}
if (err==Z_OK)
return iRead;
return err;
}
/*
Give the current position in uncompressed data
*/
z_off_t unztell(unzFile file) {
unz_s* s;
file_in_zip_read_info_s* pfile_in_zip_read_info;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz_s*)file;
pfile_in_zip_read_info=s->pfile_in_zip_read;
if (pfile_in_zip_read_info==NULL)
return UNZ_PARAMERROR;
return (z_off_t)pfile_in_zip_read_info->stream.total_out;
}
/*
return 1 if the end of file was reached, 0 elsewhere
*/
int unzeof(unzFile file) {
unz_s* s;
file_in_zip_read_info_s* pfile_in_zip_read_info;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz_s*)file;
pfile_in_zip_read_info=s->pfile_in_zip_read;
if (pfile_in_zip_read_info==NULL)
return UNZ_PARAMERROR;
if (pfile_in_zip_read_info->rest_read_uncompressed == 0)
return 1;
else
return 0;
}
/*
Read extra field from the current file (opened by unzOpenCurrentFile)
This is the local-header version of the extra field (sometimes, there is
more info in the local-header version than in the central-header)
if buf==NULL, it return the size of the local extra field that can be read
if buf!=NULL, len is the size of the buffer, the extra header is copied in
buf.
the return value is the number of bytes copied in buf, or (if <0)
the error code
*/
int unzGetLocalExtrafield(unzFile file, voidp buf, unsigned len) {
unz_s* s;
file_in_zip_read_info_s* pfile_in_zip_read_info;
uInt read_now;
uLong size_to_read;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz_s*)file;
pfile_in_zip_read_info=s->pfile_in_zip_read;
if (pfile_in_zip_read_info==NULL)
return UNZ_PARAMERROR;
size_to_read = (pfile_in_zip_read_info->size_local_extrafield -
pfile_in_zip_read_info->pos_local_extrafield);
if (buf==NULL)
return (int)size_to_read;
if (len>size_to_read)
read_now = (uInt)size_to_read;
else
read_now = (uInt)len ;
if (read_now==0)
return 0;
pfile_in_zip_read_info->_stream->seek(pfile_in_zip_read_info->offset_local_extrafield +
pfile_in_zip_read_info->pos_local_extrafield,SEEK_SET);
if (pfile_in_zip_read_info->_stream->ioFailed())
return UNZ_ERRNO;
if (pfile_in_zip_read_info->_stream->read(buf,(uInt)size_to_read)!=size_to_read)
return UNZ_ERRNO;
return (int)read_now;
}
/*
Close the file in zip opened with unzipOpenCurrentFile
Return UNZ_CRCERROR if all the file was read but the CRC is not good
*/
int unzCloseCurrentFile(unzFile file) {
int err=UNZ_OK;
unz_s* s;
file_in_zip_read_info_s* pfile_in_zip_read_info;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz_s*)file;
pfile_in_zip_read_info=s->pfile_in_zip_read;
if (pfile_in_zip_read_info==NULL)
return UNZ_PARAMERROR;
if (pfile_in_zip_read_info->rest_read_uncompressed == 0) {
if (pfile_in_zip_read_info->crc32_data != pfile_in_zip_read_info->crc32_wait)
err=UNZ_CRCERROR;
}
free(pfile_in_zip_read_info->read_buffer);
pfile_in_zip_read_info->read_buffer = NULL;
if (pfile_in_zip_read_info->stream_initialised)
inflateEnd(&pfile_in_zip_read_info->stream);
pfile_in_zip_read_info->stream_initialised = 0;
free(pfile_in_zip_read_info);
s->pfile_in_zip_read=NULL;
return err;
}
/*
Get the global comment string of the ZipFile, in the szComment buffer.
uSizeBuf is the size of the szComment buffer.
return the number of byte copied or an error code <0
*/
int unzGetGlobalComment(unzFile file, char *szComment, uLong uSizeBuf) {
unz_s* s;
uLong uReadThis ;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz_s*)file;
uReadThis = uSizeBuf;
if (uReadThis>s->gi.size_comment)
uReadThis = s->gi.size_comment;
s->_stream->seek(s->central_pos+22, SEEK_SET);
if (s->_stream->ioFailed())
return UNZ_ERRNO;
if (uReadThis>0) {
*szComment='\0';
if (s->_stream->read(szComment,(uInt)uReadThis)!=uReadThis)
return UNZ_ERRNO;
}
if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment))
*(szComment+s->gi.size_comment)='\0';
return (int)uReadThis;
}
namespace Common {
/*
class ZipArchiveMember : public ArchiveMember {
unzFile _zipFile;
public:
ZipArchiveMember(FSNode &node) : _node(node) {
}
String getName() const {
...
}
SeekableReadStream *open() {
...
}
};
*/
ZipArchive::ZipArchive(const Common::String &name) {
SeekableReadStream *stream = SearchMan.createReadStreamForMember(name);
_zipFile = unzOpen(stream);
}
ZipArchive::ZipArchive(const Common::FSNode &node) {
SeekableReadStream *stream = node.createReadStream();
_zipFile = unzOpen(stream);
}
ZipArchive::ZipArchive(Common::SeekableReadStream *stream) {
_zipFile = unzOpen(stream);
}
ZipArchive::~ZipArchive() {
unzClose(_zipFile);
}
bool ZipArchive::isOpen() const {
return _zipFile != 0;
}
bool ZipArchive::hasFile(const Common::String &name) {
return (_zipFile && unzLocateFile(_zipFile, name.c_str(), 2) == UNZ_OK);
}
int ZipArchive::listMembers(Common::ArchiveMemberList &list) {
if (!_zipFile)
return 0;
int matches = 0;
int err = unzGoToFirstFile(_zipFile);
while (err == UNZ_OK) {
char szCurrentFileName[UNZ_MAXFILENAMEINZIP+1];
unzGetCurrentFileInfo(_zipFile, NULL,
szCurrentFileName, sizeof(szCurrentFileName)-1,
NULL, 0, NULL, 0);
list.push_back(ArchiveMemberList::value_type(new GenericArchiveMember(szCurrentFileName, this)));
matches++;
err = unzGoToNextFile(_zipFile);
}
return matches;
}
ArchiveMemberPtr ZipArchive::getMember(const String &name) {
if (!_zipFile || !hasFile(name))
return ArchiveMemberPtr();
return ArchiveMemberPtr(new GenericArchiveMember(name, this));
}
Common::SeekableReadStream *ZipArchive::createReadStreamForMember(const Common::String &name) const {
if (!_zipFile)
return 0;
unzLocateFile(_zipFile, name.c_str(), 2);
unz_file_info fileInfo;
unzOpenCurrentFile(_zipFile);
unzGetCurrentFileInfo(_zipFile, &fileInfo, NULL, 0, NULL, 0, NULL, 0);
byte *buffer = (byte *)calloc(fileInfo.uncompressed_size+1, 1);
assert(buffer);
unzReadCurrentFile(_zipFile, buffer, fileInfo.uncompressed_size);
unzCloseCurrentFile(_zipFile);
return new Common::MemoryReadStream(buffer, fileInfo.uncompressed_size+1, true);
// FIXME: instead of reading all into a memory stream, we could
// instead create a new ZipStream class. But then we have to be
// careful to handle the case where the client code opens multiple
// files in the archive and tries to use them indepenendtly.
}
} // End of namespace Common
#endif
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