/*
* Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description:
*
*/
/* unzip.c -- IO for uncompress .zip files using zlib
Version 1.01e, February 12th, 2005
Copyright (C) 1998-2005 Gilles Vollant
Read unzip.h for more info
*/
/* Decryption code comes from crypt.c by Info-ZIP but has been greatly reduced in terms of
compatibility with older software. The following is from the original crypt.c. Code
woven in by Terry Thorsen 1/2003.
*/
/*
Copyright (c) 1990-2000 Info-ZIP. All rights reserved.
See the accompanying file LICENSE, version 2000-Apr-09 or later
(the contents of which are also included in zip.h) for terms of use.
If, for some reason, all these files are missing, the Info-ZIP license
also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html
*/
/*
crypt.c (full version) by Info-ZIP. Last revised: [see crypt.h]
The encryption/decryption parts of this source code (as opposed to the
non-echoing password parts) were originally written in Europe. The
whole source package can be freely distributed, including from the USA.
(Prior to January 2000, re-export from the US was a violation of US law.)
*/
/*
This encryption code is a direct transcription of the algorithm from
Roger Schlafly, described by Phil Katz in the file appnote.txt. This
file (appnote.txt) is distributed with the PKZIP program (even in the
version without encryption capabilities).
*/
#include "common.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
//When OE- zlib is used, change this to zlib.h
#ifdef _USE_OE_ZLIB_
#include <zlib.h>
#else
#include <ezlib.h>
#endif
#include "unzip.h"
#ifndef local
#define local static
#endif
/* compile with -Dlocal if your debugger can't find static symbols */
#ifndef CASESENSITIVITYDEFAULT_NO
# if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES)
# define CASESENSITIVITYDEFAULT_NO
# endif
#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 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll";
/* 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; /* 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*/
zlib_filefunc_def z_filefunc;
voidpf filestream; /* io structore of the zipfile */
uLong compression_method; /* compression method (0==store) */
uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
int raw;
} file_in_zip_read_info_s;
/* unz_s contain internal information about the zipfile
*/
typedef struct
{
zlib_filefunc_def z_filefunc;
voidpf filestream; /* 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 */
int encrypted;
# ifndef NOUNCRYPT
unsigned long keys[3]; /* keys defining the pseudo-random sequence */
const unsigned long* pcrc_32_tab;
# endif
} unz_s;
#ifndef NOUNCRYPT
#include "crypt.h"
#endif
/* ===========================================================================
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.
*/
local int unzlocal_getByte(const zlib_filefunc_def* pzlib_filefunc_def,
voidpf filestream,
int *pi)
{
unsigned char c;
int err = (int)ZREAD(*pzlib_filefunc_def,filestream,&c,1);
if (err==1)
{
*pi = (int)c;
return UNZ_OK;
}
else
{
if (ZERROR(*pzlib_filefunc_def,filestream))
return UNZ_ERRNO;
else
return UNZ_EOF;
}
}
/* ===========================================================================
Reads a long in LSB order from the given gz_stream. Sets
*/
local int unzlocal_getShort (const zlib_filefunc_def* pzlib_filefunc_def,
voidpf filestream,
uLong *pX)
{
uLong x ;
int i;
int err;
err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);
x = (uLong)i;
if (err==UNZ_OK)
err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);
x += ((uLong)i)<<8;
if (err==UNZ_OK)
*pX = x;
else
*pX = 0;
return err;
}
local int unzlocal_getLong (const zlib_filefunc_def* pzlib_filefunc_def,
voidpf filestream,
uLong *pX)
{
uLong x ;
int i;
int err;
err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);
x = (uLong)i;
if (err==UNZ_OK)
err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);
x += ((uLong)i)<<8;
if (err==UNZ_OK)
err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);
x += ((uLong)i)<<16;
if (err==UNZ_OK)
err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i);
x += ((uLong)i)<<24;
if (err==UNZ_OK)
*pX = x;
else
*pX = 0;
return err;
}
/* My own strcmpi / strcasecmp */
local int strcmpcasenosensitive_internal (const char* fileName1, const char* fileName2)
{
char c1;
char c2;
for (;;)
{
c1 =*(fileName1++);
c2 =*(fileName2++);
if ((c1>='a') && (c1<='z'))
c1 -= 0x20;
if ((c2>='a') && (c2<='z'))
c2 -= 0x20;
if (c1=='\0')
return ((c2=='\0') ? 0 : -1);
if (c2=='\0')
return 1;
if (c1<c2)
return -1;
if (c1>c2)
return 1;
}
}
#ifdef CASESENSITIVITYDEFAULT_NO
#define CASESENSITIVITYDEFAULTVALUE 2
#else
#define CASESENSITIVITYDEFAULTVALUE 1
#endif
#ifndef STRCMPCASENOSENTIVEFUNCTION
#define STRCMPCASENOSENTIVEFUNCTION strcmpcasenosensitive_internal
#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)
*/
//extern
#ifndef BUFREADCOMMENT
#define BUFREADCOMMENT (0x400)
#endif
/*
Locate the Central directory of a zipfile (at the end, just before
the global comment)
*/
int ZEXPORT unzStringFileNameCompare (const char* fileName1,
const char* fileName2,
int iCaseSensitivity)
{
if (iCaseSensitivity==0)
iCaseSensitivity=CASESENSITIVITYDEFAULTVALUE;
if (iCaseSensitivity==1)
return strcmp(fileName1,fileName2);
return STRCMPCASENOSENTIVEFUNCTION(fileName1,fileName2);
}
local uLong unzlocal_SearchCentralDir(const zlib_filefunc_def* pzlib_filefunc_def,
voidpf filestream)
{
unsigned char* buf = NULL;
uLong uSizeFile;
uLong uBackRead;
uLong uMaxBack=0xffff; /* maximum size of global comment */
uLong uPosFound=0;
uLong uReadSize,uReadPos ;
int i;
if (ZSEEK(*pzlib_filefunc_def,filestream,0,ZLIB_FILEFUNC_SEEK_END) != 0)
return 0;
uSizeFile = ZTELL(*pzlib_filefunc_def,filestream);
if (uMaxBack>uSizeFile)
uMaxBack = uSizeFile;
buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
if (buf==NULL)
return 0;
uBackRead = 4;
while (uBackRead<uMaxBack)
{
if (uBackRead+BUFREADCOMMENT>uMaxBack)
uBackRead = uMaxBack;
else
uBackRead+=BUFREADCOMMENT;
uReadPos = uSizeFile-uBackRead ;
uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ?
(BUFREADCOMMENT+4) : (uSizeFile-uReadPos);
if (ZSEEK(*pzlib_filefunc_def,filestream,uReadPos,ZLIB_FILEFUNC_SEEK_SET)!=0)
break;
if (ZREAD(*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;
}
/*
Open a Zip file. path contain the full pathname (by example,
on a Windows NT computer "c:\\test\\zlib114.zip" or on an Unix computer
"zlib/zlib114.zip".
If the zipfile cannot be opened (file doesn'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.
*/
//extern
unzFile ZEXPORT unzOpen2 (const char *path, zlib_filefunc_def* pzlib_filefunc_def)
{
unz_s *us = NULL; //heap_alloc - size is 180
unz_s *s = NULL;
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;
//printf("size of unz_s is %d\n", sizeof(unz_s));
if (unz_copyright[0]!=' ')
return NULL;
us = (unz_s*)ALLOC(sizeof(unz_s));
if (!us) {
return NULL;
}
if (pzlib_filefunc_def==NULL)
fill_fopen_filefunc(&us->z_filefunc);
else
us->z_filefunc = *pzlib_filefunc_def;
us->filestream= (*(us->z_filefunc.zopen_file))(us->z_filefunc.opaque,
path,
ZLIB_FILEFUNC_MODE_READ |
ZLIB_FILEFUNC_MODE_EXISTING);
if (us->filestream==NULL) {
TRYFREE(us);
return NULL;
}
central_pos = unzlocal_SearchCentralDir(&us->z_filefunc,us->filestream);
if (central_pos==0)
err=UNZ_ERRNO;
if (ZSEEK(us->z_filefunc, us->filestream,
central_pos,ZLIB_FILEFUNC_SEEK_SET)!=0)
err=UNZ_ERRNO;
/* the signature, already checked */
if (unzlocal_getLong(&us->z_filefunc, us->filestream,&uL)!=UNZ_OK)
err=UNZ_ERRNO;
/* number of this disk */
if (unzlocal_getShort(&us->z_filefunc, us->filestream,&number_disk)!=UNZ_OK)
err=UNZ_ERRNO;
/* number of the disk with the start of the central directory */
if (unzlocal_getShort(&us->z_filefunc, us->filestream,&number_disk_with_CD)!=UNZ_OK)
err=UNZ_ERRNO;
/* total number of entries in the central dir on this disk */
if (unzlocal_getShort(&us->z_filefunc, us->filestream,&us->gi.number_entry)!=UNZ_OK)
err=UNZ_ERRNO;
/* total number of entries in the central dir */
if (unzlocal_getShort(&us->z_filefunc, us->filestream,&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->z_filefunc, us->filestream,&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->z_filefunc, us->filestream,&us->offset_central_dir)!=UNZ_OK)
err=UNZ_ERRNO;
/* zipfile comment length */
if (unzlocal_getShort(&us->z_filefunc, us->filestream,&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)
{
ZCLOSE(us->z_filefunc, us->filestream);
TRYFREE(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;
us->encrypted = 0;
// Don't free "us". Return the memory allocated
//s=(unz_s*)ALLOC(sizeof(unz_s));
//*s=us;
s=us;
unzGoToFirstFile((unzFile)s);
return (unzFile)s;
}
//extern
unzFile ZEXPORT unzOpen (const char *path)
{
return unzOpen2(path, NULL);
}
/*
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. */
//extern
int ZEXPORT 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);
ZCLOSE(s->z_filefunc, s->filestream);
TRYFREE(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. */
//extern
int ZEXPORT 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)
*/
local 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
*/
//local
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)
{
int err = UNZ_OK;
unz_s* s;
unz_file_info file_info;
unz_file_info_internal file_info_internal;
uLong uMagic = 0;
long lSeek = 0;
uLong uSizeRead;
if (file==NULL)
return UNZ_PARAMERROR;
s=(unz_s*)file;
if (ZSEEK(s->z_filefunc, s->filestream,
s->pos_in_central_dir+s->byte_before_the_zipfile,
ZLIB_FILEFUNC_SEEK_SET)!=0)
err=UNZ_ERRNO;
/* we check the magic */
if (err==UNZ_OK)
if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uMagic) != UNZ_OK)
err=UNZ_ERRNO;
else if (uMagic!=0x02014b50)
err=UNZ_BADZIPFILE;
if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.version) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.version_needed) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.flag) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.compression_method) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.dosDate) != UNZ_OK)
err=UNZ_ERRNO;
unzlocal_DosDateToTmuDate(file_info.dosDate,&file_info.tmu_date);
if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.crc) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.compressed_size) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.uncompressed_size) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.size_filename) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_extra) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_comment) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.disk_num_start) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.internal_fa) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.external_fa) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info_internal.offset_curfile) != UNZ_OK)
err=UNZ_ERRNO;
lSeek+=file_info.size_filename;
if ((err==UNZ_OK) && (szFileName!=NULL))
{
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 (ZREAD(s->z_filefunc, s->filestream,szFileName,uSizeRead)!=uSizeRead)
err=UNZ_ERRNO;
lSeek -= uSizeRead;
}
if ((err==UNZ_OK) && (extraField!=NULL))
{
if (file_info.size_file_extra<extraFieldBufferSize)
uSizeRead = file_info.size_file_extra;
else
uSizeRead = extraFieldBufferSize;
if (lSeek!=0)
if (ZSEEK(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
lSeek=0;
else
err=UNZ_ERRNO;
if ((file_info.size_file_extra>0) && (extraFieldBufferSize>0))
if (ZREAD(s->z_filefunc, s->filestream,extraField,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))
{
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)
if (ZSEEK(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
lSeek=0;
else
err=UNZ_ERRNO;
if ((file_info.size_file_comment>0) && (commentBufferSize>0))
if (ZREAD(s->z_filefunc, s->filestream,szComment,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;
}
/*
Set the current file of the zipfile to the first file.
return UNZ_OK if there is no problem
*/
//extern
int ZEXPORT 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.
*/
//extern
int ZEXPORT 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->gi.number_entry != 0xffff) /* 2^16 files overflow hack */
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
*/
//extern
int ZEXPORT unzLocateFile (unzFile file, const char *szFileName, int iCaseSensitivity)
{
unz_s* s;
int err;
/* We remember the 'current' position in the file so that we can jump
* back there if we fail.
*/
unz_file_info cur_file_infoSaved;
unz_file_info_internal cur_file_info_internalSaved;
uLong num_fileSaved;
uLong pos_in_central_dirSaved;
char *szCurrentFileName = NULL;
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;
}
/* Save the current state */
num_fileSaved = s->num_file;
pos_in_central_dirSaved = s->pos_in_central_dir;
cur_file_infoSaved = s->cur_file_info;
cur_file_info_internalSaved = s->cur_file_info_internal;
err = unzGoToFirstFile(file);
szCurrentFileName = (char*) ALLOC(UNZ_MAXFILENAMEINZIP+1); // heap_alloc - 256
while (err == UNZ_OK)
{
err = unzlocal_GetCurrentFileInfoInternal(file,NULL, NULL,
szCurrentFileName,sizeof(szCurrentFileName)-1,
NULL,0,NULL,0);
if (err == UNZ_OK)
{
if (unzStringFileNameCompare(szCurrentFileName,
szFileName,iCaseSensitivity)==0) {
TRYFREE(szCurrentFileName);
return UNZ_OK;
}
err = unzGoToNextFile(file);
}
}
TRYFREE(szCurrentFileName);
/* We failed, so restore the state of the 'current file' to where we
* were.
*/
s->num_file = num_fileSaved ;
s->pos_in_central_dir = pos_in_central_dirSaved ;
s->cur_file_info = cur_file_infoSaved;
s->cur_file_info_internal = cur_file_info_internalSaved;
return err;
}
/*
///////////////////////////////////////////
// Contributed by Ryan Haksi (mailto://cryogen@infoserve.net)
// I need random access
//
// Further optimization could be realized by adding an ability
// to cache the directory in memory. The goal being a single
// comprehensive file read to put the file I need in a memory.
*/
/*
typedef struct unz_file_pos_s
{
uLong pos_in_zip_directory; // offset in file
uLong num_of_file; // # of file
} unz_file_pos;
*/
//extern
int ZEXPORT unzGetFilePos(unzFile file, unz_file_pos* file_pos)
{
unz_s* s;
if (file==NULL || file_pos==NULL)
return UNZ_PARAMERROR;
s=(unz_s*)file;
if (!s->current_file_ok)
return UNZ_END_OF_LIST_OF_FILE;
file_pos->pos_in_zip_directory = s->pos_in_central_dir;
file_pos->num_of_file = s->num_file;
return UNZ_OK;
}
//extern
int ZEXPORT unzGoToFilePos(unzFile file, unz_file_pos* file_pos)
{
unz_s* s;
int err;
if (file==NULL || file_pos==NULL)
return UNZ_PARAMERROR;
s=(unz_s*)file;
/* jump to the right spot */
s->pos_in_central_dir = file_pos->pos_in_zip_directory;
s->num_file = file_pos->num_of_file;
/* set the current file */
err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,
&s->cur_file_info_internal,
NULL,0,NULL,0,NULL,0);
/* return results */
s->current_file_ok = (err == UNZ_OK);
return err;
}
/*
// Unzip Helper Functions - should be here?
///////////////////////////////////////////
*/
/*
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)
*/
local 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;
if (ZSEEK(s->z_filefunc, s->filestream,s->cur_file_info_internal.offset_curfile +
s->byte_before_the_zipfile,ZLIB_FILEFUNC_SEEK_SET)!=0)
return UNZ_ERRNO;
if (err==UNZ_OK)
if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uMagic) != UNZ_OK)
err=UNZ_ERRNO;
else if (uMagic!=0x04034b50)
err=UNZ_BADZIPFILE;
if (unzlocal_getShort(&s->z_filefunc, s->filestream,&uData) != UNZ_OK)
err=UNZ_ERRNO;
/*
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.wVersion))
err=UNZ_BADZIPFILE;
*/
if (unzlocal_getShort(&s->z_filefunc, s->filestream,&uFlags) != UNZ_OK)
err=UNZ_ERRNO;
if (unzlocal_getShort(&s->z_filefunc, s->filestream,&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->z_filefunc, s->filestream,&uData) != UNZ_OK) /* date/time */
err=UNZ_ERRNO;
if (unzlocal_getLong(&s->z_filefunc, s->filestream,&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->z_filefunc, s->filestream,&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->z_filefunc, s->filestream,&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->z_filefunc, s->filestream,&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->z_filefunc, s->filestream,&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.
*/
//extern
int ZEXPORT unzOpenCurrentFile3 (unzFile file,
int* method,
int* level,
int raw,
const char* password)
{
int err=UNZ_OK;
uInt iSizeVar;
unz_s* s;
file_in_zip_read_info_s* pfile_in_zip_read_info = NULL;
uLong offset_local_extrafield; /* offset of the local extra field */
uInt size_local_extrafield; /* size of the local extra field */
# ifndef NOUNCRYPT
char source[12];
# else
if (password != NULL)
return UNZ_PARAMERROR;
# endif
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*)
ALLOC(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*)ALLOC(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;
pfile_in_zip_read_info->raw=raw;
if (pfile_in_zip_read_info->read_buffer==NULL)
{
TRYFREE(pfile_in_zip_read_info);
return UNZ_INTERNALERROR;
}
pfile_in_zip_read_info->stream_initialised=0;
if (method!=NULL)
*method = (int)s->cur_file_info.compression_method;
if (level!=NULL)
{
*level = 6;
switch (s->cur_file_info.flag & 0x06)
{
case 6 : *level = 1; break;
case 4 : *level = 2; break;
case 2 : *level = 9; break;
}
}
if ((s->cur_file_info.compression_method!=0) &&
(s->cur_file_info.compression_method!=Z_DEFLATED))
err=UNZ_BADZIPFILE;
pfile_in_zip_read_info->crc32_wait=s->cur_file_info.crc;
pfile_in_zip_read_info->crc32=0;
pfile_in_zip_read_info->compression_method =
s->cur_file_info.compression_method;
pfile_in_zip_read_info->filestream=s->filestream;
pfile_in_zip_read_info->z_filefunc=s->z_filefunc;
pfile_in_zip_read_info->byte_before_the_zipfile=s->byte_before_the_zipfile;
pfile_in_zip_read_info->stream.total_out = 0;
if ((s->cur_file_info.compression_method==Z_DEFLATED) &&
(!raw))
{
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;
pfile_in_zip_read_info->stream.next_in = (voidpf)0;
pfile_in_zip_read_info->stream.avail_in = 0;
err=inflateInit2(&pfile_in_zip_read_info->stream, -MAX_WBITS);
if (err == Z_OK)
pfile_in_zip_read_info->stream_initialised=1;
else
{
TRYFREE(pfile_in_zip_read_info);
return err;
}
/* 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;
# ifndef NOUNCRYPT
if (password != NULL)
{
s->pcrc_32_tab = get_crc_table();
init_keys(password,s->keys,s->pcrc_32_tab);
if (ZSEEK(s->z_filefunc, s->filestream,
s->pfile_in_zip_read->pos_in_zipfile +
s->pfile_in_zip_read->byte_before_the_zipfile,
SEEK_SET)!=0)
return UNZ_INTERNALERROR;
if(ZREAD(s->z_filefunc, s->filestream,source, 12)<12)
return UNZ_INTERNALERROR;
for (i = 0; i<12; i++)
zdecode(s->keys,s->pcrc_32_tab,source[i]);
s->pfile_in_zip_read->pos_in_zipfile+=12;
s->encrypted=1;
}
# endif
return UNZ_OK;
}
//extern
int ZEXPORT unzOpenCurrentFile (unzFile file)
{
return unzOpenCurrentFile3(file, NULL, NULL, 0, NULL);
}
//extern
int ZEXPORT unzOpenCurrentFilePassword (unzFile file, const char* password)
{
return unzOpenCurrentFile3(file, NULL, NULL, 0, password);
}
//extern
int ZEXPORT unzOpenCurrentFile2 (unzFile file, int* method, int* level, int raw)
{
return unzOpenCurrentFile3(file, method, level, raw, NULL);
}
/*
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)
*/
//extern
int ZEXPORT unzReadCurrentFile (unzFile file, voidp buf, unsigned len)
{
int err=UNZ_OK;
uInt iRead = 0;
unz_s* s = NULL;
file_in_zip_read_info_s* pfile_in_zip_read_info;
uInt uReadThis = UNZ_BUFSIZE;
uInt i = 0;
uInt uDoCopy = 0;
uLong uTotalOutBefore,uTotalOutAfter;
const Bytef *bufBefore;
uLong uOutThis;
int flush=Z_SYNC_FLUSH;
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->raw)))
pfile_in_zip_read_info->stream.avail_out =
(uInt)pfile_in_zip_read_info->rest_read_uncompressed;
if ((len>pfile_in_zip_read_info->rest_read_compressed+
pfile_in_zip_read_info->stream.avail_in) &&
(pfile_in_zip_read_info->raw))
pfile_in_zip_read_info->stream.avail_out =
(uInt)pfile_in_zip_read_info->rest_read_compressed+
pfile_in_zip_read_info->stream.avail_in;
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))
{
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;
if (ZSEEK(pfile_in_zip_read_info->z_filefunc,
pfile_in_zip_read_info->filestream,
pfile_in_zip_read_info->pos_in_zipfile +
pfile_in_zip_read_info->byte_before_the_zipfile,
ZLIB_FILEFUNC_SEEK_SET)!=0)
return UNZ_ERRNO;
if (ZREAD(pfile_in_zip_read_info->z_filefunc,
pfile_in_zip_read_info->filestream,
pfile_in_zip_read_info->read_buffer,
uReadThis)!=uReadThis)
return UNZ_ERRNO;
# ifndef NOUNCRYPT
if(s->encrypted)
{
for(i=0;i<uReadThis;i++)
pfile_in_zip_read_info->read_buffer[i] =
zdecode(s->keys,s->pcrc_32_tab,
pfile_in_zip_read_info->read_buffer[i]);
}
# endif
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) || (pfile_in_zip_read_info->raw))
{
if ((pfile_in_zip_read_info->stream.avail_in == 0) &&
(pfile_in_zip_read_info->rest_read_compressed == 0))
return (iRead==0) ? UNZ_EOF : iRead;
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 = crc32(pfile_in_zip_read_info->crc32,
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
{
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);
if ((err>=0) && (pfile_in_zip_read_info->stream.msg!=NULL))
err = Z_DATA_ERROR;
uTotalOutAfter = pfile_in_zip_read_info->stream.total_out;
uOutThis = uTotalOutAfter-uTotalOutBefore;
pfile_in_zip_read_info->crc32 =
crc32(pfile_in_zip_read_info->crc32,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;
}
/*
Close the file in zip opened with unzipOpenCurrentFile
Return UNZ_CRCERROR if all the file was read but the CRC is not good
*/
//extern
int ZEXPORT 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) &&
(!pfile_in_zip_read_info->raw))
{
if (pfile_in_zip_read_info->crc32 != pfile_in_zip_read_info->crc32_wait)
err=UNZ_CRCERROR;
}
TRYFREE(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;
TRYFREE(pfile_in_zip_read_info);
s->pfile_in_zip_read=NULL;
return err;
}