mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-09-10 16:53:15 +02:00
1295 lines
36 KiB
C
1295 lines
36 KiB
C
/* unzip.c -- IO on .zip files using zlib
|
|
Version 0.15 beta, Mar 19th, 1998,
|
|
|
|
Read unzip.h for more info
|
|
*/
|
|
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <zlib.h>
|
|
#include "unzip.h"
|
|
|
|
#ifdef STDC
|
|
# include <stddef.h>
|
|
# include <string.h>
|
|
# include <stdlib.h>
|
|
#endif
|
|
#ifdef NO_ERRNO_H
|
|
extern int errno;
|
|
#else
|
|
#include <errno.h>
|
|
#endif
|
|
|
|
|
|
#ifndef local
|
|
#define local static
|
|
#endif
|
|
/* compile with -Dlocal if your debugger can't find static symbols */
|
|
|
|
|
|
|
|
#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
|
|
|
|
#ifndef ALLOC
|
|
# define ALLOC(size) (malloc(size))
|
|
#endif
|
|
#ifndef TRYFREE
|
|
# define TRYFREE(p) {if (p) free(p);}
|
|
#endif
|
|
|
|
#define SIZECENTRALDIRITEM (0x2e)
|
|
#define SIZEZIPLOCALHEADER (0x1e)
|
|
|
|
/* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */
|
|
|
|
#ifndef SEEK_CUR
|
|
#define SEEK_CUR 1
|
|
#endif
|
|
|
|
#ifndef SEEK_END
|
|
#define SEEK_END 2
|
|
#endif
|
|
|
|
#ifndef SEEK_SET
|
|
#define SEEK_SET 0
|
|
#endif
|
|
|
|
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 unz_file_info_internal_s
|
|
{
|
|
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; /* 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*/
|
|
FILE* file; /* 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
|
|
{
|
|
FILE* file; /* 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.
|
|
*/
|
|
|
|
|
|
local int unzlocal_getByte(fin,pi)
|
|
FILE *fin;
|
|
int *pi;
|
|
{
|
|
unsigned char c;
|
|
int err = fread(&c, 1, 1, fin);
|
|
if (err==1)
|
|
{
|
|
*pi = (int)c;
|
|
return UNZ_OK;
|
|
}
|
|
else
|
|
{
|
|
if (ferror(fin))
|
|
return UNZ_ERRNO;
|
|
else
|
|
return UNZ_EOF;
|
|
}
|
|
}
|
|
|
|
|
|
/* ===========================================================================
|
|
Reads a long in LSB order from the given gz_stream. Sets
|
|
*/
|
|
local int unzlocal_getShort (fin,pX)
|
|
FILE* fin;
|
|
uLong *pX;
|
|
{
|
|
uLong x ;
|
|
int i = 0;
|
|
int err;
|
|
|
|
err = unzlocal_getByte(fin,&i);
|
|
x = (uLong)i;
|
|
|
|
if (err==UNZ_OK)
|
|
err = unzlocal_getByte(fin,&i);
|
|
x += ((uLong)i)<<8;
|
|
|
|
if (err==UNZ_OK)
|
|
*pX = x;
|
|
else
|
|
*pX = 0;
|
|
return err;
|
|
}
|
|
|
|
local int unzlocal_getLong (fin,pX)
|
|
FILE* fin;
|
|
uLong *pX;
|
|
{
|
|
uLong x ;
|
|
int i = 0;
|
|
int err;
|
|
|
|
err = unzlocal_getByte(fin,&i);
|
|
x = (uLong)i;
|
|
|
|
if (err==UNZ_OK)
|
|
err = unzlocal_getByte(fin,&i);
|
|
x += ((uLong)i)<<8;
|
|
|
|
if (err==UNZ_OK)
|
|
err = unzlocal_getByte(fin,&i);
|
|
x += ((uLong)i)<<16;
|
|
|
|
if (err==UNZ_OK)
|
|
err = unzlocal_getByte(fin,&i);
|
|
x += ((uLong)i)<<24;
|
|
|
|
if (err==UNZ_OK)
|
|
*pX = x;
|
|
else
|
|
*pX = 0;
|
|
return err;
|
|
}
|
|
|
|
|
|
/* My own strcmpi / strcasecmp */
|
|
local int strcmpcasenosensitive_internal (fileName1,fileName2)
|
|
const char* fileName1;
|
|
const char* fileName2;
|
|
{
|
|
for (;;)
|
|
{
|
|
char c1=*(fileName1++);
|
|
char 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 int ZEXPORT unzStringFileNameCompare (fileName1,fileName2,iCaseSensitivity)
|
|
const char* fileName1;
|
|
const char* fileName2;
|
|
int iCaseSensitivity;
|
|
{
|
|
if (iCaseSensitivity==0)
|
|
iCaseSensitivity=CASESENSITIVITYDEFAULTVALUE;
|
|
|
|
if (iCaseSensitivity==1)
|
|
return strcmp(fileName1,fileName2);
|
|
|
|
return STRCMPCASENOSENTIVEFUNCTION(fileName1,fileName2);
|
|
}
|
|
|
|
#define BUFREADCOMMENT (0x400)
|
|
|
|
/*
|
|
Locate the Central directory of a zipfile (at the end, just before
|
|
the global comment)
|
|
*/
|
|
local uLong unzlocal_SearchCentralDir(fin)
|
|
FILE *fin;
|
|
{
|
|
unsigned char* buf;
|
|
uLong uSizeFile;
|
|
uLong uBackRead;
|
|
uLong uMaxBack=0xffff; /* maximum size of global comment */
|
|
uLong uPosFound=0;
|
|
|
|
if (fseek(fin,0,SEEK_END) != 0)
|
|
return 0;
|
|
|
|
|
|
uSizeFile = ftell( fin );
|
|
|
|
if (uMaxBack>uSizeFile)
|
|
uMaxBack = uSizeFile;
|
|
|
|
buf = (unsigned char*)ALLOC(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);
|
|
if (fseek(fin,uReadPos,SEEK_SET)!=0)
|
|
break;
|
|
|
|
if (fread(buf,(uInt)uReadSize,1,fin)!=1)
|
|
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\\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.
|
|
*/
|
|
extern unzFile ZEXPORT unzOpen (path)
|
|
const char *path;
|
|
{
|
|
unz_s us;
|
|
unz_s *s;
|
|
uLong central_pos,uL;
|
|
FILE * fin ;
|
|
|
|
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;
|
|
|
|
if (unz_copyright[0]!=' ')
|
|
return NULL;
|
|
|
|
fin=fopen(path,"rb");
|
|
if (fin==NULL)
|
|
return NULL;
|
|
|
|
central_pos = unzlocal_SearchCentralDir(fin);
|
|
if (central_pos==0)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (fseek(fin,central_pos,SEEK_SET)!=0)
|
|
err=UNZ_ERRNO;
|
|
|
|
/* the signature, already checked */
|
|
if (unzlocal_getLong(fin,&uL)!=UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
/* number of this disk */
|
|
if (unzlocal_getShort(fin,&number_disk)!=UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
/* number of the disk with the start of the central directory */
|
|
if (unzlocal_getShort(fin,&number_disk_with_CD)!=UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
/* total number of entries in the central dir on this disk */
|
|
if (unzlocal_getShort(fin,&us.gi.number_entry)!=UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
/* total number of entries in the central dir */
|
|
if (unzlocal_getShort(fin,&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(fin,&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(fin,&us.offset_central_dir)!=UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
/* zipfile comment length */
|
|
if (unzlocal_getShort(fin,&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)
|
|
{
|
|
fclose(fin);
|
|
return NULL;
|
|
}
|
|
|
|
us.file=fin;
|
|
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;
|
|
|
|
s=(unz_s*)ALLOC(sizeof(unz_s));
|
|
*s=us;
|
|
unzGoToFirstFile((unzFile)s);
|
|
return (unzFile)s;
|
|
}
|
|
|
|
|
|
/*
|
|
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 (file)
|
|
unzFile file;
|
|
{
|
|
unz_s* s;
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
|
|
if (s->pfile_in_zip_read!=NULL)
|
|
unzCloseCurrentFile(file);
|
|
|
|
fclose(s->file);
|
|
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 (file,pglobal_info)
|
|
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 (ulDosDate, ptm)
|
|
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 OF((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));
|
|
|
|
local int unzlocal_GetCurrentFileInfoInternal (file,
|
|
pfile_info,
|
|
pfile_info_internal,
|
|
szFileName, fileNameBufferSize,
|
|
extraField, extraFieldBufferSize,
|
|
szComment, commentBufferSize)
|
|
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;
|
|
if (fseek(s->file,s->pos_in_central_dir+s->byte_before_the_zipfile,SEEK_SET)!=0)
|
|
err=UNZ_ERRNO;
|
|
|
|
|
|
/* we check the magic */
|
|
if (err==UNZ_OK)
|
|
{
|
|
if (unzlocal_getLong(s->file,&uMagic) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
else if (uMagic!=0x02014b50)
|
|
err=UNZ_BADZIPFILE;
|
|
}
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.version) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.version_needed) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.flag) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.compression_method) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getLong(s->file,&file_info.dosDate) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
unzlocal_DosDateToTmuDate(file_info.dosDate,&file_info.tmu_date);
|
|
|
|
if (unzlocal_getLong(s->file,&file_info.crc) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getLong(s->file,&file_info.compressed_size) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getLong(s->file,&file_info.uncompressed_size) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.size_filename) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.size_file_extra) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.size_file_comment) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.disk_num_start) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.internal_fa) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getLong(s->file,&file_info.external_fa) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getLong(s->file,&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 (fread(szFileName,(uInt)uSizeRead,1,s->file)!=1)
|
|
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)
|
|
{
|
|
if (fseek(s->file,lSeek,SEEK_CUR)==0)
|
|
lSeek=0;
|
|
else
|
|
err=UNZ_ERRNO;
|
|
}
|
|
|
|
if ((file_info.size_file_extra>0) && (extraFieldBufferSize>0))
|
|
if (fread(extraField,(uInt)uSizeRead,1,s->file)!=1)
|
|
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)
|
|
{
|
|
if (fseek(s->file,lSeek,SEEK_CUR)==0)
|
|
lSeek=0;
|
|
else
|
|
err=UNZ_ERRNO;
|
|
}
|
|
|
|
if ((file_info.size_file_comment>0) && (commentBufferSize>0))
|
|
if (fread(szComment,(uInt)uSizeRead,1,s->file)!=1)
|
|
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.
|
|
*/
|
|
extern int ZEXPORT unzGetCurrentFileInfo (file,
|
|
pfile_info,
|
|
szFileName, fileNameBufferSize,
|
|
extraField, extraFieldBufferSize,
|
|
szComment, commentBufferSize)
|
|
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
|
|
*/
|
|
extern int ZEXPORT unzGoToFirstFile (file)
|
|
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 (file)
|
|
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
|
|
*/
|
|
extern int ZEXPORT unzLocateFile (file, szFileName, iCaseSensitivity)
|
|
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)
|
|
*/
|
|
local int unzlocal_CheckCurrentFileCoherencyHeader (s,piSizeVar,
|
|
poffset_local_extrafield,
|
|
psize_local_extrafield)
|
|
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 (fseek(s->file,s->cur_file_info_internal.offset_curfile +
|
|
s->byte_before_the_zipfile,SEEK_SET)!=0)
|
|
return UNZ_ERRNO;
|
|
|
|
|
|
if (err==UNZ_OK)
|
|
{
|
|
if (unzlocal_getLong(s->file,&uMagic) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
else if (uMagic!=0x04034b50)
|
|
err=UNZ_BADZIPFILE;
|
|
}
|
|
|
|
if (unzlocal_getShort(s->file,&uData) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
/*
|
|
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.wVersion))
|
|
err=UNZ_BADZIPFILE;
|
|
*/
|
|
if (unzlocal_getShort(s->file,&uFlags) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&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->file,&uData) != UNZ_OK) /* date/time */
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getLong(s->file,&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->file,&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->file,&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->file,&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->file,&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 unzOpenCurrentFile (file)
|
|
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*)
|
|
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;
|
|
|
|
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 ((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=0;
|
|
pfile_in_zip_read_info->compression_method =
|
|
s->cur_file_info.compression_method;
|
|
pfile_in_zip_read_info->file=s->file;
|
|
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)
|
|
*/
|
|
extern int ZEXPORT unzReadCurrentFile (file, buf, len)
|
|
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;
|
|
if (fseek(pfile_in_zip_read_info->file,
|
|
pfile_in_zip_read_info->pos_in_zipfile +
|
|
pfile_in_zip_read_info->byte_before_the_zipfile,SEEK_SET)!=0)
|
|
return UNZ_ERRNO;
|
|
if (fread(pfile_in_zip_read_info->read_buffer,uReadThis,1,
|
|
pfile_in_zip_read_info->file)!=1)
|
|
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 = 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
|
|
{
|
|
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 =
|
|
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;
|
|
}
|
|
|
|
|
|
/*
|
|
Give the current position in uncompressed data
|
|
*/
|
|
extern z_off_t ZEXPORT unztell (file)
|
|
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
|
|
*/
|
|
extern int ZEXPORT unzeof (file)
|
|
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
|
|
*/
|
|
extern int ZEXPORT unzGetLocalExtrafield (file,buf,len)
|
|
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;
|
|
|
|
if (fseek(pfile_in_zip_read_info->file,
|
|
pfile_in_zip_read_info->offset_local_extrafield +
|
|
pfile_in_zip_read_info->pos_local_extrafield,SEEK_SET)!=0)
|
|
return UNZ_ERRNO;
|
|
|
|
if (fread(buf,(uInt)size_to_read,1,pfile_in_zip_read_info->file)!=1)
|
|
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
|
|
*/
|
|
extern int ZEXPORT unzCloseCurrentFile (file)
|
|
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 != 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;
|
|
}
|
|
|
|
|
|
/*
|
|
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
|
|
*/
|
|
extern int ZEXPORT unzGetGlobalComment (file, szComment, uSizeBuf)
|
|
unzFile file;
|
|
char *szComment;
|
|
uLong uSizeBuf;
|
|
{
|
|
/* int err=UNZ_OK; */
|
|
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;
|
|
|
|
if (fseek(s->file,s->central_pos+22,SEEK_SET)!=0)
|
|
return UNZ_ERRNO;
|
|
|
|
if (uReadThis>0)
|
|
{
|
|
*szComment='\0';
|
|
if (fread(szComment,(uInt)uReadThis,1,s->file)!=1)
|
|
return UNZ_ERRNO;
|
|
}
|
|
|
|
if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment))
|
|
*(szComment+s->gi.size_comment)='\0';
|
|
return (int)uReadThis;
|
|
}
|