/* 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 <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 */ | |
#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 | |
#ifndef ALLOC | |
# define ALLOC(size) (malloc(size)) | |
#endif | |
#ifndef TRYFREE | |
# define TRYFREE(p) {if (p) free(p);} | |
#endif | |
#define SIZECENTRALDIRITEM (0x2e) | |
#define SIZEZIPLOCALHEADER (0x1e) | |
const char unz_copyright[] = | |
" unzip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll"; | |
/* 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*/ | |
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 OF(( | |
const zlib_filefunc_def* pzlib_filefunc_def, | |
voidpf filestream, | |
int *pi)); | |
local int unzlocal_getByte(pzlib_filefunc_def,filestream,pi) | |
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 OF(( | |
const zlib_filefunc_def* pzlib_filefunc_def, | |
voidpf filestream, | |
uLong *pX)); | |
local int unzlocal_getShort (pzlib_filefunc_def,filestream,pX) | |
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 OF(( | |
const zlib_filefunc_def* pzlib_filefunc_def, | |
voidpf filestream, | |
uLong *pX)); | |
local int unzlocal_getLong (pzlib_filefunc_def,filestream,pX) | |
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 (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); | |
} | |
#ifndef BUFREADCOMMENT | |
#define BUFREADCOMMENT (0x400) | |
#endif | |
/* | |
Locate the Central directory of a zipfile (at the end, just before | |
the global comment) | |
*/ | |
local uLong unzlocal_SearchCentralDir OF(( | |
const zlib_filefunc_def* pzlib_filefunc_def, | |
voidpf filestream)); | |
local uLong unzlocal_SearchCentralDir(pzlib_filefunc_def,filestream) | |
const zlib_filefunc_def* pzlib_filefunc_def; | |
voidpf filestream; | |
{ | |
unsigned char* buf; | |
uLong uSizeFile; | |
uLong uBackRead; | |
uLong uMaxBack=0xffff; /* maximum size of global comment */ | |
uLong uPosFound=0; | |
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) | |
{ | |
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 (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 (path, pzlib_filefunc_def) | |
const char *path; | |
zlib_filefunc_def* pzlib_filefunc_def; | |
{ | |
unz_s us; | |
unz_s *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; | |
if (unz_copyright[0]!=' ') | |
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) | |
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); | |
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; | |
s=(unz_s*)ALLOC(sizeof(unz_s)); | |
*s=us; | |
unzGoToFirstFile((unzFile)s); | |
return (unzFile)s; | |
} | |
extern unzFile ZEXPORT unzOpen (path) | |
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 (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); | |
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 (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 (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)) | |
{ | |
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 (ZREAD(s->z_filefunc, s->filestream,szFileName,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) | |
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)) | |
{ | |
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 (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; | |
} | |
/* | |
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->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 (file, szFileName, iCaseSensitivity) | |
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; | |
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); | |
while (err == UNZ_OK) | |
{ | |
char szCurrentFileName[UNZ_MAXFILENAMEINZIP+1]; | |
err = unzGetCurrentFileInfo(file,NULL, | |
szCurrentFileName,sizeof(szCurrentFileName)-1, | |
NULL,0,NULL,0); | |
if (err == UNZ_OK) | |
{ | |
if (unzStringFileNameCompare(szCurrentFileName, | |
szFileName,iCaseSensitivity)==0) | |
return UNZ_OK; | |
err = unzGoToNextFile(file); | |
} | |
} | |
/* 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(file, file_pos) | |
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(file, file_pos) | |
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 (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 (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 (file, method, level, raw, password) | |
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; | |
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) | |
{ | |
int i; | |
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 (file) | |
unzFile file; | |
{ | |
return unzOpenCurrentFile3(file, NULL, NULL, 0, NULL); | |
} | |
extern int ZEXPORT unzOpenCurrentFilePassword (file, password) | |
unzFile file; | |
const char* password; | |
{ | |
return unzOpenCurrentFile3(file, NULL, NULL, 0, password); | |
} | |
extern int ZEXPORT unzOpenCurrentFile2 (file,method,level,raw) | |
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 (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->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)) | |
{ | |
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 (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) | |
{ | |
uInt i; | |
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)) | |
{ | |
uInt uDoCopy,i ; | |
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 | |
{ | |
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); | |
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; | |
} | |
/* | |
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 (ZSEEK(pfile_in_zip_read_info->z_filefunc, | |
pfile_in_zip_read_info->filestream, | |
pfile_in_zip_read_info->offset_local_extrafield + | |
pfile_in_zip_read_info->pos_local_extrafield, | |
ZLIB_FILEFUNC_SEEK_SET)!=0) | |
return UNZ_ERRNO; | |
if (ZREAD(pfile_in_zip_read_info->z_filefunc, | |
pfile_in_zip_read_info->filestream, | |
buf,read_now)!=read_now) | |
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) && | |
(!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; | |
} | |
/* | |
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 (ZSEEK(s->z_filefunc,s->filestream,s->central_pos+22,ZLIB_FILEFUNC_SEEK_SET)!=0) | |
return UNZ_ERRNO; | |
if (uReadThis>0) | |
{ | |
*szComment='\0'; | |
if (ZREAD(s->z_filefunc,s->filestream,szComment,uReadThis)!=uReadThis) | |
return UNZ_ERRNO; | |
} | |
if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment)) | |
*(szComment+s->gi.size_comment)='\0'; | |
return (int)uReadThis; | |
} | |
/* Additions by RX '2004 */ | |
extern uLong ZEXPORT unzGetOffset (file) | |
unzFile file; | |
{ | |
unz_s* s; | |
if (file==NULL) | |
return UNZ_PARAMERROR; | |
s=(unz_s*)file; | |
if (!s->current_file_ok) | |
return 0; | |
if (s->gi.number_entry != 0 && s->gi.number_entry != 0xffff) | |
if (s->num_file==s->gi.number_entry) | |
return 0; | |
return s->pos_in_central_dir; | |
} | |
extern int ZEXPORT unzSetOffset (file, pos) | |
unzFile file; | |
uLong pos; | |
{ | |
unz_s* s; | |
int err; | |
if (file==NULL) | |
return UNZ_PARAMERROR; | |
s=(unz_s*)file; | |
s->pos_in_central_dir = pos; | |
s->num_file = s->gi.number_entry; /* hack */ | |
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; | |
} |