Chris@4: /* unzip.c -- IO for uncompress .zip files using zlib
Chris@4:    Version 1.1, February 14h, 2010
Chris@4:    part of the MiniZip project - ( http://www.winimage.com/zLibDll/minizip.html )
Chris@4: 
Chris@4:          Copyright (C) 1998-2010 Gilles Vollant (minizip) ( http://www.winimage.com/zLibDll/minizip.html )
Chris@4: 
Chris@4:          Modifications of Unzip for Zip64
Chris@4:          Copyright (C) 2007-2008 Even Rouault
Chris@4: 
Chris@4:          Modifications for Zip64 support on both zip and unzip
Chris@4:          Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )
Chris@4: 
Chris@4:          For more info read MiniZip_info.txt
Chris@4: 
Chris@4: 
Chris@4:   ------------------------------------------------------------------------------------
Chris@4:   Decryption code comes from crypt.c by Info-ZIP but has been greatly reduced in terms of
Chris@4:   compatibility with older software. The following is from the original crypt.c.
Chris@4:   Code woven in by Terry Thorsen 1/2003.
Chris@4: 
Chris@4:   Copyright (c) 1990-2000 Info-ZIP.  All rights reserved.
Chris@4: 
Chris@4:   See the accompanying file LICENSE, version 2000-Apr-09 or later
Chris@4:   (the contents of which are also included in zip.h) for terms of use.
Chris@4:   If, for some reason, all these files are missing, the Info-ZIP license
Chris@4:   also may be found at:  ftp://ftp.info-zip.org/pub/infozip/license.html
Chris@4: 
Chris@4:         crypt.c (full version) by Info-ZIP.      Last revised:  [see crypt.h]
Chris@4: 
Chris@4:   The encryption/decryption parts of this source code (as opposed to the
Chris@4:   non-echoing password parts) were originally written in Europe.  The
Chris@4:   whole source package can be freely distributed, including from the USA.
Chris@4:   (Prior to January 2000, re-export from the US was a violation of US law.)
Chris@4: 
Chris@4:         This encryption code is a direct transcription of the algorithm from
Chris@4:   Roger Schlafly, described by Phil Katz in the file appnote.txt.  This
Chris@4:   file (appnote.txt) is distributed with the PKZIP program (even in the
Chris@4:   version without encryption capabilities).
Chris@4: 
Chris@4:         ------------------------------------------------------------------------------------
Chris@4: 
Chris@4:         Changes in unzip.c
Chris@4: 
Chris@4:         2007-2008 - Even Rouault - Addition of cpl_unzGetCurrentFileZStreamPos
Chris@4:   2007-2008 - Even Rouault - Decoration of symbol names unz* -> cpl_unz*
Chris@4:   2007-2008 - Even Rouault - Remove old C style function prototypes
Chris@4:   2007-2008 - Even Rouault - Add unzip support for ZIP64
Chris@4: 
Chris@4:         Copyright (C) 2007-2008 Even Rouault
Chris@4: 
Chris@4: 
Chris@4:         Oct-2009 - Mathias Svensson - Removed cpl_* from symbol names (Even Rouault added them but since this is now moved to a new project (minizip64) I renamed them again).
Chris@4:   Oct-2009 - Mathias Svensson - Fixed problem if uncompressed size was > 4G and compressed size was <4G
Chris@4:                                 should only read the compressed/uncompressed size from the Zip64 format if
Chris@4:                                 the size from normal header was 0xFFFFFFFF
Chris@4:   Oct-2009 - Mathias Svensson - Applied some bug fixes from paches recived from Gilles Vollant
Chris@4:         Oct-2009 - Mathias Svensson - Applied support to unzip files with compression mathod BZIP2 (bzip2 lib is required)
Chris@4:                                 Patch created by Daniel Borca
Chris@4: 
Chris@4:   Jan-2010 - back to unzip and minizip 1.0 name scheme, with compatibility layer
Chris@4: 
Chris@4:   Copyright (C) 1998 - 2010 Gilles Vollant, Even Rouault, Mathias Svensson
Chris@4: 
Chris@4: */
Chris@4: 
Chris@4: 
Chris@4: #include <stdio.h>
Chris@4: #include <stdlib.h>
Chris@4: #include <string.h>
Chris@4: 
Chris@4: #ifndef NOUNCRYPT
Chris@4:         #define NOUNCRYPT
Chris@4: #endif
Chris@4: 
Chris@4: #include "zlib.h"
Chris@4: #include "unzip.h"
Chris@4: 
Chris@4: #ifdef STDC
Chris@4: #  include <stddef.h>
Chris@4: #  include <string.h>
Chris@4: #  include <stdlib.h>
Chris@4: #endif
Chris@4: #ifdef NO_ERRNO_H
Chris@4:     extern int errno;
Chris@4: #else
Chris@4: #   include <errno.h>
Chris@4: #endif
Chris@4: 
Chris@4: 
Chris@4: #ifndef local
Chris@4: #  define local static
Chris@4: #endif
Chris@4: /* compile with -Dlocal if your debugger can't find static symbols */
Chris@4: 
Chris@4: 
Chris@4: #ifndef CASESENSITIVITYDEFAULT_NO
Chris@4: #  if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES)
Chris@4: #    define CASESENSITIVITYDEFAULT_NO
Chris@4: #  endif
Chris@4: #endif
Chris@4: 
Chris@4: 
Chris@4: #ifndef UNZ_BUFSIZE
Chris@4: #define UNZ_BUFSIZE (16384)
Chris@4: #endif
Chris@4: 
Chris@4: #ifndef UNZ_MAXFILENAMEINZIP
Chris@4: #define UNZ_MAXFILENAMEINZIP (256)
Chris@4: #endif
Chris@4: 
Chris@4: #ifndef ALLOC
Chris@4: # define ALLOC(size) (malloc(size))
Chris@4: #endif
Chris@4: #ifndef TRYFREE
Chris@4: # define TRYFREE(p) {if (p) free(p);}
Chris@4: #endif
Chris@4: 
Chris@4: #define SIZECENTRALDIRITEM (0x2e)
Chris@4: #define SIZEZIPLOCALHEADER (0x1e)
Chris@4: 
Chris@4: 
Chris@4: const char unz_copyright[] =
Chris@4:    " unzip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll";
Chris@4: 
Chris@4: /* unz_file_info_interntal contain internal info about a file in zipfile*/
Chris@4: typedef struct unz_file_info64_internal_s
Chris@4: {
Chris@4:     ZPOS64_T offset_curfile;/* relative offset of local header 8 bytes */
Chris@4: } unz_file_info64_internal;
Chris@4: 
Chris@4: 
Chris@4: /* file_in_zip_read_info_s contain internal information about a file in zipfile,
Chris@4:     when reading and decompress it */
Chris@4: typedef struct
Chris@4: {
Chris@4:     char  *read_buffer;         /* internal buffer for compressed data */
Chris@4:     z_stream stream;            /* zLib stream structure for inflate */
Chris@4: 
Chris@4: #ifdef HAVE_BZIP2
Chris@4:     bz_stream bstream;          /* bzLib stream structure for bziped */
Chris@4: #endif
Chris@4: 
Chris@4:     ZPOS64_T pos_in_zipfile;       /* position in byte on the zipfile, for fseek*/
Chris@4:     uLong stream_initialised;   /* flag set if stream structure is initialised*/
Chris@4: 
Chris@4:     ZPOS64_T offset_local_extrafield;/* offset of the local extra field */
Chris@4:     uInt  size_local_extrafield;/* size of the local extra field */
Chris@4:     ZPOS64_T pos_local_extrafield;   /* position in the local extra field in read*/
Chris@4:     ZPOS64_T total_out_64;
Chris@4: 
Chris@4:     uLong crc32;                /* crc32 of all data uncompressed */
Chris@4:     uLong crc32_wait;           /* crc32 we must obtain after decompress all */
Chris@4:     ZPOS64_T rest_read_compressed; /* number of byte to be decompressed */
Chris@4:     ZPOS64_T rest_read_uncompressed;/*number of byte to be obtained after decomp*/
Chris@4:     zlib_filefunc64_32_def z_filefunc;
Chris@4:     voidpf filestream;        /* io structore of the zipfile */
Chris@4:     uLong compression_method;   /* compression method (0==store) */
Chris@4:     ZPOS64_T byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
Chris@4:     int   raw;
Chris@4: } file_in_zip64_read_info_s;
Chris@4: 
Chris@4: 
Chris@4: /* unz64_s contain internal information about the zipfile
Chris@4: */
Chris@4: typedef struct
Chris@4: {
Chris@4:     zlib_filefunc64_32_def z_filefunc;
Chris@4:     int is64bitOpenFunction;
Chris@4:     voidpf filestream;        /* io structore of the zipfile */
Chris@4:     unz_global_info64 gi;       /* public global information */
Chris@4:     ZPOS64_T byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
Chris@4:     ZPOS64_T num_file;             /* number of the current file in the zipfile*/
Chris@4:     ZPOS64_T pos_in_central_dir;   /* pos of the current file in the central dir*/
Chris@4:     ZPOS64_T current_file_ok;      /* flag about the usability of the current file*/
Chris@4:     ZPOS64_T central_pos;          /* position of the beginning of the central dir*/
Chris@4: 
Chris@4:     ZPOS64_T size_central_dir;     /* size of the central directory  */
Chris@4:     ZPOS64_T offset_central_dir;   /* offset of start of central directory with
Chris@4:                                    respect to the starting disk number */
Chris@4: 
Chris@4:     unz_file_info64 cur_file_info; /* public info about the current file in zip*/
Chris@4:     unz_file_info64_internal cur_file_info_internal; /* private info about it*/
Chris@4:     file_in_zip64_read_info_s* pfile_in_zip_read; /* structure about the current
Chris@4:                                         file if we are decompressing it */
Chris@4:     int encrypted;
Chris@4: 
Chris@4:     int isZip64;
Chris@4: 
Chris@4: #    ifndef NOUNCRYPT
Chris@4:     unsigned long keys[3];     /* keys defining the pseudo-random sequence */
Chris@4:     const unsigned long* pcrc_32_tab;
Chris@4: #    endif
Chris@4: } unz64_s;
Chris@4: 
Chris@4: 
Chris@4: #ifndef NOUNCRYPT
Chris@4: #include "crypt.h"
Chris@4: #endif
Chris@4: 
Chris@4: /* ===========================================================================
Chris@4:      Read a byte from a gz_stream; update next_in and avail_in. Return EOF
Chris@4:    for end of file.
Chris@4:    IN assertion: the stream s has been sucessfully opened for reading.
Chris@4: */
Chris@4: 
Chris@4: 
Chris@4: local int unz64local_getByte OF((
Chris@4:     const zlib_filefunc64_32_def* pzlib_filefunc_def,
Chris@4:     voidpf filestream,
Chris@4:     int *pi));
Chris@4: 
Chris@4: local int unz64local_getByte(const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream, int *pi)
Chris@4: {
Chris@4:     unsigned char c;
Chris@4:     int err = (int)ZREAD64(*pzlib_filefunc_def,filestream,&c,1);
Chris@4:     if (err==1)
Chris@4:     {
Chris@4:         *pi = (int)c;
Chris@4:         return UNZ_OK;
Chris@4:     }
Chris@4:     else
Chris@4:     {
Chris@4:         if (ZERROR64(*pzlib_filefunc_def,filestream))
Chris@4:             return UNZ_ERRNO;
Chris@4:         else
Chris@4:             return UNZ_EOF;
Chris@4:     }
Chris@4: }
Chris@4: 
Chris@4: 
Chris@4: /* ===========================================================================
Chris@4:    Reads a long in LSB order from the given gz_stream. Sets
Chris@4: */
Chris@4: local int unz64local_getShort OF((
Chris@4:     const zlib_filefunc64_32_def* pzlib_filefunc_def,
Chris@4:     voidpf filestream,
Chris@4:     uLong *pX));
Chris@4: 
Chris@4: local int unz64local_getShort (const zlib_filefunc64_32_def* pzlib_filefunc_def,
Chris@4:                              voidpf filestream,
Chris@4:                              uLong *pX)
Chris@4: {
Chris@4:     uLong x ;
Chris@4:     int i = 0;
Chris@4:     int err;
Chris@4: 
Chris@4:     err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
Chris@4:     x = (uLong)i;
Chris@4: 
Chris@4:     if (err==UNZ_OK)
Chris@4:         err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
Chris@4:     x |= ((uLong)i)<<8;
Chris@4: 
Chris@4:     if (err==UNZ_OK)
Chris@4:         *pX = x;
Chris@4:     else
Chris@4:         *pX = 0;
Chris@4:     return err;
Chris@4: }
Chris@4: 
Chris@4: local int unz64local_getLong OF((
Chris@4:     const zlib_filefunc64_32_def* pzlib_filefunc_def,
Chris@4:     voidpf filestream,
Chris@4:     uLong *pX));
Chris@4: 
Chris@4: local int unz64local_getLong (const zlib_filefunc64_32_def* pzlib_filefunc_def,
Chris@4:                             voidpf filestream,
Chris@4:                             uLong *pX)
Chris@4: {
Chris@4:     uLong x ;
Chris@4:     int i = 0;
Chris@4:     int err;
Chris@4: 
Chris@4:     err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
Chris@4:     x = (uLong)i;
Chris@4: 
Chris@4:     if (err==UNZ_OK)
Chris@4:         err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
Chris@4:     x |= ((uLong)i)<<8;
Chris@4: 
Chris@4:     if (err==UNZ_OK)
Chris@4:         err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
Chris@4:     x |= ((uLong)i)<<16;
Chris@4: 
Chris@4:     if (err==UNZ_OK)
Chris@4:         err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
Chris@4:     x += ((uLong)i)<<24;
Chris@4: 
Chris@4:     if (err==UNZ_OK)
Chris@4:         *pX = x;
Chris@4:     else
Chris@4:         *pX = 0;
Chris@4:     return err;
Chris@4: }
Chris@4: 
Chris@4: local int unz64local_getLong64 OF((
Chris@4:     const zlib_filefunc64_32_def* pzlib_filefunc_def,
Chris@4:     voidpf filestream,
Chris@4:     ZPOS64_T *pX));
Chris@4: 
Chris@4: 
Chris@4: local int unz64local_getLong64 (const zlib_filefunc64_32_def* pzlib_filefunc_def,
Chris@4:                             voidpf filestream,
Chris@4:                             ZPOS64_T *pX)
Chris@4: {
Chris@4:     ZPOS64_T x ;
Chris@4:     int i = 0;
Chris@4:     int err;
Chris@4: 
Chris@4:     err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
Chris@4:     x = (ZPOS64_T)i;
Chris@4: 
Chris@4:     if (err==UNZ_OK)
Chris@4:         err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
Chris@4:     x |= ((ZPOS64_T)i)<<8;
Chris@4: 
Chris@4:     if (err==UNZ_OK)
Chris@4:         err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
Chris@4:     x |= ((ZPOS64_T)i)<<16;
Chris@4: 
Chris@4:     if (err==UNZ_OK)
Chris@4:         err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
Chris@4:     x |= ((ZPOS64_T)i)<<24;
Chris@4: 
Chris@4:     if (err==UNZ_OK)
Chris@4:         err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
Chris@4:     x |= ((ZPOS64_T)i)<<32;
Chris@4: 
Chris@4:     if (err==UNZ_OK)
Chris@4:         err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
Chris@4:     x |= ((ZPOS64_T)i)<<40;
Chris@4: 
Chris@4:     if (err==UNZ_OK)
Chris@4:         err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
Chris@4:     x |= ((ZPOS64_T)i)<<48;
Chris@4: 
Chris@4:     if (err==UNZ_OK)
Chris@4:         err = unz64local_getByte(pzlib_filefunc_def,filestream,&i);
Chris@4:     x |= ((ZPOS64_T)i)<<56;
Chris@4: 
Chris@4:     if (err==UNZ_OK)
Chris@4:         *pX = x;
Chris@4:     else
Chris@4:         *pX = 0;
Chris@4:     return err;
Chris@4: }
Chris@4: 
Chris@4: /* My own strcmpi / strcasecmp */
Chris@4: local int strcmpcasenosensitive_internal (const char* fileName1, const char* fileName2)
Chris@4: {
Chris@4:     for (;;)
Chris@4:     {
Chris@4:         char c1=*(fileName1++);
Chris@4:         char c2=*(fileName2++);
Chris@4:         if ((c1>='a') && (c1<='z'))
Chris@4:             c1 -= 0x20;
Chris@4:         if ((c2>='a') && (c2<='z'))
Chris@4:             c2 -= 0x20;
Chris@4:         if (c1=='\0')
Chris@4:             return ((c2=='\0') ? 0 : -1);
Chris@4:         if (c2=='\0')
Chris@4:             return 1;
Chris@4:         if (c1<c2)
Chris@4:             return -1;
Chris@4:         if (c1>c2)
Chris@4:             return 1;
Chris@4:     }
Chris@4: }
Chris@4: 
Chris@4: 
Chris@4: #ifdef  CASESENSITIVITYDEFAULT_NO
Chris@4: #define CASESENSITIVITYDEFAULTVALUE 2
Chris@4: #else
Chris@4: #define CASESENSITIVITYDEFAULTVALUE 1
Chris@4: #endif
Chris@4: 
Chris@4: #ifndef STRCMPCASENOSENTIVEFUNCTION
Chris@4: #define STRCMPCASENOSENTIVEFUNCTION strcmpcasenosensitive_internal
Chris@4: #endif
Chris@4: 
Chris@4: /*
Chris@4:    Compare two filename (fileName1,fileName2).
Chris@4:    If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp)
Chris@4:    If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi
Chris@4:                                                                 or strcasecmp)
Chris@4:    If iCaseSenisivity = 0, case sensitivity is defaut of your operating system
Chris@4:         (like 1 on Unix, 2 on Windows)
Chris@4: 
Chris@4: */
Chris@4: extern int ZEXPORT unzStringFileNameCompare (const char*  fileName1,
Chris@4:                                                  const char*  fileName2,
Chris@4:                                                  int iCaseSensitivity)
Chris@4: 
Chris@4: {
Chris@4:     if (iCaseSensitivity==0)
Chris@4:         iCaseSensitivity=CASESENSITIVITYDEFAULTVALUE;
Chris@4: 
Chris@4:     if (iCaseSensitivity==1)
Chris@4:         return strcmp(fileName1,fileName2);
Chris@4: 
Chris@4:     return STRCMPCASENOSENTIVEFUNCTION(fileName1,fileName2);
Chris@4: }
Chris@4: 
Chris@4: #ifndef BUFREADCOMMENT
Chris@4: #define BUFREADCOMMENT (0x400)
Chris@4: #endif
Chris@4: 
Chris@4: /*
Chris@4:   Locate the Central directory of a zipfile (at the end, just before
Chris@4:     the global comment)
Chris@4: */
Chris@4: local ZPOS64_T unz64local_SearchCentralDir OF((const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream));
Chris@4: local ZPOS64_T unz64local_SearchCentralDir(const zlib_filefunc64_32_def* pzlib_filefunc_def, voidpf filestream)
Chris@4: {
Chris@4:     unsigned char* buf;
Chris@4:     ZPOS64_T uSizeFile;
Chris@4:     ZPOS64_T uBackRead;
Chris@4:     ZPOS64_T uMaxBack=0xffff; /* maximum size of global comment */
Chris@4:     ZPOS64_T uPosFound=0;
Chris@4: 
Chris@4:     if (ZSEEK64(*pzlib_filefunc_def,filestream,0,ZLIB_FILEFUNC_SEEK_END) != 0)
Chris@4:         return 0;
Chris@4: 
Chris@4: 
Chris@4:     uSizeFile = ZTELL64(*pzlib_filefunc_def,filestream);
Chris@4: 
Chris@4:     if (uMaxBack>uSizeFile)
Chris@4:         uMaxBack = uSizeFile;
Chris@4: 
Chris@4:     buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
Chris@4:     if (buf==NULL)
Chris@4:         return 0;
Chris@4: 
Chris@4:     uBackRead = 4;
Chris@4:     while (uBackRead<uMaxBack)
Chris@4:     {
Chris@4:         uLong uReadSize;
Chris@4:         ZPOS64_T uReadPos ;
Chris@4:         int i;
Chris@4:         if (uBackRead+BUFREADCOMMENT>uMaxBack)
Chris@4:             uBackRead = uMaxBack;
Chris@4:         else
Chris@4:             uBackRead+=BUFREADCOMMENT;
Chris@4:         uReadPos = uSizeFile-uBackRead ;
Chris@4: 
Chris@4:         uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ?
Chris@4:                      (BUFREADCOMMENT+4) : (uLong)(uSizeFile-uReadPos);
Chris@4:         if (ZSEEK64(*pzlib_filefunc_def,filestream,uReadPos,ZLIB_FILEFUNC_SEEK_SET)!=0)
Chris@4:             break;
Chris@4: 
Chris@4:         if (ZREAD64(*pzlib_filefunc_def,filestream,buf,uReadSize)!=uReadSize)
Chris@4:             break;
Chris@4: 
Chris@4:         for (i=(int)uReadSize-3; (i--)>0;)
Chris@4:             if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
Chris@4:                 ((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06))
Chris@4:             {
Chris@4:                 uPosFound = uReadPos+i;
Chris@4:                 break;
Chris@4:             }
Chris@4: 
Chris@4:         if (uPosFound!=0)
Chris@4:             break;
Chris@4:     }
Chris@4:     TRYFREE(buf);
Chris@4:     return uPosFound;
Chris@4: }
Chris@4: 
Chris@4: 
Chris@4: /*
Chris@4:   Locate the Central directory 64 of a zipfile (at the end, just before
Chris@4:     the global comment)
Chris@4: */
Chris@4: local ZPOS64_T unz64local_SearchCentralDir64 OF((
Chris@4:     const zlib_filefunc64_32_def* pzlib_filefunc_def,
Chris@4:     voidpf filestream));
Chris@4: 
Chris@4: local ZPOS64_T unz64local_SearchCentralDir64(const zlib_filefunc64_32_def* pzlib_filefunc_def,
Chris@4:                                       voidpf filestream)
Chris@4: {
Chris@4:     unsigned char* buf;
Chris@4:     ZPOS64_T uSizeFile;
Chris@4:     ZPOS64_T uBackRead;
Chris@4:     ZPOS64_T uMaxBack=0xffff; /* maximum size of global comment */
Chris@4:     ZPOS64_T uPosFound=0;
Chris@4:     uLong uL;
Chris@4:                 ZPOS64_T relativeOffset;
Chris@4: 
Chris@4:     if (ZSEEK64(*pzlib_filefunc_def,filestream,0,ZLIB_FILEFUNC_SEEK_END) != 0)
Chris@4:         return 0;
Chris@4: 
Chris@4: 
Chris@4:     uSizeFile = ZTELL64(*pzlib_filefunc_def,filestream);
Chris@4: 
Chris@4:     if (uMaxBack>uSizeFile)
Chris@4:         uMaxBack = uSizeFile;
Chris@4: 
Chris@4:     buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
Chris@4:     if (buf==NULL)
Chris@4:         return 0;
Chris@4: 
Chris@4:     uBackRead = 4;
Chris@4:     while (uBackRead<uMaxBack)
Chris@4:     {
Chris@4:         uLong uReadSize;
Chris@4:         ZPOS64_T uReadPos;
Chris@4:         int i;
Chris@4:         if (uBackRead+BUFREADCOMMENT>uMaxBack)
Chris@4:             uBackRead = uMaxBack;
Chris@4:         else
Chris@4:             uBackRead+=BUFREADCOMMENT;
Chris@4:         uReadPos = uSizeFile-uBackRead ;
Chris@4: 
Chris@4:         uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ?
Chris@4:                      (BUFREADCOMMENT+4) : (uLong)(uSizeFile-uReadPos);
Chris@4:         if (ZSEEK64(*pzlib_filefunc_def,filestream,uReadPos,ZLIB_FILEFUNC_SEEK_SET)!=0)
Chris@4:             break;
Chris@4: 
Chris@4:         if (ZREAD64(*pzlib_filefunc_def,filestream,buf,uReadSize)!=uReadSize)
Chris@4:             break;
Chris@4: 
Chris@4:         for (i=(int)uReadSize-3; (i--)>0;)
Chris@4:             if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
Chris@4:                 ((*(buf+i+2))==0x06) && ((*(buf+i+3))==0x07))
Chris@4:             {
Chris@4:                 uPosFound = uReadPos+i;
Chris@4:                 break;
Chris@4:             }
Chris@4: 
Chris@4:         if (uPosFound!=0)
Chris@4:             break;
Chris@4:     }
Chris@4:     TRYFREE(buf);
Chris@4:     if (uPosFound == 0)
Chris@4:         return 0;
Chris@4: 
Chris@4:     /* Zip64 end of central directory locator */
Chris@4:     if (ZSEEK64(*pzlib_filefunc_def,filestream, uPosFound,ZLIB_FILEFUNC_SEEK_SET)!=0)
Chris@4:         return 0;
Chris@4: 
Chris@4:     /* the signature, already checked */
Chris@4:     if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
Chris@4:         return 0;
Chris@4: 
Chris@4:     /* number of the disk with the start of the zip64 end of  central directory */
Chris@4:     if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
Chris@4:         return 0;
Chris@4:     if (uL != 0)
Chris@4:         return 0;
Chris@4: 
Chris@4:     /* relative offset of the zip64 end of central directory record */
Chris@4:     if (unz64local_getLong64(pzlib_filefunc_def,filestream,&relativeOffset)!=UNZ_OK)
Chris@4:         return 0;
Chris@4: 
Chris@4:     /* total number of disks */
Chris@4:     if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
Chris@4:         return 0;
Chris@4:     if (uL != 1)
Chris@4:         return 0;
Chris@4: 
Chris@4:     /* Goto end of central directory record */
Chris@4:     if (ZSEEK64(*pzlib_filefunc_def,filestream, relativeOffset,ZLIB_FILEFUNC_SEEK_SET)!=0)
Chris@4:         return 0;
Chris@4: 
Chris@4:      /* the signature */
Chris@4:     if (unz64local_getLong(pzlib_filefunc_def,filestream,&uL)!=UNZ_OK)
Chris@4:         return 0;
Chris@4: 
Chris@4:     if (uL != 0x06064b50)
Chris@4:         return 0;
Chris@4: 
Chris@4:     return relativeOffset;
Chris@4: }
Chris@4: 
Chris@4: /*
Chris@4:   Open a Zip file. path contain the full pathname (by example,
Chris@4:      on a Windows NT computer "c:\\test\\zlib114.zip" or on an Unix computer
Chris@4:      "zlib/zlib114.zip".
Chris@4:      If the zipfile cannot be opened (file doesn't exist or in not valid), the
Chris@4:        return value is NULL.
Chris@4:      Else, the return value is a unzFile Handle, usable with other function
Chris@4:        of this unzip package.
Chris@4: */
Chris@4: local unzFile unzOpenInternal (const void *path,
Chris@4:                                zlib_filefunc64_32_def* pzlib_filefunc64_32_def,
Chris@4:                                int is64bitOpenFunction)
Chris@4: {
Chris@4:     unz64_s us;
Chris@4:     unz64_s *s;
Chris@4:     ZPOS64_T central_pos;
Chris@4:     uLong   uL;
Chris@4: 
Chris@4:     uLong number_disk;          /* number of the current dist, used for
Chris@4:                                    spaning ZIP, unsupported, always 0*/
Chris@4:     uLong number_disk_with_CD;  /* number the the disk with central dir, used
Chris@4:                                    for spaning ZIP, unsupported, always 0*/
Chris@4:     ZPOS64_T number_entry_CD;      /* total number of entries in
Chris@4:                                    the central dir
Chris@4:                                    (same than number_entry on nospan) */
Chris@4: 
Chris@4:     int err=UNZ_OK;
Chris@4: 
Chris@4:     if (unz_copyright[0]!=' ')
Chris@4:         return NULL;
Chris@4: 
Chris@4:     us.z_filefunc.zseek32_file = NULL;
Chris@4:     us.z_filefunc.ztell32_file = NULL;
Chris@4:     if (pzlib_filefunc64_32_def==NULL)
Chris@4:         fill_fopen64_filefunc(&us.z_filefunc.zfile_func64);
Chris@4:     else
Chris@4:         us.z_filefunc = *pzlib_filefunc64_32_def;
Chris@4:     us.is64bitOpenFunction = is64bitOpenFunction;
Chris@4: 
Chris@4: 
Chris@4: 
Chris@4:     us.filestream = ZOPEN64(us.z_filefunc,
Chris@4:                                                  path,
Chris@4:                                                  ZLIB_FILEFUNC_MODE_READ |
Chris@4:                                                  ZLIB_FILEFUNC_MODE_EXISTING);
Chris@4:     if (us.filestream==NULL)
Chris@4:         return NULL;
Chris@4: 
Chris@4:     central_pos = unz64local_SearchCentralDir64(&us.z_filefunc,us.filestream);
Chris@4:     if (central_pos)
Chris@4:     {
Chris@4:         uLong uS;
Chris@4:         ZPOS64_T uL64;
Chris@4: 
Chris@4:         us.isZip64 = 1;
Chris@4: 
Chris@4:         if (ZSEEK64(us.z_filefunc, us.filestream,
Chris@4:                                       central_pos,ZLIB_FILEFUNC_SEEK_SET)!=0)
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4:         /* the signature, already checked */
Chris@4:         if (unz64local_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4: 
Chris@4:         /* size of zip64 end of central directory record */
Chris@4:         if (unz64local_getLong64(&us.z_filefunc, us.filestream,&uL64)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4: 
Chris@4:         /* version made by */
Chris@4:         if (unz64local_getShort(&us.z_filefunc, us.filestream,&uS)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4: 
Chris@4:         /* version needed to extract */
Chris@4:         if (unz64local_getShort(&us.z_filefunc, us.filestream,&uS)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4: 
Chris@4:         /* number of this disk */
Chris@4:         if (unz64local_getLong(&us.z_filefunc, us.filestream,&number_disk)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4: 
Chris@4:         /* number of the disk with the start of the central directory */
Chris@4:         if (unz64local_getLong(&us.z_filefunc, us.filestream,&number_disk_with_CD)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4: 
Chris@4:         /* total number of entries in the central directory on this disk */
Chris@4:         if (unz64local_getLong64(&us.z_filefunc, us.filestream,&us.gi.number_entry)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4: 
Chris@4:         /* total number of entries in the central directory */
Chris@4:         if (unz64local_getLong64(&us.z_filefunc, us.filestream,&number_entry_CD)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4: 
Chris@4:         if ((number_entry_CD!=us.gi.number_entry) ||
Chris@4:             (number_disk_with_CD!=0) ||
Chris@4:             (number_disk!=0))
Chris@4:             err=UNZ_BADZIPFILE;
Chris@4: 
Chris@4:         /* size of the central directory */
Chris@4:         if (unz64local_getLong64(&us.z_filefunc, us.filestream,&us.size_central_dir)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4: 
Chris@4:         /* offset of start of central directory with respect to the
Chris@4:           starting disk number */
Chris@4:         if (unz64local_getLong64(&us.z_filefunc, us.filestream,&us.offset_central_dir)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4: 
Chris@4:         us.gi.size_comment = 0;
Chris@4:     }
Chris@4:     else
Chris@4:     {
Chris@4:         central_pos = unz64local_SearchCentralDir(&us.z_filefunc,us.filestream);
Chris@4:         if (central_pos==0)
Chris@4:             err=UNZ_ERRNO;
Chris@4: 
Chris@4:         us.isZip64 = 0;
Chris@4: 
Chris@4:         if (ZSEEK64(us.z_filefunc, us.filestream,
Chris@4:                                         central_pos,ZLIB_FILEFUNC_SEEK_SET)!=0)
Chris@4:             err=UNZ_ERRNO;
Chris@4: 
Chris@4:         /* the signature, already checked */
Chris@4:         if (unz64local_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4: 
Chris@4:         /* number of this disk */
Chris@4:         if (unz64local_getShort(&us.z_filefunc, us.filestream,&number_disk)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4: 
Chris@4:         /* number of the disk with the start of the central directory */
Chris@4:         if (unz64local_getShort(&us.z_filefunc, us.filestream,&number_disk_with_CD)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4: 
Chris@4:         /* total number of entries in the central dir on this disk */
Chris@4:         if (unz64local_getShort(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4:         us.gi.number_entry = uL;
Chris@4: 
Chris@4:         /* total number of entries in the central dir */
Chris@4:         if (unz64local_getShort(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4:         number_entry_CD = uL;
Chris@4: 
Chris@4:         if ((number_entry_CD!=us.gi.number_entry) ||
Chris@4:             (number_disk_with_CD!=0) ||
Chris@4:             (number_disk!=0))
Chris@4:             err=UNZ_BADZIPFILE;
Chris@4: 
Chris@4:         /* size of the central directory */
Chris@4:         if (unz64local_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4:         us.size_central_dir = uL;
Chris@4: 
Chris@4:         /* offset of start of central directory with respect to the
Chris@4:             starting disk number */
Chris@4:         if (unz64local_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4:         us.offset_central_dir = uL;
Chris@4: 
Chris@4:         /* zipfile comment length */
Chris@4:         if (unz64local_getShort(&us.z_filefunc, us.filestream,&us.gi.size_comment)!=UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4:     }
Chris@4: 
Chris@4:     if ((central_pos<us.offset_central_dir+us.size_central_dir) &&
Chris@4:         (err==UNZ_OK))
Chris@4:         err=UNZ_BADZIPFILE;
Chris@4: 
Chris@4:     if (err!=UNZ_OK)
Chris@4:     {
Chris@4:         ZCLOSE64(us.z_filefunc, us.filestream);
Chris@4:         return NULL;
Chris@4:     }
Chris@4: 
Chris@4:     us.byte_before_the_zipfile = central_pos -
Chris@4:                             (us.offset_central_dir+us.size_central_dir);
Chris@4:     us.central_pos = central_pos;
Chris@4:     us.pfile_in_zip_read = NULL;
Chris@4:     us.encrypted = 0;
Chris@4: 
Chris@4: 
Chris@4:     s=(unz64_s*)ALLOC(sizeof(unz64_s));
Chris@4:     if( s != NULL)
Chris@4:     {
Chris@4:         *s=us;
Chris@4:         unzGoToFirstFile((unzFile)s);
Chris@4:     }
Chris@4:     return (unzFile)s;
Chris@4: }
Chris@4: 
Chris@4: 
Chris@4: extern unzFile ZEXPORT unzOpen2 (const char *path,
Chris@4:                                         zlib_filefunc_def* pzlib_filefunc32_def)
Chris@4: {
Chris@4:     if (pzlib_filefunc32_def != NULL)
Chris@4:     {
Chris@4:         zlib_filefunc64_32_def zlib_filefunc64_32_def_fill;
Chris@4:         fill_zlib_filefunc64_32_def_from_filefunc32(&zlib_filefunc64_32_def_fill,pzlib_filefunc32_def);
Chris@4:         return unzOpenInternal(path, &zlib_filefunc64_32_def_fill, 0);
Chris@4:     }
Chris@4:     else
Chris@4:         return unzOpenInternal(path, NULL, 0);
Chris@4: }
Chris@4: 
Chris@4: extern unzFile ZEXPORT unzOpen2_64 (const void *path,
Chris@4:                                      zlib_filefunc64_def* pzlib_filefunc_def)
Chris@4: {
Chris@4:     if (pzlib_filefunc_def != NULL)
Chris@4:     {
Chris@4:         zlib_filefunc64_32_def zlib_filefunc64_32_def_fill;
Chris@4:         zlib_filefunc64_32_def_fill.zfile_func64 = *pzlib_filefunc_def;
Chris@4:         zlib_filefunc64_32_def_fill.ztell32_file = NULL;
Chris@4:         zlib_filefunc64_32_def_fill.zseek32_file = NULL;
Chris@4:         return unzOpenInternal(path, &zlib_filefunc64_32_def_fill, 1);
Chris@4:     }
Chris@4:     else
Chris@4:         return unzOpenInternal(path, NULL, 1);
Chris@4: }
Chris@4: 
Chris@4: extern unzFile ZEXPORT unzOpen (const char *path)
Chris@4: {
Chris@4:     return unzOpenInternal(path, NULL, 0);
Chris@4: }
Chris@4: 
Chris@4: extern unzFile ZEXPORT unzOpen64 (const void *path)
Chris@4: {
Chris@4:     return unzOpenInternal(path, NULL, 1);
Chris@4: }
Chris@4: 
Chris@4: /*
Chris@4:   Close a ZipFile opened with unzipOpen.
Chris@4:   If there is files inside the .Zip opened with unzipOpenCurrentFile (see later),
Chris@4:     these files MUST be closed with unzipCloseCurrentFile before call unzipClose.
Chris@4:   return UNZ_OK if there is no problem. */
Chris@4: extern int ZEXPORT unzClose (unzFile file)
Chris@4: {
Chris@4:     unz64_s* s;
Chris@4:     if (file==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4: 
Chris@4:     if (s->pfile_in_zip_read!=NULL)
Chris@4:         unzCloseCurrentFile(file);
Chris@4: 
Chris@4:     ZCLOSE64(s->z_filefunc, s->filestream);
Chris@4:     TRYFREE(s);
Chris@4:     return UNZ_OK;
Chris@4: }
Chris@4: 
Chris@4: 
Chris@4: /*
Chris@4:   Write info about the ZipFile in the *pglobal_info structure.
Chris@4:   No preparation of the structure is needed
Chris@4:   return UNZ_OK if there is no problem. */
Chris@4: extern int ZEXPORT unzGetGlobalInfo64 (unzFile file, unz_global_info64* pglobal_info)
Chris@4: {
Chris@4:     unz64_s* s;
Chris@4:     if (file==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4:     *pglobal_info=s->gi;
Chris@4:     return UNZ_OK;
Chris@4: }
Chris@4: 
Chris@4: extern int ZEXPORT unzGetGlobalInfo (unzFile file, unz_global_info* pglobal_info32)
Chris@4: {
Chris@4:     unz64_s* s;
Chris@4:     if (file==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4:     /* to do : check if number_entry is not truncated */
Chris@4:     pglobal_info32->number_entry = (uLong)s->gi.number_entry;
Chris@4:     pglobal_info32->size_comment = s->gi.size_comment;
Chris@4:     return UNZ_OK;
Chris@4: }
Chris@4: /*
Chris@4:    Translate date/time from Dos format to tm_unz (readable more easilty)
Chris@4: */
Chris@4: local void unz64local_DosDateToTmuDate (ZPOS64_T ulDosDate, tm_unz* ptm)
Chris@4: {
Chris@4:     ZPOS64_T uDate;
Chris@4:     uDate = (ZPOS64_T)(ulDosDate>>16);
Chris@4:     ptm->tm_mday = (uInt)(uDate&0x1f) ;
Chris@4:     ptm->tm_mon =  (uInt)((((uDate)&0x1E0)/0x20)-1) ;
Chris@4:     ptm->tm_year = (uInt)(((uDate&0x0FE00)/0x0200)+1980) ;
Chris@4: 
Chris@4:     ptm->tm_hour = (uInt) ((ulDosDate &0xF800)/0x800);
Chris@4:     ptm->tm_min =  (uInt) ((ulDosDate&0x7E0)/0x20) ;
Chris@4:     ptm->tm_sec =  (uInt) (2*(ulDosDate&0x1f)) ;
Chris@4: }
Chris@4: 
Chris@4: /*
Chris@4:   Get Info about the current file in the zipfile, with internal only info
Chris@4: */
Chris@4: local int unz64local_GetCurrentFileInfoInternal OF((unzFile file,
Chris@4:                                                   unz_file_info64 *pfile_info,
Chris@4:                                                   unz_file_info64_internal
Chris@4:                                                   *pfile_info_internal,
Chris@4:                                                   char *szFileName,
Chris@4:                                                   uLong fileNameBufferSize,
Chris@4:                                                   void *extraField,
Chris@4:                                                   uLong extraFieldBufferSize,
Chris@4:                                                   char *szComment,
Chris@4:                                                   uLong commentBufferSize));
Chris@4: 
Chris@4: local int unz64local_GetCurrentFileInfoInternal (unzFile file,
Chris@4:                                                   unz_file_info64 *pfile_info,
Chris@4:                                                   unz_file_info64_internal
Chris@4:                                                   *pfile_info_internal,
Chris@4:                                                   char *szFileName,
Chris@4:                                                   uLong fileNameBufferSize,
Chris@4:                                                   void *extraField,
Chris@4:                                                   uLong extraFieldBufferSize,
Chris@4:                                                   char *szComment,
Chris@4:                                                   uLong commentBufferSize)
Chris@4: {
Chris@4:     unz64_s* s;
Chris@4:     unz_file_info64 file_info;
Chris@4:     unz_file_info64_internal file_info_internal;
Chris@4:     int err=UNZ_OK;
Chris@4:     uLong uMagic;
Chris@4:     long lSeek=0;
Chris@4:     uLong uL;
Chris@4: 
Chris@4:     if (file==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4:     if (ZSEEK64(s->z_filefunc, s->filestream,
Chris@4:               s->pos_in_central_dir+s->byte_before_the_zipfile,
Chris@4:               ZLIB_FILEFUNC_SEEK_SET)!=0)
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4: 
Chris@4:     /* we check the magic */
Chris@4:     if (err==UNZ_OK)
Chris@4:     {
Chris@4:         if (unz64local_getLong(&s->z_filefunc, s->filestream,&uMagic) != UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4:         else if (uMagic!=0x02014b50)
Chris@4:             err=UNZ_BADZIPFILE;
Chris@4:     }
Chris@4: 
Chris@4:     if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.version) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4:     if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.version_needed) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4:     if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.flag) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4:     if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.compression_method) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4:     if (unz64local_getLong(&s->z_filefunc, s->filestream,&file_info.dosDate) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4:     unz64local_DosDateToTmuDate(file_info.dosDate,&file_info.tmu_date);
Chris@4: 
Chris@4:     if (unz64local_getLong(&s->z_filefunc, s->filestream,&file_info.crc) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4:     if (unz64local_getLong(&s->z_filefunc, s->filestream,&uL) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4:     file_info.compressed_size = uL;
Chris@4: 
Chris@4:     if (unz64local_getLong(&s->z_filefunc, s->filestream,&uL) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4:     file_info.uncompressed_size = uL;
Chris@4: 
Chris@4:     if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.size_filename) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4:     if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_extra) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4:     if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_comment) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4:     if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.disk_num_start) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4:     if (unz64local_getShort(&s->z_filefunc, s->filestream,&file_info.internal_fa) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4:     if (unz64local_getLong(&s->z_filefunc, s->filestream,&file_info.external_fa) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4:                 // relative offset of local header
Chris@4:     if (unz64local_getLong(&s->z_filefunc, s->filestream,&uL) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4:     file_info_internal.offset_curfile = uL;
Chris@4: 
Chris@4:     lSeek+=file_info.size_filename;
Chris@4:     if ((err==UNZ_OK) && (szFileName!=NULL))
Chris@4:     {
Chris@4:         uLong uSizeRead ;
Chris@4:         if (file_info.size_filename<fileNameBufferSize)
Chris@4:         {
Chris@4:             *(szFileName+file_info.size_filename)='\0';
Chris@4:             uSizeRead = file_info.size_filename;
Chris@4:         }
Chris@4:         else
Chris@4:             uSizeRead = fileNameBufferSize;
Chris@4: 
Chris@4:         if ((file_info.size_filename>0) && (fileNameBufferSize>0))
Chris@4:             if (ZREAD64(s->z_filefunc, s->filestream,szFileName,uSizeRead)!=uSizeRead)
Chris@4:                 err=UNZ_ERRNO;
Chris@4:         lSeek -= uSizeRead;
Chris@4:     }
Chris@4: 
Chris@4:     // Read extrafield
Chris@4:     if ((err==UNZ_OK) && (extraField!=NULL))
Chris@4:     {
Chris@4:         ZPOS64_T uSizeRead ;
Chris@4:         if (file_info.size_file_extra<extraFieldBufferSize)
Chris@4:             uSizeRead = file_info.size_file_extra;
Chris@4:         else
Chris@4:             uSizeRead = extraFieldBufferSize;
Chris@4: 
Chris@4:         if (lSeek!=0)
Chris@4:         {
Chris@4:             if (ZSEEK64(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
Chris@4:                 lSeek=0;
Chris@4:             else
Chris@4:                 err=UNZ_ERRNO;
Chris@4:         }
Chris@4: 
Chris@4:         if ((file_info.size_file_extra>0) && (extraFieldBufferSize>0))
Chris@4:             if (ZREAD64(s->z_filefunc, s->filestream,extraField,(uLong)uSizeRead)!=uSizeRead)
Chris@4:                 err=UNZ_ERRNO;
Chris@4: 
Chris@4:         lSeek += file_info.size_file_extra - (uLong)uSizeRead;
Chris@4:     }
Chris@4:     else
Chris@4:         lSeek += file_info.size_file_extra;
Chris@4: 
Chris@4: 
Chris@4:     if ((err==UNZ_OK) && (file_info.size_file_extra != 0))
Chris@4:     {
Chris@4:                                 uLong acc = 0;
Chris@4: 
Chris@4:         // since lSeek now points to after the extra field we need to move back
Chris@4:         lSeek -= file_info.size_file_extra;
Chris@4: 
Chris@4:         if (lSeek!=0)
Chris@4:         {
Chris@4:             if (ZSEEK64(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
Chris@4:                 lSeek=0;
Chris@4:             else
Chris@4:                 err=UNZ_ERRNO;
Chris@4:         }
Chris@4: 
Chris@4:         while(acc < file_info.size_file_extra)
Chris@4:         {
Chris@4:             uLong headerId;
Chris@4:                                                 uLong dataSize;
Chris@4: 
Chris@4:             if (unz64local_getShort(&s->z_filefunc, s->filestream,&headerId) != UNZ_OK)
Chris@4:                 err=UNZ_ERRNO;
Chris@4: 
Chris@4:             if (unz64local_getShort(&s->z_filefunc, s->filestream,&dataSize) != UNZ_OK)
Chris@4:                 err=UNZ_ERRNO;
Chris@4: 
Chris@4:             /* ZIP64 extra fields */
Chris@4:             if (headerId == 0x0001)
Chris@4:             {
Chris@4:                                                         uLong uL;
Chris@4: 
Chris@4:                                                                 if(file_info.uncompressed_size == MAXU32)
Chris@4:                                                                 {
Chris@4:                                                                         if (unz64local_getLong64(&s->z_filefunc, s->filestream,&file_info.uncompressed_size) != UNZ_OK)
Chris@4:                                                                                         err=UNZ_ERRNO;
Chris@4:                                                                 }
Chris@4: 
Chris@4:                                                                 if(file_info.compressed_size == MAXU32)
Chris@4:                                                                 {
Chris@4:                                                                         if (unz64local_getLong64(&s->z_filefunc, s->filestream,&file_info.compressed_size) != UNZ_OK)
Chris@4:                                                                                   err=UNZ_ERRNO;
Chris@4:                                                                 }
Chris@4: 
Chris@4:                                                                 if(file_info_internal.offset_curfile == MAXU32)
Chris@4:                                                                 {
Chris@4:                                                                         /* Relative Header offset */
Chris@4:                                                                         if (unz64local_getLong64(&s->z_filefunc, s->filestream,&file_info_internal.offset_curfile) != UNZ_OK)
Chris@4:                                                                                 err=UNZ_ERRNO;
Chris@4:                                                                 }
Chris@4: 
Chris@4:                                                                 if(file_info.disk_num_start == MAXU32)
Chris@4:                                                                 {
Chris@4:                                                                         /* Disk Start Number */
Chris@4:                                                                         if (unz64local_getLong(&s->z_filefunc, s->filestream,&uL) != UNZ_OK)
Chris@4:                                                                                 err=UNZ_ERRNO;
Chris@4:                                                                 }
Chris@4: 
Chris@4:             }
Chris@4:             else
Chris@4:             {
Chris@4:                 if (ZSEEK64(s->z_filefunc, s->filestream,dataSize,ZLIB_FILEFUNC_SEEK_CUR)!=0)
Chris@4:                     err=UNZ_ERRNO;
Chris@4:             }
Chris@4: 
Chris@4:             acc += 2 + 2 + dataSize;
Chris@4:         }
Chris@4:     }
Chris@4: 
Chris@4:     if ((err==UNZ_OK) && (szComment!=NULL))
Chris@4:     {
Chris@4:         uLong uSizeRead ;
Chris@4:         if (file_info.size_file_comment<commentBufferSize)
Chris@4:         {
Chris@4:             *(szComment+file_info.size_file_comment)='\0';
Chris@4:             uSizeRead = file_info.size_file_comment;
Chris@4:         }
Chris@4:         else
Chris@4:             uSizeRead = commentBufferSize;
Chris@4: 
Chris@4:         if (lSeek!=0)
Chris@4:         {
Chris@4:             if (ZSEEK64(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0)
Chris@4:                 lSeek=0;
Chris@4:             else
Chris@4:                 err=UNZ_ERRNO;
Chris@4:         }
Chris@4: 
Chris@4:         if ((file_info.size_file_comment>0) && (commentBufferSize>0))
Chris@4:             if (ZREAD64(s->z_filefunc, s->filestream,szComment,uSizeRead)!=uSizeRead)
Chris@4:                 err=UNZ_ERRNO;
Chris@4:         lSeek+=file_info.size_file_comment - uSizeRead;
Chris@4:     }
Chris@4:     else
Chris@4:         lSeek+=file_info.size_file_comment;
Chris@4: 
Chris@4: 
Chris@4:     if ((err==UNZ_OK) && (pfile_info!=NULL))
Chris@4:         *pfile_info=file_info;
Chris@4: 
Chris@4:     if ((err==UNZ_OK) && (pfile_info_internal!=NULL))
Chris@4:         *pfile_info_internal=file_info_internal;
Chris@4: 
Chris@4:     return err;
Chris@4: }
Chris@4: 
Chris@4: 
Chris@4: 
Chris@4: /*
Chris@4:   Write info about the ZipFile in the *pglobal_info structure.
Chris@4:   No preparation of the structure is needed
Chris@4:   return UNZ_OK if there is no problem.
Chris@4: */
Chris@4: extern int ZEXPORT unzGetCurrentFileInfo64 (unzFile file,
Chris@4:                                           unz_file_info64 * pfile_info,
Chris@4:                                           char * szFileName, uLong fileNameBufferSize,
Chris@4:                                           void *extraField, uLong extraFieldBufferSize,
Chris@4:                                           char* szComment,  uLong commentBufferSize)
Chris@4: {
Chris@4:     return unz64local_GetCurrentFileInfoInternal(file,pfile_info,NULL,
Chris@4:                                                 szFileName,fileNameBufferSize,
Chris@4:                                                 extraField,extraFieldBufferSize,
Chris@4:                                                 szComment,commentBufferSize);
Chris@4: }
Chris@4: 
Chris@4: extern int ZEXPORT unzGetCurrentFileInfo (unzFile file,
Chris@4:                                           unz_file_info * pfile_info,
Chris@4:                                           char * szFileName, uLong fileNameBufferSize,
Chris@4:                                           void *extraField, uLong extraFieldBufferSize,
Chris@4:                                           char* szComment,  uLong commentBufferSize)
Chris@4: {
Chris@4:     int err;
Chris@4:     unz_file_info64 file_info64;
Chris@4:     err = unz64local_GetCurrentFileInfoInternal(file,&file_info64,NULL,
Chris@4:                                                 szFileName,fileNameBufferSize,
Chris@4:                                                 extraField,extraFieldBufferSize,
Chris@4:                                                 szComment,commentBufferSize);
Chris@4:     if ((err==UNZ_OK) && (pfile_info != NULL))
Chris@4:     {
Chris@4:         pfile_info->version = file_info64.version;
Chris@4:         pfile_info->version_needed = file_info64.version_needed;
Chris@4:         pfile_info->flag = file_info64.flag;
Chris@4:         pfile_info->compression_method = file_info64.compression_method;
Chris@4:         pfile_info->dosDate = file_info64.dosDate;
Chris@4:         pfile_info->crc = file_info64.crc;
Chris@4: 
Chris@4:         pfile_info->size_filename = file_info64.size_filename;
Chris@4:         pfile_info->size_file_extra = file_info64.size_file_extra;
Chris@4:         pfile_info->size_file_comment = file_info64.size_file_comment;
Chris@4: 
Chris@4:         pfile_info->disk_num_start = file_info64.disk_num_start;
Chris@4:         pfile_info->internal_fa = file_info64.internal_fa;
Chris@4:         pfile_info->external_fa = file_info64.external_fa;
Chris@4: 
Chris@4:         pfile_info->tmu_date = file_info64.tmu_date,
Chris@4: 
Chris@4: 
Chris@4:         pfile_info->compressed_size = (uLong)file_info64.compressed_size;
Chris@4:         pfile_info->uncompressed_size = (uLong)file_info64.uncompressed_size;
Chris@4: 
Chris@4:     }
Chris@4:     return err;
Chris@4: }
Chris@4: /*
Chris@4:   Set the current file of the zipfile to the first file.
Chris@4:   return UNZ_OK if there is no problem
Chris@4: */
Chris@4: extern int ZEXPORT unzGoToFirstFile (unzFile file)
Chris@4: {
Chris@4:     int err=UNZ_OK;
Chris@4:     unz64_s* s;
Chris@4:     if (file==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4:     s->pos_in_central_dir=s->offset_central_dir;
Chris@4:     s->num_file=0;
Chris@4:     err=unz64local_GetCurrentFileInfoInternal(file,&s->cur_file_info,
Chris@4:                                              &s->cur_file_info_internal,
Chris@4:                                              NULL,0,NULL,0,NULL,0);
Chris@4:     s->current_file_ok = (err == UNZ_OK);
Chris@4:     return err;
Chris@4: }
Chris@4: 
Chris@4: /*
Chris@4:   Set the current file of the zipfile to the next file.
Chris@4:   return UNZ_OK if there is no problem
Chris@4:   return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.
Chris@4: */
Chris@4: extern int ZEXPORT unzGoToNextFile (unzFile  file)
Chris@4: {
Chris@4:     unz64_s* s;
Chris@4:     int err;
Chris@4: 
Chris@4:     if (file==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4:     if (!s->current_file_ok)
Chris@4:         return UNZ_END_OF_LIST_OF_FILE;
Chris@4:     if (s->gi.number_entry != 0xffff)    /* 2^16 files overflow hack */
Chris@4:       if (s->num_file+1==s->gi.number_entry)
Chris@4:         return UNZ_END_OF_LIST_OF_FILE;
Chris@4: 
Chris@4:     s->pos_in_central_dir += SIZECENTRALDIRITEM + s->cur_file_info.size_filename +
Chris@4:             s->cur_file_info.size_file_extra + s->cur_file_info.size_file_comment ;
Chris@4:     s->num_file++;
Chris@4:     err = unz64local_GetCurrentFileInfoInternal(file,&s->cur_file_info,
Chris@4:                                                &s->cur_file_info_internal,
Chris@4:                                                NULL,0,NULL,0,NULL,0);
Chris@4:     s->current_file_ok = (err == UNZ_OK);
Chris@4:     return err;
Chris@4: }
Chris@4: 
Chris@4: 
Chris@4: /*
Chris@4:   Try locate the file szFileName in the zipfile.
Chris@4:   For the iCaseSensitivity signification, see unzipStringFileNameCompare
Chris@4: 
Chris@4:   return value :
Chris@4:   UNZ_OK if the file is found. It becomes the current file.
Chris@4:   UNZ_END_OF_LIST_OF_FILE if the file is not found
Chris@4: */
Chris@4: extern int ZEXPORT unzLocateFile (unzFile file, const char *szFileName, int iCaseSensitivity)
Chris@4: {
Chris@4:     unz64_s* s;
Chris@4:     int err;
Chris@4: 
Chris@4:     /* We remember the 'current' position in the file so that we can jump
Chris@4:      * back there if we fail.
Chris@4:      */
Chris@4:     unz_file_info64 cur_file_infoSaved;
Chris@4:     unz_file_info64_internal cur_file_info_internalSaved;
Chris@4:     ZPOS64_T num_fileSaved;
Chris@4:     ZPOS64_T pos_in_central_dirSaved;
Chris@4: 
Chris@4: 
Chris@4:     if (file==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4: 
Chris@4:     if (strlen(szFileName)>=UNZ_MAXFILENAMEINZIP)
Chris@4:         return UNZ_PARAMERROR;
Chris@4: 
Chris@4:     s=(unz64_s*)file;
Chris@4:     if (!s->current_file_ok)
Chris@4:         return UNZ_END_OF_LIST_OF_FILE;
Chris@4: 
Chris@4:     /* Save the current state */
Chris@4:     num_fileSaved = s->num_file;
Chris@4:     pos_in_central_dirSaved = s->pos_in_central_dir;
Chris@4:     cur_file_infoSaved = s->cur_file_info;
Chris@4:     cur_file_info_internalSaved = s->cur_file_info_internal;
Chris@4: 
Chris@4:     err = unzGoToFirstFile(file);
Chris@4: 
Chris@4:     while (err == UNZ_OK)
Chris@4:     {
Chris@4:         char szCurrentFileName[UNZ_MAXFILENAMEINZIP+1];
Chris@4:         err = unzGetCurrentFileInfo64(file,NULL,
Chris@4:                                     szCurrentFileName,sizeof(szCurrentFileName)-1,
Chris@4:                                     NULL,0,NULL,0);
Chris@4:         if (err == UNZ_OK)
Chris@4:         {
Chris@4:             if (unzStringFileNameCompare(szCurrentFileName,
Chris@4:                                             szFileName,iCaseSensitivity)==0)
Chris@4:                 return UNZ_OK;
Chris@4:             err = unzGoToNextFile(file);
Chris@4:         }
Chris@4:     }
Chris@4: 
Chris@4:     /* We failed, so restore the state of the 'current file' to where we
Chris@4:      * were.
Chris@4:      */
Chris@4:     s->num_file = num_fileSaved ;
Chris@4:     s->pos_in_central_dir = pos_in_central_dirSaved ;
Chris@4:     s->cur_file_info = cur_file_infoSaved;
Chris@4:     s->cur_file_info_internal = cur_file_info_internalSaved;
Chris@4:     return err;
Chris@4: }
Chris@4: 
Chris@4: 
Chris@4: /*
Chris@4: ///////////////////////////////////////////
Chris@4: // Contributed by Ryan Haksi (mailto://cryogen@infoserve.net)
Chris@4: // I need random access
Chris@4: //
Chris@4: // Further optimization could be realized by adding an ability
Chris@4: // to cache the directory in memory. The goal being a single
Chris@4: // comprehensive file read to put the file I need in a memory.
Chris@4: */
Chris@4: 
Chris@4: /*
Chris@4: typedef struct unz_file_pos_s
Chris@4: {
Chris@4:     ZPOS64_T pos_in_zip_directory;   // offset in file
Chris@4:     ZPOS64_T num_of_file;            // # of file
Chris@4: } unz_file_pos;
Chris@4: */
Chris@4: 
Chris@4: extern int ZEXPORT unzGetFilePos64(unzFile file, unz64_file_pos*  file_pos)
Chris@4: {
Chris@4:     unz64_s* s;
Chris@4: 
Chris@4:     if (file==NULL || file_pos==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4:     if (!s->current_file_ok)
Chris@4:         return UNZ_END_OF_LIST_OF_FILE;
Chris@4: 
Chris@4:     file_pos->pos_in_zip_directory  = s->pos_in_central_dir;
Chris@4:     file_pos->num_of_file           = s->num_file;
Chris@4: 
Chris@4:     return UNZ_OK;
Chris@4: }
Chris@4: 
Chris@4: extern int ZEXPORT unzGetFilePos(
Chris@4:     unzFile file,
Chris@4:     unz_file_pos* file_pos)
Chris@4: {
Chris@4:     unz64_file_pos file_pos64;
Chris@4:     int err = unzGetFilePos64(file,&file_pos64);
Chris@4:     if (err==UNZ_OK)
Chris@4:     {
Chris@4:         file_pos->pos_in_zip_directory = (uLong)file_pos64.pos_in_zip_directory;
Chris@4:         file_pos->num_of_file = (uLong)file_pos64.num_of_file;
Chris@4:     }
Chris@4:     return err;
Chris@4: }
Chris@4: 
Chris@4: extern int ZEXPORT unzGoToFilePos64(unzFile file, const unz64_file_pos* file_pos)
Chris@4: {
Chris@4:     unz64_s* s;
Chris@4:     int err;
Chris@4: 
Chris@4:     if (file==NULL || file_pos==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4: 
Chris@4:     /* jump to the right spot */
Chris@4:     s->pos_in_central_dir = file_pos->pos_in_zip_directory;
Chris@4:     s->num_file           = file_pos->num_of_file;
Chris@4: 
Chris@4:     /* set the current file */
Chris@4:     err = unz64local_GetCurrentFileInfoInternal(file,&s->cur_file_info,
Chris@4:                                                &s->cur_file_info_internal,
Chris@4:                                                NULL,0,NULL,0,NULL,0);
Chris@4:     /* return results */
Chris@4:     s->current_file_ok = (err == UNZ_OK);
Chris@4:     return err;
Chris@4: }
Chris@4: 
Chris@4: extern int ZEXPORT unzGoToFilePos(
Chris@4:     unzFile file,
Chris@4:     unz_file_pos* file_pos)
Chris@4: {
Chris@4:     unz64_file_pos file_pos64;
Chris@4:     if (file_pos == NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4: 
Chris@4:     file_pos64.pos_in_zip_directory = file_pos->pos_in_zip_directory;
Chris@4:     file_pos64.num_of_file = file_pos->num_of_file;
Chris@4:     return unzGoToFilePos64(file,&file_pos64);
Chris@4: }
Chris@4: 
Chris@4: /*
Chris@4: // Unzip Helper Functions - should be here?
Chris@4: ///////////////////////////////////////////
Chris@4: */
Chris@4: 
Chris@4: /*
Chris@4:   Read the local header of the current zipfile
Chris@4:   Check the coherency of the local header and info in the end of central
Chris@4:         directory about this file
Chris@4:   store in *piSizeVar the size of extra info in local header
Chris@4:         (filename and size of extra field data)
Chris@4: */
Chris@4: local int unz64local_CheckCurrentFileCoherencyHeader (unz64_s* s, uInt* piSizeVar,
Chris@4:                                                     ZPOS64_T * poffset_local_extrafield,
Chris@4:                                                     uInt  * psize_local_extrafield)
Chris@4: {
Chris@4:     uLong uMagic,uData,uFlags;
Chris@4:     uLong size_filename;
Chris@4:     uLong size_extra_field;
Chris@4:     int err=UNZ_OK;
Chris@4: 
Chris@4:     *piSizeVar = 0;
Chris@4:     *poffset_local_extrafield = 0;
Chris@4:     *psize_local_extrafield = 0;
Chris@4: 
Chris@4:     if (ZSEEK64(s->z_filefunc, s->filestream,s->cur_file_info_internal.offset_curfile +
Chris@4:                                 s->byte_before_the_zipfile,ZLIB_FILEFUNC_SEEK_SET)!=0)
Chris@4:         return UNZ_ERRNO;
Chris@4: 
Chris@4: 
Chris@4:     if (err==UNZ_OK)
Chris@4:     {
Chris@4:         if (unz64local_getLong(&s->z_filefunc, s->filestream,&uMagic) != UNZ_OK)
Chris@4:             err=UNZ_ERRNO;
Chris@4:         else if (uMagic!=0x04034b50)
Chris@4:             err=UNZ_BADZIPFILE;
Chris@4:     }
Chris@4: 
Chris@4:     if (unz64local_getShort(&s->z_filefunc, s->filestream,&uData) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4: /*
Chris@4:     else if ((err==UNZ_OK) && (uData!=s->cur_file_info.wVersion))
Chris@4:         err=UNZ_BADZIPFILE;
Chris@4: */
Chris@4:     if (unz64local_getShort(&s->z_filefunc, s->filestream,&uFlags) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4:     if (unz64local_getShort(&s->z_filefunc, s->filestream,&uData) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4:     else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compression_method))
Chris@4:         err=UNZ_BADZIPFILE;
Chris@4: 
Chris@4:     if ((err==UNZ_OK) && (s->cur_file_info.compression_method!=0) &&
Chris@4: /* #ifdef HAVE_BZIP2 */
Chris@4:                          (s->cur_file_info.compression_method!=Z_BZIP2ED) &&
Chris@4: /* #endif */
Chris@4:                          (s->cur_file_info.compression_method!=Z_DEFLATED))
Chris@4:         err=UNZ_BADZIPFILE;
Chris@4: 
Chris@4:     if (unz64local_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* date/time */
Chris@4:         err=UNZ_ERRNO;
Chris@4: 
Chris@4:     if (unz64local_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* crc */
Chris@4:         err=UNZ_ERRNO;
Chris@4:     else if ((err==UNZ_OK) && (uData!=s->cur_file_info.crc) && ((uFlags & 8)==0))
Chris@4:         err=UNZ_BADZIPFILE;
Chris@4: 
Chris@4:     if (unz64local_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* size compr */
Chris@4:         err=UNZ_ERRNO;
Chris@4:     else if (uData != 0xFFFFFFFF && (err==UNZ_OK) && (uData!=s->cur_file_info.compressed_size) && ((uFlags & 8)==0))
Chris@4:         err=UNZ_BADZIPFILE;
Chris@4: 
Chris@4:     if (unz64local_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* size uncompr */
Chris@4:         err=UNZ_ERRNO;
Chris@4:     else if (uData != 0xFFFFFFFF && (err==UNZ_OK) && (uData!=s->cur_file_info.uncompressed_size) && ((uFlags & 8)==0))
Chris@4:         err=UNZ_BADZIPFILE;
Chris@4: 
Chris@4:     if (unz64local_getShort(&s->z_filefunc, s->filestream,&size_filename) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4:     else if ((err==UNZ_OK) && (size_filename!=s->cur_file_info.size_filename))
Chris@4:         err=UNZ_BADZIPFILE;
Chris@4: 
Chris@4:     *piSizeVar += (uInt)size_filename;
Chris@4: 
Chris@4:     if (unz64local_getShort(&s->z_filefunc, s->filestream,&size_extra_field) != UNZ_OK)
Chris@4:         err=UNZ_ERRNO;
Chris@4:     *poffset_local_extrafield= s->cur_file_info_internal.offset_curfile +
Chris@4:                                     SIZEZIPLOCALHEADER + size_filename;
Chris@4:     *psize_local_extrafield = (uInt)size_extra_field;
Chris@4: 
Chris@4:     *piSizeVar += (uInt)size_extra_field;
Chris@4: 
Chris@4:     return err;
Chris@4: }
Chris@4: 
Chris@4: /*
Chris@4:   Open for reading data the current file in the zipfile.
Chris@4:   If there is no error and the file is opened, the return value is UNZ_OK.
Chris@4: */
Chris@4: extern int ZEXPORT unzOpenCurrentFile3 (unzFile file, int* method,
Chris@4:                                             int* level, int raw, const char* password)
Chris@4: {
Chris@4:     int err=UNZ_OK;
Chris@4:     uInt iSizeVar;
Chris@4:     unz64_s* s;
Chris@4:     file_in_zip64_read_info_s* pfile_in_zip_read_info;
Chris@4:     ZPOS64_T offset_local_extrafield;  /* offset of the local extra field */
Chris@4:     uInt  size_local_extrafield;    /* size of the local extra field */
Chris@4: #    ifndef NOUNCRYPT
Chris@4:     char source[12];
Chris@4: #    else
Chris@4:     if (password != NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4: #    endif
Chris@4: 
Chris@4:     if (file==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4:     if (!s->current_file_ok)
Chris@4:         return UNZ_PARAMERROR;
Chris@4: 
Chris@4:     if (s->pfile_in_zip_read != NULL)
Chris@4:         unzCloseCurrentFile(file);
Chris@4: 
Chris@4:     if (unz64local_CheckCurrentFileCoherencyHeader(s,&iSizeVar, &offset_local_extrafield,&size_local_extrafield)!=UNZ_OK)
Chris@4:         return UNZ_BADZIPFILE;
Chris@4: 
Chris@4:     pfile_in_zip_read_info = (file_in_zip64_read_info_s*)ALLOC(sizeof(file_in_zip64_read_info_s));
Chris@4:     if (pfile_in_zip_read_info==NULL)
Chris@4:         return UNZ_INTERNALERROR;
Chris@4: 
Chris@4:     pfile_in_zip_read_info->read_buffer=(char*)ALLOC(UNZ_BUFSIZE);
Chris@4:     pfile_in_zip_read_info->offset_local_extrafield = offset_local_extrafield;
Chris@4:     pfile_in_zip_read_info->size_local_extrafield = size_local_extrafield;
Chris@4:     pfile_in_zip_read_info->pos_local_extrafield=0;
Chris@4:     pfile_in_zip_read_info->raw=raw;
Chris@4: 
Chris@4:     if (pfile_in_zip_read_info->read_buffer==NULL)
Chris@4:     {
Chris@4:         TRYFREE(pfile_in_zip_read_info);
Chris@4:         return UNZ_INTERNALERROR;
Chris@4:     }
Chris@4: 
Chris@4:     pfile_in_zip_read_info->stream_initialised=0;
Chris@4: 
Chris@4:     if (method!=NULL)
Chris@4:         *method = (int)s->cur_file_info.compression_method;
Chris@4: 
Chris@4:     if (level!=NULL)
Chris@4:     {
Chris@4:         *level = 6;
Chris@4:         switch (s->cur_file_info.flag & 0x06)
Chris@4:         {
Chris@4:           case 6 : *level = 1; break;
Chris@4:           case 4 : *level = 2; break;
Chris@4:           case 2 : *level = 9; break;
Chris@4:         }
Chris@4:     }
Chris@4: 
Chris@4:     if ((s->cur_file_info.compression_method!=0) &&
Chris@4: /* #ifdef HAVE_BZIP2 */
Chris@4:         (s->cur_file_info.compression_method!=Z_BZIP2ED) &&
Chris@4: /* #endif */
Chris@4:         (s->cur_file_info.compression_method!=Z_DEFLATED))
Chris@4: 
Chris@4:         err=UNZ_BADZIPFILE;
Chris@4: 
Chris@4:     pfile_in_zip_read_info->crc32_wait=s->cur_file_info.crc;
Chris@4:     pfile_in_zip_read_info->crc32=0;
Chris@4:     pfile_in_zip_read_info->total_out_64=0;
Chris@4:     pfile_in_zip_read_info->compression_method = s->cur_file_info.compression_method;
Chris@4:     pfile_in_zip_read_info->filestream=s->filestream;
Chris@4:     pfile_in_zip_read_info->z_filefunc=s->z_filefunc;
Chris@4:     pfile_in_zip_read_info->byte_before_the_zipfile=s->byte_before_the_zipfile;
Chris@4: 
Chris@4:     pfile_in_zip_read_info->stream.total_out = 0;
Chris@4: 
Chris@4:     if ((s->cur_file_info.compression_method==Z_BZIP2ED) && (!raw))
Chris@4:     {
Chris@4: #ifdef HAVE_BZIP2
Chris@4:       pfile_in_zip_read_info->bstream.bzalloc = (void *(*) (void *, int, int))0;
Chris@4:       pfile_in_zip_read_info->bstream.bzfree = (free_func)0;
Chris@4:       pfile_in_zip_read_info->bstream.opaque = (voidpf)0;
Chris@4:       pfile_in_zip_read_info->bstream.state = (voidpf)0;
Chris@4: 
Chris@4:       pfile_in_zip_read_info->stream.zalloc = (alloc_func)0;
Chris@4:       pfile_in_zip_read_info->stream.zfree = (free_func)0;
Chris@4:       pfile_in_zip_read_info->stream.opaque = (voidpf)0;
Chris@4:       pfile_in_zip_read_info->stream.next_in = (voidpf)0;
Chris@4:       pfile_in_zip_read_info->stream.avail_in = 0;
Chris@4: 
Chris@4:       err=BZ2_bzDecompressInit(&pfile_in_zip_read_info->bstream, 0, 0);
Chris@4:       if (err == Z_OK)
Chris@4:         pfile_in_zip_read_info->stream_initialised=Z_BZIP2ED;
Chris@4:       else
Chris@4:       {
Chris@4:         TRYFREE(pfile_in_zip_read_info);
Chris@4:         return err;
Chris@4:       }
Chris@4: #else
Chris@4:       pfile_in_zip_read_info->raw=1;
Chris@4: #endif
Chris@4:     }
Chris@4:     else if ((s->cur_file_info.compression_method==Z_DEFLATED) && (!raw))
Chris@4:     {
Chris@4:       pfile_in_zip_read_info->stream.zalloc = (alloc_func)0;
Chris@4:       pfile_in_zip_read_info->stream.zfree = (free_func)0;
Chris@4:       pfile_in_zip_read_info->stream.opaque = (voidpf)0;
Chris@4:       pfile_in_zip_read_info->stream.next_in = 0;
Chris@4:       pfile_in_zip_read_info->stream.avail_in = 0;
Chris@4: 
Chris@4:       err=inflateInit2(&pfile_in_zip_read_info->stream, -MAX_WBITS);
Chris@4:       if (err == Z_OK)
Chris@4:         pfile_in_zip_read_info->stream_initialised=Z_DEFLATED;
Chris@4:       else
Chris@4:       {
Chris@4:         TRYFREE(pfile_in_zip_read_info);
Chris@4:         return err;
Chris@4:       }
Chris@4:         /* windowBits is passed < 0 to tell that there is no zlib header.
Chris@4:          * Note that in this case inflate *requires* an extra "dummy" byte
Chris@4:          * after the compressed stream in order to complete decompression and
Chris@4:          * return Z_STREAM_END.
Chris@4:          * In unzip, i don't wait absolutely Z_STREAM_END because I known the
Chris@4:          * size of both compressed and uncompressed data
Chris@4:          */
Chris@4:     }
Chris@4:     pfile_in_zip_read_info->rest_read_compressed =
Chris@4:             s->cur_file_info.compressed_size ;
Chris@4:     pfile_in_zip_read_info->rest_read_uncompressed =
Chris@4:             s->cur_file_info.uncompressed_size ;
Chris@4: 
Chris@4: 
Chris@4:     pfile_in_zip_read_info->pos_in_zipfile =
Chris@4:             s->cur_file_info_internal.offset_curfile + SIZEZIPLOCALHEADER +
Chris@4:               iSizeVar;
Chris@4: 
Chris@4:     pfile_in_zip_read_info->stream.avail_in = (uInt)0;
Chris@4: 
Chris@4:     s->pfile_in_zip_read = pfile_in_zip_read_info;
Chris@4:                 s->encrypted = 0;
Chris@4: 
Chris@4: #    ifndef NOUNCRYPT
Chris@4:     if (password != NULL)
Chris@4:     {
Chris@4:         int i;
Chris@4:         s->pcrc_32_tab = get_crc_table();
Chris@4:         init_keys(password,s->keys,s->pcrc_32_tab);
Chris@4:         if (ZSEEK64(s->z_filefunc, s->filestream,
Chris@4:                   s->pfile_in_zip_read->pos_in_zipfile +
Chris@4:                      s->pfile_in_zip_read->byte_before_the_zipfile,
Chris@4:                   SEEK_SET)!=0)
Chris@4:             return UNZ_INTERNALERROR;
Chris@4:         if(ZREAD64(s->z_filefunc, s->filestream,source, 12)<12)
Chris@4:             return UNZ_INTERNALERROR;
Chris@4: 
Chris@4:         for (i = 0; i<12; i++)
Chris@4:             zdecode(s->keys,s->pcrc_32_tab,source[i]);
Chris@4: 
Chris@4:         s->pfile_in_zip_read->pos_in_zipfile+=12;
Chris@4:         s->encrypted=1;
Chris@4:     }
Chris@4: #    endif
Chris@4: 
Chris@4: 
Chris@4:     return UNZ_OK;
Chris@4: }
Chris@4: 
Chris@4: extern int ZEXPORT unzOpenCurrentFile (unzFile file)
Chris@4: {
Chris@4:     return unzOpenCurrentFile3(file, NULL, NULL, 0, NULL);
Chris@4: }
Chris@4: 
Chris@4: extern int ZEXPORT unzOpenCurrentFilePassword (unzFile file, const char*  password)
Chris@4: {
Chris@4:     return unzOpenCurrentFile3(file, NULL, NULL, 0, password);
Chris@4: }
Chris@4: 
Chris@4: extern int ZEXPORT unzOpenCurrentFile2 (unzFile file, int* method, int* level, int raw)
Chris@4: {
Chris@4:     return unzOpenCurrentFile3(file, method, level, raw, NULL);
Chris@4: }
Chris@4: 
Chris@4: /** Addition for GDAL : START */
Chris@4: 
Chris@4: extern ZPOS64_T ZEXPORT unzGetCurrentFileZStreamPos64( unzFile file)
Chris@4: {
Chris@4:     unz64_s* s;
Chris@4:     file_in_zip64_read_info_s* pfile_in_zip_read_info;
Chris@4:     s=(unz64_s*)file;
Chris@4:     if (file==NULL)
Chris@4:         return 0; //UNZ_PARAMERROR;
Chris@4:     pfile_in_zip_read_info=s->pfile_in_zip_read;
Chris@4:     if (pfile_in_zip_read_info==NULL)
Chris@4:         return 0; //UNZ_PARAMERROR;
Chris@4:     return pfile_in_zip_read_info->pos_in_zipfile +
Chris@4:                          pfile_in_zip_read_info->byte_before_the_zipfile;
Chris@4: }
Chris@4: 
Chris@4: /** Addition for GDAL : END */
Chris@4: 
Chris@4: /*
Chris@4:   Read bytes from the current file.
Chris@4:   buf contain buffer where data must be copied
Chris@4:   len the size of buf.
Chris@4: 
Chris@4:   return the number of byte copied if somes bytes are copied
Chris@4:   return 0 if the end of file was reached
Chris@4:   return <0 with error code if there is an error
Chris@4:     (UNZ_ERRNO for IO error, or zLib error for uncompress error)
Chris@4: */
Chris@4: extern int ZEXPORT unzReadCurrentFile  (unzFile file, voidp buf, unsigned len)
Chris@4: {
Chris@4:     int err=UNZ_OK;
Chris@4:     uInt iRead = 0;
Chris@4:     unz64_s* s;
Chris@4:     file_in_zip64_read_info_s* pfile_in_zip_read_info;
Chris@4:     if (file==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4:     pfile_in_zip_read_info=s->pfile_in_zip_read;
Chris@4: 
Chris@4:     if (pfile_in_zip_read_info==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4: 
Chris@4: 
Chris@4:     if (pfile_in_zip_read_info->read_buffer == NULL)
Chris@4:         return UNZ_END_OF_LIST_OF_FILE;
Chris@4:     if (len==0)
Chris@4:         return 0;
Chris@4: 
Chris@4:     pfile_in_zip_read_info->stream.next_out = (Bytef*)buf;
Chris@4: 
Chris@4:     pfile_in_zip_read_info->stream.avail_out = (uInt)len;
Chris@4: 
Chris@4:     if ((len>pfile_in_zip_read_info->rest_read_uncompressed) &&
Chris@4:         (!(pfile_in_zip_read_info->raw)))
Chris@4:         pfile_in_zip_read_info->stream.avail_out =
Chris@4:             (uInt)pfile_in_zip_read_info->rest_read_uncompressed;
Chris@4: 
Chris@4:     if ((len>pfile_in_zip_read_info->rest_read_compressed+
Chris@4:            pfile_in_zip_read_info->stream.avail_in) &&
Chris@4:          (pfile_in_zip_read_info->raw))
Chris@4:         pfile_in_zip_read_info->stream.avail_out =
Chris@4:             (uInt)pfile_in_zip_read_info->rest_read_compressed+
Chris@4:             pfile_in_zip_read_info->stream.avail_in;
Chris@4: 
Chris@4:     while (pfile_in_zip_read_info->stream.avail_out>0)
Chris@4:     {
Chris@4:         if ((pfile_in_zip_read_info->stream.avail_in==0) &&
Chris@4:             (pfile_in_zip_read_info->rest_read_compressed>0))
Chris@4:         {
Chris@4:             uInt uReadThis = UNZ_BUFSIZE;
Chris@4:             if (pfile_in_zip_read_info->rest_read_compressed<uReadThis)
Chris@4:                 uReadThis = (uInt)pfile_in_zip_read_info->rest_read_compressed;
Chris@4:             if (uReadThis == 0)
Chris@4:                 return UNZ_EOF;
Chris@4:             if (ZSEEK64(pfile_in_zip_read_info->z_filefunc,
Chris@4:                       pfile_in_zip_read_info->filestream,
Chris@4:                       pfile_in_zip_read_info->pos_in_zipfile +
Chris@4:                          pfile_in_zip_read_info->byte_before_the_zipfile,
Chris@4:                          ZLIB_FILEFUNC_SEEK_SET)!=0)
Chris@4:                 return UNZ_ERRNO;
Chris@4:             if (ZREAD64(pfile_in_zip_read_info->z_filefunc,
Chris@4:                       pfile_in_zip_read_info->filestream,
Chris@4:                       pfile_in_zip_read_info->read_buffer,
Chris@4:                       uReadThis)!=uReadThis)
Chris@4:                 return UNZ_ERRNO;
Chris@4: 
Chris@4: 
Chris@4: #            ifndef NOUNCRYPT
Chris@4:             if(s->encrypted)
Chris@4:             {
Chris@4:                 uInt i;
Chris@4:                 for(i=0;i<uReadThis;i++)
Chris@4:                   pfile_in_zip_read_info->read_buffer[i] =
Chris@4:                       zdecode(s->keys,s->pcrc_32_tab,
Chris@4:                               pfile_in_zip_read_info->read_buffer[i]);
Chris@4:             }
Chris@4: #            endif
Chris@4: 
Chris@4: 
Chris@4:             pfile_in_zip_read_info->pos_in_zipfile += uReadThis;
Chris@4: 
Chris@4:             pfile_in_zip_read_info->rest_read_compressed-=uReadThis;
Chris@4: 
Chris@4:             pfile_in_zip_read_info->stream.next_in =
Chris@4:                 (Bytef*)pfile_in_zip_read_info->read_buffer;
Chris@4:             pfile_in_zip_read_info->stream.avail_in = (uInt)uReadThis;
Chris@4:         }
Chris@4: 
Chris@4:         if ((pfile_in_zip_read_info->compression_method==0) || (pfile_in_zip_read_info->raw))
Chris@4:         {
Chris@4:             uInt uDoCopy,i ;
Chris@4: 
Chris@4:             if ((pfile_in_zip_read_info->stream.avail_in == 0) &&
Chris@4:                 (pfile_in_zip_read_info->rest_read_compressed == 0))
Chris@4:                 return (iRead==0) ? UNZ_EOF : iRead;
Chris@4: 
Chris@4:             if (pfile_in_zip_read_info->stream.avail_out <
Chris@4:                             pfile_in_zip_read_info->stream.avail_in)
Chris@4:                 uDoCopy = pfile_in_zip_read_info->stream.avail_out ;
Chris@4:             else
Chris@4:                 uDoCopy = pfile_in_zip_read_info->stream.avail_in ;
Chris@4: 
Chris@4:             for (i=0;i<uDoCopy;i++)
Chris@4:                 *(pfile_in_zip_read_info->stream.next_out+i) =
Chris@4:                         *(pfile_in_zip_read_info->stream.next_in+i);
Chris@4: 
Chris@4:             pfile_in_zip_read_info->total_out_64 = pfile_in_zip_read_info->total_out_64 + uDoCopy;
Chris@4: 
Chris@4:             pfile_in_zip_read_info->crc32 = crc32(pfile_in_zip_read_info->crc32,
Chris@4:                                 pfile_in_zip_read_info->stream.next_out,
Chris@4:                                 uDoCopy);
Chris@4:             pfile_in_zip_read_info->rest_read_uncompressed-=uDoCopy;
Chris@4:             pfile_in_zip_read_info->stream.avail_in -= uDoCopy;
Chris@4:             pfile_in_zip_read_info->stream.avail_out -= uDoCopy;
Chris@4:             pfile_in_zip_read_info->stream.next_out += uDoCopy;
Chris@4:             pfile_in_zip_read_info->stream.next_in += uDoCopy;
Chris@4:             pfile_in_zip_read_info->stream.total_out += uDoCopy;
Chris@4:             iRead += uDoCopy;
Chris@4:         }
Chris@4:         else if (pfile_in_zip_read_info->compression_method==Z_BZIP2ED)
Chris@4:         {
Chris@4: #ifdef HAVE_BZIP2
Chris@4:             uLong uTotalOutBefore,uTotalOutAfter;
Chris@4:             const Bytef *bufBefore;
Chris@4:             uLong uOutThis;
Chris@4: 
Chris@4:             pfile_in_zip_read_info->bstream.next_in        = (char*)pfile_in_zip_read_info->stream.next_in;
Chris@4:             pfile_in_zip_read_info->bstream.avail_in       = pfile_in_zip_read_info->stream.avail_in;
Chris@4:             pfile_in_zip_read_info->bstream.total_in_lo32  = pfile_in_zip_read_info->stream.total_in;
Chris@4:             pfile_in_zip_read_info->bstream.total_in_hi32  = 0;
Chris@4:             pfile_in_zip_read_info->bstream.next_out       = (char*)pfile_in_zip_read_info->stream.next_out;
Chris@4:             pfile_in_zip_read_info->bstream.avail_out      = pfile_in_zip_read_info->stream.avail_out;
Chris@4:             pfile_in_zip_read_info->bstream.total_out_lo32 = pfile_in_zip_read_info->stream.total_out;
Chris@4:             pfile_in_zip_read_info->bstream.total_out_hi32 = 0;
Chris@4: 
Chris@4:             uTotalOutBefore = pfile_in_zip_read_info->bstream.total_out_lo32;
Chris@4:             bufBefore = (const Bytef *)pfile_in_zip_read_info->bstream.next_out;
Chris@4: 
Chris@4:             err=BZ2_bzDecompress(&pfile_in_zip_read_info->bstream);
Chris@4: 
Chris@4:             uTotalOutAfter = pfile_in_zip_read_info->bstream.total_out_lo32;
Chris@4:             uOutThis = uTotalOutAfter-uTotalOutBefore;
Chris@4: 
Chris@4:             pfile_in_zip_read_info->total_out_64 = pfile_in_zip_read_info->total_out_64 + uOutThis;
Chris@4: 
Chris@4:             pfile_in_zip_read_info->crc32 = crc32(pfile_in_zip_read_info->crc32,bufBefore, (uInt)(uOutThis));
Chris@4:             pfile_in_zip_read_info->rest_read_uncompressed -= uOutThis;
Chris@4:             iRead += (uInt)(uTotalOutAfter - uTotalOutBefore);
Chris@4: 
Chris@4:             pfile_in_zip_read_info->stream.next_in   = (Bytef*)pfile_in_zip_read_info->bstream.next_in;
Chris@4:             pfile_in_zip_read_info->stream.avail_in  = pfile_in_zip_read_info->bstream.avail_in;
Chris@4:             pfile_in_zip_read_info->stream.total_in  = pfile_in_zip_read_info->bstream.total_in_lo32;
Chris@4:             pfile_in_zip_read_info->stream.next_out  = (Bytef*)pfile_in_zip_read_info->bstream.next_out;
Chris@4:             pfile_in_zip_read_info->stream.avail_out = pfile_in_zip_read_info->bstream.avail_out;
Chris@4:             pfile_in_zip_read_info->stream.total_out = pfile_in_zip_read_info->bstream.total_out_lo32;
Chris@4: 
Chris@4:             if (err==BZ_STREAM_END)
Chris@4:               return (iRead==0) ? UNZ_EOF : iRead;
Chris@4:             if (err!=BZ_OK)
Chris@4:               break;
Chris@4: #endif
Chris@4:         } // end Z_BZIP2ED
Chris@4:         else
Chris@4:         {
Chris@4:             ZPOS64_T uTotalOutBefore,uTotalOutAfter;
Chris@4:             const Bytef *bufBefore;
Chris@4:             ZPOS64_T uOutThis;
Chris@4:             int flush=Z_SYNC_FLUSH;
Chris@4: 
Chris@4:             uTotalOutBefore = pfile_in_zip_read_info->stream.total_out;
Chris@4:             bufBefore = pfile_in_zip_read_info->stream.next_out;
Chris@4: 
Chris@4:             /*
Chris@4:             if ((pfile_in_zip_read_info->rest_read_uncompressed ==
Chris@4:                      pfile_in_zip_read_info->stream.avail_out) &&
Chris@4:                 (pfile_in_zip_read_info->rest_read_compressed == 0))
Chris@4:                 flush = Z_FINISH;
Chris@4:             */
Chris@4:             err=inflate(&pfile_in_zip_read_info->stream,flush);
Chris@4: 
Chris@4:             if ((err>=0) && (pfile_in_zip_read_info->stream.msg!=NULL))
Chris@4:               err = Z_DATA_ERROR;
Chris@4: 
Chris@4:             uTotalOutAfter = pfile_in_zip_read_info->stream.total_out;
Chris@4:             uOutThis = uTotalOutAfter-uTotalOutBefore;
Chris@4: 
Chris@4:             pfile_in_zip_read_info->total_out_64 = pfile_in_zip_read_info->total_out_64 + uOutThis;
Chris@4: 
Chris@4:             pfile_in_zip_read_info->crc32 =
Chris@4:                 crc32(pfile_in_zip_read_info->crc32,bufBefore,
Chris@4:                         (uInt)(uOutThis));
Chris@4: 
Chris@4:             pfile_in_zip_read_info->rest_read_uncompressed -=
Chris@4:                 uOutThis;
Chris@4: 
Chris@4:             iRead += (uInt)(uTotalOutAfter - uTotalOutBefore);
Chris@4: 
Chris@4:             if (err==Z_STREAM_END)
Chris@4:                 return (iRead==0) ? UNZ_EOF : iRead;
Chris@4:             if (err!=Z_OK)
Chris@4:                 break;
Chris@4:         }
Chris@4:     }
Chris@4: 
Chris@4:     if (err==Z_OK)
Chris@4:         return iRead;
Chris@4:     return err;
Chris@4: }
Chris@4: 
Chris@4: 
Chris@4: /*
Chris@4:   Give the current position in uncompressed data
Chris@4: */
Chris@4: extern z_off_t ZEXPORT unztell (unzFile file)
Chris@4: {
Chris@4:     unz64_s* s;
Chris@4:     file_in_zip64_read_info_s* pfile_in_zip_read_info;
Chris@4:     if (file==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4:     pfile_in_zip_read_info=s->pfile_in_zip_read;
Chris@4: 
Chris@4:     if (pfile_in_zip_read_info==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4: 
Chris@4:     return (z_off_t)pfile_in_zip_read_info->stream.total_out;
Chris@4: }
Chris@4: 
Chris@4: extern ZPOS64_T ZEXPORT unztell64 (unzFile file)
Chris@4: {
Chris@4: 
Chris@4:     unz64_s* s;
Chris@4:     file_in_zip64_read_info_s* pfile_in_zip_read_info;
Chris@4:     if (file==NULL)
Chris@4:         return (ZPOS64_T)-1;
Chris@4:     s=(unz64_s*)file;
Chris@4:     pfile_in_zip_read_info=s->pfile_in_zip_read;
Chris@4: 
Chris@4:     if (pfile_in_zip_read_info==NULL)
Chris@4:         return (ZPOS64_T)-1;
Chris@4: 
Chris@4:     return pfile_in_zip_read_info->total_out_64;
Chris@4: }
Chris@4: 
Chris@4: 
Chris@4: /*
Chris@4:   return 1 if the end of file was reached, 0 elsewhere
Chris@4: */
Chris@4: extern int ZEXPORT unzeof (unzFile file)
Chris@4: {
Chris@4:     unz64_s* s;
Chris@4:     file_in_zip64_read_info_s* pfile_in_zip_read_info;
Chris@4:     if (file==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4:     pfile_in_zip_read_info=s->pfile_in_zip_read;
Chris@4: 
Chris@4:     if (pfile_in_zip_read_info==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4: 
Chris@4:     if (pfile_in_zip_read_info->rest_read_uncompressed == 0)
Chris@4:         return 1;
Chris@4:     else
Chris@4:         return 0;
Chris@4: }
Chris@4: 
Chris@4: 
Chris@4: 
Chris@4: /*
Chris@4: Read extra field from the current file (opened by unzOpenCurrentFile)
Chris@4: This is the local-header version of the extra field (sometimes, there is
Chris@4: more info in the local-header version than in the central-header)
Chris@4: 
Chris@4:   if buf==NULL, it return the size of the local extra field that can be read
Chris@4: 
Chris@4:   if buf!=NULL, len is the size of the buffer, the extra header is copied in
Chris@4:     buf.
Chris@4:   the return value is the number of bytes copied in buf, or (if <0)
Chris@4:     the error code
Chris@4: */
Chris@4: extern int ZEXPORT unzGetLocalExtrafield (unzFile file, voidp buf, unsigned len)
Chris@4: {
Chris@4:     unz64_s* s;
Chris@4:     file_in_zip64_read_info_s* pfile_in_zip_read_info;
Chris@4:     uInt read_now;
Chris@4:     ZPOS64_T size_to_read;
Chris@4: 
Chris@4:     if (file==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4:     pfile_in_zip_read_info=s->pfile_in_zip_read;
Chris@4: 
Chris@4:     if (pfile_in_zip_read_info==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4: 
Chris@4:     size_to_read = (pfile_in_zip_read_info->size_local_extrafield -
Chris@4:                 pfile_in_zip_read_info->pos_local_extrafield);
Chris@4: 
Chris@4:     if (buf==NULL)
Chris@4:         return (int)size_to_read;
Chris@4: 
Chris@4:     if (len>size_to_read)
Chris@4:         read_now = (uInt)size_to_read;
Chris@4:     else
Chris@4:         read_now = (uInt)len ;
Chris@4: 
Chris@4:     if (read_now==0)
Chris@4:         return 0;
Chris@4: 
Chris@4:     if (ZSEEK64(pfile_in_zip_read_info->z_filefunc,
Chris@4:               pfile_in_zip_read_info->filestream,
Chris@4:               pfile_in_zip_read_info->offset_local_extrafield +
Chris@4:               pfile_in_zip_read_info->pos_local_extrafield,
Chris@4:               ZLIB_FILEFUNC_SEEK_SET)!=0)
Chris@4:         return UNZ_ERRNO;
Chris@4: 
Chris@4:     if (ZREAD64(pfile_in_zip_read_info->z_filefunc,
Chris@4:               pfile_in_zip_read_info->filestream,
Chris@4:               buf,read_now)!=read_now)
Chris@4:         return UNZ_ERRNO;
Chris@4: 
Chris@4:     return (int)read_now;
Chris@4: }
Chris@4: 
Chris@4: /*
Chris@4:   Close the file in zip opened with unzipOpenCurrentFile
Chris@4:   Return UNZ_CRCERROR if all the file was read but the CRC is not good
Chris@4: */
Chris@4: extern int ZEXPORT unzCloseCurrentFile (unzFile file)
Chris@4: {
Chris@4:     int err=UNZ_OK;
Chris@4: 
Chris@4:     unz64_s* s;
Chris@4:     file_in_zip64_read_info_s* pfile_in_zip_read_info;
Chris@4:     if (file==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4:     pfile_in_zip_read_info=s->pfile_in_zip_read;
Chris@4: 
Chris@4:     if (pfile_in_zip_read_info==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4: 
Chris@4: 
Chris@4:     if ((pfile_in_zip_read_info->rest_read_uncompressed == 0) &&
Chris@4:         (!pfile_in_zip_read_info->raw))
Chris@4:     {
Chris@4:         if (pfile_in_zip_read_info->crc32 != pfile_in_zip_read_info->crc32_wait)
Chris@4:             err=UNZ_CRCERROR;
Chris@4:     }
Chris@4: 
Chris@4: 
Chris@4:     TRYFREE(pfile_in_zip_read_info->read_buffer);
Chris@4:     pfile_in_zip_read_info->read_buffer = NULL;
Chris@4:     if (pfile_in_zip_read_info->stream_initialised == Z_DEFLATED)
Chris@4:         inflateEnd(&pfile_in_zip_read_info->stream);
Chris@4: #ifdef HAVE_BZIP2
Chris@4:     else if (pfile_in_zip_read_info->stream_initialised == Z_BZIP2ED)
Chris@4:         BZ2_bzDecompressEnd(&pfile_in_zip_read_info->bstream);
Chris@4: #endif
Chris@4: 
Chris@4: 
Chris@4:     pfile_in_zip_read_info->stream_initialised = 0;
Chris@4:     TRYFREE(pfile_in_zip_read_info);
Chris@4: 
Chris@4:     s->pfile_in_zip_read=NULL;
Chris@4: 
Chris@4:     return err;
Chris@4: }
Chris@4: 
Chris@4: 
Chris@4: /*
Chris@4:   Get the global comment string of the ZipFile, in the szComment buffer.
Chris@4:   uSizeBuf is the size of the szComment buffer.
Chris@4:   return the number of byte copied or an error code <0
Chris@4: */
Chris@4: extern int ZEXPORT unzGetGlobalComment (unzFile file, char * szComment, uLong uSizeBuf)
Chris@4: {
Chris@4:     unz64_s* s;
Chris@4:     uLong uReadThis ;
Chris@4:     if (file==NULL)
Chris@4:         return (int)UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4: 
Chris@4:     uReadThis = uSizeBuf;
Chris@4:     if (uReadThis>s->gi.size_comment)
Chris@4:         uReadThis = s->gi.size_comment;
Chris@4: 
Chris@4:     if (ZSEEK64(s->z_filefunc,s->filestream,s->central_pos+22,ZLIB_FILEFUNC_SEEK_SET)!=0)
Chris@4:         return UNZ_ERRNO;
Chris@4: 
Chris@4:     if (uReadThis>0)
Chris@4:     {
Chris@4:       *szComment='\0';
Chris@4:       if (ZREAD64(s->z_filefunc,s->filestream,szComment,uReadThis)!=uReadThis)
Chris@4:         return UNZ_ERRNO;
Chris@4:     }
Chris@4: 
Chris@4:     if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment))
Chris@4:         *(szComment+s->gi.size_comment)='\0';
Chris@4:     return (int)uReadThis;
Chris@4: }
Chris@4: 
Chris@4: /* Additions by RX '2004 */
Chris@4: extern ZPOS64_T ZEXPORT unzGetOffset64(unzFile file)
Chris@4: {
Chris@4:     unz64_s* s;
Chris@4: 
Chris@4:     if (file==NULL)
Chris@4:           return 0; //UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4:     if (!s->current_file_ok)
Chris@4:       return 0;
Chris@4:     if (s->gi.number_entry != 0 && s->gi.number_entry != 0xffff)
Chris@4:       if (s->num_file==s->gi.number_entry)
Chris@4:          return 0;
Chris@4:     return s->pos_in_central_dir;
Chris@4: }
Chris@4: 
Chris@4: extern uLong ZEXPORT unzGetOffset (unzFile file)
Chris@4: {
Chris@4:     ZPOS64_T offset64;
Chris@4: 
Chris@4:     if (file==NULL)
Chris@4:           return 0; //UNZ_PARAMERROR;
Chris@4:     offset64 = unzGetOffset64(file);
Chris@4:     return (uLong)offset64;
Chris@4: }
Chris@4: 
Chris@4: extern int ZEXPORT unzSetOffset64(unzFile file, ZPOS64_T pos)
Chris@4: {
Chris@4:     unz64_s* s;
Chris@4:     int err;
Chris@4: 
Chris@4:     if (file==NULL)
Chris@4:         return UNZ_PARAMERROR;
Chris@4:     s=(unz64_s*)file;
Chris@4: 
Chris@4:     s->pos_in_central_dir = pos;
Chris@4:     s->num_file = s->gi.number_entry;      /* hack */
Chris@4:     err = unz64local_GetCurrentFileInfoInternal(file,&s->cur_file_info,
Chris@4:                                               &s->cur_file_info_internal,
Chris@4:                                               NULL,0,NULL,0,NULL,0);
Chris@4:     s->current_file_ok = (err == UNZ_OK);
Chris@4:     return err;
Chris@4: }
Chris@4: 
Chris@4: extern int ZEXPORT unzSetOffset (unzFile file, uLong pos)
Chris@4: {
Chris@4:     return unzSetOffset64(file,pos);
Chris@4: }