mirror of
https://github.com/wiidev/usbloadergx.git
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9e79c9d99b
* code cleanup
1614 lines
49 KiB
C
1614 lines
49 KiB
C
/* unzip.c -- IO for uncompress .zip files using zlib
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Version 1.01e, February 12th, 2005
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Copyright (C) 1998-2005 Gilles Vollant
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Read unzip.h for more info
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*/
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/* Decryption code comes from crypt.c by Info-ZIP but has been greatly reduced in terms of
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compatibility with older software. The following is from the original crypt.c. Code
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woven in by Terry Thorsen 1/2003.
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*/
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/*
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Copyright (c) 1990-2000 Info-ZIP. All rights reserved.
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See the accompanying file LICENSE, version 2000-Apr-09 or later
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(the contents of which are also included in zip.h) for terms of use.
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If, for some reason, all these files are missing, the Info-ZIP license
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also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html
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*/
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/*
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crypt.c (full version) by Info-ZIP. Last revised: [see crypt.h]
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The encryption/decryption parts of this source code (as opposed to the
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non-echoing password parts) were originally written in Europe. The
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whole source package can be freely distributed, including from the USA.
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(Prior to January 2000, re-export from the US was a violation of US law.)
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*/
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/*
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This encryption code is a direct transcription of the algorithm from
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Roger Schlafly, described by Phil Katz in the file appnote.txt. This
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file (appnote.txt) is distributed with the PKZIP program (even in the
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version without encryption capabilities).
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "zlib.h"
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#include "unzip.h"
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#ifdef STDC
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# include <stddef.h>
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# include <string.h>
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# include <stdlib.h>
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#endif
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#ifdef NO_ERRNO_H
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extern int errno;
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#else
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# include <errno.h>
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#endif
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#ifndef local
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# define local static
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#endif
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/* compile with -Dlocal if your debugger can't find static symbols */
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#ifndef CASESENSITIVITYDEFAULT_NO
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# if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES)
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# define CASESENSITIVITYDEFAULT_NO
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# endif
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#endif
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#ifndef UNZ_BUFSIZE
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#define UNZ_BUFSIZE (16384)
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#endif
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#ifndef UNZ_MAXFILENAMEINZIP
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#define UNZ_MAXFILENAMEINZIP (256)
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#endif
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#ifndef ALLOC
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# define ALLOC(size) (malloc(size))
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#endif
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#ifndef TRYFREE
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# define TRYFREE(p) {if (p) free(p);}
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#endif
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#define SIZECENTRALDIRITEM (0x2e)
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#define SIZEZIPLOCALHEADER (0x1e)
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const char unz_copyright[] =
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" unzip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll";
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/* unz_file_info_interntal contain internal info about a file in zipfile*/
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typedef struct unz_file_info_internal_s
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{
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uLong offset_curfile;/* relative offset of local header 4 bytes */
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} unz_file_info_internal;
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/* file_in_zip_read_info_s contain internal information about a file in zipfile,
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when reading and decompress it */
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typedef struct
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{
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char *read_buffer; /* internal buffer for compressed data */
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z_stream stream; /* zLib stream structure for inflate */
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uLong pos_in_zipfile; /* position in byte on the zipfile, for fseek*/
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uLong stream_initialised; /* flag set if stream structure is initialised*/
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uLong offset_local_extrafield;/* offset of the local extra field */
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uInt size_local_extrafield;/* size of the local extra field */
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uLong pos_local_extrafield; /* position in the local extra field in read*/
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uLong crc32; /* crc32 of all data uncompressed */
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uLong crc32_wait; /* crc32 we must obtain after decompress all */
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uLong rest_read_compressed; /* number of byte to be decompressed */
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uLong rest_read_uncompressed;/*number of byte to be obtained after decomp*/
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zlib_filefunc_def z_filefunc;
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voidpf filestream; /* io structore of the zipfile */
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uLong compression_method; /* compression method (0==store) */
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uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
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int raw;
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} file_in_zip_read_info_s;
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/* unz_s contain internal information about the zipfile
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*/
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typedef struct
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{
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zlib_filefunc_def z_filefunc;
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voidpf filestream; /* io structore of the zipfile */
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unz_global_info gi; /* public global information */
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uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
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uLong num_file; /* number of the current file in the zipfile*/
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uLong pos_in_central_dir; /* pos of the current file in the central dir*/
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uLong current_file_ok; /* flag about the usability of the current file*/
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uLong central_pos; /* position of the beginning of the central dir*/
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uLong size_central_dir; /* size of the central directory */
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uLong offset_central_dir; /* offset of start of central directory with
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respect to the starting disk number */
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unz_file_info cur_file_info; /* public info about the current file in zip*/
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unz_file_info_internal cur_file_info_internal; /* private info about it*/
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file_in_zip_read_info_s* pfile_in_zip_read; /* structure about the current
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file if we are decompressing it */
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int encrypted;
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# ifndef NOUNCRYPT
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unsigned long keys[3]; /* keys defining the pseudo-random sequence */
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const unsigned long* pcrc_32_tab;
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# endif
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} unz_s;
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#ifndef NOUNCRYPT
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#include "crypt.h"
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#endif
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/* ===========================================================================
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Read a byte from a gz_stream; update next_in and avail_in. Return EOF
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for end of file.
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IN assertion: the stream s has been sucessfully opened for reading.
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*/
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local int unzlocal_getByte OF( (
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const zlib_filefunc_def* pzlib_filefunc_def,
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voidpf filestream,
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int *pi ) );
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local int unzlocal_getByte( pzlib_filefunc_def, filestream, pi )
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const zlib_filefunc_def* pzlib_filefunc_def;
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voidpf filestream;
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int *pi;
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{
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unsigned char c;
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int err = ( int )ZREAD( *pzlib_filefunc_def, filestream, &c, 1 );
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if ( err == 1 )
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{
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*pi = ( int )c;
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return UNZ_OK;
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}
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else
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{
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if ( ZERROR( *pzlib_filefunc_def, filestream ) )
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return UNZ_ERRNO;
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else
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return UNZ_EOF;
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}
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}
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/* ===========================================================================
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Reads a long in LSB order from the given gz_stream. Sets
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*/
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local int unzlocal_getShort OF( (
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const zlib_filefunc_def* pzlib_filefunc_def,
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voidpf filestream,
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uLong *pX ) );
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local int unzlocal_getShort ( pzlib_filefunc_def, filestream, pX )
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const zlib_filefunc_def* pzlib_filefunc_def;
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voidpf filestream;
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uLong *pX;
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{
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uLong x ;
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int i = 0;
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int err;
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err = unzlocal_getByte( pzlib_filefunc_def, filestream, &i );
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x = ( uLong )i;
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if ( err == UNZ_OK )
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err = unzlocal_getByte( pzlib_filefunc_def, filestream, &i );
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x += ( ( uLong )i ) << 8;
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if ( err == UNZ_OK )
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*pX = x;
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else
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*pX = 0;
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return err;
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}
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local int unzlocal_getLong OF( (
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const zlib_filefunc_def* pzlib_filefunc_def,
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voidpf filestream,
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uLong *pX ) );
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local int unzlocal_getLong ( pzlib_filefunc_def, filestream, pX )
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const zlib_filefunc_def* pzlib_filefunc_def;
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voidpf filestream;
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uLong *pX;
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{
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uLong x ;
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int i = 0;
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int err;
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err = unzlocal_getByte( pzlib_filefunc_def, filestream, &i );
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x = ( uLong )i;
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if ( err == UNZ_OK )
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err = unzlocal_getByte( pzlib_filefunc_def, filestream, &i );
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x += ( ( uLong )i ) << 8;
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if ( err == UNZ_OK )
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err = unzlocal_getByte( pzlib_filefunc_def, filestream, &i );
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x += ( ( uLong )i ) << 16;
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if ( err == UNZ_OK )
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err = unzlocal_getByte( pzlib_filefunc_def, filestream, &i );
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x += ( ( uLong )i ) << 24;
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if ( err == UNZ_OK )
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*pX = x;
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else
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*pX = 0;
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return err;
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}
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/* My own strcmpi / strcasecmp */
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local int strcmpcasenosensitive_internal ( fileName1, fileName2 )
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const char* fileName1;
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const char* fileName2;
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{
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for ( ;; )
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{
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char c1 = *( fileName1++ );
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char c2 = *( fileName2++ );
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if ( ( c1 >= 'a' ) && ( c1 <= 'z' ) )
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c1 -= 0x20;
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if ( ( c2 >= 'a' ) && ( c2 <= 'z' ) )
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c2 -= 0x20;
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if ( c1 == '\0' )
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return ( ( c2 == '\0' ) ? 0 : -1 );
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if ( c2 == '\0' )
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return 1;
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if ( c1 < c2 )
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return -1;
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if ( c1 > c2 )
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return 1;
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}
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}
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#ifdef CASESENSITIVITYDEFAULT_NO
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#define CASESENSITIVITYDEFAULTVALUE 2
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#else
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#define CASESENSITIVITYDEFAULTVALUE 1
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#endif
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#ifndef STRCMPCASENOSENTIVEFUNCTION
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#define STRCMPCASENOSENTIVEFUNCTION strcmpcasenosensitive_internal
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#endif
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/*
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Compare two filename (fileName1,fileName2).
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If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp)
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If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi
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or strcasecmp)
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If iCaseSenisivity = 0, case sensitivity is defaut of your operating system
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(like 1 on Unix, 2 on Windows)
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*/
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extern int ZEXPORT unzStringFileNameCompare ( fileName1, fileName2, iCaseSensitivity )
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const char* fileName1;
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const char* fileName2;
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int iCaseSensitivity;
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{
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if ( iCaseSensitivity == 0 )
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iCaseSensitivity = CASESENSITIVITYDEFAULTVALUE;
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if ( iCaseSensitivity == 1 )
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return strcmp( fileName1, fileName2 );
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return STRCMPCASENOSENTIVEFUNCTION( fileName1, fileName2 );
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}
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#ifndef BUFREADCOMMENT
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#define BUFREADCOMMENT (0x400)
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#endif
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/*
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Locate the Central directory of a zipfile (at the end, just before
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the global comment)
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*/
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local uLong unzlocal_SearchCentralDir OF( (
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const zlib_filefunc_def* pzlib_filefunc_def,
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voidpf filestream ) );
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local uLong unzlocal_SearchCentralDir( pzlib_filefunc_def, filestream )
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const zlib_filefunc_def* pzlib_filefunc_def;
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voidpf filestream;
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{
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unsigned char* buf;
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uLong uSizeFile;
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uLong uBackRead;
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uLong uMaxBack = 0xffff; /* maximum size of global comment */
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uLong uPosFound = 0;
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if ( ZSEEK( *pzlib_filefunc_def, filestream, 0, ZLIB_FILEFUNC_SEEK_END ) != 0 )
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return 0;
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uSizeFile = ZTELL( *pzlib_filefunc_def, filestream );
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if ( uMaxBack > uSizeFile )
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uMaxBack = uSizeFile;
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buf = ( unsigned char* )ALLOC( BUFREADCOMMENT + 4 );
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if ( buf == NULL )
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return 0;
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uBackRead = 4;
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while ( uBackRead < uMaxBack )
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{
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uLong uReadSize, uReadPos ;
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int i;
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if ( uBackRead + BUFREADCOMMENT > uMaxBack )
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uBackRead = uMaxBack;
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else
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uBackRead += BUFREADCOMMENT;
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uReadPos = uSizeFile - uBackRead ;
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uReadSize = ( ( BUFREADCOMMENT + 4 ) < ( uSizeFile - uReadPos ) ) ?
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( BUFREADCOMMENT + 4 ) : ( uSizeFile - uReadPos );
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if ( ZSEEK( *pzlib_filefunc_def, filestream, uReadPos, ZLIB_FILEFUNC_SEEK_SET ) != 0 )
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break;
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if ( ZREAD( *pzlib_filefunc_def, filestream, buf, uReadSize ) != uReadSize )
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break;
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for ( i = ( int )uReadSize - 3; ( i-- ) > 0; )
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if ( ( ( *( buf + i ) ) == 0x50 ) && ( ( *( buf + i + 1 ) ) == 0x4b ) &&
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( ( *( buf + i + 2 ) ) == 0x05 ) && ( ( *( buf + i + 3 ) ) == 0x06 ) )
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{
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uPosFound = uReadPos + i;
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break;
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}
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if ( uPosFound != 0 )
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break;
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}
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TRYFREE( buf );
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return uPosFound;
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}
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/*
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Open a Zip file. path contain the full pathname (by example,
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on a Windows NT computer "c:\\test\\zlib114.zip" or on an Unix computer
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"zlib/zlib114.zip".
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If the zipfile cannot be opened (file doesn't exist or in not valid), the
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return value is NULL.
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Else, the return value is a unzFile Handle, usable with other function
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of this unzip package.
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*/
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extern unzFile ZEXPORT unzOpen2 ( path, pzlib_filefunc_def )
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const char *path;
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zlib_filefunc_def* pzlib_filefunc_def;
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{
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unz_s us;
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unz_s *s;
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uLong central_pos, uL;
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uLong number_disk; /* number of the current dist, used for
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spaning ZIP, unsupported, always 0*/
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uLong number_disk_with_CD; /* number the the disk with central dir, used
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for spaning ZIP, unsupported, always 0*/
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uLong number_entry_CD; /* total number of entries in
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the central dir
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(same than number_entry on nospan) */
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int err = UNZ_OK;
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if ( unz_copyright[0] != ' ' )
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return NULL;
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if ( pzlib_filefunc_def == NULL )
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fill_fopen_filefunc( &us.z_filefunc );
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else
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us.z_filefunc = *pzlib_filefunc_def;
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us.filestream = ( *( us.z_filefunc.zopen_file ) )( us.z_filefunc.opaque,
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path,
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ZLIB_FILEFUNC_MODE_READ |
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ZLIB_FILEFUNC_MODE_EXISTING );
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if ( us.filestream == NULL )
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return NULL;
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central_pos = unzlocal_SearchCentralDir( &us.z_filefunc, us.filestream );
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if ( central_pos == 0 )
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err = UNZ_ERRNO;
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if ( ZSEEK( us.z_filefunc, us.filestream,
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central_pos, ZLIB_FILEFUNC_SEEK_SET ) != 0 )
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err = UNZ_ERRNO;
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/* the signature, already checked */
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if ( unzlocal_getLong( &us.z_filefunc, us.filestream, &uL ) != UNZ_OK )
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err = UNZ_ERRNO;
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/* number of this disk */
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if ( unzlocal_getShort( &us.z_filefunc, us.filestream, &number_disk ) != UNZ_OK )
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err = UNZ_ERRNO;
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/* number of the disk with the start of the central directory */
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if ( unzlocal_getShort( &us.z_filefunc, us.filestream, &number_disk_with_CD ) != UNZ_OK )
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err = UNZ_ERRNO;
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/* total number of entries in the central dir on this disk */
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if ( unzlocal_getShort( &us.z_filefunc, us.filestream, &us.gi.number_entry ) != UNZ_OK )
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err = UNZ_ERRNO;
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/* total number of entries in the central dir */
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if ( unzlocal_getShort( &us.z_filefunc, us.filestream, &number_entry_CD ) != UNZ_OK )
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err = UNZ_ERRNO;
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if ( ( number_entry_CD != us.gi.number_entry ) ||
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( number_disk_with_CD != 0 ) ||
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( number_disk != 0 ) )
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err = UNZ_BADZIPFILE;
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/* size of the central directory */
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if ( unzlocal_getLong( &us.z_filefunc, us.filestream, &us.size_central_dir ) != UNZ_OK )
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err = UNZ_ERRNO;
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|
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/* offset of start of central directory with respect to the
|
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starting disk number */
|
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if ( unzlocal_getLong( &us.z_filefunc, us.filestream, &us.offset_central_dir ) != UNZ_OK )
|
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err = UNZ_ERRNO;
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/* zipfile comment length */
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if ( unzlocal_getShort( &us.z_filefunc, us.filestream, &us.gi.size_comment ) != UNZ_OK )
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err = UNZ_ERRNO;
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if ( ( central_pos < us.offset_central_dir + us.size_central_dir ) &&
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( err == UNZ_OK ) )
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err = UNZ_BADZIPFILE;
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|
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if ( err != UNZ_OK )
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{
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ZCLOSE( us.z_filefunc, us.filestream );
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return NULL;
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}
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us.byte_before_the_zipfile = central_pos -
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( us.offset_central_dir + us.size_central_dir );
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us.central_pos = central_pos;
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us.pfile_in_zip_read = NULL;
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us.encrypted = 0;
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s = ( unz_s* )ALLOC( sizeof( unz_s ) );
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*s = us;
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unzGoToFirstFile( ( unzFile )s );
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return ( unzFile )s;
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|
}
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|
|
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;
|
|
{
|
|
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;
|
|
}
|