1599 lines
48 KiB
C
1599 lines
48 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;
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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;
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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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|
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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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/* offset of start of central directory with respect to the
|
|
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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|
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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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|
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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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|
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s=(unz_s*)ALLOC(sizeof(unz_s));
|
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*s=us;
|
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unzGoToFirstFile((unzFile)s);
|
|
return (unzFile)s;
|
|
}
|
|
|
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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;
|
|
{
|
|
int err=UNZ_OK;
|
|
unz_s* s;
|
|
uLong uReadThis ;
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
|
|
uReadThis = uSizeBuf;
|
|
if (uReadThis>s->gi.size_comment)
|
|
uReadThis = s->gi.size_comment;
|
|
|
|
if (ZSEEK(s->z_filefunc,s->filestream,s->central_pos+22,ZLIB_FILEFUNC_SEEK_SET)!=0)
|
|
return UNZ_ERRNO;
|
|
|
|
if (uReadThis>0)
|
|
{
|
|
*szComment='\0';
|
|
if (ZREAD(s->z_filefunc,s->filestream,szComment,uReadThis)!=uReadThis)
|
|
return UNZ_ERRNO;
|
|
}
|
|
|
|
if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment))
|
|
*(szComment+s->gi.size_comment)='\0';
|
|
return (int)uReadThis;
|
|
}
|
|
|
|
/* Additions by RX '2004 */
|
|
extern uLong ZEXPORT unzGetOffset (file)
|
|
unzFile file;
|
|
{
|
|
unz_s* s;
|
|
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
if (!s->current_file_ok)
|
|
return 0;
|
|
if (s->gi.number_entry != 0 && s->gi.number_entry != 0xffff)
|
|
if (s->num_file==s->gi.number_entry)
|
|
return 0;
|
|
return s->pos_in_central_dir;
|
|
}
|
|
|
|
extern int ZEXPORT unzSetOffset (file, pos)
|
|
unzFile file;
|
|
uLong pos;
|
|
{
|
|
unz_s* s;
|
|
int err;
|
|
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
|
|
s->pos_in_central_dir = pos;
|
|
s->num_file = s->gi.number_entry; /* hack */
|
|
err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,
|
|
&s->cur_file_info_internal,
|
|
NULL,0,NULL,0,NULL,0);
|
|
s->current_file_ok = (err == UNZ_OK);
|
|
return err;
|
|
}
|