243 lines
7.9 KiB
C++
243 lines
7.9 KiB
C++
#ifndef ZIPHEAD_H
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#define ZIPHEAD_H
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#include "zipios-config.h"
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#include "meta-iostreams.h"
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#include <string>
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#include <vector>
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#include "fileentry.h"
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#include "zipios_defs.h"
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namespace zipios {
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using std::streampos ;
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class ZipCDirEntry ;
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/** A concrete implementation of the abstract FileEntry base class for
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ZipFile entries, specifically for representing the information
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present in the local headers of file entries in a zip file. */
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class BaseExport ZipLocalEntry : public FileEntry {
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friend istream &operator>> ( istream &is, ZipLocalEntry &zcdh ) ;
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friend ostream &operator<< ( ostream &os, const ZipLocalEntry &zlh ) ;
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friend bool operator== ( const ZipLocalEntry &zlh, const ZipCDirEntry &ze ) ;
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public:
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inline ZipLocalEntry( const string &_filename = "",
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const vector< unsigned char > &_extra_field =
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vector< unsigned char >() )
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: gp_bitfield( 0 ),
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_valid( false ) {
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setDefaultExtract() ;
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setName( _filename ) ;
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setExtra( _extra_field ) ;
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}
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void setDefaultExtract() ;
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inline ZipLocalEntry &operator=( const class ZipLocalEntry &src ) ;
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virtual string getComment() const ;
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virtual uint32 getCompressedSize() const ;
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virtual uint32 getCrc() const ;
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virtual vector< unsigned char > getExtra() const ;
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virtual StorageMethod getMethod() const ;
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virtual string getName() const ;
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virtual string getFileName() const ;
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virtual uint32 getSize() const ;
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virtual int getTime() const ;
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virtual bool isValid() const ;
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virtual bool isDirectory() const ;
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virtual void setComment( const string &comment ) ;
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virtual void setCompressedSize( uint32 size ) ;
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virtual void setCrc( uint32 crc ) ;
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virtual void setExtra( const vector< unsigned char > &extra ) ;
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virtual void setMethod( StorageMethod method ) ;
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virtual void setName( const string &name ) ;
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virtual void setSize( uint32 size ) ;
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virtual void setTime( int time ) ;
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virtual string toString() const ;
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int getLocalHeaderSize() const ;
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bool trailingDataDescriptor() const ;
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virtual FileEntry *clone() const ;
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virtual ~ZipLocalEntry() {}
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protected:
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static const uint32 signature ;
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uint16 extract_version ;
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uint16 gp_bitfield ;
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uint16 compress_method ;
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uint16 last_mod_ftime ;
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uint16 last_mod_fdate ;
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uint32 crc_32 ;
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uint32 compress_size ;
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uint32 uncompress_size ;
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uint16 filename_len ;
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uint16 extra_field_len ;
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string filename ;
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vector< unsigned char > extra_field ;
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bool _valid ;
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};
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/** A struct containing fields for the entries in a zip file data
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descriptor, that trails the compressed data in files that were
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created by streaming, ie where the zip compressor cannot seek back
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to the local header and store the data. */
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struct DataDescriptor {
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uint32 crc_32 ;
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uint32 compress_size ;
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uint32 uncompress_size ;
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};
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/** Specialization of ZipLocalEntry, that add fields for storing the
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extra information, that is only present in the entries in the zip
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central directory and not in the local entry headers. */
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class BaseExport ZipCDirEntry : public ZipLocalEntry {
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friend istream &operator>> ( istream &is, ZipCDirEntry &zcdh ) ;
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friend ostream &operator<< ( ostream &os, const ZipCDirEntry &zcdh ) ;
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friend bool operator== ( const ZipLocalEntry &zlh, const ZipCDirEntry &ze ) ;
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public:
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inline ZipCDirEntry( const string &_filename = "",
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const string &_file_comment = "",
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const vector< unsigned char > &_extra_field =
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vector< unsigned char >() )
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: ZipLocalEntry ( _filename, _extra_field ),
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disk_num_start ( 0x0 ),
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intern_file_attr( 0x0 ),
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extern_file_attr( 0x81B40000 )
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// FIXME: I don't understand the external mapping, simply
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// copied value for a file with -rw-rw-r-- permissions
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// compressed with info-zip
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{
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setComment( _file_comment ) ;
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setDefaultWriter() ;
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}
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void setDefaultWriter() ;
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ZipCDirEntry &operator=( const class ZipCDirEntry &src ) ;
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virtual string toString() const ;
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virtual string getComment() const ;
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virtual void setComment( const string &comment ) ;
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virtual uint32 getLocalHeaderOffset() const ;
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virtual void setLocalHeaderOffset( uint32 offset ) ;
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int getCDirHeaderSize() const ;
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virtual FileEntry *clone() const ;
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virtual ~ZipCDirEntry() {}
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private:
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static const uint32 signature ;
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uint16 writer_version ;
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uint16 file_comment_len ;
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uint16 disk_num_start ;
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uint16 intern_file_attr ;
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uint32 extern_file_attr ;
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uint32 rel_offset_loc_head ;
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string file_comment ;
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};
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/** The end of the Central directory structure. This structure is
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stored in the end of the zipfile, and contains information about
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the zipfile, including the position of the start of the central
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directory. */
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class EndOfCentralDirectory {
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friend ostream &operator<< ( ostream &os, const EndOfCentralDirectory &eocd ) ;
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public:
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explicit EndOfCentralDirectory( const string &_zip_comment = "",
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uint16 _disk_num = 0, uint16 _cdir_disk_num = 0,
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uint16 _cdir_entries = 0,
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uint16 _cdir_tot_entries = 0,
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uint32 _cdir_size = 0, uint32 _cdir_offset = 0 )
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: disk_num ( _disk_num ),
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cdir_disk_num ( _cdir_disk_num ),
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cdir_entries ( _cdir_entries ),
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cdir_tot_entries ( _cdir_tot_entries ),
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cdir_size ( _cdir_size ),
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cdir_offset ( _cdir_offset ),
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zip_comment_len ( _zip_comment.size() ),
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zip_comment ( _zip_comment ) {}
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uint32 offset() const { return cdir_offset ; }
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uint16 totalCount() const { return cdir_tot_entries ; }
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void setCDirSize( uint32 size ) { cdir_size = size ; }
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void setOffset( uint32 offset ) { cdir_offset = offset ; }
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void setTotalCount( uint16 c ) { cdir_entries = c ; cdir_tot_entries = c ; }
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int eocdOffSetFromEnd() const { return static_cast<int>(eocd_offset_from_end) ; }
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bool read( vector<unsigned char> &buf, int pos ) ;
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private:
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static const uint32 signature;
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uint16 disk_num ;
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uint16 cdir_disk_num ;
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uint16 cdir_entries ;
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uint16 cdir_tot_entries ;
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uint32 cdir_size ;
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uint32 cdir_offset ;
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uint16 zip_comment_len ;
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streampos eocd_offset_from_end ; // Not a Zip defined field
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string zip_comment;
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bool checkSignature( unsigned char *buf ) const ;
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inline bool checkSignature( uint32 sig ) const ;
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};
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bool operator== ( const ZipLocalEntry &zlh, const ZipCDirEntry &ze ) ;
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inline bool operator== ( const ZipCDirEntry &ze, const ZipLocalEntry &zlh ) {
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return zlh == ze ;
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}
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inline bool operator!= ( const ZipLocalEntry &zlh, const ZipCDirEntry &ze ) {
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return ! ( zlh == ze ) ;
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}
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inline bool operator!= ( const ZipCDirEntry &ze, const ZipLocalEntry &zlh ) {
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return ! ( zlh == ze ) ;
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}
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// Inline member functions
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} // namespace
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#endif
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/** \file
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Header file containing classes and functions for reading the central
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directory and local header fields in a zip archive.
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*/
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/*
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Zipios++ - a small C++ library that provides easy access to .zip files.
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Copyright (C) 2000 Thomas Søndergaard
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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