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Diffstat (limited to 'kio/kio/kzip.cpp')
| -rw-r--r-- | kio/kio/kzip.cpp | 1460 |
1 files changed, 0 insertions, 1460 deletions
diff --git a/kio/kio/kzip.cpp b/kio/kio/kzip.cpp deleted file mode 100644 index 6241cc1ca..000000000 --- a/kio/kio/kzip.cpp +++ /dev/null @@ -1,1460 +0,0 @@ -/* This file is part of the KDE libraries - Copyright (C) 2000 David Faure <faure@kde.org> - Copyright (C) 2002 Holger Schroeder <holger-kde@holgis.net> - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public - License version 2 as published by the Free Software Foundation. - - This library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public License - along with this library; see the file COPYING.LIB. If not, write to - the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, - Boston, MA 02110-1301, USA. -*/ - -/* - This class implements a kioslave to access ZIP files from KDE. - you can use it in IO_ReadOnly or in IO_WriteOnly mode, and it - behaves just as expected (i hope ;-) ). - It can also be used in IO_ReadWrite mode, in this case one can - append files to an existing zip archive. when you append new files, which - are not yet in the zip, it works as expected, they are appended at the end. - when you append a file, which is already in the file, the reference to the - old file is dropped and the new one is added to the zip. but the - old data from the file itself is not deleted, it is still in the - zipfile. so when you want to have a small and garbagefree zipfile, - just read the contents of the appended zipfile and write it to a new one - in IO_WriteOnly mode. especially take care of this, when you don't want - to leak information of how intermediate versions of files in the zip - were looking. - For more information on the zip fileformat go to - http://www.pkware.com/support/appnote.html . - -*/ - -#include "kzip.h" -#include "kfilterdev.h" -#include "klimitediodevice.h" -#include <kmimetype.h> -#include <ksavefile.h> -#include <kdebug.h> - -#include <tqasciidict.h> -#include <tqfile.h> -#include <tqdir.h> -#include <tqdatetime.h> -#include <tqptrlist.h> - -#include <zlib.h> -#include <time.h> -#include <string.h> - -const int max_path_len = 4095; // maximum number of character a path may contain - -static void transformToMsDos(const TQDateTime& dt, char* buffer) -{ - if ( dt.isValid() ) - { - const TQ_UINT16 time = - ( dt.time().hour() << 11 ) // 5 bit hour - | ( dt.time().minute() << 5 ) // 6 bit minute - | ( dt.time().second() >> 1 ); // 5 bit double seconds - - buffer[0] = char(time); - buffer[1] = char(time >> 8); - - const TQ_UINT16 date = - ( ( dt.date().year() - 1980 ) << 9 ) // 7 bit year 1980-based - | ( dt.date().month() << 5 ) // 4 bit month - | ( dt.date().day() ); // 5 bit day - - buffer[2] = char(date); - buffer[3] = char(date >> 8); - } - else // !dt.isValid(), assume 1980-01-01 midnight - { - buffer[0] = 0; - buffer[1] = 0; - buffer[2] = 33; - buffer[3] = 0; - } -} - -static time_t transformFromMsDos(const char* buffer) -{ - TQ_UINT16 time = (uchar)buffer[0] | ( (uchar)buffer[1] << 8 ); - int h = time >> 11; - int m = ( time & 0x7ff ) >> 5; - int s = ( time & 0x1f ) * 2 ; - TQTime qt(h, m, s); - - TQ_UINT16 date = (uchar)buffer[2] | ( (uchar)buffer[3] << 8 ); - int y = ( date >> 9 ) + 1980; - int o = ( date & 0x1ff ) >> 5; - int d = ( date & 0x1f ); - TQDate qd(y, o, d); - - TQDateTime dt( qd, qt ); - return dt.toTime_t(); -} - -// == parsing routines for zip headers - -/** all relevant information about parsing file information */ -struct ParseFileInfo { - // file related info -// TQCString name; // filename - mode_t perm; // permissions of this file - time_t atime; // last access time (UNIX format) - time_t mtime; // modification time (UNIX format) - time_t ctime; // creation time (UNIX format) - int uid; // user id (-1 if not specified) - int gid; // group id (-1 if not specified) - TQCString guessed_symlink; // guessed symlink target - int extralen; // length of extra field - - // parsing related info - bool exttimestamp_seen; // true if extended timestamp extra field - // has been parsed - bool newinfounix_seen; // true if Info-ZIP Unix New extra field has - // been parsed - - ParseFileInfo() : perm(0100644), uid(-1), gid(-1), extralen(0), - exttimestamp_seen(false), newinfounix_seen(false) { - ctime = mtime = atime = time(0); - } -}; - -/** updates the parse information with the given extended timestamp extra field. - * @param buffer start content of buffer known to contain an extended - * timestamp extra field (without magic & size) - * @param size size of field content (must not count magic and size entries) - * @param islocal true if this is a local field, false if central - * @param pfi ParseFileInfo object to be updated - * @return true if processing was successful - */ -static bool parseExtTimestamp(const char *buffer, int size, bool islocal, - ParseFileInfo &pfi) { - if (size < 1) { - kdDebug(7040) << "premature end of extended timestamp (#1)" << endl; - return false; - }/*end if*/ - int flags = *buffer; // read flags - buffer += 1; - size -= 1; - - if (flags & 1) { // contains modification time - if (size < 4) { - kdDebug(7040) << "premature end of extended timestamp (#2)" << endl; - return false; - }/*end if*/ - pfi.mtime = time_t((uchar)buffer[0] | (uchar)buffer[1] << 8 - | (uchar)buffer[2] << 16 | (uchar)buffer[3] << 24); - buffer += 4; - size -= 4; - }/*end if*/ - // central extended field cannot contain more than the modification time - // even if other flags are set - if (!islocal) { - pfi.exttimestamp_seen = true; - return true; - }/*end if*/ - - if (flags & 2) { // contains last access time - if (size < 4) { - kdDebug(7040) << "premature end of extended timestamp (#3)" << endl; - return true; - }/*end if*/ - pfi.atime = time_t((uchar)buffer[0] | (uchar)buffer[1] << 8 - | (uchar)buffer[2] << 16 | (uchar)buffer[3] << 24); - buffer += 4; - size -= 4; - }/*end if*/ - - if (flags & 4) { // contains creation time - if (size < 4) { - kdDebug(7040) << "premature end of extended timestamp (#4)" << endl; - return true; - }/*end if*/ - pfi.ctime = time_t((uchar)buffer[0] | (uchar)buffer[1] << 8 - | (uchar)buffer[2] << 16 | (uchar)buffer[3] << 24); - buffer += 4; - }/*end if*/ - - pfi.exttimestamp_seen = true; - return true; -} - -/** updates the parse information with the given Info-ZIP Unix old extra field. - * @param buffer start of content of buffer known to contain an Info-ZIP - * Unix old extra field (without magic & size) - * @param size size of field content (must not count magic and size entries) - * @param islocal true if this is a local field, false if central - * @param pfi ParseFileInfo object to be updated - * @return true if processing was successful - */ -static bool parseInfoZipUnixOld(const char *buffer, int size, bool islocal, - ParseFileInfo &pfi) { - // spec mandates to omit this field if one of the newer fields are available - if (pfi.exttimestamp_seen || pfi.newinfounix_seen) return true; - - if (size < 8) { - kdDebug(7040) << "premature end of Info-ZIP unix extra field old" << endl; - return false; - }/*end if*/ - - pfi.atime = time_t((uchar)buffer[0] | (uchar)buffer[1] << 8 - | (uchar)buffer[2] << 16 | (uchar)buffer[3] << 24); - buffer += 4; - pfi.mtime = time_t((uchar)buffer[0] | (uchar)buffer[1] << 8 - | (uchar)buffer[2] << 16 | (uchar)buffer[3] << 24); - buffer += 4; - if (islocal && size >= 12) { - pfi.uid = (uchar)buffer[0] | (uchar)buffer[1] << 8; - buffer += 2; - pfi.gid = (uchar)buffer[0] | (uchar)buffer[1] << 8; - buffer += 2; - }/*end if*/ - return true; -} - -#if 0 // not needed yet -/** updates the parse information with the given Info-ZIP Unix new extra field. - * @param buffer start of content of buffer known to contain an Info-ZIP - * Unix new extra field (without magic & size) - * @param size size of field content (must not count magic and size entries) - * @param islocal true if this is a local field, false if central - * @param pfi ParseFileInfo object to be updated - * @return true if processing was successful - */ -static bool parseInfoZipUnixNew(const char *buffer, int size, bool islocal, - ParseFileInfo &pfi) { - if (!islocal) { // contains nothing in central field - pfi.newinfounix = true; - return true; - }/*end if*/ - - if (size < 4) { - kdDebug(7040) << "premature end of Info-ZIP unix extra field new" << endl; - return false; - }/*end if*/ - - pfi.uid = (uchar)buffer[0] | (uchar)buffer[1] << 8; - buffer += 2; - pfi.gid = (uchar)buffer[0] | (uchar)buffer[1] << 8; - buffer += 2; - - pfi.newinfounix = true; - return true; -} -#endif - -/** - * parses the extra field - * @param buffer start of buffer where the extra field is to be found - * @param size size of the extra field - * @param islocal true if this is part of a local header, false if of central - * @param pfi ParseFileInfo object which to write the results into - * @return true if parsing was successful - */ -static bool parseExtraField(const char *buffer, int size, bool islocal, - ParseFileInfo &pfi) { - // extra field in central directory doesn't contain useful data, so we - // don't bother parsing it - if (!islocal) return true; - - while (size >= 4) { // as long as a potential extra field can be read - int magic = (uchar)buffer[0] | (uchar)buffer[1] << 8; - buffer += 2; - int fieldsize = (uchar)buffer[0] | (uchar)buffer[1] << 8; - buffer += 2; - size -= 4; - - if (fieldsize > size) { - //kdDebug(7040) << "fieldsize: " << fieldsize << " size: " << size << endl; - kdDebug(7040) << "premature end of extra fields reached" << endl; - break; - }/*end if*/ - - switch (magic) { - case 0x5455: // extended timestamp - if (!parseExtTimestamp(buffer, fieldsize, islocal, pfi)) return false; - break; - case 0x5855: // old Info-ZIP unix extra field - if (!parseInfoZipUnixOld(buffer, fieldsize, islocal, pfi)) return false; - break; -#if 0 // not needed yet - case 0x7855: // new Info-ZIP unix extra field - if (!parseInfoZipUnixNew(buffer, fieldsize, islocal, pfi)) return false; - break; -#endif - default: - /* ignore everything else */; - }/*end switch*/ - - buffer += fieldsize; - size -= fieldsize; - }/*wend*/ - return true; -} - -//////////////////////////////////////////////////////////////////////// -/////////////////////////// KZip /////////////////////////////////////// -//////////////////////////////////////////////////////////////////////// - -class KZip::KZipPrivate -{ -public: - KZipPrivate() - : m_crc( 0 ), - m_currentFile( 0L ), - m_currentDev( 0L ), - m_compression( 8 ), - m_extraField( KZip::NoExtraField ), - m_offset( 0L ), - m_saveFile( 0 ) {} - - unsigned long m_crc; // checksum - KZipFileEntry* m_currentFile; // file currently being written - TQIODevice* m_currentDev; // filterdev used to write to the above file - TQPtrList<KZipFileEntry> m_fileList; // flat list of all files, for the index (saves a recursive method ;) - int m_compression; - KZip::ExtraField m_extraField; - unsigned int m_offset; // holds the offset of the place in the zip, - // where new data can be appended. after openarchive it points to 0, when in - // writeonly mode, or it points to the beginning of the central directory. - // each call to writefile updates this value. - KSaveFile* m_saveFile; -}; - -KZip::KZip( const TQString& filename ) - : KArchive( 0L ) -{ - //kdDebug(7040) << "KZip(filename) reached." << endl; - Q_ASSERT( !filename.isEmpty() ); - m_filename = filename; - d = new KZipPrivate; - // unusual: this ctor leaves the device set to 0. - // This is for the use of KSaveFile, see openArchive. - // KDE4: move KSaveFile support to base class, KArchive. -} - -KZip::KZip( TQIODevice * dev ) - : KArchive( dev ) -{ - //kdDebug(7040) << "KZip::KZip( TQIODevice * dev) reached." << endl; - d = new KZipPrivate; -} - -KZip::~KZip() -{ - // mjarrett: Closes to prevent ~KArchive from aborting w/o device - //kdDebug(7040) << "~KZip reached." << endl; - if( isOpened() ) - close(); - if ( !m_filename.isEmpty() ) { // we created the device ourselves - if ( d->m_saveFile ) // writing mode - delete d->m_saveFile; - else // reading mode - delete device(); // (the TQFile) - } - delete d; -} - -bool KZip::openArchive( int mode ) -{ - //kdDebug(7040) << "openarchive reached." << endl; - d->m_fileList.clear(); - - switch ( mode ) { - case IO_WriteOnly: - // The use of KSaveFile can't be done in the ctor (no mode known yet) - // Ideally we would reimplement open() and do it there (BIC) - if ( !m_filename.isEmpty() ) { - kdDebug(7040) << "Writing to a file using KSaveFile" << endl; - d->m_saveFile = new KSaveFile( m_filename ); - if ( d->m_saveFile->status() != 0 ) { - kdWarning(7040) << "KSaveFile creation for " << m_filename << " failed, " << strerror( d->m_saveFile->status() ) << endl; - delete d->m_saveFile; - d->m_saveFile = 0; - return false; - } - Q_ASSERT( d->m_saveFile->file() ); - setDevice( TQT_TQIODEVICE(d->m_saveFile->file()) ); - } - return true; - case IO_ReadOnly: - case IO_ReadWrite: - { - // ReadWrite mode still uses TQFile for now; we'd need to copy to the tempfile, in fact. - if ( !m_filename.isEmpty() ) { - setDevice( TQT_TQIODEVICE(new TQFile( m_filename )) ); - if ( !device()->open( mode ) ) - return false; - } - break; // continued below - } - default: - kdWarning(7040) << "Unsupported mode " << mode << endl; - return false; - } - - char buffer[47]; - - // Check that it's a valid ZIP file - // the above code opened the underlying device already. - TQIODevice* dev = device(); - - if (!dev) { - return false; - } - - uint offset = 0; // holds offset, where we read - int n; - - // contains information gathered from the local file headers - TQAsciiDict<ParseFileInfo> pfi_map(1009, true /*case sensitive */, true /*copy keys*/); - pfi_map.setAutoDelete(true); - - // We set a bool for knowing if we are allowed to skip the start of the file - bool startOfFile = true; - - for (;;) // repeat until 'end of entries' signature is reached - { -kdDebug(7040) << "loop starts" << endl; -kdDebug(7040) << "dev->at() now : " << dev->at() << endl; - n = dev->readBlock( buffer, 4 ); - - if (n < 4) - { - kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. (#1)" << endl; - - return false; - } - - if ( !memcmp( buffer, "PK\5\6", 4 ) ) // 'end of entries' - { - kdDebug(7040) << "PK56 found end of archive" << endl; - startOfFile = false; - break; - } - - if ( !memcmp( buffer, "PK\3\4", 4 ) ) // local file header - { - kdDebug(7040) << "PK34 found local file header" << endl; - startOfFile = false; - // can this fail ??? - dev->at( dev->at() + 2 ); // skip 'version needed to extract' - - // read static header stuff - n = dev->readBlock( buffer, 24 ); - if (n < 24) { - kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. (#4)" << endl; - return false; - } - - int gpf = (uchar)buffer[0]; // "general purpose flag" not "general protection fault" ;-) - int compression_mode = (uchar)buffer[2] | (uchar)buffer[3] << 8; - time_t mtime = transformFromMsDos( buffer+4 ); - - TQ_LONG compr_size = (uchar)buffer[12] | (uchar)buffer[13] << 8 - | (uchar)buffer[14] << 16 | (uchar)buffer[15] << 24; - TQ_LONG uncomp_size = (uchar)buffer[16] | (uchar)buffer[17] << 8 - | (uchar)buffer[18] << 16 | (uchar)buffer[19] << 24; - int namelen = (uchar)buffer[20] | (uchar)buffer[21] << 8; - int extralen = (uchar)buffer[22] | (uchar)buffer[23] << 8; - - kdDebug(7040) << "general purpose bit flag: " << gpf << endl; - kdDebug(7040) << "compressed size: " << compr_size << endl; - kdDebug(7040) << "uncompressed size: " << uncomp_size << endl; - kdDebug(7040) << "namelen: " << namelen << endl; - kdDebug(7040) << "extralen: " << extralen << endl; - kdDebug(7040) << "archive size: " << dev->size() << endl; - - // read filename - TQCString filename(namelen + 1); - n = dev->readBlock(filename.data(), namelen); - if ( n < namelen ) { - kdWarning(7040) << "Invalid ZIP file. Name not completely read (#2)" << endl; - return false; - } - - ParseFileInfo *pfi = new ParseFileInfo(); - pfi->mtime = mtime; - pfi_map.insert(filename.data(), pfi); - - // read and parse the beginning of the extra field, - // skip rest of extra field in case it is too long - unsigned int extraFieldEnd = dev->at() + extralen; - pfi->extralen = extralen; - int handledextralen = QMIN(extralen, (int)sizeof buffer); - - kdDebug(7040) << "handledextralen: " << handledextralen << endl; - - n = dev->readBlock(buffer, handledextralen); - // no error msg necessary as we deliberately truncate the extra field - if (!parseExtraField(buffer, handledextralen, true, *pfi)) - { - kdWarning(7040) << "Invalid ZIP File. Broken ExtraField." << endl; - return false; - } - - // jump to end of extra field - dev->at( extraFieldEnd ); - - // we have to take care of the 'general purpose bit flag'. - // if bit 3 is set, the header doesn't contain the length of - // the file and we look for the signature 'PK\7\8'. - if ( gpf & 8 ) - { - // here we have to read through the compressed data to find - // the next PKxx - kdDebug(7040) << "trying to seek for next PK78" << endl; - bool foundSignature = false; - - while (!foundSignature) - { - n = dev->readBlock( buffer, 1 ); - if (n < 1) - { - kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. (#2)" << endl; - return false; - } - - if ( buffer[0] != 'P' ) - continue; - - n = dev->readBlock( buffer, 3 ); - if (n < 3) - { - kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. (#3)" << endl; - return false; - } - - // we have to detect three magic tokens here: - // PK34 for the next local header in case there is no data descriptor - // PK12 for the central header in case there is no data descriptor - // PK78 for the data descriptor in case it is following the compressed data - - if ( buffer[0] == 'K' && buffer[1] == 7 && buffer[2] == 8 ) - { - foundSignature = true; - dev->at( dev->at() + 12 ); // skip the 'data_descriptor' - } - else if ( ( buffer[0] == 'K' && buffer[1] == 1 && buffer[2] == 2 ) - || ( buffer[0] == 'K' && buffer[1] == 3 && buffer[2] == 4 ) ) - { - foundSignature = true; - dev->at( dev->at() - 4 ); // go back 4 bytes, so that the magic bytes can be found... - } - else if ( buffer[0] == 'P' || buffer[1] == 'P' || buffer[2] == 'P' ) - { - // We have another P character so we must go back a little to check if it is a magic - dev->at( dev->at() - 3 ); - } - - } - } - else - { - // here we skip the compressed data and jump to the next header - kdDebug(7040) << "general purpose bit flag indicates, that local file header contains valid size" << endl; - // check if this could be a symbolic link - if (compression_mode == NoCompression - && uncomp_size <= max_path_len - && uncomp_size > 0) { - // read content and store it - pfi->guessed_symlink.resize(uncomp_size + 1); - kdDebug(7040) << "guessed symlink size: " << uncomp_size << endl; - n = dev->readBlock(pfi->guessed_symlink.data(), uncomp_size); - if (n < uncomp_size) { - kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. (#5)" << endl; - return false; - } - } else { - - if ( compr_size > (TQ_LONG)dev->size() ) - { - // here we cannot trust the compressed size, so scan through the compressed - // data to find the next header - bool foundSignature = false; - - while (!foundSignature) - { - n = dev->readBlock( buffer, 1 ); - if (n < 1) - { - kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. (#2)" << endl; - return false; - } - - if ( buffer[0] != 'P' ) - continue; - - n = dev->readBlock( buffer, 3 ); - if (n < 3) - { - kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. (#3)" << endl; - return false; - } - - // we have to detect three magic tokens here: - // PK34 for the next local header in case there is no data descriptor - // PK12 for the central header in case there is no data descriptor - // PK78 for the data descriptor in case it is following the compressed data - - if ( buffer[0] == 'K' && buffer[1] == 7 && buffer[2] == 8 ) - { - foundSignature = true; - dev->at( dev->at() + 12 ); // skip the 'data_descriptor' - } - - if ( ( buffer[0] == 'K' && buffer[1] == 1 && buffer[2] == 2 ) - || ( buffer[0] == 'K' && buffer[1] == 3 && buffer[2] == 4 ) ) - { - foundSignature = true; - dev->at( dev->at() - 4 ); - // go back 4 bytes, so that the magic bytes can be found - // in the next cycle... - } - } - } - else - { -// kdDebug(7040) << "before interesting dev->at(): " << dev->at() << endl; - bool success; - success = dev->at( dev->at() + compr_size ); // can this fail ??? -/* kdDebug(7040) << "after interesting dev->at(): " << dev->at() << endl; - if ( success ) - kdDebug(7040) << "dev->at was successful... " << endl; - else - kdDebug(7040) << "dev->at failed... " << endl;*/ - } - - } - -// not needed any more -/* // here we calculate the length of the file in the zip - // with headers and jump to the next header. - uint skip = compr_size + namelen + extralen; - offset += 30 + skip;*/ - } - } - else if ( !memcmp( buffer, "PK\1\2", 4 ) ) // central block - { - kdDebug(7040) << "PK12 found central block" << endl; - startOfFile = false; - - // so we reached the central header at the end of the zip file - // here we get all interesting data out of the central header - // of a file - offset = dev->at() - 4; - - //set offset for appending new files - if ( d->m_offset == 0L ) d->m_offset = offset; - - n = dev->readBlock( buffer + 4, 42 ); - if (n < 42) { - kdWarning(7040) << "Invalid ZIP file, central entry too short" << endl; // not long enough for valid entry - return false; - } - - //int gpf = (uchar)buffer[9] << 8 | (uchar)buffer[10]; - //kdDebug() << "general purpose flag=" << gpf << endl; - // length of the filename (well, pathname indeed) - int namelen = (uchar)buffer[29] << 8 | (uchar)buffer[28]; - TQCString bufferName( namelen + 1 ); - n = dev->readBlock( bufferName.data(), namelen ); - if ( n < namelen ) - kdWarning(7040) << "Invalid ZIP file. Name not completely read" << endl; - - ParseFileInfo *pfi = pfi_map[bufferName]; - if (!pfi) { // can that happen? - pfi_map.insert(bufferName.data(), pfi = new ParseFileInfo()); - } - TQString name( TQFile::decodeName(bufferName) ); - - //kdDebug(7040) << "name: " << name << endl; - // only in central header ! see below. - // length of extra attributes - int extralen = (uchar)buffer[31] << 8 | (uchar)buffer[30]; - // length of comment for this file - int commlen = (uchar)buffer[33] << 8 | (uchar)buffer[32]; - // compression method of this file - int cmethod = (uchar)buffer[11] << 8 | (uchar)buffer[10]; - - //kdDebug(7040) << "cmethod: " << cmethod << endl; - //kdDebug(7040) << "extralen: " << extralen << endl; - - // uncompressed file size - uint ucsize = (uchar)buffer[27] << 24 | (uchar)buffer[26] << 16 | - (uchar)buffer[25] << 8 | (uchar)buffer[24]; - // compressed file size - uint csize = (uchar)buffer[23] << 24 | (uchar)buffer[22] << 16 | - (uchar)buffer[21] << 8 | (uchar)buffer[20]; - - // offset of local header - uint localheaderoffset = (uchar)buffer[45] << 24 | (uchar)buffer[44] << 16 | - (uchar)buffer[43] << 8 | (uchar)buffer[42]; - - // some clever people use different extra field lengths - // in the central header and in the local header... funny. - // so we need to get the localextralen to calculate the offset - // from localheaderstart to dataoffset - int localextralen = pfi->extralen; // FIXME: this will not work if - // no local header exists - - //kdDebug(7040) << "localextralen: " << localextralen << endl; - - // offset, where the real data for uncompression starts - uint dataoffset = localheaderoffset + 30 + localextralen + namelen; //comment only in central header - - //kdDebug(7040) << "esize: " << esize << endl; - //kdDebug(7040) << "eoffset: " << eoffset << endl; - //kdDebug(7040) << "csize: " << csize << endl; - - int os_madeby = (uchar)buffer[5]; - bool isdir = false; - int access = 0100644; - - if (os_madeby == 3) { // good ole unix - access = (uchar)buffer[40] | (uchar)buffer[41] << 8; - } - - TQString entryName; - - if ( name.endsWith( "/" ) ) // Entries with a trailing slash are directories - { - isdir = true; - name = name.left( name.length() - 1 ); - if (os_madeby != 3) access = S_IFDIR | 0755; - else Q_ASSERT(access & S_IFDIR); - } - - int pos = name.findRev( '/' ); - if ( pos == -1 ) - entryName = name; - else - entryName = name.mid( pos + 1 ); - Q_ASSERT( !entryName.isEmpty() ); - - KArchiveEntry* entry; - if ( isdir ) - { - TQString path = TQDir::cleanDirPath( name ); - KArchiveEntry* ent = rootDir()->entry( path ); - if ( ent && ent->isDirectory() ) - { - //kdDebug(7040) << "Directory already exists, NOT going to add it again" << endl; - entry = 0L; - } - else - { - entry = new KArchiveDirectory( this, entryName, access, (int)pfi->mtime, rootDir()->user(), rootDir()->group(), TQString::null ); - //kdDebug(7040) << "KArchiveDirectory created, entryName= " << entryName << ", name=" << name << endl; - } - } - else - { - TQString symlink; - if (S_ISLNK(access)) { - symlink = TQFile::decodeName(pfi->guessed_symlink); - } - entry = new KZipFileEntry( this, entryName, access, pfi->mtime, - rootDir()->user(), rootDir()->group(), - symlink, name, dataoffset, - ucsize, cmethod, csize ); - static_cast<KZipFileEntry *>(entry)->setHeaderStart( localheaderoffset ); - //kdDebug(7040) << "KZipFileEntry created, entryName= " << entryName << ", name=" << name << endl; - d->m_fileList.append( static_cast<KZipFileEntry *>( entry ) ); - } - - if ( entry ) - { - if ( pos == -1 ) - { - rootDir()->addEntry(entry); - } - else - { - // In some tar files we can find dir/./file => call cleanDirPath - TQString path = TQDir::cleanDirPath( name.left( pos ) ); - // Ensure container directory exists, create otherwise - KArchiveDirectory * tdir = findOrCreate( path ); - tdir->addEntry(entry); - } - } - - //calculate offset to next entry - offset += 46 + commlen + extralen + namelen; - bool b = dev->at(offset); - Q_ASSERT( b ); - if ( !b ) - return false; - } - else if ( startOfFile ) - { - // The file does not start with any ZIP header (e.g. self-extractable ZIP files) - // Therefore we need to find the first PK\003\004 (local header) - kdDebug(7040) << "Try to skip start of file" << endl; - startOfFile = false; - bool foundSignature = false; - - while (!foundSignature) - { - n = dev->readBlock( buffer, 1 ); - if (n < 1) - { - kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. " << k_funcinfo << endl; - return false; - } - - if ( buffer[0] != 'P' ) - continue; - - n = dev->readBlock( buffer, 3 ); - if (n < 3) - { - kdWarning(7040) << "Invalid ZIP file. Unexpected end of file. " << k_funcinfo << endl; - return false; - } - - // We have to detect the magic token for a local header: PK\003\004 - /* - * Note: we do not need to check the other magics, if the ZIP file has no - * local header, then it has not any files! - */ - if ( buffer[0] == 'K' && buffer[1] == 3 && buffer[2] == 4 ) - { - foundSignature = true; - dev->at( dev->at() - 4 ); // go back 4 bytes, so that the magic bytes can be found... - } - else if ( buffer[0] == 'P' || buffer[1] == 'P' || buffer[2] == 'P' ) - { - // We have another P character so we must go back a little to check if it is a magic - dev->at( dev->at() - 3 ); - } - } - } - else - { - kdWarning(7040) << "Invalid ZIP file. Unrecognized header at offset " << offset << endl; - - return false; - } - } - //kdDebug(7040) << "*** done *** " << endl; - return true; -} - -bool KZip::closeArchive() -{ - if ( ! ( mode() & IO_WriteOnly ) ) - { - //kdDebug(7040) << "closearchive readonly reached." << endl; - return true; - } - - kdDebug() << k_funcinfo << "device=" << device() << endl; - //ReadWrite or WriteOnly - //write all central dir file entries - - if ( !device() ) // saving aborted - return false; - - // to be written at the end of the file... - char buffer[ 22 ]; // first used for 12, then for 22 at the end - uLong crc = crc32(0L, Z_NULL, 0); - - TQ_LONG centraldiroffset = device()->at(); - //kdDebug(7040) << "closearchive: centraldiroffset: " << centraldiroffset << endl; - TQ_LONG atbackup = centraldiroffset; - TQPtrListIterator<KZipFileEntry> it( d->m_fileList ); - - for ( ; it.current() ; ++it ) - { //set crc and compressed size in each local file header - if ( !device()->at( it.current()->headerStart() + 14 ) ) - return false; - //kdDebug(7040) << "closearchive setcrcandcsize: filename: " - // << it.current()->path() - // << " encoding: "<< it.current()->encoding() << endl; - - uLong mycrc = it.current()->crc32(); - buffer[0] = char(mycrc); // crc checksum, at headerStart+14 - buffer[1] = char(mycrc >> 8); - buffer[2] = char(mycrc >> 16); - buffer[3] = char(mycrc >> 24); - - int mysize1 = it.current()->compressedSize(); - buffer[4] = char(mysize1); // compressed file size, at headerStart+18 - buffer[5] = char(mysize1 >> 8); - buffer[6] = char(mysize1 >> 16); - buffer[7] = char(mysize1 >> 24); - - int myusize = it.current()->size(); - buffer[8] = char(myusize); // uncompressed file size, at headerStart+22 - buffer[9] = char(myusize >> 8); - buffer[10] = char(myusize >> 16); - buffer[11] = char(myusize >> 24); - - if ( device()->writeBlock( buffer, 12 ) != 12 ) - return false; - } - device()->at( atbackup ); - - for ( it.toFirst(); it.current() ; ++it ) - { - //kdDebug(7040) << "closearchive: filename: " << it.current()->path() - // << " encoding: "<< it.current()->encoding() << endl; - - TQCString path = TQFile::encodeName(it.current()->path()); - - const int extra_field_len = 9; - int bufferSize = extra_field_len + path.length() + 46; - char* buffer = new char[ bufferSize ]; - - memset(buffer, 0, 46); // zero is a nice default for most header fields - - const char head[] = - { - 'P', 'K', 1, 2, // central file header signature - 0x14, 3, // version made by (3 == UNIX) - 0x14, 0 // version needed to extract - }; - - // I do not know why memcpy is not working here - //memcpy(buffer, head, sizeof(head)); - tqmemmove(buffer, head, sizeof(head)); - - buffer[ 10 ] = char(it.current()->encoding()); // compression method - buffer[ 11 ] = char(it.current()->encoding() >> 8); - - transformToMsDos( it.current()->datetime(), &buffer[ 12 ] ); - - uLong mycrc = it.current()->crc32(); - buffer[ 16 ] = char(mycrc); // crc checksum - buffer[ 17 ] = char(mycrc >> 8); - buffer[ 18 ] = char(mycrc >> 16); - buffer[ 19 ] = char(mycrc >> 24); - - int mysize1 = it.current()->compressedSize(); - buffer[ 20 ] = char(mysize1); // compressed file size - buffer[ 21 ] = char(mysize1 >> 8); - buffer[ 22 ] = char(mysize1 >> 16); - buffer[ 23 ] = char(mysize1 >> 24); - - int mysize = it.current()->size(); - buffer[ 24 ] = char(mysize); // uncompressed file size - buffer[ 25 ] = char(mysize >> 8); - buffer[ 26 ] = char(mysize >> 16); - buffer[ 27 ] = char(mysize >> 24); - - buffer[ 28 ] = char(it.current()->path().length()); // filename length - buffer[ 29 ] = char(it.current()->path().length() >> 8); - - buffer[ 30 ] = char(extra_field_len); - buffer[ 31 ] = char(extra_field_len >> 8); - - buffer[ 40 ] = char(it.current()->permissions()); - buffer[ 41 ] = char(it.current()->permissions() >> 8); - - int myhst = it.current()->headerStart(); - buffer[ 42 ] = char(myhst); //relative offset of local header - buffer[ 43 ] = char(myhst >> 8); - buffer[ 44 ] = char(myhst >> 16); - buffer[ 45 ] = char(myhst >> 24); - - // file name - strncpy( buffer + 46, path, path.length() ); - //kdDebug(7040) << "closearchive length to write: " << bufferSize << endl; - - // extra field - char *extfield = buffer + 46 + path.length(); - extfield[0] = 'U'; - extfield[1] = 'T'; - extfield[2] = 5; - extfield[3] = 0; - extfield[4] = 1 | 2 | 4; // specify flags from local field - // (unless I misread the spec) - // provide only modification time - unsigned long time = (unsigned long)it.current()->date(); - extfield[5] = char(time); - extfield[6] = char(time >> 8); - extfield[7] = char(time >> 16); - extfield[8] = char(time >> 24); - - crc = crc32(crc, (Bytef *)buffer, bufferSize ); - bool ok = ( device()->writeBlock( buffer, bufferSize ) == bufferSize ); - delete[] buffer; - if ( !ok ) - return false; - } - TQ_LONG centraldirendoffset = device()->at(); - //kdDebug(7040) << "closearchive: centraldirendoffset: " << centraldirendoffset << endl; - //kdDebug(7040) << "closearchive: device()->at(): " << device()->at() << endl; - - //write end of central dir record. - buffer[ 0 ] = 'P'; //end of central dir signature - buffer[ 1 ] = 'K'; - buffer[ 2 ] = 5; - buffer[ 3 ] = 6; - - buffer[ 4 ] = 0; // number of this disk - buffer[ 5 ] = 0; - - buffer[ 6 ] = 0; // number of disk with start of central dir - buffer[ 7 ] = 0; - - int count = d->m_fileList.count(); - //kdDebug(7040) << "number of files (count): " << count << endl; - - - buffer[ 8 ] = char(count); // total number of entries in central dir of - buffer[ 9 ] = char(count >> 8); // this disk - - buffer[ 10 ] = buffer[ 8 ]; // total number of entries in the central dir - buffer[ 11 ] = buffer[ 9 ]; - - int cdsize = centraldirendoffset - centraldiroffset; - buffer[ 12 ] = char(cdsize); // size of the central dir - buffer[ 13 ] = char(cdsize >> 8); - buffer[ 14 ] = char(cdsize >> 16); - buffer[ 15 ] = char(cdsize >> 24); - - //kdDebug(7040) << "end : centraldiroffset: " << centraldiroffset << endl; - //kdDebug(7040) << "end : centraldirsize: " << cdsize << endl; - - buffer[ 16 ] = char(centraldiroffset); // central dir offset - buffer[ 17 ] = char(centraldiroffset >> 8); - buffer[ 18 ] = char(centraldiroffset >> 16); - buffer[ 19 ] = char(centraldiroffset >> 24); - - buffer[ 20 ] = 0; //zipfile comment length - buffer[ 21 ] = 0; - - if ( device()->writeBlock( buffer, 22 ) != 22 ) - return false; - - if ( d->m_saveFile ) { - d->m_saveFile->close(); - setDevice( 0 ); - delete d->m_saveFile; - d->m_saveFile = 0; - } - - //kdDebug(7040) << __FILE__" reached." << endl; - return true; -} - -// Doesn't need to be reimplemented anymore. Remove for KDE-4.0 -bool KZip::writeFile( const TQString& name, const TQString& user, const TQString& group, uint size, const char* data ) -{ - mode_t mode = 0100644; - time_t the_time = time(0); - return KArchive::writeFile( name, user, group, size, mode, the_time, - the_time, the_time, data ); -} - -// Doesn't need to be reimplemented anymore. Remove for KDE-4.0 -bool KZip::writeFile( const TQString& name, const TQString& user, - const TQString& group, uint size, mode_t perm, - time_t atime, time_t mtime, time_t ctime, - const char* data ) { - return KArchive::writeFile(name, user, group, size, perm, atime, mtime, - ctime, data); -} - -// Doesn't need to be reimplemented anymore. Remove for KDE-4.0 -bool KZip::prepareWriting( const TQString& name, const TQString& user, const TQString& group, uint size ) -{ - mode_t dflt_perm = 0100644; - time_t the_time = time(0); - return prepareWriting(name,user,group,size,dflt_perm, - the_time,the_time,the_time); -} - -// Doesn't need to be reimplemented anymore. Remove for KDE-4.0 -bool KZip::prepareWriting(const TQString& name, const TQString& user, - const TQString& group, uint size, mode_t perm, - time_t atime, time_t mtime, time_t ctime) { - return KArchive::prepareWriting(name,user,group,size,perm,atime,mtime,ctime); -} - -bool KZip::prepareWriting_impl(const TQString &name, const TQString &user, - const TQString &group, uint /*size*/, mode_t perm, - time_t atime, time_t mtime, time_t ctime) { - //kdDebug(7040) << "prepareWriting reached." << endl; - if ( !isOpened() ) - { - tqWarning( "KZip::writeFile: You must open the zip file before writing to it\n"); - return false; - } - - if ( ! ( mode() & IO_WriteOnly ) ) // accept WriteOnly and ReadWrite - { - tqWarning( "KZip::writeFile: You must open the zip file for writing\n"); - return false; - } - - if ( !device() ) { // aborted - //kdWarning(7040) << "prepareWriting_impl: no device" << endl; - return false; - } - - // set right offset in zip. - if ( !device()->at( d->m_offset ) ) { - kdWarning(7040) << "prepareWriting_impl: cannot seek in ZIP file. Disk full?" << endl; - abort(); - return false; - } - - // delete entries in the filelist with the same filename as the one we want - // to save, so that we don�t have duplicate file entries when viewing the zip - // with konqi... - // CAUTION: the old file itself is still in the zip and won't be removed !!! - TQPtrListIterator<KZipFileEntry> it( d->m_fileList ); - - //kdDebug(7040) << "filename to write: " << name <<endl; - for ( ; it.current() ; ++it ) - { - //kdDebug(7040) << "prepfilename: " << it.current()->path() <<endl; - if (name == it.current()->path() ) - { - //kdDebug(7040) << "removing following entry: " << it.current()->path() <<endl; - d->m_fileList.remove(); - } - - } - // Find or create parent dir - KArchiveDirectory* parentDir = rootDir(); - TQString fileName( name ); - int i = name.findRev( '/' ); - if ( i != -1 ) - { - TQString dir = name.left( i ); - fileName = name.mid( i + 1 ); - //kdDebug(7040) << "KZip::prepareWriting ensuring " << dir << " exists. fileName=" << fileName << endl; - parentDir = findOrCreate( dir ); - } - - // construct a KZipFileEntry and add it to list - KZipFileEntry * e = new KZipFileEntry( this, fileName, perm, mtime, user, group, TQString::null, - name, device()->at() + 30 + name.length(), // start - 0 /*size unknown yet*/, d->m_compression, 0 /*csize unknown yet*/ ); - e->setHeaderStart( device()->at() ); - //kdDebug(7040) << "wrote file start: " << e->position() << " name: " << name << endl; - parentDir->addEntry( e ); - - d->m_currentFile = e; - d->m_fileList.append( e ); - - int extra_field_len = 0; - if ( d->m_extraField == ModificationTime ) - extra_field_len = 17; // value also used in doneWriting() - - // write out zip header - TQCString encodedName = TQFile::encodeName(name); - int bufferSize = extra_field_len + encodedName.length() + 30; - //kdDebug(7040) << "KZip::prepareWriting bufferSize=" << bufferSize << endl; - char* buffer = new char[ bufferSize ]; - - buffer[ 0 ] = 'P'; //local file header signature - buffer[ 1 ] = 'K'; - buffer[ 2 ] = 3; - buffer[ 3 ] = 4; - - buffer[ 4 ] = 0x14; // version needed to extract - buffer[ 5 ] = 0; - - buffer[ 6 ] = 0; // general purpose bit flag - buffer[ 7 ] = 0; - - buffer[ 8 ] = char(e->encoding()); // compression method - buffer[ 9 ] = char(e->encoding() >> 8); - - transformToMsDos( e->datetime(), &buffer[ 10 ] ); - - buffer[ 14 ] = 'C'; //dummy crc - buffer[ 15 ] = 'R'; - buffer[ 16 ] = 'C'; - buffer[ 17 ] = 'q'; - - buffer[ 18 ] = 'C'; //compressed file size - buffer[ 19 ] = 'S'; - buffer[ 20 ] = 'I'; - buffer[ 21 ] = 'Z'; - - buffer[ 22 ] = 'U'; //uncompressed file size - buffer[ 23 ] = 'S'; - buffer[ 24 ] = 'I'; - buffer[ 25 ] = 'Z'; - - buffer[ 26 ] = (uchar)(encodedName.length()); //filename length - buffer[ 27 ] = (uchar)(encodedName.length() >> 8); - - buffer[ 28 ] = (uchar)(extra_field_len); // extra field length - buffer[ 29 ] = (uchar)(extra_field_len >> 8); - - // file name - strncpy( buffer + 30, encodedName, encodedName.length() ); - - // extra field - if ( d->m_extraField == ModificationTime ) - { - char *extfield = buffer + 30 + encodedName.length(); - // "Extended timestamp" header (0x5455) - extfield[0] = 'U'; - extfield[1] = 'T'; - extfield[2] = 13; // data size - extfield[3] = 0; - extfield[4] = 1 | 2 | 4; // contains mtime, atime, ctime - - extfield[5] = char(mtime); - extfield[6] = char(mtime >> 8); - extfield[7] = char(mtime >> 16); - extfield[8] = char(mtime >> 24); - - extfield[9] = char(atime); - extfield[10] = char(atime >> 8); - extfield[11] = char(atime >> 16); - extfield[12] = char(atime >> 24); - - extfield[13] = char(ctime); - extfield[14] = char(ctime >> 8); - extfield[15] = char(ctime >> 16); - extfield[16] = char(ctime >> 24); - } - - // Write header - bool b = (device()->writeBlock( buffer, bufferSize ) == bufferSize ); - d->m_crc = 0L; - delete[] buffer; - - Q_ASSERT( b ); - if (!b) { - abort(); - return false; - } - - // Prepare device for writing the data - // Either device() if no compression, or a KFilterDev to compress - if ( d->m_compression == 0 ) { - d->m_currentDev = device(); - return true; - } - - d->m_currentDev = KFilterDev::device( device(), "application/x-gzip", false ); - Q_ASSERT( d->m_currentDev ); - if ( !d->m_currentDev ) { - abort(); - return false; // ouch - } - static_cast<KFilterDev *>(d->m_currentDev)->setSkipHeaders(); // Just zlib, not gzip - - b = d->m_currentDev->open( IO_WriteOnly ); - Q_ASSERT( b ); - return b; -} - -bool KZip::doneWriting( uint size ) -{ - if ( d->m_currentFile->encoding() == 8 ) { - // Finish - (void)d->m_currentDev->writeBlock( 0, 0 ); - delete d->m_currentDev; - } - // If 0, d->m_currentDev was device() - don't delete ;) - d->m_currentDev = 0L; - - Q_ASSERT( d->m_currentFile ); - //kdDebug(7040) << "donewriting reached." << endl; - //kdDebug(7040) << "filename: " << d->m_currentFile->path() << endl; - //kdDebug(7040) << "getpos (at): " << device()->at() << endl; - d->m_currentFile->setSize(size); - int extra_field_len = 0; - if ( d->m_extraField == ModificationTime ) - extra_field_len = 17; // value also used in doneWriting() - - int csize = device()->at() - - d->m_currentFile->headerStart() - 30 - - d->m_currentFile->path().length() - extra_field_len; - d->m_currentFile->setCompressedSize(csize); - //kdDebug(7040) << "usize: " << d->m_currentFile->size() << endl; - //kdDebug(7040) << "csize: " << d->m_currentFile->compressedSize() << endl; - //kdDebug(7040) << "headerstart: " << d->m_currentFile->headerStart() << endl; - - //kdDebug(7040) << "crc: " << d->m_crc << endl; - d->m_currentFile->setCRC32( d->m_crc ); - - d->m_currentFile = 0L; - - // update saved offset for appending new files - d->m_offset = device()->at(); - return true; -} - -bool KZip::writeSymLink(const TQString &name, const TQString &target, - const TQString &user, const TQString &group, - mode_t perm, time_t atime, time_t mtime, time_t ctime) { - return KArchive::writeSymLink(name,target,user,group,perm,atime,mtime,ctime); -} - -bool KZip::writeSymLink_impl(const TQString &name, const TQString &target, - const TQString &user, const TQString &group, - mode_t perm, time_t atime, time_t mtime, time_t ctime) { - - // reassure that symlink flag is set, otherwise strange things happen on - // extraction - perm |= S_IFLNK; - Compression c = compression(); - setCompression(NoCompression); // link targets are never compressed - - if (!prepareWriting(name, user, group, 0, perm, atime, mtime, ctime)) { - kdWarning() << "KZip::writeFile prepareWriting failed" << endl; - setCompression(c); - return false; - } - - TQCString symlink_target = TQFile::encodeName(target); - if (!writeData(symlink_target, symlink_target.length())) { - kdWarning() << "KZip::writeFile writeData failed" << endl; - setCompression(c); - return false; - } - - if (!doneWriting(symlink_target.length())) { - kdWarning() << "KZip::writeFile doneWriting failed" << endl; - setCompression(c); - return false; - } - - setCompression(c); - return true; -} - -void KZip::virtual_hook( int id, void* data ) -{ - switch (id) { - case VIRTUAL_WRITE_DATA: { - WriteDataParams* params = reinterpret_cast<WriteDataParams *>(data); - params->retval = writeData_impl( params->data, params->size ); - break; - } - case VIRTUAL_WRITE_SYMLINK: { - WriteSymlinkParams *params = reinterpret_cast<WriteSymlinkParams *>(data); - params->retval = writeSymLink_impl(*params->name,*params->target, - *params->user,*params->group,params->perm, - params->atime,params->mtime,params->ctime); - break; - } - case VIRTUAL_PREPARE_WRITING: { - PrepareWritingParams *params = reinterpret_cast<PrepareWritingParams *>(data); - params->retval = prepareWriting_impl(*params->name,*params->user, - *params->group,params->size,params->perm, - params->atime,params->mtime,params->ctime); - break; - } - default: - KArchive::virtual_hook( id, data ); - }/*end switch*/ -} - -// made virtual using virtual_hook -bool KZip::writeData(const char * c, uint i) -{ - return KArchive::writeData( c, i ); -} - -bool KZip::writeData_impl(const char * c, uint i) -{ - Q_ASSERT( d->m_currentFile ); - Q_ASSERT( d->m_currentDev ); - if (!d->m_currentFile || !d->m_currentDev) { - abort(); - return false; - } - - // crc to be calculated over uncompressed stuff... - // and they didn't mention it in their docs... - d->m_crc = crc32(d->m_crc, (const Bytef *) c , i); - - TQ_LONG written = d->m_currentDev->writeBlock( c, i ); - //kdDebug(7040) << "KZip::writeData wrote " << i << " bytes." << endl; - bool ok = written == (TQ_LONG)i; - if ( !ok ) - abort(); - return ok; -} - -void KZip::setCompression( Compression c ) -{ - d->m_compression = ( c == NoCompression ) ? 0 : 8; -} - -KZip::Compression KZip::compression() const -{ - return ( d->m_compression == 8 ) ? DeflateCompression : NoCompression; -} - -void KZip::setExtraField( ExtraField ef ) -{ - d->m_extraField = ef; -} - -KZip::ExtraField KZip::extraField() const -{ - return d->m_extraField; -} - -void KZip::abort() -{ - if ( d->m_saveFile ) { - d->m_saveFile->abort(); - setDevice( 0 ); - } -} - - -/////////////// - -TQByteArray KZipFileEntry::data() const -{ - TQIODevice* dev = device(); - TQByteArray arr; - if ( dev ) { - arr = dev->readAll(); - delete dev; - } - return arr; -} - -TQIODevice* KZipFileEntry::device() const -{ - //kdDebug(7040) << "KZipFileEntry::device creating iodevice limited to pos=" << position() << ", csize=" << compressedSize() << endl; - // Limit the reading to the appropriate part of the underlying device (e.g. file) - KLimitedIODevice* limitedDev = new KLimitedIODevice( archive()->device(), position(), compressedSize() ); - if ( encoding() == 0 || compressedSize() == 0 ) // no compression (or even no data) - return limitedDev; - - if ( encoding() == 8 ) - { - // On top of that, create a device that uncompresses the zlib data - TQIODevice* filterDev = KFilterDev::device( limitedDev, "application/x-gzip" ); - if ( !filterDev ) - return 0L; // ouch - static_cast<KFilterDev *>(filterDev)->setSkipHeaders(); // Just zlib, not gzip - bool b = filterDev->open( IO_ReadOnly ); - Q_ASSERT( b ); - return filterDev; - } - - kdError() << "This zip file contains files compressed with method " - << encoding() <<", this method is currently not supported by KZip," - <<" please use a command-line tool to handle this file." << endl; - return 0L; -} |