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118 lines
4.3 KiB
118 lines
4.3 KiB
// KDat - a tar-based DAT archiver
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// Copyright (C) 1998-2000 Sean Vyain, svyain@mail.tds.net
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// Copyright (C) 2001-2002 Lawrence Widman, kdat@cardiothink.com
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program 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
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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#include "TarParser.h"
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#include "TarParser.moc"
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TarParser::TarParser()
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: _bufIdx( 0 ),
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_blocksToSkip( 0 ),
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_record( 0 ),
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_longname( FALSE ),
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_extended( FALSE ),
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_archnameIdx( 0 )
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{
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}
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void TarParser::slotData( const char * data, int length )
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{
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for ( int i = 0; i < length; i++ ) {
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if ( _bufIdx >= 512 ) {
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if ( _blocksToSkip > 0 ) {
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if ( _extended ) {
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record* rec = (record*)_buf;
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_extended = rec->ext_hdr.isextended;
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} else {
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_blocksToSkip--;
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if ( _longname ) {
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memcpy( _archname + _archnameIdx, _buf, 512 );
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_archnameIdx += 512;
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}
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}
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} else {
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parseTarBlock();
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}
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_bufIdx = 0;
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_record++;
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}
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_buf[_bufIdx++] = data[i];
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}
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}
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int TarParser::parseOctal( const char* buf, int length )
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{
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int val = 0;
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for ( int i = 0; i < length; i++ ) {
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val *= 8;
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if ( ( buf[i] >= '1' ) && ( buf[i] <= '7' ) ) {
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val += buf[i] - '0';
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}
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}
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return val;
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}
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void TarParser::parseTarBlock()
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{
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record* rec = (record*)_buf;
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#if 0
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printf( "----- parsing tar block -----\n" );
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printf( "arch_name = '%s'\n", rec->header.arch_name );
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printf( "mode = '%s'\n", rec->header.mode );
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printf( "uid = %d\n", parseOctal( rec->header.uid, 6 ) );
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printf( "gid = %d\n", parseOctal( rec->header.gid, 6 ) );
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printf( "size = %d\n", parseOctal( rec->header.size, 11 ) );
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printf( "mtime = %d\n", parseOctal( rec->header.mtime, 11 ) );
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printf( "chksum = '%s'\n", rec->header.chksum );
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printf( "linkflag = '%c'\n", rec->header.linkflag );
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printf( "arch_linkname = '%s'\n", rec->header.arch_linkname );
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printf( "magic = '%s'\n", rec->header.magic );
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printf( "uname = '%s'\n", rec->header.uname );
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printf( "gname = '%s'\n", rec->header.gname );
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printf( "devmajor = %d\n", parseOctal( rec->header.devmajor, 8 ) );
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printf( "devminor = %d\n", parseOctal( rec->header.devminor, 8 ) );
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printf( "atime = %d\n", parseOctal( rec->header.atime, 11 ) );
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printf( "ctime = %d\n", parseOctal( rec->header.ctime, 11 ) );
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printf( "offset = %d\n", parseOctal( rec->header.offset, 11 ) );
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printf( "longnames = '%s'\n", rec->header.longnames );
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printf( "isextended = %d\n", rec->header.isextended );
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printf( "realsize = %d\n", parseOctal( rec->header.realsize, 11 ) );
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#endif
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if ( rec->header.magic[0] != 0 ) {
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_blocksToSkip = ( parseOctal( rec->header.size, 11 ) + 511 ) / 512;
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_extended = rec->header.isextended;
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if ( rec->header.linkflag == LF_LONGNAME ) {
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// The actual file name is stored in the next _blocksToSkip blocks of the tar-file.
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_longname = TRUE;
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_archnameIdx = 0;
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} else {
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if ( _longname ) {
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_longname = FALSE;
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emit sigEntry( _archname, parseOctal( rec->header.size, 11 ), parseOctal( rec->header.mtime, 11 ), _record );
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} else {
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emit sigEntry( rec->header.arch_name, parseOctal( rec->header.size, 11 ), parseOctal( rec->header.mtime, 11 ), _record );
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}
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}
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}
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}
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