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Diffstat (limited to 'kdat/TarParser.cpp')
| -rw-r--r-- | kdat/TarParser.cpp | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/kdat/TarParser.cpp b/kdat/TarParser.cpp new file mode 100644 index 0000000..4529d64 --- /dev/null +++ b/kdat/TarParser.cpp @@ -0,0 +1,117 @@ +// KDat - a tar-based DAT archiver +// Copyright (C) 1998-2000 Sean Vyain, svyain@mail.tds.net +// Copyright (C) 2001-2002 Lawrence Widman, kdat@cardiothink.com +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation; either version 2 of the License, or +// (at your option) any later version. +// +// This program 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 General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + +#include "TarParser.h" + +#include "TarParser.moc" + +TarParser::TarParser() + : _bufIdx( 0 ), + _blocksToSkip( 0 ), + _record( 0 ), + _longname( FALSE ), + _extended( FALSE ), + _archnameIdx( 0 ) +{ +} + +void TarParser::slotData( const char * data, int length ) +{ + for ( int i = 0; i < length; i++ ) { + if ( _bufIdx >= 512 ) { + if ( _blocksToSkip > 0 ) { + if ( _extended ) { + record* rec = (record*)_buf; + _extended = rec->ext_hdr.isextended; + } else { + _blocksToSkip--; + if ( _longname ) { + memcpy( _archname + _archnameIdx, _buf, 512 ); + _archnameIdx += 512; + } + } + } else { + parseTarBlock(); + } + _bufIdx = 0; + _record++; + } + _buf[_bufIdx++] = data[i]; + } +} + +int TarParser::parseOctal( const char* buf, int length ) +{ + int val = 0; + + for ( int i = 0; i < length; i++ ) { + val *= 8; + if ( ( buf[i] >= '1' ) && ( buf[i] <= '7' ) ) { + val += buf[i] - '0'; + } + } + + return val; +} + +void TarParser::parseTarBlock() +{ + record* rec = (record*)_buf; + +#if 0 + printf( "----- parsing tar block -----\n" ); + printf( "arch_name = '%s'\n", rec->header.arch_name ); + printf( "mode = '%s'\n", rec->header.mode ); + printf( "uid = %d\n", parseOctal( rec->header.uid, 6 ) ); + printf( "gid = %d\n", parseOctal( rec->header.gid, 6 ) ); + printf( "size = %d\n", parseOctal( rec->header.size, 11 ) ); + printf( "mtime = %d\n", parseOctal( rec->header.mtime, 11 ) ); + printf( "chksum = '%s'\n", rec->header.chksum ); + printf( "linkflag = '%c'\n", rec->header.linkflag ); + printf( "arch_linkname = '%s'\n", rec->header.arch_linkname ); + printf( "magic = '%s'\n", rec->header.magic ); + printf( "uname = '%s'\n", rec->header.uname ); + printf( "gname = '%s'\n", rec->header.gname ); + printf( "devmajor = %d\n", parseOctal( rec->header.devmajor, 8 ) ); + printf( "devminor = %d\n", parseOctal( rec->header.devminor, 8 ) ); + printf( "atime = %d\n", parseOctal( rec->header.atime, 11 ) ); + printf( "ctime = %d\n", parseOctal( rec->header.ctime, 11 ) ); + printf( "offset = %d\n", parseOctal( rec->header.offset, 11 ) ); + printf( "longnames = '%s'\n", rec->header.longnames ); + printf( "isextended = %d\n", rec->header.isextended ); + printf( "realsize = %d\n", parseOctal( rec->header.realsize, 11 ) ); +#endif + + if ( rec->header.magic[0] != 0 ) { + _blocksToSkip = ( parseOctal( rec->header.size, 11 ) + 511 ) / 512; + _extended = rec->header.isextended; + + if ( rec->header.linkflag == LF_LONGNAME ) { + // The actual file name is stored in the next _blocksToSkip blocks of the tar-file. + _longname = TRUE; + _archnameIdx = 0; + } else { + if ( _longname ) { + _longname = FALSE; + emit sigEntry( _archname, parseOctal( rec->header.size, 11 ), parseOctal( rec->header.mtime, 11 ), _record ); + } else { + emit sigEntry( rec->header.arch_name, parseOctal( rec->header.size, 11 ), parseOctal( rec->header.mtime, 11 ), _record ); + } + } + } +} |