159 lines
4.0 KiB
C
159 lines
4.0 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* $XConsortium: zip.cc /main/3 1996/06/11 17:15:36 cde-hal $
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*
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* Copyright (c) 1993 HAL Computer Systems International, Ltd.
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* All rights reserved. Unpublished -- rights reserved under
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* the Copyright Laws of the United States. USE OF A COPYRIGHT
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* NOTICE IS PRECAUTIONARY ONLY AND DOES NOT IMPLY PUBLICATION
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* OR DISCLOSURE.
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*
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* THIS SOFTWARE CONTAINS CONFIDENTIAL INFORMATION AND TRADE
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* SECRETS OF HAL COMPUTER SYSTEMS INTERNATIONAL, LTD. USE,
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* DISCLOSURE, OR REPRODUCTION IS PROHIBITED WITHOUT THE
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* PRIOR EXPRESS WRITTEN PERMISSION OF HAL COMPUTER SYSTEMS
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* INTERNATIONAL, LTD.
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*
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* RESTRICTED RIGHTS LEGEND
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* Use, duplication, or disclosure by the Government is subject
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* to the restrictions as set forth in subparagraph (c)(l)(ii)
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* of the Rights in Technical Data and Computer Software clause
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* at DFARS 252.227-7013.
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*
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* HAL COMPUTER SYSTEMS INTERNATIONAL, LTD.
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* 1315 Dell Avenue
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* Campbell, CA 95008
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*
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*/
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#include "compression/zip.h"
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//zip g_zip_agent;
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#define UNCOMPRESSED "/tmp/uncomp"
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#define COMPRESSED "/tmp/comp"
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void zip::compress(const buffer& uncompressed, buffer& compressed)
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{
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////////////////////////////////////////
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// code for testing. I know it is slow.
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////////////////////////////////////////
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int ret;
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fstream out(UNCOMPRESSED, ios::out|ios::trunc);
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if ( !out )
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throw(streamException(out.rdstate()));
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out.write(uncompressed.get_base(), uncompressed.content_sz());
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if ( out.bad() )
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throw(streamException(out.rdstate()));
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out.close();
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ret = system(form("gzip -c %s > %s", (char*)UNCOMPRESSED,(char*)COMPRESSED));
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if(ret != 0) throw(systemException(ret));
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fstream in(COMPRESSED, ios::in);
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if ( !in )
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throw(streamException(in.rdstate()));
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int x = bytes((char*)COMPRESSED);
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compressed.expand_chunk(x);
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in.read(compressed.get_base(), x);
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if ( in.bad() || x != in.gcount() )
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throw(streamException(in.rdstate()));
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compressed.set_content_sz(x);
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in.close();
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return;
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}
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void zip::decompress(buffer& compressed, buffer& uncompressed)
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{
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int ret;
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fstream out(COMPRESSED, ios::out|ios::trunc);
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if ( !out )
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throw(streamException(out.rdstate()));
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out.write(compressed.get_base(), compressed.content_sz());
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if ( out.bad() )
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throw(streamException(out.rdstate()));
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out.close();
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ret = system(form("gzip -cd %s > %s",(char*)COMPRESSED,(char*)UNCOMPRESSED));
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if(ret != 0) throw(systemException(ret));
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fstream in(UNCOMPRESSED, ios::in);
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if ( !in )
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throw(streamException(in.rdstate()));
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int x = bytes((char*)UNCOMPRESSED);
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uncompressed.expand_chunk(x);
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in.read(uncompressed.get_base(), x);
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if ( in.bad() || x != in.gcount() )
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throw(streamException(in.rdstate()));
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uncompressed.set_content_sz(x);
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in.close();
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return;
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}
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io_status zip::build_dict(lex_func_t, getchar_func_t)
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{
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return done;
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}
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MMDB_BODIES(zip)
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int zip::cdr_sizeof()
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{
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return 0;
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}
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io_status zip::cdrOut(buffer&)
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{
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return done;
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}
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io_status zip::cdrIn(buffer&)
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{
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return done;
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}
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