Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/dtinfo/DtMmdb/compression/zip.C

@@ -0,0 +1,128 @@
+/*
+ * $XConsortium: zip.cc /main/3 1996/06/11 17:15:36 cde-hal $
+ *
+ * Copyright (c) 1993 HAL Computer Systems International, Ltd.
+ * All rights reserved.  Unpublished -- rights reserved under
+ * the Copyright Laws of the United States.  USE OF A COPYRIGHT
+ * NOTICE IS PRECAUTIONARY ONLY AND DOES NOT IMPLY PUBLICATION
+ * OR DISCLOSURE.
+ * 
+ * THIS SOFTWARE CONTAINS CONFIDENTIAL INFORMATION AND TRADE
+ * SECRETS OF HAL COMPUTER SYSTEMS INTERNATIONAL, LTD.  USE,
+ * DISCLOSURE, OR REPRODUCTION IS PROHIBITED WITHOUT THE
+ * PRIOR EXPRESS WRITTEN PERMISSION OF HAL COMPUTER SYSTEMS
+ * INTERNATIONAL, LTD.
+ * 
+ *                         RESTRICTED RIGHTS LEGEND
+ * Use, duplication, or disclosure by the Government is subject
+ * to the restrictions as set forth in subparagraph (c)(l)(ii)
+ * of the Rights in Technical Data and Computer Software clause
+ * at DFARS 252.227-7013.
+ *
+ *          HAL COMPUTER SYSTEMS INTERNATIONAL, LTD.
+ *                  1315 Dell Avenue
+ *                  Campbell, CA  95008
+ * 
+ */
+
+
+#include "compression/zip.h"
+
+//zip g_zip_agent;
+
+#define UNCOMPRESSED	"/tmp/uncomp"
+#define COMPRESSED	"/tmp/comp"
+
+void zip::compress(const buffer& uncompressed, buffer& compressed) 
+{
+////////////////////////////////////////
+// code for testing. I know it is slow. 
+////////////////////////////////////////
+
+   fstream out(UNCOMPRESSED, ios::out|ios::trunc);
+
+   if ( !out )
+      throw(streamException(out.rdstate()));
+
+   if ( out.write(uncompressed.get_base(), uncompressed.content_sz()) == 0 )
+      throw(streamException(out.rdstate()));
+
+   out.close();
+
+   system(form("gzip -c %s > %s", UNCOMPRESSED, COMPRESSED));
+
+   fstream in(COMPRESSED, ios::in);
+
+   if ( !in )
+      throw(streamException(in.rdstate()));
+
+   int x = bytes(in);
+
+   compressed.expand_chunk(x);
+
+   if ( in.read(compressed.get_base(), x) == 0 || x != in.gcount() )
+      throw(streamException(in.rdstate()));
+
+   compressed.set_content_sz(x);
+
+   in.close();
+
+   return;
+}
+
+void zip::decompress(buffer& compressed, buffer& uncompressed) 
+{
+   fstream out(COMPRESSED, ios::out|ios::trunc);
+
+   if ( !out )
+      throw(streamException(out.rdstate()));
+
+   if ( out.write(compressed.get_base(), compressed.content_sz()) == 0 )
+      throw(streamException(out.rdstate()));
+
+   out.close();
+
+   system(form("gzip -cd %s > %s", COMPRESSED, UNCOMPRESSED));
+
+   fstream in(UNCOMPRESSED, ios::in);
+
+   if ( !in )
+      throw(streamException(in.rdstate()));
+
+   int x = bytes(in);
+
+   uncompressed.expand_chunk(x);
+
+   if ( in.read(uncompressed.get_base(), x) == 0 || x != in.gcount() )
+      throw(streamException(in.rdstate()));
+
+   uncompressed.set_content_sz(x);
+
+   in.close();
+
+   return;
+}
+
+io_status zip::build_dict(lex_func_t, getchar_func_t)
+{
+   return done;
+}
+
+MMDB_BODIES(zip)
+
+int zip::cdr_sizeof()
+{
+   return 0;
+}
+
+io_status zip::cdrOut(buffer&)
+{
+   return done;
+}
+
+io_status zip::cdrIn(buffer&)
+{
+   return done;
+}
+
+