--- src/zfstream.hpp.orig	2007-12-28 17:04:40.000000000 +0100
+++ src/zfstream.hpp	2007-12-28 17:06:16.000000000 +0100
@@ -45,7 +45,9 @@
                  */
         	GZipCompression = ZLibCompression,
                 /** BZipCompression means to use the zfstream::obzstream class for output streams. */
-	        BZipCompression = 2
+	        BZipCompression = 2,
+                /** ZipCompression means to use the zfstream::ozipstream class for output streams. */
+	        ZipCompression = 3
         };
 
         /**
@@ -81,6 +83,7 @@
            - std::ifstream
            - zfstream::gzstream
            - zfstream::bzstream
+           - zfstream::zipstream
 
            It will return NULL if it cannot open filename, or a
            std::ifstream if it cannot figure out a decompression
@@ -110,6 +113,7 @@
 
            - zfstream::ogzstream
            - zfstream::obzstream
+           - zfstream::ozipstream
            - std::ofstream
 
            Note that this function only uses filename to pass to the
--- src/zfstream.cpp.orig	2007-12-28 17:04:49.000000000 +0100
+++ src/zfstream.cpp	2007-12-28 17:11:39.000000000 +0100
@@ -17,6 +17,7 @@
 
 #if HAVE_ZLIB
 #  include "gzstream.hpp"
+#  include "zipstream.hpp"
 #endif
 #if HAVE_BZLIB
 #  include "bzstream.hpp"
@@ -33,6 +34,7 @@
                   case( NoCompression ): return "NoCompression";  break;
                   case( ZLibCompression ): return "ZLibCompression"; break;
                   case( BZipCompression ): return "BZipCompression"; break;
+                  case( ZipCompression ): return "ZipCompression"; break;
                   default: return ""; break;
                 }
         }
@@ -46,6 +48,7 @@
 #endif                
 #if HAVE_ZLIB
                 if( ZLibCompression == p ) return true;
+                if( ZipCompression == p ) return true;
 #endif            
                 return false;
         }
@@ -107,6 +110,12 @@
                         //COUT << "gzip!"<<std::endl;
                         return new zfstream::igzstream( src.c_str() );
                 }
+                // zip=504b 0304 (dec: 80 75 3 4)  ascii: PK\003\004
+                if( 0x50 == buff[0] && 0x4b == buff[1] )
+                {
+                        //COUT << "zip!"<<std::endl;
+                        return new zfstream::izipstream( src.c_str() );
+                }
 #endif            
                 return new std::ifstream( src.c_str() );
         }
@@ -121,6 +130,7 @@
                   // REMINDER: when/if GZip/ZLib mean different things, this will break!
                   // C++ won't let me put both in here when they have the same value.
                   case ZLibCompression: return new zfstream::ogzstream( fname.c_str() );
+                  case ZipCompression: return new zfstream::ozipstream( fname.c_str() );
 #endif
 #if HAVE_BZLIB
                   case BZipCompression: return new zfstream::obzstream( fname.c_str() );