1 files changed, 136 insertions, 0 deletions
diff --git a/debian/htdig/htdig-3.2.0b6/htcommon/HtZlibCodec.cc b/debian/htdig/htdig-3.2.0b6/htcommon/HtZlibCodec.cc
new file mode 100644
index 00000000..ac48877f
--- /dev/null
+++ b/debian/htdig/htdig-3.2.0b6/htcommon/HtZlibCodec.cc
@@ -0,0 +1,136 @@
+//
+// HtZlibCodec.cc
+//
+// HtZlibCodec: Provide a generic access to the zlib compression routines.
+//              If zlib is not present, encode and decode are simply 
+//              assignment functions.
+//
+// Part of the ht://Dig package   <http://www.htdig.org/>
+// Copyright (c) 1995-2004 The ht://Dig Group
+// For copyright details, see the file COPYING in your distribution
+// or the GNU Library General Public License (LGPL) version 2 or later
+// <http://www.gnu.org/copyleft/lgpl.html>
+//
+// $Id: HtZlibCodec.cc,v 1.4 2004/05/28 13:15:12 lha Exp $
+//
+
+#ifdef HAVE_CONFIG_H
+#include "htconfig.h"
+#endif /* HAVE_CONFIG_H */
+
+#include "HtZlibCodec.h"
+#include "defaults.h" // For "config"
+
+#if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H)
+#include <zlib.h>
+#endif
+
+
+HtZlibCodec::HtZlibCodec()
+{
+}
+
+HtZlibCodec::~HtZlibCodec()
+{
+}
+
+String HtZlibCodec::encode(const String &str) const
+{
+  String s = str;
+#if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H)
+  HtConfiguration* config= HtConfiguration::config();
+  static int cf=config->Value("compression_level",0);    
+  if (cf) {
+    //
+    // Now compress s into c_s
+    //
+    unsigned char c_buffer[16384];
+    String c_s;
+    z_stream c_stream; /* compression stream */
+    c_stream.zalloc=(alloc_func)0;
+    c_stream.zfree=(free_func)0;
+    c_stream.opaque=(voidpf)0;
+    // Get compression factor, default to best
+    if (cf<-1) cf=-1; else if (cf>9) cf=9;
+    int err=deflateInit(&c_stream,cf);
+    if (err!=Z_OK) return 0;
+    int len=s.length();
+    c_stream.next_in=(Bytef*)(char *)s;
+    c_stream.avail_in=len;
+    while (err==Z_OK && c_stream.total_in!=(uLong)len) {
+      c_stream.next_out=c_buffer;
+      c_stream.avail_out=sizeof(c_buffer);
+      err=deflate(&c_stream,Z_NO_FLUSH);
+      c_s.append((char *)c_buffer,c_stream.next_out-c_buffer);
+    }
+    // Finish the stream
+    for (;;) {
+      c_stream.next_out=c_buffer;
+      c_stream.avail_out=sizeof(c_buffer);
+      err=deflate(&c_stream,Z_FINISH);
+      c_s.append((char *)c_buffer,c_stream.next_out-c_buffer);
+      if (err==Z_STREAM_END) break;
+      //CHECK_ERR(err, "deflate");
+    }
+    err=deflateEnd(&c_stream); 
+    s=c_s;
+  }
+#endif // HAVE_LIBZ && HAVE_ZLIB_H
+  return s;
+}
+
+
+String HtZlibCodec::decode(const String &str) const
+{
+  String s = str;
+#if defined(HAVE_LIBZ) && defined(HAVE_ZLIB_H)
+  HtConfiguration* config= HtConfiguration::config();
+  static int cf=config->Value("compression_level",0);    
+  if (cf) {
+    String c_s;
+    // Decompress stream
+    unsigned char c_buffer[16384];
+    z_stream d_stream;
+    d_stream.zalloc=(alloc_func)0;
+    d_stream.zfree=(free_func)0;
+    d_stream.opaque=(voidpf)0;
+    
+    unsigned int len=s.length();
+    d_stream.next_in=(Bytef*)(char *)s;
+    d_stream.avail_in=len;
+    
+    int err=inflateInit(&d_stream);
+    if (err!=Z_OK) return 1;
+    
+    while (err==Z_OK && d_stream.total_in<len) {
+      d_stream.next_out=c_buffer;
+      d_stream.avail_out=sizeof(c_buffer);
+      err=inflate(&d_stream,Z_NO_FLUSH);
+      c_s.append((char *)c_buffer,d_stream.next_out-c_buffer);
+      if (err==Z_STREAM_END) break;
+    }
+    
+    err=inflateEnd(&d_stream);
+    s=c_s;
+  }
+#endif // HAVE_LIBZ && HAVE_ZLIB_H
+  return s;
+}
+
+
+// Canonical singleton interface.
+HtZlibCodec *
+HtZlibCodec::instance()
+{
+  static HtZlibCodec *_instance = 0;
+
+  if (_instance == 0)
+  {
+    _instance = new HtZlibCodec();
+  }
+
+  return _instance;
+}
+
+
+// End of HtZlibCodec.cc