Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdepim@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 127 insertions, 0 deletions

diff --git a/indexlib/compressed.h b/indexlib/compressed.h
new file mode 100644
index 000000000..7397c8215
--- /dev/null
+++ b/indexlib/compressed.h
@@ -0,0 +1,127 @@
+#ifndef LPC_COMPRESSED_H1108569807_INCLUDE_GUARD_
+#define LPC_COMPRESSED_H1108569807_INCLUDE_GUARD_
+
+/* This file is part of indexlib.
+ * Copyright (C) 2005 Luís Pedro Coelho <[email protected]>
+ *
+ * Indexlib is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation and available as file
+ * GPL_V2 which is distributed along with indexlib.
+ * 
+ * Indexlib 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
+ * 
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of this program with any edition of
+ * the Qt library by Trolltech AS, Norway (or with modified versions
+ * of Qt that use the same license as Qt), and distribute linked
+ * combinations including the two.  You must obey the GNU General
+ * Public License in all respects for all of the code used other than
+ * Qt.  If you modify this file, you may extend this exception to
+ * your version of the file, but you are not obligated to do so.  If
+ * you do not wish to do so, delete this exception statement from
+ * your version.
+ */
+
+#include <string>
+#include <vector>
+#include <memory>
+#include <iostream>
+#include "memvector.h"
+#include "manager.h"
+#include "mempool.h"
+#include "thing.h"
+#include "pointer.h"
+#include "format.h"
+
+void set_compression_manager( memory_manager* );
+memory_manager* get_comp_p();
+
+START_THING( compressed_page, thing<thing_manager<get_comp_p> > ) 
+	public: // private:
+		MEMBER( uint8_t, capacity, 0 )
+		enum { header_size = 1 };
+		MY_BASE( header_size )
+	public:
+		static void init( pointer<compressed_page> p ) {
+			p->set_capacity( 4 );
+		}
+		void * data() { return my_base(); }
+		const void * data() const { return my_base(); }
+		void grow_to_size( const unsigned size ) {
+			unsigned cur = ( 1 << capacity() ) - header_size;
+			if ( size <= cur ) return;
+			set_capacity( capacity() + 1 );
+			grow_to_size( size );
+		}
+		void print( std::ostream& out ) {
+			out << format( "\tsized %s\n" ) % ( 1 << capacity() );
+		}
+END_THING( compressed_page )
+DO_POINTER_SPECS( compressed_page )
+
+struct compressed_page_traits {
+	typedef compressed_page value_type;
+	typedef compressed_pageptr pointer;
+
+	static bool is_free( pointer p ) { return p->capacity() == 0; }
+	static void mark_free( pointer p ) { p->set_capacity( 0 ); }
+	static unsigned size_of( pointer p ) { return 1 << p->capacity(); }
+
+	static unsigned type_offset() { return compressed_page::header_size; }
+
+	static unsigned min_size() { return 16; } // zlib needs minimum 12 bytes
+	static unsigned max_size() { return 1024 * 4; }
+	
+	static void set_manager( memory_manager* m ) { set_compression_manager( m ); }
+	static void print( std::ostream& out, pointer p ) { out << '[' << p << "] compressed_page:\n"; p->print( out ); }
+};
+
+class compressed_file : public memory_manager {
+		struct page;
+		friend struct page;
+	public:
+		compressed_file( std::string );
+		~compressed_file();
+		const unsigned char* ronly_base( unsigned idx ) const;
+		unsigned char* rw_base( unsigned idx ) const;
+		unsigned size() const;
+		void resize( unsigned );
+		void print( std::ostream& ) const;
+		static void remove( std::string base );
+	private:
+
+		void write_back();
+		void zlibchecktrue( bool ) const;
+		void zlibcheck( int err, int expected = 0 ) const;
+
+		enum { page_bits = 12, page_bytes = 1 << page_bits, compress_buffer_size = page_bytes + 12 + page_bytes/50 };
+		static unsigned pageidx( unsigned idx ) { return idx >> page_bits; }
+		static unsigned inpageidx( unsigned idx ) { return idx & ( ( 1 << page_bits ) - 1 ); }
+		struct page {
+			explicit page( bool d = false ):
+				dirty_( d ) {
+				}
+			compressed_pageptr origin_;
+			bool dirty_;
+			unsigned char data_[ compressed_file::page_bytes ];
+		};
+		mutable std::vector<page*> pages_;
+		mutable memvector<uint32_t> auxdata_;
+		memory_reference<uint32_t> compressed_data_for( unsigned idx ) const {
+			return auxdata_[ idx + 1 ];
+		}
+		mempool<compressed_page_traits> data_;
+};
+
+
+
+#endif /* LPC_COMPRESSED_H1108569807_INCLUDE_GUARD_ */