1 files changed, 79 insertions, 0 deletions
diff --git a/indexlib/match.cpp b/indexlib/match.cpp
new file mode 100644
index 000000000..a73dc5f5a
--- /dev/null
+++ b/indexlib/match.cpp
@@ -0,0 +1,79 @@
+
+/* This file is part of indexlib.
+ * Copyright (C) 2005 Luís Pedro Coelho <luis@luispedro.org>
+ *
+ * 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 "match.h"
+#include "format.h"
+#include "compat.h"
+#include <iostream>
+#include <assert.h>
+
+namespace {
+	inline
+	void setbit( unsigned& u, unsigned idx ) {
+		u |= ( 1 << idx );
+	}
+	inline
+	bool getbit( unsigned u, unsigned idx ) {
+		return u & ( 1 << idx );
+	}
+}
+
+indexlib::Match::Match( std::string str, unsigned flags ):
+	masks_( 256 ),
+	caseinsensitive_( flags & caseinsensitive ),
+	pattern_rest_( str, kMin( str.size(), sizeof( unsigned ) * 8 - 1 ) )
+{
+	hot_bit_ = kMin( str.size(), sizeof( unsigned ) * 8 - 1 );
+	for ( unsigned i = 0; i != hot_bit_; ++i ) {
+		if ( caseinsensitive_ ) {
+			setbit( masks_[ ( unsigned char )std::toupper( str[ i ] ) ], i );
+			setbit( masks_[ ( unsigned char )std::tolower( str[ i ] ) ], i );
+		} else {
+			setbit( masks_[ ( unsigned char )str[ i ] ], i );
+		}
+	}
+}
+
+indexlib::Match::~Match() {
+}
+
+bool indexlib::Match::process( const char* string ) const {
+	unsigned state = 0;
+	while ( *string ) {
+		state |= 1;
+		state &= masks_[ ( unsigned char )*string ];
+		state <<= 1;
+		++string;
+		if ( getbit( state, hot_bit_ ) && ( pattern_rest_ == std::string( string, pattern_rest_.size() ) ) ) return true;
+	}
+	return !hot_bit_;
+}
+