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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commit460c52653ab0dcca6f19a4f492ed2c5e4e963ab0 (patch)
tree67208f7c145782a7e90b123b982ca78d88cc2c87 /indexlib/bitstream.cpp
downloadtdepim-460c52653ab0dcca6f19a4f492ed2c5e4e963ab0.tar.gz
tdepim-460c52653ab0dcca6f19a4f492ed2c5e4e963ab0.zip
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
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diff --git a/indexlib/bitstream.cpp b/indexlib/bitstream.cpp
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+
+/* 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 "bitstream.h"
+#include "logfile.h"
+#include "format.h"
+
+#include <assert.h>
+
+bitstream::bitstream( unsigned char* data, unsigned size )
+ :bytes_( data ),
+ writeable_( true ),
+ size_( size ),
+ cur_( 0 ) { }
+
+bitstream::bitstream( const unsigned char* data, unsigned size )
+ :bytes_( const_cast<unsigned char*>( data ) ),
+ writeable_( false ),
+ size_( size ),
+ cur_( 0 ) { }
+
+bool bit( unsigned v, unsigned idx ) {
+ return ( v >> idx ) & 1;
+}
+
+bitstream& bitstream::operator << ( uint16_t x ) {
+ for ( unsigned i = 0; i != 16; ++i ) putbit( bit( x, i ) );
+ return *this;
+}
+
+bitstream& bitstream::operator << ( uint32_t x ) {
+ for ( unsigned i = 0; i != 32; ++i ) putbit( bit( x, i ) );
+ return *this;
+}
+
+bitstream& bitstream::operator >> ( uint16_t& v ) {
+ v = 0;
+ for ( int i = 0; i != 16; ++i ) {
+ v <<= 1;
+ v |= getbit();
+ }
+ return *this;
+}
+
+bitstream& bitstream::operator >> ( uint32_t& v ) {
+ v = 0;
+ for ( int i = 0; i != 32; ++i ) {
+ v <<= 1;
+ v |= getbit();
+ }
+ return *this;
+}
+
+void bitstream::putback( uint16_t ) {
+ assert( cur_ >= 16 );
+ cur_ -= 16;
+}
+
+void bitstream::putback( uint32_t ) {
+ assert( cur_ >= 32 );
+ cur_ -= 32;
+}
+
+bool bitstream::getbit() {
+ unsigned inbyte = cur_ % 8;
+ unsigned byte = cur_ / 8;
+ ++cur_;
+ return ( bytes_[ byte ] >> inbyte ) & 1;
+}
+
+void bitstream::putbit( bool value ) {
+ unsigned inbyte = cur_ % 8;
+ unsigned byte = cur_ / 8;
+ assert( byte < size_ );
+ if ( value ) bytes_[ byte ] |= ( 1 << inbyte );
+ else bytes_[ byte ] &= ~( 1 << inbyte );
+ ++cur_;
+}
+
+