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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 "stringarray.h"
#include "mmap_manager.h"
#include "bitio.h"
#include "logfile.h"
#include "path.h"
#include "format.h"
stringarray::stringarray( std::string filebase ):
data_( new mmap_manager( path_concat( filebase, "string-data" ) ) ),
indeces_( path_concat( filebase, "string-indeces" ) )
{
if ( !data_->size() ) init_structure();
}
void stringarray::remove( std::string filebase ) {
unlink( path_concat( filebase, "string-data" ).c_str() );
unlink( path_concat( filebase, "string-indeces" ).c_str() );
}
stringarray::~stringarray() {
}
stringarray::index_type stringarray::add( std::string str ) {
const unsigned count = indeces_.size();
const index_type res = count;
const index_type previous = count ? indeces_[ count - 1 ] : 0;
const unsigned starti = count ? ( previous + get( count - 1 ).size() + 1 ) : 0;
logfile() << format( "add( %s ) at starti = %d, with count = %d\n" ) % str % starti % count;
if ( ( starti + str.size() + 1 ) > data_->size() ) {
data_->resize( data_->size() + str.size() + 1 );
}
strcpy( reinterpret_cast<char*>( data_->rw_base( starti ) ), str.c_str() );
indeces_.push_back( starti );
return res;
}
void stringarray::erase( index_type idx ) {
assert( idx < size() );
char* target = const_cast<char*>( get_cstr( idx ) );
if ( idx != size() - 1 ) {
const char* next = get_cstr( idx + 1 );
unsigned delta = strlen( target ) + 1;
std::memmove( target, next, data_->size() - indeces_[ idx + 1 ] );
// Hack: Don't compare the iterators directly, it ices gcc-2.95
for ( memvector<uint32_t>::iterator first = indeces_.begin() + idx, past = indeces_.end(); first.raw() != past.raw(); ++first ) {
*first -= delta;
}
}
indeces_.erase( indeces_.begin() + idx );
}
void stringarray::clear() {
data_->resize( 0 );
indeces_.clear();
}
const char* stringarray::get_cstr( index_type idx ) const {
uint32_t didx = indeces_[ idx ];
//logfile() << format( "stringarray::get( %s ): %s\n" ) % idx
// % std::string( reinterpret_cast<char*>( data_->base() ) + didx );
return reinterpret_cast<const char*>( data_->ronly_base( didx ) );
}
void stringarray::init_structure() {
}
void stringarray::print( std::ostream& out ) const {
for ( unsigned i = 0; i != indeces_.size(); ++i ) {
out << format( "string[ %s ] = %s\n" ) % i % get_cstr( i );
}
}
void stringarray::verify() const {
for ( unsigned i = 1; i < indeces_.size(); ++i ) {
assert( !*( data_->ronly_base( indeces_[ i ] - 1 ) ) );
}
}
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