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115 lines
3.8 KiB
115 lines
3.8 KiB
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/* This file is part of indexlib.
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* Copyright (C) 2005 Luís Pedro Coelho <luis@luispedro.org>
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*
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* Indexlib is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation and available as file
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* GPL_V2 which is distributed along with indexlib.
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*
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* Indexlib is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of this program with any edition of
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* the Qt library by Trolltech AS, Norway (or with modified versions
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* of Qt that use the same license as Qt), and distribute linked
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* combinations including the two. You must obey the GNU General
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* Public License in all respects for all of the code used other than
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* Qt. If you modify this file, you may extend this exception to
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* your version of the file, but you are not obligated to do so. If
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* you do not wish to do so, delete this exception statement from
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* your version.
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*/
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#include "stringarray.h"
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#include "mmap_manager.h"
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#include "bitio.h"
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#include "logfile.h"
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#include "path.h"
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#include "format.h"
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stringarray::stringarray( std::string filebase ):
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data_( new mmap_manager( path_concat( filebase, "string-data" ) ) ),
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indeces_( path_concat( filebase, "string-indeces" ) )
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{
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if ( !data_->size() ) init_structure();
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}
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void stringarray::remove( std::string filebase ) {
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unlink( path_concat( filebase, "string-data" ).c_str() );
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unlink( path_concat( filebase, "string-indeces" ).c_str() );
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}
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stringarray::~stringarray() {
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}
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stringarray::index_type stringarray::add( std::string str ) {
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const unsigned count = indeces_.size();
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const index_type res = count;
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const index_type previous = count ? indeces_[ count - 1 ] : 0;
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const unsigned starti = count ? ( previous + get( count - 1 ).size() + 1 ) : 0;
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logfile() << format( "add( %s ) at starti = %d, with count = %d\n" ) % str % starti % count;
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if ( ( starti + str.size() + 1 ) > data_->size() ) {
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data_->resize( data_->size() + str.size() + 1 );
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}
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strcpy( reinterpret_cast<char*>( data_->rw_base( starti ) ), str.c_str() );
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indeces_.push_back( starti );
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return res;
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}
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void stringarray::erase( index_type idx ) {
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assert( idx < size() );
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char* target = const_cast<char*>( get_cstr( idx ) );
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if ( idx != size() - 1 ) {
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const char* next = get_cstr( idx + 1 );
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unsigned delta = strlen( target ) + 1;
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std::memmove( target, next, data_->size() - indeces_[ idx + 1 ] );
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// Hack: Don't compare the iterators directly, it ices gcc-2.95
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for ( memvector<uint32_t>::iterator first = indeces_.begin() + idx, past = indeces_.end(); first.raw() != past.raw(); ++first ) {
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*first -= delta;
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}
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}
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indeces_.erase( indeces_.begin() + idx );
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}
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void stringarray::clear() {
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data_->resize( 0 );
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indeces_.clear();
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}
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const char* stringarray::get_cstr( index_type idx ) const {
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uint32_t didx = indeces_[ idx ];
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//logfile() << format( "stringarray::get( %s ): %s\n" ) % idx
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// % std::string( reinterpret_cast<char*>( data_->base() ) + didx );
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return reinterpret_cast<const char*>( data_->ronly_base( didx ) );
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}
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void stringarray::init_structure() {
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}
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void stringarray::print( std::ostream& out ) const {
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for ( unsigned i = 0; i != indeces_.size(); ++i ) {
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out << format( "string[ %s ] = %s\n" ) % i % get_cstr( i );
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}
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}
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void stringarray::verify() const {
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for ( unsigned i = 1; i < indeces_.size(); ++i ) {
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assert( !*( data_->ronly_base( indeces_[ i ] - 1 ) ) );
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}
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}
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