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/*
* query.cc
*
* Copyright (C) 2009 Tim Marston <edam@waxworlds.org>
*
* This file is part of sqlite3cc (hereafter referred to as "this program").
* See http://www.waxworlds.org/edam/software/sqlite3cc for more information.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sqlite3cc/query.h>
#include <sqlite3cc/row.h>
#include <assert.h>
sqlite::query::query(
database &database,
const std::string &sql )
:
basic_statement( database, sql ),
_next_row( 0 )
{
assert( sqlite3_column_count( _handle ) > 0 );
}
sqlite::query::query(
database &database )
:
basic_statement( database ),
_next_row( 0 )
{
}
int sqlite::query::prepare(
const std::string &sql )
{
_next_row = 0;
int error_code = basic_statement::prepare( sql );
assert( error_code != SQLITE_OK || sqlite3_column_count( _handle ) > 0 );
return error_code;
}
sqlite::row sqlite::query::step()
{
// sqlite3_mutex_enter( sqlite3_db_mutex( _database ) );
// try {
int error_code = basic_statement::step();
if( error_code == SQLITE_ROW ) {
// sqlite3_mutex_leave( sqlite3_db_mutex( _database ) );
return row( _handle, _next_row++ );
}
if( error_code == SQLITE_DONE ) {
// sqlite3_mutex_leave( sqlite3_db_mutex( _database ) );
return row();
}
throw sqlite_error( error_code );
// }
// catch( ... ) {
// sqlite3_mutex_leave( sqlite3_db_mutex( _database ) );
// throw;
// }
}
unsigned int sqlite::query::column_count()
{
return sqlite3_column_count( _handle );
}
const std::string sqlite::query::column_name(
unsigned int index )
{
assert( index <
static_cast< unsigned int >( sqlite3_column_count( _handle ) ) );
return sqlite3_column_name( _handle, index );
}
sqlite::query::iterator::iterator(
sqlite::query &query,
bool valid )
:
_query( query )
{
if( valid )
increment();
else
_valid = false;
}
sqlite::row sqlite::query::iterator::dereference() const
{
return sqlite::row( _query._handle, _query._next_row++ );
}
void sqlite::query::iterator::increment()
{
_valid = _query.step();
}
bool sqlite::query::iterator::equal(
sqlite::query::iterator const &other )
const
{
return _valid == other._valid;
}
sqlite::query::iterator sqlite::query::begin()
{
return sqlite::query::iterator( *this, true );
}
sqlite::query::iterator sqlite::query::end()
{
return sqlite::query::iterator( *this, false );
}
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