/sqlite3cc

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  • Committer: edam
  • Date: 2010-01-28 12:21:03 UTC
  • Revision ID: edam@waxworlds.org-20100128122103-v3gs6hro5h7ffnhb
- further initial development
- basic support for: queries, rows (query results)
- filename, comment header and project name consistency

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src/query.cc
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#include <sqlite3cc/query.h>
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#include <sqlite3cc/row.h>
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#include <sqlite3cc/database.h>
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#include <assert.h>
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        database &database,
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        const std::string &sql )
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        :
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        basic_statement( database, sql ),
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        _next_row( 0 )
 
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        basic_statement( database, sql )
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{
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        assert( sqlite3_column_count( _handle ) > 0 );
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}
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sqlite::query::query(
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        database &database )
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        :
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        basic_statement( database ),
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        _next_row( 0 )
 
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        basic_statement( database )
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{
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}
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int sqlite::query::prepare(
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        const std::string &sql )
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{
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        _next_row = 0;
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        int code = basic_statement::prepare( sql );
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        assert( code != SQLITE_OK || sqlite3_column_count( _handle ) > 0 );
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        return code;
 
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        int error_code = basic_statement::prepare( sql );
 
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        assert( error_code != SQLITE_OK || sqlite3_column_count( _handle ) > 0 );
 
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        return error_code;
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}
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sqlite::row sqlite::query::step()
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{
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        database::database_mutex_guard lock( _database );
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        int code = basic_statement::step();
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        if( code == SQLITE_DONE ) return row();
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        if( code == SQLITE_ROW ) return row( _handle, _next_row++ );
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        throw sqlite_error( _database, code );
 
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        int error_code = basic_statement::step();
 
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        if( error_code == SQLITE_ROW )
 
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                return row( *this );
 
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        if( error_code == SQLITE_DONE )
 
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                return row( *this, false );
 
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        throw sqlite_error( error_code );
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}
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{
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        return sqlite3_column_count( _handle );
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}
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const std::string sqlite::query::column_name(
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        unsigned int index )
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{
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        assert( index <
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                static_cast< unsigned int >( sqlite3_column_count( _handle ) ) );
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        return sqlite3_column_name( _handle, index );
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}
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sqlite::query::iterator::iterator(
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        sqlite::query &query,
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        bool valid )
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        :
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        _query( query )
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{
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        if( valid )
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                increment();
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        else
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                _valid = false;
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}
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sqlite::row sqlite::query::iterator::dereference() const
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{
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        return sqlite::row( _query._handle, _query._next_row++ );
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}
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void sqlite::query::iterator::increment()
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{
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        _valid = _query.step();
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}
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bool sqlite::query::iterator::equal(
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        sqlite::query::iterator const &other )
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        const
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{
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        return _valid == other._valid;
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}
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sqlite::query::iterator sqlite::query::begin()
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{
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        return sqlite::query::iterator( *this, true );
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}
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sqlite::query::iterator sqlite::query::end()
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{
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        return sqlite::query::iterator( *this, false );
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}
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