/sqlite3cc

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  • Committer: edam
  • Date: 2010-07-23 09:17:03 UTC
  • Revision ID: edam@waxworlds.org-20100723091703-3siqjj6eeux9hupz
- added NEWS
- added library checks to configure.ac
- added query::iterators
- remove dependency that rows have on querys (since querys have to be dependent on rows for boost::iterator_facade to work)
- rows now have the handle to the sqlite3 statement and know a count of their row number
- added convenience function tht can be used to detect presence of sqlite3cc in other packages
- updated test-main
- renamed all subdir.mk files to emake.mk

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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/connection.h>
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#include <assert.h>
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sqlite::query::query(
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        connection &connection,
 
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        database &database,
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        const std::string &sql )
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        :
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        basic_statement( connection, sql ),
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        _next_row_number( 0 )
 
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        basic_statement( database, sql ),
 
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        _next_row( 0 )
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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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        connection &connection )
 
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        database &database )
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        :
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        basic_statement( connection ),
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        _next_row_number( 0 )
 
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        basic_statement( database ),
 
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        _next_row( 0 )
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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_number = 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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}
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int sqlite::query::reset()
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{
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        _next_row_number = 0;
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        return basic_statement::reset();
 
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        _next_row = 0;
 
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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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        connection::mutex_guard lock( _connection );
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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_number++ );
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        throw sqlite_error( _connection, code );
 
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//      sqlite3_mutex_enter( sqlite3_db_mutex( _database ) );
 
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//      try {
 
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                int error_code = basic_statement::step();
 
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                if( error_code == SQLITE_ROW ) {
 
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//                      sqlite3_mutex_leave( sqlite3_db_mutex( _database ) );
 
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                        return row( _handle, _next_row++ );
 
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                }
 
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                if( error_code == SQLITE_DONE ) {
 
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//                      sqlite3_mutex_leave( sqlite3_db_mutex( _database ) );
 
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                        return row();
 
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                }
 
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                throw sqlite_error( error_code );
 
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//      }
 
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//      catch( ... ) {
 
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//              sqlite3_mutex_leave( sqlite3_db_mutex( _database ) );
 
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//              throw;
 
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//      }
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}
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}
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unsigned long long sqlite::query::num_results()
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{
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        reset();
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        unsigned long long count = 0;
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        while( step() ) count++;
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        reset();
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        return count;
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}
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sqlite::query::iterator::iterator(
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        sqlite::query &query,
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        bool step )
 
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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( step ) increment();
 
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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 _row;
 
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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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        _row = _query.step();
 
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        _valid = _query.step();
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}
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        sqlite::query::iterator const &other )
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        const
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{
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        return _row == other._row;
 
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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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        reset();
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        return sqlite::query::iterator( *this, true );
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}
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{
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        return sqlite::query::iterator( *this, false );
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}
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