sqlite2xx.cpp

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/*
_______________________________________________________________________________

                                 SqlWrapperXX

-------------------------------------------------------------------------------
Copyright (c) 2007 Kai Braaten

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
-------------------------------------------------------------------------------
*/

#include "sqlite2xx.hpp"

// Public member functions

Sqlite2Context::Sqlite2Context( const string &dbName )
  : handle( 0 ),
    _dbName( dbName )
{
  if( !_dbName.empty() )
    {
      try
        {
          open();
        }
      catch( SqlDatabaseOpenException &e )
        {
          throw e;
        }
    }
}

Sqlite2Context::~Sqlite2Context()
{
  close();
}

void Sqlite2Context::close()
{
  if( handle )
    {
      sqlite_close( handle );
      handle = 0;
    }
}

string Sqlite2Context::escapeString( const string &param ) const
{
  string output = param;
  string::size_type pos = 0;

  while( ( pos = output.find( "'", pos ) ) != string::npos )
    {
      output.replace( pos, 1, "''" );
      pos += 2;
    }

  return output;
}

string Sqlite2Context::version() const
{
  string v = "SQLite ";
  v += sqlite_version;
  return v;
}

// Private member functions

void Sqlite2Context::open()
{
  if( handle == 0 )
    {
      char *errmsg = 0;

      if( !( handle = sqlite_open( _dbName.c_str(), 0, &errmsg ) ) )
        {
          string ex = "Failed to open database: ";
          ex += errmsg;
          close();
          throw SqlDatabaseOpenException( ex );
        }
    }
}

SqlResult Sqlite2Context::query( const string &sql ) const
{
  sqlite_vm *vm = 0;
  const char *tail = 0;
  string original = sql;
  SqlResult result;

  do
    {
      char *errMsg = 0;

      if( sqlite_compile( handle, original.c_str(), &tail, &vm, &errMsg ) != SQLITE_OK )
        {
          string ex = "Bad SQL statement: ";
          ex += original;
          ex += "\nSqlite2 message: ";
          ex += errMsg;
          sqlite_freemem( errMsg );
          throw SqlDatabaseBadStatementException( ex );
        }

      int numCols = 0;
      const char **rawResult;

      while( sqlite_step( vm, &numCols, &rawResult, 0 ) == SQLITE_ROW )
        {
          SqlRow *row = new SqlRow( numCols );
          result.add( row );

          for( int col = 0; col < row->columns(); ++col )
            {
              row->add( rawResult[ col ] );
            }
        }

      original = tail;
    }
  while( *tail != '\0' );

  sqlite_finalize( vm, 0 );
  return result;
}

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