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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2011 Artem Pavlenko
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
#ifndef MAPNIK_SQLITE_RESULTSET_HPP
#define MAPNIK_SQLITE_RESULTSET_HPP
// mapnik
#include <mapnik/debug.hpp>
#include <mapnik/datasource.hpp>
#include <mapnik/params.hpp>
// stl
#include <string.h>
// sqlite
extern "C" {
#include <sqlite3.h>
}
//==============================================================================
class sqlite_resultset
{
public:
sqlite_resultset (sqlite3_stmt* stmt)
: stmt_(stmt)
{
}
~sqlite_resultset ()
{
if (stmt_)
{
sqlite3_finalize (stmt_);
}
}
bool is_valid ()
{
return stmt_ != 0;
}
bool step_next ()
{
const int status = sqlite3_step (stmt_);
if (status != SQLITE_ROW && status != SQLITE_DONE)
{
std::ostringstream s;
s << "SQLite Plugin: retrieving next row failed";
std::string msg(sqlite3_errmsg(sqlite3_db_handle(stmt_)));
if (msg != "unknown error")
{
s << ": " << msg;
}
throw mapnik::datasource_exception(s.str());
}
return status == SQLITE_ROW;
}
int column_count ()
{
return sqlite3_column_count (stmt_);
}
int column_type (int col)
{
return sqlite3_column_type (stmt_, col);
}
const char* column_name (int col)
{
return sqlite3_column_name (stmt_, col);
}
bool column_isnull (int col)
{
return sqlite3_column_type (stmt_, col) == SQLITE_NULL;
}
int column_integer (int col)
{
return sqlite3_column_int (stmt_, col);
}
sqlite_int64 column_integer64 (int col)
{
return sqlite3_column_int64 (stmt_, col);
}
double column_double (int col)
{
return sqlite3_column_double (stmt_, col);
}
const char* column_text (int col, int& len)
{
len = sqlite3_column_bytes (stmt_, col);
return (const char*) sqlite3_column_text (stmt_, col);
}
const char* column_text (int col)
{
return (const char*) sqlite3_column_text (stmt_, col);
}
const void* column_blob (int col, int& bytes)
{
bytes = sqlite3_column_bytes (stmt_, col);
return (const char*) sqlite3_column_blob (stmt_, col);
}
sqlite3_stmt* get_statement()
{
return stmt_;
}
private:
sqlite3_stmt* stmt_;
};
#endif // MAPNIK_SQLITE_RESULTSET_HPP
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