/***************************************************************************** * * 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/datasource.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); } int 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