/* This file is part of Mapnik (c++ mapping toolkit) * Copyright (C) 2005 Artem Pavlenko * * Mapnik is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ //$Id: shape_io.cc 26 2005-03-29 19:18:59Z pavlenko $ #include "shape_io.hpp" #include "shape.hpp" const std::string shape_io::SHP = ".shp"; const std::string shape_io::DBF = ".dbf"; shape_io::shape_io(const std::string& shape_name) : type_(shape_null), reclength_(0), id_(0) { bool ok = (shp_.open(shape_name + SHP) && dbf_.open(shape_name + DBF)); if (!ok) { throw datasource_exception("cannot read shape file"); } } shape_io::~shape_io() { shp_.close(); dbf_.close(); } void shape_io::move_to (int pos) { shp_.seek(pos); id_ = shp_.read_xdr_integer(); reclength_ = shp_.read_xdr_integer(); type_ = shp_.read_ndr_integer(); if (type_ != shape_point) { shp_.read_envelope(cur_extent_); } } int shape_io::type() const { return type_; } const Envelope& shape_io::current_extent() const { return cur_extent_; } shape_file& shape_io::shp() { return shp_; } shape_file& shape_io::shx() { return shx_; } dbf_file& shape_io::dbf() { return dbf_; } geometry_ptr shape_io::read_polyline() { shape_record record(reclength_*2-36); shp_.read_record(record); int num_parts=record.read_ndr_integer(); int num_points=record.read_ndr_integer(); geometry_ptr line(new line_string_impl(-1)); line->set_capacity(num_points + num_parts); if (num_parts == 1) { line->set_capacity(num_points + 1); record.skip(4); double x=record.read_double(); double y=record.read_double(); line->move_to(x,y); for (int i=1;iline_to(x,y); } } else { std::vector parts(num_parts); for (int i=0;imove_to(x,y); for (int j=start+1;jline_to(x,y); } } } return line; } geometry_ptr shape_io::read_polylinem() { shape_record record(reclength_*2-36); shp_.read_record(record); int num_parts=record.read_ndr_integer(); int num_points=record.read_ndr_integer(); geometry_ptr line(new line_string_impl(-1)); line->set_capacity(num_points + num_parts); if (num_parts == 1) { record.skip(4); double x=record.read_double(); double y=record.read_double(); line->move_to(x,y); for (int i=1;iline_to(x,y); } } else { std::vector parts(num_parts); for (int i=0;imove_to(x,y); for (int j=start+1;jline_to(x,y); } } } // m-range //double m0=record.read_double(); //double m1=record.read_double(); //for (int i=0;iset_capacity(num_points + num_parts); if (num_parts == 1) { record.skip(4); double x=record.read_double(); double y=record.read_double(); line->move_to(x,y); for (int i=1;iline_to(x,y); } } else { std::vector parts(num_parts); for (int i=0;imove_to(x,y); for (int j=start+1;jline_to(x,y); } } } // z-range //double z0=record.read_double(); //double z1=record.read_double(); //for (int i=0;i parts(num_parts); geometry_ptr poly(new polygon_impl(-1)); poly->set_capacity(num_points + num_parts); for (int i=0;imove_to(x,y); for (int j=start+1;jline_to(x,y); } } return poly; } geometry_ptr shape_io::read_polygonm() { shape_record record(reclength_*2-36); shp_.read_record(record); int num_parts=record.read_ndr_integer(); int num_points=record.read_ndr_integer(); std::vector parts(num_parts); geometry_ptr poly(new polygon_impl(-1)); poly->set_capacity(num_points + num_parts); for (int i=0;imove_to(x,y); for (int j=start+1;jline_to(x,y); } } // m-range //double m0=record.read_double(); //double m1=record.read_double(); //for (int i=0;i parts(num_parts); geometry_ptr poly(new polygon_impl(-1)); poly->set_capacity(num_points + num_parts); for (int i=0;imove_to(x,y); for (int j=start+1;jline_to(x,y); } } // z-range //double z0=record.read_double(); //double z1=record.read_double(); //for (int i=0;i