419 lines
9.1 KiB
C++
419 lines
9.1 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2006 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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//$Id: shape_io.cc 26 2005-03-29 19:18:59Z pavlenko $
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#include "shape_io.hpp"
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#include "shape.hpp"
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const std::string shape_io::SHP = ".shp";
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const std::string shape_io::DBF = ".dbf";
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shape_io::shape_io(const std::string& shape_name)
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: type_(shape_null),
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reclength_(0),
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id_(0)
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{
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bool ok = (shp_.open(shape_name + SHP) &&
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dbf_.open(shape_name + DBF));
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if (!ok)
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{
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throw datasource_exception("cannot read shape file");
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}
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}
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shape_io::~shape_io()
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{
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shp_.close();
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dbf_.close();
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}
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void shape_io::move_to (int pos)
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{
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shp_.seek(pos);
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id_ = shp_.read_xdr_integer();
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reclength_ = shp_.read_xdr_integer();
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type_ = shp_.read_ndr_integer();
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if (type_ != shape_point && type_ != shape_pointm && type_ != shape_pointz)
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{
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shp_.read_envelope(cur_extent_);
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}
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}
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int shape_io::type() const
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{
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return type_;
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}
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const Envelope<double>& shape_io::current_extent() const
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{
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return cur_extent_;
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}
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shape_file& shape_io::shp()
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{
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return shp_;
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}
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shape_file& shape_io::shx()
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{
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return shx_;
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}
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dbf_file& shape_io::dbf()
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{
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return dbf_;
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}
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geometry_ptr shape_io::read_polyline()
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{
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shape_record record(reclength_*2-36);
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shp_.read_record(record);
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int num_parts=record.read_ndr_integer();
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int num_points=record.read_ndr_integer();
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geometry_ptr line(new line_string_impl(-1));
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line->set_capacity(num_points + num_parts);
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if (num_parts == 1)
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{
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line->set_capacity(num_points + 1);
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record.skip(4);
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double x=record.read_double();
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double y=record.read_double();
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line->move_to(x,y);
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for (int i=1;i<num_points;++i)
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{
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x=record.read_double();
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y=record.read_double();
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line->line_to(x,y);
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}
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}
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else
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{
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std::vector<int> parts(num_parts);
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for (int i=0;i<num_parts;++i)
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{
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parts[i]=record.read_ndr_integer();
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}
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int start,end;
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for (int k=0;k<num_parts;++k)
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{
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start=parts[k];
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if (k==num_parts-1)
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end=num_points;
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else
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end=parts[k+1];
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double x=record.read_double();
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double y=record.read_double();
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line->move_to(x,y);
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for (int j=start+1;j<end;++j)
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{
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x=record.read_double();
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y=record.read_double();
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line->line_to(x,y);
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}
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}
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}
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return line;
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}
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geometry_ptr shape_io::read_polylinem()
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{
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shape_record record(reclength_*2-36);
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shp_.read_record(record);
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int num_parts=record.read_ndr_integer();
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int num_points=record.read_ndr_integer();
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geometry_ptr line(new line_string_impl(-1));
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line->set_capacity(num_points + num_parts);
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if (num_parts == 1)
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{
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record.skip(4);
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double x=record.read_double();
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double y=record.read_double();
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line->move_to(x,y);
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for (int i=1;i<num_points;++i)
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{
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x=record.read_double();
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y=record.read_double();
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line->line_to(x,y);
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}
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}
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else
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{
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std::vector<int> parts(num_parts);
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for (int i=0;i<num_parts;++i)
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{
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parts[i]=record.read_ndr_integer();
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}
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int start,end;
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for (int k=0;k<num_parts;++k)
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{
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start=parts[k];
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if (k==num_parts-1)
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end=num_points;
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else
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end=parts[k+1];
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double x=record.read_double();
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double y=record.read_double();
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line->move_to(x,y);
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for (int j=start+1;j<end;++j)
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{
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x=record.read_double();
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y=record.read_double();
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line->line_to(x,y);
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}
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}
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}
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// m-range
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//double m0=record.read_double();
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//double m1=record.read_double();
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//for (int i=0;i<num_points;++i)
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//{
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// double m=record.read_double();
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//}
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return line;
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}
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geometry_ptr shape_io::read_polylinez()
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{
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shape_record record(reclength_*2-36);
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shp_.read_record(record);
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int num_parts=record.read_ndr_integer();
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int num_points=record.read_ndr_integer();
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geometry_ptr line(new line_string_impl(-1));
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line->set_capacity(num_points + num_parts);
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if (num_parts == 1)
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{
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record.skip(4);
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double x=record.read_double();
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double y=record.read_double();
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line->move_to(x,y);
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for (int i=1;i<num_points;++i)
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{
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x=record.read_double();
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y=record.read_double();
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line->line_to(x,y);
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}
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}
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else
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{
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std::vector<int> parts(num_parts);
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for (int i=0;i<num_parts;++i)
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{
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parts[i]=record.read_ndr_integer();
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}
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int start,end;
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for (int k=0;k<num_parts;++k)
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{
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start=parts[k];
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if (k==num_parts-1)
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end=num_points;
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else
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end=parts[k+1];
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double x=record.read_double();
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double y=record.read_double();
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line->move_to(x,y);
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for (int j=start+1;j<end;++j)
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{
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x=record.read_double();
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y=record.read_double();
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line->line_to(x,y);
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}
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}
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}
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// z-range
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//double z0=record.read_double();
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//double z1=record.read_double();
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//for (int i=0;i<num_points;++i)
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// {
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// double z=record.read_double();
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// }
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// m-range
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//double m0=record.read_double();
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//double m1=record.read_double();
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//for (int i=0;i<num_points;++i)
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//{
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// double m=record.read_double();
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//}
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return line;
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}
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geometry_ptr shape_io::read_polygon()
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{
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shape_record record(reclength_*2-36);
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shp_.read_record(record);
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int num_parts=record.read_ndr_integer();
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int num_points=record.read_ndr_integer();
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std::vector<int> parts(num_parts);
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geometry_ptr poly(new polygon_impl(-1));
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poly->set_capacity(num_points + num_parts);
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for (int i=0;i<num_parts;++i)
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{
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parts[i]=record.read_ndr_integer();
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}
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for (int k=0;k<num_parts;k++)
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{
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int start=parts[k];
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int end;
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if (k==num_parts-1)
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{
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end=num_points;
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}
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else
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{
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end=parts[k+1];
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}
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double x=record.read_double();
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double y=record.read_double();
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poly->move_to(x,y);
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for (int j=start+1;j<end;j++)
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{
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x=record.read_double();
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y=record.read_double();
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poly->line_to(x,y);
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}
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}
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return poly;
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}
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geometry_ptr shape_io::read_polygonm()
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{
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shape_record record(reclength_*2-36);
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shp_.read_record(record);
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int num_parts=record.read_ndr_integer();
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int num_points=record.read_ndr_integer();
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std::vector<int> parts(num_parts);
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geometry_ptr poly(new polygon_impl(-1));
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poly->set_capacity(num_points + num_parts);
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for (int i=0;i<num_parts;++i)
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{
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parts[i]=record.read_ndr_integer();
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}
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for (int k=0;k<num_parts;k++)
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{
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int start=parts[k];
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int end;
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if (k==num_parts-1)
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{
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end=num_points;
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}
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else
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{
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end=parts[k+1];
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}
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double x=record.read_double();
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double y=record.read_double();
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poly->move_to(x,y);
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for (int j=start+1;j<end;j++)
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{
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x=record.read_double();
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y=record.read_double();
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poly->line_to(x,y);
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}
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}
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// m-range
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//double m0=record.read_double();
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//double m1=record.read_double();
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//for (int i=0;i<num_points;++i)
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//{
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// double m=record.read_double();
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//}
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return poly;
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}
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geometry_ptr shape_io::read_polygonz()
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{
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shape_record record(reclength_*2-36);
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shp_.read_record(record);
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int num_parts=record.read_ndr_integer();
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int num_points=record.read_ndr_integer();
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std::vector<int> parts(num_parts);
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geometry_ptr poly(new polygon_impl(-1));
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poly->set_capacity(num_points + num_parts);
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for (int i=0;i<num_parts;++i)
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{
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parts[i]=record.read_ndr_integer();
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}
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for (int k=0;k<num_parts;k++)
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{
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int start=parts[k];
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int end;
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if (k==num_parts-1)
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{
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end=num_points;
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}
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else
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{
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end=parts[k+1];
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}
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double x=record.read_double();
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double y=record.read_double();
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poly->move_to(x,y);
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for (int j=start+1;j<end;j++)
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{
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x=record.read_double();
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y=record.read_double();
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poly->line_to(x,y);
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}
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}
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// z-range
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//double z0=record.read_double();
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//double z1=record.read_double();
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//for (int i=0;i<num_points;++i)
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//{
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// double z=record.read_double();
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//}
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// m-range
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//double m0=record.read_double();
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//double m1=record.read_double();
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//for (int i=0;i<num_points;++i)
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//{
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// double m=record.read_double();
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//}
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return poly;
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}
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