743 lines
20 KiB
C++
743 lines
20 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2004, University in Hagen, Department of Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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//paragraph [1] Title: [{\Large \bf \begin {center}] [\end {center}}]
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//[TOC] [\tableofcontents]
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//[_] [\_]
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[1] Implementation of the OSM Algebra
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June-November, 2011. Thomas Uchdorf
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[TOC]
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1 Overview
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This implementation file contains the implementation of the class ~ShpFileReader~.
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For more detailed information see ShpFileReader.h.
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2 Defines and Includes
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*/
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// [...]
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#undef __TRACE__
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//#define __TRACE__ cout << __FILE__ << "::" << __LINE__;
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#define __TRACE__
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// --- Including header-files
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#include "Algebras/Spatial/SpatialAlgebra.h"
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#include "ShpFileReader.h"
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#include "Algebras/Spatial/RegionTools.h"
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#include "Algebras/FText/FTextAlgebra.h"
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#include "ScalingEngine.h"
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using namespace std;
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// --- Constructors
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// Default-Constructor
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ShpFileReader::ShpFileReader ()
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{
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// please, use the other constructor instead
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assert (false);
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}
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// Constructor
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ShpFileReader::ShpFileReader (const ListExpr allowedType1, const FText* fname) {
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int allowedType = -1;
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if (listutils::isSymbol (allowedType1,Point::BasicType ())) {
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allowedType=1;
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//} else if (listutils::isSymbol (allowedType1,Line::BasicType ())) {
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} else if (listutils::isSymbol (allowedType1,SimpleLine::BasicType ())) {
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allowedType=3;
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} else if (listutils::isSymbol (allowedType1,Region::BasicType ())) {
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allowedType=5;
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} else if (listutils::isSymbol (allowedType1,Points::BasicType ())) {
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allowedType=8;
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}
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if (!fname->IsDefined ()) {
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defined = false;
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} else {
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defined = true;
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string name = fname->GetValue ();
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file.open (name.c_str (),ios::binary);
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if (!file.good ()) {
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defined = false;
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file.close ();
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} else {
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defined = readHeader (allowedType);
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if (!defined) {
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file.close ();
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} else {
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file.seekg (100,ios::beg); // to the first data set
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}
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}
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}
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}
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// Destructor
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ShpFileReader::~ShpFileReader ()
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{
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// empty
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}
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// --- Methods
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void ShpFileReader::close () {
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if (defined) {
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file.close ();
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defined = false;
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}
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}
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Attribute* ShpFileReader::getNext () {
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if (!defined) {
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return 0;
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}
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switch (type) {
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case 1: return getNextPoint ();
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//case 3: return getNextLine ();
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case 3: return getNextSimpleLine ();
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case 5: return getNextPolygon ();
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case 8: return getNextMultiPoint ();
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default: return 0;
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}
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}
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Attribute* ShpFileReader::getNextSimpleLine () {
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uint32_t len = 0;
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uint32_t type = 0;
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uint32_t numParts = 0;
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uint32_t numPoints = 0;
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uint32_t part = 0;
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int numElems = 0;
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int jStart = 0;
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int jEnd = 0;
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int numEdges = -1;
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unsigned int i = 0;
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int j = 0;
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double x = 0.;
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double y = 0.;
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vector<int> parts;
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SimpleLine* line = NULL;
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Point startPoint;
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Point endPoint;
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Point p1;
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Point p2;
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HalfSegment hs;
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// Testing if the file is empty
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if (file.tellg ()==fileend) {
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return 0;
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}
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// Skipping recNo
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readBigInt32 ();
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// Fetching the length
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len = readBigInt32 ();
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// Yielding the type
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type = readLittleInt32 ();
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// --- Checking the type
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if (type == 0) {
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if (len != 2) {
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cerr << "Error in file detected" << endl;
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file.close ();
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defined = false;
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return 0;
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} else {
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return new SimpleLine (1);
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}
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}
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// a non-null line
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if (type != 3) {
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cerr << "Error in file detected" << endl;
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file.close ();
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defined = false;
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return 0;
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}
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// --- Ignoring box
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readLittleDouble ();
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readLittleDouble ();
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readLittleDouble ();
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readLittleDouble ();
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// --- Getting the number of parts (lines) and the number of points
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numParts = readLittleInt32 ();
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numPoints = readLittleInt32 ();
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// Collecting the parts (start of line indexes)
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for (i = 0; i < numParts && file.good () ; ++i) {
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part = readLittleInt32 ();
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parts.push_back (part);
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}
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// Testing whether an error occurred
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if (!file.good ()) {
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cerr << "error in reading file" << endl;
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file.close ();
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defined = false;
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return 0;
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}
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// Preparing the geometric structure
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line = new SimpleLine (numPoints);
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// --- Inserting the data
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line->StartBulkLoad ();
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for (i = 0; i < parts.size () && file.good (); ++i) {
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jStart = numElems;
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jEnd = (i == parts.size () - 1)? numPoints : parts[i + 1];
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for (j = jStart; j < jEnd && file.good () ; ++j) {
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x = readLittleDouble () *
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ScalingEngine::getInstance ().getScaleFactorX ();
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y = readLittleDouble () *
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ScalingEngine::getInstance ().getScaleFactorY ();
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p2.Set (x,y);
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if (j > jStart) {
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if (!AlmostEqual (p1,p2)) {
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hs.Set ( true, p1, p2 );
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hs.attr.edgeno = ++numEdges;
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(*line) += hs;
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hs.SetLeftDomPoint ( !hs.IsLeftDomPoint () );
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(*line) += hs;
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}
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// Storing the end point of the polyline
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//if (i == parts.size () - 1 && j == jEnd - 1) {
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// endPoint.Set(x, y);
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//}
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// Storing the end point of the polyline (considering circles)
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if (!AlmostEqual (startPoint, p2)) {
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endPoint.Set(x, y);
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}
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} else {
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// Storing the start point of the polyline
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if (i == 0 /*&& j == jStart*/) {
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startPoint.Set (x, y);
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}
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}
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p1 = p2;
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++numElems;
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}
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}
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line->EndBulkLoad ();
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if (startPoint < endPoint) {
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line->SetStartSmaller (true);
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} else if (startPoint > endPoint) {
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line->SetStartSmaller (false);
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} else {
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// street only consists of almost equal points
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assert (false);
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}
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// Checking if errors occurred
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if (!file.good ()) {
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cerr << "Error in reading file" << endl;
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delete line;
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file.close ();
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defined = false;
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return 0;
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}
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return line;
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}
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Attribute* ShpFileReader::getNextLine () {
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uint32_t len = 0;
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uint32_t type = 0;
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uint32_t numParts = 0;
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uint32_t numPoints = 0;
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uint32_t part = 0;
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int numElems = 0;
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int jStart = 0;
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int jEnd = 0;
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int numEdges = -1;
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unsigned int i = 0;
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int j = 0;
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double x = 0.;
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double y = 0.;
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vector<int> parts;
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Line* line = NULL;
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Point p1;
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Point p2;
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HalfSegment hs;
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// Testing if the file is empty
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if (file.tellg ()==fileend) {
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return 0;
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}
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// Skipping recNo
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readBigInt32 ();
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// Fetching the length
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len = readBigInt32 ();
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// Yielding the type
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type = readLittleInt32 ();
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// --- Checking the type
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if (type == 0) {
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if (len != 2) {
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cerr << "Error in file detected" << endl;
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file.close ();
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defined = false;
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return 0;
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} else {
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return new Line (1);
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}
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}
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// a non-null line
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if (type != 3) {
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cerr << "Error in file detected" << endl;
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file.close ();
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defined = false;
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return 0;
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}
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// --- Ignoring box
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readLittleDouble ();
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readLittleDouble ();
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readLittleDouble ();
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readLittleDouble ();
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// --- Getting the number of parts (lines) and the number of points
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numParts = readLittleInt32 ();
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numPoints = readLittleInt32 ();
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// Collecting the parts (start of line indexes)
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for (i = 0; i < numParts && file.good () ; ++i) {
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part = readLittleInt32 ();
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parts.push_back (part);
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}
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// Testing whether an error occurred
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if (!file.good ()) {
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cerr << "error in reading file" << endl;
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file.close ();
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defined = false;
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return 0;
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}
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// Preparing the geometric structure
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line = new Line (numPoints);
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// --- Inserting the data
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line->StartBulkLoad ();
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for (i = 0; i < parts.size () && file.good (); ++i) {
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jStart = numElems;
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jEnd = (i == parts.size () - 1)? numPoints : parts[i + 1];
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for (j = jStart; j < jEnd && file.good () ; ++j) {
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x = readLittleDouble ();
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y = readLittleDouble ();
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p2.Set (x,y);
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if (j > jStart) {
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if (!AlmostEqual (p1,p2)) {
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hs.Set ( true, p1, p2 );
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hs.attr.edgeno = ++numEdges;
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(*line) += hs;
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hs.SetLeftDomPoint ( !hs.IsLeftDomPoint () );
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(*line) += hs;
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}
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}
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p1 = p2;
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++numElems;
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}
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}
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line->EndBulkLoad ();
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// Checking if errors occurred
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if (!file.good ()) {
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cerr << "Error in reading file" << endl;
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delete line;
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file.close ();
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defined = false;
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return 0;
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}
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return line;
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}
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Attribute* ShpFileReader::getNextPoint () {
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uint32_t recLen = 0;
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uint32_t type = 0;
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double x = 0.;
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double y = 0.;
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if (file.tellg () == fileend) {
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return 0;
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}
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// Skipping the record number
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readBigInt32 ();
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recLen = readBigInt32 ();
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type = readLittleInt32 ();
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if (type == 0) { // null shape
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if (recLen!=2 || !file.good ()) {
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cerr << "Error in shape file detected " << __LINE__ << endl;
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defined = false;
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file.close ();
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return 0;
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} else {
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return new Point (false,0,0);
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}
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}
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if (type != 1 || recLen != 10) {
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cerr << "Error in shape file detected " << __LINE__ << endl;
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defined = false;
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file.close ();
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return 0;
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}
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x = readLittleDouble () *
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ScalingEngine::getInstance ().getScaleFactorX ();
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y = readLittleDouble () *
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ScalingEngine::getInstance ().getScaleFactorY ();
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if (!file.good ()) {
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cerr << "Error in shape file detected " << __LINE__ << endl;
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defined = false;
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file.close ();
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return 0;
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}
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return new Point (true,x,y);
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}
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Attribute* ShpFileReader::getNextMultiPoint () {
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uint32_t recNo = 0;
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uint32_t len = 0;
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uint32_t type = 0;
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uint32_t numPoints = 0;
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uint32_t expectedLen = 0;
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Points* ps = NULL;
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Point p;
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if (file.tellg ()==fileend) {
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return 0;
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}
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recNo = readBigInt32 ();
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len = readBigInt32 ();
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type = readLittleInt32 ();
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if (!file.good ()) {
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cerr << " problem in reading file " << __LINE__ << endl;
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cerr << "recNo = " << recNo << endl;
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cerr << "len = " << len << endl;
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cerr << "type = " << type << endl;
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defined = false;
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return 0;
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}
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if (type==0) {
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if (len!=2) {
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cerr << "Error in shape file detected " << __LINE__ << endl;
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defined = false;
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file.close ();
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return 0;
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} else {
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return new Points (1);
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}
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}
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if (type!=8) {
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cerr << "Error in shape file detected " << __LINE__ << endl;
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cout << "type = " << type << endl;
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cout << "file.good = " << file.good () << endl;
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defined = false;
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file.close ();
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return 0;
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}
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// ignore Bounding box
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readLittleDouble ();
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readLittleDouble ();
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readLittleDouble ();
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readLittleDouble ();
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numPoints = readLittleInt32 ();
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expectedLen = (40 + numPoints*16) / 2;
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if (len != (expectedLen)) {
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cerr << "Error in file " << __LINE__ << endl;
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cerr << "len = " << len << endl;
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cerr << "numPoints " << numPoints << endl;
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cerr << " expected" << expectedLen << endl;
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file.close ();
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defined = false;
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return 0;
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}
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ps = new Points (numPoints);
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ps->StartBulkLoad ();
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for (unsigned int i=0;i<numPoints && file.good ();i++) {
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double x = readLittleDouble ();
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double y = readLittleDouble ();
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p.Set (x,y);
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(*ps) += p;
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}
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ps->EndBulkLoad ();
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if (!file.good ()) {
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cerr << "Error in file " << __LINE__ << endl;
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delete ps;
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return 0;
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} else {
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return ps;
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}
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}
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Attribute* ShpFileReader::getNextPolygon () {
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uint32_t clen = 0;
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uint32_t pos = 0;
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uint32_t start = 0;
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uint32_t end = 0;
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uint32_t numParts = 0;
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uint32_t numPoints = 0;
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uint32_t len = 0;
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uint32_t type = 0;
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unsigned int iPart = 0;
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unsigned int c = 0;
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double x = 0.;
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double y = 0.;
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vector<uint32_t> parts;
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vector<vector <Point> > cycles;
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if (file.tellg ()==fileend) { // end of file reached
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return 0;
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}
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readBigInt32 (); // ignore record number
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len = readBigInt32 ();
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type = readLittleInt32 ();
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if (type==0) {
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if (len!=2) {
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cerr << "Error in file detected" << __LINE__ << endl;
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file.close ();
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defined = false;
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return 0;
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} else { // NULL shape, return an empty region
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return new Region (0);
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}
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}
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if (type!=5) { // different shapes are not allowed
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cerr << "Error in file detected" << __LINE__ << endl;
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cerr << "Expected Type = 5, but got type: " << type << endl;
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file.close ();
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defined = false;
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return 0;
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}
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// ignore box
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readLittleDouble ();
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readLittleDouble ();
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readLittleDouble ();
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readLittleDouble ();
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numParts = readLittleInt32 ();
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numPoints = readLittleInt32 ();
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// for debugging the file
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clen = (44 + 4*numParts + 16*numPoints)/2;
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if (clen!=len) {
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cerr << "File invalid: length given in header seems to be wrong"
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<< endl;
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file.close ();
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defined = false;
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return 0;
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}
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// read the starts of the cycles
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for (iPart = 0; iPart < numParts; ++iPart) {
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parts.push_back (readLittleInt32 ());
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}
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// read the cycles
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for (iPart = 0;iPart < numParts; ++iPart) {
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vector<Point> cycle;
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start = pos;
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end = iPart< (numParts - 1) ? parts[iPart + 1]:numPoints;
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Point lastPoint (true,0.0,0.0);
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// read a single cycle
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for (c = start; c < end; ++c) {
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x = readLittleDouble ();
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y = readLittleDouble ();
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Point point (true,x,y);
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if (c==start) { // the first point
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cycle.push_back (point);
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lastPoint = point;
|
|
} else if (!AlmostEqual (lastPoint,point)) {
|
|
cycle.push_back (point);
|
|
lastPoint = point;
|
|
}
|
|
++pos;
|
|
}
|
|
cycles.push_back (cycle);
|
|
}
|
|
return buildRegion (cycles);
|
|
}
|
|
|
|
bool ShpFileReader::readHeader (unsigned int allowedType) {
|
|
uint32_t code;
|
|
uint32_t version;
|
|
file.seekg (0,ios::end);
|
|
streampos p = file.tellg ();
|
|
fileend = p;
|
|
if (p< 100) { // minimum size not reached
|
|
return false;
|
|
}
|
|
file.seekg (0,ios::beg);
|
|
file.read (reinterpret_cast<char*>(&code),4);
|
|
file.seekg (28,ios::beg);
|
|
file.read (reinterpret_cast<char*>(&version),4);
|
|
file.read (reinterpret_cast<char*>(&type),4);
|
|
if (WinUnix::isLittleEndian ()) {
|
|
code = WinUnix::convertEndian (code);
|
|
} else {
|
|
version = WinUnix::convertEndian (version);
|
|
type = WinUnix::convertEndian (type);
|
|
}
|
|
if (code!=9994) {
|
|
return false;
|
|
}
|
|
if (version != 1000) {
|
|
return false;
|
|
}
|
|
return type==allowedType;
|
|
}
|
|
|
|
uint32_t ShpFileReader::readBigInt32 () {
|
|
uint32_t res;
|
|
file.read (reinterpret_cast<char*>(&res),4);
|
|
if (WinUnix::isLittleEndian ()) {
|
|
res = WinUnix::convertEndian (res);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
uint32_t ShpFileReader::readLittleInt32 () {
|
|
uint32_t res;
|
|
file.read (reinterpret_cast<char*>(&res),4);
|
|
if (!WinUnix::isLittleEndian ()) {
|
|
res = WinUnix::convertEndian (res);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
double ShpFileReader::readLittleDouble () {
|
|
uint64_t tmp;
|
|
double res;
|
|
file.read (reinterpret_cast<char*>(&tmp),8);
|
|
if (!WinUnix::isLittleEndian ()) {
|
|
tmp = WinUnix::convertEndian (tmp);
|
|
}
|
|
void * d = &tmp;
|
|
res = * (reinterpret_cast<double*>(d));
|
|
return res;
|
|
}
|
|
|
|
string ShpFileReader::getShpType(const string fname, bool& correct,
|
|
string& errorMessage) {
|
|
correct = false;
|
|
if(fname.length()==0){
|
|
errorMessage = "invalid filename";
|
|
return "";
|
|
}
|
|
|
|
ifstream f(fname.c_str(),std::ios::binary);
|
|
if(!f.good()){
|
|
errorMessage = "problem in reading file";
|
|
return "";
|
|
}
|
|
|
|
f.seekg(0,ios::end);
|
|
streampos flen = f.tellg();
|
|
if(flen < 100){
|
|
errorMessage = "not a valid shape file";
|
|
f.close();
|
|
return "";
|
|
}
|
|
|
|
|
|
f.seekg(0,ios::beg);
|
|
uint32_t code = 0;
|
|
f.read(reinterpret_cast<char*>(&code),4);
|
|
if(WinUnix::isLittleEndian()){
|
|
code = WinUnix::convertEndian(code);
|
|
}
|
|
if(code!=9994){
|
|
errorMessage = "invalid file code detected";
|
|
f.close();
|
|
return "";
|
|
}
|
|
|
|
uint32_t version;
|
|
f.seekg(28,ios::beg);
|
|
f.read(reinterpret_cast<char*>(&version),4);
|
|
if(!WinUnix::isLittleEndian()){
|
|
version = WinUnix::convertEndian(version);
|
|
}
|
|
if(version != 1000){
|
|
errorMessage = "invalid version detected";
|
|
f.close();
|
|
return "";
|
|
}
|
|
uint32_t type;
|
|
f.read(reinterpret_cast<char*>(&type),4);
|
|
if(!WinUnix::isLittleEndian()){
|
|
type = WinUnix::convertEndian(type);
|
|
}
|
|
f.close();
|
|
|
|
switch(type){
|
|
case 0 : { errorMessage = "null shape, no corresponding secondo type";
|
|
return "";
|
|
}
|
|
case 1 : { correct = true;
|
|
return Point::BasicType();
|
|
}
|
|
case 3 : { correct = true;
|
|
return SimpleLine::BasicType();
|
|
}
|
|
case 5 : { correct = true;
|
|
return Region::BasicType();
|
|
}
|
|
case 8 : { correct = true;
|
|
return Points::BasicType();
|
|
}
|
|
case 11 : { errorMessage = "PointZ, no corresponding secondo type";
|
|
return "";
|
|
}
|
|
case 13 : { errorMessage = ("PolyLineZ, no corresponding secondo type");
|
|
return "";
|
|
}
|
|
case 15 : { errorMessage = ("PolygonZ, no corresponding secondo type");
|
|
return "";
|
|
}
|
|
case 18 : { errorMessage=("MultiPointZ, no corresponding secondo type");
|
|
return "";
|
|
}
|
|
case 21 : { errorMessage=("PointM, no corresponding secondo type");
|
|
return "";
|
|
}
|
|
case 23 : { errorMessage =("PolyLineM, no corresponding secondo type");
|
|
return "";
|
|
}
|
|
case 25 : {errorMessage=("PolygonM, no corresponding secondo type");
|
|
return "";
|
|
}
|
|
case 28 : { errorMessage=("MultiPointM, no corresponding secondo type");
|
|
return "";
|
|
}
|
|
case 31 : { errorMessage = ("MultiPatch, no corresponding secondo type");
|
|
return "";
|
|
}
|
|
default : errorMessage = " not a valid shape type";
|
|
return "";
|
|
}
|
|
|
|
}
|