1 | using System;
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2 | using System.IO;
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3 | using HeuristicLab.Problems.RoutePlanning.Interfaces;
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4 | using HeuristicLab.Problems.RoutePlanning.RoutingGraph;
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5 | using ICSharpCode.SharpZipLib.GZip;
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6 |
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7 | namespace HeuristicLab.Problems.RoutePlanning.Data.DIMACS {
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8 | public class DIMACSDataSource : IDataSource {
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9 | FileInfo graphFile;
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10 | FileInfo coordinatesFile;
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11 |
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12 | IGraph graph;
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13 |
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14 | public DIMACSDataSource(string coordinates, string inputgraph) {
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15 | coordinatesFile = new FileInfo(coordinates);
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16 | graphFile = new FileInfo(inputgraph);
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17 | graph = new Graph();
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18 | ReadData();
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19 | }
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20 |
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21 | #region IDataSource Members
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22 |
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23 | public IGraph GetRoutingGraph() {
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24 | return graph;
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25 | }
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26 |
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27 | #endregion
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28 |
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29 | #region Private Methods
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30 |
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31 | private void ReadData() {
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32 | using (FileStream fs = File.OpenRead(coordinatesFile.FullName))
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33 | using (GZipInputStream input = new GZipInputStream(fs)) {
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34 | string s = "";
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35 |
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36 | int i;
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37 |
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38 | while ((i = input.ReadByte()) != -1) {
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39 | char c = (char)i;
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40 | if (c == '\r' || c == '\n') {
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41 | if (s.StartsWith("c")) {
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42 | if (s.Length > 1) {
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43 | // comment
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44 | Console.WriteLine(s);
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45 | }
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46 | } else if (s.StartsWith("p")) {
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47 | string[] line = s.Split(' ');
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48 | if (line[1] == "aux" && line[2] == "sp" && line[3] == "co") {
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49 | int vertices = int.Parse(line[4]);
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50 | Console.WriteLine("vertices: {0}", vertices);
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51 | } else {
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52 | throw new ArgumentException("Wrong problem format");
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53 | }
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54 | } else if (s.StartsWith("v")) {
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55 | string[] line = s.Split(' ');
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56 |
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57 | long id = int.Parse(line[1]);
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58 | double lon = double.Parse(line[2]);
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59 | double lat = double.Parse(line[3]);
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60 |
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61 | Vertex v = new Vertex(id, lon, lat);
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62 | graph.AddVertex(v);
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63 | }
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64 | s = string.Empty;
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65 | } else {
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66 | s += c;
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67 | }
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68 | }
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69 | }
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70 |
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71 |
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72 | using (FileStream fs = File.OpenRead(graphFile.FullName))
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73 | using (GZipInputStream input = new GZipInputStream(fs)) {
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74 | string s = "";
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75 |
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76 | int i;
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77 |
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78 | while ((i = input.ReadByte()) != -1) {
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79 | char c = (char)i;
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80 | if (c == '\r' || c == '\n') {
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81 | if (s.StartsWith("c")) {
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82 | if (s.Length > 1) {
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83 | // comment
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84 | Console.WriteLine(s);
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85 | }
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86 | } else if (s.StartsWith("p")) {
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87 | string[] line = s.Split(' ');
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88 | if (line[1] == "sp") {
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89 | int vertices = int.Parse(line[2]);
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90 | int edges = int.Parse(line[3]);
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91 | Console.WriteLine("vertices: {0}; edges: {1}", vertices, edges);
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92 | } else {
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93 | throw new ArgumentException("Wrong problem format");
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94 | }
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95 | } else if (s.StartsWith("a")) {
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96 | string[] line = s.Split(' ');
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97 |
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98 | long src = int.Parse(line[1]);
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99 | long dst = int.Parse(line[2]);
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100 | int len = int.Parse(line[3]);
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101 |
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102 | Vertex vSrc = graph.GetVertex(src);
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103 | Vertex vDst = graph.GetVertex(dst);
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104 |
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105 | Edge<Vertex> edge = new Edge<Vertex>(vSrc, vDst);
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106 | edge.Weight = len;
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107 |
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108 | graph.AddEdge(edge);
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109 |
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110 | }
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111 | s = string.Empty;
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112 | } else {
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113 | s += c;
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114 | }
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115 | }
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116 | }
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117 | }
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118 |
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119 | #endregion
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120 | }
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121 | }
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