1 | #region License Information
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2 | /* HeuristicLab
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3 | * Copyright (C) 2002-2011 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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4 | *
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5 | * This file is part of HeuristicLab.
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6 | *
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7 | * HeuristicLab is free software: you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation, either version 3 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * HeuristicLab is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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19 | */
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20 | #endregion
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21 |
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22 | using System;
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23 | using System.IO;
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24 |
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25 | namespace HeuristicLab.Problems.QuadraticAssignment {
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26 | public class QAPLIBParser {
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27 | public int Size { get; private set; }
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28 | public double[,] Distances { get; private set; }
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29 | public double[,] Weights { get; private set; }
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30 | public Exception Error { get; private set; }
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31 |
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32 | public QAPLIBParser() {
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33 | Reset();
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34 | }
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35 |
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36 | public void Reset() {
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37 | Size = 0;
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38 | Distances = null;
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39 | Weights = null;
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40 | Error = null;
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41 | }
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42 |
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43 | public bool Parse(string file) {
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44 | using (Stream stream = new FileStream(file, FileMode.Open, FileAccess.Read)) {
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45 | return Parse(stream);
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46 | }
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47 | }
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48 |
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49 | /// <summary>
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50 | /// Reads from the given stream data which is expected to be in the QAPLIB format.
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51 | /// </summary>
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52 | /// <remarks>
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53 | /// The stream is not closed or disposed. The caller has to take care of that.
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54 | /// </remarks>
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55 | /// <param name="stream">The stream to read data from.</param>
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56 | /// <returns>True if the file was successfully read or false otherwise.</returns>
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57 | public bool Parse(Stream stream) {
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58 | Error = null;
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59 | try {
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60 | StreamReader reader = new StreamReader(stream);
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61 | Size = int.Parse(reader.ReadLine());
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62 | Distances = new double[Size, Size];
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63 | Weights = new double[Size, Size];
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64 | string valLine = reader.ReadLine();
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65 | char[] delim = new char[] { ' ' };
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66 | for (int i = 0; i < Size; i++) {
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67 | if (i > 0 || String.IsNullOrWhiteSpace(valLine))
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68 | valLine = reader.ReadLine();
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69 | string[] vals = new string[Size];
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70 | string[] partVals = valLine.Split(delim, StringSplitOptions.RemoveEmptyEntries);
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71 | partVals.CopyTo(vals, 0);
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72 | int index = partVals.Length;
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73 | while (index < Size) {
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74 | valLine = reader.ReadLine();
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75 | partVals = valLine.Split(delim, StringSplitOptions.RemoveEmptyEntries);
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76 | partVals.CopyTo(vals, index);
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77 | index += partVals.Length;
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78 | }
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79 | for (int j = 0; j < Size; j++) {
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80 | Distances[i, j] = double.Parse(vals[j]);
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81 | }
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82 | }
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83 | valLine = reader.ReadLine();
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84 | int read = 0;
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85 | int k = 0;
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86 | while (!reader.EndOfStream) {
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87 | if (read > 0 || String.IsNullOrWhiteSpace(valLine))
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88 | valLine = reader.ReadLine();
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89 | string[] vals = valLine.Split(delim, StringSplitOptions.RemoveEmptyEntries);
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90 | for (int j = 0; j < vals.Length; j++) {
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91 | if (read + j == Size) {
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92 | read = 0;
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93 | k++;
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94 | }
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95 | Weights[k, read + j] = double.Parse(vals[j]);
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96 | }
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97 | read += vals.Length;
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98 | }
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99 | return true;
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100 | } catch (Exception e) {
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101 | Error = e;
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102 | return false;
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103 | }
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104 | }
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105 | }
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106 | }
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