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1 /* glptsp.h (TSP format) */ |
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2 |
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3 /*********************************************************************** |
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4 * This code is part of GLPK (GNU Linear Programming Kit). |
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5 * |
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6 * Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, |
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7 * 2009, 2010 Andrew Makhorin, Department for Applied Informatics, |
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8 * Moscow Aviation Institute, Moscow, Russia. All rights reserved. |
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9 * E-mail: <mao@gnu.org>. |
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10 * |
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11 * GLPK is free software: you can redistribute it and/or modify it |
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12 * under the terms of the GNU General Public License as published by |
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13 * the Free Software Foundation, either version 3 of the License, or |
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14 * (at your option) any later version. |
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15 * |
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16 * GLPK is distributed in the hope that it will be useful, but WITHOUT |
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17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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18 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
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19 * License for more details. |
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20 * |
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21 * You should have received a copy of the GNU General Public License |
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22 * along with GLPK. If not, see <http://www.gnu.org/licenses/>. |
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23 ***********************************************************************/ |
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24 |
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25 #ifndef GLPTSP_H |
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26 #define GLPTSP_H |
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27 |
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28 typedef struct TSP TSP; |
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29 |
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30 struct TSP |
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31 { /* TSP (or related problem) instance in the format described in |
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32 the report [G.Reinelt, TSPLIB 95] */ |
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33 /*--------------------------------------------------------------*/ |
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34 /* the specification part */ |
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35 char *name; |
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36 /* identifies the data file */ |
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37 int type; |
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38 /* specifies the type of data: */ |
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39 #define TSP_UNDEF 0 /* undefined */ |
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40 #define TSP_TSP 1 /* symmetric TSP */ |
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41 #define TSP_ATSP 2 /* asymmetric TSP */ |
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42 #define TSP_TOUR 3 /* collection of tours */ |
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43 char *comment; |
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44 /* additional comments (usually the name of the contributor or |
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45 creator of the problem instance is given here) */ |
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46 int dimension; |
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47 /* for a TSP or ATSP, the dimension is the number of its nodes |
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48 for a TOUR it is the dimension of the corresponding problem */ |
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49 int edge_weight_type; |
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50 /* specifies how the edge weights (or distances) are given: */ |
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51 #define TSP_UNDEF 0 /* undefined */ |
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52 #define TSP_EXPLICIT 1 /* listed explicitly */ |
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53 #define TSP_EUC_2D 2 /* Eucl. distances in 2-D */ |
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54 #define TSP_CEIL_2D 3 /* Eucl. distances in 2-D rounded up */ |
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55 #define TSP_GEO 4 /* geographical distances */ |
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56 #define TSP_ATT 5 /* special distance function */ |
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57 int edge_weight_format; |
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58 /* describes the format of the edge weights if they are given |
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59 explicitly: */ |
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60 #define TSP_UNDEF 0 /* undefined */ |
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61 #define TSP_FUNCTION 1 /* given by a function */ |
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62 #define TSP_FULL_MATRIX 2 /* given by a full matrix */ |
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63 #define TSP_UPPER_ROW 3 /* upper triangulat matrix (row-wise |
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64 without diagonal entries) */ |
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65 #define TSP_LOWER_DIAG_ROW 4 /* lower triangular matrix (row-wise |
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66 including diagonal entries) */ |
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67 int display_data_type; |
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68 /* specifies how a graphical display of the nodes can be |
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69 obtained: */ |
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70 #define TSP_UNDEF 0 /* undefined */ |
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71 #define TSP_COORD_DISPLAY 1 /* display is generated from the node |
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72 coordinates */ |
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73 #define TSP_TWOD_DISPLAY 2 /* explicit coordinates in 2-D are |
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74 given */ |
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75 /*--------------------------------------------------------------*/ |
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76 /* data part */ |
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77 /* NODE_COORD_SECTION: */ |
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78 double *node_x_coord; /* double node_x_coord[1+dimension]; */ |
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79 double *node_y_coord; /* double node_y_coord[1+dimension]; */ |
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80 /* DISPLAY_DATA_SECTION: */ |
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81 double *dply_x_coord; /* double dply_x_coord[1+dimension]; */ |
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82 double *dply_y_coord; /* double dply_y_coord[1+dimension]; */ |
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83 /* TOUR_SECTION: */ |
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84 int *tour; /* int tour[1+dimension]; */ |
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85 /* EDGE_WEIGHT_SECTION: */ |
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86 int *edge_weight; /* int edge_weight[1+dimension*dimension]; */ |
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87 }; |
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88 |
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89 #define tsp_read_data _glp_tsp_read_data |
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90 #define tsp_free_data _glp_tsp_free_data |
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91 #define tsp_distance _glp_tsp_distance |
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92 |
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93 TSP *tsp_read_data(char *fname); |
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94 /* read TSP instance data */ |
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95 |
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96 void tsp_free_data(TSP *tsp); |
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97 /* free TSP instance data */ |
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98 |
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99 int tsp_distance(TSP *tsp, int i, int j); |
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100 /* compute distance between two nodes */ |
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101 |
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102 #endif |
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103 |
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104 /* eof */ |