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