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80 lines
3.2 KiB
80 lines
3.2 KiB
/* tsplib.h */
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/* Written by Andrew Makhorin <mao@gnu.org>, October 2015. */
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#ifndef TSPLIB_H
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#define TSPLIB_H
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typedef struct TSP TSP;
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struct TSP
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{ /* TSP (or related problem) instance in the format described in
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* [G.Reinelt, TSPLIB 95] */
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/*--------------------------------------------------------------*/
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/* specification part */
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char *name;
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/* identifies the data file */
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int type;
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/* specifies the type of data: */
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#define TSP_UNDEF 0 /* undefined */
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#define TSP_TSP 1 /* symmetric TSP */
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#define TSP_ATSP 2 /* asymmetric TSP */
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#define TSP_TOUR 3 /* collection of tours */
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char *comment;
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/* additional comments (usually the name of the contributor or
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* creator of the problem instance is given here) */
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int dimension;
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/* for a TSP or ATSP, the dimension is the number of its nodes
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* for a TOUR it is the dimension of the corresponding problem */
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int edge_weight_type;
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/* specifies how the edge weights (or distances) are given: */
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#define TSP_UNDEF 0 /* undefined */
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#define TSP_EXPLICIT 1 /* listed explicitly */
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#define TSP_EUC_2D 2 /* Eucl. distances in 2-D */
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#define TSP_CEIL_2D 3 /* Eucl. distances in 2-D rounded up */
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#define TSP_GEO 4 /* geographical distances */
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#define TSP_ATT 5 /* special distance function */
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int edge_weight_format;
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/* describes the format of the edge weights if they are given
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* explicitly: */
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#define TSP_UNDEF 0 /* undefined */
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#define TSP_FUNCTION 1 /* given by a function */
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#define TSP_FULL_MATRIX 2 /* given by a full matrix */
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#define TSP_UPPER_ROW 3 /* upper triangulat matrix (row-wise
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* without diagonal entries) */
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#define TSP_LOWER_DIAG_ROW 4 /* lower triangular matrix (row-wise
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* including diagonal entries) */
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int display_data_type;
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/* specifies how a graphical display of the nodes can be
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* obtained: */
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#define TSP_UNDEF 0 /* undefined */
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#define TSP_COORD_DISPLAY 1 /* display is generated from the node
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* coordinates */
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#define TSP_TWOD_DISPLAY 2 /* explicit coordinates in 2-D are
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* given */
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/*--------------------------------------------------------------*/
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/* data part */
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/* NODE_COORD_SECTION: */
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double *node_x_coord; /* double node_x_coord[1+dimension]; */
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double *node_y_coord; /* double node_y_coord[1+dimension]; */
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/* DISPLAY_DATA_SECTION: */
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double *dply_x_coord; /* double dply_x_coord[1+dimension]; */
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double *dply_y_coord; /* double dply_y_coord[1+dimension]; */
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/* TOUR_SECTION: */
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int *tour; /* int tour[1+dimension]; */
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/* EDGE_WEIGHT_SECTION: */
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int *edge_weight; /* int edge_weight[1+dimension*dimension]; */
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};
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TSP *tsp_read_data(const char *fname);
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/* read TSP instance data */
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int tsp_distance(const TSP *tsp, int i, int j);
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/* compute distance between two nodes */
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void tsp_free_data(TSP *tsp);
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/* free TSP instance data */
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#endif
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/* eof */
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