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alpar@9
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1 /* glptsp.c */
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2
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alpar@9
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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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alpar@9
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6 * Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
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alpar@9
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7 * 2009, 2010, 2011 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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alpar@9
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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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alpar@9
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15 *
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alpar@9
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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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alpar@9
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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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alpar@9
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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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alpar@9
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22 * along with GLPK. If not, see <http://www.gnu.org/licenses/>.
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alpar@9
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23 ***********************************************************************/
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24
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alpar@9
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25 #define _GLPSTD_ERRNO
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alpar@9
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26 #define _GLPSTD_STDIO
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alpar@9
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27 #include "glpenv.h"
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alpar@9
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28 #include "glptsp.h"
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alpar@9
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29 #define xfault xerror
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alpar@9
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30
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alpar@9
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31 /*----------------------------------------------------------------------
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alpar@9
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32 -- tsp_read_data - read TSP instance data.
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alpar@9
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33 --
|
alpar@9
|
34 -- *Synopsis*
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alpar@9
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35 --
|
alpar@9
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36 -- #include "glptsp.h"
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alpar@9
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37 -- TSP *tsp_read_data(char *fname);
|
alpar@9
|
38 --
|
alpar@9
|
39 -- *Description*
|
alpar@9
|
40 --
|
alpar@9
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41 -- The routine tsp_read_data reads a TSP (or related problem) instance
|
alpar@9
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42 -- data from the text file, whose name is the character string fname.
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alpar@9
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43 --
|
alpar@9
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44 -- For detailed description of the format recognized by the routine see
|
alpar@9
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45 -- the report: G.Reinelt, TSPLIB 95.
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alpar@9
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46 --
|
alpar@9
|
47 -- *Returns*
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alpar@9
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48 --
|
alpar@9
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49 -- If no error occurred, the routine tsp_read_data returns a pointer to
|
alpar@9
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50 -- the TSP instance data block, which contains loaded data. In the case
|
alpar@9
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51 -- of error the routine prints an error message and returns NULL. */
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alpar@9
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52
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alpar@9
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53 struct dsa
|
alpar@9
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54 { /* dynamic storage area used by the routine tsp_read_data */
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alpar@9
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55 char *fname;
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alpar@9
|
56 /* name of the input text file */
|
alpar@9
|
57 FILE *fp;
|
alpar@9
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58 /* stream assigned to the input text file */
|
alpar@9
|
59 int seqn;
|
alpar@9
|
60 /* line sequential number */
|
alpar@9
|
61 int c;
|
alpar@9
|
62 /* current character */
|
alpar@9
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63 char token[255+1];
|
alpar@9
|
64 /* current token */
|
alpar@9
|
65 };
|
alpar@9
|
66
|
alpar@9
|
67 static int get_char(struct dsa *dsa)
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alpar@9
|
68 { dsa->c = fgetc(dsa->fp);
|
alpar@9
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69 if (ferror(dsa->fp))
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alpar@9
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70 { xprintf("%s:%d: read error - %s\n",
|
alpar@9
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71 dsa->fname, dsa->seqn, strerror(errno));
|
alpar@9
|
72 return 1;
|
alpar@9
|
73 }
|
alpar@9
|
74 if (feof(dsa->fp))
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alpar@9
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75 dsa->c = EOF;
|
alpar@9
|
76 else if (dsa->c == '\n')
|
alpar@9
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77 dsa->seqn++;
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alpar@9
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78 else if (isspace(dsa->c))
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alpar@9
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79 dsa->c = ' ';
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alpar@9
|
80 else if (iscntrl(dsa->c))
|
alpar@9
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81 { xprintf("%s:%d: invalid control character 0x%02X\n",
|
alpar@9
|
82 dsa->fname, dsa->seqn, dsa->c);
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alpar@9
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83 return 1;
|
alpar@9
|
84 }
|
alpar@9
|
85 return 0;
|
alpar@9
|
86 }
|
alpar@9
|
87
|
alpar@9
|
88 static int skip_spaces(struct dsa *dsa, int across)
|
alpar@9
|
89 { while (dsa->c == ' ' || (across && dsa->c == '\n'))
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alpar@9
|
90 if (get_char(dsa)) return 1;
|
alpar@9
|
91 return 0;
|
alpar@9
|
92 }
|
alpar@9
|
93
|
alpar@9
|
94 static int scan_keyword(struct dsa *dsa)
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alpar@9
|
95 { int len = 0;
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alpar@9
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96 if (skip_spaces(dsa, 0)) return 1;
|
alpar@9
|
97 dsa->token[0] = '\0';
|
alpar@9
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98 while (isalnum(dsa->c) || dsa->c == '_')
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alpar@9
|
99 { if (len == 31)
|
alpar@9
|
100 { xprintf("%s:%d: keyword `%s...' too long\n", dsa->fname,
|
alpar@9
|
101 dsa->seqn, dsa->token);
|
alpar@9
|
102 return 1;
|
alpar@9
|
103 }
|
alpar@9
|
104 dsa->token[len++] = (char)dsa->c, dsa->token[len] = '\0';
|
alpar@9
|
105 if (get_char(dsa)) return 1;
|
alpar@9
|
106 }
|
alpar@9
|
107 if (len == 0)
|
alpar@9
|
108 { xprintf("%s:%d: missing keyword\n", dsa->fname, dsa->seqn);
|
alpar@9
|
109 return 1;
|
alpar@9
|
110 }
|
alpar@9
|
111 return 0;
|
alpar@9
|
112 }
|
alpar@9
|
113
|
alpar@9
|
114 static int check_colon(struct dsa *dsa)
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alpar@9
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115 { if (skip_spaces(dsa, 0)) return 1;
|
alpar@9
|
116 if (dsa->c != ':')
|
alpar@9
|
117 { xprintf("%s:%d: missing colon after `%s'\n", dsa->fname,
|
alpar@9
|
118 dsa->seqn, dsa->token);
|
alpar@9
|
119 return 1;
|
alpar@9
|
120 }
|
alpar@9
|
121 if (get_char(dsa)) return 1;
|
alpar@9
|
122 return 0;
|
alpar@9
|
123 }
|
alpar@9
|
124
|
alpar@9
|
125 static int scan_token(struct dsa *dsa, int across)
|
alpar@9
|
126 { int len = 0;
|
alpar@9
|
127 if (skip_spaces(dsa, across)) return 1;
|
alpar@9
|
128 dsa->token[0] = '\0';
|
alpar@9
|
129 while (!(dsa->c == EOF || dsa->c == '\n' || dsa->c == ' '))
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alpar@9
|
130 { if (len == 255)
|
alpar@9
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131 { dsa->token[31] = '\0';
|
alpar@9
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132 xprintf("%s:%d: token `%s...' too long\n", dsa->fname,
|
alpar@9
|
133 dsa->seqn, dsa->token);
|
alpar@9
|
134 return 1;
|
alpar@9
|
135 }
|
alpar@9
|
136 dsa->token[len++] = (char)dsa->c, dsa->token[len] = '\0';
|
alpar@9
|
137 if (get_char(dsa)) return 1;
|
alpar@9
|
138 }
|
alpar@9
|
139 return 0;
|
alpar@9
|
140 }
|
alpar@9
|
141
|
alpar@9
|
142 static int check_newline(struct dsa *dsa)
|
alpar@9
|
143 { if (skip_spaces(dsa, 0)) return 1;
|
alpar@9
|
144 if (!(dsa->c == EOF || dsa->c == '\n'))
|
alpar@9
|
145 { xprintf("%s:%d: extra symbols detected\n", dsa->fname,
|
alpar@9
|
146 dsa->seqn);
|
alpar@9
|
147 return 1;
|
alpar@9
|
148 }
|
alpar@9
|
149 if (get_char(dsa)) return 1;
|
alpar@9
|
150 return 0;
|
alpar@9
|
151 }
|
alpar@9
|
152
|
alpar@9
|
153 static int scan_comment(struct dsa *dsa)
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alpar@9
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154 { int len = 0;
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alpar@9
|
155 if (skip_spaces(dsa, 0)) return 1;
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alpar@9
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156 dsa->token[0] = '\0';
|
alpar@9
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157 while (!(dsa->c == EOF || dsa->c == '\n'))
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alpar@9
|
158 { if (len == 255)
|
alpar@9
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159 { xprintf("%s:%d: comment too long\n", dsa->fname, dsa->seqn)
|
alpar@9
|
160 ;
|
alpar@9
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161 return 1;
|
alpar@9
|
162 }
|
alpar@9
|
163 dsa->token[len++] = (char)dsa->c, dsa->token[len] = '\0';
|
alpar@9
|
164 if (get_char(dsa)) return 1;
|
alpar@9
|
165 }
|
alpar@9
|
166 return 0;
|
alpar@9
|
167 }
|
alpar@9
|
168
|
alpar@9
|
169 static int scan_integer(struct dsa *dsa, int across, int *val)
|
alpar@9
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170 { if (scan_token(dsa, across)) return 1;
|
alpar@9
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171 if (strlen(dsa->token) == 0)
|
alpar@9
|
172 { xprintf("%s:%d: missing integer\n", dsa->fname, dsa->seqn);
|
alpar@9
|
173 return 1;
|
alpar@9
|
174 }
|
alpar@9
|
175 if (str2int(dsa->token, val))
|
alpar@9
|
176 { xprintf("%s:%d: integer `%s' invalid\n", dsa->fname, dsa->seqn
|
alpar@9
|
177 , dsa->token);
|
alpar@9
|
178 return 1;
|
alpar@9
|
179 }
|
alpar@9
|
180 return 0;
|
alpar@9
|
181 }
|
alpar@9
|
182
|
alpar@9
|
183 static int scan_number(struct dsa *dsa, int across, double *val)
|
alpar@9
|
184 { if (scan_token(dsa, across)) return 1;
|
alpar@9
|
185 if (strlen(dsa->token) == 0)
|
alpar@9
|
186 { xprintf("%s:%d: missing number\n", dsa->fname, dsa->seqn);
|
alpar@9
|
187 return 1;
|
alpar@9
|
188 }
|
alpar@9
|
189 if (str2num(dsa->token, val))
|
alpar@9
|
190 { xprintf("%s:%d: number `%s' invalid\n", dsa->fname, dsa->seqn,
|
alpar@9
|
191 dsa->token);
|
alpar@9
|
192 return 1;
|
alpar@9
|
193 }
|
alpar@9
|
194 return 0;
|
alpar@9
|
195 }
|
alpar@9
|
196
|
alpar@9
|
197 TSP *tsp_read_data(char *fname)
|
alpar@9
|
198 { struct dsa _dsa, *dsa = &_dsa;
|
alpar@9
|
199 TSP *tsp = NULL;
|
alpar@9
|
200 dsa->fname = fname;
|
alpar@9
|
201 xprintf("tsp_read_data: reading TSP data from `%s'...\n",
|
alpar@9
|
202 dsa->fname);
|
alpar@9
|
203 dsa->fp = fopen(dsa->fname, "r");
|
alpar@9
|
204 if (dsa->fp == NULL)
|
alpar@9
|
205 { xprintf("tsp_read_data: unable to open `%s' - %s\n",
|
alpar@9
|
206 dsa->fname, strerror(errno));
|
alpar@9
|
207 goto fail;
|
alpar@9
|
208 }
|
alpar@9
|
209 tsp = xmalloc(sizeof(TSP));
|
alpar@9
|
210 tsp->name = NULL;
|
alpar@9
|
211 tsp->type = TSP_UNDEF;
|
alpar@9
|
212 tsp->comment = NULL;
|
alpar@9
|
213 tsp->dimension = 0;
|
alpar@9
|
214 tsp->edge_weight_type = TSP_UNDEF;
|
alpar@9
|
215 tsp->edge_weight_format = TSP_UNDEF;
|
alpar@9
|
216 tsp->display_data_type = TSP_UNDEF;
|
alpar@9
|
217 tsp->node_x_coord = NULL;
|
alpar@9
|
218 tsp->node_y_coord = NULL;
|
alpar@9
|
219 tsp->dply_x_coord = NULL;
|
alpar@9
|
220 tsp->dply_y_coord = NULL;
|
alpar@9
|
221 tsp->tour = NULL;
|
alpar@9
|
222 tsp->edge_weight = NULL;
|
alpar@9
|
223 dsa->seqn = 1;
|
alpar@9
|
224 if (get_char(dsa)) goto fail;
|
alpar@9
|
225 loop: if (scan_keyword(dsa)) goto fail;
|
alpar@9
|
226 if (strcmp(dsa->token, "NAME") == 0)
|
alpar@9
|
227 { if (tsp->name != NULL)
|
alpar@9
|
228 { xprintf("%s:%d: NAME entry multiply defined\n", dsa->fname,
|
alpar@9
|
229 dsa->seqn);
|
alpar@9
|
230 goto fail;
|
alpar@9
|
231 }
|
alpar@9
|
232 if (check_colon(dsa)) goto fail;
|
alpar@9
|
233 if (scan_token(dsa, 0)) goto fail;
|
alpar@9
|
234 if (strlen(dsa->token) == 0)
|
alpar@9
|
235 { xprintf("%s:%d: NAME entry incomplete\n", dsa->fname,
|
alpar@9
|
236 dsa->seqn);
|
alpar@9
|
237 goto fail;
|
alpar@9
|
238 }
|
alpar@9
|
239 tsp->name = xmalloc(strlen(dsa->token) + 1);
|
alpar@9
|
240 strcpy(tsp->name, dsa->token);
|
alpar@9
|
241 xprintf("tsp_read_data: NAME: %s\n", tsp->name);
|
alpar@9
|
242 if (check_newline(dsa)) goto fail;
|
alpar@9
|
243 }
|
alpar@9
|
244 else if (strcmp(dsa->token, "TYPE") == 0)
|
alpar@9
|
245 { if (tsp->type != TSP_UNDEF)
|
alpar@9
|
246 { xprintf("%s:%d: TYPE entry multiply defined\n", dsa->fname,
|
alpar@9
|
247 dsa->seqn);
|
alpar@9
|
248 goto fail;
|
alpar@9
|
249 }
|
alpar@9
|
250 if (check_colon(dsa)) goto fail;
|
alpar@9
|
251 if (scan_keyword(dsa)) goto fail;
|
alpar@9
|
252 if (strcmp(dsa->token, "TSP") == 0)
|
alpar@9
|
253 tsp->type = TSP_TSP;
|
alpar@9
|
254 else if (strcmp(dsa->token, "ATSP") == 0)
|
alpar@9
|
255 tsp->type = TSP_ATSP;
|
alpar@9
|
256 else if (strcmp(dsa->token, "TOUR") == 0)
|
alpar@9
|
257 tsp->type = TSP_TOUR;
|
alpar@9
|
258 else
|
alpar@9
|
259 { xprintf("%s:%d: data type `%s' not recognized\n",
|
alpar@9
|
260 dsa->fname, dsa->seqn, dsa->token);
|
alpar@9
|
261 goto fail;
|
alpar@9
|
262 }
|
alpar@9
|
263 xprintf("tsp_read_data: TYPE: %s\n", dsa->token);
|
alpar@9
|
264 if (check_newline(dsa)) goto fail;
|
alpar@9
|
265 }
|
alpar@9
|
266 else if (strcmp(dsa->token, "COMMENT") == 0)
|
alpar@9
|
267 { if (tsp->comment != NULL)
|
alpar@9
|
268 { xprintf("%s:%d: COMMENT entry multiply defined\n",
|
alpar@9
|
269 dsa->fname, dsa->seqn);
|
alpar@9
|
270 goto fail;
|
alpar@9
|
271 }
|
alpar@9
|
272 if (check_colon(dsa)) goto fail;
|
alpar@9
|
273 if (scan_comment(dsa)) goto fail;
|
alpar@9
|
274 tsp->comment = xmalloc(strlen(dsa->token) + 1);
|
alpar@9
|
275 strcpy(tsp->comment, dsa->token);
|
alpar@9
|
276 xprintf("tsp_read_data: COMMENT: %s\n", tsp->comment);
|
alpar@9
|
277 if (check_newline(dsa)) goto fail;
|
alpar@9
|
278 }
|
alpar@9
|
279 else if (strcmp(dsa->token, "DIMENSION") == 0)
|
alpar@9
|
280 { if (tsp->dimension != 0)
|
alpar@9
|
281 { xprintf("%s:%d: DIMENSION entry multiply defined\n",
|
alpar@9
|
282 dsa->fname, dsa->seqn);
|
alpar@9
|
283 goto fail;
|
alpar@9
|
284 }
|
alpar@9
|
285 if (check_colon(dsa)) goto fail;
|
alpar@9
|
286 if (scan_integer(dsa, 0, &tsp->dimension)) goto fail;
|
alpar@9
|
287 if (tsp->dimension < 1)
|
alpar@9
|
288 { xprintf("%s:%d: invalid dimension\n", dsa->fname,
|
alpar@9
|
289 dsa->seqn);
|
alpar@9
|
290 goto fail;
|
alpar@9
|
291 }
|
alpar@9
|
292 xprintf("tsp_read_data: DIMENSION: %d\n", tsp->dimension);
|
alpar@9
|
293 if (check_newline(dsa)) goto fail;
|
alpar@9
|
294 }
|
alpar@9
|
295 else if (strcmp(dsa->token, "EDGE_WEIGHT_TYPE") == 0)
|
alpar@9
|
296 { if (tsp->edge_weight_type != TSP_UNDEF)
|
alpar@9
|
297 { xprintf("%s:%d: EDGE_WEIGHT_TYPE entry multiply defined\n",
|
alpar@9
|
298 dsa->fname, dsa->seqn);
|
alpar@9
|
299 goto fail;
|
alpar@9
|
300 }
|
alpar@9
|
301 if (check_colon(dsa)) goto fail;
|
alpar@9
|
302 if (scan_keyword(dsa)) goto fail;
|
alpar@9
|
303 if (strcmp(dsa->token, "GEO") == 0)
|
alpar@9
|
304 tsp->edge_weight_type = TSP_GEO;
|
alpar@9
|
305 else if (strcmp(dsa->token, "EUC_2D") == 0)
|
alpar@9
|
306 tsp->edge_weight_type = TSP_EUC_2D;
|
alpar@9
|
307 else if (strcmp(dsa->token, "ATT") == 0)
|
alpar@9
|
308 tsp->edge_weight_type = TSP_ATT;
|
alpar@9
|
309 else if (strcmp(dsa->token, "EXPLICIT") == 0)
|
alpar@9
|
310 tsp->edge_weight_type = TSP_EXPLICIT;
|
alpar@9
|
311 else if (strcmp(dsa->token, "CEIL_2D") == 0)
|
alpar@9
|
312 tsp->edge_weight_type = TSP_CEIL_2D;
|
alpar@9
|
313 else
|
alpar@9
|
314 { xprintf("%s:%d: edge weight type `%s' not recognized\n",
|
alpar@9
|
315 dsa->fname, dsa->seqn, dsa->token);
|
alpar@9
|
316 goto fail;
|
alpar@9
|
317 }
|
alpar@9
|
318 xprintf("tsp_read_data: EDGE_WEIGHT_TYPE: %s\n", dsa->token);
|
alpar@9
|
319 if (check_newline(dsa)) goto fail;
|
alpar@9
|
320 }
|
alpar@9
|
321 else if (strcmp(dsa->token, "EDGE_WEIGHT_FORMAT") == 0)
|
alpar@9
|
322 { if (tsp->edge_weight_format != TSP_UNDEF)
|
alpar@9
|
323 { xprintf(
|
alpar@9
|
324 "%s:%d: EDGE_WEIGHT_FORMAT entry multiply defined\n",
|
alpar@9
|
325 dsa->fname, dsa->seqn);
|
alpar@9
|
326 goto fail;
|
alpar@9
|
327 }
|
alpar@9
|
328 if (check_colon(dsa)) goto fail;
|
alpar@9
|
329 if (scan_keyword(dsa)) goto fail;
|
alpar@9
|
330 if (strcmp(dsa->token, "UPPER_ROW") == 0)
|
alpar@9
|
331 tsp->edge_weight_format = TSP_UPPER_ROW;
|
alpar@9
|
332 else if (strcmp(dsa->token, "FULL_MATRIX") == 0)
|
alpar@9
|
333 tsp->edge_weight_format = TSP_FULL_MATRIX;
|
alpar@9
|
334 else if (strcmp(dsa->token, "FUNCTION") == 0)
|
alpar@9
|
335 tsp->edge_weight_format = TSP_FUNCTION;
|
alpar@9
|
336 else if (strcmp(dsa->token, "LOWER_DIAG_ROW") == 0)
|
alpar@9
|
337 tsp->edge_weight_format = TSP_LOWER_DIAG_ROW;
|
alpar@9
|
338 else
|
alpar@9
|
339 { xprintf("%s:%d: edge weight format `%s' not recognized\n",
|
alpar@9
|
340 dsa->fname, dsa->seqn, dsa->token);
|
alpar@9
|
341 goto fail;
|
alpar@9
|
342 }
|
alpar@9
|
343 xprintf("tsp_read_data: EDGE_WEIGHT_FORMAT: %s\n", dsa->token);
|
alpar@9
|
344 if (check_newline(dsa)) goto fail;
|
alpar@9
|
345 }
|
alpar@9
|
346 else if (strcmp(dsa->token, "DISPLAY_DATA_TYPE") == 0)
|
alpar@9
|
347 { if (tsp->display_data_type != TSP_UNDEF)
|
alpar@9
|
348 { xprintf("%s:%d: DISPLAY_DATA_TYPE entry multiply defined\n",
|
alpar@9
|
349 dsa->fname, dsa->seqn);
|
alpar@9
|
350 goto fail;
|
alpar@9
|
351 }
|
alpar@9
|
352 if (check_colon(dsa)) goto fail;
|
alpar@9
|
353 if (scan_keyword(dsa)) goto fail;
|
alpar@9
|
354 if (strcmp(dsa->token, "COORD_DISPLAY") == 0)
|
alpar@9
|
355 tsp->display_data_type = TSP_COORD_DISPLAY;
|
alpar@9
|
356 else if (strcmp(dsa->token, "TWOD_DISPLAY") == 0)
|
alpar@9
|
357 tsp->display_data_type = TSP_TWOD_DISPLAY;
|
alpar@9
|
358 else
|
alpar@9
|
359 { xprintf("%s:%d: display data type `%s' not recognized\n",
|
alpar@9
|
360 dsa->fname, dsa->seqn, dsa->token);
|
alpar@9
|
361 goto fail;
|
alpar@9
|
362 }
|
alpar@9
|
363 xprintf("tsp_read_data: DISPLAY_DATA_TYPE: %s\n", dsa->token);
|
alpar@9
|
364 if (check_newline(dsa)) goto fail;
|
alpar@9
|
365 }
|
alpar@9
|
366 else if (strcmp(dsa->token, "NODE_COORD_SECTION") == 0)
|
alpar@9
|
367 { int n = tsp->dimension, k, node;
|
alpar@9
|
368 if (n == 0)
|
alpar@9
|
369 { xprintf("%s:%d: DIMENSION entry not specified\n",
|
alpar@9
|
370 dsa->fname, dsa->seqn);
|
alpar@9
|
371 goto fail;
|
alpar@9
|
372 }
|
alpar@9
|
373 if (tsp->node_x_coord != NULL)
|
alpar@9
|
374 { xprintf("%s:%d: NODE_COORD_SECTION multiply specified\n",
|
alpar@9
|
375 dsa->fname, dsa->seqn);
|
alpar@9
|
376 goto fail;
|
alpar@9
|
377 }
|
alpar@9
|
378 if (check_newline(dsa)) goto fail;
|
alpar@9
|
379 tsp->node_x_coord = xcalloc(1+n, sizeof(double));
|
alpar@9
|
380 tsp->node_y_coord = xcalloc(1+n, sizeof(double));
|
alpar@9
|
381 for (node = 1; node <= n; node++)
|
alpar@9
|
382 tsp->node_x_coord[node] = tsp->node_y_coord[node] = DBL_MAX;
|
alpar@9
|
383 for (k = 1; k <= n; k++)
|
alpar@9
|
384 { if (scan_integer(dsa, 0, &node)) goto fail;
|
alpar@9
|
385 if (!(1 <= node && node <= n))
|
alpar@9
|
386 { xprintf("%s:%d: invalid node number %d\n", dsa->fname,
|
alpar@9
|
387 dsa->seqn, node);
|
alpar@9
|
388 goto fail;
|
alpar@9
|
389 }
|
alpar@9
|
390 if (tsp->node_x_coord[node] != DBL_MAX)
|
alpar@9
|
391 { xprintf("%s:%d: node number %d multiply specified\n",
|
alpar@9
|
392 dsa->fname, dsa->seqn, node);
|
alpar@9
|
393 goto fail;
|
alpar@9
|
394 }
|
alpar@9
|
395 if (scan_number(dsa, 0, &tsp->node_x_coord[node]))
|
alpar@9
|
396 goto fail;
|
alpar@9
|
397 if (scan_number(dsa, 0, &tsp->node_y_coord[node]))
|
alpar@9
|
398 goto fail;
|
alpar@9
|
399 if (check_newline(dsa)) goto fail;
|
alpar@9
|
400 }
|
alpar@9
|
401 }
|
alpar@9
|
402 else if (strcmp(dsa->token, "DISPLAY_DATA_SECTION") == 0)
|
alpar@9
|
403 { int n = tsp->dimension, k, node;
|
alpar@9
|
404 if (n == 0)
|
alpar@9
|
405 { xprintf("%s:%d: DIMENSION entry not specified\n",
|
alpar@9
|
406 dsa->fname, dsa->seqn);
|
alpar@9
|
407 goto fail;
|
alpar@9
|
408 }
|
alpar@9
|
409 if (tsp->dply_x_coord != NULL)
|
alpar@9
|
410 { xprintf("%s:%d: DISPLAY_DATA_SECTION multiply specified\n",
|
alpar@9
|
411 dsa->fname, dsa->seqn);
|
alpar@9
|
412 goto fail;
|
alpar@9
|
413 }
|
alpar@9
|
414 if (check_newline(dsa)) goto fail;
|
alpar@9
|
415 tsp->dply_x_coord = xcalloc(1+n, sizeof(double));
|
alpar@9
|
416 tsp->dply_y_coord = xcalloc(1+n, sizeof(double));
|
alpar@9
|
417 for (node = 1; node <= n; node++)
|
alpar@9
|
418 tsp->dply_x_coord[node] = tsp->dply_y_coord[node] = DBL_MAX;
|
alpar@9
|
419 for (k = 1; k <= n; k++)
|
alpar@9
|
420 { if (scan_integer(dsa, 0, &node)) goto fail;
|
alpar@9
|
421 if (!(1 <= node && node <= n))
|
alpar@9
|
422 { xprintf("%s:%d: invalid node number %d\n", dsa->fname,
|
alpar@9
|
423 dsa->seqn, node);
|
alpar@9
|
424 goto fail;
|
alpar@9
|
425 }
|
alpar@9
|
426 if (tsp->dply_x_coord[node] != DBL_MAX)
|
alpar@9
|
427 { xprintf("%s:%d: node number %d multiply specified\n",
|
alpar@9
|
428 dsa->fname, dsa->seqn, node);
|
alpar@9
|
429 goto fail;
|
alpar@9
|
430 }
|
alpar@9
|
431 if (scan_number(dsa, 0, &tsp->dply_x_coord[node]))
|
alpar@9
|
432 goto fail;
|
alpar@9
|
433 if (scan_number(dsa, 0, &tsp->dply_y_coord[node]))
|
alpar@9
|
434 goto fail;
|
alpar@9
|
435 if (check_newline(dsa)) goto fail;
|
alpar@9
|
436 }
|
alpar@9
|
437 }
|
alpar@9
|
438 else if (strcmp(dsa->token, "TOUR_SECTION") == 0)
|
alpar@9
|
439 { int n = tsp->dimension, k, node;
|
alpar@9
|
440 if (n == 0)
|
alpar@9
|
441 { xprintf("%s:%d: DIMENSION entry not specified\n",
|
alpar@9
|
442 dsa->fname, dsa->seqn);
|
alpar@9
|
443 goto fail;
|
alpar@9
|
444 }
|
alpar@9
|
445 if (tsp->tour != NULL)
|
alpar@9
|
446 { xprintf("%s:%d: TOUR_SECTION multiply specified\n",
|
alpar@9
|
447 dsa->fname, dsa->seqn);
|
alpar@9
|
448 goto fail;
|
alpar@9
|
449 }
|
alpar@9
|
450 if (check_newline(dsa)) goto fail;
|
alpar@9
|
451 tsp->tour = xcalloc(1+n, sizeof(int));
|
alpar@9
|
452 for (k = 1; k <= n; k++)
|
alpar@9
|
453 { if (scan_integer(dsa, 1, &node)) goto fail;
|
alpar@9
|
454 if (!(1 <= node && node <= n))
|
alpar@9
|
455 { xprintf("%s:%d: invalid node number %d\n", dsa->fname,
|
alpar@9
|
456 dsa->seqn, node);
|
alpar@9
|
457 goto fail;
|
alpar@9
|
458 }
|
alpar@9
|
459 tsp->tour[k] = node;
|
alpar@9
|
460 }
|
alpar@9
|
461 if (scan_integer(dsa, 1, &node)) goto fail;
|
alpar@9
|
462 if (node != -1)
|
alpar@9
|
463 { xprintf("%s:%d: extra node(s) detected\n", dsa->fname,
|
alpar@9
|
464 dsa->seqn);
|
alpar@9
|
465 goto fail;
|
alpar@9
|
466 }
|
alpar@9
|
467 if (check_newline(dsa)) goto fail;
|
alpar@9
|
468 }
|
alpar@9
|
469 else if (strcmp(dsa->token, "EDGE_WEIGHT_SECTION") == 0)
|
alpar@9
|
470 { int n = tsp->dimension, i, j, temp;
|
alpar@9
|
471 if (n == 0)
|
alpar@9
|
472 { xprintf("%s:%d: DIMENSION entry not specified\n",
|
alpar@9
|
473 dsa->fname, dsa->seqn);
|
alpar@9
|
474 goto fail;
|
alpar@9
|
475 }
|
alpar@9
|
476 if (tsp->edge_weight_format == TSP_UNDEF)
|
alpar@9
|
477 { xprintf("%s:%d: EDGE_WEIGHT_FORMAT entry not specified\n",
|
alpar@9
|
478 dsa->fname, dsa->seqn);
|
alpar@9
|
479 goto fail;
|
alpar@9
|
480 }
|
alpar@9
|
481 if (tsp->edge_weight != NULL)
|
alpar@9
|
482 { xprintf("%s:%d: EDGE_WEIGHT_SECTION multiply specified\n",
|
alpar@9
|
483 dsa->fname, dsa->seqn);
|
alpar@9
|
484 goto fail;
|
alpar@9
|
485 }
|
alpar@9
|
486 if (check_newline(dsa)) goto fail;
|
alpar@9
|
487 tsp->edge_weight = xcalloc(1+n*n, sizeof(int));
|
alpar@9
|
488 switch (tsp->edge_weight_format)
|
alpar@9
|
489 { case TSP_FULL_MATRIX:
|
alpar@9
|
490 for (i = 1; i <= n; i++)
|
alpar@9
|
491 { for (j = 1; j <= n; j++)
|
alpar@9
|
492 { if (scan_integer(dsa, 1, &temp)) goto fail;
|
alpar@9
|
493 tsp->edge_weight[(i - 1) * n + j] = temp;
|
alpar@9
|
494 }
|
alpar@9
|
495 }
|
alpar@9
|
496 break;
|
alpar@9
|
497 case TSP_UPPER_ROW:
|
alpar@9
|
498 for (i = 1; i <= n; i++)
|
alpar@9
|
499 { tsp->edge_weight[(i - 1) * n + i] = 0;
|
alpar@9
|
500 for (j = i + 1; j <= n; j++)
|
alpar@9
|
501 { if (scan_integer(dsa, 1, &temp)) goto fail;
|
alpar@9
|
502 tsp->edge_weight[(i - 1) * n + j] = temp;
|
alpar@9
|
503 tsp->edge_weight[(j - 1) * n + i] = temp;
|
alpar@9
|
504 }
|
alpar@9
|
505 }
|
alpar@9
|
506 break;
|
alpar@9
|
507 case TSP_LOWER_DIAG_ROW:
|
alpar@9
|
508 for (i = 1; i <= n; i++)
|
alpar@9
|
509 { for (j = 1; j <= i; j++)
|
alpar@9
|
510 { if (scan_integer(dsa, 1, &temp)) goto fail;
|
alpar@9
|
511 tsp->edge_weight[(i - 1) * n + j] = temp;
|
alpar@9
|
512 tsp->edge_weight[(j - 1) * n + i] = temp;
|
alpar@9
|
513 }
|
alpar@9
|
514 }
|
alpar@9
|
515 break;
|
alpar@9
|
516 default:
|
alpar@9
|
517 goto fail;
|
alpar@9
|
518 }
|
alpar@9
|
519 if (check_newline(dsa)) goto fail;
|
alpar@9
|
520 }
|
alpar@9
|
521 else if (strcmp(dsa->token, "EOF") == 0)
|
alpar@9
|
522 { if (check_newline(dsa)) goto fail;
|
alpar@9
|
523 goto done;
|
alpar@9
|
524 }
|
alpar@9
|
525 else
|
alpar@9
|
526 { xprintf("%s:%d: keyword `%s' not recognized\n", dsa->fname,
|
alpar@9
|
527 dsa->seqn, dsa->token);
|
alpar@9
|
528 goto fail;
|
alpar@9
|
529 }
|
alpar@9
|
530 goto loop;
|
alpar@9
|
531 done: xprintf("tsp_read_data: %d lines were read\n", dsa->seqn-1);
|
alpar@9
|
532 fclose(dsa->fp);
|
alpar@9
|
533 return tsp;
|
alpar@9
|
534 fail: if (tsp != NULL)
|
alpar@9
|
535 { if (tsp->name != NULL) xfree(tsp->name);
|
alpar@9
|
536 if (tsp->comment != NULL) xfree(tsp->comment);
|
alpar@9
|
537 if (tsp->node_x_coord != NULL) xfree(tsp->node_x_coord);
|
alpar@9
|
538 if (tsp->node_y_coord != NULL) xfree(tsp->node_y_coord);
|
alpar@9
|
539 if (tsp->dply_x_coord != NULL) xfree(tsp->dply_x_coord);
|
alpar@9
|
540 if (tsp->dply_y_coord != NULL) xfree(tsp->dply_y_coord);
|
alpar@9
|
541 if (tsp->tour != NULL) xfree(tsp->tour);
|
alpar@9
|
542 if (tsp->edge_weight != NULL) xfree(tsp->edge_weight);
|
alpar@9
|
543 xfree(tsp);
|
alpar@9
|
544 }
|
alpar@9
|
545 if (dsa->fp != NULL) fclose(dsa->fp);
|
alpar@9
|
546 return NULL;
|
alpar@9
|
547 }
|
alpar@9
|
548
|
alpar@9
|
549 /*----------------------------------------------------------------------
|
alpar@9
|
550 -- tsp_free_data - free TSP instance data.
|
alpar@9
|
551 --
|
alpar@9
|
552 -- *Synopsis*
|
alpar@9
|
553 --
|
alpar@9
|
554 -- #include "glptsp.h"
|
alpar@9
|
555 -- void tsp_free_data(TSP *tsp);
|
alpar@9
|
556 --
|
alpar@9
|
557 -- *Description*
|
alpar@9
|
558 --
|
alpar@9
|
559 -- The routine tsp_free_data frees all the memory allocated to the TSP
|
alpar@9
|
560 -- instance data block, which the parameter tsp points to. */
|
alpar@9
|
561
|
alpar@9
|
562 void tsp_free_data(TSP *tsp)
|
alpar@9
|
563 { if (tsp->name != NULL) xfree(tsp->name);
|
alpar@9
|
564 if (tsp->comment != NULL) xfree(tsp->comment);
|
alpar@9
|
565 if (tsp->node_x_coord != NULL) xfree(tsp->node_x_coord);
|
alpar@9
|
566 if (tsp->node_y_coord != NULL) xfree(tsp->node_y_coord);
|
alpar@9
|
567 if (tsp->dply_x_coord != NULL) xfree(tsp->dply_x_coord);
|
alpar@9
|
568 if (tsp->dply_y_coord != NULL) xfree(tsp->dply_y_coord);
|
alpar@9
|
569 if (tsp->tour != NULL) xfree(tsp->tour);
|
alpar@9
|
570 if (tsp->edge_weight != NULL) xfree(tsp->edge_weight);
|
alpar@9
|
571 xfree(tsp);
|
alpar@9
|
572 return;
|
alpar@9
|
573 }
|
alpar@9
|
574
|
alpar@9
|
575 /*----------------------------------------------------------------------
|
alpar@9
|
576 -- tsp_distance - compute distance between two nodes.
|
alpar@9
|
577 --
|
alpar@9
|
578 -- *Synopsis*
|
alpar@9
|
579 --
|
alpar@9
|
580 -- #include "glptsp.h"
|
alpar@9
|
581 -- int tsp_distance(TSP *tsp, int i, int j);
|
alpar@9
|
582 --
|
alpar@9
|
583 -- *Description*
|
alpar@9
|
584 --
|
alpar@9
|
585 -- The routine tsp_distance computes the distance between i-th and j-th
|
alpar@9
|
586 -- nodes for the TSP instance, which tsp points to.
|
alpar@9
|
587 --
|
alpar@9
|
588 -- *Returns*
|
alpar@9
|
589 --
|
alpar@9
|
590 -- The routine tsp_distance returns the computed distance. */
|
alpar@9
|
591
|
alpar@9
|
592 #define nint(x) ((int)((x) + 0.5))
|
alpar@9
|
593
|
alpar@9
|
594 static double rad(double x)
|
alpar@9
|
595 { /* convert input coordinate to longitude/latitude, in radians */
|
alpar@9
|
596 double pi = 3.141592, deg, min;
|
alpar@9
|
597 deg = (int)x;
|
alpar@9
|
598 min = x - deg;
|
alpar@9
|
599 return pi * (deg + 5.0 * min / 3.0) / 180.0;
|
alpar@9
|
600 }
|
alpar@9
|
601
|
alpar@9
|
602 int tsp_distance(TSP *tsp, int i, int j)
|
alpar@9
|
603 { int n = tsp->dimension, dij;
|
alpar@9
|
604 if (!(tsp->type == TSP_TSP || tsp->type == TSP_ATSP))
|
alpar@9
|
605 xfault("tsp_distance: invalid TSP instance\n");
|
alpar@9
|
606 if (!(1 <= i && i <= n && 1 <= j && j <= n))
|
alpar@9
|
607 xfault("tsp_distance: node number out of range\n");
|
alpar@9
|
608 switch (tsp->edge_weight_type)
|
alpar@9
|
609 { case TSP_UNDEF:
|
alpar@9
|
610 xfault("tsp_distance: edge weight type not specified\n");
|
alpar@9
|
611 case TSP_EXPLICIT:
|
alpar@9
|
612 if (tsp->edge_weight == NULL)
|
alpar@9
|
613 xfault("tsp_distance: edge weights not specified\n");
|
alpar@9
|
614 dij = tsp->edge_weight[(i - 1) * n + j];
|
alpar@9
|
615 break;
|
alpar@9
|
616 case TSP_EUC_2D:
|
alpar@9
|
617 if (tsp->node_x_coord == NULL || tsp->node_y_coord == NULL)
|
alpar@9
|
618 xfault("tsp_distance: node coordinates not specified\n");
|
alpar@9
|
619 { double xd, yd;
|
alpar@9
|
620 xd = tsp->node_x_coord[i] - tsp->node_x_coord[j];
|
alpar@9
|
621 yd = tsp->node_y_coord[i] - tsp->node_y_coord[j];
|
alpar@9
|
622 dij = nint(sqrt(xd * xd + yd * yd));
|
alpar@9
|
623 }
|
alpar@9
|
624 break;
|
alpar@9
|
625 case TSP_CEIL_2D:
|
alpar@9
|
626 if (tsp->node_x_coord == NULL || tsp->node_y_coord == NULL)
|
alpar@9
|
627 xfault("tsp_distance: node coordinates not specified\n");
|
alpar@9
|
628 { double xd, yd;
|
alpar@9
|
629 xd = tsp->node_x_coord[i] - tsp->node_x_coord[j];
|
alpar@9
|
630 yd = tsp->node_y_coord[i] - tsp->node_y_coord[j];
|
alpar@9
|
631 dij = (int)ceil(sqrt(xd * xd + yd * yd));
|
alpar@9
|
632 }
|
alpar@9
|
633 break;
|
alpar@9
|
634 case TSP_GEO:
|
alpar@9
|
635 if (tsp->node_x_coord == NULL || tsp->node_y_coord == NULL)
|
alpar@9
|
636 xfault("tsp_distance: node coordinates not specified\n");
|
alpar@9
|
637 { double rrr = 6378.388;
|
alpar@9
|
638 double latitude_i = rad(tsp->node_x_coord[i]);
|
alpar@9
|
639 double latitude_j = rad(tsp->node_x_coord[j]);
|
alpar@9
|
640 double longitude_i = rad(tsp->node_y_coord[i]);
|
alpar@9
|
641 double longitude_j = rad(tsp->node_y_coord[j]);
|
alpar@9
|
642 double q1 = cos(longitude_i - longitude_j);
|
alpar@9
|
643 double q2 = cos(latitude_i - latitude_j);
|
alpar@9
|
644 double q3 = cos(latitude_i + latitude_j);
|
alpar@9
|
645 dij = (int)(rrr * acos(0.5 * ((1.0 + q1) * q2 -
|
alpar@9
|
646 (1.0 - q1) *q3)) + 1.0);
|
alpar@9
|
647 }
|
alpar@9
|
648 break;
|
alpar@9
|
649 case TSP_ATT:
|
alpar@9
|
650 if (tsp->node_x_coord == NULL || tsp->node_y_coord == NULL)
|
alpar@9
|
651 xfault("tsp_distance: node coordinates not specified\n");
|
alpar@9
|
652 { int tij;
|
alpar@9
|
653 double xd, yd, rij;
|
alpar@9
|
654 xd = tsp->node_x_coord[i] - tsp->node_x_coord[j];
|
alpar@9
|
655 yd = tsp->node_y_coord[i] - tsp->node_y_coord[j];
|
alpar@9
|
656 rij = sqrt((xd * xd + yd * yd) / 10.0);
|
alpar@9
|
657 tij = nint(rij);
|
alpar@9
|
658 if (tij < rij) dij = tij + 1; else dij = tij;
|
alpar@9
|
659 }
|
alpar@9
|
660 break;
|
alpar@9
|
661 default:
|
alpar@9
|
662 xassert(tsp->edge_weight_type != tsp->edge_weight_type);
|
alpar@9
|
663 }
|
alpar@9
|
664 return dij;
|
alpar@9
|
665 }
|
alpar@9
|
666
|
alpar@9
|
667 /* eof */
|