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