1 | /* glpmps.c (MPS format routines) */ |
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2 | |
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3 | /*********************************************************************** |
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4 | * This code is part of GLPK (GNU Linear Programming Kit). |
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5 | * |
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6 | * Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, |
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7 | * 2009, 2010 Andrew Makhorin, Department for Applied Informatics, |
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8 | * Moscow Aviation Institute, Moscow, Russia. All rights reserved. |
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9 | * E-mail: <mao@gnu.org>. |
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10 | * |
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11 | * GLPK is free software: you can redistribute it and/or modify it |
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12 | * under the terms of the GNU General Public License as published by |
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13 | * the Free Software Foundation, either version 3 of the License, or |
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14 | * (at your option) any later version. |
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15 | * |
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16 | * GLPK is distributed in the hope that it will be useful, but WITHOUT |
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17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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18 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
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19 | * License for more details. |
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20 | * |
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21 | * You should have received a copy of the GNU General Public License |
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22 | * along with GLPK. If not, see <http://www.gnu.org/licenses/>. |
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23 | ***********************************************************************/ |
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24 | |
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25 | #include "glpapi.h" |
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26 | |
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27 | /*********************************************************************** |
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28 | * NAME |
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29 | * |
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30 | * glp_init_mpscp - initialize MPS format control parameters |
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31 | * |
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32 | * SYNOPSIS |
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33 | * |
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34 | * void glp_init_mpscp(glp_mpscp *parm); |
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35 | * |
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36 | * DESCRIPTION |
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37 | * |
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38 | * The routine glp_init_mpscp initializes control parameters, which are |
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39 | * used by the MPS input/output routines glp_read_mps and glp_write_mps, |
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40 | * with default values. |
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41 | * |
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42 | * Default values of the control parameters are stored in the glp_mpscp |
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43 | * structure, which the parameter parm points to. */ |
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44 | |
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45 | void glp_init_mpscp(glp_mpscp *parm) |
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46 | { parm->blank = '\0'; |
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47 | parm->obj_name = NULL; |
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48 | parm->tol_mps = 1e-12; |
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49 | return; |
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50 | } |
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51 | |
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52 | static void check_parm(const char *func, const glp_mpscp *parm) |
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53 | { /* check control parameters */ |
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54 | if (!(0x00 <= parm->blank && parm->blank <= 0xFF) || |
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55 | !(parm->blank == '\0' || isprint(parm->blank))) |
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56 | xerror("%s: blank = 0x%02X; invalid parameter\n", |
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57 | func, parm->blank); |
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58 | if (!(parm->obj_name == NULL || strlen(parm->obj_name) <= 255)) |
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59 | xerror("%s: obj_name = \"%.12s...\"; parameter too long\n", |
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60 | func, parm->obj_name); |
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61 | if (!(0.0 <= parm->tol_mps && parm->tol_mps < 1.0)) |
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62 | xerror("%s: tol_mps = %g; invalid parameter\n", |
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63 | func, parm->tol_mps); |
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64 | return; |
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65 | } |
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66 | |
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67 | /*********************************************************************** |
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68 | * NAME |
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69 | * |
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70 | * glp_read_mps - read problem data in MPS format |
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71 | * |
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72 | * SYNOPSIS |
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73 | * |
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74 | * int glp_read_mps(glp_prob *P, int fmt, const glp_mpscp *parm, |
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75 | * const char *fname); |
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76 | * |
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77 | * DESCRIPTION |
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78 | * |
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79 | * The routine glp_read_mps reads problem data in MPS format from a |
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80 | * text file. |
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81 | * |
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82 | * The parameter fmt specifies the version of MPS format: |
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83 | * |
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84 | * GLP_MPS_DECK - fixed (ancient) MPS format; |
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85 | * GLP_MPS_FILE - free (modern) MPS format. |
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86 | * |
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87 | * The parameter parm is a pointer to the structure glp_mpscp, which |
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88 | * specifies control parameters used by the routine. If parm is NULL, |
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89 | * the routine uses default settings. |
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90 | * |
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91 | * The character string fname specifies a name of the text file to be |
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92 | * read. |
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93 | * |
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94 | * Note that before reading data the current content of the problem |
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95 | * object is completely erased with the routine glp_erase_prob. |
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96 | * |
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97 | * RETURNS |
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98 | * |
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99 | * If the operation was successful, the routine glp_read_mps returns |
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100 | * zero. Otherwise, it prints an error message and returns non-zero. */ |
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101 | |
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102 | struct csa |
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103 | { /* common storage area */ |
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104 | glp_prob *P; |
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105 | /* pointer to problem object */ |
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106 | int deck; |
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107 | /* MPS format (0 - free, 1 - fixed) */ |
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108 | const glp_mpscp *parm; |
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109 | /* pointer to control parameters */ |
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110 | const char *fname; |
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111 | /* name of input MPS file */ |
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112 | XFILE *fp; |
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113 | /* stream assigned to input MPS file */ |
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114 | jmp_buf jump; |
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115 | /* label for go to in case of error */ |
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116 | int recno; |
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117 | /* current record (card) number */ |
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118 | int recpos; |
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119 | /* current record (card) position */ |
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120 | int c; |
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121 | /* current character */ |
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122 | int fldno; |
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123 | /* current field number */ |
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124 | char field[255+1]; |
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125 | /* current field content */ |
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126 | int w80; |
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127 | /* warning 'record must not be longer than 80 chars' issued */ |
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128 | int wef; |
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129 | /* warning 'extra fields detected beyond field 6' issued */ |
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130 | int obj_row; |
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131 | /* objective row number */ |
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132 | void *work1, *work2, *work3; |
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133 | /* working arrays */ |
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134 | }; |
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135 | |
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136 | static void error(struct csa *csa, const char *fmt, ...) |
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137 | { /* print error message and terminate processing */ |
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138 | va_list arg; |
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139 | xprintf("%s:%d: ", csa->fname, csa->recno); |
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140 | va_start(arg, fmt); |
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141 | xvprintf(fmt, arg); |
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142 | va_end(arg); |
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143 | longjmp(csa->jump, 1); |
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144 | /* no return */ |
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145 | } |
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146 | |
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147 | static void warning(struct csa *csa, const char *fmt, ...) |
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148 | { /* print warning message and continue processing */ |
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149 | va_list arg; |
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150 | xprintf("%s:%d: warning: ", csa->fname, csa->recno); |
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151 | va_start(arg, fmt); |
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152 | xvprintf(fmt, arg); |
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153 | va_end(arg); |
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154 | return; |
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155 | } |
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156 | |
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157 | static void read_char(struct csa *csa) |
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158 | { /* read next character */ |
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159 | int c; |
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160 | if (csa->c == '\n') |
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161 | csa->recno++, csa->recpos = 0; |
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162 | csa->recpos++; |
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163 | read: c = xfgetc(csa->fp); |
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164 | if (c < 0) |
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165 | { if (xferror(csa->fp)) |
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166 | error(csa, "read error - %s\n", xerrmsg()); |
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167 | else if (csa->c == '\n') |
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168 | error(csa, "unexpected end of file\n"); |
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169 | else |
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170 | { warning(csa, "missing final end of line\n"); |
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171 | c = '\n'; |
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172 | } |
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173 | } |
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174 | else if (c == '\n') |
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175 | ; |
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176 | else if (csa->c == '\r') |
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177 | { c = '\r'; |
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178 | goto badc; |
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179 | } |
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180 | else if (csa->deck && c == '\r') |
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181 | { csa->c = '\r'; |
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182 | goto read; |
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183 | } |
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184 | else if (c == ' ') |
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185 | ; |
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186 | else if (isspace(c)) |
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187 | { if (csa->deck) |
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188 | badc: error(csa, "in fixed MPS format white-space character 0x%02" |
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189 | "X is not allowed\n", c); |
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190 | c = ' '; |
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191 | } |
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192 | else if (iscntrl(c)) |
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193 | error(csa, "invalid control character 0x%02X\n", c); |
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194 | if (csa->deck && csa->recpos == 81 && c != '\n' && csa->w80 < 1) |
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195 | { warning(csa, "in fixed MPS format record must not be longer th" |
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196 | "an 80 characters\n"); |
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197 | csa->w80++; |
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198 | } |
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199 | csa->c = c; |
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200 | return; |
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201 | } |
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202 | |
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203 | static int indicator(struct csa *csa, int name) |
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204 | { /* skip comment records and read possible indicator record */ |
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205 | int ret; |
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206 | /* reset current field number */ |
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207 | csa->fldno = 0; |
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208 | loop: /* read the very first character of the next record */ |
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209 | xassert(csa->c == '\n'); |
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210 | read_char(csa); |
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211 | if (csa->c == ' ' || csa->c == '\n') |
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212 | { /* data record */ |
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213 | ret = 0; |
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214 | } |
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215 | else if (csa->c == '*') |
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216 | { /* comment record */ |
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217 | while (csa->c != '\n') |
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218 | read_char(csa); |
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219 | goto loop; |
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220 | } |
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221 | else |
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222 | { /* indicator record */ |
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223 | int len = 0; |
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224 | while (csa->c != ' ' && csa->c != '\n' && len < 12) |
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225 | { csa->field[len++] = (char)csa->c; |
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226 | read_char(csa); |
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227 | } |
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228 | csa->field[len] = '\0'; |
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229 | if (!(strcmp(csa->field, "NAME") == 0 || |
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230 | strcmp(csa->field, "ROWS") == 0 || |
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231 | strcmp(csa->field, "COLUMNS") == 0 || |
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232 | strcmp(csa->field, "RHS") == 0 || |
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233 | strcmp(csa->field, "RANGES") == 0 || |
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234 | strcmp(csa->field, "BOUNDS") == 0 || |
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235 | strcmp(csa->field, "ENDATA") == 0)) |
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236 | error(csa, "invalid indicator record\n"); |
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237 | if (!name) |
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238 | { while (csa->c != '\n') |
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239 | read_char(csa); |
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240 | } |
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241 | ret = 1; |
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242 | } |
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243 | return ret; |
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244 | } |
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245 | |
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246 | static void read_field(struct csa *csa) |
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247 | { /* read next field of the current data record */ |
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248 | csa->fldno++; |
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249 | if (csa->deck) |
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250 | { /* fixed MPS format */ |
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251 | int beg, end, pos; |
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252 | /* determine predefined field positions */ |
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253 | if (csa->fldno == 1) |
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254 | beg = 2, end = 3; |
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255 | else if (csa->fldno == 2) |
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256 | beg = 5, end = 12; |
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257 | else if (csa->fldno == 3) |
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258 | beg = 15, end = 22; |
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259 | else if (csa->fldno == 4) |
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260 | beg = 25, end = 36; |
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261 | else if (csa->fldno == 5) |
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262 | beg = 40, end = 47; |
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263 | else if (csa->fldno == 6) |
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264 | beg = 50, end = 61; |
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265 | else |
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266 | xassert(csa != csa); |
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267 | /* skip blanks preceding the current field */ |
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268 | if (csa->c != '\n') |
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269 | { pos = csa->recpos; |
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270 | while (csa->recpos < beg) |
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271 | { if (csa->c == ' ') |
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272 | ; |
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273 | else if (csa->c == '\n') |
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274 | break; |
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275 | else |
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276 | error(csa, "in fixed MPS format positions %d-%d must " |
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277 | "be blank\n", pos, beg-1); |
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278 | read_char(csa); |
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279 | } |
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280 | } |
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281 | /* skip possible comment beginning in the field 3 or 5 */ |
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282 | if ((csa->fldno == 3 || csa->fldno == 5) && csa->c == '$') |
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283 | { while (csa->c != '\n') |
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284 | read_char(csa); |
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285 | } |
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286 | /* read the current field */ |
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287 | for (pos = beg; pos <= end; pos++) |
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288 | { if (csa->c == '\n') break; |
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289 | csa->field[pos-beg] = (char)csa->c; |
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290 | read_char(csa); |
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291 | } |
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292 | csa->field[pos-beg] = '\0'; |
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293 | strtrim(csa->field); |
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294 | /* skip blanks following the last field */ |
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295 | if (csa->fldno == 6 && csa->c != '\n') |
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296 | { while (csa->recpos <= 72) |
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297 | { if (csa->c == ' ') |
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298 | ; |
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299 | else if (csa->c == '\n') |
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300 | break; |
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301 | else |
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302 | error(csa, "in fixed MPS format positions 62-72 must " |
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303 | "be blank\n"); |
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304 | read_char(csa); |
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305 | } |
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306 | while (csa->c != '\n') |
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307 | read_char(csa); |
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308 | } |
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309 | } |
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310 | else |
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311 | { /* free MPS format */ |
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312 | int len; |
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313 | /* skip blanks preceding the current field */ |
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314 | while (csa->c == ' ') |
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315 | read_char(csa); |
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316 | /* skip possible comment */ |
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317 | if (csa->c == '$') |
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318 | { while (csa->c != '\n') |
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319 | read_char(csa); |
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320 | } |
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321 | /* read the current field */ |
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322 | len = 0; |
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323 | while (!(csa->c == ' ' || csa->c == '\n')) |
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324 | { if (len == 255) |
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325 | error(csa, "length of field %d exceeds 255 characters\n", |
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326 | csa->fldno++); |
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327 | csa->field[len++] = (char)csa->c; |
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328 | read_char(csa); |
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329 | } |
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330 | csa->field[len] = '\0'; |
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331 | /* skip anything following the last field (any extra fields |
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332 | are considered to be comments) */ |
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333 | if (csa->fldno == 6) |
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334 | { while (csa->c == ' ') |
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335 | read_char(csa); |
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336 | if (csa->c != '$' && csa->c != '\n' && csa->wef < 1) |
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337 | { warning(csa, "some extra field(s) detected beyond field " |
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338 | "6; field(s) ignored\n"); |
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339 | csa->wef++; |
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340 | } |
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341 | while (csa->c != '\n') |
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342 | read_char(csa); |
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343 | } |
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344 | } |
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345 | return; |
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346 | } |
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347 | |
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348 | static void patch_name(struct csa *csa, char *name) |
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349 | { /* process embedded blanks in symbolic name */ |
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350 | int blank = csa->parm->blank; |
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351 | if (blank == '\0') |
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352 | { /* remove emedded blanks */ |
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353 | strspx(name); |
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354 | } |
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355 | else |
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356 | { /* replace embedded blanks by specified character */ |
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357 | for (; *name != '\0'; name++) |
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358 | if (*name == ' ') *name = (char)blank; |
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359 | } |
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360 | return; |
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361 | } |
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362 | |
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363 | static double read_number(struct csa *csa) |
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364 | { /* read next field and convert it to floating-point number */ |
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365 | double x; |
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366 | char *s; |
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367 | /* read next field */ |
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368 | read_field(csa); |
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369 | xassert(csa->fldno == 4 || csa->fldno == 6); |
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370 | if (csa->field[0] == '\0') |
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371 | error(csa, "missing numeric value in field %d\n", csa->fldno); |
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372 | /* skip initial spaces of the field */ |
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373 | for (s = csa->field; *s == ' '; s++); |
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374 | /* perform conversion */ |
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375 | if (str2num(s, &x) != 0) |
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376 | error(csa, "cannot convert `%s' to floating-point number\n", |
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377 | s); |
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378 | return x; |
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379 | } |
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380 | |
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381 | static void skip_field(struct csa *csa) |
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382 | { /* read and skip next field (assumed to be blank) */ |
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383 | read_field(csa); |
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384 | if (csa->field[0] != '\0') |
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385 | error(csa, "field %d must be blank\n", csa->fldno); |
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386 | return; |
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387 | } |
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388 | |
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389 | static void read_name(struct csa *csa) |
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390 | { /* read NAME indicator record */ |
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391 | if (!(indicator(csa, 1) && strcmp(csa->field, "NAME") == 0)) |
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392 | error(csa, "missing NAME indicator record\n"); |
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393 | /* this indicator record looks like a data record; simulate that |
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394 | fields 1 and 2 were read */ |
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395 | csa->fldno = 2; |
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396 | /* field 3: model name */ |
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397 | read_field(csa), patch_name(csa, csa->field); |
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398 | if (csa->field[0] == '\0') |
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399 | warning(csa, "missing model name in field 3\n"); |
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400 | else |
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401 | glp_set_prob_name(csa->P, csa->field); |
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402 | /* skip anything following field 3 */ |
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403 | while (csa->c != '\n') |
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404 | read_char(csa); |
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405 | return; |
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406 | } |
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407 | |
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408 | static void read_rows(struct csa *csa) |
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409 | { /* read ROWS section */ |
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410 | int i, type; |
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411 | loop: if (indicator(csa, 0)) goto done; |
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412 | /* field 1: row type */ |
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413 | read_field(csa), strspx(csa->field); |
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414 | if (strcmp(csa->field, "N") == 0) |
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415 | type = GLP_FR; |
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416 | else if (strcmp(csa->field, "G") == 0) |
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417 | type = GLP_LO; |
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418 | else if (strcmp(csa->field, "L") == 0) |
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419 | type = GLP_UP; |
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420 | else if (strcmp(csa->field, "E") == 0) |
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421 | type = GLP_FX; |
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422 | else if (csa->field[0] == '\0') |
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423 | error(csa, "missing row type in field 1\n"); |
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424 | else |
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425 | error(csa, "invalid row type in field 1\n"); |
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426 | /* field 2: row name */ |
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427 | read_field(csa), patch_name(csa, csa->field); |
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428 | if (csa->field[0] == '\0') |
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429 | error(csa, "missing row name in field 2\n"); |
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430 | if (glp_find_row(csa->P, csa->field) != 0) |
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431 | error(csa, "row `%s' multiply specified\n", csa->field); |
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432 | i = glp_add_rows(csa->P, 1); |
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433 | glp_set_row_name(csa->P, i, csa->field); |
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434 | glp_set_row_bnds(csa->P, i, type, 0.0, 0.0); |
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435 | /* fields 3, 4, 5, and 6 must be blank */ |
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436 | skip_field(csa); |
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437 | skip_field(csa); |
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438 | skip_field(csa); |
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439 | skip_field(csa); |
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440 | goto loop; |
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441 | done: return; |
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442 | } |
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443 | |
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444 | static void read_columns(struct csa *csa) |
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445 | { /* read COLUMNS section */ |
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446 | int i, j, f, len, kind = GLP_CV, *ind; |
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447 | double aij, *val; |
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448 | char name[255+1], *flag; |
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449 | /* allocate working arrays */ |
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450 | csa->work1 = ind = xcalloc(1+csa->P->m, sizeof(int)); |
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451 | csa->work2 = val = xcalloc(1+csa->P->m, sizeof(double)); |
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452 | csa->work3 = flag = xcalloc(1+csa->P->m, sizeof(char)); |
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453 | memset(&flag[1], 0, csa->P->m); |
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454 | /* no current column exists */ |
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455 | j = 0, len = 0; |
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456 | loop: if (indicator(csa, 0)) goto done; |
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457 | /* field 1 must be blank */ |
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458 | if (csa->deck) |
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459 | { read_field(csa); |
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460 | if (csa->field[0] != '\0') |
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461 | error(csa, "field 1 must be blank\n"); |
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462 | } |
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463 | else |
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464 | csa->fldno++; |
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465 | /* field 2: column or kind name */ |
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466 | read_field(csa), patch_name(csa, csa->field); |
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467 | strcpy(name, csa->field); |
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468 | /* field 3: row name or keyword 'MARKER' */ |
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469 | read_field(csa), patch_name(csa, csa->field); |
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470 | if (strcmp(csa->field, "'MARKER'") == 0) |
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471 | { /* process kind data record */ |
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472 | /* field 4 must be blank */ |
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473 | if (csa->deck) |
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474 | { read_field(csa); |
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475 | if (csa->field[0] != '\0') |
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476 | error(csa, "field 4 must be blank\n"); |
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477 | } |
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478 | else |
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479 | csa->fldno++; |
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480 | /* field 5: keyword 'INTORG' or 'INTEND' */ |
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481 | read_field(csa), patch_name(csa, csa->field); |
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482 | if (strcmp(csa->field, "'INTORG'") == 0) |
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483 | kind = GLP_IV; |
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484 | else if (strcmp(csa->field, "'INTEND'") == 0) |
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485 | kind = GLP_CV; |
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486 | else if (csa->field[0] == '\0') |
---|
487 | error(csa, "missing keyword in field 5\n"); |
---|
488 | else |
---|
489 | error(csa, "invalid keyword in field 5\n"); |
---|
490 | /* field 6 must be blank */ |
---|
491 | skip_field(csa); |
---|
492 | goto loop; |
---|
493 | } |
---|
494 | /* process column name specified in field 2 */ |
---|
495 | if (name[0] == '\0') |
---|
496 | { /* the same column as in previous data record */ |
---|
497 | if (j == 0) |
---|
498 | error(csa, "missing column name in field 2\n"); |
---|
499 | } |
---|
500 | else if (j != 0 && strcmp(name, csa->P->col[j]->name) == 0) |
---|
501 | { /* the same column as in previous data record */ |
---|
502 | xassert(j != 0); |
---|
503 | } |
---|
504 | else |
---|
505 | { /* store the current column */ |
---|
506 | if (j != 0) |
---|
507 | { glp_set_mat_col(csa->P, j, len, ind, val); |
---|
508 | while (len > 0) flag[ind[len--]] = 0; |
---|
509 | } |
---|
510 | /* create new column */ |
---|
511 | if (glp_find_col(csa->P, name) != 0) |
---|
512 | error(csa, "column `%s' multiply specified\n", name); |
---|
513 | j = glp_add_cols(csa->P, 1); |
---|
514 | glp_set_col_name(csa->P, j, name); |
---|
515 | glp_set_col_kind(csa->P, j, kind); |
---|
516 | if (kind == GLP_CV) |
---|
517 | glp_set_col_bnds(csa->P, j, GLP_LO, 0.0, 0.0); |
---|
518 | else if (kind == GLP_IV) |
---|
519 | glp_set_col_bnds(csa->P, j, GLP_DB, 0.0, 1.0); |
---|
520 | else |
---|
521 | xassert(kind != kind); |
---|
522 | } |
---|
523 | /* process fields 3-4 and 5-6 */ |
---|
524 | for (f = 3; f <= 5; f += 2) |
---|
525 | { /* field 3 or 5: row name */ |
---|
526 | if (f == 3) |
---|
527 | { if (csa->field[0] == '\0') |
---|
528 | error(csa, "missing row name in field 3\n"); |
---|
529 | } |
---|
530 | else |
---|
531 | { read_field(csa), patch_name(csa, csa->field); |
---|
532 | if (csa->field[0] == '\0') |
---|
533 | { /* if field 5 is blank, field 6 also must be blank */ |
---|
534 | skip_field(csa); |
---|
535 | continue; |
---|
536 | } |
---|
537 | } |
---|
538 | i = glp_find_row(csa->P, csa->field); |
---|
539 | if (i == 0) |
---|
540 | error(csa, "row `%s' not found\n", csa->field); |
---|
541 | if (flag[i]) |
---|
542 | error(csa, "duplicate coefficient in row `%s'\n", |
---|
543 | csa->field); |
---|
544 | /* field 4 or 6: coefficient value */ |
---|
545 | aij = read_number(csa); |
---|
546 | if (fabs(aij) < csa->parm->tol_mps) aij = 0.0; |
---|
547 | len++, ind[len] = i, val[len] = aij, flag[i] = 1; |
---|
548 | } |
---|
549 | goto loop; |
---|
550 | done: /* store the last column */ |
---|
551 | if (j != 0) |
---|
552 | glp_set_mat_col(csa->P, j, len, ind, val); |
---|
553 | /* free working arrays */ |
---|
554 | xfree(ind); |
---|
555 | xfree(val); |
---|
556 | xfree(flag); |
---|
557 | csa->work1 = csa->work2 = csa->work3 = NULL; |
---|
558 | return; |
---|
559 | } |
---|
560 | |
---|
561 | static void read_rhs(struct csa *csa) |
---|
562 | { /* read RHS section */ |
---|
563 | int i, f, v, type; |
---|
564 | double rhs; |
---|
565 | char name[255+1], *flag; |
---|
566 | /* allocate working array */ |
---|
567 | csa->work3 = flag = xcalloc(1+csa->P->m, sizeof(char)); |
---|
568 | memset(&flag[1], 0, csa->P->m); |
---|
569 | /* no current RHS vector exists */ |
---|
570 | v = 0; |
---|
571 | loop: if (indicator(csa, 0)) goto done; |
---|
572 | /* field 1 must be blank */ |
---|
573 | if (csa->deck) |
---|
574 | { read_field(csa); |
---|
575 | if (csa->field[0] != '\0') |
---|
576 | error(csa, "field 1 must be blank\n"); |
---|
577 | } |
---|
578 | else |
---|
579 | csa->fldno++; |
---|
580 | /* field 2: RHS vector name */ |
---|
581 | read_field(csa), patch_name(csa, csa->field); |
---|
582 | if (csa->field[0] == '\0') |
---|
583 | { /* the same RHS vector as in previous data record */ |
---|
584 | if (v == 0) |
---|
585 | { warning(csa, "missing RHS vector name in field 2\n"); |
---|
586 | goto blnk; |
---|
587 | } |
---|
588 | } |
---|
589 | else if (v != 0 && strcmp(csa->field, name) == 0) |
---|
590 | { /* the same RHS vector as in previous data record */ |
---|
591 | xassert(v != 0); |
---|
592 | } |
---|
593 | else |
---|
594 | blnk: { /* new RHS vector */ |
---|
595 | if (v != 0) |
---|
596 | error(csa, "multiple RHS vectors not supported\n"); |
---|
597 | v++; |
---|
598 | strcpy(name, csa->field); |
---|
599 | } |
---|
600 | /* process fields 3-4 and 5-6 */ |
---|
601 | for (f = 3; f <= 5; f += 2) |
---|
602 | { /* field 3 or 5: row name */ |
---|
603 | read_field(csa), patch_name(csa, csa->field); |
---|
604 | if (csa->field[0] == '\0') |
---|
605 | { if (f == 3) |
---|
606 | error(csa, "missing row name in field 3\n"); |
---|
607 | else |
---|
608 | { /* if field 5 is blank, field 6 also must be blank */ |
---|
609 | skip_field(csa); |
---|
610 | continue; |
---|
611 | } |
---|
612 | } |
---|
613 | i = glp_find_row(csa->P, csa->field); |
---|
614 | if (i == 0) |
---|
615 | error(csa, "row `%s' not found\n", csa->field); |
---|
616 | if (flag[i]) |
---|
617 | error(csa, "duplicate right-hand side for row `%s'\n", |
---|
618 | csa->field); |
---|
619 | /* field 4 or 6: right-hand side value */ |
---|
620 | rhs = read_number(csa); |
---|
621 | if (fabs(rhs) < csa->parm->tol_mps) rhs = 0.0; |
---|
622 | type = csa->P->row[i]->type; |
---|
623 | if (type == GLP_FR) |
---|
624 | { if (i == csa->obj_row) |
---|
625 | glp_set_obj_coef(csa->P, 0, rhs); |
---|
626 | else if (rhs != 0.0) |
---|
627 | warning(csa, "non-zero right-hand side for free row `%s'" |
---|
628 | " ignored\n", csa->P->row[i]->name); |
---|
629 | } |
---|
630 | else |
---|
631 | glp_set_row_bnds(csa->P, i, type, rhs, rhs); |
---|
632 | flag[i] = 1; |
---|
633 | } |
---|
634 | goto loop; |
---|
635 | done: /* free working array */ |
---|
636 | xfree(flag); |
---|
637 | csa->work3 = NULL; |
---|
638 | return; |
---|
639 | } |
---|
640 | |
---|
641 | static void read_ranges(struct csa *csa) |
---|
642 | { /* read RANGES section */ |
---|
643 | int i, f, v, type; |
---|
644 | double rhs, rng; |
---|
645 | char name[255+1], *flag; |
---|
646 | /* allocate working array */ |
---|
647 | csa->work3 = flag = xcalloc(1+csa->P->m, sizeof(char)); |
---|
648 | memset(&flag[1], 0, csa->P->m); |
---|
649 | /* no current RANGES vector exists */ |
---|
650 | v = 0; |
---|
651 | loop: if (indicator(csa, 0)) goto done; |
---|
652 | /* field 1 must be blank */ |
---|
653 | if (csa->deck) |
---|
654 | { read_field(csa); |
---|
655 | if (csa->field[0] != '\0') |
---|
656 | error(csa, "field 1 must be blank\n"); |
---|
657 | } |
---|
658 | else |
---|
659 | csa->fldno++; |
---|
660 | /* field 2: RANGES vector name */ |
---|
661 | read_field(csa), patch_name(csa, csa->field); |
---|
662 | if (csa->field[0] == '\0') |
---|
663 | { /* the same RANGES vector as in previous data record */ |
---|
664 | if (v == 0) |
---|
665 | { warning(csa, "missing RANGES vector name in field 2\n"); |
---|
666 | goto blnk; |
---|
667 | } |
---|
668 | } |
---|
669 | else if (v != 0 && strcmp(csa->field, name) == 0) |
---|
670 | { /* the same RANGES vector as in previous data record */ |
---|
671 | xassert(v != 0); |
---|
672 | } |
---|
673 | else |
---|
674 | blnk: { /* new RANGES vector */ |
---|
675 | if (v != 0) |
---|
676 | error(csa, "multiple RANGES vectors not supported\n"); |
---|
677 | v++; |
---|
678 | strcpy(name, csa->field); |
---|
679 | } |
---|
680 | /* process fields 3-4 and 5-6 */ |
---|
681 | for (f = 3; f <= 5; f += 2) |
---|
682 | { /* field 3 or 5: row name */ |
---|
683 | read_field(csa), patch_name(csa, csa->field); |
---|
684 | if (csa->field[0] == '\0') |
---|
685 | { if (f == 3) |
---|
686 | error(csa, "missing row name in field 3\n"); |
---|
687 | else |
---|
688 | { /* if field 5 is blank, field 6 also must be blank */ |
---|
689 | skip_field(csa); |
---|
690 | continue; |
---|
691 | } |
---|
692 | } |
---|
693 | i = glp_find_row(csa->P, csa->field); |
---|
694 | if (i == 0) |
---|
695 | error(csa, "row `%s' not found\n", csa->field); |
---|
696 | if (flag[i]) |
---|
697 | error(csa, "duplicate range for row `%s'\n", csa->field); |
---|
698 | /* field 4 or 6: range value */ |
---|
699 | rng = read_number(csa); |
---|
700 | if (fabs(rng) < csa->parm->tol_mps) rng = 0.0; |
---|
701 | type = csa->P->row[i]->type; |
---|
702 | if (type == GLP_FR) |
---|
703 | warning(csa, "range for free row `%s' ignored\n", |
---|
704 | csa->P->row[i]->name); |
---|
705 | else if (type == GLP_LO) |
---|
706 | { rhs = csa->P->row[i]->lb; |
---|
707 | glp_set_row_bnds(csa->P, i, rhs == 0.0 ? GLP_FX : GLP_DB, |
---|
708 | rhs, rhs + fabs(rng)); |
---|
709 | } |
---|
710 | else if (type == GLP_UP) |
---|
711 | { rhs = csa->P->row[i]->ub; |
---|
712 | glp_set_row_bnds(csa->P, i, rhs == 0.0 ? GLP_FX : GLP_DB, |
---|
713 | rhs - fabs(rng), rhs); |
---|
714 | } |
---|
715 | else if (type == GLP_FX) |
---|
716 | { rhs = csa->P->row[i]->lb; |
---|
717 | if (rng > 0.0) |
---|
718 | glp_set_row_bnds(csa->P, i, GLP_DB, rhs, rhs + rng); |
---|
719 | else if (rng < 0.0) |
---|
720 | glp_set_row_bnds(csa->P, i, GLP_DB, rhs + rng, rhs); |
---|
721 | } |
---|
722 | else |
---|
723 | xassert(type != type); |
---|
724 | flag[i] = 1; |
---|
725 | } |
---|
726 | goto loop; |
---|
727 | done: /* free working array */ |
---|
728 | xfree(flag); |
---|
729 | csa->work3 = NULL; |
---|
730 | return; |
---|
731 | } |
---|
732 | |
---|
733 | static void read_bounds(struct csa *csa) |
---|
734 | { /* read BOUNDS section */ |
---|
735 | GLPCOL *col; |
---|
736 | int j, v, mask, data; |
---|
737 | double bnd, lb, ub; |
---|
738 | char type[2+1], name[255+1], *flag; |
---|
739 | /* allocate working array */ |
---|
740 | csa->work3 = flag = xcalloc(1+csa->P->n, sizeof(char)); |
---|
741 | memset(&flag[1], 0, csa->P->n); |
---|
742 | /* no current BOUNDS vector exists */ |
---|
743 | v = 0; |
---|
744 | loop: if (indicator(csa, 0)) goto done; |
---|
745 | /* field 1: bound type */ |
---|
746 | read_field(csa); |
---|
747 | if (strcmp(csa->field, "LO") == 0) |
---|
748 | mask = 0x01, data = 1; |
---|
749 | else if (strcmp(csa->field, "UP") == 0) |
---|
750 | mask = 0x10, data = 1; |
---|
751 | else if (strcmp(csa->field, "FX") == 0) |
---|
752 | mask = 0x11, data = 1; |
---|
753 | else if (strcmp(csa->field, "FR") == 0) |
---|
754 | mask = 0x11, data = 0; |
---|
755 | else if (strcmp(csa->field, "MI") == 0) |
---|
756 | mask = 0x01, data = 0; |
---|
757 | else if (strcmp(csa->field, "PL") == 0) |
---|
758 | mask = 0x10, data = 0; |
---|
759 | else if (strcmp(csa->field, "LI") == 0) |
---|
760 | mask = 0x01, data = 1; |
---|
761 | else if (strcmp(csa->field, "UI") == 0) |
---|
762 | mask = 0x10, data = 1; |
---|
763 | else if (strcmp(csa->field, "BV") == 0) |
---|
764 | mask = 0x11, data = 0; |
---|
765 | else if (csa->field[0] == '\0') |
---|
766 | error(csa, "missing bound type in field 1\n"); |
---|
767 | else |
---|
768 | error(csa, "invalid bound type in field 1\n"); |
---|
769 | strcpy(type, csa->field); |
---|
770 | /* field 2: BOUNDS vector name */ |
---|
771 | read_field(csa), patch_name(csa, csa->field); |
---|
772 | if (csa->field[0] == '\0') |
---|
773 | { /* the same BOUNDS vector as in previous data record */ |
---|
774 | if (v == 0) |
---|
775 | { warning(csa, "missing BOUNDS vector name in field 2\n"); |
---|
776 | goto blnk; |
---|
777 | } |
---|
778 | } |
---|
779 | else if (v != 0 && strcmp(csa->field, name) == 0) |
---|
780 | { /* the same BOUNDS vector as in previous data record */ |
---|
781 | xassert(v != 0); |
---|
782 | } |
---|
783 | else |
---|
784 | blnk: { /* new BOUNDS vector */ |
---|
785 | if (v != 0) |
---|
786 | error(csa, "multiple BOUNDS vectors not supported\n"); |
---|
787 | v++; |
---|
788 | strcpy(name, csa->field); |
---|
789 | } |
---|
790 | /* field 3: column name */ |
---|
791 | read_field(csa), patch_name(csa, csa->field); |
---|
792 | if (csa->field[0] == '\0') |
---|
793 | error(csa, "missing column name in field 3\n"); |
---|
794 | j = glp_find_col(csa->P, csa->field); |
---|
795 | if (j == 0) |
---|
796 | error(csa, "column `%s' not found\n", csa->field); |
---|
797 | if ((flag[j] & mask) == 0x01) |
---|
798 | error(csa, "duplicate lower bound for column `%s'\n", |
---|
799 | csa->field); |
---|
800 | if ((flag[j] & mask) == 0x10) |
---|
801 | error(csa, "duplicate upper bound for column `%s'\n", |
---|
802 | csa->field); |
---|
803 | xassert((flag[j] & mask) == 0x00); |
---|
804 | /* field 4: bound value */ |
---|
805 | if (data) |
---|
806 | { bnd = read_number(csa); |
---|
807 | if (fabs(bnd) < csa->parm->tol_mps) bnd = 0.0; |
---|
808 | } |
---|
809 | else |
---|
810 | read_field(csa), bnd = 0.0; |
---|
811 | /* get current column bounds */ |
---|
812 | col = csa->P->col[j]; |
---|
813 | if (col->type == GLP_FR) |
---|
814 | lb = -DBL_MAX, ub = +DBL_MAX; |
---|
815 | else if (col->type == GLP_LO) |
---|
816 | lb = col->lb, ub = +DBL_MAX; |
---|
817 | else if (col->type == GLP_UP) |
---|
818 | lb = -DBL_MAX, ub = col->ub; |
---|
819 | else if (col->type == GLP_DB) |
---|
820 | lb = col->lb, ub = col->ub; |
---|
821 | else if (col->type == GLP_FX) |
---|
822 | lb = ub = col->lb; |
---|
823 | else |
---|
824 | xassert(col != col); |
---|
825 | /* change column bounds */ |
---|
826 | if (strcmp(type, "LO") == 0) |
---|
827 | lb = bnd; |
---|
828 | else if (strcmp(type, "UP") == 0) |
---|
829 | ub = bnd; |
---|
830 | else if (strcmp(type, "FX") == 0) |
---|
831 | lb = ub = bnd; |
---|
832 | else if (strcmp(type, "FR") == 0) |
---|
833 | lb = -DBL_MAX, ub = +DBL_MAX; |
---|
834 | else if (strcmp(type, "MI") == 0) |
---|
835 | lb = -DBL_MAX; |
---|
836 | else if (strcmp(type, "PL") == 0) |
---|
837 | ub = +DBL_MAX; |
---|
838 | else if (strcmp(type, "LI") == 0) |
---|
839 | { glp_set_col_kind(csa->P, j, GLP_IV); |
---|
840 | lb = ceil(bnd); |
---|
841 | } |
---|
842 | else if (strcmp(type, "UI") == 0) |
---|
843 | { glp_set_col_kind(csa->P, j, GLP_IV); |
---|
844 | ub = floor(bnd); |
---|
845 | } |
---|
846 | else if (strcmp(type, "BV") == 0) |
---|
847 | { glp_set_col_kind(csa->P, j, GLP_IV); |
---|
848 | lb = 0.0, ub = 1.0; |
---|
849 | } |
---|
850 | else |
---|
851 | xassert(type != type); |
---|
852 | /* set new column bounds */ |
---|
853 | if (lb == -DBL_MAX && ub == +DBL_MAX) |
---|
854 | glp_set_col_bnds(csa->P, j, GLP_FR, lb, ub); |
---|
855 | else if (ub == +DBL_MAX) |
---|
856 | glp_set_col_bnds(csa->P, j, GLP_LO, lb, ub); |
---|
857 | else if (lb == -DBL_MAX) |
---|
858 | glp_set_col_bnds(csa->P, j, GLP_UP, lb, ub); |
---|
859 | else if (lb != ub) |
---|
860 | glp_set_col_bnds(csa->P, j, GLP_DB, lb, ub); |
---|
861 | else |
---|
862 | glp_set_col_bnds(csa->P, j, GLP_FX, lb, ub); |
---|
863 | flag[j] |= (char)mask; |
---|
864 | /* fields 5 and 6 must be blank */ |
---|
865 | skip_field(csa); |
---|
866 | skip_field(csa); |
---|
867 | goto loop; |
---|
868 | done: /* free working array */ |
---|
869 | xfree(flag); |
---|
870 | csa->work3 = NULL; |
---|
871 | return; |
---|
872 | } |
---|
873 | |
---|
874 | int glp_read_mps(glp_prob *P, int fmt, const glp_mpscp *parm, |
---|
875 | const char *fname) |
---|
876 | { /* read problem data in MPS format */ |
---|
877 | glp_mpscp _parm; |
---|
878 | struct csa _csa, *csa = &_csa; |
---|
879 | int ret; |
---|
880 | xprintf("Reading problem data from `%s'...\n", fname); |
---|
881 | if (!(fmt == GLP_MPS_DECK || fmt == GLP_MPS_FILE)) |
---|
882 | xerror("glp_read_mps: fmt = %d; invalid parameter\n", fmt); |
---|
883 | if (parm == NULL) |
---|
884 | glp_init_mpscp(&_parm), parm = &_parm; |
---|
885 | /* check control parameters */ |
---|
886 | check_parm("glp_read_mps", parm); |
---|
887 | /* initialize common storage area */ |
---|
888 | csa->P = P; |
---|
889 | csa->deck = (fmt == GLP_MPS_DECK); |
---|
890 | csa->parm = parm; |
---|
891 | csa->fname = fname; |
---|
892 | csa->fp = NULL; |
---|
893 | if (setjmp(csa->jump)) |
---|
894 | { ret = 1; |
---|
895 | goto done; |
---|
896 | } |
---|
897 | csa->recno = csa->recpos = 0; |
---|
898 | csa->c = '\n'; |
---|
899 | csa->fldno = 0; |
---|
900 | csa->field[0] = '\0'; |
---|
901 | csa->w80 = csa->wef = 0; |
---|
902 | csa->obj_row = 0; |
---|
903 | csa->work1 = csa->work2 = csa->work3 = NULL; |
---|
904 | /* erase problem object */ |
---|
905 | glp_erase_prob(P); |
---|
906 | glp_create_index(P); |
---|
907 | /* open input MPS file */ |
---|
908 | csa->fp = xfopen(fname, "r"); |
---|
909 | if (csa->fp == NULL) |
---|
910 | { xprintf("Unable to open `%s' - %s\n", fname, xerrmsg()); |
---|
911 | ret = 1; |
---|
912 | goto done; |
---|
913 | } |
---|
914 | /* read NAME indicator record */ |
---|
915 | read_name(csa); |
---|
916 | if (P->name != NULL) |
---|
917 | xprintf("Problem: %s\n", P->name); |
---|
918 | /* read ROWS section */ |
---|
919 | if (!(indicator(csa, 0) && strcmp(csa->field, "ROWS") == 0)) |
---|
920 | error(csa, "missing ROWS indicator record\n"); |
---|
921 | read_rows(csa); |
---|
922 | /* determine objective row */ |
---|
923 | if (parm->obj_name == NULL || parm->obj_name[0] == '\0') |
---|
924 | { /* use the first row of N type */ |
---|
925 | int i; |
---|
926 | for (i = 1; i <= P->m; i++) |
---|
927 | { if (P->row[i]->type == GLP_FR) |
---|
928 | { csa->obj_row = i; |
---|
929 | break; |
---|
930 | } |
---|
931 | } |
---|
932 | if (csa->obj_row == 0) |
---|
933 | warning(csa, "unable to determine objective row\n"); |
---|
934 | } |
---|
935 | else |
---|
936 | { /* use a row with specified name */ |
---|
937 | int i; |
---|
938 | for (i = 1; i <= P->m; i++) |
---|
939 | { xassert(P->row[i]->name != NULL); |
---|
940 | if (strcmp(parm->obj_name, P->row[i]->name) == 0) |
---|
941 | { csa->obj_row = i; |
---|
942 | break; |
---|
943 | } |
---|
944 | } |
---|
945 | if (csa->obj_row == 0) |
---|
946 | error(csa, "objective row `%s' not found\n", |
---|
947 | parm->obj_name); |
---|
948 | } |
---|
949 | if (csa->obj_row != 0) |
---|
950 | { glp_set_obj_name(P, P->row[csa->obj_row]->name); |
---|
951 | xprintf("Objective: %s\n", P->obj); |
---|
952 | } |
---|
953 | /* read COLUMNS section */ |
---|
954 | if (strcmp(csa->field, "COLUMNS") != 0) |
---|
955 | error(csa, "missing COLUMNS indicator record\n"); |
---|
956 | read_columns(csa); |
---|
957 | /* set objective coefficients */ |
---|
958 | if (csa->obj_row != 0) |
---|
959 | { GLPAIJ *aij; |
---|
960 | for (aij = P->row[csa->obj_row]->ptr; aij != NULL; aij = |
---|
961 | aij->r_next) glp_set_obj_coef(P, aij->col->j, aij->val); |
---|
962 | } |
---|
963 | /* read optional RHS section */ |
---|
964 | if (strcmp(csa->field, "RHS") == 0) |
---|
965 | read_rhs(csa); |
---|
966 | /* read optional RANGES section */ |
---|
967 | if (strcmp(csa->field, "RANGES") == 0) |
---|
968 | read_ranges(csa); |
---|
969 | /* read optional BOUNDS section */ |
---|
970 | if (strcmp(csa->field, "BOUNDS") == 0) |
---|
971 | read_bounds(csa); |
---|
972 | /* read ENDATA indicator record */ |
---|
973 | if (strcmp(csa->field, "ENDATA") != 0) |
---|
974 | error(csa, "invalid use of %s indicator record\n", |
---|
975 | csa->field); |
---|
976 | /* print some statistics */ |
---|
977 | xprintf("%d row%s, %d column%s, %d non-zero%s\n", |
---|
978 | P->m, P->m == 1 ? "" : "s", P->n, P->n == 1 ? "" : "s", |
---|
979 | P->nnz, P->nnz == 1 ? "" : "s"); |
---|
980 | if (glp_get_num_int(P) > 0) |
---|
981 | { int ni = glp_get_num_int(P); |
---|
982 | int nb = glp_get_num_bin(P); |
---|
983 | if (ni == 1) |
---|
984 | { if (nb == 0) |
---|
985 | xprintf("One variable is integer\n"); |
---|
986 | else |
---|
987 | xprintf("One variable is binary\n"); |
---|
988 | } |
---|
989 | else |
---|
990 | { xprintf("%d integer variables, ", ni); |
---|
991 | if (nb == 0) |
---|
992 | xprintf("none"); |
---|
993 | else if (nb == 1) |
---|
994 | xprintf("one"); |
---|
995 | else if (nb == ni) |
---|
996 | xprintf("all"); |
---|
997 | else |
---|
998 | xprintf("%d", nb); |
---|
999 | xprintf(" of which %s binary\n", nb == 1 ? "is" : "are"); |
---|
1000 | } |
---|
1001 | } |
---|
1002 | xprintf("%d records were read\n", csa->recno); |
---|
1003 | /* problem data has been successfully read */ |
---|
1004 | glp_delete_index(P); |
---|
1005 | glp_sort_matrix(P); |
---|
1006 | ret = 0; |
---|
1007 | done: if (csa->fp != NULL) xfclose(csa->fp); |
---|
1008 | if (csa->work1 != NULL) xfree(csa->work1); |
---|
1009 | if (csa->work2 != NULL) xfree(csa->work2); |
---|
1010 | if (csa->work3 != NULL) xfree(csa->work3); |
---|
1011 | if (ret != 0) glp_erase_prob(P); |
---|
1012 | return ret; |
---|
1013 | } |
---|
1014 | |
---|
1015 | /*********************************************************************** |
---|
1016 | * NAME |
---|
1017 | * |
---|
1018 | * glp_write_mps - write problem data in MPS format |
---|
1019 | * |
---|
1020 | * SYNOPSIS |
---|
1021 | * |
---|
1022 | * int glp_write_mps(glp_prob *P, int fmt, const glp_mpscp *parm, |
---|
1023 | * const char *fname); |
---|
1024 | * |
---|
1025 | * DESCRIPTION |
---|
1026 | * |
---|
1027 | * The routine glp_write_mps writes problem data in MPS format to a |
---|
1028 | * text file. |
---|
1029 | * |
---|
1030 | * The parameter fmt specifies the version of MPS format: |
---|
1031 | * |
---|
1032 | * GLP_MPS_DECK - fixed (ancient) MPS format; |
---|
1033 | * GLP_MPS_FILE - free (modern) MPS format. |
---|
1034 | * |
---|
1035 | * The parameter parm is a pointer to the structure glp_mpscp, which |
---|
1036 | * specifies control parameters used by the routine. If parm is NULL, |
---|
1037 | * the routine uses default settings. |
---|
1038 | * |
---|
1039 | * The character string fname specifies a name of the text file to be |
---|
1040 | * written. |
---|
1041 | * |
---|
1042 | * RETURNS |
---|
1043 | * |
---|
1044 | * If the operation was successful, the routine glp_read_mps returns |
---|
1045 | * zero. Otherwise, it prints an error message and returns non-zero. */ |
---|
1046 | |
---|
1047 | #define csa csa1 |
---|
1048 | |
---|
1049 | struct csa |
---|
1050 | { /* common storage area */ |
---|
1051 | glp_prob *P; |
---|
1052 | /* pointer to problem object */ |
---|
1053 | int deck; |
---|
1054 | /* MPS format (0 - free, 1 - fixed) */ |
---|
1055 | const glp_mpscp *parm; |
---|
1056 | /* pointer to control parameters */ |
---|
1057 | char field[255+1]; |
---|
1058 | /* field buffer */ |
---|
1059 | }; |
---|
1060 | |
---|
1061 | static char *mps_name(struct csa *csa) |
---|
1062 | { /* make problem name */ |
---|
1063 | char *f; |
---|
1064 | if (csa->P->name == NULL) |
---|
1065 | csa->field[0] = '\0'; |
---|
1066 | else if (csa->deck) |
---|
1067 | { strncpy(csa->field, csa->P->name, 8); |
---|
1068 | csa->field[8] = '\0'; |
---|
1069 | } |
---|
1070 | else |
---|
1071 | strcpy(csa->field, csa->P->name); |
---|
1072 | for (f = csa->field; *f != '\0'; f++) |
---|
1073 | if (*f == ' ') *f = '_'; |
---|
1074 | return csa->field; |
---|
1075 | } |
---|
1076 | |
---|
1077 | static char *row_name(struct csa *csa, int i) |
---|
1078 | { /* make i-th row name */ |
---|
1079 | char *f; |
---|
1080 | xassert(0 <= i && i <= csa->P->m); |
---|
1081 | if (i == 0 || csa->P->row[i]->name == NULL || |
---|
1082 | csa->deck && strlen(csa->P->row[i]->name) > 8) |
---|
1083 | sprintf(csa->field, "R%07d", i); |
---|
1084 | else |
---|
1085 | { strcpy(csa->field, csa->P->row[i]->name); |
---|
1086 | for (f = csa->field; *f != '\0'; f++) |
---|
1087 | if (*f == ' ') *f = '_'; |
---|
1088 | } |
---|
1089 | return csa->field; |
---|
1090 | } |
---|
1091 | |
---|
1092 | static char *col_name(struct csa *csa, int j) |
---|
1093 | { /* make j-th column name */ |
---|
1094 | char *f; |
---|
1095 | xassert(1 <= j && j <= csa->P->n); |
---|
1096 | if (csa->P->col[j]->name == NULL || |
---|
1097 | csa->deck && strlen(csa->P->col[j]->name) > 8) |
---|
1098 | sprintf(csa->field, "C%07d", j); |
---|
1099 | else |
---|
1100 | { strcpy(csa->field, csa->P->col[j]->name); |
---|
1101 | for (f = csa->field; *f != '\0'; f++) |
---|
1102 | if (*f == ' ') *f = '_'; |
---|
1103 | } |
---|
1104 | return csa->field; |
---|
1105 | } |
---|
1106 | |
---|
1107 | static char *mps_numb(struct csa *csa, double val) |
---|
1108 | { /* format floating-point number */ |
---|
1109 | int dig; |
---|
1110 | char *exp; |
---|
1111 | for (dig = 12; dig >= 6; dig--) |
---|
1112 | { if (val != 0.0 && fabs(val) < 0.002) |
---|
1113 | sprintf(csa->field, "%.*E", dig-1, val); |
---|
1114 | else |
---|
1115 | sprintf(csa->field, "%.*G", dig, val); |
---|
1116 | exp = strchr(csa->field, 'E'); |
---|
1117 | if (exp != NULL) |
---|
1118 | sprintf(exp+1, "%d", atoi(exp+1)); |
---|
1119 | if (strlen(csa->field) <= 12) break; |
---|
1120 | } |
---|
1121 | xassert(strlen(csa->field) <= 12); |
---|
1122 | return csa->field; |
---|
1123 | } |
---|
1124 | |
---|
1125 | int glp_write_mps(glp_prob *P, int fmt, const glp_mpscp *parm, |
---|
1126 | const char *fname) |
---|
1127 | { /* write problem data in MPS format */ |
---|
1128 | glp_mpscp _parm; |
---|
1129 | struct csa _csa, *csa = &_csa; |
---|
1130 | XFILE *fp; |
---|
1131 | int out_obj, one_col = 0, empty = 0; |
---|
1132 | int i, j, recno, marker, count, gap, ret; |
---|
1133 | xprintf("Writing problem data to `%s'...\n", fname); |
---|
1134 | if (!(fmt == GLP_MPS_DECK || fmt == GLP_MPS_FILE)) |
---|
1135 | xerror("glp_write_mps: fmt = %d; invalid parameter\n", fmt); |
---|
1136 | if (parm == NULL) |
---|
1137 | glp_init_mpscp(&_parm), parm = &_parm; |
---|
1138 | /* check control parameters */ |
---|
1139 | check_parm("glp_write_mps", parm); |
---|
1140 | /* initialize common storage area */ |
---|
1141 | csa->P = P; |
---|
1142 | csa->deck = (fmt == GLP_MPS_DECK); |
---|
1143 | csa->parm = parm; |
---|
1144 | /* create output MPS file */ |
---|
1145 | fp = xfopen(fname, "w"), recno = 0; |
---|
1146 | if (fp == NULL) |
---|
1147 | { xprintf("Unable to create `%s' - %s\n", fname, xerrmsg()); |
---|
1148 | ret = 1; |
---|
1149 | goto done; |
---|
1150 | } |
---|
1151 | /* write comment records */ |
---|
1152 | xfprintf(fp, "* %-*s%s\n", P->name == NULL ? 1 : 12, "Problem:", |
---|
1153 | P->name == NULL ? "" : P->name), recno++; |
---|
1154 | xfprintf(fp, "* %-12s%s\n", "Class:", glp_get_num_int(P) == 0 ? |
---|
1155 | "LP" : "MIP"), recno++; |
---|
1156 | xfprintf(fp, "* %-12s%d\n", "Rows:", P->m), recno++; |
---|
1157 | if (glp_get_num_int(P) == 0) |
---|
1158 | xfprintf(fp, "* %-12s%d\n", "Columns:", P->n), recno++; |
---|
1159 | else |
---|
1160 | xfprintf(fp, "* %-12s%d (%d integer, %d binary)\n", |
---|
1161 | "Columns:", P->n, glp_get_num_int(P), glp_get_num_bin(P)), |
---|
1162 | recno++; |
---|
1163 | xfprintf(fp, "* %-12s%d\n", "Non-zeros:", P->nnz), recno++; |
---|
1164 | xfprintf(fp, "* %-12s%s\n", "Format:", csa->deck ? "Fixed MPS" : |
---|
1165 | "Free MPS"), recno++; |
---|
1166 | xfprintf(fp, "*\n", recno++); |
---|
1167 | /* write NAME indicator record */ |
---|
1168 | xfprintf(fp, "NAME%*s%s\n", |
---|
1169 | P->name == NULL ? 0 : csa->deck ? 10 : 1, "", mps_name(csa)), |
---|
1170 | recno++; |
---|
1171 | #if 1 |
---|
1172 | /* determine whether to write the objective row */ |
---|
1173 | out_obj = 1; |
---|
1174 | for (i = 1; i <= P->m; i++) |
---|
1175 | { if (P->row[i]->type == GLP_FR) |
---|
1176 | { out_obj = 0; |
---|
1177 | break; |
---|
1178 | } |
---|
1179 | } |
---|
1180 | #endif |
---|
1181 | /* write ROWS section */ |
---|
1182 | xfprintf(fp, "ROWS\n"), recno++; |
---|
1183 | for (i = (out_obj ? 0 : 1); i <= P->m; i++) |
---|
1184 | { int type; |
---|
1185 | type = (i == 0 ? GLP_FR : P->row[i]->type); |
---|
1186 | if (type == GLP_FR) |
---|
1187 | type = 'N'; |
---|
1188 | else if (type == GLP_LO) |
---|
1189 | type = 'G'; |
---|
1190 | else if (type == GLP_UP) |
---|
1191 | type = 'L'; |
---|
1192 | else if (type == GLP_DB || type == GLP_FX) |
---|
1193 | type = 'E'; |
---|
1194 | else |
---|
1195 | xassert(type != type); |
---|
1196 | xfprintf(fp, " %c%*s%s\n", type, csa->deck ? 2 : 1, "", |
---|
1197 | row_name(csa, i)), recno++; |
---|
1198 | } |
---|
1199 | /* write COLUMNS section */ |
---|
1200 | xfprintf(fp, "COLUMNS\n"), recno++; |
---|
1201 | marker = 0; |
---|
1202 | for (j = 1; j <= P->n; j++) |
---|
1203 | { GLPAIJ cj, *aij; |
---|
1204 | int kind; |
---|
1205 | kind = P->col[j]->kind; |
---|
1206 | if (kind == GLP_CV) |
---|
1207 | { if (marker % 2 == 1) |
---|
1208 | { /* close current integer block */ |
---|
1209 | marker++; |
---|
1210 | xfprintf(fp, "%*sM%07d%*s'MARKER'%*s'INTEND'\n", |
---|
1211 | csa->deck ? 4 : 1, "", marker, csa->deck ? 2 : 1, "", |
---|
1212 | csa->deck ? 17 : 1, ""), recno++; |
---|
1213 | } |
---|
1214 | } |
---|
1215 | else if (kind == GLP_IV) |
---|
1216 | { if (marker % 2 == 0) |
---|
1217 | { /* open new integer block */ |
---|
1218 | marker++; |
---|
1219 | xfprintf(fp, "%*sM%07d%*s'MARKER'%*s'INTORG'\n", |
---|
1220 | csa->deck ? 4 : 1, "", marker, csa->deck ? 2 : 1, "", |
---|
1221 | csa->deck ? 17 : 1, ""), recno++; |
---|
1222 | } |
---|
1223 | } |
---|
1224 | else |
---|
1225 | xassert(kind != kind); |
---|
1226 | if (out_obj && P->col[j]->coef != 0.0) |
---|
1227 | { /* make fake objective coefficient */ |
---|
1228 | aij = &cj; |
---|
1229 | aij->row = NULL; |
---|
1230 | aij->val = P->col[j]->coef; |
---|
1231 | aij->c_next = P->col[j]->ptr; |
---|
1232 | } |
---|
1233 | else |
---|
1234 | aij = P->col[j]->ptr; |
---|
1235 | #if 1 /* FIXME */ |
---|
1236 | if (aij == NULL) |
---|
1237 | { /* empty column */ |
---|
1238 | empty++; |
---|
1239 | xfprintf(fp, "%*s%-*s", csa->deck ? 4 : 1, "", |
---|
1240 | csa->deck ? 8 : 1, col_name(csa, j)); |
---|
1241 | /* we need a row */ |
---|
1242 | xassert(P->m > 0); |
---|
1243 | xfprintf(fp, "%*s%-*s", |
---|
1244 | csa->deck ? 2 : 1, "", csa->deck ? 8 : 1, |
---|
1245 | row_name(csa, 1)); |
---|
1246 | xfprintf(fp, "%*s0%*s$ empty column\n", |
---|
1247 | csa->deck ? 13 : 1, "", csa->deck ? 3 : 1, ""), recno++; |
---|
1248 | } |
---|
1249 | #endif |
---|
1250 | count = 0; |
---|
1251 | for (aij = aij; aij != NULL; aij = aij->c_next) |
---|
1252 | { if (one_col || count % 2 == 0) |
---|
1253 | xfprintf(fp, "%*s%-*s", csa->deck ? 4 : 1, "", |
---|
1254 | csa->deck ? 8 : 1, col_name(csa, j)); |
---|
1255 | gap = (one_col || count % 2 == 0 ? 2 : 3); |
---|
1256 | xfprintf(fp, "%*s%-*s", |
---|
1257 | csa->deck ? gap : 1, "", csa->deck ? 8 : 1, |
---|
1258 | row_name(csa, aij->row == NULL ? 0 : aij->row->i)); |
---|
1259 | xfprintf(fp, "%*s%*s", |
---|
1260 | csa->deck ? 2 : 1, "", csa->deck ? 12 : 1, |
---|
1261 | mps_numb(csa, aij->val)), count++; |
---|
1262 | if (one_col || count % 2 == 0) |
---|
1263 | xfprintf(fp, "\n"), recno++; |
---|
1264 | } |
---|
1265 | if (!(one_col || count % 2 == 0)) |
---|
1266 | xfprintf(fp, "\n"), recno++; |
---|
1267 | } |
---|
1268 | if (marker % 2 == 1) |
---|
1269 | { /* close last integer block */ |
---|
1270 | marker++; |
---|
1271 | xfprintf(fp, "%*sM%07d%*s'MARKER'%*s'INTEND'\n", |
---|
1272 | csa->deck ? 4 : 1, "", marker, csa->deck ? 2 : 1, "", |
---|
1273 | csa->deck ? 17 : 1, ""), recno++; |
---|
1274 | } |
---|
1275 | #if 1 |
---|
1276 | if (empty > 0) |
---|
1277 | xprintf("Warning: problem has %d empty column(s)\n", empty); |
---|
1278 | #endif |
---|
1279 | /* write RHS section */ |
---|
1280 | xfprintf(fp, "RHS\n"), recno++; |
---|
1281 | count = 0; |
---|
1282 | for (i = (out_obj ? 0 : 1); i <= P->m; i++) |
---|
1283 | { int type; |
---|
1284 | double rhs; |
---|
1285 | if (i == 0) |
---|
1286 | rhs = P->c0; |
---|
1287 | else |
---|
1288 | { type = P->row[i]->type; |
---|
1289 | if (type == GLP_FR) |
---|
1290 | rhs = 0.0; |
---|
1291 | else if (type == GLP_LO) |
---|
1292 | rhs = P->row[i]->lb; |
---|
1293 | else if (type == GLP_UP) |
---|
1294 | rhs = P->row[i]->ub; |
---|
1295 | else if (type == GLP_DB || type == GLP_FX) |
---|
1296 | rhs = P->row[i]->lb; |
---|
1297 | else |
---|
1298 | xassert(type != type); |
---|
1299 | } |
---|
1300 | if (rhs != 0.0) |
---|
1301 | { if (one_col || count % 2 == 0) |
---|
1302 | xfprintf(fp, "%*s%-*s", csa->deck ? 4 : 1, "", |
---|
1303 | csa->deck ? 8 : 1, "RHS1"); |
---|
1304 | gap = (one_col || count % 2 == 0 ? 2 : 3); |
---|
1305 | xfprintf(fp, "%*s%-*s", |
---|
1306 | csa->deck ? gap : 1, "", csa->deck ? 8 : 1, |
---|
1307 | row_name(csa, i)); |
---|
1308 | xfprintf(fp, "%*s%*s", |
---|
1309 | csa->deck ? 2 : 1, "", csa->deck ? 12 : 1, |
---|
1310 | mps_numb(csa, rhs)), count++; |
---|
1311 | if (one_col || count % 2 == 0) |
---|
1312 | xfprintf(fp, "\n"), recno++; |
---|
1313 | } |
---|
1314 | } |
---|
1315 | if (!(one_col || count % 2 == 0)) |
---|
1316 | xfprintf(fp, "\n"), recno++; |
---|
1317 | /* write RANGES section */ |
---|
1318 | for (i = P->m; i >= 1; i--) |
---|
1319 | if (P->row[i]->type == GLP_DB) break; |
---|
1320 | if (i == 0) goto bnds; |
---|
1321 | xfprintf(fp, "RANGES\n"), recno++; |
---|
1322 | count = 0; |
---|
1323 | for (i = 1; i <= P->m; i++) |
---|
1324 | { if (P->row[i]->type == GLP_DB) |
---|
1325 | { if (one_col || count % 2 == 0) |
---|
1326 | xfprintf(fp, "%*s%-*s", csa->deck ? 4 : 1, "", |
---|
1327 | csa->deck ? 8 : 1, "RNG1"); |
---|
1328 | gap = (one_col || count % 2 == 0 ? 2 : 3); |
---|
1329 | xfprintf(fp, "%*s%-*s", |
---|
1330 | csa->deck ? gap : 1, "", csa->deck ? 8 : 1, |
---|
1331 | row_name(csa, i)); |
---|
1332 | xfprintf(fp, "%*s%*s", |
---|
1333 | csa->deck ? 2 : 1, "", csa->deck ? 12 : 1, |
---|
1334 | mps_numb(csa, P->row[i]->ub - P->row[i]->lb)), count++; |
---|
1335 | if (one_col || count % 2 == 0) |
---|
1336 | xfprintf(fp, "\n"), recno++; |
---|
1337 | } |
---|
1338 | } |
---|
1339 | if (!(one_col || count % 2 == 0)) |
---|
1340 | xfprintf(fp, "\n"), recno++; |
---|
1341 | bnds: /* write BOUNDS section */ |
---|
1342 | for (j = P->n; j >= 1; j--) |
---|
1343 | if (!(P->col[j]->type == GLP_LO && P->col[j]->lb == 0.0)) |
---|
1344 | break; |
---|
1345 | if (j == 0) goto endt; |
---|
1346 | xfprintf(fp, "BOUNDS\n"), recno++; |
---|
1347 | for (j = 1; j <= P->n; j++) |
---|
1348 | { int type, data[2]; |
---|
1349 | double bnd[2]; |
---|
1350 | char *spec[2]; |
---|
1351 | spec[0] = spec[1] = NULL; |
---|
1352 | type = P->col[j]->type; |
---|
1353 | if (type == GLP_FR) |
---|
1354 | spec[0] = "FR", data[0] = 0; |
---|
1355 | else if (type == GLP_LO) |
---|
1356 | { if (P->col[j]->lb != 0.0) |
---|
1357 | spec[0] = "LO", data[0] = 1, bnd[0] = P->col[j]->lb; |
---|
1358 | if (P->col[j]->kind == GLP_IV) |
---|
1359 | spec[1] = "PL", data[1] = 0; |
---|
1360 | } |
---|
1361 | else if (type == GLP_UP) |
---|
1362 | { spec[0] = "MI", data[0] = 0; |
---|
1363 | spec[1] = "UP", data[1] = 1, bnd[1] = P->col[j]->ub; |
---|
1364 | } |
---|
1365 | else if (type == GLP_DB) |
---|
1366 | { if (P->col[j]->lb != 0.0) |
---|
1367 | spec[0] = "LO", data[0] = 1, bnd[0] = P->col[j]->lb; |
---|
1368 | spec[1] = "UP", data[1] = 1, bnd[1] = P->col[j]->ub; |
---|
1369 | } |
---|
1370 | else if (type == GLP_FX) |
---|
1371 | spec[0] = "FX", data[0] = 1, bnd[0] = P->col[j]->lb; |
---|
1372 | else |
---|
1373 | xassert(type != type); |
---|
1374 | for (i = 0; i <= 1; i++) |
---|
1375 | { if (spec[i] != NULL) |
---|
1376 | { xfprintf(fp, " %s %-*s%*s%-*s", spec[i], |
---|
1377 | csa->deck ? 8 : 1, "BND1", csa->deck ? 2 : 1, "", |
---|
1378 | csa->deck ? 8 : 1, col_name(csa, j)); |
---|
1379 | if (data[i]) |
---|
1380 | xfprintf(fp, "%*s%*s", csa->deck ? 2 : 1, "", |
---|
1381 | csa->deck ? 12 : 1, mps_numb(csa, bnd[i])); |
---|
1382 | xfprintf(fp, "\n"), recno++; |
---|
1383 | } |
---|
1384 | } |
---|
1385 | } |
---|
1386 | endt: /* write ENDATA indicator record */ |
---|
1387 | xfprintf(fp, "ENDATA\n"), recno++; |
---|
1388 | xfflush(fp); |
---|
1389 | if (xferror(fp)) |
---|
1390 | { xprintf("Write error on `%s' - %s\n", fname, xerrmsg()); |
---|
1391 | ret = 1; |
---|
1392 | goto done; |
---|
1393 | } |
---|
1394 | /* problem data has been successfully written */ |
---|
1395 | xprintf("%d records were written\n", recno); |
---|
1396 | ret = 0; |
---|
1397 | done: if (fp != NULL) xfclose(fp); |
---|
1398 | return ret; |
---|
1399 | } |
---|
1400 | |
---|
1401 | /* eof */ |
---|