athos@1261
|
1 |
/* -*- C++ -*-
|
athos@1261
|
2 |
*
|
alpar@1956
|
3 |
* This file is a part of LEMON, a generic C++ optimization library
|
alpar@1956
|
4 |
*
|
alpar@1956
|
5 |
* Copyright (C) 2003-2006
|
alpar@1956
|
6 |
* Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
|
alpar@1359
|
7 |
* (Egervary Research Group on Combinatorial Optimization, EGRES).
|
athos@1261
|
8 |
*
|
athos@1261
|
9 |
* Permission to use, modify and distribute this software is granted
|
athos@1261
|
10 |
* provided that this copyright notice appears in all copies. For
|
athos@1261
|
11 |
* precise terms see the accompanying LICENSE file.
|
athos@1261
|
12 |
*
|
athos@1261
|
13 |
* This software is provided "AS IS" with no warranty of any kind,
|
athos@1261
|
14 |
* express or implied, and with no claim as to its suitability for any
|
athos@1261
|
15 |
* purpose.
|
athos@1261
|
16 |
*
|
athos@1261
|
17 |
*/
|
athos@1261
|
18 |
|
athos@1261
|
19 |
///\file
|
athos@1261
|
20 |
///\brief Implementation of the LEMON-GLPK lp solver interface.
|
athos@1261
|
21 |
|
ladanyi@1305
|
22 |
#include <lemon/lp_glpk.h>
|
athos@1473
|
23 |
//#include <iostream>
|
athos@1261
|
24 |
namespace lemon {
|
athos@1261
|
25 |
|
alpar@1364
|
26 |
|
alpar@1321
|
27 |
LpGlpk::LpGlpk() : Parent(),
|
alpar@1321
|
28 |
lp(lpx_create_prob()) {
|
alpar@1321
|
29 |
///\todo constrol function for this:
|
alpar@1321
|
30 |
lpx_set_int_parm(lp, LPX_K_DUAL, 1);
|
alpar@1321
|
31 |
messageLevel(0);
|
alpar@1321
|
32 |
}
|
alpar@1321
|
33 |
|
alpar@2321
|
34 |
LpGlpk::LpGlpk(const LpGlpk &glp) : Parent(glp),
|
alpar@2321
|
35 |
lp(lpx_create_prob()) {
|
alpar@2321
|
36 |
///\todo constrol function for this:
|
alpar@2321
|
37 |
lpx_set_int_parm(lp, LPX_K_DUAL, 1);
|
alpar@2321
|
38 |
messageLevel(0);
|
alpar@2321
|
39 |
//Coefficient matrix, row bounds
|
alpar@2321
|
40 |
lpx_add_rows(lp, lpx_get_num_rows(glp.lp));
|
alpar@2321
|
41 |
lpx_add_cols(lp, lpx_get_num_cols(glp.lp));
|
alpar@2321
|
42 |
int len;
|
alpar@2321
|
43 |
int ind[1+lpx_get_num_cols(glp.lp)];
|
alpar@2321
|
44 |
Value val[1+lpx_get_num_cols(glp.lp)];
|
alpar@2321
|
45 |
for (int i=1;i<=lpx_get_num_rows(glp.lp);++i)
|
alpar@2321
|
46 |
{
|
alpar@2321
|
47 |
len=lpx_get_mat_row(glp.lp,i,ind,val);
|
alpar@2321
|
48 |
lpx_set_mat_row(lp, i,len,ind,val);
|
alpar@2321
|
49 |
lpx_set_row_bnds(lp,i,lpx_get_row_type(glp.lp,i),
|
alpar@2321
|
50 |
lpx_get_row_lb(glp.lp,i),lpx_get_row_ub(glp.lp,i));
|
alpar@2321
|
51 |
}
|
alpar@2321
|
52 |
|
alpar@2321
|
53 |
//Objective function, coloumn bounds
|
alpar@2321
|
54 |
lpx_set_obj_dir(lp, lpx_get_obj_dir(glp.lp));
|
alpar@2321
|
55 |
//Objectif function's constant term treated separately
|
alpar@2321
|
56 |
lpx_set_obj_coef(lp,0,lpx_get_obj_coef(glp.lp,0));
|
alpar@2321
|
57 |
for (int i=1;i<=lpx_get_num_cols(glp.lp);++i)
|
alpar@2321
|
58 |
{
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alpar@2321
|
59 |
lpx_set_obj_coef(lp,i,lpx_get_obj_coef(glp.lp,i));
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alpar@2321
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60 |
lpx_set_col_bnds(lp,i,lpx_get_col_type(glp.lp,i),
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alpar@2321
|
61 |
lpx_get_col_lb(glp.lp,i),lpx_get_col_ub(glp.lp,i));
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alpar@2321
|
62 |
}
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alpar@2321
|
63 |
}
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alpar@2321
|
64 |
|
alpar@1321
|
65 |
LpGlpk::~LpGlpk() {
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alpar@1321
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66 |
lpx_delete_prob(lp);
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alpar@1321
|
67 |
}
|
alpar@1321
|
68 |
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alpar@1321
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69 |
int LpGlpk::_addCol() {
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alpar@1321
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70 |
int i=lpx_add_cols(lp, 1);
|
alpar@1321
|
71 |
_setColLowerBound(i, -INF);
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alpar@1321
|
72 |
_setColUpperBound(i, INF);
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alpar@1321
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73 |
return i;
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alpar@1321
|
74 |
}
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alpar@1321
|
75 |
|
athos@1436
|
76 |
///\e
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athos@1436
|
77 |
|
athos@1436
|
78 |
|
athos@1436
|
79 |
LpSolverBase &LpGlpk::_newLp()
|
athos@1436
|
80 |
{
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alpar@2321
|
81 |
LpGlpk* newlp=new LpGlpk;
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athos@1436
|
82 |
return *newlp;
|
athos@1436
|
83 |
}
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athos@1436
|
84 |
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athos@1436
|
85 |
///\e
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athos@1436
|
86 |
|
athos@1436
|
87 |
LpSolverBase &LpGlpk::_copyLp()
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athos@1436
|
88 |
{
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alpar@2321
|
89 |
LpGlpk* newlp=new LpGlpk(*this);
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athos@1436
|
90 |
return *newlp;
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athos@1436
|
91 |
}
|
athos@1436
|
92 |
|
alpar@1321
|
93 |
int LpGlpk::_addRow() {
|
alpar@1321
|
94 |
int i=lpx_add_rows(lp, 1);
|
alpar@1321
|
95 |
return i;
|
alpar@1321
|
96 |
}
|
alpar@1321
|
97 |
|
alpar@1321
|
98 |
|
athos@1432
|
99 |
void LpGlpk::_eraseCol(int i) {
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athos@1432
|
100 |
int cols[2];
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athos@1432
|
101 |
cols[1]=i;
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athos@1432
|
102 |
lpx_del_cols(lp, 1, cols);
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athos@1432
|
103 |
}
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athos@1432
|
104 |
|
athos@1432
|
105 |
void LpGlpk::_eraseRow(int i) {
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athos@1432
|
106 |
int rows[2];
|
athos@1432
|
107 |
rows[1]=i;
|
athos@1432
|
108 |
lpx_del_rows(lp, 1, rows);
|
athos@1432
|
109 |
}
|
athos@1432
|
110 |
|
alpar@1895
|
111 |
void LpGlpk::_getColName(int col, std::string & name)
|
alpar@1895
|
112 |
{
|
alpar@1895
|
113 |
|
alpar@1895
|
114 |
char *n = lpx_get_col_name(lp,col);
|
alpar@1895
|
115 |
name = n?n:"";
|
alpar@1895
|
116 |
}
|
alpar@1895
|
117 |
|
alpar@1895
|
118 |
|
alpar@1895
|
119 |
void LpGlpk::_setColName(int col, const std::string & name)
|
alpar@1895
|
120 |
{
|
alpar@1895
|
121 |
lpx_set_col_name(lp,col,const_cast<char*>(name.c_str()));
|
athos@2349
|
122 |
|
alpar@1895
|
123 |
}
|
alpar@1895
|
124 |
|
deba@2312
|
125 |
void LpGlpk::_setRowCoeffs(int i, LpRowIterator b, LpRowIterator e)
|
alpar@1321
|
126 |
{
|
deba@2312
|
127 |
std::vector<int> indices;
|
deba@2312
|
128 |
std::vector<Value> values;
|
deba@2312
|
129 |
|
deba@2312
|
130 |
indices.push_back(0);
|
deba@2312
|
131 |
values.push_back(0);
|
deba@2312
|
132 |
|
deba@2312
|
133 |
for(LpRowIterator it=b; it!=e; ++it) {
|
deba@2312
|
134 |
indices.push_back(it->first);
|
deba@2312
|
135 |
values.push_back(it->second);
|
deba@2312
|
136 |
}
|
deba@2312
|
137 |
|
deba@2312
|
138 |
lpx_set_mat_row(lp, i, values.size() - 1, &indices[0], &values[0]);
|
alpar@1321
|
139 |
}
|
alpar@1321
|
140 |
|
deba@2312
|
141 |
void LpGlpk::_setColCoeffs(int i, LpColIterator b, LpColIterator e) {
|
deba@2312
|
142 |
|
deba@2312
|
143 |
std::vector<int> indices;
|
deba@2312
|
144 |
std::vector<Value> values;
|
deba@2312
|
145 |
|
deba@2312
|
146 |
indices.push_back(0);
|
deba@2312
|
147 |
values.push_back(0);
|
deba@2312
|
148 |
|
deba@2312
|
149 |
for(LpColIterator it=b; it!=e; ++it) {
|
deba@2312
|
150 |
indices.push_back(it->first);
|
deba@2312
|
151 |
values.push_back(it->second);
|
deba@2312
|
152 |
}
|
deba@2312
|
153 |
|
deba@2312
|
154 |
lpx_set_mat_col(lp, i, values.size() - 1, &indices[0], &values[0]);
|
alpar@1321
|
155 |
}
|
athos@1431
|
156 |
|
athos@1431
|
157 |
|
athos@1431
|
158 |
void LpGlpk::_setCoeff(int row, int col, Value value)
|
athos@1431
|
159 |
{
|
deba@2312
|
160 |
|
deba@2312
|
161 |
if (lpx_get_num_cols(lp) < lpx_get_num_rows(lp)) {
|
deba@2312
|
162 |
|
deba@2312
|
163 |
int length=lpx_get_mat_row(lp, row, 0, 0);
|
deba@2312
|
164 |
|
deba@2312
|
165 |
std::vector<int> indices(length + 2);
|
deba@2312
|
166 |
std::vector<Value> values(length + 2);
|
deba@2312
|
167 |
|
deba@2312
|
168 |
lpx_get_mat_row(lp, row, &indices[0], &values[0]);
|
deba@2312
|
169 |
|
deba@2312
|
170 |
//The following code does not suppose that the elements of the
|
deba@2312
|
171 |
//array indices are sorted
|
deba@2312
|
172 |
bool found=false;
|
deba@2312
|
173 |
for (int i = 1; i <= length; ++i) {
|
deba@2312
|
174 |
if (indices[i]==col){
|
deba@2312
|
175 |
found=true;
|
deba@2312
|
176 |
values[i]=value;
|
deba@2312
|
177 |
break;
|
deba@2312
|
178 |
}
|
deba@2312
|
179 |
}
|
deba@2312
|
180 |
if (!found){
|
deba@2312
|
181 |
++length;
|
deba@2312
|
182 |
indices[length]=col;
|
deba@2312
|
183 |
values[length]=value;
|
deba@2312
|
184 |
}
|
athos@1431
|
185 |
|
deba@2312
|
186 |
lpx_set_mat_row(lp, row, length, &indices[0], &values[0]);
|
deba@2312
|
187 |
|
deba@2312
|
188 |
} else {
|
deba@2312
|
189 |
|
deba@2312
|
190 |
int length=lpx_get_mat_col(lp, col, 0, 0);
|
deba@2312
|
191 |
|
deba@2312
|
192 |
std::vector<int> indices(length + 2);
|
deba@2312
|
193 |
std::vector<Value> values(length + 2);
|
deba@2312
|
194 |
|
deba@2312
|
195 |
lpx_get_mat_col(lp, col, &indices[0], &values[0]);
|
deba@2312
|
196 |
|
deba@2312
|
197 |
//The following code does not suppose that the elements of the
|
deba@2312
|
198 |
//array indices are sorted
|
deba@2312
|
199 |
bool found=false;
|
deba@2312
|
200 |
for (int i = 1; i <= length; ++i) {
|
deba@2312
|
201 |
if (indices[i]==col){
|
deba@2312
|
202 |
found=true;
|
deba@2312
|
203 |
values[i]=value;
|
deba@2312
|
204 |
break;
|
deba@2312
|
205 |
}
|
deba@2312
|
206 |
}
|
deba@2312
|
207 |
if (!found){
|
deba@2312
|
208 |
++length;
|
deba@2312
|
209 |
indices[length]=row;
|
deba@2312
|
210 |
values[length]=value;
|
deba@2312
|
211 |
}
|
athos@1431
|
212 |
|
deba@2312
|
213 |
lpx_set_mat_col(lp, col, length, &indices[0], &values[0]);
|
athos@1431
|
214 |
}
|
athos@1431
|
215 |
}
|
athos@1431
|
216 |
|
athos@2328
|
217 |
LpGlpk::Value LpGlpk::_getCoeff(int row, int col)
|
athos@2324
|
218 |
{
|
athos@2328
|
219 |
|
athos@2328
|
220 |
int length=lpx_get_mat_row(lp, row, 0, 0);
|
athos@2328
|
221 |
|
athos@2328
|
222 |
std::vector<int> indices(length + 2);
|
athos@2328
|
223 |
std::vector<Value> values(length + 2);
|
athos@2328
|
224 |
|
athos@2328
|
225 |
lpx_get_mat_row(lp, row, &indices[0], &values[0]);
|
athos@2328
|
226 |
|
athos@2328
|
227 |
//The following code does not suppose that the elements of the
|
athos@2328
|
228 |
//array indices are sorted
|
athos@2328
|
229 |
for (int i = 1; i <= length; ++i) {
|
athos@2328
|
230 |
if (indices[i]==col){
|
athos@2328
|
231 |
return values[i];
|
athos@2328
|
232 |
}
|
athos@2328
|
233 |
}
|
athos@2324
|
234 |
return 0;
|
athos@2328
|
235 |
|
athos@2324
|
236 |
}
|
athos@2324
|
237 |
|
athos@2324
|
238 |
|
alpar@1321
|
239 |
void LpGlpk::_setColLowerBound(int i, Value lo)
|
alpar@1321
|
240 |
{
|
alpar@1321
|
241 |
if (lo==INF) {
|
alpar@1321
|
242 |
//FIXME error
|
alpar@1321
|
243 |
}
|
alpar@1321
|
244 |
int b=lpx_get_col_type(lp, i);
|
alpar@1321
|
245 |
double up=lpx_get_col_ub(lp, i);
|
alpar@1321
|
246 |
if (lo==-INF) {
|
alpar@1321
|
247 |
switch (b) {
|
alpar@1321
|
248 |
case LPX_FR:
|
alpar@1321
|
249 |
case LPX_LO:
|
alpar@1321
|
250 |
lpx_set_col_bnds(lp, i, LPX_FR, lo, up);
|
alpar@1321
|
251 |
break;
|
alpar@1321
|
252 |
case LPX_UP:
|
alpar@1321
|
253 |
break;
|
alpar@1321
|
254 |
case LPX_DB:
|
alpar@1321
|
255 |
case LPX_FX:
|
alpar@1321
|
256 |
lpx_set_col_bnds(lp, i, LPX_UP, lo, up);
|
alpar@1321
|
257 |
break;
|
alpar@1321
|
258 |
default: ;
|
alpar@1321
|
259 |
//FIXME error
|
alpar@1321
|
260 |
}
|
alpar@1321
|
261 |
} else {
|
alpar@1321
|
262 |
switch (b) {
|
alpar@1321
|
263 |
case LPX_FR:
|
alpar@1321
|
264 |
case LPX_LO:
|
alpar@1321
|
265 |
lpx_set_col_bnds(lp, i, LPX_LO, lo, up);
|
alpar@1321
|
266 |
break;
|
alpar@1321
|
267 |
case LPX_UP:
|
alpar@1321
|
268 |
case LPX_DB:
|
alpar@1321
|
269 |
case LPX_FX:
|
alpar@1321
|
270 |
if (lo==up)
|
alpar@1321
|
271 |
lpx_set_col_bnds(lp, i, LPX_FX, lo, up);
|
alpar@1321
|
272 |
else
|
alpar@1321
|
273 |
lpx_set_col_bnds(lp, i, LPX_DB, lo, up);
|
alpar@1321
|
274 |
break;
|
alpar@1321
|
275 |
default: ;
|
alpar@1321
|
276 |
//FIXME error
|
alpar@1321
|
277 |
}
|
athos@1261
|
278 |
}
|
athos@1261
|
279 |
|
alpar@1321
|
280 |
}
|
athos@2328
|
281 |
|
athos@2328
|
282 |
LpGlpk::Value LpGlpk::_getColLowerBound(int i)
|
athos@2328
|
283 |
{
|
athos@2328
|
284 |
int b=lpx_get_col_type(lp, i);
|
athos@2328
|
285 |
switch (b) {
|
athos@2328
|
286 |
case LPX_LO:
|
athos@2328
|
287 |
case LPX_DB:
|
athos@2328
|
288 |
case LPX_FX:
|
athos@2328
|
289 |
return lpx_get_col_lb(lp, i);
|
athos@2328
|
290 |
default: ;
|
athos@2328
|
291 |
return -INF;
|
athos@2328
|
292 |
}
|
athos@2328
|
293 |
}
|
alpar@1321
|
294 |
|
alpar@1321
|
295 |
void LpGlpk::_setColUpperBound(int i, Value up)
|
alpar@1321
|
296 |
{
|
alpar@1321
|
297 |
if (up==-INF) {
|
alpar@1321
|
298 |
//FIXME error
|
athos@1261
|
299 |
}
|
alpar@1321
|
300 |
int b=lpx_get_col_type(lp, i);
|
alpar@1321
|
301 |
double lo=lpx_get_col_lb(lp, i);
|
alpar@1321
|
302 |
if (up==INF) {
|
alpar@1321
|
303 |
switch (b) {
|
alpar@1321
|
304 |
case LPX_FR:
|
alpar@1321
|
305 |
case LPX_LO:
|
alpar@1321
|
306 |
break;
|
alpar@1321
|
307 |
case LPX_UP:
|
alpar@1321
|
308 |
lpx_set_col_bnds(lp, i, LPX_FR, lo, up);
|
alpar@1321
|
309 |
break;
|
alpar@1321
|
310 |
case LPX_DB:
|
alpar@1321
|
311 |
case LPX_FX:
|
alpar@1321
|
312 |
lpx_set_col_bnds(lp, i, LPX_LO, lo, up);
|
alpar@1321
|
313 |
break;
|
alpar@1321
|
314 |
default: ;
|
athos@1261
|
315 |
//FIXME error
|
athos@1261
|
316 |
}
|
alpar@1321
|
317 |
} else {
|
alpar@1321
|
318 |
switch (b) {
|
alpar@1321
|
319 |
case LPX_FR:
|
alpar@1321
|
320 |
lpx_set_col_bnds(lp, i, LPX_UP, lo, up);
|
alpar@1321
|
321 |
break;
|
alpar@1321
|
322 |
case LPX_UP:
|
alpar@1321
|
323 |
lpx_set_col_bnds(lp, i, LPX_UP, lo, up);
|
alpar@1321
|
324 |
break;
|
alpar@1321
|
325 |
case LPX_LO:
|
alpar@1321
|
326 |
case LPX_DB:
|
alpar@1321
|
327 |
case LPX_FX:
|
alpar@1321
|
328 |
if (lo==up)
|
alpar@1321
|
329 |
lpx_set_col_bnds(lp, i, LPX_FX, lo, up);
|
alpar@1321
|
330 |
else
|
alpar@1321
|
331 |
lpx_set_col_bnds(lp, i, LPX_DB, lo, up);
|
alpar@1321
|
332 |
break;
|
alpar@1321
|
333 |
default: ;
|
athos@1261
|
334 |
//FIXME error
|
athos@1261
|
335 |
}
|
alpar@1321
|
336 |
}
|
alpar@1321
|
337 |
}
|
athos@2328
|
338 |
|
athos@2328
|
339 |
LpGlpk::Value LpGlpk::_getColUpperBound(int i)
|
athos@2328
|
340 |
{
|
athos@2328
|
341 |
int b=lpx_get_col_type(lp, i);
|
athos@2328
|
342 |
switch (b) {
|
athos@2328
|
343 |
case LPX_UP:
|
athos@2328
|
344 |
case LPX_DB:
|
athos@2328
|
345 |
case LPX_FX:
|
athos@2328
|
346 |
return lpx_get_col_ub(lp, i);
|
athos@2328
|
347 |
default: ;
|
athos@2328
|
348 |
return INF;
|
athos@2328
|
349 |
}
|
athos@2328
|
350 |
}
|
alpar@1321
|
351 |
|
athos@1405
|
352 |
// void LpGlpk::_setRowLowerBound(int i, Value lo)
|
athos@1405
|
353 |
// {
|
athos@1405
|
354 |
// if (lo==INF) {
|
athos@1405
|
355 |
// //FIXME error
|
athos@1405
|
356 |
// }
|
athos@1405
|
357 |
// int b=lpx_get_row_type(lp, i);
|
athos@1405
|
358 |
// double up=lpx_get_row_ub(lp, i);
|
athos@1405
|
359 |
// if (lo==-INF) {
|
athos@1405
|
360 |
// switch (b) {
|
athos@1405
|
361 |
// case LPX_FR:
|
athos@1405
|
362 |
// case LPX_LO:
|
athos@1405
|
363 |
// lpx_set_row_bnds(lp, i, LPX_FR, lo, up);
|
athos@1405
|
364 |
// break;
|
athos@1405
|
365 |
// case LPX_UP:
|
athos@1405
|
366 |
// break;
|
athos@1405
|
367 |
// case LPX_DB:
|
athos@1405
|
368 |
// case LPX_FX:
|
athos@1405
|
369 |
// lpx_set_row_bnds(lp, i, LPX_UP, lo, up);
|
athos@1405
|
370 |
// break;
|
athos@1405
|
371 |
// default: ;
|
athos@1405
|
372 |
// //FIXME error
|
athos@1405
|
373 |
// }
|
athos@1405
|
374 |
// } else {
|
athos@1405
|
375 |
// switch (b) {
|
athos@1405
|
376 |
// case LPX_FR:
|
athos@1405
|
377 |
// case LPX_LO:
|
athos@1405
|
378 |
// lpx_set_row_bnds(lp, i, LPX_LO, lo, up);
|
athos@1405
|
379 |
// break;
|
athos@1405
|
380 |
// case LPX_UP:
|
athos@1405
|
381 |
// case LPX_DB:
|
athos@1405
|
382 |
// case LPX_FX:
|
athos@1405
|
383 |
// if (lo==up)
|
athos@1405
|
384 |
// lpx_set_row_bnds(lp, i, LPX_FX, lo, up);
|
athos@1405
|
385 |
// else
|
athos@1405
|
386 |
// lpx_set_row_bnds(lp, i, LPX_DB, lo, up);
|
athos@1405
|
387 |
// break;
|
athos@1405
|
388 |
// default: ;
|
athos@1405
|
389 |
// //FIXME error
|
athos@1405
|
390 |
// }
|
athos@1405
|
391 |
// }
|
athos@1405
|
392 |
// }
|
athos@1261
|
393 |
|
athos@1405
|
394 |
// void LpGlpk::_setRowUpperBound(int i, Value up)
|
athos@1405
|
395 |
// {
|
athos@1405
|
396 |
// if (up==-INF) {
|
athos@1405
|
397 |
// //FIXME error
|
athos@1405
|
398 |
// }
|
athos@1405
|
399 |
// int b=lpx_get_row_type(lp, i);
|
athos@1405
|
400 |
// double lo=lpx_get_row_lb(lp, i);
|
athos@1405
|
401 |
// if (up==INF) {
|
athos@1405
|
402 |
// switch (b) {
|
athos@1405
|
403 |
// case LPX_FR:
|
athos@1405
|
404 |
// case LPX_LO:
|
athos@1405
|
405 |
// break;
|
athos@1405
|
406 |
// case LPX_UP:
|
athos@1405
|
407 |
// lpx_set_row_bnds(lp, i, LPX_FR, lo, up);
|
athos@1405
|
408 |
// break;
|
athos@1405
|
409 |
// case LPX_DB:
|
athos@1405
|
410 |
// case LPX_FX:
|
athos@1405
|
411 |
// lpx_set_row_bnds(lp, i, LPX_LO, lo, up);
|
athos@1405
|
412 |
// break;
|
athos@1405
|
413 |
// default: ;
|
athos@1405
|
414 |
// //FIXME error
|
athos@1405
|
415 |
// }
|
athos@1405
|
416 |
// } else {
|
athos@1405
|
417 |
// switch (b) {
|
athos@1405
|
418 |
// case LPX_FR:
|
athos@1405
|
419 |
// lpx_set_row_bnds(lp, i, LPX_UP, lo, up);
|
athos@1405
|
420 |
// break;
|
athos@1405
|
421 |
// case LPX_UP:
|
athos@1405
|
422 |
// lpx_set_row_bnds(lp, i, LPX_UP, lo, up);
|
athos@1405
|
423 |
// break;
|
athos@1405
|
424 |
// case LPX_LO:
|
athos@1405
|
425 |
// case LPX_DB:
|
athos@1405
|
426 |
// case LPX_FX:
|
athos@1405
|
427 |
// if (lo==up)
|
athos@1405
|
428 |
// lpx_set_row_bnds(lp, i, LPX_FX, lo, up);
|
athos@1405
|
429 |
// else
|
athos@1405
|
430 |
// lpx_set_row_bnds(lp, i, LPX_DB, lo, up);
|
athos@1405
|
431 |
// break;
|
athos@1405
|
432 |
// default: ;
|
athos@1405
|
433 |
// //FIXME error
|
athos@1405
|
434 |
// }
|
athos@1405
|
435 |
// }
|
athos@1405
|
436 |
// }
|
athos@1379
|
437 |
|
athos@1379
|
438 |
void LpGlpk::_setRowBounds(int i, Value lb, Value ub)
|
athos@1379
|
439 |
{
|
athos@1379
|
440 |
//Bad parameter
|
athos@1379
|
441 |
if (lb==INF || ub==-INF) {
|
athos@1379
|
442 |
//FIXME error
|
athos@1379
|
443 |
}
|
athos@1379
|
444 |
|
athos@1379
|
445 |
if (lb == -INF){
|
athos@1379
|
446 |
if (ub == INF){
|
athos@1379
|
447 |
lpx_set_row_bnds(lp, i, LPX_FR, lb, ub);
|
athos@1379
|
448 |
}
|
athos@1379
|
449 |
else{
|
athos@1379
|
450 |
lpx_set_row_bnds(lp, i, LPX_UP, lb, ub);
|
athos@1379
|
451 |
}
|
athos@1379
|
452 |
}
|
athos@1379
|
453 |
else{
|
athos@1379
|
454 |
if (ub==INF){
|
athos@1379
|
455 |
lpx_set_row_bnds(lp, i, LPX_LO, lb, ub);
|
athos@1379
|
456 |
|
athos@1379
|
457 |
}
|
athos@1379
|
458 |
else{
|
athos@1379
|
459 |
if (lb == ub){
|
athos@1379
|
460 |
lpx_set_row_bnds(lp, i, LPX_FX, lb, ub);
|
athos@1379
|
461 |
}
|
athos@1379
|
462 |
else{
|
athos@1379
|
463 |
lpx_set_row_bnds(lp, i, LPX_DB, lb, ub);
|
athos@1379
|
464 |
}
|
athos@1379
|
465 |
}
|
athos@1379
|
466 |
}
|
athos@1379
|
467 |
|
athos@1379
|
468 |
}
|
athos@2328
|
469 |
|
athos@2328
|
470 |
void LpGlpk::_getRowBounds(int i, Value &lb, Value &ub)
|
athos@2328
|
471 |
{
|
athos@2328
|
472 |
|
athos@2328
|
473 |
int b=lpx_get_row_type(lp, i);
|
athos@2328
|
474 |
switch (b) {
|
athos@2328
|
475 |
case LPX_FR:
|
athos@2328
|
476 |
case LPX_UP:
|
athos@2328
|
477 |
lb = -INF;
|
athos@2328
|
478 |
break;
|
athos@2328
|
479 |
default:
|
athos@2328
|
480 |
lb=lpx_get_row_lb(lp, i);
|
athos@2328
|
481 |
}
|
athos@2328
|
482 |
|
athos@2328
|
483 |
switch (b) {
|
athos@2328
|
484 |
case LPX_FR:
|
athos@2328
|
485 |
case LPX_LO:
|
athos@2328
|
486 |
ub = INF;
|
athos@2328
|
487 |
break;
|
athos@2328
|
488 |
default:
|
athos@2328
|
489 |
ub=lpx_get_row_ub(lp, i);
|
athos@2328
|
490 |
}
|
athos@2328
|
491 |
|
athos@2328
|
492 |
}
|
athos@1261
|
493 |
|
athos@1298
|
494 |
void LpGlpk::_setObjCoeff(int i, Value obj_coef)
|
athos@1298
|
495 |
{
|
athos@1376
|
496 |
//i=0 means the constant term (shift)
|
athos@1298
|
497 |
lpx_set_obj_coef(lp, i, obj_coef);
|
athos@1298
|
498 |
}
|
athos@1261
|
499 |
|
athos@2324
|
500 |
LpGlpk::Value LpGlpk::_getObjCoeff(int i){
|
athos@2324
|
501 |
//i=0 means the constant term (shift)
|
athos@2324
|
502 |
return lpx_get_obj_coef(lp, i);
|
athos@2324
|
503 |
}
|
athos@2324
|
504 |
|
athos@1377
|
505 |
void LpGlpk::_clearObj()
|
athos@1376
|
506 |
{
|
athos@1377
|
507 |
for (int i=0;i<=lpx_get_num_cols(lp);++i){
|
athos@1377
|
508 |
lpx_set_obj_coef(lp, i, 0);
|
athos@1376
|
509 |
}
|
athos@1376
|
510 |
}
|
athos@1377
|
511 |
// void LpGlpk::_setObj(int length,
|
athos@1377
|
512 |
// int const * indices,
|
athos@1377
|
513 |
// Value const * values )
|
athos@1377
|
514 |
// {
|
athos@1377
|
515 |
// Value new_values[1+lpx_num_cols()];
|
athos@1377
|
516 |
// for (i=0;i<=lpx_num_cols();++i){
|
athos@1377
|
517 |
// new_values[i]=0;
|
athos@1377
|
518 |
// }
|
athos@1377
|
519 |
// for (i=1;i<=length;++i){
|
athos@1377
|
520 |
// new_values[indices[i]]=values[i];
|
athos@1377
|
521 |
// }
|
athos@1377
|
522 |
|
athos@1377
|
523 |
// for (i=0;i<=lpx_num_cols();++i){
|
athos@1377
|
524 |
// lpx_set_obj_coef(lp, i, new_values[i]);
|
athos@1377
|
525 |
// }
|
athos@1377
|
526 |
// }
|
alpar@1263
|
527 |
|
alpar@1303
|
528 |
LpGlpk::SolveExitStatus LpGlpk::_solve()
|
alpar@1263
|
529 |
{
|
athos@2345
|
530 |
// A way to check the problem to be solved
|
athos@2345
|
531 |
//lpx_write_cpxlp(lp,"naittvan.cpx");
|
athos@2345
|
532 |
|
athos@1458
|
533 |
int i = lpx_simplex(lp);
|
athos@1298
|
534 |
switch (i) {
|
athos@1298
|
535 |
case LPX_E_OK:
|
athos@1298
|
536 |
return SOLVED;
|
athos@1298
|
537 |
default:
|
athos@1298
|
538 |
return UNSOLVED;
|
athos@1298
|
539 |
}
|
alpar@1263
|
540 |
}
|
alpar@1263
|
541 |
|
alpar@1293
|
542 |
LpGlpk::Value LpGlpk::_getPrimal(int i)
|
alpar@1263
|
543 |
{
|
athos@1298
|
544 |
return lpx_get_col_prim(lp,i);
|
alpar@1263
|
545 |
}
|
marci@1787
|
546 |
|
marci@1787
|
547 |
LpGlpk::Value LpGlpk::_getDual(int i)
|
marci@1787
|
548 |
{
|
marci@1787
|
549 |
return lpx_get_row_dual(lp,i);
|
marci@1787
|
550 |
}
|
alpar@1263
|
551 |
|
alpar@1312
|
552 |
LpGlpk::Value LpGlpk::_getPrimalValue()
|
alpar@1312
|
553 |
{
|
athos@1314
|
554 |
return lpx_get_obj_val(lp);
|
alpar@1312
|
555 |
}
|
marci@1840
|
556 |
bool LpGlpk::_isBasicCol(int i) {
|
marci@1840
|
557 |
return (lpx_get_col_stat(lp, i)==LPX_BS);
|
marci@1840
|
558 |
}
|
alpar@1312
|
559 |
|
athos@1298
|
560 |
|
alpar@1312
|
561 |
LpGlpk::SolutionStatus LpGlpk::_getPrimalStatus()
|
alpar@1294
|
562 |
{
|
athos@1298
|
563 |
int stat= lpx_get_status(lp);
|
athos@1298
|
564 |
switch (stat) {
|
athos@1298
|
565 |
case LPX_UNDEF://Undefined (no solve has been run yet)
|
athos@1298
|
566 |
return UNDEFINED;
|
athos@1458
|
567 |
case LPX_NOFEAS://There is no feasible solution (primal, I guess)
|
athos@1458
|
568 |
case LPX_INFEAS://Infeasible
|
athos@1458
|
569 |
return INFEASIBLE;
|
athos@1458
|
570 |
case LPX_UNBND://Unbounded
|
athos@1458
|
571 |
return INFINITE;
|
athos@1458
|
572 |
case LPX_FEAS://Feasible
|
athos@1458
|
573 |
return FEASIBLE;
|
athos@1458
|
574 |
case LPX_OPT://Feasible
|
athos@1458
|
575 |
return OPTIMAL;
|
athos@1458
|
576 |
default:
|
athos@1458
|
577 |
return UNDEFINED; //to avoid gcc warning
|
athos@1458
|
578 |
//FIXME error
|
athos@1458
|
579 |
}
|
athos@1458
|
580 |
}
|
athos@1458
|
581 |
|
athos@1458
|
582 |
LpGlpk::SolutionStatus LpGlpk::_getDualStatus()
|
athos@1458
|
583 |
{
|
athos@1473
|
584 |
// std::cout<<"Itt megy: "<<lpx_get_dual_stat(lp)<<std::endl;
|
athos@1473
|
585 |
// std::cout<<"Itt a primal: "<<lpx_get_prim_stat(lp)<<std::endl;
|
athos@1473
|
586 |
|
alpar@1466
|
587 |
switch (lpx_get_dual_stat(lp)) {
|
athos@1458
|
588 |
case LPX_D_UNDEF://Undefined (no solve has been run yet)
|
athos@1458
|
589 |
return UNDEFINED;
|
athos@1540
|
590 |
case LPX_D_NOFEAS://There is no dual feasible solution
|
athos@1460
|
591 |
// case LPX_D_INFEAS://Infeasible
|
athos@1458
|
592 |
return INFEASIBLE;
|
athos@1473
|
593 |
case LPX_D_FEAS://Feasible
|
athos@1473
|
594 |
switch (lpx_get_status(lp)) {
|
athos@1473
|
595 |
case LPX_NOFEAS:
|
athos@1458
|
596 |
return INFINITE;
|
athos@1458
|
597 |
case LPX_OPT:
|
athos@1458
|
598 |
return OPTIMAL;
|
athos@1458
|
599 |
default:
|
athos@1458
|
600 |
return FEASIBLE;
|
athos@1458
|
601 |
}
|
athos@1458
|
602 |
default:
|
athos@1458
|
603 |
return UNDEFINED; //to avoid gcc warning
|
athos@1458
|
604 |
//FIXME error
|
athos@1458
|
605 |
}
|
athos@1458
|
606 |
}
|
athos@1458
|
607 |
|
athos@1463
|
608 |
LpGlpk::ProblemTypes LpGlpk::_getProblemType()
|
athos@1458
|
609 |
{
|
athos@1460
|
610 |
//int stat= lpx_get_status(lp);
|
athos@1458
|
611 |
int statp= lpx_get_prim_stat(lp);
|
athos@1458
|
612 |
int statd= lpx_get_dual_stat(lp);
|
athos@1464
|
613 |
if (statp==LPX_P_FEAS && statd==LPX_D_FEAS)
|
athos@1460
|
614 |
return PRIMAL_DUAL_FEASIBLE;
|
athos@1464
|
615 |
if (statp==LPX_P_FEAS && statd==LPX_D_NOFEAS)
|
athos@1460
|
616 |
return PRIMAL_FEASIBLE_DUAL_INFEASIBLE;
|
athos@1464
|
617 |
if (statp==LPX_P_NOFEAS && statd==LPX_D_FEAS)
|
athos@1460
|
618 |
return PRIMAL_INFEASIBLE_DUAL_FEASIBLE;
|
athos@1464
|
619 |
if (statp==LPX_P_NOFEAS && statd==LPX_D_NOFEAS)
|
athos@1460
|
620 |
return PRIMAL_DUAL_INFEASIBLE;
|
athos@1460
|
621 |
//In all other cases
|
athos@1460
|
622 |
return UNKNOWN;
|
alpar@1294
|
623 |
}
|
alpar@1263
|
624 |
|
alpar@1312
|
625 |
void LpGlpk::_setMax()
|
alpar@1312
|
626 |
{
|
alpar@1321
|
627 |
lpx_set_obj_dir(lp, LPX_MAX);
|
alpar@1321
|
628 |
}
|
alpar@1321
|
629 |
|
alpar@1312
|
630 |
void LpGlpk::_setMin()
|
alpar@1312
|
631 |
{
|
alpar@1321
|
632 |
lpx_set_obj_dir(lp, LPX_MIN);
|
alpar@1321
|
633 |
}
|
alpar@1321
|
634 |
|
athos@2324
|
635 |
bool LpGlpk::_isMax()
|
athos@2324
|
636 |
{
|
athos@2324
|
637 |
return (lpx_get_obj_dir(lp)==LPX_MAX);
|
athos@2324
|
638 |
}
|
athos@2324
|
639 |
|
alpar@1321
|
640 |
|
athos@2324
|
641 |
|
alpar@1321
|
642 |
void LpGlpk::messageLevel(int m)
|
alpar@1321
|
643 |
{
|
alpar@1321
|
644 |
lpx_set_int_parm(lp, LPX_K_MSGLEV, m);
|
alpar@1321
|
645 |
}
|
alpar@1312
|
646 |
|
alpar@1326
|
647 |
void LpGlpk::presolver(bool b)
|
alpar@1326
|
648 |
{
|
alpar@1326
|
649 |
lpx_set_int_parm(lp, LPX_K_PRESOL, b);
|
alpar@1326
|
650 |
}
|
alpar@1326
|
651 |
|
alpar@1312
|
652 |
|
athos@1261
|
653 |
} //END OF NAMESPACE LEMON
|