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[Bug-glpk] (no subject)
From: |
glpk xypron |
Subject: |
[Bug-glpk] (no subject) |
Date: |
Sun, 28 Feb 2010 10:46:55 +0100 |
Hello Andrew,
in the example below I have implemented a callback function.
For testing, please, provide the name of an MIP GMPL file
as only argument (e.g. examples/tsp.mod).
The problem name is set before entering glp_intopt.
glp_get_prob_name(glp_ios_get_prob(tree)) does not return
the problem name but null in the call back function.
Why does glp_prob_name(tree) not return the same
pointer as the one passed to glp_int_opt?
Please, change the code to provide the problem name
in the call back function.
Best regards
Xypron
#include <stdio.h>
#include "glpk.h"
/**
* Call back function for MIP solver
*/
void cb(glp_tree *tree, void *info) {
glp_prob *prob;
prob = glp_ios_get_prob(tree);
if (glp_ios_reason(tree) == GLP_IBINGO) {
printf("callback problem name = %s\n", glp_get_prob_name(prob));
}
}
int main(int argc, char **args) {
glp_prob *prob;
glp_tran *tran;
glp_iocp iocp;
int ret;
if (argc != 2) {
printf("usage:\ntest model.mod\n");
return 1;
}
prob = glp_create_prob();
tran = glp_mpl_alloc_wksp();
if (0 != glp_mpl_read_model(tran, args[1], 0)) {
glp_mpl_free_wksp(tran);
glp_delete_prob(prob);
printf("file not found %s", args[1]);
return 1;
}
glp_mpl_generate(tran, NULL);
glp_mpl_build_prob(tran, prob);
glp_init_iocp(&iocp);
iocp.presolve = GLP_ON;
iocp.cb_func = cb;
printf("problem name for intopt = %s\n", glp_get_prob_name(prob));
glp_intopt(prob, &iocp);
glp_mpl_postsolve(tran, prob, GLP_MIP);
glp_mpl_free_wksp(tran);
glp_delete_prob(prob);
return 0;
}
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- [Bug-glpk] (no subject),
glpk xypron <=