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#include <gfsm.h>
guint32 grand_seed = 42;
const char *probfile = "tagh-probs.bin";
extern gulong count_test;
GArray *seekus = NULL; /*-- lab = g_array_index(seekus,i); 1<=i<=count_test --*/
typedef struct {
gfsmLabelId lab;
double prob;
} seekProb;
GArray *labp=NULL; /*-- g_array_index(probs,seekProb,i) = (lab,p(lab)) --*/
GRand *grand=NULL;
/*======================================================================
* load_label_probs()
*/
void load_label_probs(void) {
seekProb sp;
double total=0, tmp;
FILE *f = fopen(probfile,"r");
if (!f) {
fprintf(stderr, "error: open failed for probability file '%s'\n", probfile);
exit(1);
}
labp = g_array_sized_new(FALSE,TRUE,sizeof(seekProb),256);
labp->len = 0;
while ( !feof(f) ) {
if (fread(&(sp.lab), sizeof(gfsmLabelId), 1, f) != 1
|| fread(&(sp.prob), sizeof(double), 1, f) != 1)
{
break;
}
tmp = sp.prob;
sp.prob += total;
total += tmp;
g_array_append_val(labp,sp);
}
fclose(f);
fprintf(stderr, "[info]: read probability distribution over %d labels from '%s'\n",
labp->len, probfile);
}
/*======================================================================
* random_label()
*/
gfsmLabelId random_label(void) {
double w;
int i;
if (!grand) { grand = g_rand_new_with_seed(grand_seed); }
w = g_rand_double(grand);
for (i=0; i < labp->len && w > g_array_index(labp,seekProb,i).prob; i++) { ; }
if (i==labp->len) { --i; }
return g_array_index(labp,seekProb,i).lab;
}
/*======================================================================
* populate_seek_labels()
*/
void populate_seek_labels(void) {
int i;
gfsmLabelId lab;
seekus = g_array_sized_new(FALSE,TRUE,sizeof(gfsmLabelId),count_test);
for (i=0; i < count_test; i++) {
lab = random_label();
g_array_append_val(seekus,lab);
}
}
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