Enumerate the list of terms contained in a linear constraint.

The value to be used as prev for the next call or NULL when all terms have been returned.

The following function displays the terms of a linear constraint.

void displinctr(XPRMcontext ctx, XPRMlinctr ctr)
{	
 void *prev;
 XPRMmpvar v;
 double coeff;
	
 prev=mm->getctrnextterm(ctx, ctr, NULL, &v, &coeff);
 mm->printf(ctx, "%g ",coeff);
 while(prev!=NULL) {
  prev=mm->getctrnextterm(ctx, ctr, prev, &v, &coeff);
  mm->printf(ctx, "%+g %p ", coeff, v);
 }
 mm->printf(ctx, "\n");
}

This function can be called repeatedly to enumerate all terms of a linear constraint. For the first call, the parameter prev must be NULL and the function returns the constant term of the linear constraint (the value returned for var is then NULL and coeff contains the constant term). For the following calls, the value of prev must be the last value returned by the function. The enumeration is completed when the function returns NULL.