slevmar_bleic_der(): single precision, box, linear equation & inequality constraints, analytic Jacobian
slevmar_bleic_dif(): single precision, box, linear equation & inequality constraints, finite difference approximated Jacobian
Convenience wrappers xlevmar_blic_der()/xlevmar_blic_dif(), xlevmar_leic_der()/xlevmar_leic_dif() &xlevmar_lic_der()/xlevmar_lic_dif() to xlevmar_bleic_der()/xlevmar_bleic_dif() are also provided.