23 #ifndef INCLUDED_GR_SQUASH_FF_H_
24 # define INCLUDED_GR_SQUASH_FF_H_
28 #include <gsl/gsl_errno.h>
29 #include <gsl/gsl_interp.h>
30 #include <gsl/gsl_spline.h>
41 const std::vector<float> &ogrid);
46 const std::vector<float> &ogrid);
54 gsl_interp_accel *d_accel;
58 const std::vector<float> &ogrid);
63 int work(
int noutput_items,