move base_poly_val typedef to interpolator_base

this way, rFFTW_interpolator no longer needs to include interpolator.
which will help with splitting the library.

bfps/cpp/interpolator.hpp

@@ -27,23 +27,12 @@
 #include "field_descriptor.hpp"
 #include "fftw_tools.hpp"
 #include "fluid_solver_base.hpp"
-#include "spline_n1.hpp"
-#include "spline_n2.hpp"
-#include "spline_n3.hpp"
-#include "spline_n4.hpp"
-#include "spline_n5.hpp"
-#include "spline_n6.hpp"
-#include "Lagrange_polys.hpp"
+#include "interpolator_base.hpp"
 
 #ifndef INTERPOLATOR
 
 #define INTERPOLATOR
 
-typedef void (*base_polynomial_values)(
-        const int derivative,
-        const double fraction,
-        double *__restrict__ destination);
-
 template <class rnumber, int interp_neighbours>
 class interpolator
 {

bfps/cpp/rFFTW_interpolator.hpp

@@ -27,14 +27,7 @@
 #include "field_descriptor.hpp"
 #include "fftw_tools.hpp"
 #include "fluid_solver_base.hpp"
-#include "spline_n1.hpp"
-#include "spline_n2.hpp"
-#include "spline_n3.hpp"
-#include "spline_n4.hpp"
-#include "spline_n5.hpp"
-#include "spline_n6.hpp"
-#include "Lagrange_polys.hpp"
-#include "interpolator.hpp"
+#include "interpolator_base.hpp"
 
 #ifndef RFFTW_INTERPOLATOR
 

setup.py

@@ -81,7 +81,10 @@ src_file_list = ['field_descriptor',
                  'spline_n6',
                  'Lagrange_polys']
 
-header_list = ['cpp/base.hpp'] + ['cpp/' + fname + '.hpp' for fname in src_file_list]
+header_list = (['cpp/base.hpp',
+                'cpp/interpolator_base.hpp'] +
+               ['cpp/' + fname + '.hpp'
+                for fname in src_file_list])
 
 with open('MANIFEST.in', 'w') as manifest_in_file:
     for fname in ['bfps/cpp/' + fname + '.cpp' for fname in src_file_list] + header_list: