6.3. C

C does not support object-oriented-programming. However, an object based approach is applied. All functions apply the prefix naming convention swd_api_*. The API is defined in the header file spectral_wave_data.h.

The data types real_swd, vector_swd, vector_2nd_phi_swd and vector_2nd_elev_swd are also defined in the C-header file.

If your application apply float (not double) for the SWD-API you need to:

1. Set the macro SWD_API_FLOAT before the header file is included.

2. The fortran library should be compiled with kind_swd_c = c_float in the file kind_values.f90.

By default it is assumed that the C-interface apply double. Hence kind_swd_c = c_double in the file kind_values.f90 and the macro SWD_API_FLOAT should be unset.

6.3.2. Implementation

In the current version the implementation of these functions are obtained from the fortran implementation using the standard ISO_C_BINDINGS defined in spectral_wave_data_c.f90.