text: /* Copyright (c) 2002-2003 krzYszcz and others.
   * For information on usage and redistribution, and for a DISCLAIMER OF ALL
   * WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */
  
  #include <math.h>
  #include "m_pd.h"
  #include <common/api.h>
  
  
  typedef struct _atan {
      t_object x_obj;
      t_inlet *atan;
      t_outlet *x_outlet;
  } t_atan;
  
  void *atan_new(void);
  static t_int * atan_perform(t_int *w);
  static void atan_dsp(t_atan *x, t_signal **sp);
  
  static t_class *atan_class;
  
  static t_int *atan_perform(t_int *w)
  {
      int nblock = (int)(w[1]);
      t_float *in = (t_float *)(w[2]);
      t_float *out = (t_float *)(w[3]);
      while (nblock--)
      {
          float f = *in++;
          *out++ = atanf(f);  // CHECKED no protection against NaNs
      }
      return (w + 4);
  }
  
  static void atan_dsp(t_atan *x, t_signal **sp)
  {
      dsp_add(atan_perform, 3, sp[0]->s_n, sp[0]->s_vec, sp[1]->s_vec);
  }
  
  void *atan_new(void)
  {
      t_atan *x = (t_atan *)pd_new(atan_class);
      x->x_outlet = outlet_new(&x->x_obj, &s_signal);
      return (x);
  }
  
  CYCLONE_OBJ_API void atan_tilde_setup(void)
  {
      atan_class = class_new(gensym("atan~"), (t_newmethod)atan_new, 0,
                              sizeof(t_atan), CLASS_DEFAULT, 0);
      class_addmethod(atan_class, nullfn, gensym("signal"), 0);
      class_addmethod(atan_class, (t_method) atan_dsp, gensym("dsp"), A_CANT, 0);
  }
  