lily/moment.cc

   1 /*
   2   moment.cc --  implement Moment
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10
  11 #include "lily-guile.hh"
  12 #include "moment.hh"
  13 #include "warn.hh"
  14
  15 SCM
  16 Moment::mark_smob (SCM)
  17 {
  18   return SCM_EOL;
  19 }
  20
  21
  22 Moment::~Moment()
  23 {
  24   self_scm_ = SCM_EOL;
  25 }
  26
  27 int
  28 Moment::print_smob (SCM s, SCM port, scm_print_state *)
  29 {
  30   Moment  *r = (Moment *) gh_cdr (s);
  31
  32   scm_puts ("#<Mom ", port);
  33   String str(r->str());
  34   scm_puts ((char *)str.ch_C(), port);
  35   scm_puts (" >", port);
  36
  37   return 1;
  38 }
  39
  40 void
  41 Moment::do_smobify_self ()
  42 {
  43 }
  44
  45 SCM
  46 make_rational (SCM n, SCM d)
  47 {
  48   Moment *r;
  49   SCM retval = SCM_EOL;
  50   if (SCM_INUMP (n) && SCM_INUMP(d))
  51     {
  52       r= new Moment (gh_scm2int (n), gh_scm2int (d));
  53     }
  54   else
  55     {
  56       ::error ("make-moment takes two integer arguments.");
  57       r = new Moment (1,1);
  58     }
  59
  60   retval = r->smobify_self ();
  61   scm_unprotect_object (r->self_scm_);
  62   return retval ;
  63 }
  64
  65 #include "ly-smobs.icc"
  66
  67 IMPLEMENT_SMOBS(Moment);
  68
  69 void
  70 init_moments ()
  71 {
  72   scm_make_gsubr ("make-moment", 2 , 0, 0,  (SCM(*)(...)) make_rational);
  73 }
  74
  75 ADD_SCM_INIT_FUNC(moms,init_moments);
  76
  77 SCM
  78 Moment::equal_p (SCM a, SCM b)
  79 {
  80   Moment *m1 = SMOB_TO_TYPE(Moment, a);
  81   Moment *m2 = SMOB_TO_TYPE(Moment, b);
  82
  83   return (*m1 == *m2) ? SCM_BOOL_T : SCM_BOOL_F;
  84 }