lily/prob-scheme.cc

   1 /*
   2   paper-system-scheme.cc -- implement Prob bindings
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2005--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "prob.hh"
  10
  11 LY_DEFINE (ly_prob_set_property_x, "ly:prob-set-property!",
  12            2, 1, 0, (SCM obj, SCM sym, SCM value),
  13            "Set property @var{sym} of @var{obj} to @var{value}.")
  14 {
  15   LY_ASSERT_SMOB (Prob, obj, 1);
  16   Prob *ps = unsmob_prob (obj);
  17   LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
  18
  19   ps->set_property (sym, value);
  20   return SCM_UNSPECIFIED;
  21 }
  22
  23 /*
  24   Hmm, this is not orthogonal.
  25 */
  26 LY_DEFINE (ly_prob_property_p, "ly:prob-property?",
  27            2, 1, 0, (SCM obj, SCM sym),
  28            "Is boolean prop @var{sym} set?")
  29 {
  30   return scm_equal_p (SCM_BOOL_T, ly_prob_property (obj, sym, SCM_BOOL_F));
  31 }
  32
  33 LY_DEFINE (ly_prob_property, "ly:prob-property",
  34            2, 1, 0, (SCM obj, SCM sym, SCM dfault),
  35            "Return the value for @var{sym}.")
  36 {
  37   LY_ASSERT_SMOB (Prob, obj, 1);
  38   Prob *ps = unsmob_prob (obj);
  39   LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
  40
  41   if (dfault == SCM_UNDEFINED)
  42     dfault = SCM_EOL;
  43
  44   SCM retval = ps->internal_get_property (sym);
  45   if (retval == SCM_EOL)
  46     return dfault;
  47   else
  48     return retval;
  49 }
  50
  51 LY_DEFINE (ly_prob_type_p, "ly:prob-type?",
  52            2, 0, 0,
  53            (SCM obj, SCM type),
  54            "Is @var{obj} the specified prob-type?")
  55 {
  56   Prob*prob = unsmob_prob (obj);
  57   return scm_from_bool (prob && prob->type () == type);
  58 }
  59
  60 LY_DEFINE (ly_make_prob, "ly:make-prob",
  61            2, 0, 1,
  62            (SCM type, SCM init, SCM rest),
  63            "Create a @code{Prob} object.")
  64 {
  65   Prob *pr = new Prob (type, init);
  66
  67   for (SCM s = rest;
  68        scm_is_pair (s) && scm_is_pair (scm_cdr (s)); s = scm_cddr (s))
  69     {
  70       SCM sym = scm_car (s);
  71       SCM val = scm_cadr (s);
  72
  73       pr->set_property (sym, val);
  74     }
  75
  76   return pr->unprotect ();
  77 }
  78
  79
  80 LY_DEFINE (ly_prob_mutable_properties, "ly:prob-mutable-properties",
  81            1, 0, 0,
  82            (SCM prob),
  83            "Retrieve an alist of mutable properties.")
  84 {
  85   LY_ASSERT_SMOB (Prob, prob, 1);
  86   Prob *ps = unsmob_prob (prob);
  87   return ps->get_property_alist (true);
  88 }
  89
  90 LY_DEFINE (ly_prob_immutable_properties, "ly:prob-immutable-properties",
  91            1, 0, 0,
  92            (SCM prob),
  93            "Retrieve an alist of mutable properties.")
  94 {
  95   LY_ASSERT_SMOB (Prob, prob, 1);
  96   Prob *ps = unsmob_prob (prob);
  97   return ps->get_property_alist (false);
  98 }
  99