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--2009 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 prob, SCM sym, SCM val),
  35            "Return the value for property @var{sym} of Prob object"
  36            " @var{prob}.  If no value is found, return @var{val} or"
  37            " @code{'()} if @var{val} is not specified.")
  38 {
  39   LY_ASSERT_SMOB (Prob, prob, 1);
  40   Prob *ps = unsmob_prob (prob);
  41   LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
  42
  43   if (val == SCM_UNDEFINED)
  44     val = SCM_EOL;
  45
  46   SCM retval = ps->internal_get_property (sym);
  47   if (retval == SCM_EOL)
  48     return val;
  49   else
  50     return retval;
  51 }
  52
  53 LY_DEFINE (ly_prob_type_p, "ly:prob-type?",
  54            2, 0, 0,
  55            (SCM obj, SCM type),
  56            "Is @var{obj} the specified prob-type?")
  57 {
  58   Prob*prob = unsmob_prob (obj);
  59   return scm_from_bool (prob && prob->type () == type);
  60 }
  61
  62 LY_DEFINE (ly_make_prob, "ly:make-prob",
  63            2, 0, 1,
  64            (SCM type, SCM init, SCM rest),
  65            "Create a @code{Prob} object.")
  66 {
  67   Prob *pr = new Prob (type, init);
  68
  69   for (SCM s = rest;
  70        scm_is_pair (s) && scm_is_pair (scm_cdr (s)); s = scm_cddr (s))
  71     {
  72       SCM sym = scm_car (s);
  73       SCM val = scm_cadr (s);
  74
  75       pr->set_property (sym, val);
  76     }
  77
  78   return pr->unprotect ();
  79 }
  80
  81
  82 LY_DEFINE (ly_prob_mutable_properties, "ly:prob-mutable-properties",
  83            1, 0, 0,
  84            (SCM prob),
  85            "Retrieve an alist of mutable properties.")
  86 {
  87   LY_ASSERT_SMOB (Prob, prob, 1);
  88   Prob *ps = unsmob_prob (prob);
  89   return ps->get_property_alist (true);
  90 }
  91
  92 LY_DEFINE (ly_prob_immutable_properties, "ly:prob-immutable-properties",
  93            1, 0, 0,
  94            (SCM prob),
  95            "Retrieve an alist of mutable properties.")
  96 {
  97   LY_ASSERT_SMOB (Prob, prob, 1);
  98   Prob *ps = unsmob_prob (prob);
  99   return ps->get_property_alist (false);
 100 }
 101