lily/grob-array-scheme.cc

   1 /*
   2   grob-array-scheme.cc -- implement Grob_array 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
  10 #include "grob-array.hh"
  11 #include "grob.hh"
  12
  13 LY_DEFINE (ly_grob_array_length, "ly:grob-array-length",
  14            1, 0, 0,
  15            (SCM grob_arr),
  16            "Return the length of @var{grob-arr}.")
  17 {
  18   LY_ASSERT_SMOB (Grob_array, grob_arr, 1);
  19
  20   Grob_array *me = unsmob_grob_array (grob_arr);
  21   return  scm_from_int (me->size ());
  22 }
  23
  24
  25 LY_DEFINE (ly_grob_array_ref, "ly:grob-array-ref",
  26            2, 0, 0,
  27            (SCM grob_arr, SCM index),
  28            "Retrieve the @var{index}th element of @var{grob-arr}.")
  29 {
  30   Grob_array *me = unsmob_grob_array (grob_arr);
  31   LY_ASSERT_SMOB (Grob_array, grob_arr, 1);
  32   LY_ASSERT_TYPE (scm_is_integer, index, 2);
  33
  34   vsize i = scm_to_unsigned (index);
  35   if (i == VPOS || i >= me->size ())
  36     scm_out_of_range (NULL, scm_from_unsigned (i));
  37
  38   return me->grob (i)->self_scm ();
  39 }
  40