lily/grob-array-scheme.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2005--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6
   7   LilyPond is free software: you can redistribute it and/or modify
   8   it under the terms of the GNU General Public License as published by
   9   the Free Software Foundation, either version 3 of the License, or
  10   (at your option) any later version.
  11
  12   LilyPond is distributed in the hope that it will be useful,
  13   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15   GNU General Public License for more details.
  16
  17   You should have received a copy of the GNU General Public License
  18   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "grob-array.hh"
  22 #include "grob.hh"
  23
  24 LY_DEFINE (ly_grob_array_length, "ly:grob-array-length",
  25            1, 0, 0,
  26            (SCM grob_arr),
  27            "Return the length of @var{grob-arr}.")
  28 {
  29   LY_ASSERT_SMOB (Grob_array, grob_arr, 1);
  30
  31   Grob_array *me = unsmob_grob_array (grob_arr);
  32   return  scm_from_int (me->size ());
  33 }
  34
  35
  36 LY_DEFINE (ly_grob_array_ref, "ly:grob-array-ref",
  37            2, 0, 0,
  38            (SCM grob_arr, SCM index),
  39            "Retrieve the @var{index}th element of @var{grob-arr}.")
  40 {
  41   Grob_array *me = unsmob_grob_array (grob_arr);
  42   LY_ASSERT_SMOB (Grob_array, grob_arr, 1);
  43   LY_ASSERT_TYPE (scm_is_integer, index, 2);
  44
  45   vsize i = scm_to_unsigned (index);
  46   if (i == VPOS || i >= me->size ())
  47     scm_out_of_range (NULL, scm_from_unsigned (i));
  48
  49   return me->grob (i)->self_scm ();
  50 }
  51