-/* TODO: add optional factor argument. */
-LY_DEFINE (ly_make_moment, "ly:make-moment",
- 2, 2, 0, (SCM n, SCM d, SCM gn, SCM gd),
- "Create the rational number with main timing @var{n}/@var{d}, "
- "and optional grace timin @var{gn}/@var{gd}.\n"
- "\n"
- "\n"
- "Moment is a point in musical time. "
- "It is consists of a pair of rationals (@var{m},@var{g}), "
- "where @var{m} is the timing for the main\n"
- "notes, and @var{g} the timing for grace notes. "
- "In absence of grace notes, @var{g} is zero.\n")
-{
- SCM_ASSERT_TYPE (scm_is_integer (n), n, SCM_ARG1, __FUNCTION__, "integer");
- SCM_ASSERT_TYPE (scm_is_integer (d), d, SCM_ARG2, __FUNCTION__, "integer");
-
- int grace_num = 0;
- if (gn != SCM_UNDEFINED)
- {
- SCM_ASSERT_TYPE (scm_is_integer (gn), gn, SCM_ARG3, __FUNCTION__, "integer");
- grace_num = scm_to_int (gn);
- }
-
- int grace_den = 1;
- if (gd != SCM_UNDEFINED)
- {
- SCM_ASSERT_TYPE (scm_is_integer (gd), gd, SCM_ARG4, __FUNCTION__, "integer");
- grace_den = scm_to_int (gd);
- }
-
- return Moment (Rational (scm_to_int (n), scm_to_int (d)),
- Rational (grace_num, grace_den)).smobbed_copy ();
-}
-
-LY_DEFINE (ly_add_moment, "ly:add-moment",
- 2, 0, 0, (SCM a, SCM b),
- "Add two moments.")
-{
- Moment *ma = unsmob_moment (a);
- Moment *mb = unsmob_moment (b);
- SCM_ASSERT_TYPE (ma, a, SCM_ARG1, __FUNCTION__, "moment");
- SCM_ASSERT_TYPE (mb, b, SCM_ARG2, __FUNCTION__, "moment");
- return (*ma + *mb).smobbed_copy ();
-}
-
-LY_DEFINE (ly_mul_moment,"ly:mul-moment",
- 2, 0, 0, (SCM a, SCM b),
- "Multiply two moments.")
-{
- Moment *ma = unsmob_moment (a);
- Moment *mb = unsmob_moment (b);
- SCM_ASSERT_TYPE (ma, a, SCM_ARG1, __FUNCTION__, "moment");
- SCM_ASSERT_TYPE (mb, b, SCM_ARG2, __FUNCTION__, "moment");
- return (*ma * *mb).smobbed_copy ();
-}
-
-LY_DEFINE (ly_div_moment,"ly:div-moment",
- 2, 0, 0, (SCM a, SCM b),
- "Divide two moments.")
-{
- Moment *ma = unsmob_moment (a);
- Moment *mb = unsmob_moment (b);
- SCM_ASSERT_TYPE (ma, a, SCM_ARG1, __FUNCTION__, "moment");
- SCM_ASSERT_TYPE (mb, b, SCM_ARG2, __FUNCTION__, "moment");
- return (*ma / *mb).smobbed_copy ();