-MAKE_SCHEME_CALLBACK (Duration, less_p, 2);
-SCM
-Duration::less_p (SCM p1, SCM p2)
-{
- Duration *a = unsmob_duration (p1);
- Duration *b = unsmob_duration (p2);
-
- if (compare (*a, *b) < 0)
- return SCM_BOOL_T;
- else
- return SCM_BOOL_F;
-}
-
-LY_DEFINE (ly_duration_less_p, "ly:duration<?",
- 2, 0, 0, (SCM p1, SCM p2),
- "Is @var{p1} shorter than @var{p2}?")
-{
- Duration *a = unsmob_duration (p1);
- Duration *b = unsmob_duration (p2);
-
- SCM_ASSERT_TYPE (a, p1, SCM_ARG1, __FUNCTION__, "Duration");
- SCM_ASSERT_TYPE (b, p2, SCM_ARG2, __FUNCTION__, "Duration");
-
- if (Duration::compare (*a, *b) < 0)
- return SCM_BOOL_T;
- else
- return SCM_BOOL_F;
-}
-
-LY_DEFINE (ly_make_duration, "ly:make-duration",
- 1, 3, 0, (SCM length, SCM dotcount, SCM num, SCM den),
- "@var{length} is the negative logarithm (base 2) of the duration:\n"
- "1 is a half note, 2 is a quarter note, 3 is an eighth\n"
- "note, etc. The number of dots after the note is given by\n"
- "the optional argument @var{dotcount}.\n"
- "\n"
- "The duration factor is optionally given by @var{num}\n"
- "and @var{den}.\n\n"
- "A duration is a musical duration, "
- "i.e. a length of time described by a power of two "
- "(whole, half, quarter, etc.) and a number of augmentation\n"
- "dots. \n")
-{
- SCM_ASSERT_TYPE (scm_integer_p (length) == SCM_BOOL_T,
- length, SCM_ARG1, __FUNCTION__, "integer");
-
- int dots = 0;
- if (dotcount != SCM_UNDEFINED)
- {
- SCM_ASSERT_TYPE (scm_integer_p (dotcount) == SCM_BOOL_T,
- dotcount, SCM_ARG2, __FUNCTION__, "integer");
- dots = scm_to_int (dotcount);
- }
-
- bool compress = false;
- if (num != SCM_UNDEFINED)
- {
- SCM_ASSERT_TYPE (scm_is_number (num), length, SCM_ARG3, __FUNCTION__, "integer");
- compress = true;
- }
- else
- num = scm_int2num (1);
-
- if (den != SCM_UNDEFINED)
- {
- SCM_ASSERT_TYPE (scm_is_number (den), length, SCM_ARG4, __FUNCTION__, "integer");
- compress = true;
- }
- else
- den = scm_int2num (1);
-
- Duration p (scm_to_int (length), dots);
- if (compress)
- p = p.compressed (Rational (scm_to_int (num), scm_to_int (den)));
-
- return p.smobbed_copy ();
-}
-
-LY_DEFINE (ly_duration_log, "ly:duration-log",
- 1, 0, 0, (SCM dur),
- "Extract the duration log from @var{dur}")
-{
- SCM_ASSERT_TYPE (unsmob_duration (dur), dur, SCM_ARG1, __FUNCTION__, "duration");
- return scm_int2num (unsmob_duration (dur)->duration_log ());
-}
-
-LY_DEFINE (ly_duration_dot_count, "ly:duration-dot-count",
- 1, 0, 0, (SCM dur),
- "Extract the dot count from @var{dur}")
-{
- SCM_ASSERT_TYPE (unsmob_duration (dur), dur, SCM_ARG1, __FUNCTION__, "duration");
- return scm_int2num (unsmob_duration (dur)->dot_count ());
-}
-
-LY_DEFINE (ly_intlog2, "ly:intlog2",
- 1, 0, 0, (SCM d),
- "The 2-logarithm of 1/@var{d}.")
-{
- SCM_ASSERT_TYPE (scm_is_number (d), d, SCM_ARG1, __FUNCTION__, "integer");
- int log = intlog2 (scm_to_int (d));
- return scm_int2num (log);
-}
-
-LY_DEFINE (ly_duration_factor, "ly:duration-factor",
- 1, 0, 0, (SCM dur),
- "Extract the compression factor from @var{dur}. Return as a pair.")
-{
- SCM_ASSERT_TYPE (unsmob_duration (dur), dur, SCM_ARG1, __FUNCTION__, "duration");
- Rational r = unsmob_duration (dur)->factor ();
- return scm_cons (scm_int2num (r.num ()), scm_int2num (r.den ()));
-}
-