/*
- duration.cc -- implement Duration
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the LilyPond music typesetter
-
- (c) 1997--2008 Jan Nieuwenhuizen <janneke@gnu.org>
+ Copyright (C) 1997--2014 Jan Nieuwenhuizen <janneke@gnu.org>
Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#include "duration.hh"
}
LY_DEFINE (ly_duration_less_p, "ly:duration<?",
- 2, 0, 0, (SCM p1, SCM p2),
- "Is @var{p1} shorter than @var{p2}?")
+ 2, 0, 0, (SCM p1, SCM p2),
+ "Is @var{p1} shorter than @var{p2}?")
{
LY_ASSERT_SMOB (Duration, p1, 1);
LY_ASSERT_SMOB (Duration, p2, 2);
}
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:"
- " 1@tie{}is a half note, 2@tie{}is a quarter note, 3@tie{}is an"
- " eighth note, etc. The number of dots after the note is given by"
- " the optional argument @var{dotcount}.\n"
- "\n"
- "The duration factor is optionally given by @var{num} 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 dots.")
+ 1, 3, 0, (SCM length, SCM dotcount, SCM num, SCM den),
+ "@var{length} is the negative logarithm (base 2) of the duration:"
+ " 1@tie{}is a half note, 2@tie{}is a quarter note, 3@tie{}is an"
+ " eighth note, etc. The number of dots after the note is given by"
+ " the optional argument @var{dotcount}.\n"
+ "\n"
+ "The duration factor is optionally given by integers @var{num} and"
+ " @var{den}, alternatively by a single rational number.\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 dots.")
{
LY_ASSERT_TYPE (scm_is_integer, length, 1);
int dots = 0;
if (dotcount != SCM_UNDEFINED)
{
- LY_ASSERT_TYPE (scm_is_integer, dotcount,2);
+ LY_ASSERT_TYPE (scm_is_integer, dotcount, 2);
dots = scm_to_int (dotcount);
}
bool compress = false;
- if (num != SCM_UNDEFINED)
+ if (!SCM_UNBNDP (num))
{
- LY_ASSERT_TYPE (scm_is_number, num, 3);
+ LY_ASSERT_TYPE (ly_is_rational, num, 3);
compress = true;
}
else
num = scm_from_int (1);
- if (den != SCM_UNDEFINED)
+ if (!SCM_UNBNDP (den))
{
- LY_ASSERT_TYPE (scm_is_number, den, 4);
+ LY_ASSERT_TYPE (scm_is_integer, den, 4);
compress = true;
}
else
Duration p (scm_to_int (length), dots);
if (compress)
- p = p.compressed (Rational (scm_to_int (num), scm_to_int (den)));
+ p = p.compressed (ly_scm2rational (scm_divide (num, 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}.")
+ 1, 0, 0, (SCM dur),
+ "Extract the duration log from @var{dur}.")
{
LY_ASSERT_SMOB (Duration, dur, 1);
return scm_from_int (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}.")
+ 1, 0, 0, (SCM dur),
+ "Extract the dot count from @var{dur}.")
{
LY_ASSERT_SMOB (Duration, dur, 1);
return scm_from_int (unsmob_duration (dur)->dot_count ());
}
LY_DEFINE (ly_intlog2, "ly:intlog2",
- 1, 0, 0, (SCM d),
- "The 2-logarithm of 1/@var{d}.")
+ 1, 0, 0, (SCM d),
+ "The 2-logarithm of 1/@var{d}.")
{
LY_ASSERT_TYPE (scm_is_number, d, 1);
int log = intlog2 (scm_to_int (d));
}
LY_DEFINE (ly_duration_length, "ly:duration-length",
- 1, 0, 0, (SCM dur),
- "The length of the duration as a @code{moment}.")
+ 1, 0, 0, (SCM dur),
+ "The length of the duration as a @code{moment}.")
{
LY_ASSERT_SMOB (Duration, dur, 1);
return Moment (unsmob_duration (dur)->get_length ()).smobbed_copy ();
}
LY_DEFINE (ly_duration_2_string, "ly:duration->string",
- 1, 0, 0, (SCM dur),
- "Convert @var{dur} to a string.")
+ 1, 0, 0, (SCM dur),
+ "Convert @var{dur} to a string.")
{
LY_ASSERT_SMOB (Duration, dur, 1);
return ly_string2scm (unsmob_duration (dur)->to_string ());
}
LY_DEFINE (ly_duration_factor, "ly:duration-factor",
- 1, 0, 0, (SCM dur),
- "Extract the compression factor from @var{dur}."
- " Return it as a pair.")
+ 1, 0, 0, (SCM dur),
+ "Extract the compression factor from @var{dur}."
+ " Return it as a pair.")
{
LY_ASSERT_SMOB (Duration, dur, 1);
Rational r = unsmob_duration (dur)->factor ();
return scm_cons (scm_from_int64 (r.num ()), scm_from_int64 (r.den ()));
}
+
+// This is likely what ly:duration-factor should have been in the
+// first place.
+LY_DEFINE (ly_duration_scale, "ly:duration-scale",
+ 1, 0, 0, (SCM dur),
+ "Extract the compression factor from @var{dur}."
+ " Return it as a rational.")
+{
+ LY_ASSERT_SMOB (Duration, dur, 1);
+ Rational r = unsmob_duration (dur)->factor ();
+
+ return ly_rational2scm (r);
+}
projects / lilypond.git / blobdiff