2 moment.cc -- implement Moment bindings
4 source file of the GNU LilyPond music typesetter
6 (c) 1999--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
11 /* TODO: add optional factor argument. */
12 LY_DEFINE (ly_make_moment, "ly:make-moment",
13 2, 2, 0, (SCM n, SCM d, SCM gn, SCM gd),
14 "Create the rational number with main timing @var{n}/@var{d}, "
15 "and optional grace timin @var{gn}/@var{gd}.\n"
18 "Moment is a point in musical time. "
19 "It is consists of a pair of rationals (@var{m}, @var{g}), "
20 "where @var{m} is the timing for the main\n"
21 "notes, and @var{g} the timing for grace notes. "
22 "In absence of grace notes, @var{g} is zero.\n")
24 SCM_ASSERT_TYPE (scm_is_integer (n), n, SCM_ARG1, __FUNCTION__, "integer");
25 SCM_ASSERT_TYPE (scm_is_integer (d), d, SCM_ARG2, __FUNCTION__, "integer");
28 if (gn != SCM_UNDEFINED)
30 SCM_ASSERT_TYPE (scm_is_integer (gn), gn, SCM_ARG3, __FUNCTION__, "integer");
31 grace_num = scm_to_int (gn);
35 if (gd != SCM_UNDEFINED)
37 SCM_ASSERT_TYPE (scm_is_integer (gd), gd, SCM_ARG4, __FUNCTION__, "integer");
38 grace_den = scm_to_int (gd);
41 return Moment (Rational (scm_to_int (n), scm_to_int (d)),
42 Rational (grace_num, grace_den)).smobbed_copy ();
45 LY_DEFINE (ly_sub_moment, "ly:moment-sub",
46 2, 0, 0, (SCM a, SCM b),
47 "Subtract two moments.")
49 Moment *ma = unsmob_moment (a);
50 Moment *mb = unsmob_moment (b);
51 SCM_ASSERT_TYPE (ma, a, SCM_ARG1, __FUNCTION__, "moment");
52 SCM_ASSERT_TYPE (mb, b, SCM_ARG2, __FUNCTION__, "moment");
53 return (*ma - *mb).smobbed_copy ();
56 LY_DEFINE (ly_moment_add, "ly:moment-add",
57 2, 0, 0, (SCM a, SCM b),
60 Moment *ma = unsmob_moment (a);
61 Moment *mb = unsmob_moment (b);
62 SCM_ASSERT_TYPE (ma, a, SCM_ARG1, __FUNCTION__, "moment");
63 SCM_ASSERT_TYPE (mb, b, SCM_ARG2, __FUNCTION__, "moment");
64 return (*ma + *mb).smobbed_copy ();
67 LY_DEFINE (ly_moment_mul, "ly:moment-mul",
68 2, 0, 0, (SCM a, SCM b),
69 "Multiply two moments.")
71 Moment *ma = unsmob_moment (a);
72 Moment *mb = unsmob_moment (b);
73 SCM_ASSERT_TYPE (ma, a, SCM_ARG1, __FUNCTION__, "moment");
74 SCM_ASSERT_TYPE (mb, b, SCM_ARG2, __FUNCTION__, "moment");
75 return (*ma * * mb).smobbed_copy ();
78 LY_DEFINE (ly_moment_div, "ly:moment-div",
79 2, 0, 0, (SCM a, SCM b),
80 "Divide two moments.")
82 Moment *ma = unsmob_moment (a);
83 Moment *mb = unsmob_moment (b);
84 SCM_ASSERT_TYPE (ma, a, SCM_ARG1, __FUNCTION__, "moment");
85 SCM_ASSERT_TYPE (mb, b, SCM_ARG2, __FUNCTION__, "moment");
86 return (*ma / * mb).smobbed_copy ();
89 LY_DEFINE (ly_moment_mod, "ly:moment-mod",
90 2, 0, 0, (SCM a, SCM b),
91 "Modulo of two moments.")
93 Moment *ma = unsmob_moment (a);
94 Moment *mb = unsmob_moment (b);
95 SCM_ASSERT_TYPE (ma, a, SCM_ARG1, __FUNCTION__, "moment");
96 SCM_ASSERT_TYPE (mb, b, SCM_ARG2, __FUNCTION__, "moment");
97 return (*ma % * mb).smobbed_copy ();
100 LY_DEFINE (ly_moment_grace_numerator, "ly:moment-grace-numerator",
102 "Extract numerator from grace timing.")
104 Moment *ma = unsmob_moment (mom);
105 SCM_ASSERT_TYPE (ma, mom, SCM_ARG1, __FUNCTION__, "moment");
107 return scm_from_int (ma->grace_part_.numerator ());
110 LY_DEFINE (ly_moment_grace_denominator, "ly:moment-grace-denominator",
112 "Extract denominator from grace timing.")
114 Moment *ma = unsmob_moment (mom);
115 SCM_ASSERT_TYPE (ma, mom, SCM_ARG1, __FUNCTION__, "moment");
117 return scm_from_int (ma->grace_part_.denominator ());
119 LY_DEFINE (ly_moment_main_numerator, "ly:moment-main-numerator",
121 "Extract numerator from main timing.")
123 Moment *ma = unsmob_moment (mom);
124 SCM_ASSERT_TYPE (ma, mom, SCM_ARG1, __FUNCTION__, "moment");
126 return scm_from_int (ma->main_part_.numerator ());
129 LY_DEFINE (ly_moment_main_denominator, "ly:moment-main-denominator",
131 "Extract denominator from main timing.")
133 Moment *ma = unsmob_moment (mom);
134 SCM_ASSERT_TYPE (ma, mom, SCM_ARG1, __FUNCTION__, "moment");
136 return scm_from_int (ma->main_part_.denominator ());
139 LY_DEFINE (ly_moment_less_p, "ly:moment<?",
140 2, 0, 0, (SCM a, SCM b),
141 "Compare two moments.")
143 Moment *ma = unsmob_moment (a);
144 Moment *mb = unsmob_moment (b);
145 SCM_ASSERT_TYPE (ma, a, SCM_ARG1, __FUNCTION__, "moment");
146 SCM_ASSERT_TYPE (mb, b, SCM_ARG2, __FUNCTION__, "moment");
147 return ly_bool2scm (*ma < *mb);