2 moment.cc -- implement Moment bindings
4 source file of the GNU LilyPond music typesetter
6 (c) 1999--2005 Han-Wen Nienhuys <hanwen@cs.uu.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 ();
46 LY_DEFINE (ly_sub_moment, "ly:moment-sub",
47 2, 0, 0, (SCM a, SCM b),
48 "Subtract two moments.")
50 Moment *ma = unsmob_moment (a);
51 Moment *mb = unsmob_moment (b);
52 SCM_ASSERT_TYPE (ma, a, SCM_ARG1, __FUNCTION__, "moment");
53 SCM_ASSERT_TYPE (mb, b, SCM_ARG2, __FUNCTION__, "moment");
54 return (*ma - *mb).smobbed_copy ();
57 LY_DEFINE (ly_moment_add, "ly:moment-add",
58 2, 0, 0, (SCM a, SCM b),
61 Moment *ma = unsmob_moment (a);
62 Moment *mb = unsmob_moment (b);
63 SCM_ASSERT_TYPE (ma, a, SCM_ARG1, __FUNCTION__, "moment");
64 SCM_ASSERT_TYPE (mb, b, SCM_ARG2, __FUNCTION__, "moment");
65 return (*ma + *mb).smobbed_copy ();
68 LY_DEFINE (ly_moment_mul, "ly:moment-mul",
69 2, 0, 0, (SCM a, SCM b),
70 "Multiply two moments.")
72 Moment *ma = unsmob_moment (a);
73 Moment *mb = unsmob_moment (b);
74 SCM_ASSERT_TYPE (ma, a, SCM_ARG1, __FUNCTION__, "moment");
75 SCM_ASSERT_TYPE (mb, b, SCM_ARG2, __FUNCTION__, "moment");
76 return (*ma * * mb).smobbed_copy ();
79 LY_DEFINE (ly_moment_div, "ly:moment-div",
80 2, 0, 0, (SCM a, SCM b),
81 "Divide two moments.")
83 Moment *ma = unsmob_moment (a);
84 Moment *mb = unsmob_moment (b);
85 SCM_ASSERT_TYPE (ma, a, SCM_ARG1, __FUNCTION__, "moment");
86 SCM_ASSERT_TYPE (mb, b, SCM_ARG2, __FUNCTION__, "moment");
87 return (*ma / * mb).smobbed_copy ();
90 LY_DEFINE (ly_moment_mod, "ly:moment-mod",
91 2, 0, 0, (SCM a, SCM b),
92 "Modulo of two moments.")
94 Moment *ma = unsmob_moment (a);
95 Moment *mb = unsmob_moment (b);
96 SCM_ASSERT_TYPE (ma, a, SCM_ARG1, __FUNCTION__, "moment");
97 SCM_ASSERT_TYPE (mb, b, SCM_ARG2, __FUNCTION__, "moment");
98 return (*ma % * mb).smobbed_copy ();
102 LY_DEFINE (ly_moment_grace_numerator, "ly:moment-grace-numerator",
104 "Extract numerator from grace timing.")
106 Moment *ma = unsmob_moment (mom);
107 SCM_ASSERT_TYPE (ma, mom, SCM_ARG1, __FUNCTION__, "moment");
109 return scm_from_int (ma->grace_part_.numerator ());
112 LY_DEFINE (ly_moment_grace_denominator, "ly:moment-grace-denominator",
114 "Extract denominator from grace timing.")
116 Moment *ma = unsmob_moment (mom);
117 SCM_ASSERT_TYPE (ma, mom, SCM_ARG1, __FUNCTION__, "moment");
119 return scm_from_int (ma->grace_part_.denominator ());
121 LY_DEFINE (ly_moment_main_numerator, "ly:moment-main-numerator",
123 "Extract numerator from main timing.")
125 Moment *ma = unsmob_moment (mom);
126 SCM_ASSERT_TYPE (ma, mom, SCM_ARG1, __FUNCTION__, "moment");
128 return scm_from_int (ma->main_part_.numerator ());
131 LY_DEFINE (ly_moment_main_denominator, "ly:moment-main-denominator",
133 "Extract denominator from main timing.")
135 Moment *ma = unsmob_moment (mom);
136 SCM_ASSERT_TYPE (ma, mom, SCM_ARG1, __FUNCTION__, "moment");
138 return scm_from_int (ma->main_part_.denominator ());
141 LY_DEFINE (ly_moment_less_p, "ly:moment<?",
142 2, 0, 0, (SCM a, SCM b),
143 "Compare two moments.")
145 Moment *ma = unsmob_moment (a);
146 Moment *mb = unsmob_moment (b);
147 SCM_ASSERT_TYPE (ma, a, SCM_ARG1, __FUNCTION__, "moment");
148 SCM_ASSERT_TYPE (mb, b, SCM_ARG2, __FUNCTION__, "moment");
149 return ly_bool2scm (*ma < *mb);