94
89
Duration::print_smob (SCM s, SCM port, scm_print_state *)
96
Duration *r = (Duration *) ly_cdr (s);
91
Duration *r = (Duration *) SCM_CELL_WORD_1 (s);
98
93
scm_puts ("#<Duration ", port);
99
scm_display (scm_makfrom0str (r->to_string ().to_str0 ()), port);
94
scm_display (scm_makfrom0str (r->to_string ().c_str ()), port);
100
95
scm_puts (" >", port);
106
Duration::equal_p (SCM a , SCM b)
101
Duration::equal_p (SCM a, SCM b)
108
Duration *p = (Duration *) ly_cdr (a);
109
Duration *q = (Duration *) ly_cdr (b);
103
Duration *p = (Duration *) SCM_CELL_WORD_1 (a);
104
Duration *q = (Duration *) SCM_CELL_WORD_1 (b);
111
106
bool eq = p->dots_ == q->dots_
112
107
&& p->durlog_ == q->durlog_
115
110
return eq ? SCM_BOOL_T : SCM_BOOL_F;
118
MAKE_SCHEME_CALLBACK (Duration, less_p, 2);
120
Duration::less_p (SCM p1, SCM p2)
122
Duration *a = unsmob_duration (p1);
123
Duration *b = unsmob_duration (p2);
125
if (compare (*a, *b) < 0)
131
LY_DEFINE (duration_less, "ly:duration<?",
132
2, 0, 0, (SCM p1, SCM p2),
133
"Is @var{p1} shorter than @var{p2}?")
135
Duration *a = unsmob_duration (p1);
136
Duration *b = unsmob_duration (p2);
138
SCM_ASSERT_TYPE (a, p1, SCM_ARG1, __FUNCTION__, "Duration");
139
SCM_ASSERT_TYPE (b, p2, SCM_ARG2, __FUNCTION__, "Duration");
141
if (Duration::compare (*a, *b) < 0)
147
LY_DEFINE (make_duration, "ly:make-duration",
148
1, 3, 0, (SCM length, SCM dotcount, SCM num, SCM den),
149
"@var{length} is the negative logarithm (base 2) of the duration:\n"
150
"1 is a half note, 2 is a quarter note, 3 is an eighth\n"
151
"note, etc. The number of dots after the note is given by\n"
152
"the optional argument @var{dotcount}.\n"
154
"The duration factor is optionally given by @var{num}\n"
156
"A duration is a musical duration, "
157
"i.e. a length of time described by a power of two "
158
"(whole, half, quarter, etc.) and a number of augmentation\n"
161
SCM_ASSERT_TYPE (scm_integer_p (length) == SCM_BOOL_T,
162
length, SCM_ARG1, __FUNCTION__, "integer");
165
if (dotcount != SCM_UNDEFINED)
167
SCM_ASSERT_TYPE (scm_integer_p (dotcount) == SCM_BOOL_T,
168
dotcount, SCM_ARG2, __FUNCTION__, "integer");
169
dots = gh_scm2int (dotcount);
172
bool compress = false;
173
if (num != SCM_UNDEFINED)
175
SCM_ASSERT_TYPE (gh_number_p (num), length, SCM_ARG3, __FUNCTION__, "integer");
179
num = gh_int2scm (1);
181
if (den != SCM_UNDEFINED)
183
SCM_ASSERT_TYPE (gh_number_p (den), length, SCM_ARG4, __FUNCTION__, "integer");
187
den = gh_int2scm (1);
189
Duration p (gh_scm2int (length), dots);
191
p = p.compressed (Rational (gh_scm2int (num), gh_scm2int (den)));
193
return p.smobbed_copy ();
196
LY_DEFINE (duration_log, "ly:duration-log",
198
"Extract the duration log from @var{dur}")
200
SCM_ASSERT_TYPE (unsmob_duration (dur), dur, SCM_ARG1, __FUNCTION__, "duration");
201
return gh_int2scm (unsmob_duration (dur)->duration_log ());
204
LY_DEFINE (dot_count_log, "ly:duration-dot-count", 1, 0, 0, (SCM dur),
205
"Extract the dot count from @var{dur}"
208
SCM_ASSERT_TYPE (unsmob_duration (dur), dur, SCM_ARG1, __FUNCTION__, "duration");
209
return gh_int2scm (unsmob_duration (dur)->dot_count ());
213
LY_DEFINE (ly_intlog2, "ly:intlog2",
215
"The 2-logarithm of 1/@var{d}.")
217
SCM_ASSERT_TYPE (gh_number_p (d), d, SCM_ARG1, __FUNCTION__, "integer");
218
int log = intlog2 (gh_scm2int (d));
219
return gh_int2scm (log);
222
LY_DEFINE (compression_factor, "ly:duration-factor",
224
"Extract the compression factor from @var{dur}. Return as a pair.")
226
SCM_ASSERT_TYPE (unsmob_duration (dur), dur, SCM_ARG1, __FUNCTION__, "duration");
227
Rational r = unsmob_duration (dur)->factor ();
228
return gh_cons (gh_int2scm (r.num ()), gh_int2scm (r.den ()));
232
114
Duration::duration_log () const