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/*
moment.cc -- implement Moment
source file of the GNU LilyPond music typesetter
(c) 1999--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#include "moment.hh"
#include "warn.hh"
Moment::Moment ()
{
}
Moment::Moment (int m)
{
main_part_ = Rational (m);
grace_part_ = Rational (0);
}
Moment::Moment (Rational m, Rational g)
{
main_part_ = m;
grace_part_ = g;
}
Moment::Moment (Rational m)
{
main_part_ = m;
grace_part_ = Rational (0);
}
#include "ly-smobs.icc"
IMPLEMENT_SIMPLE_SMOBS (Moment);
IMPLEMENT_TYPE_P (Moment, "ly:moment?");
SCM
Moment::mark_smob (SCM)
{
return SCM_EOL;
}
int
Moment::print_smob (SCM s, SCM port, scm_print_state *)
{
Moment *r = (Moment *) SCM_CELL_WORD_1 (s);
scm_puts ("#<Mom ", port);
string str = r->to_string ();
scm_puts ((char *)str.c_str (), port);
scm_puts (">", port);
return 1;
}
SCM
Moment::as_scheme () const
{
return scm_list_5 (ly_symbol2scm ("ly:make-moment"),
scm_from_int64 (main_part_.num ()),
scm_from_int64 (main_part_.den ()),
scm_from_int64 (grace_part_.num ()),
scm_from_int64 (grace_part_.den ()));
}
SCM
Moment::equal_p (SCM a, SCM b)
{
Moment *m1 = unsmob_moment (a);
Moment *m2 = unsmob_moment (b);
return (*m1 == *m2) ? SCM_BOOL_T : SCM_BOOL_F;
}
int
compare (Moment const &a, Moment const &b)
{
return Moment::compare (a, b);
}
int
Moment::compare (Moment const &a, Moment const &b)
{
int c = Rational::compare (a.main_part_, b.main_part_);
if (c)
return c;
return Rational::compare (a.grace_part_, b.grace_part_);
}
void
Moment::operator += (Moment const &src)
{
main_part_ += src.main_part_;
grace_part_ += src.grace_part_;
}
void
Moment::operator -= (Moment const &src)
{
main_part_ -= src.main_part_;
grace_part_ -= src.grace_part_;
}
/* Only take the main part of SRC for multiplication. */
void
Moment::operator *= (Moment const &src)
{
main_part_ *= src.main_part_;
grace_part_ *= src.main_part_;
}
/* Only take the main part of SRC for division. */
void
Moment::operator /= (Moment const &src)
{
main_part_ /= src.main_part_;
grace_part_ /= src.main_part_;
}
/* Only take the main part of SRC for division. */
void
Moment::operator %= (Moment const &src)
{
main_part_ %= src.main_part_;
grace_part_ %= src.main_part_;
}
I64
Moment::den () const
{
/* TODO: ensure MSB == 0 here */
return main_part_.den ();
}
I64
Moment::num () const
{
return main_part_.num ();
}
bool
Moment::to_bool () const
{
return main_part_ || grace_part_;
}
void
Moment::set_infinite (int k)
{
main_part_.set_infinite (k);
}
string
Moment::to_string () const
{
string s = main_part_.to_string ();
if (grace_part_)
s += "G" + grace_part_.to_string ();
return s;
}
Moment
Moment::operator - () const
{
Moment m;
m.grace_part_ = -grace_part_;
m.main_part_ = -main_part_;
return m;
}
#ifdef STREAM_SUPPORT
ostream &
operator << (ostream &os, Moment const &m)
{
os << m.to_string ();
return os;
}
#endif
Moment
robust_scm2moment (SCM m, Moment d)
{
Moment *p = unsmob_moment (m);
if (!p)
return d;
else
return *p;
}
bool
moment_less (SCM a, SCM b)
{
return *unsmob_moment (a) < *unsmob_moment (b);
}
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