lib/duration.cc

   1 /*
   2   duration.cc -- implement Duration, Plet,
   3
   4   source file of the LilyPond music typesetter
   5
   6   (c)  1997--1999 Jan Nieuwenhuizen <janneke@gnu.org>
   7            Han-Wen Nienhuys <hanwen@cs.uu.nl>
   8
   9
  10   UGH. Duration is broken.
  11 */
  12
  13 #include <assert.h>
  14
  15 #include "proto.hh"
  16 #include "string.hh"
  17 #include "source-file.hh"
  18 #include "source.hh"
  19 #include "rational.hh"
  20 #include "duration.hh"
  21 #include "duration-convert.hh"
  22 #include "duration-iter.hh"
  23
  24 // statics Duration
  25 int Duration::division_1_i_s = 384 * 4;
  26
  27
  28 Duration::Duration ()
  29 {
  30   durlog_i_ = 0;
  31   dots_i_ = 0;
  32   ticks_i_ = 0;
  33 }
  34
  35 bool
  36 Duration::duration_type_b (int t)
  37 {
  38   /*
  39     ugh. Assuming behavior of conversion funcs on broken input.
  40    */
  41   return t == Duration_convert::type2_i (Duration_convert::i2_type (t));
  42 }
  43
  44 void
  45 Duration::compress (Rational m)
  46 {
  47   plet_.iso_i_ *= m.num_i ();
  48   plet_.type_i_ *= m.den_i ();
  49 }
  50
  51 Rational
  52 Duration::length_mom () const
  53 {
  54   return Duration_convert::dur2_mom (*this);
  55 }
  56
  57 void
  58 Duration::set_plet (int i, int t)
  59 {
  60   plet_.iso_i_ = i;
  61   plet_.type_i_ = t;
  62 }
  63
  64 /*
  65 void
  66 Duration::set_plet (Duration d)
  67 {
  68   plet_.iso_i_ = d.plet_.iso_i_;
  69   plet_.type_i_ = d.plet_.type_i_;
  70 }
  71 */
  72
  73 void
  74 Duration::set_ticks (int ticks_i)
  75 {
  76   assert (durlog_i_ <10);
  77   assert (!dots_i_);
  78   ticks_i_ = ticks_i;
  79 }
  80
  81 String
  82 Duration::str () const
  83 {
  84   return Duration_convert::dur2_str (*this);
  85 }
  86
  87
  88 bool
  89 Duration::plet_b ()
  90 {
  91   return !plet_.unit_b ();
  92 }
  93