lily/key.cc

   1 /*
   2   key.cc -- implement Key, Octave_key
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8 */
   9
  10 #include "key.hh"
  11 #include "debug.hh"
  12 #include "musical-pitch.hh"
  13
  14 const int NUMBER_OF_OCTAVES=14;         // ugh..
  15 const int ZEROOCTAVE=7;
  16
  17
  18 void
  19 Octave_key::print () const
  20 {
  21   for (int i= 0; i < 7 ; i++)
  22     DEBUG_OUT << "note " << i << " acc: " << accidental_i_arr_[i] << " iforce: " << internal_forceacc_b_arr_[i] << '\n';
  23 }
  24
  25
  26
  27 Octave_key::Octave_key()
  28 {
  29   accidental_i_arr_.set_size (7);
  30   internal_forceacc_b_arr_.set_size(7);
  31   clear ();
  32 }
  33
  34 void
  35 Octave_key::clear ()
  36 {
  37   for (int i= 0; i < 7 ; i++)
  38   {
  39     accidental_i_arr_[i] = 0;
  40     internal_forceacc_b_arr_[i] = false;
  41   }
  42 }
  43
  44 Key::Key()
  45 {
  46   multi_octave_b_ = false;
  47   octaves_.set_size (NUMBER_OF_OCTAVES);
  48 }
  49
  50 int
  51 Key::octave_to_index (int o) const
  52 {
  53   int i = o + ZEROOCTAVE;
  54   if (i < 0)
  55     {
  56       warning (_f ("Don't have that many octaves (%s)", to_str (o)));
  57       i = 0;
  58     }
  59   if (i >= NUMBER_OF_OCTAVES)
  60     {
  61       warning (_f ("Don't have that many octaves (%s)", to_str (o)));
  62       i = NUMBER_OF_OCTAVES -1;
  63     }
  64   return i;
  65 }
  66
  67 Octave_key const&
  68 Key::oct (int i) const
  69 {
  70   return octaves_[octave_to_index (i)];
  71 }
  72
  73
  74 void
  75 Octave_key::set (int i, int a)
  76 {
  77   if (a <= -3)
  78     {
  79       warning (_f ("underdone accidentals (%s)", to_str (a)));
  80       a = -2;
  81     }
  82   if (a >= 3)
  83     {
  84       warning (_f ("overdone accidentals (%s)", to_str (a)));
  85       a = 2;
  86     }
  87   accidental_i_arr_[i]=a;
  88 }
  89
  90 void
  91 Key::set (Musical_pitch p)
  92 {
  93   int   i = octave_to_index (p.octave_i_);
  94   octaves_[i].set (p.notename_i_,p.accidental_i_);
  95 }
  96
  97 void
  98 Key::set_internal_forceacc (Musical_pitch p)
  99 {
 100   int   i = octave_to_index (p.octave_i_);
 101   octaves_[i].internal_forceacc_b_arr_[p.notename_i_] = true;
 102 }
 103
 104 void
 105 Key::clear_internal_forceacc (Musical_pitch p)
 106 {
 107   int   i = octave_to_index (p.octave_i_);
 108   octaves_[i].internal_forceacc_b_arr_[p.notename_i_] = false;
 109 }
 110
 111 void
 112 Key::set (int n, int a)
 113 {
 114   for (int i= 0; i < NUMBER_OF_OCTAVES ; i++)
 115     octaves_[i].set (n,a);
 116 }
 117 void
 118 Key::clear ()
 119 {
 120   for (int i= 0; i < NUMBER_OF_OCTAVES ; i++)
 121     octaves_[i].clear ();
 122 }
 123 void
 124 Key::print () const
 125 {
 126   for (int i= 0; i < NUMBER_OF_OCTAVES ; i++)
 127     {
 128       DEBUG_OUT << "octave " << i - ZEROOCTAVE << " Octave_key { ";
 129       octaves_[i].print ();
 130       DEBUG_OUT << "}\n";
 131     }
 132 }
 133
 134 bool
 135 Key::different_acc (Musical_pitch p)const
 136 {
 137   return oct (p.octave_i_).acc (p.notename_i_) == p.accidental_i_;
 138 }
 139
 140
 141 bool
 142 Key::internal_forceacc (Musical_pitch p)const
 143 {
 144   return oct (p.octave_i_).internal_forceacc_b_arr_[p.notename_i_];
 145 }
 146
 147
 148 bool
 149 Key::double_to_single_acc (Musical_pitch p) const
 150 {
 151   return ((oct (p.octave_i_).acc (p.notename_i_) == -2
 152       && p.accidental_i_ == -1)
 153
 154          || (oct (p.octave_i_).acc (p.notename_i_) == 2
 155             && p.accidental_i_ == 1));
 156 }