src/key.cc

   1 #include "key.hh"
   2
   3 const int OCTAVES=14;
   4 const int ZEROOCTAVE=7;
   5
   6 Key::Key()
   7 {
   8     accidentals.set_size(7);
   9     for (int i= 0; i < 7 ; i++)
  10         accidentals[i] = 0;
  11 }
  12
  13 Local_key::Local_key()
  14 {
  15     octaves.set_size(OCTAVES);
  16 }
  17
  18 Key&
  19 Local_key::oct(int i)
  20 {
  21     return octaves[i+ZEROOCTAVE];
  22 }
  23
  24 void
  25 Key::set(int i, int a)
  26 {
  27     assert(a > -3 && a < 3);
  28     accidentals[i]=a;
  29 }
  30
  31
  32 void
  33 Local_key::reset(Key k)
  34 {
  35     for (int i= 0; i < OCTAVES ; i++)
  36         octaves[i] = k;
  37 }
  38
  39 Array<int>
  40 Key::read(Array<Scalar> s)
  41 {
  42     Array<int> newkey;
  43     for (int j = 0; j < 7; j++)
  44         accidentals[j] = 0;
  45
  46     for (int i=0; i < s.size(); ) {
  47         int large = s[i++];
  48         int small = s[i++];
  49         accidentals[large]=small;
  50
  51         newkey.push(large);
  52         newkey.push(small);
  53     }
  54     return newkey;
  55 }
  56
  57 Array<int>
  58 Key::oldkey_undo(Array<Scalar>s)
  59 {
  60     Array<int> oldkey;
  61     Array<int> newkey;
  62     newkey.set_size(7);
  63     for (int i=0; i < newkey.size(); i++)
  64         newkey[i] = 0;
  65
  66     for (int i=0; i < s.size(); ) {
  67         int large = s[i++];
  68         int small = s[i++];
  69         newkey[large] = small;
  70     }
  71     for (int i=0; i < newkey.size(); i++)
  72         if (accidentals[i] && accidentals[i] != newkey[i]) {
  73             oldkey.push(i);
  74             oldkey.push(0);
  75         }
  76
  77
  78     return oldkey;
  79 }