interpretor/faust-0.9.47mr3/compiler/tlib/occurrences.cpp

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   3     FAUST compiler
   4         Copyright (C) 2003-2004 GRAME, Centre National de Creation Musicale
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  21 /**
  22  * @file occurrences.cpp
  23  * Count the number of occurences of each subtree of a root tree.
  24  */
  25
  26
  27
  28
  29 // construction des representations graphiques
  30
  31
  32 #include "occurrences.hh"
  33 #include    "compatibility.hh"
  34
  35 /**
  36  * Count the number of occurrences of each subtree of root
  37  */
  38 Occurrences::Occurrences(Tree root)
  39 {
  40         fKey = specificKey(root);
  41         countOccurrences(root);
  42         setCount(root,0);       // root as no occurences in itself
  43 }
  44
  45 /**
  46  * Get the number of occurrences of t
  47  */
  48 int Occurrences::getCount(Tree t)
  49 {
  50         Tree c;
  51         return (getProperty(t, fKey, c)) ? c->node().getInt() : 0;
  52 }
  53
  54 /**
  55  * Set the number of occurrences of t
  56  */
  57 void Occurrences::setCount(Tree t, int c)
  58 {
  59         setProperty(t, fKey, tree(c));
  60 }
  61
  62
  63
  64 /**
  65  * Creates a specific property key for occurrences count in root
  66  */
  67 Tree Occurrences::specificKey(Tree root)
  68 {
  69         char    keyname[256];
  70         snprintf(keyname, 256, "OCCURRENCES COUNT IN %p : ", (CTree*)root);
  71
  72         return tree(unique(keyname));
  73 }
  74
  75 /**
  76  * Increment the occurrences count of t and its subtrees
  77  */
  78 void Occurrences::countOccurrences(Tree t)
  79 {
  80         setCount(t, getCount(t)+1);     // increment t occurrences count
  81         for (int i=0; i<t->arity(); i++) {
  82                 countOccurrences(t->branch(i));
  83         }
  84 }
  85