Rename interpretor to interpreter.

[Faustine.git] / interpreter / preprocessor / faust-0.9.47mr3 / compiler / generator / occurences.cpp

diff --git a/interpreter/preprocessor/faust-0.9.47mr3/compiler/generator/occurences.cpp b/interpreter/preprocessor/faust-0.9.47mr3/compiler/generator/occurences.cpp
new file mode 100644 (file)
index 0000000..d0e64d9
--- /dev/null
+++ b/interpreter/preprocessor/faust-0.9.47mr3/compiler/generator/occurences.cpp
@@ -0,0 +1,173 @@
+#include <assert.h>
+#include <stdlib.h>
+#include "recursivness.hh"
+#include "occurences.hh"
+#include "sigtype.hh"
+#include "sigtyperules.hh"
+#include <iostream>
+
+using namespace std;
+
+/**
+ * Extended Variability with recursiveness indication
+ */
+static int xVariability (int v, int r)
+{
+       //cerr << "xVariability (" << v << ", " <<  r << ")" << endl;
+       //assert (v < 3);                               // kKonst=0, kBlock=1, kSamp=2
+       //assert(r==0 | v==2);
+       if (r>1) r=1;
+       return min(3, v + r);
+}
+
+//-------------------------------------------------
+//     Occurences methods
+//-------------------------------------------------
+
+Occurences::Occurences(int v, int r) : fXVariability(xVariability(v,r)) {
+       for (int i=0; i<4; i++) fOccurences[i]=0;
+       fMultiOcc = false;
+       fMaxDelay = 0;
+       fOutDelayOcc = false;
+}
+
+Occurences* Occurences::incOccurences(int v, int r, int d) {
+       int ctxt = xVariability(v,r);
+       //assert (ctxt >= fXVariability);
+       fOccurences[ctxt] += 1;
+       fMultiOcc = fMultiOcc | (ctxt > fXVariability) | (fOccurences[ctxt] > 1);
+       if (d == 0) {
+               //cerr << "Occurence outside a delay " << endl;
+               fOutDelayOcc = true;
+       }
+       if (d > fMaxDelay) {
+               //cerr << "Max delay : " << fMaxDelay << " <- " << d << endl;
+               fMaxDelay = d;
+       }
+       return this;
+}
+
+bool Occurences::hasMultiOccurences()  const   { return fMultiOcc; }
+
+bool Occurences::hasOutDelayOccurences() const { return fOutDelayOcc; }
+
+int Occurences::getMaxDelay() const
+{
+       return fMaxDelay;
+}
+
+//--------------------------------------------------
+//     Mark and retrieve occurences of subtrees of root
+//--------------------------------------------------
+
+void OccMarkup::mark(Tree root)
+{
+       fRootTree = root;
+       fPropKey = tree(unique("OCCURENCES"));
+
+       if (isList(root)) {
+               while (isList(root)) {
+                       //incOcc(kSamp, 1, hd(root));
+                       incOcc(nil, kSamp, 0, 0, hd(root));
+                       root = tl(root);
+               }
+               //cerr << "END OF LIST IS " << *root << endl;
+       } else {
+               //incOcc(kSamp, 1, root);
+               incOcc(nil, kSamp, 0, 0, root);
+       }
+}
+
+Occurences* OccMarkup::retrieve(Tree t)
+{
+       Occurences* p = getOcc(t);
+       if (p == 0) {
+               //cerr << "No Occurences info attached to : " << *t << endl;
+               //exit(1);
+       }
+       return p;
+}
+
+//------------------------------------------------------------------------------
+// Increment the occurences of t within context v,r,d and proceed recursively
+//------------------------------------------------------------------------------
+
+void OccMarkup::incOcc(Tree env, int v, int r, int d, Tree t)
+{
+       // Check if we have already visited this tree
+       Occurences* occ = getOcc(t);
+
+       if (occ==0) {
+               // 1) We build initial occurence information
+               Type    ty = getCertifiedSigType(t);
+               int v0 = ty->variability();
+               int r0 = getRecursivness(t);
+
+               occ = new Occurences(v0,r0);
+               setOcc(t, occ);
+
+               // We mark the subtrees of t
+        Tree c, x, y, z;
+               if (isSigFixDelay(t,x,y)) {
+                       Type g2 = getCertifiedSigType(y);
+                       int d2 = checkDelayInterval(g2);
+                       assert(d2>=0);
+                       incOcc(env, v0, r0, d2, x);
+                       incOcc(env, v0, r0, 0, y);
+        } else if (isSigPrefix(t,y,x)) {
+            incOcc(env, v0, r0, 1, x);
+            incOcc(env, v0, r0, 0, y);
+        } else if (isSigSelect3(t,c,y,x,z)) {
+            // make a special case for select3 implemented with real if
+            // because the c expression will be used twice in the C++
+            // translation
+                       incOcc(env, v0, r0, 0, c);
+                       incOcc(env, v0, r0, 0, c);
+            incOcc(env, v0, r0, 0, x);
+            incOcc(env, v0, r0, 0, y);
+            incOcc(env, v0, r0, 0, z);
+        } else {
+                       vector<Tree> br;
+                       int n = getSubSignals(t, br);
+                       if (n>0 && ! isSigGen(t)) {
+                               for (int i=0; i<n; i++) incOcc(env, v0, r0, 0, br[i]);
+                       }
+               }
+       }
+
+       occ->incOccurences(v,r,d);
+
+}
+
+
+
+Occurences* OccMarkup::getOcc(Tree t)
+{
+       Tree p = t->getProperty(fPropKey);
+       if (p) {
+               return (Occurences*) tree2ptr(p);
+       } else {
+               return 0;
+       }
+}
+
+
+void OccMarkup::setOcc(Tree t, Occurences* occ)
+{
+       t->setProperty(fPropKey, tree(occ));
+}
+
+
+
+/**
+ * return the position of a signal in the current recursive environment
+ * @param env the current recursive environment of the signal
+ * @param t signal we want to know the position
+ * @return the position in the recursive environment
+ */
+static int position (Tree env, Tree t, int p)
+{
+       if (isNil(env)) return 0;       // was not in the environment
+       if (hd(env) == t) return p;
+       else return position (tl(env), t, p+1);
+}