New directory tree, with preprocessor/ inside interpretor/.

[Faustine.git] / interpretor / faust-0.9.47mr3 / compiler / tlib / shlysis.cpp

diff --git a/interpretor/faust-0.9.47mr3/compiler/tlib/shlysis.cpp b/interpretor/faust-0.9.47mr3/compiler/tlib/shlysis.cpp
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--- a/interpretor/faust-0.9.47mr3/compiler/tlib/shlysis.cpp
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-/************************************************************************
- ************************************************************************
-    FAUST compiler
-       Copyright (C) 2003-2004 GRAME, Centre National de Creation Musicale
-    ---------------------------------------------------------------------
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- ************************************************************************
- ************************************************************************/
- 
- 
- 
-/*****************************************************************************
-******************************************************************************
-                                                               Tree Sharing Analysis
-                                               Y. Orlarey, (c) Grame 2002
-------------------------------------------------------------------------------
-The sharing analysis of tree t is the annotation of all its subtrees t' 
-with their number of occurences in t. As this annotation of t' depends of
-a context (the tree t for which t' is a subtree) a specific property key
-unique to each sharing analysis must be generated.
-
- API:
- ---- 
-       
-       shprkey(t) -> k         = unique sharing property key of t
-       shcount(k,t') -> n      = returns the number of occurences of t' in t (where k = shprkey(t))
-       shlysis(t)      -> k    = annotated the subtrees of t with prop (key sharing-count)
-                                                 (0 if t' is not a subtree of t)
-
- History :
- ---------
-       2002-04-08 : First version
-    2006-03-25 : Modifications for new symbolic rec trees
-       
-******************************************************************************
-*****************************************************************************/
-
- /**
- * @file shlysis.cpp
- * The sharing analysis of tree t is the annotation of all its subtrees t' 
- * with their number of occurences in t. As this annotation of t' depends of
- * a context (the tree t for which t' is a subtree) a specific property key
- * unique to each sharing analysis must be generated.
- */
-
-#include    <string.h>
-#include    <stdlib.h>
-#include    <stdio.h>
-
-#include       "shlysis.hh"
-#include "compatibility.hh"
-
-/**
- * Create a specific property key for the sharing count of subtrees of t
- */
-
-Tree shprkey(Tree t) 
-{
-       char    name[256];
-       snprintf(name, 256, "SHARED IN %p : ", (CTree*)t);
-       return tree(unique(name));
-}      
-
-
-/**
- * Return the value of sharing count or 0
- */
-
-int shcount(Tree key, Tree t)
-{
-       Tree c;
-       if (getProperty(t, key, c)) {
-               return c->node().getInt();
-       } else {
-               return 0;
-       }
-}      
-
-
-
-//------------------------------------------------------------------------------
-// Create a specific property key for the sharing count of subtrees of t
-//------------------------------------------------------------------------------
-
-static void annotate(Tree k, Tree t, barrier foo);
-
-static bool nobarrier (const Tree& t) { return false; }
-
-/**
- * Do a sharing analysis : annotates all the subtrees of t 
- * with there occurences
- */
-Tree shlysis(Tree t, barrier foo)
-{
-       Tree k = shprkey(t);
-       annotate(k, t, foo);
-       return k;
-}
-
-
-/**
- * Do a sharing analysis : annotates all the subtrees of t 
- * with there occurences
- */
-Tree shlysis(Tree t)
-{
-       Tree k = shprkey(t);
-       annotate(k, t, nobarrier);
-       return k;
-}
-
-
-/**
- * Recursively increment the occurences count
- * of t and its subtrees
- */
-static void annotate(Tree k, Tree t, barrier foo)
-{
-       cerr << "Annotate " << *t << endl;
-       int c = shcount(k,t);
-       if (c==0) {
-               // First visit
-               Tree var, body;
-               if (isRec(t, var, body)) {
-                       // special case for recursive trees
-                       setProperty(t, k, tree(1));
-                       annotate(k, body, foo);
-                       return;
-               } else {
-                       int n = t->arity();
-                       if (n>0 && ! foo(t)) {
-                               for (int i=0; i<n; i++) annotate(k, t->branch(i), foo);
-                       }
-               }
-       } else {
-               //printf(" annotate %p with %d\n", (CTree*)t, c+1);
-       }
-       setProperty(t, k, tree(c+1));
-}