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/************************************************************************
************************************************************************
FAUST compiler
Copyright (C) 2003-2018 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.
************************************************************************
************************************************************************/
#include <stdlib.h>
#include <iostream>
#include "exception.hh"
#include "global.hh"
#include "occurences.hh"
#include "recursivness.hh"
#include "sigtype.hh"
#include "sigtyperules.hh"
using namespace std;
/**
* Extended Variability with recursiveness indication
*/
static int xVariability(int v, int r)
{
// cerr << "xVariability (" << v << ", " << r << ")" << endl;
// faustassert(v < 3); // kKonst=0, kBlock=1, kSamp=2
// faustassert(r==0 | v==2);
if (r > 1) r = 1;
return (int)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;
fMinDelay = 0;
fMaxDelay = 0;
}
Occurences* Occurences::incOccurences(int v, int r, int d)
{
int ctxt = xVariability(v, r);
// faustassert(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("OCCURRENCES"));
if (isList(root)) {
while (isList(root)) {
// incOcc(kSamp, 1, hd(root));
incOcc(gGlobal->nil, kSamp, 0, 0, hd(root));
root = tl(root);
}
// cerr << "END OF LIST IS " << *root << endl;
} else {
// incOcc(kSamp, 1, root);
incOcc(gGlobal->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);
faustassert(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));
}
#if 0
/**
* 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);
}
#endif
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