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/********************* */
/** node_value.cpp
** Original author: mdeters
** Major contributors: none
** Minor contributors (to current version): dejan
** This file is part of the CVC4 prototype.
** Copyright (c) 2009, 2010 The Analysis of Computer Systems Group (ACSys)
** Courant Institute of Mathematical Sciences
** New York University
** See the file COPYING in the top-level source directory for licensing
** information.
**
** An expression node.
**
** Instances of this class are generally referenced through
** cvc4::Node rather than by pointer; cvc4::Node maintains the
** reference count on NodeValue instances and
**/
#include "expr/node_value.h"
#include "expr/node.h"
#include <sstream>
using namespace std;
namespace CVC4 {
size_t NodeValue::next_id = 1;
NodeValue NodeValue::s_null;
NodeValue::NodeValue() :
d_id(0),
d_rc(MAX_RC),
d_kind(NULL_EXPR),
d_nchildren(0) {
}
NodeValue::NodeValue(int) :
d_id(0),
d_rc(0),
d_kind(kindToDKind(UNDEFINED_KIND)),
d_nchildren(0) {
}
NodeValue::~NodeValue() {
for(nv_iterator i = nv_begin(); i != nv_end(); ++i) {
(*i)->dec();
}
}
void NodeValue::inc() {
// FIXME multithreading
if(EXPECT_TRUE( d_rc < MAX_RC )) {
++d_rc;
}
}
void NodeValue::dec() {
// FIXME multithreading
if(EXPECT_TRUE( d_rc < MAX_RC )) {
--d_rc;
if(EXPECT_FALSE( d_rc == 0 )) {
// FIXME gc
}
}
}
NodeValue::nv_iterator NodeValue::nv_begin() {
return d_children;
}
NodeValue::nv_iterator NodeValue::nv_end() {
return d_children + d_nchildren;
}
NodeValue::const_nv_iterator NodeValue::nv_begin() const {
return d_children;
}
NodeValue::const_nv_iterator NodeValue::nv_end() const {
return d_children + d_nchildren;
}
string NodeValue::toString() const {
stringstream ss;
toStream(ss);
return ss.str();
}
void NodeValue::toStream(std::ostream& out) const {
out << "(" << Kind(d_kind);
if(d_kind == VARIABLE) {
Node n(this);
string s;
if(n.hasAttribute(VarNameAttr(), &s)) {
out << ":" << s;
} else {
out << ":" << this;
}
} else {
for(const_nv_iterator i = nv_begin(); i != nv_end(); ++i) {
if(i != nv_end()) {
out << " ";
}
out << *i;
}
}
out << ")";
}
}/* CVC4 namespace */
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