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/********************* -*- C++ -*- */
/** 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 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 "node_value.h"
#include <sstream>
using namespace std;
namespace CVC4 {
size_t NodeValue::next_id = 1;
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(unsigned(UNDEFINED_KIND)), d_nchildren(0) {
}
NodeValue::~NodeValue() {
for(ev_iterator i = ev_begin(); i != ev_end(); ++i) {
(*i)->dec();
}
}
uint64_t NodeValue::hash() const {
return computeHash(d_kind, ev_begin(), ev_end());
}
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::iterator NodeValue::begin() {
return node_iterator(d_children);
}
NodeValue::iterator NodeValue::end() {
return node_iterator(d_children + d_nchildren);
}
NodeValue::const_iterator NodeValue::begin() const {
return const_node_iterator(d_children);
}
NodeValue::const_iterator NodeValue::end() const {
return const_node_iterator(d_children + d_nchildren);
}
NodeValue::ev_iterator NodeValue::ev_begin() {
return d_children;
}
NodeValue::ev_iterator NodeValue::ev_end() {
return d_children + d_nchildren;
}
NodeValue::const_ev_iterator NodeValue::ev_begin() const {
return d_children;
}
NodeValue::const_ev_iterator NodeValue::ev_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) {
out << ":" << this;
} else {
for(const_ev_iterator i = ev_begin(); i != ev_end(); ++i) {
if(i != ev_end()) {
out << " ";
}
out << *i;
}
}
out << ")";
}
}/* CVC4 namespace */
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