Added GMP backed Rational and Integer classes, and white box tests for them. You may have to reconfigure after this update.

1 files changed, 172 insertions, 0 deletions

diff --git a/src/util/rational.h b/src/util/rational.h
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+++ b/src/util/rational.h
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+/*********************                                                        */
+/** rational.h
+ ** Original author: taking
+ ** Major contributors: none
+ ** Minor contributors (to current version): none
+ ** 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.
+ **
+ ** A multiprecision rational constant.
+ **/
+
+#include <gmpxx.h>
+#include <string>
+#include "integer.h"
+
+#ifndef __CVC4__RATIONAL_H
+#define __CVC4__RATIONAL_H
+
+namespace CVC4 {
+
+class Rational {
+private:
+  /**
+   * Stores the value of the rational is stored in a C++ GMP rational class.
+   * Using this instead of mpq_t allows for easier destruction.
+   */
+  mpq_class d_value;
+
+  /**
+   * Constructs a Rational from a mpq_class object.
+   * Does a deep copy.
+   * Assumes that the value is in canonical form, and thus does not
+   * have to call canonicalize() on the value.
+   */
+  Rational(const mpq_class& val) : d_value(val) {  }
+
+public:
+
+  /** Constructs a rational with the value 0/1. */
+  Rational() : d_value(0){
+    d_value.canonicalize();
+  }
+
+  /**
+   * Constructs a Rational from a C string.
+   * Throws std::invalid_argument if the stribng is not a valid rational.
+   * For more information about what is a vaid rational string,
+   * see GMP's documentation for mpq_set_str().
+   */
+  Rational(const char * s, int base = 10): d_value(s,base) {
+    d_value.canonicalize();
+  }
+  Rational(const std::string& s, unsigned base = 10) : d_value(s, base) {
+    d_value.canonicalize();
+  }
+
+  Rational(const Rational& q) : d_value(q.d_value) {
+    d_value.canonicalize();
+  }
+
+  Rational(  signed int n,   signed int d) : d_value(n,d) {
+    d_value.canonicalize();
+  }
+  Rational(unsigned int n, unsigned int d) : d_value(n,d) {
+    d_value.canonicalize();
+  }
+  Rational(  signed long int n,   signed long int d) : d_value(n,d) {
+    d_value.canonicalize();
+  }
+  Rational(unsigned long int n, unsigned long int d) : d_value(n,d) {
+    d_value.canonicalize();
+  }
+
+  Rational(const Integer& n, const Integer& d):
+    d_value(n.get_mpz(), d.get_mpz())
+  {
+    d_value.canonicalize();
+  }
+
+  ~Rational() {}
+
+
+  Integer getNumerator() const {
+    return Integer(d_value.get_num());
+  }
+
+  Integer getDenominator() const{
+    return Integer(d_value.get_den());
+  }
+
+
+  Rational& operator=(const Rational& x){
+    if(this == &x) return *this;
+    d_value = x.d_value;
+    return *this;
+  }
+
+  Rational operator-() const{
+    return Rational(-(d_value));
+  }
+
+  bool operator==(const Rational& y) const {
+    return d_value == y.d_value;
+  }
+
+  bool operator!=(const Rational& y) const {
+    return d_value != y.d_value;
+  }
+
+  bool operator< (const Rational& y) const {
+    return d_value < y.d_value;
+  }
+
+  bool operator<=(const Rational& y) const {
+    return d_value <= y.d_value;
+  }
+
+  bool operator> (const Rational& y) const {
+    return d_value > y.d_value;
+  }
+
+  bool operator>=(const Rational& y) const {
+    return d_value >= y.d_value;
+  }
+
+
+  Rational operator+(const Rational& y) const{
+    return Rational( d_value + y.d_value );
+  }
+
+  Rational operator-(const Rational& y) const {
+    return Rational( d_value - y.d_value );
+  }
+
+  Rational operator*(const Rational& y) const {
+    return Rational( d_value * y.d_value );
+  }
+  Rational operator/(const Rational& y) const {
+    return Rational( d_value / y.d_value );
+  }
+
+  std::string toString(int base = 10) const {
+    return d_value.get_str(base);
+  }
+
+
+  friend std::ostream& operator<<(std::ostream& os, const Rational& n);
+
+
+  /**
+   * Computes the hash of the node from the first word of the
+   * numerator, the denominator.
+   */
+  size_t hash() const {
+    size_t numeratorHash = gmpz_hash(d_value.get_num_mpz_t());
+    size_t denominatorHash = gmpz_hash(d_value.get_den_mpz_t());
+
+    return numeratorHash xor denominatorHash;
+  }
+
+};/* class Rational */
+
+std::ostream& operator<<(std::ostream& os, const Rational& n);
+
+}/* CVC4 namespace */
+
+#endif /* __CVC4__RATIONAL_H */
+