X-Git-Url: https://git.ucc.asn.au/?p=ipdf%2Fcode.git;a=blobdiff_plain;f=src%2Frational.h;h=0fa5d9910f3b7fa8136717bc971c5a7b6f23487a;hp=f9157c766f6b41f0fbdf061f3369183c500f81cc;hb=138ee74c900c6f485cdd959d55c01099d6043661;hpb=8b3424a48d2d2e20de1a0e60ff6e1d84b9b5e226

diff --git a/src/rational.h b/src/rational.h
index f9157c7..0fa5d99 100644
--- a/src/rational.h
+++ b/src/rational.h
@@ -23,6 +23,7 @@ template <class T> T Tabs(const T & a)
 template <> Arbint Tabs(const Arbint & a);
 template <> Gmpint Tabs(const Gmpint & a);
 
+
 /* Recursive version  of GCD
 template <class T>
 T gcd(const T & a, const T & b)
@@ -172,6 +173,15 @@ struct Rational
 	Rational & operator-=(const Rational & r) {this->operator=(*this-r); return *this;}
 	Rational & operator*=(const Rational & r) {this->operator=(*this*r); return *this;}
 	Rational & operator/=(const Rational & r) {this->operator=(*this/r); return *this;}
+	Rational Sqrt() const
+	{
+		return Rational(sqrt(ToDouble()));
+	}
+
+	int64_t ToInt64() const
+	{
+		return (int64_t)ToDouble();
+	}
 
 	double ToDouble() const 
 	{
@@ -207,6 +217,11 @@ struct Rational
 };
 
 
+template <class P>
+Rational<P> Abs(const Rational<P> & a)
+{
+	return Rational<P>(Tabs(a.P), a.Q);
+}
 
 }