- architectural checkpoint for zeta-function.

[ginac.git] / ginac / numeric.h

diff --git a/ginac/numeric.h b/ginac/numeric.h
index b8abb189d04d853f622952ac8b1c017084162416..92755b3eb390978e263646552a15fec02a0a54de 100644 (file)
--- a/ginac/numeric.h
+++ b/ginac/numeric.h
@@ -1,7 +1,8 @@
 /** @file numeric.h
  *
- *  Makes the interface to the underlying bignum package available.
- *
+ *  Makes the interface to the underlying bignum package available. */
+
+/*
  *  GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
@@ -24,12 +25,15 @@
 
 #include <strstream>
 #include <ginac/basic.h>
-
-#define HASHVALUE_NUMERIC 0x80000001U
+#include <ginac/ex.h>
 
 class cl_N;     // We want to include cln.h only in numeric.cpp in order to 
                 // avoid namespace pollution and keep compile-time low.
 
+namespace GiNaC {
+
+#define HASHVALUE_NUMERIC 0x80000001U
+
 /** This class is used to instantiate a global object Digits which
  *  behaves just like Maple's Digits.  We need an object rather than a
  *  dumber basic type since as a side-effect we let it change
@@ -166,6 +170,7 @@ public:
     numeric power_dyn(numeric const & other) const { return power(other); }
     */
     numeric inverse(void) const;
+    int csgn(void) const;
     int compare(numeric const & other) const;
     bool is_equal(numeric const & other) const;
     bool is_zero(void) const;
@@ -233,7 +238,9 @@ numeric tanh(numeric const & x);
 numeric asinh(numeric const & x);
 numeric acosh(numeric const & x);
 numeric atanh(numeric const & x);
+numeric zeta(numeric const & x);
 numeric gamma(numeric const & x);
+numeric psi(numeric const & n, numeric const & x);
 numeric factorial(numeric const & n);
 numeric doublefactorial(numeric const & n);
 numeric binomial(numeric const & n, numeric const & k);
@@ -262,6 +269,9 @@ struct numeric_fail
 inline numeric inverse(numeric const & x)
 { return x.inverse(); }
 
+inline bool csgn(numeric const & x)
+{ return x.csgn(); }
+
 inline bool is_zero(numeric const & x)
 { return x.is_zero(); }
 
@@ -317,7 +327,12 @@ ex PiEvalf(void);
 ex EulerGammaEvalf(void);
 ex CatalanEvalf(void);
 
-#define ex_to_numeric(X) static_cast<numeric const &>(*(X).bp)
+// utility functions
+inline const numeric &ex_to_numeric(const ex &e)
+{
+       return static_cast<const numeric &>(*e.bp);
+}
 
+} // namespace GiNaC
 
 #endif // ndef __GINAC_NUMERIC_H__