- Completely restructured the checks in subdir check/.

[ginac.git] / check / genex.cpp

diff --git a/check/genex.cpp b/check/genex.cpp
new file mode 100644 (file)
index 0000000..77ea18f
--- /dev/null
+++ b/check/genex.cpp
@@ -0,0 +1,58 @@
+/** @file genex.cpp
+ *
+ *  Provides some routines for generating expressions that are later used as input
+ *  in the consistency checks. */
+
+/*
+ *  GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+// For rand() and friends:
+#include <stdlib.h>
+
+#include "ginac.h"
+
+#ifndef NO_NAMESPACE_GINAC
+using namespace GiNaC;
+#endif // ndef NO_NAMESPACE_GINAC
+
+/* Create a dense univariate random polynomial in x.
+ * (of the form 9 - 22*a - 17*a^2 + 14*a^3 + 7*a^4 + 7a^5 if degree==5) */
+const ex
+dense_univariate_poly(const symbol & x, unsigned degree)
+{
+    ex unipoly;
+    
+    for (unsigned i=0; i<=degree; ++i)
+        unipoly += numeric((rand()-RAND_MAX/2))*pow(x,i);
+    
+    return unipoly;
+}
+
+/* Create a dense bivariate random polynomial in x1 and x2.
+ * (of the form 9 + 52*x1 - 27*x1^2 + 84*x2 + 7*x2^2 - 12*x1*x2 if degree ==2) */
+const ex
+dense_bivariate_poly(const symbol & x1, const symbol & x2, unsigned degree)
+{
+    ex bipoly;
+    
+    for (unsigned i1=0; i1<=degree; ++i1)
+        for (unsigned i2=0; i2<=degree-i1; ++i2)
+            bipoly += numeric((rand()-RAND_MAX/2))*pow(x1,i1)*pow(x2,i2);
+    
+    return bipoly;
+}