* Avoid getrusage(2) on systems that don't have it (by ASheplyakov Alexei

[ginac.git] / check / time_lw_Qprime.cpp

diff --git a/check/time_lw_Qprime.cpp b/check/time_lw_Qprime.cpp
index 139b09b11e833a2e2ad87195916d407635e10fa0..4abedd1a3880ab9bebf53fdd3971fdff31839ab2 100644 (file)
--- a/check/time_lw_Qprime.cpp
+++ b/check/time_lw_Qprime.cpp
@@ -4,7 +4,7 @@
  *  Lewis and Michael Wester. */
 
 /*
- *  GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2005 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
@@ -18,77 +18,84 @@
  *
  *  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
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
 #include "times.h"
 
-static unsigned test(void)
+static const bool do_test = true;  // set to true in order to run this beast
+
+static unsigned test()
 {
-    // same matrix as in test P':
-    const unsigned n = 10;
-    matrix m(n*n+1,n*n+1);
-    for (unsigned i=1; i<=n*n; ++i)
-        m.set(i-1,i-1,1);
-    for (unsigned i=1; i<=n*n; ++i)
-        if (!(i%n))
-            m.set(i-1,n*n,1);
-    for (unsigned i=1; i<=n*n; ++i)
-        if (!((i-1)%n))
-            m.set(n*n,i-1,n-(i-1)/n);
-    for(unsigned i=1; i<=n; ++i)
-        for (unsigned j=1; j<=n; ++j)
-            if (i-j)
-                for (unsigned k=1; k<n; ++k)
-                    m.set((i-1)*n+k-1,(j-1)*n+k,n+1-j);
-    matrix m2(m);
-    ex a;
-    for (unsigned r=0; r<=n*n; ++r) {
-        a = m2(r,0);
-        for (unsigned c=0; c<n*n; ++c)
-            m2.set(r,c,m2(r,c+1));
-        m2.set(r,100,a);
-    }
-    for (unsigned r=0; r<=n*n; ++r)
-        for (unsigned c=0; c<=n*n; ++c)
-            if (!m(r,c).is_zero())
-                m2.set(r,c,m(r,c));
-    
-    symbol lambda("lambda");
-    ex cp = m2.charpoly(lambda);
-    
-    if (cp.coeff(lambda,0) != numeric("140816284877507872414776")) {
-        clog << "characteristic polynomial miscalculated as " << cp << endl;
-        return 1;
-    }
-    return 0;
+       // same matrix as in test P':
+       const unsigned n = 10;
+       matrix m(n*n+1,n*n+1);
+       for (unsigned i=1; i<=n*n; ++i)
+               m.set(i-1,i-1,1);
+       for (unsigned i=1; i<=n*n; ++i)
+               if (!(i%n))
+                       m.set(i-1,n*n,1);
+       for (unsigned i=1; i<=n*n; ++i)
+               if (!((i-1)%n))
+                       m.set(n*n,i-1,n-(i-1)/n);
+       for(unsigned i=1; i<=n; ++i)
+               for (unsigned j=1; j<=n; ++j)
+                       if (i-j)
+                               for (unsigned k=1; k<n; ++k)
+                                       m.set((i-1)*n+k-1,(j-1)*n+k,n+1-j);
+       matrix m2(m);
+       ex a;
+       for (unsigned r=0; r<=n*n; ++r) {
+               a = m2(r,0);
+               for (unsigned c=0; c<n*n; ++c)
+                       m2.set(r,c,m2(r,c+1));
+               m2.set(r,100,a);
+       }
+       for (unsigned r=0; r<=n*n; ++r)
+               for (unsigned c=0; c<=n*n; ++c)
+                       if (!m(r,c).is_zero())
+                               m2.set(r,c,m(r,c));
+       
+       symbol lambda("lambda");
+       ex cp = m2.charpoly(lambda);
+       
+       if (cp.coeff(lambda,0) != numeric("140816284877507872414776")) {
+               clog << "characteristic polynomial miscalculated as " << cp << endl;
+               return 1;
+       }
+       return 0;
 }
 
-unsigned time_lw_Qprime(void)
+unsigned time_lw_Qprime()
 {
-    unsigned result = 0;
-    unsigned count = 0;
-    timer rolex;
-    double time = .0;
-    
-    cout << "timing Lewis-Wester test Q' (charpoly(P'))" << flush;
-    clog << "-------Lewis-Wester test Q' (charpoly(P'))" << endl;
-    
-    rolex.start();
-    // correct for very small times:
-    do {
-        result = test();
-        ++count;
-    } while ((time=rolex.read())<0.1 && !result);
-    cout << '.' << flush;
-    
-    if (!result) {
-        cout << " passed ";
-        clog << "(no output)" << endl;
-    } else {
-        cout << " failed ";
-    }
-    cout << int(1000*(time/count))*0.001 << 's' << endl;
-    
-    return result;
+       unsigned result = 0;
+       unsigned count = 0;
+       timer rolex;
+       double time = .0;
+       
+       cout << "timing Lewis-Wester test Q' (charpoly(P'))" << flush;
+       clog << "-------Lewis-Wester test Q' (charpoly(P')):" << endl;
+       
+       if (do_test) {
+               rolex.start();
+               // correct for very small times:
+               do {
+                       result = test();
+                       ++count;
+               } while ((time=rolex.read())<0.1 && !result);
+               cout << '.' << flush;
+               
+               if (!result) {
+                       cout << " passed ";
+                       clog << "(no output)" << endl;
+               } else {
+                       cout << " failed ";
+               }
+               cout << int(1000*(time/count))*0.001 << 's' << endl;
+       } else {
+               cout << " disabled" << endl;
+               clog << "(no output)" << endl;
+       }
+       
+       return result;
 }