NOTE: This patch has been committed. The version below is informational only (whitespace differences have been removed). ChangeLog addition: 2006-01-10 Didier Verna &lt;didier(a)lrde.epita.fr&gt; * 2.0/src/oo/c++/Makefile: New. * 2.0/src/oo/c++/oo_cpp.cc: Avoid using unsigned. Add checks for dynamic_cast NULL return value. Provide command-line arguments for size and steps (defaulting to 800x800 and 200). GSC source patch: Diff command: svn diff --diff-cmd /usr/bin/diff -x "-u -t -b -B -w" Files affected: 2.0/src/oo/c++/oo_cpp.cc 2.0/src/oo/c++/Makefile Index: 2.0/src/oo/c++/Makefile =================================================================== --- 2.0/src/oo/c++/Makefile (revision 0) +++ 2.0/src/oo/c++/Makefile (revision 0) @@ -0,0 +1,5 @@ +CXX = g++ +CPPFLAGS = -DNDEBUG +CXXFLAGS = -Wall -W -O3 + +all: oo_cpp Index: 2.0/src/oo/c++/oo_cpp.cc =================================================================== --- 2.0/src/oo/c++/oo_cpp.cc (revision 46) +++ 2.0/src/oo/c++/oo_cpp.cc (working copy) @@ -24,6 +24,7 @@ virtual value& assign(const value& rhs) { const integer* rhs_ = dynamic_cast<const integer*>(&rhs); + if (rhs_ != NULL) value_ = rhs_->value_; return *this; } @@ -47,17 +48,17 @@ class point1d : public point { public: - point1d(unsigned i = 0) : + point1d(int i = 0) : i_(i) { } virtual ~point1d() {} - unsigned index() const { return i_; } - unsigned& index() { return i_; } + int index() const { return i_; } + int& index() { return i_; } private: - unsigned i_; + int i_; }; @@ -79,7 +80,7 @@ class piter1d : public piter { public: - piter1d(unsigned n) : + piter1d(int n) : n_(n) { } @@ -100,7 +101,7 @@ return p_; } private: - unsigned n_; + int n_; point1d p_; }; @@ -122,7 +123,7 @@ class image1d : public image { public: - image1d(unsigned n) : + image1d(int n) : n_(n) { data_ = new T[n_]; @@ -130,6 +131,8 @@ value& operator[](const point& p) { const point1d* p_ = dynamic_cast<const point1d*>(&p); + if (p_ == NULL) + return data_[0]; // Silly return, just to perform the dyncast check. return data_[p_->index()]; } piter& new_piter() @@ -137,7 +140,7 @@ return *new piter1d(n_); } private: - unsigned n_; + int n_; T* data_; }; @@ -160,24 +163,29 @@ void usage(char* argv[]) { - std::cout << "usage: " << argv[0] << " [nsteps = 1]" << std::endl; + std::cout << "usage: " << argv[0] << " [size = 800] [nsteps = 1]" + << std::endl; exit(1); } int main(int argc, char* argv[]) { - if (argc > 2) + if (argc > 3) usage(argv); - const unsigned size = 1024 * 1024; - const unsigned nsteps = argc == 2 ? atoi(argv[1]) : 1; + const int size = argc > 1 ? atoi (argv[1]) : 800; + const int nsteps = argc > 2 ? atoi (argv[2]) : 200; - image1d<integer> ima(size); + std::cout << size << "x" << size << " / " << nsteps << " steps:" + << std::endl; + + image1d<integer> ima(size * size); integer val = 51; float t0 = (float)clock(); - for (unsigned step = 0; step < nsteps; ++step) + for (int step = 0; step < nsteps; ++step) assign(ima, val); - std::cout << (clock() - t0) / CLOCKS_PER_SEC << std::endl; + float t1 = (float)clock(); + std::cout << (t1 - t0) / CLOCKS_PER_SEC << std::endl; } -- Didier Verna, didier(a)lrde.epita.fr, http://www.lrde.epita.fr/~didier EPITA / LRDE, 14-16 rue Voltaire Tel.+33 (1) 44 08 01 85 94276 Le Kremlin-Bicêtre, France Fax.+33 (1) 53 14 59 22 didier(a)xemacs.org