[Olena-patches] cleanup-2008 2245: Add an 'estim nsites' routine for Z.

https://svn.lrde.epita.fr/svn/oln/branches/cleanup-2008/milena Index: ChangeLog from Thierry Geraud &lt;thierry.geraud(a)lrde.epita.fr&gt; Add an 'estim nsites' routine for Z. * doc/tutorial/examples/image2d.cc: Augment. * mln/estim/nsites.hh: New. doc/tutorial/examples/image2d.cc | 6 - mln/estim/nsites.hh | 178 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 182 insertions(+), 2 deletions(-) Index: doc/tutorial/examples/image2d.cc --- doc/tutorial/examples/image2d.cc (revision 2244) +++ doc/tutorial/examples/image2d.cc (working copy) @@ -6,6 +6,7 @@ # include <mln/debug/println.hh> # include <mln/core/alias/neighb2d.hh> +# include <mln/estim/nsites.hh> template <typename I, typename W, typename P> @@ -34,16 +35,17 @@ } - int main() { using namespace mln; typedef image2d<unsigned> I; I ima(2, 3, 0); // no border + debug::iota(ima); debug::println(ima); - mln_invariant(ima.nsites() == 6); + mln_assertion(ima.nsites() == 6); + mln_assertion(estim::nsites(ima) == ima.nsites()); window2d win; win Index: mln/estim/nsites.hh --- mln/estim/nsites.hh (revision 0) +++ mln/estim/nsites.hh (revision 0) @@ -0,0 +1,178 @@ +// Copyright (C) 2008 EPITA Research and Development Laboratory +// +// This file is part of the Olena Library. This library is free +// software; you can redistribute it and/or modify it under the terms +// of the GNU General Public License version 2 as published by the +// Free Software Foundation. +// +// This library 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 library; see the file COPYING. If not, write to +// the Free Software Foundation, 51 Franklin Street, Fifth Floor, +// Boston, MA 02111-1307, USA. +// +// As a special exception, you may use this file as part of a free +// software library without restriction. Specifically, if other files +// instantiate templates or use macros or inline functions from this +// file, or you compile this file and link it with other files to +// produce an executable, this file does not by itself cause the +// resulting executable to be covered by the GNU General Public +// License. This exception does not however invalidate any other +// reasons why the executable file might be covered by the GNU General +// Public License. + +#ifndef MLN_ESTIM_NSITES_HH +# define MLN_ESTIM_NSITES_HH + +/*! \file mln/estim/nsites.hh + * + * \brief Compute the number of sites of an image or a site set. + */ + +# include <mln/core/concept/site_set.hh> +# include <mln/core/concept/image.hh> + + +namespace mln +{ + + namespace estim + { + + /// Compute the number of sites of the site set \p input. + template <typename S> + unsigned nsites(const Site_Set<S>& s); + + /// Compute the number of sites of the image \p input. + template <typename I> + unsigned nsites(const Image<I>& input); + + + +# ifndef MLN_INCLUDE_ONLY + + + // Implementations. + + namespace impl + { + + // Generic version. + + namespace generic + { + + template <typename S> + unsigned nsites(const Site_Set<S>& s_) + { + trace::entering("estim::impl::generic::nsites"); + const S& s = exact(s_); + mln_precondition(s.is_valid()); + + unsigned n = 0; + mln_piter(S) p(s); + for_all(p) + ++n; + + trace::exiting("estim::impl::generic::nsites"); + return n; + } + + } // end of namespace mln::estim::impl::generic + + + // A single specialization. + + template <typename S> + inline + unsigned nsites_method(const Site_Set<S>& s) + { + trace::entering("estim::impl::nsites_method"); + unsigned n = exact(s).nsites(); + trace::exiting("estim::impl::nsites_method"); + return n; + } + + } // end of namespace mln::estim::impl + + + + // Dispatch. + + namespace internal + { + + template <typename S> + inline + unsigned nsites_dispatch(mln::trait::site_set::nsites::any, + const Site_Set<S>& s) + { + return impl::generic::nsites(s); + } + + template <typename S> + inline + unsigned nsites_dispatch(mln::trait::site_set::nsites::known, + const Site_Set<S>& s) + { + return impl::nsites_method(s); + } + + // Dispatch facade. + + template <typename S> + inline + unsigned nsites_dispatch(const Site_Set<S>& s) + { + return nsites_dispatch(mln_trait_site_set_nsites(S)(), + s); + } + + } // end of namespace mln::estim::internal + + + + // Facades. + + template <typename S> + inline + unsigned nsites(const Site_Set<S>& s) + { + trace::entering("estim::nsites"); + mln_precondition(exact(s).is_valid()); + + unsigned n = internal::nsites_dispatch(s); + + trace::exiting("estim::nsites"); + return n; + } + + template <typename I> + inline + unsigned nsites(const Image<I>& input_) + { + trace::entering("estim::nsites"); + const I& input = exact(input_); + + mln_precondition(input.has_data()); + mln_precondition(input.domain().is_valid()); + + // Relies on the nsites routines on a site set. + unsigned n = internal::nsites_dispatch(input.domain()); + + trace::exiting("estim::nsites"); + return n; + } + +# endif // ! MLN_INCLUDE_ONLY + + } // end of namespace mln::estim + +} // end of namespace mln + + +#endif // ! MLN_ESTIM_NSITES_HH