1 files changed, 59 insertions, 0 deletions
diff --git a/btl/accuracy/sizes.hh b/btl/accuracy/sizes.hh
new file mode 100644
index 0000000..be458bf
--- /dev/null
+++ b/btl/accuracy/sizes.hh
@@ -0,0 +1,59 @@
+//=====================================================
+// Copyright (C) 2011 Andrea Arteaga <andyspiros@gmail.com>
+//=====================================================
+//
+// 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.
+//
+#ifndef SIZES_HH
+#define SIZES_HH
+
+#include <vector>
+#include <cmath>
+
+template<typename T>
+std::vector<T> logspace(const T& min, const T& max, const unsigned& N)
+{
+        std::vector<T> result;
+        result.reserve(N);
+
+        const double emin = std::log(static_cast<double>(min)),
+                     emax = std::log(static_cast<double>(max));
+        double e, r = (emax-emin)/(N-1);
+        for (unsigned i = 0; i < N; ++i) {
+                e = emin + i*r;
+                result.push_back(static_cast<T>(exp(e)));
+        }
+
+        return result;
+}
+
+template<typename T>
+std::vector<T> logsizes(const T& min, const T& max, const unsigned& N)
+{
+        if (N <= 10)
+                return logspace(min, max, N);
+
+        std::vector<T> result;
+        result.reserve(N);
+
+        for (unsigned i = 0; i < 9; ++i)
+                result.push_back(i+1);
+        std::vector<T> lres = logspace(10, max, N-9);
+        for (unsigned i = 9; i < N; ++i)
+                result.push_back(lres[i-9]);
+
+        return result;
+}
+
+#endif /* SIZES_HH */