Added thirdparty: boost library

thirdparty/include/boost/histogram/detail/normal.hpp

@@ -0,0 +1,29 @@
+// Copyright 2022 Hans Dembinski, Jay Gohil
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt
+// or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_HISTOGRAM_DETAIL_NORMAL_HPP
+#define BOOST_HISTOGRAM_DETAIL_NORMAL_HPP
+
+#include <boost/histogram/detail/erf_inv.hpp>
+#include <cmath>
+
+namespace boost {
+namespace histogram {
+namespace detail {
+
+inline double normal_cdf(double x) noexcept {
+  return std::fma(0.5, std::erf(x / std::sqrt(2)), 0.5);
+}
+
+inline double normal_ppf(double p) noexcept {
+  return std::sqrt(2) * erf_inv(2 * (p - 0.5));
+}
+
+} // namespace detail
+} // namespace histogram
+} // namespace boost
+
+#endif