Ryan Henry
0d22946a0e
Ship the TLS mesh, composer, Beaver/Yao/leaf MPC, prep/online paths, apps, and docs so the tree is pushable before elevating share_expr, security_mode, and prep resume. Co-authored-by: Cursor <cursoragent@cursor.com>
69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
/// @file grotto/gadgets/elementary/boxcar.hpp
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/// @author Ryan Henry <ryan.henry@ucalgary.ca>
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/// @brief Cleartext reference for `boxcar`.
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/// @copyright Copyright (c) 2019-2023 Ryan Henry and others
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/// @license Released under a GNU General Public v2.0 (GPLv2) license;
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/// see [LICENSE.md](@ref license) for details.
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#ifndef LIBDPF_INCLUDE_GROTTO_GADGETS_ELEMENTARY_BOXCAR_HPP__
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#define LIBDPF_INCLUDE_GROTTO_GADGETS_ELEMENTARY_BOXCAR_HPP__
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#include <array>
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#include <limits>
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#include "grotto/gadget_hints.hpp"
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namespace grotto
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{
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namespace gadgets
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{
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static constexpr double boxcar_default_outside = 0;
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static constexpr double boxcar_default_inside = 1;
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/// @brief Cleartext `boxcar`.
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/// @see grotto::make_interval_lut
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/// @tparam inside functor parameter (a `double` bound or scale)
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/// @tparam outside functor parameter (a `double` bound or scale)
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/// @tparam to functor parameter (a `double` bound or scale)
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/// @tparam from functor parameter (a `double` bound or scale)
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/// @note Straight-line cleartext. Fixed-point evaluation is the symbol in `@see` when that symbol is a LUT or an `eval_*` function.
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/// \complexity One evaluation of `operator()` as written in this header. There is no domain scan and no loop. `Θ(1)` time and extra space relative to that expression.
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template <double const & from,
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double const & to,
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double const & outside = boxcar_default_outside,
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double const & inside = boxcar_default_inside>
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struct boxcar
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{
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/// @brief Evaluate the cleartext map.
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/// @tparam T argument and result type
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/// @param x the input
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/// @return the cleartext image of `x`
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/// \complexity The body is straight-line. `Θ(1)` time and extra space.
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template <typename T>
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T operator()(T x) { return (x < from || x > to) ? outside : inside; }
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};
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template <double const & from,
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double const & to,
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double const & outside,
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double const & inside>
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struct gadget_hints<boxcar<from, to, inside, outside>>
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{
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static constexpr double min = std::numeric_limits<double>::min();
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static constexpr double max = std::numeric_limits<double>::max();
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static constexpr unsigned degree = 0;
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static constexpr double poles[] = { };
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static constexpr bool has_canonical_representation = true;
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static constexpr double interesting_points[] = { from, to };
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static constexpr double canonical_bounds[] = { from, to };
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static constexpr std::array<double, degree+1> canonical_polys[] = { outside, inside, outside };
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};
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} // namespace gadgets
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} // namespace grotto
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#endif // LIBDPF_INCLUDE_GROTTO_GADGETS_ELEMENTARY_BOXCAR_HPP__
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