33 lines
1.7 KiB
C++
33 lines
1.7 KiB
C++
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#include "serif/solver/linear/linear.hpp"
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#include <algorithm>
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#include <cmath>
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#include <stdexcept>
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#include "serif/utils/error/errors.hpp"
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namespace serif::solver::linear {
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void Control::validate() const {
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utils::errors::serif_ensure<utils::errors::SERiFErrorCode::SOLVER_ERROR, std::invalid_argument>(
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std::isfinite(relative_tolerance) && relative_tolerance >= 0.0 &&
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std::isfinite(absolute_tolerance) && absolute_tolerance >= 0.0 && maximum_iterations > 0,
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"A linear solve needs finite nonnegative tolerances and a positive iteration budget; received {}, {}, and {}.",
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relative_tolerance, absolute_tolerance, maximum_iterations);
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}
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double Control::convergence_threshold(double right_hand_side_norm) const {
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validate();
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const double relative_threshold = relative_tolerance * right_hand_side_norm;
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utils::errors::serif_ensure<utils::errors::SERiFErrorCode::SOLVER_ERROR, std::invalid_argument>(
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std::isfinite(right_hand_side_norm) && right_hand_side_norm >= 0.0 && std::isfinite(relative_threshold),
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"A linear convergence threshold needs a finite nonnegative right-hand-side norm and finite product with the relative tolerance; received {}.",
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right_hand_side_norm);
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return std::max(absolute_tolerance, relative_threshold);
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}
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void FGMRES::validate() const {
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utils::errors::serif_ensure<utils::errors::SERiFErrorCode::SOLVER_ERROR, std::invalid_argument>(
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restart_length > 0 && print_level >= -1 && print_level <= 3,
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"FGMRES needs a positive restart length and print level between -1 and 3; received {} and {}.", restart_length, print_level);
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}
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}
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