geqr2.hpp

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//
// Copyright (c) 2021-2023, University of Colorado Denver. All rights reserved.
//
// This file is part of <T>LAPACK.
// <T>LAPACK is free software: you can redistribute it and/or modify it under
// the terms of the BSD 3-Clause license. See the accompanying LICENSE file.
 
#ifndef TLAPACK_LEGACY_GEQR2_HH
#define TLAPACK_LEGACY_GEQR2_HH
 
#include "tlapack/lapack/geqr2.hpp"
 
namespace tlapack {
namespace legacy {
 
    template <typename TA, typename TT>
    int geqr2(idx_t m, idx_t n, TA* A, idx_t lda, TT* tau)
    {
        using internal::create_matrix;
        using internal::create_vector;
 
        // check arguments
        tlapack_check_false(m < 0);
        tlapack_check_false(n < 0);
        tlapack_check_false(lda < m);
 
        // quick return
        if (n <= 0) return 0;
 
        // Matrix views
        auto A_ = create_matrix(A, m, n, lda);
        auto tau_ = create_vector(tau, min(m, n));
 
        return geqr2(A_, tau_);
    }
 
}  // namespace legacy
}  // namespace tlapack
 
#endif  // TLAPACK_LEGACY_GEQR2_HH