/*
    Copyright (C) 2018, 2019 Daniel Schultz

    This file is part of FLINT.

    FLINT is free software: you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License (LGPL) as published
    by the Free Software Foundation; either version 2.1 of the License, or
    (at your option) any later version.  See <https://www.gnu.org/licenses/>.
*/

#include "nmod_mpoly.h"

ulong nmod_mpoly_get_coeff_ui_monomial(const nmod_mpoly_t A,
                             const nmod_mpoly_t M, const nmod_mpoly_ctx_t ctx)
{
    slong index;

    if (M->length != WORD(1))
    {
        flint_throw(FLINT_ERROR, "M not monomial in nmod_mpoly_get_coeff_ui_monomial");
    }

    index = mpoly_monomial_index_monomial(A->exps, A->bits, A->length,
                                                 M->exps, M->bits, ctx->minfo);
    if (index < 0)
    {
        return 0;
    }
    else
    {
        FLINT_ASSERT(index < A->length);
        return A->coeffs[index];
    }
}