1 /*
2 Copyright (C) 2018 Daniel Schultz
3
4 This file is part of FLINT.
5
6 FLINT is free software: you can redistribute it and/or modify it under
7 the terms of the GNU Lesser General Public License (LGPL) as published
8 by the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version. See <http://www.gnu.org/licenses/>.
10 */
11
12 #include "fmpz_mpoly.h"
13
fmpz_mpoly_get_coeff_fmpz_monomial(fmpz_t c,const fmpz_mpoly_t A,const fmpz_mpoly_t M,const fmpz_mpoly_ctx_t ctx)14 void fmpz_mpoly_get_coeff_fmpz_monomial(fmpz_t c, const fmpz_mpoly_t A,
15 const fmpz_mpoly_t M, const fmpz_mpoly_ctx_t ctx)
16 {
17 slong index;
18
19 if (M->length != WORD(1))
20 {
21 flint_throw(FLINT_ERROR, "M not monomial in fmpz_mpoly_get_coeff_fmpz_monomial");
22 }
23
24 index = mpoly_monomial_index_monomial(A->exps, A->bits, A->length,
25 M->exps, M->bits, ctx->minfo);
26 if (index < 0)
27 {
28 fmpz_zero(c);
29 }
30 else
31 {
32 FLINT_ASSERT(index < A->length);
33 fmpz_set(c, A->coeffs + index);
34 }
35 }
36