1 /*
2 Copyright (C) 2016 William Hart
3 Copyright (C) 2018 Daniel Schultz
4
5 This file is part of FLINT.
6
7 FLINT is free software: you can redistribute it and/or modify it under
8 the terms of the GNU Lesser General Public License (LGPL) as published
9 by the Free Software Foundation; either version 2.1 of the License, or
10 (at your option) any later version. See <http://www.gnu.org/licenses/>.
11 */
12
13 #include "fmpz_mpoly.h"
14
fmpz_mpoly_neg(fmpz_mpoly_t A,const fmpz_mpoly_t B,const fmpz_mpoly_ctx_t ctx)15 void fmpz_mpoly_neg(fmpz_mpoly_t A, const fmpz_mpoly_t B,
16 const fmpz_mpoly_ctx_t ctx)
17 {
18 slong N;
19
20 if (A != B)
21 {
22 N = mpoly_words_per_exp(B->bits, ctx->minfo);
23 fmpz_mpoly_fit_length(A, B->length, ctx);
24 fmpz_mpoly_fit_bits(A, B->bits, ctx);
25 A->bits = B->bits;
26 mpn_copyi(A->exps, B->exps, N*B->length);
27 }
28 _fmpz_vec_neg(A->coeffs, B->coeffs, B->length);
29 _fmpz_mpoly_set_length(A, B->length, ctx);
30 }
31