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/*
Copyright (C) 2023 Fredrik Johansson
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 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "gr_poly.h"
/* todo: faster code when possible */
truth_t
gr_poly_is_gen(const gr_poly_t poly, gr_ctx_t ctx)
{
gr_ptr tmp;
gr_poly_t gen;
truth_t res;
slong sz = ctx->sizeof_elem;
GR_TMP_INIT_VEC(tmp, 2, ctx);
if (gr_one(GR_ENTRY(tmp, 1, sz), ctx) != GR_SUCCESS)
{
res = T_UNKNOWN;
}
else
{
res = gr_is_zero(GR_ENTRY(tmp, 1, sz), ctx);
if (res != T_UNKNOWN)
{
gen->coeffs = tmp;
gen->length = (res == T_TRUE) ? 0 : 2;
gen->alloc = gen->length;
res = gr_poly_equal(poly, gen, ctx);
}
}
GR_TMP_CLEAR_VEC(tmp, 2, ctx);
return res;
}