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/*
Copyright (C) 2020 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 "ca.h"
void
ca_erf(ca_t res, const ca_t x, ca_ctx_t ctx)
{
if (CA_IS_SPECIAL(x))
{
/* todo: other signed infinities */
if (ca_check_is_pos_inf(x, ctx) == T_TRUE)
ca_one(res, ctx);
else if (ca_check_is_neg_inf(x, ctx) == T_TRUE)
ca_neg_one(res, ctx);
else if (ca_check_is_pos_i_inf(x, ctx) == T_TRUE)
ca_pos_i_inf(res, ctx);
else if (ca_check_is_neg_i_inf(x, ctx) == T_TRUE)
ca_neg_i_inf(res, ctx);
else if (ca_check_is_undefined(x, ctx) == T_TRUE || ca_check_is_uinf(x, ctx) == T_TRUE)
ca_undefined(res, ctx);
else
ca_unknown(res, ctx);
return;
}
if (ca_check_is_zero(x, ctx) == T_TRUE)
{
ca_zero(res, ctx);
return;
}
_ca_make_field_element(res, _ca_ctx_get_field_fx(ctx, CA_Erf, x), ctx);
fmpz_mpoly_q_gen(CA_MPOLY_Q(res), 0, CA_MCTX_1(ctx));
}