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/*
Copyright (C) 2020 Fredrik Johansson
This file is part of Calcium.
Calcium 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 <http://www.gnu.org/licenses/>.
*/
#include "ca.h"
void
ca_set(ca_t res, const ca_t x, ca_ctx_t ctx)
{
if (res != x)
{
ulong field_flags;
ca_field_srcptr field;
field_flags = x->field;
field = (ca_field_srcptr) (x->field & ~CA_SPECIAL);
/* for Undefined, Unknown, UnsignedInfinity */
if (field == NULL)
{
ca_clear(res, ctx);
res->field = field_flags;
return;
}
_ca_make_field_element(res, field, ctx);
res->field = field_flags; /* set special flags */
if (field != NULL)
{
if (CA_FIELD_IS_QQ(field))
{
fmpq_set(CA_FMPQ(res), CA_FMPQ(x));
}
else if (CA_FIELD_IS_NF(field))
{
nf_elem_set(CA_NF_ELEM(res), CA_NF_ELEM(x), CA_FIELD_NF(field));
}
else
{
fmpz_mpoly_q_set(CA_MPOLY_Q(res), CA_MPOLY_Q(x), CA_FIELD_MCTX(field, ctx));
}
}
}
}
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