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/*
Copyright (C) 2021 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_transfer(ca_t res, ca_ctx_t res_ctx, const ca_t src, ca_ctx_t src_ctx)
{
if (res_ctx == src_ctx)
{
ca_set(res, src, res_ctx);
}
else if (CA_IS_QQ(src, src_ctx))
{
_ca_make_fmpq(res, res_ctx);
fmpq_set(CA_FMPQ(res), CA_FMPQ(src));
}
else
{
fexpr_t expr;
fexpr_init(expr);
/* todo: optimizations, e.g. direct transfer of number field
elements where permissible */
ca_get_fexpr(expr, src, CA_FEXPR_SERIALIZATION, src_ctx);
if (!ca_set_fexpr(res, expr, res_ctx))
{
flint_throw(FLINT_ERROR, "ca_transfer: failed to recreate from expression!\n");
}
fexpr_clear(expr);
}
}