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/*
Copyright (C) 2021 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 "fexpr.h"
#include "fexpr_builtin.h"
void
fexpr_set_fmpq(fexpr_t res, const fmpq_t x)
{
if (fmpz_is_one(fmpq_denref(x)))
{
fexpr_set_fmpz(res, fmpq_numref(x));
}
else
{
slong p, q;
p = *fmpq_numref(x);
q = *fmpq_denref(x);
if (p >= FEXPR_COEFF_MIN && p <= FEXPR_COEFF_MAX &&
q >= FEXPR_COEFF_MIN && q <= FEXPR_COEFF_MAX)
{
fexpr_fit_size(res, 4);
res->data[0] = FEXPR_TYPE_CALL2 | (4 << FEXPR_TYPE_BITS);
res->data[1] = FEXPR_SYMBOL_Div;
res->data[2] = p << FEXPR_TYPE_BITS;
res->data[3] = q << FEXPR_TYPE_BITS;
}
else /* todo: copy directly without temporaries */
{
fexpr_t a, b;
fexpr_init(a);
fexpr_init(b);
fexpr_set_fmpz(a, fmpq_numref(x));
fexpr_set_fmpz(b, fmpq_denref(x));
fexpr_div(res, a, b);
fexpr_clear(a);
fexpr_clear(b);
}
}
}
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