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/*
Copyright (C) 2024 Jean Kieffer
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 "acb.h"
#include "acb_mat.h"
#include "acb_theta.h"
void
acb_siegel_randtest_compact(acb_mat_t tau, flint_rand_t state, int exact, slong prec)
{
slong g = acb_mat_nrows(tau);
slong bits = n_randint(state, 4);
arb_t y;
slong j, k;
int res;
arb_init(y);
res = 0;
while(!res)
{
acb_siegel_randtest_reduced(tau, state, prec, bits);
arb_sub_si(y, acb_imagref(acb_mat_entry(tau, g - 1, g - 1)), 4, prec);
res = arb_is_negative(y);
}
if (exact)
{
for (j = 0; j < g; j++)
{
for (k = j; k < g; k++)
{
acb_get_mid(acb_mat_entry(tau, j, k), acb_mat_entry(tau, j, k));
acb_set(acb_mat_entry(tau, k, j), acb_mat_entry(tau, j, k));
}
}
}
arb_clear(y);
}