1 /* 2 Copyright (C) 2019 Fredrik Johansson 3 4 This file is part of Arb. 5 6 Arb is free software: you can redistribute it and/or modify it under 7 the terms of the GNU Lesser General Public License (LGPL) as published 8 by the Free Software Foundation; either version 2.1 of the License, or 9 (at your option) any later version. See <http://www.gnu.org/licenses/>. 10 */ 11 12 #include "arb.h" 13 14 int arb_sgn_nonzero(const arb_t x)15arb_sgn_nonzero(const arb_t x) 16 { 17 if (arb_is_positive(x)) 18 return 1; 19 else if (arb_is_negative(x)) 20 return -1; 21 else 22 return 0; 23 } 24