1 /* Test for correct rounding of negative floating-point numbers by scanf
2 (bug 23280).
3 Copyright (C) 2018-2022 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20 #include <fenv.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <support/check.h>
24
25 static int
do_test(void)26 do_test (void)
27 {
28 #ifdef FE_DOWNWARD
29 if (fesetround (FE_DOWNWARD) == 0)
30 {
31 double a = strtod ("-0.1", NULL);
32 double b = 0;
33 int r = sscanf ("-0.1", "%lf", &b);
34 TEST_VERIFY (r == 1);
35 TEST_VERIFY (a == b);
36 }
37 #endif
38 #ifdef FE_UPWARD
39 if (fesetround (FE_UPWARD) == 0)
40 {
41 double a = strtod ("-0.1", NULL);
42 double b = 0;
43 int r = sscanf ("-0.1", "%lf", &b);
44 TEST_VERIFY (r == 1);
45 TEST_VERIFY (a == b);
46 }
47 #endif
48 return 0;
49 }
50
51 #include <support/test-driver.c>
52