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 |
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 | |