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646c2833 JM |
1 | /* Test for correct rounding of negative floating-point numbers by scanf |
2 | (bug 23280). | |
6d7e8eda | 3 | Copyright (C) 2018-2023 Free Software Foundation, Inc. |
646c2833 JM |
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 | |
5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
646c2833 JM |
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> |