| 1 | /* Basic tests for abs. |
|---|
| 2 | Copyright (C) 2023-2024 Free Software Foundation, Inc. |
|---|
| 3 | This file is part of the GNU C Library. |
|---|
| 4 | |
|---|
| 5 | The GNU C Library is free software; you can redistribute it and/or |
|---|
| 6 | modify it under the terms of the GNU Lesser General Public |
|---|
| 7 | License as published by the Free Software Foundation; either |
|---|
| 8 | version 2.1 of the License, or (at your option) any later version. |
|---|
| 9 | |
|---|
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
|---|
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
|---|
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|---|
| 13 | Lesser General Public License for more details. |
|---|
| 14 | |
|---|
| 15 | You should have received a copy of the GNU Lesser General Public |
|---|
| 16 | License along with the GNU C Library; if not, see |
|---|
| 17 | <https://www.gnu.org/licenses/>. */ |
|---|
| 18 | |
|---|
| 19 | #include <limits.h> |
|---|
| 20 | #include <stdlib.h> |
|---|
| 21 | |
|---|
| 22 | #include <support/check.h> |
|---|
| 23 | |
|---|
| 24 | #define LARGE_PRIME 49999 |
|---|
| 25 | |
|---|
| 26 | static int do_test (void) |
|---|
| 27 | { |
|---|
| 28 | int i; |
|---|
| 29 | |
|---|
| 30 | TEST_COMPARE(abs(INT_MAX), INT_MAX); |
|---|
| 31 | TEST_COMPARE(abs(INT_MIN + 1), INT_MAX); |
|---|
| 32 | TEST_COMPARE(abs(-1), 1); |
|---|
| 33 | TEST_COMPARE(abs(0), 0); |
|---|
| 34 | TEST_COMPARE(abs(1), 1); |
|---|
| 35 | |
|---|
| 36 | for (i = INT_MIN + 1; i < 0; i += LARGE_PRIME) |
|---|
| 37 | TEST_COMPARE(abs(i), -i); |
|---|
| 38 | |
|---|
| 39 | for (i = 0; i < INT_MAX - LARGE_PRIME; i += LARGE_PRIME) |
|---|
| 40 | TEST_COMPARE(abs(i), i); |
|---|
| 41 | |
|---|
| 42 | return EXIT_SUCCESS; |
|---|
| 43 | } |
|---|
| 44 | |
|---|
| 45 | #include <support/test-driver.c> |
|---|
| 46 | |
|---|
