| 1 | /* Basic tests for llabs. |
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| 2 | Copyright (C) 2023-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <limits.h> |
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| 20 | #include <stdlib.h> |
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| 21 | |
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| 22 | #include <support/check.h> |
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| 23 | |
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| 24 | #define LARGE_PRIME 49999 |
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| 25 | |
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| 26 | static int do_test (void) |
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| 27 | { |
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| 28 | long long int i; |
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| 29 | |
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| 30 | TEST_COMPARE (llabs (LLONG_MAX), LLONG_MAX); |
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| 31 | TEST_COMPARE (llabs (LLONG_MIN + 1), LLONG_MAX); |
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| 32 | TEST_COMPARE (llabs (0x00000000ffffffffL), 0x00000000ffffffffL); |
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| 33 | TEST_COMPARE (llabs (0x0000000100000000L), 0x0000000100000000L); |
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| 34 | TEST_COMPARE (llabs (0x80000000ffffffffL), 0x7fffffff00000001L); |
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| 35 | TEST_COMPARE (llabs (0x8000000100000000L), 0x7fffffff00000000L); |
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| 36 | TEST_COMPARE (llabs (-1), 1); |
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| 37 | TEST_COMPARE (llabs (0), 0); |
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| 38 | TEST_COMPARE (llabs (1), 1); |
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| 39 | |
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| 40 | for (i = LLONG_MIN + 1; i < LLONG_MIN + INT_MAX; i += LARGE_PRIME) |
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| 41 | TEST_COMPARE (llabs (i), -i); |
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| 42 | |
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| 43 | for (i = LLONG_MAX - INT_MAX; i < LLONG_MAX - LARGE_PRIME; i += LARGE_PRIME) |
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| 44 | TEST_COMPARE (llabs (i), i); |
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| 45 | |
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| 46 | for (i = INT_MIN + 1; i < 0; i += LARGE_PRIME) |
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| 47 | TEST_COMPARE (llabs (i), -i); |
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| 48 | |
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| 49 | for (i = 0; i < INT_MAX; i += LARGE_PRIME) |
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| 50 | TEST_COMPARE (llabs (i), i); |
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| 51 | |
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| 52 | return EXIT_SUCCESS; |
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| 53 | } |
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| 54 | |
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| 55 | #include <support/test-driver.c> |
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| 56 | |
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