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Diffstat (limited to 'stdlib/tst-llabs.c')
| -rw-r--r-- | stdlib/tst-llabs.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/stdlib/tst-llabs.c b/stdlib/tst-llabs.c new file mode 100644 index 0000000..be3cd78 --- /dev/null +++ b/stdlib/tst-llabs.c @@ -0,0 +1,55 @@ +/* Basic tests for llabs. + Copyright (C) 2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#include <limits.h> +#include <stdlib.h> + +#include <support/check.h> + +#define LARGE_PRIME 49999 + +static int do_test (void) +{ + long i; + + TEST_COMPARE(llabs(LLONG_MAX), LLONG_MAX); + TEST_COMPARE(llabs(LLONG_MIN + 1), LLONG_MAX); + TEST_COMPARE(llabs(0x00000000ffffffffL), 0x00000000ffffffffL); + TEST_COMPARE(llabs(0x0000000100000000L), 0x0000000100000000L); + TEST_COMPARE(llabs(0x80000000ffffffffL), 0x7fffffff00000001L); + TEST_COMPARE(llabs(0x8000000100000000L), 0x7fffffff00000000L); + TEST_COMPARE(llabs(-1), 1); + TEST_COMPARE(llabs(0), 0); + TEST_COMPARE(llabs(1), 1); + + for (i = LLONG_MIN + 1; i < LLONG_MIN + INT_MAX; i += LARGE_PRIME) + TEST_COMPARE(llabs(i), -i); + + for (i = LLONG_MAX - INT_MAX; i < LLONG_MAX - LARGE_PRIME; i += LARGE_PRIME) + TEST_COMPARE(llabs(i), i); + + for (i = INT_MIN + 1; i < 0; i += LARGE_PRIME) + TEST_COMPARE(llabs(i), -i); + + for (i = 0; i < INT_MAX; i += LARGE_PRIME) + TEST_COMPARE(llabs(i), i); + + return EXIT_SUCCESS; +} + +#include <support/test-driver.c> |