diff options
| -rw-r--r-- | stdlib/Makefile | 2 | ||||
| -rw-r--r-- | stdlib/tst-labs.c | 51 |
2 files changed, 53 insertions, 0 deletions
diff --git a/stdlib/Makefile b/stdlib/Makefile index 2a50822774..0f58a6b62d 100644 --- a/stdlib/Makefile +++ b/stdlib/Makefile @@ -198,6 +198,7 @@ tests := \ tst-cxa_atexit \ tst-environ \ tst-getrandom \ + tst-labs \ tst-limits \ tst-makecontext \ tst-makecontext-align \ @@ -289,6 +290,7 @@ LDFLAGS-test-dlclose-exit-race = $(LDFLAGS-rdynamic) LDLIBS-test-dlclose-exit-race-helper.so = $(libsupport) $(shared-thread-library) CFLAGS-tst-abs.c += -fno-builtin +CFLAGS-tst-labs.c += -fno-builtin ifeq ($(have-cxx-thread_local),yes) CFLAGS-tst-quick_exit.o = -std=c++11 diff --git a/stdlib/tst-labs.c b/stdlib/tst-labs.c new file mode 100644 index 0000000000..92b456745a --- /dev/null +++ b/stdlib/tst-labs.c @@ -0,0 +1,51 @@ +/* Basic tests for labs. + 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(labs(LONG_MAX), LONG_MAX); + TEST_COMPARE(labs(LONG_MIN + 1), LONG_MAX); + TEST_COMPARE(labs(-1), 1); + TEST_COMPARE(labs(0), 0); + TEST_COMPARE(labs(1), 1); + + for (i = LONG_MIN + 1; i < LONG_MIN + INT_MAX; i += LARGE_PRIME) + TEST_COMPARE(labs(i), -i); + + for (i = LONG_MAX - INT_MAX; i < LONG_MAX - LARGE_PRIME; i += LARGE_PRIME) + TEST_COMPARE(labs(i), i); + + for (i = INT_MIN + 1; i < 0; i += LARGE_PRIME) + TEST_COMPARE(labs(i), -i); + + for (i = 0; i < INT_MAX; i += LARGE_PRIME) + TEST_COMPARE(labs(i), i); + + return EXIT_SUCCESS; +} + +#include <support/test-driver.c> |