90 lines
2.7 KiB
Diff
90 lines
2.7 KiB
Diff
commit b11db301e162480d1812937ab0410dc7585f423c
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Author: Joe Simmons-Talbott <josimmon@redhat.com>
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Date: Tue Apr 4 09:57:46 2023 -0400
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stdlib: Add testcases for labs(). (BZ #30263)
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Test minimum and maximum long values, zero, and part of the range
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of long values. Use '-fno-builtin' to ensure we are testing the
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implementation.
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Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
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diff --git a/stdlib/Makefile b/stdlib/Makefile
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index 9eb6e1b6ee1df080..2bc09c76ffea39e4 100644
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--- a/stdlib/Makefile
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+++ b/stdlib/Makefile
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@@ -106,6 +106,7 @@ tests := \
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tst-getenv-thread \
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tst-getenv-unsetenv \
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tst-getrandom \
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+ tst-labs \
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tst-limits \
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tst-makecontext \
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tst-makecontext-align \
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@@ -176,6 +177,7 @@ LDFLAGS-test-dlclose-exit-race = $(LDFLAGS-rdynamic)
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LDLIBS-test-dlclose-exit-race-helper.so = $(libsupport) $(shared-thread-library)
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CFLAGS-tst-abs.c += -fno-builtin
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+CFLAGS-tst-labs.c += -fno-builtin
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ifeq ($(have-cxx-thread_local),yes)
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CFLAGS-tst-quick_exit.o = -std=c++11
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diff --git a/stdlib/tst-labs.c b/stdlib/tst-labs.c
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new file mode 100644
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index 0000000000000000..92b456745ac1bb2d
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--- /dev/null
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+++ b/stdlib/tst-labs.c
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@@ -0,0 +1,51 @@
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+/* Basic tests for labs.
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+ Copyright (C) 2023 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <https://www.gnu.org/licenses/>. */
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+
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+#include <limits.h>
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+#include <stdlib.h>
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+
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+#include <support/check.h>
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+
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+#define LARGE_PRIME 49999
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+
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+static int do_test (void)
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+{
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+ long i;
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+
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+ TEST_COMPARE(labs(LONG_MAX), LONG_MAX);
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+ TEST_COMPARE(labs(LONG_MIN + 1), LONG_MAX);
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+ TEST_COMPARE(labs(-1), 1);
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+ TEST_COMPARE(labs(0), 0);
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+ TEST_COMPARE(labs(1), 1);
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+
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+ for (i = LONG_MIN + 1; i < LONG_MIN + INT_MAX; i += LARGE_PRIME)
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+ TEST_COMPARE(labs(i), -i);
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+
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+ for (i = LONG_MAX - INT_MAX; i < LONG_MAX - LARGE_PRIME; i += LARGE_PRIME)
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+ TEST_COMPARE(labs(i), i);
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+
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+ for (i = INT_MIN + 1; i < 0; i += LARGE_PRIME)
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+ TEST_COMPARE(labs(i), -i);
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+
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+ for (i = 0; i < INT_MAX; i += LARGE_PRIME)
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+ TEST_COMPARE(labs(i), i);
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+
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+ return EXIT_SUCCESS;
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+}
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+
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+#include <support/test-driver.c>
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