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-rw-r--r--tests/xalloc-oversized.h63
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diff --git a/tests/xalloc-oversized.h b/tests/xalloc-oversized.h
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--- a/tests/xalloc-oversized.h
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-/* xalloc-oversized.h -- memory allocation size checking
-
- Copyright (C) 1990-2000, 2003-2004, 2006-2016 Free Software Foundation, Inc.
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- This program 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
-
-#ifndef XALLOC_OVERSIZED_H_
-#define XALLOC_OVERSIZED_H_
-
-#include <stddef.h>
-
-/* Default for (non-Clang) compilers that lack __has_builtin. */
-#ifndef __has_builtin
-# define __has_builtin(x) 0
-#endif
-
-/* True if N * S would overflow in a size calculation.
- This expands to a constant expression if N and S are both constants.
- By gnulib convention, SIZE_MAX represents overflow in size
- calculations, so the conservative dividend to use here is
- SIZE_MAX - 1, since SIZE_MAX might represent an overflowed value.
- However, malloc (SIZE_MAX) fails on all known hosts where
- sizeof (ptrdiff_t) <= sizeof (size_t), so do not bother to test for
- exactly-SIZE_MAX allocations on such hosts; this avoids a test and
- branch when S is known to be 1. */
-#define __xalloc_oversized(n, s) \
- ((size_t) (sizeof (ptrdiff_t) <= sizeof (size_t) ? -1 : -2) / (s) < (n))
-
-
-/* Return 1 if an array of N objects, each of size S, cannot exist due
- to size arithmetic overflow. S must be positive and N must be
- nonnegative. This is a macro, not a function, so that it
- works correctly even when SIZE_MAX < N. */
-
-#if 7 <= __GNUC__ || __has_builtin (__builtin_add_overflow_p)
-# define xalloc_oversized(n, s) __builtin_mul_overflow_p (n, s, (size_t) 1)
-#elif ((5 <= __GNUC__ \
- || (__has_builtin (__builtin_mul_overflow) \
- && __has_builtin (__builtin_constant_p))) \
- && !__STRICT_ANSI__)
-# define xalloc_oversized(n, s) \
- (__builtin_constant_p (n) && __builtin_constant_p (s) \
- ? __xalloc_oversized (n, s) \
- : ({ size_t __xalloc_size; __builtin_mul_overflow (n, s, &__xalloc_size); }))
-
-/* Other compilers use integer division; this may be slower but is
- more portable. */
-#else
-# define xalloc_oversized(n, s) __xalloc_oversized (n, s)
-#endif
-
-#endif /* !XALLOC_OVERSIZED_H_ */