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Diffstat (limited to 'lib/xalloc-oversized.h')
-rw-r--r-- | lib/xalloc-oversized.h | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/lib/xalloc-oversized.h b/lib/xalloc-oversized.h deleted file mode 100644 index 67797559..00000000 --- a/lib/xalloc-oversized.h +++ /dev/null @@ -1,38 +0,0 @@ -/* xalloc-oversized.h -- memory allocation size checking - - Copyright (C) 1990-2000, 2003-2004, 2006-2012 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> - -/* 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 an inline function, so that it - works correctly even when SIZE_MAX < N. - - 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)) - -#endif /* !XALLOC_OVERSIZED_H_ */ |