/* xalloc.h -- malloc with out-of-memory checking   Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,   1999, 2000, 2003, 2004 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 2, 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, write to the Free Software Foundation,   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */#ifndef XALLOC_H_# define XALLOC_H_# include <stddef.h># ifdef __cplusplusextern "C" {# endif# ifndef __attribute__#  if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__#   define __attribute__(x)#  endif# endif# ifndef ATTRIBUTE_NORETURN#  define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))# endif/* This function is always triggered when memory is exhausted.   It must be defined by the application, either explicitly   or by using gnulib's xalloc-die module.  This is the   function to call when one wants the program to die because of a   memory allocation failure.  */extern void xalloc_die (void) ATTRIBUTE_NORETURN;void *xmalloc (size_t s);void *xnmalloc (size_t n, size_t s);void *xzalloc (size_t s);void *xcalloc (size_t n, size_t s);void *xrealloc (void *p, size_t s);void *xnrealloc (void *p, size_t n, size_t s);void *x2realloc (void *p, size_t *pn);void *x2nrealloc (void *p, size_t *pn, size_t s);void *xmemdup (void const *p, size_t s);char *xstrdup (char const *str);/* 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))# ifdef __cplusplus}# endif#endif /* !XALLOC_H_ */