Virgin import of diffutils 2.8.7.

1 files changed, 87 insertions, 0 deletions

diff --git a/contrib/diff/lib/xalloc.h b/contrib/diff/lib/xalloc.h
new file mode 100644
index 0000000..4b65858
--- /dev/null
+++ b/contrib/diff/lib/xalloc.h
@@ -0,0 +1,87 @@
+/* xalloc.h -- malloc with out-of-memory checking
+
+   Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+   1999, 2000, 2003 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#ifndef XALLOC_H_
+# define XALLOC_H_
+
+# include <stddef.h>
+
+# 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
+
+/* If this pointer is non-zero, run the specified function upon each
+   allocation failure.  It is initialized to zero. */
+extern void (*xalloc_fail_func) (void);
+
+/* If XALLOC_FAIL_FUNC is undefined or a function that returns, this
+   message is output.  It is translated via gettext.
+   Its value is "memory exhausted".  */
+extern char const xalloc_msg_memory_exhausted[];
+
+/* This function is always triggered when memory is exhausted.  It is
+   in charge of honoring the two previous items.  It exits with status
+   exit_failure (defined in exitfail.h).  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 *xclone (void const *p, size_t s);
+char *xstrdup (const char *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))
+
+/* These macros are deprecated; they will go away soon, and are retained
+   temporarily only to ease conversion to the functions described above.  */
+# define CCLONE(p, n) xclone (p, (n) * sizeof *(p))
+# define CLONE(p) xclone (p, sizeof *(p))
+# define NEW(type, var) type *var = xmalloc (sizeof (type))
+# define XCALLOC(type, n) xcalloc (n, sizeof (type))
+# define XMALLOC(type, n) xnmalloc (n, sizeof (type))
+# define XREALLOC(p, type, n) xnrealloc (p, n, sizeof (type))
+# define XFREE(p) free (p)
+
+#endif /* !XALLOC_H_ */