X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fxmalloc.c;h=08c30fb8a3b7cdcfa0fa903df1bd55417bae5395;hb=cd19e83484e2c0ff9fd68e7439dd97128c6a2703;hp=3adf5dda88f1c4f74683d2860d9d2e283775c8c7;hpb=1d31a1e7121fda63c28ca105309237f6fa98ab80;p=gnulib.git
diff --git a/lib/xmalloc.c b/lib/xmalloc.c
index 3adf5dda8..08c30fb8a 100644
--- a/lib/xmalloc.c
+++ b/lib/xmalloc.c
@@ -1,12 +1,11 @@
/* xmalloc.c -- malloc with out of memory checking
- Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1990-2000, 2002-2006, 2008-2011 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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.
+ 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
@@ -14,63 +13,35 @@
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. */
+ along with this program. If not, see . */
-#if HAVE_CONFIG_H
-# include
-#endif
+#include
+#if ! HAVE_INLINE
+# define static_inline
+#endif
#include "xalloc.h"
+#undef static_inline
#include
-
-#include "gettext.h"
-#define _(msgid) gettext (msgid)
-#define N_(msgid) msgid
-
-#include "error.h"
-#include "exit.h"
-#include "exitfail.h"
-
-/* The following tests require AC_PREREQ(2.54). */
-
-#ifndef HAVE_MALLOC
-"you must run the autoconf test for a GNU libc compatible malloc"
-#endif
-
-#ifndef HAVE_REALLOC
-"you must run the autoconf test for a GNU libc compatible realloc"
+#include
+
+/* 1 if calloc is known to be compatible with GNU calloc. This
+ matters if we are not also using the calloc module, which defines
+ HAVE_CALLOC_GNU and supports the GNU API even on non-GNU platforms. */
+#if defined HAVE_CALLOC_GNU || (defined __GLIBC__ && !defined __UCLIBC__)
+enum { HAVE_GNU_CALLOC = 1 };
+#else
+enum { HAVE_GNU_CALLOC = 0 };
#endif
-/* If non NULL, call this function when memory is exhausted. */
-void (*xalloc_fail_func) (void) = 0;
-
-/* If XALLOC_FAIL_FUNC is NULL, or does return, display this message
- before exiting when memory is exhausted. Goes through gettext. */
-char const xalloc_msg_memory_exhausted[] = N_("memory exhausted");
-
-void
-xalloc_die (void)
-{
- if (xalloc_fail_func)
- (*xalloc_fail_func) ();
- error (exit_failure, 0, "%s", _(xalloc_msg_memory_exhausted));
- /* The `noreturn' cannot be given to error, since it may return if
- its first argument is 0. To help compilers understand the
- xalloc_die does terminate, call exit. */
- exit (EXIT_FAILURE);
-}
-
/* Allocate N bytes of memory dynamically, with error checking. */
void *
xmalloc (size_t n)
{
- void *p;
-
- p = malloc (n);
- if (p == 0)
+ void *p = malloc (n);
+ if (!p && n != 0)
xalloc_die ();
return p;
}
@@ -81,21 +52,73 @@ xmalloc (size_t n)
void *
xrealloc (void *p, size_t n)
{
+ if (!n && p)
+ {
+ /* The GNU and C99 realloc behaviors disagree here. Act like
+ GNU, even if the underlying realloc is C99. */
+ free (p);
+ return NULL;
+ }
+
p = realloc (p, n);
- if (p == 0)
+ if (!p && n)
xalloc_die ();
return p;
}
-/* Allocate memory for N elements of S bytes, with error checking. */
+/* If P is null, allocate a block of at least *PN bytes; otherwise,
+ reallocate P so that it contains more than *PN bytes. *PN must be
+ nonzero unless P is null. Set *PN to the new block's size, and
+ return the pointer to the new block. *PN is never set to zero, and
+ the returned pointer is never null. */
+
+void *
+x2realloc (void *p, size_t *pn)
+{
+ return x2nrealloc (p, pn, 1);
+}
+
+/* Allocate S bytes of zeroed memory dynamically, with error checking.
+ There's no need for xnzalloc (N, S), since it would be equivalent
+ to xcalloc (N, S). */
+
+void *
+xzalloc (size_t s)
+{
+ return memset (xmalloc (s), 0, s);
+}
+
+/* Allocate zeroed memory for N elements of S bytes, with error
+ checking. S must be nonzero. */
void *
xcalloc (size_t n, size_t s)
{
void *p;
-
- p = calloc (n, s);
- if (p == 0)
+ /* Test for overflow, since some calloc implementations don't have
+ proper overflow checks. But omit overflow and size-zero tests if
+ HAVE_GNU_CALLOC, since GNU calloc catches overflow and never
+ returns NULL if successful. */
+ if ((! HAVE_GNU_CALLOC && xalloc_oversized (n, s))
+ || (! (p = calloc (n, s)) && (HAVE_GNU_CALLOC || n != 0)))
xalloc_die ();
return p;
}
+
+/* Clone an object P of size S, with error checking. There's no need
+ for xnmemdup (P, N, S), since xmemdup (P, N * S) works without any
+ need for an arithmetic overflow check. */
+
+void *
+xmemdup (void const *p, size_t s)
+{
+ return memcpy (xmalloc (s), p, s);
+}
+
+/* Clone STRING. */
+
+char *
+xstrdup (char const *string)
+{
+ return xmemdup (string, strlen (string) + 1);
+}