X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Frealloc.c;h=0c96ffacbac0d575b1ee3007fa0436b06a34f8ad;hb=551ee6493e89f30ea3d1cc75bcaaa3d5e5fab7e1;hp=18cc6280375e43aa158431f63036156e2030f855;hpb=57fdfd3f8ec62b105c53bcdf6f127c35c7fe7391;p=gnulib.git

diff --git a/lib/realloc.c b/lib/realloc.c
index 18cc62803..0c96ffacb 100644
--- a/lib/realloc.c
+++ b/lib/realloc.c
@@ -1,6 +1,7 @@
 /* realloc() function that is glibc compatible.
 
-   Copyright (C) 1997, 2003, 2004, 2006, 2007 Free Software Foundation, Inc.
+   Copyright (C) 1997, 2003-2004, 2006-2007, 2009-2011 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
@@ -17,22 +18,27 @@
 
 /* written by Jim Meyering and Bruno Haible */
 
+#define _GL_USE_STDLIB_ALLOC 1
 #include <config.h>
+
 /* Only the AC_FUNC_REALLOC macro defines 'realloc' already in config.h.  */
 #ifdef realloc
-# define NEED_REALLOC_GNU
-# undef realloc
+# define NEED_REALLOC_GNU 1
+/* Whereas the gnulib module 'realloc-gnu' defines HAVE_REALLOC_GNU.  */
+#elif GNULIB_REALLOC_GNU && !HAVE_REALLOC_GNU
+# define NEED_REALLOC_GNU 1
+#endif
+
+/* Infer the properties of the system's malloc function.
+   The gnulib module 'malloc-gnu' defines HAVE_MALLOC_GNU.  */
+#if GNULIB_MALLOC_GNU && HAVE_MALLOC_GNU
+# define SYSTEM_MALLOC_GLIBC_COMPATIBLE 1
 #endif
 
-/* Specification.  */
 #include <stdlib.h>
 
 #include <errno.h>
 
-/* Call the system's malloc and realloc below.  */
-#undef malloc
-#undef realloc
-
 /* Change the size of an allocated block of memory P to N bytes,
    with error checking.  If N is zero, change it to 1.  If P is NULL,
    use malloc.  */
@@ -42,7 +48,7 @@ rpl_realloc (void *p, size_t n)
 {
   void *result;
 
-#ifdef NEED_REALLOC_GNU
+#if NEED_REALLOC_GNU
   if (n == 0)
     {
       n = 1;
@@ -53,7 +59,16 @@ rpl_realloc (void *p, size_t n)
     }
 #endif
 
-  result = (p == NULL ? malloc (n) : realloc (p, n));
+  if (p == NULL)
+    {
+#if GNULIB_REALLOC_GNU && !NEED_REALLOC_GNU && !SYSTEM_MALLOC_GLIBC_COMPATIBLE
+      if (n == 0)
+        n = 1;
+#endif
+      result = malloc (n);
+    }
+  else
+    result = realloc (p, n);
 
 #if !HAVE_REALLOC_POSIX
   if (result == NULL)