Sync with the latest Gnulib code (6f2d632)

1 files changed, 56 insertions, 77 deletions

diff --git a/gl/xalloc.h b/gl/xalloc.h
index 6122cc58..da7c4b6b 100644
--- a/gl/xalloc.h
+++ b/gl/xalloc.h
@@ -1,8 +1,6 @@
 /* xalloc.h -- malloc with out-of-memory checking
 
-   Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
-   2000, 2003, 2004, 2006, 2007, 2008, 2009, 2010 Free Software Foundation,
-   Inc.
+   Copyright (C) 1990-2000, 2003-2004, 2006-2013 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
@@ -18,64 +16,54 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifndef XALLOC_H_
-# define XALLOC_H_
+#define XALLOC_H_
 
-# include <stddef.h>
+#include <stddef.h>
 
+#include "xalloc-oversized.h"
 
-# ifdef __cplusplus
-extern "C" {
-# endif
+_GL_INLINE_HEADER_BEGIN
+#ifndef XALLOC_INLINE
+# define XALLOC_INLINE _GL_INLINE
+#endif
 
+#ifdef __cplusplus
+extern "C" {
+#endif
 
-# ifndef __attribute__
-#  if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8)
-#   define __attribute__(x)
-#  endif
-# endif
 
-# ifndef ATTRIBUTE_NORETURN
-#  define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
-# endif
+#if __GNUC__ >= 3
+# define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
+#else
+# define _GL_ATTRIBUTE_MALLOC
+#endif
 
-# ifndef ATTRIBUTE_MALLOC
-#  if __GNUC__ >= 3
-#   define ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
-#  else
-#   define ATTRIBUTE_MALLOC
-#  endif
-# endif
+#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
+# define _GL_ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args))
+#else
+# define _GL_ATTRIBUTE_ALLOC_SIZE(args)
+#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) ATTRIBUTE_MALLOC;
-void *xzalloc (size_t s) ATTRIBUTE_MALLOC;
-void *xcalloc (size_t n, size_t s) ATTRIBUTE_MALLOC;
-void *xrealloc (void *p, size_t s);
+extern _Noreturn void xalloc_die (void);
+
+void *xmalloc (size_t s)
+      _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_ALLOC_SIZE ((1));
+void *xzalloc (size_t s)
+      _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_ALLOC_SIZE ((1));
+void *xcalloc (size_t n, size_t s)
+      _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_ALLOC_SIZE ((1, 2));
+void *xrealloc (void *p, size_t s)
+      _GL_ATTRIBUTE_ALLOC_SIZE ((2));
 void *x2realloc (void *p, size_t *pn);
-void *xmemdup (void const *p, size_t s) ATTRIBUTE_MALLOC;
-char *xstrdup (char const *str) ATTRIBUTE_MALLOC;
-
-/* 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))
-
+void *xmemdup (void const *p, size_t s)
+      _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_ALLOC_SIZE ((2));
+char *xstrdup (char const *str)
+      _GL_ATTRIBUTE_MALLOC;
 
 /* In the following macros, T must be an elementary or structure/union or
    typedef'ed type, or a pointer to such a type.  To apply one of the
@@ -84,41 +72,31 @@ char *xstrdup (char const *str) ATTRIBUTE_MALLOC;
 
 /* Allocate an object of type T dynamically, with error checking.  */
 /* extern t *XMALLOC (typename t); */
-# define XMALLOC(t) ((t *) xmalloc (sizeof (t)))
+#define XMALLOC(t) ((t *) xmalloc (sizeof (t)))
 
 /* Allocate memory for N elements of type T, with error checking.  */
 /* extern t *XNMALLOC (size_t n, typename t); */
-# define XNMALLOC(n, t) \
-    ((t *) (sizeof (t) == 1 ? xmalloc (n) : xnmalloc (n, sizeof (t))))
+#define XNMALLOC(n, t) \
+   ((t *) (sizeof (t) == 1 ? xmalloc (n) : xnmalloc (n, sizeof (t))))
 
 /* Allocate an object of type T dynamically, with error checking,
    and zero it.  */
 /* extern t *XZALLOC (typename t); */
-# define XZALLOC(t) ((t *) xzalloc (sizeof (t)))
+#define XZALLOC(t) ((t *) xzalloc (sizeof (t)))
 
 /* Allocate memory for N elements of type T, with error checking,
    and zero it.  */
 /* extern t *XCALLOC (size_t n, typename t); */
-# define XCALLOC(n, t) \
-    ((t *) (sizeof (t) == 1 ? xzalloc (n) : xcalloc (n, sizeof (t))))
-
+#define XCALLOC(n, t) \
+   ((t *) (sizeof (t) == 1 ? xzalloc (n) : xcalloc (n, sizeof (t))))
 
-# if HAVE_INLINE
-#  define static_inline static inline
-# else
-void *xnmalloc (size_t n, size_t s) ATTRIBUTE_MALLOC;
-void *xnrealloc (void *p, size_t n, size_t s);
-void *x2nrealloc (void *p, size_t *pn, size_t s);
-char *xcharalloc (size_t n) ATTRIBUTE_MALLOC;
-# endif
-
-# ifdef static_inline
 
 /* Allocate an array of N objects, each with S bytes of memory,
    dynamically, with error checking.  S must be nonzero.  */
 
-static_inline void *xnmalloc (size_t n, size_t s) ATTRIBUTE_MALLOC;
-static_inline void *
+XALLOC_INLINE void *xnmalloc (size_t n, size_t s)
+                    _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_ALLOC_SIZE ((1, 2));
+XALLOC_INLINE void *
 xnmalloc (size_t n, size_t s)
 {
   if (xalloc_oversized (n, s))
@@ -129,7 +107,9 @@ xnmalloc (size_t n, size_t s)
 /* Change the size of an allocated block of memory P to an array of N
    objects each of S bytes, with error checking.  S must be nonzero.  */
 
-static_inline void *
+XALLOC_INLINE void *xnrealloc (void *p, size_t n, size_t s)
+                    _GL_ATTRIBUTE_ALLOC_SIZE ((2, 3));
+XALLOC_INLINE void *
 xnrealloc (void *p, size_t n, size_t s)
 {
   if (xalloc_oversized (n, s))
@@ -192,7 +172,7 @@ xnrealloc (void *p, size_t n, size_t s)
 
    */
 
-static_inline void *
+XALLOC_INLINE void *
 x2nrealloc (void *p, size_t *pn, size_t s)
 {
   size_t n = *pn;
@@ -203,9 +183,9 @@ x2nrealloc (void *p, size_t *pn, size_t s)
         {
           /* The approximate size to use for initial small allocation
              requests, when the invoking code specifies an old size of
-             zero.  64 bytes is the largest "small" request for the
-             GNU C library malloc.  */
-          enum { DEFAULT_MXFAST = 64 };
+             zero.  This is the largest "small" request for the GNU C
+             library malloc.  */
+          enum { DEFAULT_MXFAST = 64 * sizeof (size_t) / 4 };
 
           n = DEFAULT_MXFAST / s;
           n += !n;
@@ -229,16 +209,15 @@ x2nrealloc (void *p, size_t *pn, size_t s)
 /* Return a pointer to a new buffer of N bytes.  This is like xmalloc,
    except it returns char *.  */
 
-static_inline char *xcharalloc (size_t n) ATTRIBUTE_MALLOC;
-static_inline char *
+XALLOC_INLINE char *xcharalloc (size_t n)
+                    _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_ALLOC_SIZE ((1));
+XALLOC_INLINE char *
 xcharalloc (size_t n)
 {
   return XNMALLOC (n, char);
 }
 
-# endif
-
-# ifdef __cplusplus
+#ifdef __cplusplus
 }
 
 /* C++ does not allow conversions from void * to other pointer types
@@ -275,7 +254,7 @@ xmemdup (T const *p, size_t s)
   return (T *) xmemdup ((void const *) p, s);
 }
 
-# endif
+#endif
 
 
 #endif /* !XALLOC_H_ */