X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fvasnprintf.h;h=5e3d291cf90f778bd874ec9fce236826272c6c50;hb=692679fcbebba0095bae0f1f1a99bd1f0f5a0476;hp=4edb95d6547f240cb2a2fdb7d195ae4ec9eb0c0c;hpb=757bd39e4b07efaefaef3ef11027b7b7b40f5911;p=gnulib.git

diff --git a/lib/vasnprintf.h b/lib/vasnprintf.h
index 4edb95d65..5e3d291cf 100644
--- a/lib/vasnprintf.h
+++ b/lib/vasnprintf.h
@@ -1,5 +1,5 @@
 /* vsprintf with automatic memory allocation.
-   Copyright (C) 2002-2003 Free Software Foundation, Inc.
+   Copyright (C) 2002-2004, 2007-2010 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
@@ -13,7 +13,7 @@
 
    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.  */
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
 
 #ifndef _VASNPRINTF_H
 #define _VASNPRINTF_H
@@ -25,19 +25,18 @@
 #include <stddef.h>
 
 #ifndef __attribute__
-/* This feature is available in gcc versions 2.5 and later.  */
-# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__
-#  define __attribute__(Spec) /* empty */
-# endif
-/* The __-protected variants of `format' and `printf' attributes
-   are accepted by gcc versions 2.6.4 (effectively 2.7) and later.  */
+/* The __attribute__ feature is available in gcc versions 2.5 and later.
+   The __-protected variants of the attributes 'format' and 'printf' are
+   accepted by gcc versions 2.6.4 (effectively 2.7) and later.
+   We enable __attribute__ only if these are supported too, because
+   gnulib and libintl do '#define printf __printf__' when they override
+   the 'printf' function.  */
 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
-#  define __format__ format
-#  define __printf__ printf
+#  define __attribute__(Spec)   /* empty */
 # endif
 #endif
 
-#ifdef	__cplusplus
+#ifdef __cplusplus
 extern "C" {
 #endif
 
@@ -47,13 +46,34 @@ extern "C" {
    If successful, return the address of the string (this may be = RESULTBUF
    if no dynamic memory allocation was necessary) and set *LENGTHP to the
    number of resulting bytes, excluding the trailing NUL.  Upon error, set
-   errno and return NULL.  */
+   errno and return NULL.
+
+   When dynamic memory allocation occurs, the preallocated buffer is left
+   alone (with possibly modified contents).  This makes it possible to use
+   a statically allocated or stack-allocated buffer, like this:
+
+          char buf[100];
+          size_t len = sizeof (buf);
+          char *output = vasnprintf (buf, &len, format, args);
+          if (output == NULL)
+            ... error handling ...;
+          else
+            {
+              ... use the output string ...;
+              if (output != buf)
+                free (output);
+            }
+  */
+#if REPLACE_VASNPRINTF
+# define asnprintf rpl_asnprintf
+# define vasnprintf rpl_vasnprintf
+#endif
 extern char * asnprintf (char *resultbuf, size_t *lengthp, const char *format, ...)
        __attribute__ ((__format__ (__printf__, 3, 4)));
 extern char * vasnprintf (char *resultbuf, size_t *lengthp, const char *format, va_list args)
        __attribute__ ((__format__ (__printf__, 3, 0)));
 
-#ifdef	__cplusplus
+#ifdef __cplusplus
 }
 #endif